Mining method:

According to the investigation, jaw crushers are mostly used for coarse crushing, standard cone crushers are used for medium crushing, and short-headed cone crushers and roller crushers are used for fine crushing. Most small and medium-sized gold concentrator adopts two-stage and one-closed circuit ore crushing process, while large gold concentrator adopts three-stage and one-closed circuit ore crushing process.

In order to improve the mineral processing capacity and tap the potential of equipment, the ore crushing process was reformed, and the utilization coefficient of the mill was improved. The main measures taken are more crushing and less grinding to reduce the grinding particle size.

Extended data:

Refractory gold resources can generally be divided into three main types:

The first kind is gold ore with high arsenic, carbon and sulfur content. This type of arsenic content is above 3%, carbon content is 1-2%, and sulfur content is 5-6%. The leaching rate of gold is generally 20-50% by conventional cyanidation process, and a large amount of Na2CN is needed.

The second is gold-bearing ore, in which gold is wrapped in gangue minerals and harmful impurities, showing fine particles and microscopic morphology. The content of metal sulfide in this type is low, about 1-2%, and the micro-gold embedded in gangue mineral crystals accounts for 20-30%. The recovery rate of gold by traditional cyanidation or flotation is very low.

The third kind of gold ore is closely related to gold, arsenic and sulfur. Its characteristic is that arsenic and sulfur are the main carrier minerals of gold, and the arsenic content is medium. Using a single cyanide gold extraction process, the gold leaching index of this type of ore is low If gold is enriched by flotation, a higher recovery index can be obtained, but it is difficult to sell because the arsenic content exceeds the standard. ?

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