macarthur cyanide process for silver extraction in kenya

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Diamond reserves and production of South Africa are in the front rank of the world. Large-scale development and utilization of diamonds result in production of a large number of diamond wastes. Resource utilization of diamond waste can turn waste into tre

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Cyanide process also called Macarthurforrest Process method of extracting silver and gold from their ores by dissolving them in a dilute solution of sodium cyanide or potassium cyanide The process was invented in 1887 by the Scottish chemists John S MacArthur Robert W

The precipitate is further refined eg by smelting to remove the zinc and by treating with nitric acid to dissolve the silver The cyanide process was developed 1887 by J S MacArthur and others in Glasgow Scotland It is now the most important and widely used process for extracting gold from ores

Mar 02 2016 · Leaching Character The gold cyanidation process has been the universal gold and silver extraction process used since its development by MacArthur and Forrest in 1889

The MacArthurForrest cyanidation process is still used today for extracting gold and silver from lowgrade ore and tailings albeit with minor modifications Since the Baia Mare dam failure

Jan 01 1989 · Whether the patents should be proved valid or not there can be no question that the MacArthurForrest process has been of the utmost ser vice to the Witwatersrand mining in dustry 12 The Great Cyanide Case as it be came known was begun at the High Court in Pretoria in February 1896 figure 3

Silver is extracted from the oreargentite A g 2 S The process of extraction of silver is called as cyanide process as sodium cyanide solution is used The ore is crushed concentrated and then treated with sodium cyanide solution This reaction forms sodium argento cyanide N a A g C N 2 1 A g S 4 N a C N ⇌ 2 N a A g C N 2 N a 2 S

The precipitate is further refined eg by smelting to remove the zinc and by treating with nitric acid to dissolve the silver The cyanide process was developed 1887 by J S MacArthur and others in Glasgow Scotland It is now the most important and widely used process for extracting gold from ores

The cyanide process established in South Africa involved removing gold and silver from host rock by dissolving them in a dilute solution of cyanide precipitating them with zinc then vaporizing the zinc leaving behind the gold and silver

Gold processing Gold processing Mining and concentrating The nature of the ore deposit determines the mining and mineral processing techniques applied Oxide ore deposits are frequently of such low grade eg 3 to 10 parts per million that extensive mineral processing cannot economically be justified In this case they are merely shattered by explosives and then piled into heaps for