Key Questions to Ask When Ordering 5 kg tilting platinum melting furnace

Platinum, is a heavy, malleable, ductile, highly inactive, silverish-white transition metal. Platinum is a member of group 10 elements of the periodic table.It is one among the scarce elements found in Earth's crust and has six naturally occurring isotopes. It is also achemical element.

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Precious metals refining processes have developed considerably in recent years. The older or classical process involved first roasting the Platinum Group Metal(PGM) concentrate. This made the rhodium, iridium and ruthenium. The platinum, palladium and gold were then dissolved and separated by a series of subsequent precipitations.

The remaining residue was then upgraded by pyro-metallurgical and leaching processes before being separated into individual metals. Final purification of all metals was carried out by repeated dissolution and precipitation. Platinum however have many downfalls to mining it, for example, opening pit mining is very disturbing to the land on which it is happening. Platinum is also very costly and with the economy how it is many people might not be able to afford platinum.

1.1, Early Platinum Mining

Native platinum and platinum alloys can be found in concentrated sand and gravel beds called placer deposits. The sand and gravel beds are created when old rock is eroded from its source and further ground into pieces as it is washed into streams and rivers. Most of the world's placer platinum is found in Russia. In the 19th century, alluvial deposits in the Ural Mountains were heavily mined. However, these deposits have been stripped of their highest-grade ore and now account for less than one percent of the platinum production from Russia.

Over the past ten years, significant quantities of platinum have been produced from two alluvial deposits in the far eastern region of Russia: the Kondyor mine in Khabarovsk region and the Koryak mine in Kamchatka. Together these two operations produced 185,000 oz of platinum in .

Mining platinum in placer deposits is a relatively simple process. Dredges scoop the platinum-bearing sand or gravel from riverbeds or mining pits. The material is washed until platinum grains or nuggets are captured and pulled from the surrounding material.

Platinum is also mined as an ore. Platinum ores such as sperrylite and cooperite may be mined when they are found in quantities that make extraction economically feasible. In other situations, platinum is obtained as a by-product when ores of other metals, such as copper and nickel, are refined.

1.2, Modern Platinum Mining Techniques

Most of the mining for platinum ore occurs deep underground. To extract the mineral-rich materials, miners pack explosives into holes drilled in the rock and blast it into smaller pieces. The broken rock is then collected and transported to the surface for processing.

Refining platinum ore is a costly and laborious process. It can take from eight weeks to six months to process a batch of ore, and it can take up to 12 tons (11 tonnes) of ore to produce a single troy ounce of platinum.

Once the broken ore is transported to the surface of the mine, it is crushed by machinery into small pieces and mixed with water and chemicals, which bind to the platinum and other metals.

In a process called flotation separation, air bubbles are blown through the mixture and carry platinum particles to the surface of the bath. The platinum-rich froth is skimmed from the bath and allowed to dry into a concentrated powder. One ton of dried platinum powder may contain between 3 and 30 ounces (85 to 850 grams) of PGMs.

The dried platinum powder is then heated to extremely high temperatures to remove impurities. Air is blown over the matte that remains after smelting to eliminate unwanted iron and sulfur. At this point, the PGM content of the matte is now about 50 ounces (1.4 kg) per ton.

Further chemical processing will remove any base metals remaining in the matte, such as copper and nickel. At this stage, the mineral concentrate contains about 15 to 20 percent PGMs. In the final stage, the mineral concentrate is treated with aqua regia to dissolve the platinum. The solution is filtered, purified, and burned to produce pure platinum metal.

Platinum deposits are located in only a few areas of the world. For every ten gold mines there is only a single platinum mine. All the platinum ever mined would fill a room no more than 25 feet square. Today, world platinum production hovers at about seven million troy ounces per year.
More than 70 percent of the world's platinum supply comes from the Bushveld Complex in South Africa's Transvaal. Platinum was discovered in this region in , further fueling the world's platinum craze.

Russia is the second largest producer of platinum. The Norilsk-Talnakh region of Siberia contributes 20 percent of the world's platinum supply, which is retrieved from massive nickel-copper-palladium deposits some meters below the surface. Another six percent of the world's supply comes from North America, where large deposits can be found in Montana, Alaska, and in Ontario, Canada.

1.3, Business value and investment market

There have been traces of platinum that go back thousands of years. But it is still seen as a relatively new form of precious metal. This is because the first European reference to its use only goes back less than 500 years to the 16th century. The Spanish tended to see platinum as an impure version of gold, but they got this wrong. More research and testing wasn't done until the 18th century when Charles Wood found samples of it in Jamaica. William Brownrigg then presented his findings to Royal Society.

In commercial terms, platinum is now obtained as a by-product from nickel and copper mining and processing. Today, platinum is most commonly used in the production of new cars. Vehicle emissions control devices rely heavily on platinum.

These are known as catalytic converters. This is the single biggest use of platinum in the contemporary world though it took a slight hit after the VW emissions scandal. But it is also used for things like jewelry and as a form of investment. It is also often simply used as a symbol of wealth because of the rarity associated with platinum.

1.43, Platinum is more ductile than gold and sliver

The wire length was based on calculating a constant volume from the starting rod, based on the final wire thickness of 0. mm. Having redone the calculation the final figure came out a factor of 10 higher at 27,777 km (see calculation below).

