Deep nickel and cobalt purification method for zinc leachate
A deep purification and leaching solution technology, which is applied in the field of zinc metallurgy, can solve complex problems and achieve the effects of low temperature, high quality new solution and wide practicability
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Embodiment 1
[0035] Take 2L zinc sulfate immersion solution (Cu0.69g / L, Cd0.74g / L, Co0.052g / L, Ni0.0087g / L, Zn141.00g / L, Mn30.23g / L, Fe<0.010g / L , Sb<0.00010g / L), the pH of the infusion solution is about 4.75, and the density is 1.41g / L. The experiment adopts a two-stage purification method to purify and remove impurities.
[0036] One-stage low-temperature purification: temperature 55°C, zinc powder addition 7.314g, lead sulfate 0.3g, time 60min;
[0037] After the first stage of purification, Cu0.063mg / L and Cd1.61mg / L in the solution; Cu12.9% and Cd14.4% of the first stage of purification residue;
[0038] Second-stage high-temperature purification: Take 1L of purified liquid in the first stage, temperature 80°C, add 3.634g of zinc powder, 0.0363g of lead sulfate, 0.0044g of antimony potassium tartrate, 0.172g of copper sulfate pentahydrate, and 180min;
[0039] After the second-stage purification, Cu0.05mg / L, Cd0.03mg / L, Co0.05mg / L, Ni0.019mg / L in the solution; the second-stage purif...
Embodiment 2
[0041] Take 2L zinc sulfate immersion solution (Cu0.69g / L, Cd0.74g / L, Co0.052g / L, Ni0.0087g / L, Zn141g / L, Mn30.23g / L, Fe<0.01g / L, Sb <0.0001g / L), the pH in the leachate is about 4.75, and the density is 1.41g / L. The experiment adopts a two-stage purification method to purify and remove impurities.
[0042] One-stage low-temperature purification: temperature 50°C, zinc powder addition 4.876g, lead sulfate 0.2g, time 30min;
[0043] After the first stage of purification, Cu0.24mg / L and Cd1.79mg / L in the solution; Cu17.8% and Cd17.7% of the first stage of purification residue;
[0044] Second-stage high-temperature purification: Take 1L of purified liquid in the first stage, temperature 90°C, add 4.990g of zinc powder, 0.0499g of lead sulfate, 0.0044g of antimony potassium tartrate, 0.172g of copper sulfate pentahydrate, and 120min;
[0045] After the second-stage purification, Cu0.05mg / L in the solution, Cd does not exist, Co0.03mg / L, Ni0.021mg / L; the second-stage purification ...
Embodiment 3
[0047] Get leaching solution (Cu0.69g / L, Cd0.74g / L, Co0.052g / L, Ni0.0087g / L, Zn141g / L, Mn30.23g / L, Fe<0.01g / L, Sb< 0.0001g / L), the pH of the infusion solution is about 4.75, and the density is 1.41g / L. The experiment adopts a two-stage purification method to purify and remove impurities.
[0048] One-stage low-temperature purification: temperature 55°C, zinc powder addition 8.5313g, lead sulfate 0.3498g, time 90min;
[0049] Second-stage high-temperature purification: Take 1L of purified liquid in the first stage, temperature 95°C, add 9.98g of zinc powder, 0.0998g of lead sulfate, 0.0088g of antimony potassium tartrate, 0.26g of copper sulfate pentahydrate, and 60 minutes;
[0050] After the second-stage purification, Cu0.05mg / L, Cd0.039mg / L, Co0.043mg / L, Ni0.021mg / L in the solution; the second-stage purification residue Zn79.6%, Cu0.70%, Co0.72%, Ni0.06%, Cd<0.05%.
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