Adopting mixed flotation-concentrate regrinding process can reduce the grinding cost, and be easy to manage. Application of new non-toxic flotation reagents is efficient and environmental protection.
The silver flotation process of Xinhai includes three kinds of methods: flotation, flotation & gravity separation, flotation & cyaniding. While the flotation & cyaniding method is the most important process among the three. The silver concentrate can get in the process of flotation, then regrinding to the next process including cyaniding and leaching, countercurrent washing, zinc powder replacement, and silver ingot can finally get after the last process of electrolytic dissociation. Thus the process is characterized by high recovery and economic benefits.
The principle of alluvial gold mining beneficiation is to maximize the recovery rate of gold and the associated heavy minerals from gangues first and then separate gold from the associated heavy minerals by joint mining solutions such as gravity separation, flotation, amalgamation, magnetic separation, and electrostatic separation.
The process of heap leaching gold from gold ore is to crush low-grade gold ore to a certain size (or granulate), and pile it on a leak-proof bottom mat paved with asphalt, concrete or plastic, and use low-concentration cyanide, alkaline The solution, non-toxic solvent or dilute sulfuric acid and other solutions are sprayed on the mine pile to dissolve the gold, and the gold-containing solution is infiltrated from the mine pile, and then the gold is recovered by methods such as activated carbon adsorption or zinc powder replacement precipitation.
The purpose of the placer gold beneficiation process is to recover gold and various associated heavy minerals from gangue minerals as much as possible, and then use combined operations such as gravity separation, amalgamation, magnetic separation and electrostatic separation to remove gold and various associated heavy minerals. The heavy minerals are separated from each other to achieve the purpose of comprehensive recovery.
The gold ore heap leaching process is to crush low-grade gold ore to a certain size (or granulate), and pile it on a leak-proof bottom mat paved with materials such as asphalt, concrete or plastic, and use low-concentration cyanide, alkaline solution, Solutions such as non-toxic solvents or dilute sulfuric acid are sprayed on the ore pile to dissolve the gold, and the gold-containing solution is infiltrated from the ore pile, and then the gold is recovered by methods such as activated carbon adsorption or zinc powder replacement precipitation.
Gold mine CIP production line process is a non-filtered cyanide carbon slurry gold extraction process that uses activated carbon to directly adsorb and recover gold from cyanide pulp, including preparation of leaching pulp, cyanide leaching, activated carbon adsorption, and gold-loaded carbon desorption , Gold mud is obtained by electric shock, gold removal charcoal is recycled, and the processing of leaching pulp is seven operation stages.
The CIL (Carbon In Leach) leaching process, that is, gold extraction by carbon leaching, is a process in which activated carbon is added to the pulp and the leaching and adsorption of gold are carried out at the same time. It simplifies the cyanidation in the CIP (Carbon In Pulp) process. The two steps of leaching pulp and activated carbon adsorption are one step, which reduces the loss while reducing management costs. Compared with the traditional CCD process, it saves 66% of the investment cost and is the preferred process for modern gold ore beneficiation.
Flotation is the most extensive beneficiation method used by gold concentrators to process rock gold ore. It is often used to process gold-bearing sulfide minerals with high floatability. The flotation process can maximize the concentration of gold in sulfide minerals, the tailings can be directly discarded, and the cost of beneficiation is low. 80% of my country's rock gold mines use this process for beneficiation.