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  • Extraction of Gold

    Extraction of Gold

    After chlorination of the gold, preferably with chlorine under pressure, the metal is precipitated by hydrogen sulphide or ferrous sulphate, or the gold is precipitated by , and recovered by of the charcoal. Direct generation of the chlorine in …

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  • CN102002600A - Environmentally-friendly chlorine water ...

    CN102002600A - Environmentally-friendly chlorine water ...

    The invention belongs to the field of wet metallurgy, and discloses an environmentally-friendly water - for leaching from water for -containing waste or waste residue and removing toxic substances produced in the - to purify air so as to fulfill the purpose of environmentally-friendly .

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  • Processing, smelting and refining gold | World Gold Council

    Processing, smelting and refining gold | World Gold Council

    The process uses gaseous chlorine to extract impurities when gold is at melting point impurities separate into a layer on the surface of the molten purified gold. The Miller process is rapid and simple, but it produces gold of only about 99.5 percent purity. The Wohlwill process increases purity to about 99.99 percent by electrolysis. In this process, a casting of impure gold is lowered into an electrolyte solution …

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  • Plattners Process - ChestofBooks.com

    Plattners Process - ChestofBooks.com

    204. The of known as Plattners chlorination , which is that described in the text, originated in Europe, and was first introduced here by G. F. Deetken, M. E., at Grass Valley, in Nevada County.. In 1866, Mr. Deetken having removed from Grass Valley, the operators who succeeded him were suddenly confronted by a difficulty in the treatment of the concentrations ...

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  • Extraction of gold, Occurrence of gold, Plattners ...

    Extraction of gold, Occurrence of gold, Plattners ...

    : Occurrence of . is mainly found in the native state either like vein , placer or alluvial . It is present to a small extent in the combined state like sulphide as well, telluride and arsenosulphide. It is known as king of the metals.

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  • Gold Recovery Correctly : 12 Steps - Instructables

    Gold Recovery Correctly : 12 Steps - Instructables

    Recovery Correctly: I will detail a SAFE of turning old electronic parts into little round lumps of pure . There are many tutorials that claim to offer methods of recovery such as "Cupellation"*. These processes are DANGEROUS and put the user at the…

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  • chlorination - Wiktionary

    chlorination - Wiktionary

    chemistry The act or of chlorinating something especially, the addition of to water to purify it, and a for the of by exposure of the auriferous material to gas

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  • GENERAL PRINCIPLESSSS AND PROCEOCEOCESSESSESSES …

    GENERAL PRINCIPLESSSS AND PROCEOCEOCESSESSESSES …

    ii In of silver , silver is extracted as cationic complex. iii Nickel is purified by zone refining. iv Zr and T i are purified by van Arkel method. 16. In the of aluminium by Hall-Heroult , purified Al 2 O 3 is mixed with CaF 2 to i lower the melting point of Al 2 O 3. ii increase the conductivity of ...

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  • The Chlorination of Gold Ores. - Digitised Collections

    The Chlorination of Gold Ores. - Digitised Collections

    chlorine or chlorine compressed at more than four atmo- spheres, or chlorine evolved by electrolysis they also aimed at overcoming the precipitation of any gold within the ore by the use of of , and the subsequent precipita-

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  • Gold processing - Refining | Britannica

    Gold processing - Refining | Britannica

    The processing of gold scrap varies not only with the gold content but also with the amenability of the gold in the scrap to extraction. Thus, the bulk of the gold may be recovered by leaching techniques using or and the residue may then be …

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