Method for recovering valuable metals from copper-cadmium slag of zinc hydrometallurgy
A valuable metal, hydrometallurgical zinc smelting technology, applied in the improvement of process efficiency, instruments, optics, etc., can solve problems such as pollution, waste of resources and the environment, and achieve the effects of short process flow, high current efficiency, and efficient recovery
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[0024] Example 1
[0025] Such as figure 1 As shown, the method for recovering valuable metals from the slag of hydrometallurgical zinc, copper and cadmium, the specific steps are as follows:
[0026] (1) First, the copper cadmium slag (the copper cadmium slag produced in the zinc smelting process of a hydro-zinc smelter in Yunnan is selected, and its composition contains Cu26.52wt%, Fe2.53wt%, Cd4.55wt%, Zn3.54wt% ) Dry and dehydrate, after drying, finely grind to a particle size of 100 mesh to obtain the copper-cadmium slag and add it to the sulfuric acid solution, perform one-time leaching to obtain the cadmium-rich solution and one-time leaching residue; the specific process is: solid-liquid ratio of copper-cadmium slag and sulfuric acid solution 1:7g / mL, leaching for 3h at a temperature of 60℃, the concentration of sulfuric acid solution is 60g / L;
[0027] (2) The primary leaching residue obtained in step (1) is used as zinc electrowinning waste liquid (the zinc electrowinnin...
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[0033] Example 2
[0034] Such as figure 1 As shown, the method for recovering valuable metals from the slag of hydrometallurgical zinc, copper and cadmium, the specific steps are as follows:
[0035] (1) First, the copper-cadmium slag (the copper-cadmium slag produced in the zinc smelting process of a hydro-zinc smelter in Yunnan is selected, and its composition contains Cu34.52wt%, Fe1.03wt%, Cd5.94wt%, Zn3.87wt% ) Dry and dehydrate, after drying, finely grind to a particle size of 200 mesh to obtain copper-cadmium slag and add it to sulfuric acid solution, perform one-time leaching to obtain cadmium-rich solution and one-time leaching residue; the specific process is: solid-liquid ratio of copper-cadmium slag and sulfuric acid solution 1:5g / mL, leaching for 2h at a temperature of 70℃, the concentration of sulfuric acid solution is 40g / L;
[0036] (2) The primary leaching residue obtained in step (1) is used as zinc electrowinning waste liquid (the zinc electrowinning waste liqu...
Example Embodiment
[0042] Example 3
[0043] Such as figure 1 As shown, the method for recovering valuable metals from the slag of hydrometallurgical zinc, copper and cadmium, the specific steps are as follows:
[0044] (1) First, the copper cadmium slag (the copper cadmium slag produced in the zinc smelting process of a hydro-zinc smelter in Yunnan is selected, and its composition contains Cu51.36wt%, Fe0.97wt%, Cd3.69wt%, Zn6.97wt% ) Dry and dehydrate, after drying, finely grind to a particle size of 200 mesh to obtain copper-cadmium slag and add it to the sulfuric acid solution, perform one-time leaching to obtain cadmium-rich solution and one-time leaching residue; the specific process is: solid-liquid ratio of copper-cadmium slag and sulfuric acid solution 1:6g / mL, leaching for 2.5h at 65℃, the concentration of sulfuric acid solution is 50g / L;
[0045] (2) The primary leaching residue obtained in step (1) is used as zinc electrowinning waste liquid (the zinc electrowinning waste liquid includes...
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