Method for recovering tellurium and selenium from copper anode slime smelting flue gas
A technology of copper anode slime and flue gas, applied in the direction of element selenium/tellurium, etc., can solve the problems of affecting selenium recovery rate, melt temperature, high oxygen level requirements, low operating efficiency, etc., and achieve the solution of metal cycle enrichment, The treatment process is simple and feasible, and the effect of improving product quality
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Embodiment 1
[0022] Main content of washing liquid: Se 50g / L, Te 1g / L, Cu 0.6g / L, Mg 2g / L;
[0023] Venturi mud main components: Se 20%, Te 5.0%, Pb 15%, Bi 3.5%, Sb 2.0%;
[0024] (1) Alkaline leaching: After the flue gas from the Caldo furnace is absorbed by the Venturi washing system, the Venturi mud and the washing liquid are put into the neutralization and impurity removal reaction tank, and sodium hydroxide (NaOH) is added at 45g / L for neutralization Precipitate and remove impurities, pass steam to keep the temperature at 80°C, then slowly add hydrogen peroxide at 50g / L for leaching reaction for 2 hours, so that copper, zinc, magnesium and other metal ion impurities are precipitated into the slag, and tellurium in the slag is leached into the solution;
[0025] (2) sulfur dioxide complexation leaching: lead to sulfur dioxide (SO 2 ) complex leaching, so that the selenium in the slag enters the solution in the form of sodium selenosulfite, and after reacting for 4 hours, the pH of th...
Embodiment 2
[0030] Main content of washing liquid: Se 50g / L, Te 1g / L, Cu 0.6g / L, Mg 2g / L;
[0031] Venturi mud main components: Se 20%, Te 5.0%, Pb 15%, Bi 3.5%, Sb 2.0%;
[0032] (1) Alkaline leaching: After the flue gas from the Caldo furnace is absorbed by the Venturi washing system, the Venturi mud and the washing liquid are put into the neutralization and impurity removal reaction tank, and sodium hydroxide (NaOH) is added at 60g / L for neutralization Precipitate and remove impurities, pass steam to keep the temperature at 70°C, and then slowly add hydrogen peroxide at 40g / L for leaching reaction for 2 hours, so that copper, zinc, magnesium and other metal ion impurities are precipitated into the slag, and tellurium in the slag is leached into the solution;
[0033] (2) sulfur dioxide complexation leaching: lead to sulfur dioxide (SO 2 ) complex leaching, so that the selenium in the slag enters the solution in the form of sodium selenosulfite, and after reacting for 4 hours, the pH o...
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