Method for recovering silver and copper from electric zinc waste slag
A technology of waste slag and electrolytic waste liquid, which is applied in the chemical industry, can solve the problems of low copper grade and low silver content, and achieve the effects of improving silver and copper grade, reducing zinc metal content, and reducing production costs
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Embodiment 1
[0039]a. Add 5000g of the washed electrolytic zinc waste residue to 33L of water to make a slurry, pump it into the reaction tank, and control the slurry density to 1.41×10 3 kg / m 3 , pH=4.5, add 1.35g of sodium sulfide, 1.15g of ethylenediamine phosphate, and react at 45°C for 40 minutes. Then the above-mentioned reactant is pumped into the flotation head tank for standby, and the liquid outlet of the head tank is controlled by a valve, so that the slurry flows into the flotation tank evenly.
[0040] The prepared slurry flows into the roughing tank by itself, the concentrate produced by the roughing goes to the first beneficiation, and the concentrate produced by the first beneficiation goes to the second beneficiation to increase the silver grade again to produce the concentrate; the beneficiation and After rough selection, the tailings are swept three times to produce tailings to the rotary kiln slag treatment process, and the concentrated ore produced by sweeping enters ...
Embodiment 2
[0050] a. Add 5000g of electrolytic zinc waste slag after washing to 32L of water to make a slurry, pump it into the reaction tank, and control the density of the slurry to 1.44×10 3 kg / m 3 , pH=5.0, add activator sodium sulfide 1.5g, ethylenediamine phosphate 1g, react at 50°C for 50 minutes. Then the above-mentioned reactant is pumped into the flotation head tank for standby, and the liquid outlet of the head tank is controlled by a valve, so that the slurry flows into the flotation tank evenly.
[0051] The prepared slurry flows into the roughing tank by itself, the concentrate produced by the roughing goes to the first beneficiation, and the concentrate produced by the first beneficiation goes to the second beneficiation to increase the silver grade again to produce the concentrate; the beneficiation and After rough selection, the tailings are swept three times to produce tailings to the rotary kiln slag treatment process, and the concentrated ore produced by sweeping ent...
Embodiment 3
[0062] a. Add 5000g of electrolytic zinc waste residue after washing to 31L of water to make a slurry, pump it into the reaction tank, and control the slurry density to 1.49×10 3 kg / m 3 , pH=5.5, add activator sodium sulfide 1.5g, ethylenediamine phosphate 1g, react at 55°C for 60 minutes. Then the above-mentioned reactant is pumped into the flotation head tank for standby, and the liquid outlet of the head tank is controlled by a valve, so that the slurry flows into the flotation tank evenly.
[0063] The prepared slurry flows into the roughing tank by itself, the concentrate produced by the roughing goes to the first beneficiation, and the concentrate produced by the first beneficiation goes to the second beneficiation to increase the silver grade again to produce the concentrate; the beneficiation and After rough selection, the tailings are swept three times to produce tailings to the rotary kiln slag treatment process, and the concentrated ore produced by sweeping enters ...
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