Gold Melting Equipment

The Gold Melting Equipment must be designed with the most powerful IGBT induction technology available in the market for 1kg to 50kg of melting of gold. The flexibility provided to melt different kinds of metals are seamlessly by this great feature also gives this machine. Having higher melting temperatures is very realistic with the gold smelter or gold melting equipment.

This machine just in a few minutes of starting, machine can heat up to a maximum temperature of about 1800℃. This machine finds application in various industries. The powerful induction furnace incorporated into this machine’s portable design makes it ideal for the pre-treatment of gold ore. Gold melting equipment can also be used for the purpose of recycling some other precious metals and also gold.

Before buying a gold melting machine, here are a few important features to note:

1. These electronic gold melting equipmentare capable of operating nonstop for 24 hours;
2. All these machines must be equipped with the feature of having a very powerful electromagnetic stirrer which gives your process of mixing the desired level of homogeneity;
3. An Omni-directional warning system must be designed in every-system. This feature helps you detect system; overheating, overvoltage, and water shortage. Any other irregular system frequency gets detected by this system;
4. Safety and Security should be guaranteed with the equipped system of Omni-directional warning;
5. It adheres strictly to the minimum standard of ISO 9001:2015. This assures that the machine can be used in so many countries of the world;
6. Gold Melting Equipment should be lightweight and consume less space; they are very easy to install and operate;
7. Metals such as copper, aluminium and lead can also be melted with this gold melting equipment;
8. During operation, crucibles can be easily replaced. This feature does cleaning and repair very easy and saves you a lot of time

Heap leaching is practised; for extracting gold from low-grade ores, with a dilute solution of sodium cyanide, huge heaps are sprayed, and this percolates down through the piled ore, dissolving the gold.

By the process of cyanidation than by any other process, more gold is recovered. In the process of cyanidation, metallic gold is dissolved and oxidised in an alkaline solution of cyanide. When gold dissolution is fully complete, the gold-bearing solution is separated from the solids.

1.1, Smelting The Gold Ores

The process of extracting metal from ore crushed with a rock jaw crusher is known as smelting. When one hears this name, one may simply associate it with separating a piece of metal from a large chunk of rock, but it’s really not that simple.

Ore is not just a mixture of metal and rock. The metal found in an ore is oxidized quite often, so to strip the oxygen away, you need a chemical transformation. As such, the ore containing precious metal like gold must actually be dumped into a blast furnace along with flux and fuel (which a chemical agent for cleaning).

As the ore is heated more and more in the furnace, the molten metal will drip down into a “bloom”, which is a blob of hot metal that you pull out with tongs. Besides extracting the metal you want, you’ll also get slag, which are the impurities that are separated from the ore.

The Basic Process of Smelting is:

Mercury Removal:

Mercury is many health hazards, especially when in gas form. To remove this hazard, gold precipitates from electrowinning or Merrill–Crowe processes are usually heated before smelting in a retort to recover any leftover mercury present that would otherwise cause environmental and health problems due to its release (volatilization) during the process of smelting. The mercury present in the ore is not usually from the mercury amalgamation process that formal gold mining companies no longer use but from mercury in the ore that has followed gold through the precipitation and leaching processes.

Leaching of the precipitate using sulfuric or nitric acids may be required in the event where there are high levels of copper present.

Iron Removal:

Before smelting, to dissolve iron from the electrowinning cathodes, nitric acid or forced air oven oxidation can also be used. Gravity concentrates can often contain high grinding contents of steel, and so their removal using shaking magnets or tables is used before smelting.

During smelting, using nitre, iron can be oxidized. Excessive use of nitre will be increasing both maintenance costs and the risk of catastrophic leaks by corroding the smelting pot (known as holes in the pot or run-aways, through which the molten charge is lost). For separating iron impurities, magnetic separation is also very effective.

The core-type induction furnace actually reduces the oxidation burn loss of elements. With the induction heating coil along low frequencies associated, reduce the burning rate of the metal elements, consequently minimizing oxidation of the molten steel.

1.2, For Recycling Old Gold

When precious metals like gold are brought into the smelter, first, the gold must be tested before smelting. A large lot of gold when are melted as sampled and are usually made into a brick. Smaller lots of gold usually are hand tested, which is actually altogether a different process.

