Gold extraction (method of extracting gold from gold ore)
Gold ore is a precious and scarce resource, but it is frequently used in industry. Gold ore should be extracted through two processes: sorting and smelting. In nature, the existence of gold ore is mostly accompanied by other minerals. In the process of gold ore dressing and smelting, other associated minerals need to be extracted. In the process of industrial gold beneficiation, different refining processes should be adopted according to the different properties of associated minerals.
1. Single flotation This beneficiation process is used to extract gold and process gold ore, which can effectively remove coarse and medium-grained ores. For example, the gold ore is ground into a certain particle size by crushing and grinding equipment, the ore product with a suitable size is put into the flotation machine, sodium carbonate is added as the regulator, xanthate and xanthate are used as the collector, and finally the surface of the mineral is used The difference in water quality of the resource network realizes the separation of minerals and gangues.
Two. Mercury flotation
For ores associated with pyrite and other sulfide ores, mercury should be added to the slurry during the extraction of gold from gold ores. The method of adding mercury to the mill is usually called amalgamation, and the method of amalgamation while grinding can effectively extract gold.
Third, the best selection method that values friends and excellent resources
Gravity separation is the process of separating and extracting gold through the difference in specific gravity between gold ore and other minerals. In the separation process of gold, the greater the specific gravity difference between gold ore and other minerals, the easier the separation process. Typically, when gravity separation is used, sifting, jigging and shakers are used to extract the gold.
Fourth, carbon slurry method
After the gold ore is crushed to a certain extent, the cyanide leaching method is adopted, that is, activated carbon is used as an adsorbent during leaching to increase the leaching rate of gold, and finally the gold ore is used High-temperature Fangyouyou resource *** method to extract gold from gold-loaded charcoal.