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Method for recovering Zn, Pb and Ag from electrolytic zinc acid leaching slag

A technology of electrolytic zinc acid leaching slag and zinc-lead, applied in the direction of improving process efficiency, etc., can solve problems such as difficult separation of metal components, high fluorine and chlorine content in products, and large environmental pollution, and achieve low cost, no discharge of three wastes, and waste collection. high rate effect

Inactive Publication Date: 2010-12-15
胡学勇
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AI Technical Summary

Problems solved by technology

[0002] At present, the only way to deal with electrolytic zinc acid leaching slag at home and abroad is to use fire roasting. This method consumes a lot of energy, it is difficult to separate various metal components in the slag, and the product contains high fluorine and chlorine. It needs to be removed for electrolytic production. The cost is high, and a large amount of sulfur dioxide and sulfur trioxide are produced to form acid mist, which causes great environmental pollution

Method used

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Embodiment Construction

[0006] specific implementation plan

[0007] Take 500Kg of electrolytic zinc acid leaching residue containing 8% zinc and 6% lead, grind it into powder with a ball mill, add 1500Kg water to make a 25% slurry, put it into a mixing tank, and add hypochlorous acid in a mass ratio of 0.5:1000 Calcium 0.25Kg, after stirring for 5-10 minutes, add sodium sulfide 0.1Kg according to the ratio of mass ratio 0.2:1000, and then add 0.15Kg of thiazole according to the ratio of mass ratio 0.3:1000, stir for 5-10 minutes and then send into The lead-silver flotation cell carries out flotation, obtains the product 40.48Kg of lead content 63%; The lead-silver flotation cell lower floor paste is sent in the mixing tank again, adds activator sodium sulfide in the ratio of 0.2: 1000 by mass ratio, Then add the collector and imidazole according to the ratio of mass ratio 0.25:1000, after stirring for 5-10 minutes, send into the flotation tank for flotation to obtain 70.83Kg of zinc product with a c...

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Abstract

The invention relates to a method for recovering Zn, Pb and Ag from electrolytic zinc acid leaching slag, which comprises the steps of: pulverizing the electrolytic zinc acid leaching slag with a ball mill, adding calcium hypochlorite as a reducing agent by proportion and stirring for 5-10 minutes, adding sodium sulfide as an activating agent and benzothiazole as a collecting agent, stirring for 5-10 minutes and then delivering into a Pb-Ag floatation tank for floatation to obtain Pb and Ag products; and delivering paste at the lower layer of the Pb-Ag floatation tank into a stirring barrel, adding sodium sulfide as a Zn floatation activating agent and the benzothiazole as the collecting agent, stirring for 5-10 minutes, and delivering into a floatation tank for floatation to obtain the product of Zn. The method for recovering Zn, Pb and Ag from the electrolytic zinc acid leaching slag has high yield up to above 85 percent, low energy consumption and cost, obvious metal separation in the products without fluorine and chlorine and no emission of three wastes.

Description

technical field [0001] The invention relates to a method for recovering zinc, lead and silver from electrolytic zinc acid leaching residue. Background technique [0002] At present, the only way to deal with electrolytic zinc acid leaching slag at home and abroad is to use fire roasting. This method consumes a lot of energy, it is difficult to separate various metal components in the slag, and the product contains high fluorine and chlorine. It needs to be removed for electrolytic production. The cost is high, and a large amount of sulfur dioxide and sulfur trioxide are produced to form acid mist, which causes great environmental pollution. Contents of the invention [0003] The invention aims to disclose a method for recovering zinc, lead and silver from electrolytic zinc acid leaching slag with low cost and no pollution. [0004] In the present invention, the electrolytic zinc acid leaching slag is ground into powder by a ball mill, and mixed with water to make a 20-40%...

Claims

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Application Information

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IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 胡学勇
Owner 胡学勇