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Second Case of all-mud cyanide gold extraction -- New Occide

2020-09-07 11:20

Introduction：Second Case of all-mud cyanide gold extraction -- New Occidental Gold Mine The ore at New Occidental consists of fine gold silicified SLATE and sandstone, containing gold 8.7g/t, approximately 1 percent chalcopyrite and 1-2 per cent magnet

Second Case of all-mud cyanide gold extraction -- New Occidental Gold Mine

The ore at New Occidental consists of fine gold silicified SLATE and sandstone, containing gold 8.7g/t, approximately 1 percent chalcopyrite and 1-2 per cent magnetite.

In order to reduce the consumption of cyanide and improve the recovery rate of gold, in addition to carefully control the alkalinity of cyanide leaching, lead oxide was added to cyanide leaching.As shown in figure 5-27, the processing capacity is 8000 tons/month, ore reduction to 9.5 mm, add lime, cyanide and lead oxide between two closed circuit grinding process of grinding and 90% -200 mesh, the bottom of the graded overflow after enrichment flow series four DE slot in Florida, stirring 30 hours of cyanide leaching pulp thickening the overflow product bottom flow back washing lotion after grinding on the homework.
The overflow during leaching contains 0.06% NaCN and 0.007%CaO.The leaching agent consumption is NaCN1.14kg/ton of raw ore, CaO1.4kg/ton of raw ore, and PbO 300g/ton of raw ore.Grinding pulp thickening the overflow solution (including gold) by clarifying, deoxidization and Zinc powder replacement gold deposits and gold output after roasting and oxidant for smelting, output high copper and gold ingots, with it sulfur melting to remove a number of copper, output gold 86%, silver4% and base metals (mainly copper) 10% of the gold ingot quality.The recovery rate of gold is 91%.Although the factory has stopped production, its production experience has certain practical significance.

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