In order to draw the platinum down that far some tricks have to be used. The main one is that the platinum is drawn down most of the way (0.01 mm), then embedded into silver and the combination is drawn down again (the Wollaston process). The silver is then dissolved off the platinum leaving the 0. mm wire behind. Given that, the length calculated above is correct, but to our knowledge no one has ever tried to draw a bar of platinum fully down to that length. Additionally, in practice a slightly longer bar would be needed to account for the small amounts lost in the process (such as the ends to thread the die with).

The Wollaston process was initially attempted on gold, but the only method available for 'coating' the gold wire was to drill a hole along the silver wire and thread the gold along it. This was difficult, and the higher melting point of platinum offered much easier coating methods, so Wollaston switched to using platinum. With today's more advanced coating technologies, it may now be possible to coat the gold wire and draw down using the same method. Therefore it is not possible to say whether this proves a higher ductility for platinum under those conditions.

Without using this technique, both gold and platinum are sold as 0.01 mm diameter wire, which does not prove that either is more ductile.

Also, as a metallurgist, it is questionable whether comparing ductility in terms of length per gram is meaningful. Ductility is a measure of possible strain under applied stress, neither of which is measured in terms of weight. This becomes important when considering two metals, one of which has half the density of the other.

In a typical tensile test to ASTM standards, the size of the sample is set, not the weight. If these two hypothetical alloys fail after the same extension, they should be the same ductility. However, if they were compared by weight, one would be considered twice as 'ductile' as the other, despite the fact that both failed under equal strain.

Specific ductility would be the metal's ductility divided by its density, and might be used for materials selection to pick the lightest metal with the correct ductility. However this not the same as the above described situation.

In summary, the length is theoretically correct, but it may be possible to achieve the same length for gold using the same method. Therefore it is not possible at this time to say whether gold or platinum is the more ductile.

This is like any other a growing market and manufacturers are competing to meet the quality and the price and become the market leaders in almost all countries around the world. When choosing the best melting furnace you need to pay attention to several categories such as platinum melting point, smelting platinum ore as well as platinum refining process.

All these need to be taken into consideration because the quality of a final product depends on the quality of the furnace you choose. What's more, it's highly important to pay attention to sizes as there are furnaces that are small-sized, medium-sized and those that are big and used only in mass production.

As much as platinum ore refining process in important, when choosing a new melting furnace, you need to choose a product that is reliable and that is also easy to maintain and service. This means that you should choose a platinum melting furnace that has digital control with diagnostic features included.

What's even more important is to choose the furnace with an advanced safety switch because even though they are very safe nowadays, you can never be safe enough and you need to avoid accidents when you can. In addition, since you might think that there are only furnaces that use a lot of power, you might want to explore more, because there is at least one melting furnace on the market that can help you save energy.

2.1, Vacuum electroslag platinum melting induction furnace

Vacuum induction melting furnace is one of the most widely equipment used in the field of vacuum metallurgy .The alloy and special steel needed for aerospace, missile, rocket, atomic energy equipment and electronics industry, a considerable proportion of the products are produced by vacuum induction melting furnace

For example, the hot workability and mechanical properties of nickel base, cobalt based and iron based superalloys are improved by vacuum induction melting furnace.

Such as stainless steel, heat-resistant steel, ultra high strength steel, tool steel, bearing steel, and magnetic material, elastic alloy, expansion alloy and so on, almost all are melted by vacuum induction melting furnace to ensure the material performance and quality.

With the development of the second remelting process, the other purpose of vacuum induction melting furnace is to provide high quality consumable electrode for vacuum consumable arc furnace or electroslag remelting furnace, and to produce master alloy for precision casting.

As is known to all, the whole process of melting, refining and alloying of metals in vacuum induction melting furnace is carried out in vacuum, thus avoiding the pollution of the same gas phase interaction,

Secondly, under the vacuum condition, carbon has strong deoxidization ability, and its deoxidation product CO is pumped out of the system continuously, overcoming the pollution problem of deoxidation with metal deoxidizer.

The chemical composition of the alloy can be controlled accurately by the vacuum induction melting furnace. The active elements such as Al, Ti, B and Zr, which have strong affinity with oxygen and nitrogen, can be controlled in a very small range.For low melting point volatile metal impurities, such as Pb, Bi, Sn, Sb and other evaporation can be removed, which plays an important role in improving the performance of materials.

The strong stirring action can accelerate the reaction speed, which has a good effect on the uniform temperature and uniform chemical composition of the melting pot.

The rapid development of vacuum induction melting technology is closely related to the high temperature alloy materials needed for aerospace industry, such as aerospace, missile, rocket, atomic energy equipment and other superalloys.

This is mainly due to the use of vacuum induction melting furnace smelting nickel, iron, cobalt based alloy, reduce the gap elements O2, N2, H2, can completely remove the non-metallic inclusions, and low melting point metal removal of harmful impurities, such as Pb, Bi, Sb, Cu, Sn, Te etc..

Vacuum induction melting furnace equipment is mainly composed of a furnace shell, inductor, crucible and furnace tilting mechanism, mold mechanism, power supply device, and a water cooling system. The furnace shell is equipped with observation, temperature measurement, feeding, sampling, tamping and other devices. The furnace is equipped with a vacuum system, a power supply system and a control system. There are two kinds of vacuum induction melting furnaces: intermittent type and semi continuous type, which can be used as horizontal or vertical type

To sum up, vacuum induction melting furnace has the following characteristics:
(1) in vacuum, it can melt some valuable active metals, such as titanium alloy, etc..
(2) in vacuum, it can prevent melting of metals and alloys, and react with non-metallic inclusions.
(3) in vacuum, the harmful dissolved gases and pollutants in molten metals can be removed.

