Recovery method and recovery device for valuable metals in scrap copper electrolysis anode mud
A recovery method and recovery device technology, applied in the field of recovery method and recovery device for valuable metals in waste copper electrolysis anode slime, capable of solving complex components of waste copper electrolysis anode slime, threats to the ecological environment and human health, and energy consumption Higher problems, to achieve the effect of low consumption of process reagents, high direct recovery rate, and high copper leaching rate
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Embodiment 1
[0091] Put the dried materials into the rotary kiln to ventilate the air for drying and oxidative roasting, the roasting temperature is 700°C, the roasting time is 1h, and then air-cooled. The obtained calcined sand was stirred for 1 hour at a sulfuric acid concentration of 150g / L, a liquid-solid ratio of 3:1, and a temperature of 70°C, and the leaching solution and leaching slag were obtained by filtration. After analysis, the copper concentration of the leaching solution was 48g / L, and the leaching rate was 98.9%. The current density is 450A / m 2 A period of swirl electrowinning is carried out under the following conditions to obtain a copper concentration of 35g / L in the solution I after electrowinning; 2 Carry out two-stage swirl electrowinning to obtain a copper concentration of 15g / L in the electrolytic liquid II; 2 Under three-stage swirl electrowinning, the concentration of copper in solution III after electrowinning was 1.0 g / L. Distill the leaching residue at NaOH c...
Embodiment 2
[0093] Put the dried material into the rotary kiln to ventilate the air for drying and oxidative roasting, the roasting temperature is 650°C, the roasting time is 1.5h, and then air-cooled. The obtained calcined sand was stirred for 1 hour at a sulfuric acid concentration of 180g / L, a liquid-solid ratio of 2.5:1, and a temperature of 70°C, and the leaching solution and leaching residue were obtained by filtration. After analysis, the copper concentration of the leaching solution was 45g / L, and the leaching rate was 95.5%. The current density is 480A / m 2 A period of swirling electrowinning was carried out under the following conditions to obtain a copper concentration of 33g / L in the solution I after electrowinning; 2 Carry out two stages of swirl electrowinning to obtain a copper concentration of 12g / L in the electrolytic liquid II; 2 Three-stage swirl electrowinning was carried out under the following conditions, and the copper concentration of liquid III after electrowinnin...
Embodiment 3
[0095] Put the dried material into the rotary kiln to ventilate the air for drying and oxidative roasting, the roasting temperature is 600°C, the roasting time is 2.0h, and then air-cooled. The obtained calcined sand was stirred for 1 hour at a sulfuric acid concentration of 200g / L, a liquid-solid ratio of 2.5:1, and a temperature of 70°C, and the leaching solution and leaching residue were obtained by filtration. The copper concentration of the leaching solution was analyzed to be 43g / L, and the leaching rate was 91.6%. The current density is 500A / m 2 A period of swirl electrowinning is carried out under the following conditions to obtain a copper concentration of 30g / L in the solution I after electrowinning; 2 Carry out two-stage swirl electrowinning to obtain a copper concentration of 10g / L in the electrolytic liquid II; 2 Three-stage swirl electrowinning was carried out under the following conditions to obtain a copper concentration of 0.5 g / L in solution III after electr...
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