Abstract
In the process of cyanidation of gold concentrate from a smelting company, the content of copper and zinc in the liquid gradually increased. In production, acidizing process is used to treat the lean solution from high copper concentrate, and mixed products containing copper, zinc and other metals are produced. In this paper, the pH value of zinc precipitation is 6.0 and the pH value of copper precipitation is 3.0 through theoretical calculation and experiment. The separation of copper and zinc in the lean solution is realized successfully. The zinc product with grade of 42.97% and the copper product with grade of 58.33% are produced.
Highlights
In the production process of a smelting company, the incoming gold concentrate enters the pre-leaching flotation process after grinding
The gold concentrate is divided into high copper concentrate, high sulfur concentrate and low sulfur concentrate
The leaching solution is replaced by zinc powder, and the resulting lean solution returns to the cyanidation system
Summary
In the production process of a smelting company, the incoming gold concentrate enters the pre-leaching flotation process after grinding. The gold concentrate is divided into high copper concentrate, high sulfur concentrate and low sulfur concentrate. The three products respectively enter the corresponding cyanidation leaching system. The leaching solution is replaced by zinc powder, and the resulting lean solution returns to the cyanidation system. In the process of leaching, the copper and zinc in the lean liquor increase gradually. The lean liquor produced from high copper concentrate is treated by acidification to produce mixed products containing copper, zinc and other metals
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