2.2, step 1: Casting bullion

The coreless induction melting is designed for melting and holding ferrous& non-ferrous metals . Our Induction smelters with a melting capacity of 1 kg to 500kg. Power range is from 3.5kw to 160kw.Nowadays Induction melters are used to replace cupolas since the cupolas end to emit a lot of dust and other dangerous pollutants.

The Medium frequency Induction metal melting furnace manufactured by Superbmelt, have ideal multiple protection functions ' over current;over voltage; insufficient water pressure; high water temperature; low voltage and phase loss. The advantages of our melting equipment are: high energy savings; low grid impact; high melting rate; small oxidation loss; uniformity of metallic composition; easily controlled temperature; excellent insulation qualities etc.

2.3, Platinum resistance furnaces

The introduction of high temperature sintering and refining techniques in the electronic industry, the extension of the use of combustion analysis in the control of steel-making, as well as the requirements of metallurgical and ceramic research, all contribute to the demand for an accurately controllable source of high temperature heat. This demand has been largely met by the platinum-wound furnace, which possesses a combination of properties unique in the high temperature field. It is compact, simple in construction and operation, easy to control and widely adaptable. It can be used at temperatures up to °C without the need for a protective atmosphere.Of the available types, the horizontal tubular models are the most widely used, and these alone will be considered in detail here.

Before the last war, it was in the laboratory itself that most of the platinum-wound furnaces were constructed. At that time, little fundamental data existed and it was therefore not surprising that these furnaces met with a widely varying degree of success. Failures which subsequent experience has shown were largely due to faulty methods of construction were frequently attributed to defective resistor material or to impure refractories. It is only in comparatively recent years that a thorough investigation of constructional methods has been made and it is now apparent that, in a furnace of sound design, not only must great care be taken in the construction of the element but at least as much attention must be paid to the general furnace design.

Beause Melting metal to mend or re-work your jewellery pieces will help you to expand on the style of jewellery you offer and the variation of jewellery pieces you supply. At Cooksongold, we supply all the metal melting equipment you need to successfully liquefy metal.

From hand torches to scorifiers, tongs and butane gas lighter fuel ' we really are the one-stop shop for all your metal melting equipment. Browse our range of metal melting equipment and find our quality melting tools in a selection of shapes and sizes.

3.1, History of use of platinum

Platinum is one of the rarest and most expensive metals used in the modern world.

While platinum's rarity is similar to that of gold, far less of it is used in the minting of bullion. Platinum's desirability comes from its beautiful luster, resistance to tarnishing (unlike other white metals), and metal strength. These characteristics make it very popular as jewelry.

Platinum has been integrated into human life since the time of the ancient Egyptians; however, an understanding of this beautiful metal was not reached until centuries later. Here,you will find a brief history of this white metal and its most common uses today.

Early History

Archaeologists' earliest discoveries of platinum date back to the ancient Egyptians. Specifically, the famous Casket of Thebes was found to be adorned with platinum, along with gold and silver. Additionally, indigenous South American peoples were known to incorporate platinum into their ceremonial jewelry such as nose rings and necklaces.

These ancient uses of platinum likely did not consist of the pure metal itself; rather, they likely were made from commonly found platinum mixtures (or 'alloys') that included palladium or iridium.

Spanish Discovery

When the first Spanish explorers landed in the New World, they discovered not only gold, but platinum, as well. These 16th century Conquistadors did not see platinum for the rare luxury it is today, however. They found platinum nuggets amidst their newfound gold and thought the 'white' metal to be a nuisance. For this reason, much of the newly discovered platinum was discarded.

The Spanish called this new metal 'platina,' which is derivative of the Spanish word for silver ('plata').

Early Uses

Platinum's credited discoverer was Antonio de Ulloa, who returned to Spain in with platinum samples and news of this new metal's strange properties. Platinum was not recognized as its own element until AD, when it was successfully melted down. In the years following, platinum's melting point was determined as well as its corrosion resistance and lack of pliability. At this time, it was mostly used as decoration and for laboratory instruments.

Around this time, platinum also began to grab the interest of jewelers and other metal workers. Marc Janety, goldsmith to Louis XVI, began to use platinum to fashion buttons and chains for clothing as well as expensive cutlery and other luxury items.

Platinum was not widely used for jewelry until the development of jewelry torches that could reach the high temperatures needed to manipulate the metal. Louis Cartier was the first to create jewelry pieces utilizing platinum, and Cartier was able to bring platinum's durability and luster to light in this way. Cartier's platinum jewelry was widely popular, and he was considered by King Edward VII of England to be the 'jeweler of kings and the king of jewelers.'

New Platinum Sources

While platinum usage began to gain popularity, supply of the metal was limited. Until the 's, Colombia was the only major producer of platinum in the world, and it stopped exporting the metal around that time. Soon after, platinum was discovered in the Ural Mountain gold fields in Russia where it was mined and made into roubles. Russia would remain the leading source of platinum for years, and they are credited with introducing platinum as a symbol of wealth just like gold.

In the 's, Ontario discovered of platinum in its nickel-copper ores, and Canada became the world's major platinum supplier after World War I. South Africa also became an important source for platinum beginning in the 's when a farmer discovered the metal in a riverbed. Today, South Africa is also a world leader in platinum production.

