Chemical selection - water metallurgy gold extraction process
The cyanidation gold extraction process is the main method for extracting gold from ores or concentrates. The cyanidation gold extraction process includes: cyanide leaching, washing and leaching of the leaching slurry, extraction of gold from cyanide or cyanide pulp, and smelting of the finished product. Gold mines conventional plant of basic cyanide gold extraction process using two types, one is based on gold extraction process thickener continuous countercurrent washing, recovery of gold cementation with zinc powder, a so-called conventional cyanidation (CCD method and CCF The other method is a non-filtered cyanide carbon slurry process (CIP method and CIL method) which does not require filtration and washing, and uses activated carbon to directly adsorb gold from cyanide pulp.
The conventional cyanidation gold extraction process is divided into two types according to the treatment materials: one is a cyanide plant that processes flotation gold concentrate or treats amalgam and re-selects tailings. The other is to treat muddy oxidized ore, using a full mud mixing cyanide gold extraction plant.
2, amalgamation method to withdraw gold
The amalgamation process is an ancient gold extraction process that is both simple and economical and is suitable for the recovery of coarse-grained monomer gold. This method is still used in many gold mines in China. With the development of gold production and the advancement of science and technology, the gold extraction process of amalgamation has been continuously improved and improved. Due to the increasingly strict environmental protection requirements, some mines have eliminated the amalgamation operation and replaced them with gold extraction processes such as re-election, flotation and cyanidation.
In the gold production, the amalgamation process still has an important role in the gold extraction process, and there are application examples at home and abroad. The key to the amalgamation process is how to take protective measures to eliminate mercury pollution.
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