The steps that are followed to recycle gold from scrap through smelting are given below:

1. From a client, when scrap gold is received, it is weighed first and put into a storage bin until it is ready to be melted or tested.
2. The scrap is turned into gold bricks; once it is time to melt the gold and the operator then scoops up the given scrap gold jewellery and takes it over to the furnace to heat it up.
3. The scrap gold collected is placed into the furnace, usually into an induction furnace, where the crucible temperature begins to rise until it is hot enough to melt the gold into a liquid from solid.
4. For a few moments, the scrap gold will sit in the crucible while the temperature rises due to the provided heat.
5. Next, the scrap gold is ready to be sampled after it liquefies.
6. Once the gold is made ready, a dip sample is collected, and it is tested for the purity of the gold. The melting point of gold as we know is 1947.9741 °F, but it is seen that depending on how many and how much impurities there are in the bar, this temperature will actually fluctuate. The purer the gold, it will melt closer to the exact temperature.
7. Once the gold is properly tested, the gold is now actually ready to be poured into a new gold brick.
8. Now the gold bar will be set aside to cool as it is poured into the mould.
9. For smaller lots and other types of precious metals, other tests are available.

During the melting process, in the induction furnace, no harmful pollutants are released, and throughout the furnace, induction heating spreads efficiently, allowing the heat to be absorbed efficiently by scrap. The Induction Furnace speeds up the gold-melting process of scrap metals, which in turn increases the speed of recycling them.

The principles of reclaiming industrial products through ore-dressing applications are not limited to one industry. In many plants, the reclamation of otherwise waste products is the difference between profit and loss. There are examples where “Sub-A” Flotation is used to recover naphthalene from coke cooling tower water. Gold is recovered by Jigs and Flotation from slag and waste in refining operations.

1.3, For Jewellery Casting

The majority of the jewellery in the market are cast at the industrial level; gold melting equipment is required to cast pieces of jewellery or meaning that some sophisticated machines, like the one shown below:

A great, modern gold melting equipment and jewellery-casting machine must have the following features:

• Its melting time must be fast, usually between 3 and 5 minutes.
• It has inert gas protection, using either Nitrogen or Argon.
• It has a pressurised vacuum casting which prevents oxidation and porosity but improves the casting’s density.
• Possesses a temperature control that meets the casting requirement.
• It has an Omni-bearing auto diagnosis device that analyses each step of the procedure to reduce machine failure.
• Be labour-saving because it requires a few numbers of gold workers, and they can use the equipment without serious supervision (easy to use for everyone).

1.4, For Industrial Applications

Of all the minerals that are mined from the Earth core, none is more useful and valuable than gold. A diversity of special properties is what makes its usefulness. Gold does not tarnish, conducts electricity, is very easy to work, can be hammered into thin sheets, can be drawn into wire, alloys with many other metals, can be melted and cast into highly detailed shapes, has a wonderful colour and a brilliant luster. Gold is actually a memorable metal that occupies a special place in the human mind.

Jewellery:

About 79% of gold consumed each year is made into jewellery. Jewellery is the most common way gold reaches consumers and has been a primary use for the metal in various cultures.

Finances and Investing:

Because gold is highly valued and so rare, this precious metal has for at least 6,000 years and makes a natural currency. To invest or hold in gold, one of the most common ways is in gold bars, gold coins, also bullion of gold.

Electronics and Computers:

Gold is known as a highly efficient conductor that is capable of carrying tiny electrical charges. Because of this property, in almost all electronic devices, a small amount is found, including televisions, GPS units, cell phones, and more. Because gold is such an excellent and efficient conductor of electrical charges, it is also often found in the laptop as well as desktop computers to transfer electronic information quickly.

Dentistry and Medicine:

Gold makes for the best crowns, bridges, orthodontic appliances and fillings because the metal is chemically inert, easy to insert and nonallergenic. In the medical field, small amounts of isotopes of gold are used in certain diagnosis and radiation treatments.

Aerospace:

In the aerospace industry, where effective and reliable technologies are key to survival, an essential role is played by gold. Gold is actually used to conduct electricity, coat the insides of space vehicles to protect people inside from infrared radiation and heat and lubricate mechanical parts.

Medals and Awards:

As gold is a highly esteemed precious metal, it makes a natural appearance in awards, religious statues and crowns. Because of its unparalleled rarity and beautiful qualities, gold is considered one of the highest symbols of status. In everything from Olympic medals to Academy Awards, gold holds a permanent place of value in humanity’s eyes and is recognized for its admirable qualities.