20th Century Platinum Bullion

Beginning in the 's, the Arab Oil Embargo caused a rapid increase in the prices of precious metals, including platinum. It was at this time that platinum bars were introduced for individual investors to purchase. This began in Japan, but soon spread to Europe and the United States with the continued rise in prices.

The 's also brought the production of platinum coinage. The Isle of Man first produced a one-ounce platinum bullion coin, and its popularity caused other mints to follow suit. Australia's platinum Koala and Canada's Platinum Maple Leaf coins were both released in and were received with high demand. These coins, along with the American Platinum Eagle, brought the platinum investment market to new heights.

Modern Usage

In the modern day, platinum has numerous uses. Firstly, platinum jewelry remains a popular option due to its tarnish resistance, unlike silver. Platinum is mostly used industrially as material for catalytic converters in vehicle engines. Platinum is effective for converting harmful emissions from engines into less-harmful waste. Platinum's catalytic abilities are also used within the oil industry to extract gasoline from crude oil.

Platinum is also widely used in the electronic industry to create hard disks for computer storage. Platinum boosts the disk's magnetic properties and increases storage capacity.

Finally, platinum serves the medical industry. The metal is used for a variety of purposes including dental fillings, pacemakers, and even chemotherapy treatments for cancers.

If you would like to make a platinum coin or bar your next investment piece, Provident Metals offers both domestic and foreign platinum bullion products.

3.2, Casting gold sheet

Platinum is produced in five countries in the world. Of these, South Africa is by far the largest producer, accounting for over 75% of global output in , reports Creamer Media's Research Channel Africa.

In second position is Russia, which produced almost 14% of global platinum output in , followed by Canada, the US and Zimbabwe.

Professor Grant Cawthorn indicates, in a paper on the platinum and palladium 'resources of the Bushveld Complex published in the South African Journal of Science, that it is generally understood that the Bushveld Complex was formed by the repeated 'injection of magma into an enormous chamber. Owing to the huge volumes of magma involved, cooling and subsequent mineral crystallisation out of the magma was a slow process. Different minerals were formed as the magma cooled. These minerals accumulated into subhorizontal layers, building from the base of the chamber. The processes were repeated by the intermittent replenishment and the addition of existing and new magma as the case may be, producing a repetitive mineral layering.

Mining company Impala Platinum (Implats), in its review of the geology of the Bushveld Complex, indicates that individual 'layers or groups of layers of the Bushveld Complex can be traced for hundreds of kilometres. This layered sequence, the Rustenburg Layered Suite, comprises five principal zones, the marginal, lower, critical, main and upper zones. 'The Bushveld Complex is, horizontally, roughly clover-leaf shaped, consisting of four compartments or limbs ' western, eastern, northern and southern in order of economic 'importance.

Research Channel Africa states that the Bushveld Complex is distinctive in size, 'covering an aerial extent of some 66 000 km2, and distinctive in the economic importance of its minerals. Contained within the well-'layered ultramafic to mafic succession are two horizons in the critical zone that host economically exploitable quantities of platinum-group metals (PGMs), namely the Merensky reef and the underlying upper group two (UG2) reef. 'These two economic horizons can be traced for 370 km around the complex and are the focus of mining operations from which the PGMs ' platinum, palladium, 'rhodium, ruthenium and iridium ' are 'recovered, together with quantities of gold, nickel, copper and numerous other metals and compounds. 'Below the UG2 reef are numerous other chromitite layers that are mined for chro-'mium, as their PGMs content is too low.

A third PGMs-rich ore body, the Platreef, which extends over a distance of 30 km, is found only on the northern limb, in the 'vicinity of Mokopane, in Limpopo province. 'This ore body, first mined in the s, was not exploited on a large scale until .

3.3, What equipment is needed to mine platinum

Most of the mining for platinum ore occurs deep underground. To extract the mineral-rich materials, miners pack explosives into holes drilled in the rock and blast it into smaller pieces. The broken rock is then collected and transported to the surface for processing.

Refining platinum ore is a costly and laborious process. It can take from eight weeks to six months to process a batch of ore, and it can take up to 12 tons (11 tonnes) of ore to produce a single troy ounce of platinum.

Once the broken ore is transported to the surface of the mine, it is crushed by machinery into small pieces and mixed with water and chemicals, which bind to the platinum and other metals.

The dried platinum powder is then heated to extremely high temperatures to remove impurities. Air is blown over the matte that remains after smelting to eliminate unwanted iron and sulfur. At this point, the PGM content of the matte is now about 50 ounces (1.4 kg) per ton.

For more 5 kg tilting platinum melting furnaceinformation, please contact us. We will provide professional answers.

Further chemical processing will remove any base metals remaining in the matte, such as copper and nickel. At this stage, the mineral concentrate contains about 15 to 20 percent PGMs. In the final stage, the mineral concentrate is treated with aqua regia to dissolve the platinum. The solution is filtered, purified, and burned to produce pure platinum metal.

3.4, Casting gold sheet

Crucible are used in the laboratory to contain chemical compounds when heated to extremely high temperatures. Crucibles are available in several sizes and typically come with a correspondingly-sized lid.

When heated over a flame, the crucible is often held inside a pipeclay triangle which itself is held on top of a tripod.

