Plate amalgamation in primary ore grinding cycle

For the amalgamation of primary gold ore, a variety of equipment can be used for internal or external mercury. Here is a brief description of the advantages and disadvantages of amalgamation in the grinding cycle and some problems to be solved.

In the process of smelting and smelting, the primary ore must first be crushed and ground. This facilitates the convenient removal of the monomer gold (especially coarse gold) that has been dissociated from the ore from the discharge port of the mill. This method only needs to add a mercury-mixing plate to the flow tank in front of the discharge port of the mill, no need to add additional equipment, small investment, simple operation, and part of the gold recovered in advance can accelerate the capital turnover of the plant, and can also prevent Gold particles are overgrown. The early recovery of coarse gold can also shorten the time of the next leaching operation and increase the total recovery rate. Therefore, it was welcomed by the selection plant and widely adopted by most of the selection plants.

However, mercury is a volatile, low-melting metal. In the beneficiation plant where mercury-containing plates are installed (not to mention mercury-gold distillation and smelting sites), indoor air contains high concentrations of mercury. Especially when the indoor temperature is too high or the ventilation is poor, the mercury content in the air above the surface of the mercury board is higher, which is easy to cause chronic mercury poisoning of the operator. And the slurry discharged from the mill flows through the mercury plate, which will wash away some of the mercury on the mercury plate. As the ore dressing process progresses, part of the mercury enters the concentrate; the other part enters the tailings or wastewater and is eventually discharged into the river.

In order to eliminate mercury and protect the environment, one of the development directions of modern gold production is to use re-election instead of amalgamation. For example, many mines in South Africa use re-election equipment instead of amalgam to collect monomer gold. The other is to use a vacuum seal. Equipment or enhanced ventilation, and recovery of mercury from the exhausted mercury vapor and detoxification of the mercury-containing tail gas.

Precipitated Calcium Carbonate

Uses: Can be used as filler in rubber, plastics, paper, paint and ink industries. Widely used in organic synthesis, metallurgy, glass and asbestos production. It can also be used as a medium seeding agent for industrial waste water, a antacid for stomach and duodenal ulcers, a detoxifying agent for acidosis, a SOâ‚‚ eliminating agent in SOâ‚‚-containing exhaust gas, a dairy cattle feed additive and an anti-sticking agent for oil felt . It can also be used as a raw material for tooth powder, toothpaste and other cosmetics.