Old Gold Refinery Tools
Gold's value is based in part on its rarity and explains renewed interest in refining old gold. Old gold usually refers to broken or disused jewelry, but such is the value of the metal that it is commercially viable to reclaim and refine even the small amount of gold used in computers.
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Simplicity
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The Simplicity is a system made by a New Jersey company for small-scale, old gold refinement. The main component is a vessel with a ceramic cell. You use it in conjunction with a battery charger or rectifier. You put your old gold and scrap gold into the vessel, then fill it with a special salt water that dissolves the metal. You add a white powder and the gold solidifies and drops to the bottom in fine particles.
Gold Refinery Kit
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If you want to refine old gold on a commercial scale, you can buy a whole kit of equipment and begin your own gold refinery company for less than $2,000. The kit includes a gold refining system, an electronic tester to tell you the karat of your gold, a battery charger and an electric melting furnace. There are also crucibles, stirring rods, flux, an ingot mold and gloves in the kit, as well as a video and written instructions.
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Cupel
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For larger scale old gold refining operations, you might want to invest in your own furnace. According to gold-mining and assaying expert John Arthur Phillips, gold was historically extracted from lead using a cupel. A cupel is a concave, egg-shaped vessel made of bone ashes and wood ashes. As part of a furnace, it had a clay trunk attached to it, called a muffle, that helped to heat up the cupel in a controlled way.
Rabble Roaster
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According to gold ore processing authority Mike D. Adams, the single Edwards rabble roaster was used by many gold processing companies, such as Giant Yellowknife Mines Limited. A rabble roaster, as the name suggests, is a furnace that has a series of horizontally stepped hearths. Each of the hearths has a stirring rabble. In other words, a straight or bent iron bar to stir the molten metal and liberate the valuable gold.
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References
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