Beneficiation method for copper and lead zinc separation by adopting liquid sulfur dioxide
A liquid sulfur dioxide, sulfur dioxide technology, applied in the direction of solid separation, flotation, etc., can solve the problems of concentration effect of separation operation, unfavorable effective separation of copper and lead and zinc, etc., and achieve the effect of improving the concentration of pulp and improving the separation effect.
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[0021] Example 1
[0022] The invention is used for the separation and flotation of copper and lead and zinc on a copper-lead-zinc polymetallic sulfide ore. Under the condition of 24% slurry concentration, add 200 g / ton of sodium sulfide and stir for 3 minutes, then add 1000 g / ton of sulfur dioxide and stir. The slurry concentration is basically unchanged. Copper and lead-zinc are carried out under the condition that the pH of the slurry is 6.0 Sulfur separation flotation obtains crude copper concentrate and lead-zinc mixed concentrate; the separation indicators are: separated to ore copper grade 5.85%, lead grade 12.61%, zinc grade 23.32%; after separation, the copper concentrate copper and copper grade 19.46%, The lead content is 5.66%, zinc content is 6.47%, and the copper recovery rate is 80.59%; the lead-zinc mixed concentrate contains copper 1.50%; the lead recovery rate is 89.12%, and the zinc recovery rate is 93.27%.
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[0027] Example 2
[0028] The invention is used for the separation and flotation of copper and lead and zinc on a copper-lead-zinc polymetallic sulfide ore. Add 150 g / ton of sodium sulfide and stir for 3 minutes under the condition of 23.5% pulp concentration, then add 800 g / ton of sulfur dioxide and stir, the pulp concentration is basically unchanged, copper and lead zinc are carried out under the condition of pulp pH 6.4 Sulfur separation flotation obtains crude copper concentrate and lead-zinc mixed concentrate; the separation indicators are: separated feed copper grade of 3.37%, lead grade of 12.10%, zinc grade of 23.48%; after separation of copper concentrate, copper and copper grade of 16.42%, containing Lead is 4.58%, zinc is 6.11%, copper recovery rate is 79.63%; lead-zinc mixed concentrate contains copper 0.82%; lead recovery rate is 93.82%, zinc recovery rate is 95.75%.
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[0033] Example 3
[0034] The invention is used for the separation and flotation of copper and lead and zinc on a copper-lead-zinc polymetallic sulfide ore. Add 400 g / ton of sodium sulfide and stir for 4 minutes under the condition of the pulp concentration of 26%, then add 1400 g / ton of sulfur dioxide and stir. The concentration of the pulp remains basically unchanged. Copper and lead-zinc are carried out under the condition that the pH of the pulp is 6.2 Sulfur separation flotation obtains crude copper concentrate and lead-zinc mixed concentrate; the separation indicators are: separated to ore copper grade 6.04%, lead grade 15.17%, zinc grade 24.25%; after separation, copper concentrate copper and copper grade 20.37%, The lead content is 5.81%, the zinc content is 7.23%, and the copper recovery rate is 88.25%; the lead-zinc mixed concentrate contains copper 0.96%; the lead recovery rate is 89.99%, and the zinc recovery rate is 92.20%.
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