Comprehensive treatment method for high-arsenic lead zinc flue dust ash
A high-arsenic, lead-zinc, and comprehensive treatment technology, applied in the direction of improving process efficiency, can solve the problems of arsenic-containing wastes that are far apart, valuable metals are not fully utilized, and environmental pollution is not fundamentally eliminated, and achieve good results. Promote the application value, reduce the total amount of processing, and the effect of easy operation
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Embodiment 1
[0026] A. Take 500 grams of high arsenic, lead and zinc soot, and add a sulfuric acid solution with a mass concentration of 8% in the reactor according to a liquid-solid mass ratio of 5:1 and increase the temperature to 60°C. Add under stirring conditions with a stirring speed of 300rpm High arsenic, lead and zinc fume ash, leaching dissociated fume ash for 1.0 hour, and then separating to obtain leaching residue and leaching liquid;
[0027] B. In the leaching solution of step A, according to the copper content in the leaching solution, add Na in the theoretical required amount of precipitated copper 2 S, react for 30 minutes at room temperature and stirring at a stirring speed of 400 to obtain CuS precipitation residue and precipitation liquid;
[0028] C. In the precipitated liquid separated in step B, according to the ratio of organic phase to water phase volume ratio of 1:1, add chloroform organic phase containing 0.6 mol / L of diantipyrine to extract zinc, and the extraction te...
Embodiment 2
[0035] A. Take 500 grams of high arsenic, lead and zinc soot, and add a 5% sulfuric acid solution with a mass concentration of 5% to the reactor at a liquid-to-solid mass ratio of 8:1 and add it under stirring conditions at a stirring speed of 500rpm. High arsenic, lead and zinc fume ash, leaching dissociated fume ash for 2.0 hours, and then separated to obtain leaching residue and leaching liquid;
[0036] B. In the leaching solution of step A, according to the copper content in the leaching solution, add Na in the theoretical required amount of precipitated copper 2 S, react for 30 minutes at room temperature and stirring at a stirring speed of 200 to obtain CuS precipitation residue and precipitation liquid;
[0037] C. In the precipitated liquid separated in step B, according to the volume ratio of the organic phase to the water phase at a ratio of 1:1, add the chloroform organic phase containing 0.4mol / L of diantipyrine to extract zinc, and the extraction temperature Room temp...
Embodiment 3
[0044] A. Take 500 grams of high arsenic, lead and zinc soot, and add a sulfuric acid solution with a mass concentration of 7% to the reactor according to a liquid-solid mass ratio of 6:1, and heat to 70°C, and add it under stirring conditions at a stirring speed of 400rpm Soot, leaching dissociated soot for 1.5 hours, and then separating to obtain leaching residue and leachate;
[0045] B. In the leaching solution of step A, according to the copper content in the leaching solution, add Na in the theoretical required amount of precipitated copper 2 S, react for 30 minutes at room temperature and stirring at a stirring speed of 300 to obtain CuS precipitate and precipitated liquid;
[0046] C. In the precipitated liquid obtained by the separation in step B, add the organic phase of chloroform containing 0.5 mol / L of diantipyrine to extract zinc according to the volume ratio of the organic phase to the water phase at a ratio of 1:1. At room temperature, the stirring speed is 400 rpm,...
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