A student conducting a chemistry experiment using a crucible

Crucibles and their covers are made of high temperature-resistant materials, usually porcelain, alumina or an inert metal. One of the earliest uses of platinum was to make crucibles. Ceramics such as alumina, zirconia, and especially magnesia will tolerate the highest temperatures. More recently, metals such as nickel and zirconium have been used. The lids are typically loose-fitting to allow gases to escape during heating of a sample inside. Crucibles and their lids can come in high form and low form shapes and in various sizes, but rather small 10'15 ml size porcelain crucibles are commonly used for gravimetric chemical analysis. These small size crucibles and their covers made of porcelain are quite cheap when sold in quantity to laboratories, and the crucibles are sometimes disposed of after use in precise quantitative chemical analysis. There is usually a large mark-up when they are sold individually in hobby shops.

Platinum metal has a number of useful properties, which explains its application in a wide range of industries. It is one of the densest metal elements'almost twice as dense as lead'and very stable, giving the metal excellent corrosion resistant properties. A good conductor of electricity, platinum is also malleable (able to be formed without breaking) and ductile (able to be deformed without losing strength) .

Platinum is considered a biologically compatible metal because it is non-toxic and stable, so it does not react with or negatively affect body tissues. Recent research has also shown platinum to inhibit the growth of certain cancerous cells.

4.1, Platinum refining process

Platinum is always found alongside other PGMs. In South Africa's Bushveld complex and a limited number of other ore bodies, PGMs occur in sufficient quantities so as to make it economical to exclusively extract these metals; whereas, at Russia's Norilsk and Canada's Sudbury deposits platinum and other PGMs are extracted as by-products of nickel and copper. Extracting platinum from ore is both capital and labor-intensive. It can take up to 6 months and 7 to 12 tons of ore to produce one troy ounce (31.135g) of pure platinum.

The first step in this process is to crush platinum containing ore and immerse it in the reagent containing water; a process known as 'froth flotation'. During flotation, air is pumped through the ore-water slurry. Platinum particles chemically attach on to the oxygen and rise to the surface in a froth that is skimmed off for further refining.

4.2, Platinum chemical processing

Platinum's corrosion resistance and high-temperature stability make it ideal as a catalyst in chemical reactions. Catalysts speed up chemical reactions without themselves being chemically altered in the process.

Platinum's main application in this sector, accounting for about 37% of total demand for the metal, is in catalytic converters for automobiles. Catalytic converters reduce harmful chemicals from exhaust emissions by initiating reactions that turn over 90% of hydrocarbons (carbon monoxide and oxides of nitrogen) into other, less harmful, compounds.

Platinum is also used to catalyze nitric acid and gasoline; increasing the octane levels in fuel. In the electronics industry, platinum crucibles are used to make semiconductor crystals for lasers, while alloys are used to make magnetic disks for computer hard drives and switch contacts in automotive controls.

4.3, Platinum jewelry and decoration process

Although platinum most often naturally occurs in placer deposits, platinum and platinum group metal (PGM) miners usually extract the metal from sperrylite and cooperite, two platinum-containing ores.

Platinum is always found alongside other PGMs. In South Africa's Bushveld complex and a limited number of other ore bodies, PGMs occur in sufficient quantities so as to make it economical to exclusively extract these metals; whereas, at Russia's Norilsk and Canada's Sudbury deposits platinum and other PGMs are extracted as by-products of nickel and copper. Extracting platinum from ore is both capital and labor-intensive. It can take up to 6 months and 7 to 12 tons of ore to produce one troy ounce (31.135g) of pure platinum.

The first step in this process is to crush platinum containing ore and immerse it in the reagent containing water; a process known as 'froth flotation'. During flotation, air is pumped through the ore-water slurry. Platinum particles chemically attach on to the oxygen and rise to the surface in a froth that is skimmed off for further refining.

Platinum group metals such as platinum and palladium alloys are challenging in investment casting due to their high melting temperature and reactivity. This paper reviews the work that has been done in recent years to better understand the challenges of the process.

This included detailed characterization of the crucible and investment reactions, studying the role of the different process parameters, new alloy developments and the determination of microstructure and mechanical properties of the alloys on the market.

The producers of crucibles, investment powder and casting machines were involved in the process optimization together with alloy producers and casters. The experimental work was supported by state-ofthe-art simulation techniques of the alloy thermodynamics and the actual casting process (form filling and solidification).

Post processing after casting, such as hot isostatic pressing (HIP), is becoming more common in jewellery industry due to the beneficial effect on the mechanical properties. So far, the focus was on 950 platinum alloys. The studies showed significant differences among the alloys in terms of castability and properties. With the information now available on process and properties, platinum casting is much better understood and reliable casting quality is achievable

5.1, What is the difference between smelting of platinum group metals and other precious metals (gold, silver)

The platinum group metals (PGM), consist of six elements: platinum, palladium, rhodium, iridium, ruthenium, and osmium. Naturally occurring minerals of PGM may contain the six elements with predominance to either platinum or palladium and varying amounts of the others.

These could be native PGM compounds and alloys such as osmiridium or intermetallic compounds with group 5B and 6B elements such as cooperite or braggite. However, the majority of PGM are currently produced from copper and nickel deposits containing minor quantities of PGM in the parts per million range. Major producing countries of PGM are South Africa and Russia followed by North America

5.2, What are the best platinum casting methods

Medium frequency induction casting machines are usually preferred for casting platinum, since these machines permit atmosphere control and rapid, safe melting. However, most small shops do not have the money for such equipment, so they must rely on the other-and perfectly viable-option:

For torch casting, a vertical centrifugal casting machine is the safest, most efficient, and most reliable way to cast platinum. Vertical machines have high torque, produce a rapid centrifugal force, and require very little maintenance. They are also safer than horizontal centrifuges ' which, if a spill occurs, can fling molten metal in a waist-high circle around the shop. A vertical machine has a straight centrifuge; major spills are very rare, and if one does occur, the flying metal is confined to a narrow vertical area.

