Deep dechlorination method for zinc electrolyte
The method comprises the following steps: S1, copper-cadmium slag pretreatment: taking low-grade copper-cadmium slag generated in a zinc smelting process as a raw material, adding sulfuric acid, heating, stirring and reacting, and filtering; recovering cadmium from the filtrate, washing the filter r...
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Main Authors | , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
13.05.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The method comprises the following steps: S1, copper-cadmium slag pretreatment: taking low-grade copper-cadmium slag generated in a zinc smelting process as a raw material, adding sulfuric acid, heating, stirring and reacting, and filtering; recovering cadmium from the filtrate, washing the filter residue, and roasting; leaching one part of the roasting slag by using sulfuric acid to prepare a copper sulfate solution; s2, dechlorination reaction: adding chlorine-containing zinc electrolyte into a dechlorination reaction tank, adjusting acid, introducing nitrogen, and then adding a copper sulfate solution and roasting slag for reaction; after the reaction is finished, carrying out solid-liquid separation to obtain dechlorination liquid and dechlorination copper slag; zinc powder is added into the obtained dechlorination liquid to remove copper, and copper-removed liquid and copper slag are obtained; the copper-removed liquid is pumped to a purification system for impurity removal, and copper slag returns to th |
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Bibliography: | Application Number: CN202210127444 |