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The flotation method is the most widely used ore dressing method in the production of gold. It has high flotation efficiency and can handle fine-grain-dipped ore. For ore with complex composition, the flotation method can get good separation results. Flotation method is often used to treat gold ore containing sulfide minerals with high floatability. The sulfide ore mainly includes sulfide-depleted gold ore (mostly quartz vein type or hydrothermal alteration type), poly sulfide gold ore and polymetallic. auriferous sulfide ore, the flotation process can maximize the enrichment of gold into the sulfide mineral, and lower the beneficiation cost.
Heap leaching of gold refers to the process of building a heap of low-grade gold ore or flotation tailings on the bottom cushion material and circulating spray through sodium cyanide solution to dissolve gold and silver in the ore to form gold-bearing noble liquid to recover gold.Heap leaching method for gold extraction has the advantages of simple process, easy operation, less equipment, less power consumption, less investment, quick effect and low production cost. Heap leaching is used to treat low grade ores of 0.5-3g/t, and the recovery rate of gold can reach 50-80%, or even 90%. Therefore, heap leaching enables the recovery of many small gold mines, low-grade ores, tailings or waste rocks that were previously considered to be of no economic value. Heap leaching is considered to be the most economical method for gold extraction.
Gold CIP (Carbon in Pulp) refers to the process of gold extraction from carbon pulp, which is a hydrometallurgical process of extracting gold through cyanide leaching and activated carbon adsorption.It is Suitable for treating middle and low grade ore (Au 2~5g/t), sulfide bearing or complex gold ore. Gold CIL is a process that improved on the basis of CIP process. The feature of this process is that gold leaching and adsorption are carried out simultaneously.It is Widely used in the treatment of low-grade gold ores or tailings..
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