The vertical casting machine should be mounted on a sturdy base so that one person can load the flask from the back while another person melts the metal at the front. This two-person approach is important, since with the eye protection required to melt platinum, the operator sees virtually nothing but the glow of melting metal. A machine that's freestanding and bolted to the floor offers the best access.

5.3, How to choose the most suitable platinum casting equipment

For torch casting, the most commonly used platinum casting alloy is platinum 900/iridium 100. This alloy, also referred to as 90/10 iridium, has good working characteristics, casts well, can be welded, and does not oxidize. It also offers a bright white color and has sufficient hardness at 120 Vickers (HV). It was the universal platinum alloy in the United States for many years.

In recent years, many casters have begun using a platinum 950/iridium 50 alloy, known as 95/5 iridium, to comply with the 950 standard. (Many countries, including the United States, require any item stamped 'platinum' to be at least 95 percent pure platinum.) Unfortunately, this alloy is not a good choice for casting. While it has great characteristics for fabricating, including rapid work-hardening, as cast it has a hardness of only 80 HV-far too soft for jewelry. (A minimum hardness of 120 HV is recommended.) With wear, rings bend and scratch, and stones come loose.

One of the finest 950 platinum casting alloys is platinum 950/cobalt 50, also known as 95/5 cobalt. This alloy has a very fine grain, high liquidity, and the ability to fill intricate detail. With a hardness of 135 HV and the ability to cast well and take a good polish, it is one of the most popular casting alloys in Europe and the United States. Platinum 950/cobalt 50 is also slightly ferro-magnetic, making identification easy (you can simply use a magnet to detect attraction).

This alloy does oxidize, however. Because of this tendency, propane and other fuels do not work well with it. Instead, torch melting should be done with a hydrogen/ oxygen fuel mix, which does not permit much oxidation. This alloy is most successfully cast with induction heating in a controlled atmosphere.

Another alternative is platinum 950/copper/ cobalt, which is similar to the platinum/ cobalt alloy, except it is not magnetic. However, it still needs to be cast with hydrogen/ oxygen or by induction to prevent oxidation.

The use of an appropriate furnace, fluxes and additives and the knowledge of an experienced melter play an important role in producing a homogenous final bar. Although using the most optimal melting procedures, there are some instances when is not possible to produce a fully homogenous bar due to separation of metals during the solidification (cooling process). In these instances, the bar assay must show the bar heterogeneity clearly, which will be taken into account during the trading agreement.

At SuperbMelt, we have the best gold smelting equipment that comes with excellent features to make it stand out from the competition. This product can smelt non-ferrous metals such as gold, aluminium, copper, and silver. It can perform high-quality functionality even on metals of 250kg. Our Gold Smelting Equipment can work on metals and smelt at a temperature of degrees Celsius.

Our Gold Smelting Equipment can be used in a wide range of fields, some of which are mentioned below.

1.1, Smelting the Gold Ores

High pressure is usually involved in smelting gold. Heat and chemicals are also needed to ensure that the ore is broken down with the aim of separating it from available impurities. To smelt gold, it needs to be heated to a temperature of around 2,150 degrees Fahrenheit or degrees Celsius. Gold smelting equipment can be used to smelt gold ores, gold dust and gold mines to get rid of none-metal impurities so that pure gold is extracted.

1.2, For Recycling old gold

If you have some old outdated jewelry in your house, it makes sense if you can come up with a way of using it to create something new. This can be done when you have a much more wearing design in mind. This can be best done at home, especially if you are deeply convinced against finding an expert who can do the work for you.

You need to use the right smelting equipment to melt your jewelry down so that you cast it into something new. The same thing can be done with semi-finished products such as plates, tubes, and rods. Maybe you have something with sentimental value, but it does not fit your current lifestyle.

1.3, For Jewelry Casting

Before you cast jewelry, you need to ensure that it is melted so that it is turned into aqueous state, or rather converted from solid to liquid. Thereafter, you can use the smelting process, to improve the purity of your gold. Jewelry casting involves the creation of mold. The mold is then filled with molten metal so that you get a piece of finished jewelry.

This process is generally referred to as lost wax casting, and we are here to tell you that you can do all that with our machine. The process has that name because the process involves the lost of wax. Gold casting is a process that can be applied on gold nuggets and scrap gold to make things such as gold bars or granule for stock and deal.

1.4, For Industrial Applications

We started by making it clear that our gold smelting equipment is created to ensure that you get the most pleasurable application experiences. Despite your preferred field of application, SuperbMlet's Gold Smelting Equipment is there to ensure that what you want is what you get.

Our equipment can be used for industrial applications, and it will record an exclusive performance. We understand that you might be looking to smelt metal in the workplace to come up with various products, which is why we think you might need the benefits that our equipment comes with.

The fact that our equipment can smelt at extremely high temperatures makes it ideal for a vast range of industrial applications. It can be used to smelt non-ferrous metals so that you end up with pure products that would make your business stand out from the competition. They have limited emission, which makes environmental and user friendly.

The world has really advanced, and there are newer ways to smelt gold. In case you haven't known these methods, you better start feeling lucky because we are about to lift the lid for you. But before we get started, let us remind you that most of these things can be done using our gold smelting equipment.

