A method for comprehensive recovery of valuable metals from copper anode slime
A technology of copper anode slime and valuable metals, which is applied in the direction of improving process efficiency, etc., to achieve the effects of low production cost, reduced processing capacity, and stable technical indicators
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Embodiment 1
[0025] (1) Add copper anode slime to the selenium-containing acidic solution, add 30% concentrated hydrochloric acid to carry out leaching once, control the liquid-solid ratio to 2:1, the reaction temperature is 70°C, the chloride ion concentration is 120g / L, and the reaction time is 3 Filtrate after 1 hour, the primary leaching liquid contains Cu25.9g / L, Sb25.6g / L, Bi 14.6g / L, Te0.03g / L, Se2 SO 4 The leaching rates of Cu, Sb, and Bi in copper anode slime after two-stage leaching are 56%, 88%, and 90% respectively; according to the quality of the secondary leaching slag and concentrated sulfuric acid Ratio is 0.9, adding 98% concentrated sulfuric acid to slurry for 0.5 hours, then adding the secondary leaching slag into the rotary kiln for sulfate roasting, the roasting temperature is 500-700 °C, and the roasting time is 2 hours; the produced calcined sand contains selenium 0.06%; the flue gas is absorbed by the three-stage absorption tower, and after stirring for another 10 h...
Embodiment 2
[0029] (1) Add copper anode slime to the selenium-containing acidic solution, add 30% concentrated hydrochloric acid to carry out leaching once, control the liquid-solid ratio to be 3:1, the reaction temperature is 70°C, the chloride ion concentration is 130g / L, and the reaction time is Filter after 4 hours, Cu34.1g / L, Sb28.5g / L, Bi 15.0g / L, Te0.02g / L, Se2 SO 4 The leaching rates of Cu, Sb, and Bi in copper anode slime after two-stage leaching are 60%, 90%, and 91%, respectively; according to the quality of the secondary leaching residue and concentrated sulfuric acid Ratio of 0.8, adding 98% concentrated sulfuric acid for slurrying for 1 hour, then adding the secondary leaching residue into the rotary kiln for sulfate roasting, the roasting temperature is 500-700 ° C, and the roasting time is 2.5 hours; the flue gas is passed through the absorption tower through three After stirring for another 12 hours at room temperature, filter to obtain crude selenium and selenium-contain...
Embodiment 3
[0033] (1) Add copper anode slime to the selenium-containing acidic solution, add 30% concentrated hydrochloric acid to carry out leaching once, control the liquid-solid ratio to be 5:1, the reaction temperature is 80°C, the chloride ion concentration is 140g / L, and the reaction time is Filter after 4 hours, Cu29.3g / L, Sb26.7g / L, Bi 15.5g / L, Te0.03g / L, Se2 SO 4 is 340g / L, and chloride ion is 24.5g / L; after two stages of leaching, the leaching rates of Cu, Sb, and Bi in copper anode slime are: 58%, 92%, and 90% respectively; according to the quality of the secondary leaching residue and concentrated sulfuric acid Ratio of 0.8, adding 98% concentrated sulfuric acid for slurrying for 1 hour, then adding the secondary leaching residue into the rotary kiln for sulfate roasting, the roasting temperature is 500-700 ° C, and the roasting time is 2.5 hours; the flue gas is passed through the absorption tower through three After stirring for another 12 hours at room temperature, filter ...
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