Flotation is the most widely used ore beneficiation method for processing rock gold mine. It is commonly used to treat sulfide minerals gold ore with high floatability. The flotation process can maximize the enrichment of gold into sulfide minerals, tailings can be directly discarded. The cost of the mineral beneficiation processing is low. 80% of China's rock gold mines are selected by this process.
The gold mine flotation process is suitable for the treatment of sulfide-bearing gold-bearing quartz vein ore and polymetallic gold-bearing sulfide ore and carbon (graphite) -containing ore with fine gold particles and high floatability.
Gold mine flotation process
The flotation of gold minerals generally adopts a grinding-flotation process. For the ore with uneven grain size, the stage-grinding process can be used. In China, a one-stage grinding-flotation process is generally used to achieve the enrichment of useful minerals.
Grinding fineness requirements of gold mines
For the gold that encapsulated in the sulfide mineral, the requirement of mines fineness is only dissociating sulfide ore monomer. However, for the gold that is associated with the gangue, the fineness needs to reach the monomer of gold dissociation. Moreover, the fineness of grinding of a certain mineral need to be determined by experiment.
Pulp concentration requirements of gold mine flotation process
The principle of gold mine flotation: The more concentrated pulp often apply for flotation of large density, coarse grain minerals. Conversely, when flotation of small density, fine grain size and slime, thinner pulp would be used. Thicker pulp is used for rough flotation, which can guarantee a higher recovery rate. The thinner pulp is used for fine flotation, which could help to improve the quality of the concentrate.
Other process conditions
In addition to the fineness of grinding, the process conditions affecting the gold flotation also include the concentration of the pulp, the amount of the agent, the amount of aeration, and the flotation time, all of which need to be determined by experiments.