Method for producing high-quality copper sulfate through low-pressure oxygen leaching of copper slag

A low-pressure oxygen and copper sulfate technology, applied in the direction of copper sulfate, process efficiency improvement, etc., can solve the problems of complicated process and high production cost, and achieve the effect of high product purity
CN103074499AActive Publication Date: 2013-05-01YUNNAN CHIHONG ZINC & GERMANIUM +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YUNNAN CHIHONG ZINC & GERMANIUM
Publication Date
2013-05-01

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Abstract

The invention relates to a method for producing high-quality copper sulfate through low-pressure oxygen leaching of copper slag. A copper-bearing material with metallic copper or cuprous oxide content greater than 15wt% serves as a raw material, and the method comprises the steps of copper slag or spongy copper slag pickling of zinc hydrometallurgy. A dilute sulphuric acid solution is adopted for low-pressure oxygen leaching of the raw material, an obtained leachate is subjected to combined crystallization including cooling crystallization and salting-out crystallization, a copper sulfate crystal is obtained after liquid-solid separation, and dried after multistage washing, and copper sulfate meeting requirements of above a premium grade specified in YS / T 94-2007 is obtained.
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Description

technical field

[0001] The invention relates to a method for producing high-quality copper sulfate by low-pressure oxygen leaching of copper slag, belonging to the technical field of hydrometallurgy. Background technique

[0002] The known methods of producing copper sulfate from copper slag materials containing metallic copper or cuprous oxide are: 1) Copper slag leaching: leaching copper slag directly or indirectly with dilute sulfuric acid, and filtering to obtain copper sulfate solution, including high-temperature roasting-conventional leaching method, oxidant or catalyst dissolution method, liquid-phase air oxidation method, oxygen pressure leaching method, stockpile oxidation-conventional leaching method. 2) Crystallization of the leaching solution: crystallize copper from the solution in the form of copper sulfate pentahydrate, including concentrated crystallization, cooling crystallization, and salting out crystallization. 3) Copper sulfate impurity removal: includi...

Claims

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