A method for enriching and opening impurities from zinc hydrometallurgy leaching solution by using zinc powder purification slag
A technology of hydrometallurgy and leaching solution, which is applied in the field of non-ferrous metallurgy, can solve problems such as the difficulty in effectively utilizing zinc powder purification slag, and achieve the effects of wide application, high recovery rate, and low cost
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Embodiment 1
[0024] at 50m 3 Add 2.1 tons of zinc powder purification slag (total zinc: 56.45%, metal zinc: 35.78%, copper: 0.41%, cadmium: 4.35%, nickel: 0.15%, cobalt: 0.22%) and 8.5m 3 water, stir and slurry evenly, then heat up to 60°C. Then, add the acidic leaching solution (pH=2.9, zinc: 142g / L, copper: 854mg / L, cadmium: 466mg / L, nickel: 15mg / L, cobalt: 36mg / L) which will be preheated to 60°C and slowly add to the In the reactor, the feeding speed is 4.5m 3 / h. After the feeding was completed, the heat preservation reaction was continued for 70 min. After the reaction was finished, the filter residue and filtrate were collected by filtration, and the concentrations of copper, cadmium, nickel, and cobalt in the resulting filtrate were reduced to <0.1mg / L, 28.2mg / L, 4.7mg / L, and 2.3mg / L respectively, which greatly reduced the The difficulty of subsequent deep purification. At the same time, the contents of these valuable elements in the filter residue increased to 5.63%, 8.85%, 0....
Embodiment 2
[0029] at 50m3 Add 4.5 tons of zinc powder purification slag (total zinc: 56.45%, metal zinc: 35.78%, copper: 0.41%, cadmium: 4.35%, nickel: 0.15%, cobalt: 0.22%) and 4.5m 3 water, stir and slurry evenly, then raise the temperature to 45°C. Then, add the acidic leaching solution (pH=2.9, zinc: 142g / L, copper: 854mg / L, cadmium: 466mg / L, nickel: 15mg / L, cobalt: 36mg / L) which will be preheated to 55°C and slowly add to the In the reactor, the feeding speed is 6.5m 3 / h. After the feeding was completed, the insulation reaction was continued for 50 min. After the reaction was finished, the filter residue and filtrate were collected by filtration, and the concentrations of copper, cadmium, nickel, and cobalt in the resulting filtrate were reduced to <0.1mg / L, 2.6mg / L, 1.6mg / L, and 0.4mg / L respectively, which greatly reduced the The difficulty of subsequent deep purification. At the same time, the contents of these valuable elements in the filter residue increased to 2.64%, 3.85%...
Embodiment 3
[0034] at 50m 3 Add 3.2 tons of zinc powder purification slag (total zinc: 56.45%, metal zinc: 35.78%, copper: 0.41%, cadmium: 4.35%, nickel: 0.15%, cobalt: 0.22%) and 6m in the reactor. 3 water, stir and slurry evenly, then heat up to 50°C. Then, add the acidic leaching solution (pH=2.9, zinc: 142g / L, copper: 854mg / L, cadmium: 466mg / L, nickel: 15mg / L, cobalt: 36mg / L) which will be preheated to 55°C and slowly add to the In the reactor, the feeding speed is 3.5m 3 / h. After the feeding was completed, the insulation reaction was continued for 60 min. After the reaction, the filter residue and filtrate were collected by filtration, and the concentrations of copper, cadmium, nickel, and cobalt in the resulting filtrate were reduced to <0.1mg / L, 6.8mg / L, 3.4mg / L, and 0.8mg / L respectively, which greatly reduced the The difficulty of subsequent deep purification. At the same time, the contents of these valuable elements in the filter residue increased to 3.26%, 4.78%, 0.31%, an...
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