The ball mill, in closed circuit with a classifier, is fed with ore, cyanide, lime, and carbon as charcoal. The classifier overflow is thickened and then agitated. The gold is dissolved by the cyanide solution and then its soluable gold cyanide compound is absorbed by the finely divided charcoal. Flotation then recovers the charcoal.
The caustic starch is prepared as follows: To 40 parts of water kept boiling in a drum by the use of steam, is slowly added one part of starch made into a slurry with four parts of cold water. The mixture is then boiled for ten minutes, after which is added half a part of caustic soda dissolved in water.
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The removal of silver from its ores also uses the sodium cyanide process, just like gold. Gold Leaching. Leaching is used in situations where gold cannot be concentrated for smelting. The most common process used in the cyanide process. However, a type of leaching known as thiosulfate leaching is the best on gold ores with highly soluble copper value.
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Cyanide free gold processing technology, As the name implies, no longer use highly toxic cyanide. The process uses a safer and less harmful reagent thiosulfate instead of cyanide. In some mines in countries or regions where cyanide is strictly prohibited, this technology has broad application prospects.
The three commonly used gold separation processes are: cyanidation gold separation technology, flotation gold technology, and gravity separation gold technology. 2.Gold beneficiation method Cyanide gold selection process. The cyanide gold separation process is one of the main methods for extracting gold from gold ore.
Adsorption: Adding activated carbon to the fully leaching pulp, and the activated carbon will absorb the gold in the cyanide pulp then become the gold bearing carbon. The whole adsorption operations carried out in the adsorption tank . There are various types of adsorption tanks.
June 10, 2020
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