2.1, How to Smelt Gold By Propane Kiln

Wondering how to smelt gold by propane kiln? Read on. To begin, get a crucible container to let you hold the gold as it melts. There are impurities in the gold, and you can use flux to remove them. While doing these things, you need to give your safety the best priority because accidents might occur. Remember you will need to use heating out to generate the heat needed to smelt gold.

A propane kiln can help you melt gold. Once that is done, go ahead and shape your gold. To do this, make sure that the gold is placed in a crucible. If you are handling a finely powdered gold, be careful and make sure that you provide your flame and see that it is done slowly and safely. Failure to do that might have you blow out the whole powder from the crucible.

You need to heat it thoroughly and do it slowly. You need to have the flame right above the powder and try to see that the heating is done while delivering equal amounts of heat to the entire gold metal.

2.2, How to Smelt Gold By Resistance Furnace

Resistance furnace is more of current passing through conductor joule heat that is generated by an electric furnace for the source of heat. In this process, furnace acts as the heat source. It uses electric heating elements to convert electrical energy into the final heat energy. The heat energy is then used to heat metal. Resistance furnace can be used to smelt high amounts of gold, but it still might not be the best method out there.

This method might not be great especially when you are looking to avoid paying huge electricity bills for starters. Again, resistance furnace might develop heat complications, thereby leading to unevenly smelted gold. Therefore, try to use other smelting methods that will ensure that impurities are removed from the gold metal you are working on.

2.3, How to Smelt Gold in Induction Furnace

An induction furnace is an electrical furnace that involves the application of heat through induction heating of metal. Induction furnace comes in a wide range of capacities, from less than a kilo to a hundred tones. These machines are used to melt iron and steel, aluminum, copper, and precious metals.

2.4, Why You Should Choose Induction Furnace

Whether you are a seasoned smelter of a novice, you can always do well with induction furnace. These machines are programmed to smelt gold and other non ferrous metals of any size. They also are great for applications that require accurate supply of heat energy for casting purposes.

Without spending a fortune to get these furnaces, you will be impressed by the fact that they come in compact design with features put in place for precision purposes. The heat is supplied evenly to the entire metal within a short duration and you already have your results. You can always get in touch with us for the best deal since we are some of the key players in the industry.

ModelPropane Melting KilnResistance Melting Furnace Induction Melting Furnace Heating Principle Propane Gas BurningResistance HeatingInduction HeatingPowerPropane Consumption1.7kw3.8kwMelting TimeOver 30 min to melt I kgMelts 1 kg of gold within 20 minutesMelts 2kg of gold within 5 minutesMax Temp degrees degrees degreesMolten Metal Stirring No stirring functionNo stirring function availableThere is a magnetic field that stirs the molten metal to ensure that the alloy is perfectly mixedPower Consumption No electronic consumptionThe induction heating saves more than 10 times power consumption per kilogram compared to resistance melting furnaceProtection alarmNo protection for the gas burning, could lead to risky explosionYou can easily get burned due to lack of protectionThere is an over-heating protection, but there is no water alarmingWorking TimeDepends on propane supplyCan only work for 40 minutes before being let to cool downIt can work 24 hours continuously based on good water coolingMachine LifeAfter frequent use, you will need to replace the heating torchAt least 50% of these machines get broken down after 12 monthsAs long as the cooling is perfect, the machine can last more than five years

An induction furnace features a nonconductive crucible that holds the charge of metals that need to be melted, and a coil of copper wire also surrounds it. There is an aggressive alternating current that is flowing through the wire. It is the coil that creates a rapidly reversing magnetic field which penetrates the metal.

The magnetic field ensures that eddy currents, and circular electric currents are induced inside the metal. It does this through electromagnetic induction. Once the metal has been melted, the vigorous stirring is caused by the eddy currents to ensure that uniform mixing is achieved.

If you have not accessed our products and services, take a look at types of gold smelting furnaces you can have from us.

3.1, Mini 1-2kg Gold Smelting Furnace

SuperbMelt mini gold melting furnace (SPB-DH) is suitable for any of your small-scale gold production. It is capable of melting any gold pieces whose weights fall in the range 1-2Kg.

This small gold smelting machine can in no time reach a maximum temperature of '. This features also make this machine for melting other metals such as silver, copper and aluminium, just to mention a few.

SuperbMelt mini gold melting furnace also finds application in jewellery recycling. It is also very suitable for gold diggers in deals in collecting gold and its alloys.

3.2, Integrated 3-10 kg Gold Melting Furnace

The gold melting furnace is designed for melting 3g ' 10kg gold. It is also suitable to melt other precious metal like silver, copper, palladium.

Induction gold melting furnace is based on the latest and most advanced IGBT induction technology, the top speedy melting could be realized within 2-4 minutes. The crucible is extractable by means of matched tong.Superb gold melting furnace is the better choice for lab, jewelry shop , research institute and mining company comparing with gas melting device and resistance melting type.We will make testing videos for each machine to ensure quality. Superbmelt also provides warranty of full refund due to bad quality within one year.

Let us take a look at the key features of this particular gold smelting equipment.

• Energy saving, Environmental protection, Low pollution level
• Light weight, Economic Space Occupation, Easy installation
• Enhanced monitoring and diagnostics system of SPB-H series gold melting furnace, guarantee the machine of high stability, reliability and security.
• Strict Supplier Management System and ISO :; CE Quality Management System guarantees high quality of each equipment.
• 100% duty cycle, 24hours continuous working ability at maximum power.
• Superb gold melting furnace takes Use of solid-state IGBT inverter and power regulation, soft switch three resonance and frequency automatic tracking technology.
• The top speedy melting rate can finish per batch within 3 mins nearly.

