Wet cleaning treatment method for lead chloride slag
A clean treatment, lead chloride technology, applied in the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of corrosion of furnace and steel smoke pipes, taking away lead, and chlorine gas polluting the atmospheric environment, etc.
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Embodiment 1
[0028] The composition and content (mass percentage) of lead chloride slag provided by a company in Hunan are: Pb 71.3%, Cu 1.1%, Bi 0.22%, Sb 0.37%, As 0.13%, Cl - 26.7%, Ag 833g / t.
[0029] Take 1000g of the lead chloride slag, configure 5L of ammonium acetate solution as the leaching solution for coordination leaching, and add 2g of calcium lignosulfonate to the leaching solution during leaching. The amount of ammonium acetate in the ammonium acetate solution is 2 times of the theoretical amount required to form lead ammonium acetate from the lead in the lead chloride slag. The leaching temperature is 50°C, and the leaching time is 90 minutes. Liquid-solid separation after leaching, analysis of Pb in the filtrate 2+ The leaching rate was calculated to be 99.2%, and the concentration of Cu, Bi, Sb, As and Ag in the leaching solution was analyzed, and it was found that they were almost not leached. Pump 4.97L of the obtained leaching solution into the cathode chamber of th...
Embodiment 2
[0031] The composition and content (mass percentage) of lead chloride slag provided by a company in Yunnan are: Pb 66.8%, Cu 1.9%, Bi 0.91%, Sb 0.57%, As 0.22%, Cl - 25.0%, Ag 1135g / t.
[0032] Take 1000g of the lead chloride slag, configure 6L ammonium acetate solution as the leaching solution for coordination leaching, and add 4g of sodium lignosulfonate to the leaching solution during leaching. The amount of ammonium acetate in the ammonium acetate solution is 4.5 times of the theoretical amount required to form lead ammonium acetate from the lead in the lead chloride slag. The leaching temperature is 80°C and the leaching time is 160min. Liquid-solid separation after leaching, analysis of Pb in the filtrate 2+ The leaching rate was calculated to be 98.8%, and the concentration of Cu, Bi, Sb, As and Ag in the leaching solution was analyzed, and it was found that they were almost not leached. All 5.89L of the obtained leachate was pumped into the cathode chamber of the di...
Embodiment 3
[0034] Get the lead chloride slag 1000g among the embodiment 1, get the cathodic electrolytic depletion solution 5L in the above embodiment 2 as leachate, add the calcium lignosulfonate of 3g in the leachate during leaching. The leaching temperature is 30°C, and the leaching time is 60 minutes. Liquid-solid separation after leaching, analysis of Pb in the filtrate 2+The leaching rate was calculated to be 98.1%, and the concentration of Cu, Bi, Sb, As and Ag in the leaching solution was analyzed, and it was found that they were almost not leached. All 4.96L of the obtained leachate is pumped into the cathode chamber in the diaphragm electrolyzer as the catholyte, and 5L of the depleted anode electrolysis solution in the above embodiment 2 is taken, and ammonia water is added therein to adjust its pH value to the level in the diaphragm electrolytic cell. The initial pH of the pre-anolyte (pH 5.0). Afterwards, the solution after adjusting the pH value is pumped into the anode c...
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