Scrap Gold Refiners

There are many scrap gold refiners in USA. Scrap is the used parts of gold and the places the scraps are recycled are called scrap gold refiners. When the gold prices are high, scrap is valued more and recycled consistently to make pure gold.

Scrap gold refiners normally categorize scrap into seven groups. They are called industrial scraps, hallmarked scrap, clean scrap, lemel, sweeps, and polishing. Industrial scrap is wastage from industrial plating process while hallmarked scrap is taken from jewelry that have quality mark. Clean scraps are the cut outs from gold alloys. Lemel is unclean scraps from jewelry factories while sweeping the floors of jewelry factories is the way of collecting sweeps. Polishing scraps come when polishing gold materials. Mops, buffs and other materials taken for polishing of gold items are this type of scrap.

The scrap is also named process scrap, as they are produced during the general process of jewelry manufacturing. Whenever the gold prices are high, gold scrap recycling also go high and channels recycled gold into the market in great bulk.

Large gold refineries use two major systems to recycle scrap. The first is called Miller Process in which chlorine is taken as the purifying solvent. The second method 'electrolysis' has been widely used since 1870. By using chlorine, gold scrap can be recycled purifying up to 995 for thousands parts while electrolysis method can refine to maximum fineness, which is 999.9 per thousands parts.

Chlorine system is the main method used by scrap gold refiners traditionally to recycle gold, as it is faster than the other methods. However, as the monetary value of the bars made with electrolysis methods is high, many refiners have now modernized to the electrolysis method within the last four decades.

In gold scrap refiners, they now use the solvent extraction technique. In small and medium gold scrap refineries a process called aqua regia is in use. In this method, the aqua regia acid is in use to dissolve gold scrap precipitating them separately to pure gold by using chemicals such as ferrous sulphate and sodium bisulphate. The purity of this type of recycling is as high as 99.99 percent.

The quality of scrap related recycling gold entirely depends on the development of the technologies that is related with the industry. Many refiners produce low quality gold because of their bygone technologies. London Bullion Market Association has highlighted about sixty scrap gold refineries that produce good quality of gold by refining. The largest gold scrap refinery is Rand Refinery and it is in South Africa.

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