3.3, 20kg-30kg Manual Tilting Melting Furnace

SuperbMelt gold smelting furnace, unlike any other product on the market, comes with awesome specifications. It has the capability of melting 20-30kg of non-ferrous metals like gold, silver, copper, aluminium. It can melt any metal up to a temperature of about ' based on an induction power supply of 25-35kw. All within a short time frame of 6 to 8 minutes.

Induction gold smelting furnace split design enhances easy tilting. This feature which gives the room for the pouring of liquefied metal without splashing or spill.

3.4, 10-50kg Chain Tilting Gold Smelting Furnace

This Gold Smelting Equipment from SuperbMelt comes with superb features that will place you ahead of your competitors. It has unique features that let it smelt 10-50kg of non-ferrous metal such as silver, gold, copper, and aluminium. It has the potential to melt up to a temperature of degrees centigrade. With its awesome features, there is no learning curve linked with this affordable, high-end product. At SuperbMelt, most of our efforts are spent in ensuring that you have the best equipment that can be used for any type of application. It is an innovation that you will use for many years to come.

3.5, 10-100kg Motor Tilting Melting Furnace

Are you looking to smelt any type of non-ferrous metal and in large quantity? Then this furnace must be the solution you have been looking for. It leverages carefully selected smelting technology that can melt between 10 and 100kgs of metals. But that is not all. The 10-100kg Motor Tilting Melting Furnace is one of the best on the market since it melts up to the required temperatures to let you mould your final product with ease.

3.6, 50-250kg Hydraulic Tilting Melting Furnace

This is the best Gold Smelting Equipment that you can get at SuperbMelt. Unlike other products, it is highly aggressive and generates enough energy to smelt non-ferrous metals of between 50 and 250 kg. This hydraulic tilting melting machine does come with sophisticated parts that let it complete the work within the desired time.

Though easy to us, it does not have some parts that you need to handle professionally, but that does not take too much of your time to learn. You can always talk to use beforehand since we have everything required to have a fascinating experience using this highly innovative gold smelting equipment.

Just like any other business, you need to have a good plan before starting to operate. At SuperbMlet, we have many clients looking to

start smelting and melting businesses, without doing the due diligence. Note that any mistakes in the starting stages might make your business sink before it starts to make money. Therefore, since we value our clients, and wish them the best, we would like to share important information on how to choose the right smelting furnace.

Here are some of the things you need to consider when looking for the right gold smelting equipment.

1.The Gold Capacity

This has something to do with the size of your business. For instance, there is no point in looking for a 1kg gold smelting furnace, when you need to produce in large quantities. Though you can always start small as you grow, large businesses require a huge investment to keep with the ever-growing competition. You must have seen up there that we

have any type of equipment that you might need. Before you put your money on any equipment, think about the type of production you would like to take part in and make the most informed decision. If you like, you can go for a furnace that can smelt precious metal of up to 500 kg, depending on what suits your business best.

2.Consider Your Business Model

We are back to the business plan. It is crucial for you to understand your business model before making an initial investment. In case you are looking for something portable, maybe you are a small dealer or small scale gold miner, then there is no reason for you to go for something really huge. This makes sense in that you will spend a lot of money on power and space that you won't need.

Also, small scale producer tends to plough back a small profit margin, so it will take time for them to get ROI in case they opt for the larger equipment. Big miners can use motor tilting furnace or hydraulic tilting furnace. It has adequate features to make you compete fairly as you try to grow your business and dominate a larger portion of the market.

3.Consider the Price

At SuperbMelt, we have any type of furnace that you might be interested in. But as the buyer, you ought to know that price plays a major role. This is important, regardless of the nature of your business. Even large businesses might have to plan well financially so that they do not record losses at the end of a given financial period.

Therefore, instead of exploiting your financial wellbeing, it is advisable to see that you are spending the right amount of money that will not bring your company to its knees. Check out our website for various types of furnaces we have and their prices so that you get what is right for your business's undertakings.

4.Think about applicability

The world has gone tech-savvy overall, and many types of products are introduced in the market each day. With that in mind, you need to only go for what will help your business to thrive. Applicability is one key aspect to consider when thinking of getting the tight Gold Smelting Equipment. This is true in the sense that some of the newest products come with fewer features that limit you from getting high-quality products.

Some of them also consume a lot of energy without reflecting the same on their productivity. If you are just looking to start a business, it is vital to ensure that you are putting your money on something that will not cripple the overall stability of your business. We at SuperbMelt, advice that you test the equipment and ensure that all parts are working fine before making a purchase.

5.The reputation of the Dealer

You are not going to buy from the first dealer you find on the internet or offline. Do your homework fast, and we wish there was a way to emphasize this enough. This is where most buyers go wrong. They want to buy from dealers they know very little about, and they end up with wrong products that cannot even last.

If possible, try to run background research on the reputation of various dealers you wish to buy from and confirm that they have been on the market for some time. Online platforms can be created to review various manufacturers, and you should use them to avoid buying from dealers who do not care about quality. Talk to their previous buyers or rather ask questions on social media about the reputation of various dealers, including SuperbMelt.

If you want to learn more, please visit our website Gold & Platinum Melting Furnace.