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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

Active Publication Date: 2013-05-01
YUNNAN CHIHONG ZINC & GERMANIUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above two methods of removing impurities after dissolving copper sulfate, although they can obtain higher purity copper sulfate products, all need to add impurity removers, the process is complicated, and the production cost is high.

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0031] (1) Copper slag produced by 1 ton of zinc hydrometallurgy is used as the raw material. Copper mainly exists in the form of cuprous oxide. The mass percentage of its main chemical components is Cu 25.0wt%, Pb 20.0wt%, Zn 4.8wt%, and Acid-containing 135g / l dilute sulfuric acid solution is 4m according to the liquid-solid ratio 3 / t mixed into 5m 3 Into a pressure vessel, at 80°C, oxygen with a volumetric oxygen content of 99.5% is blown into the pressure vessel to keep the partial pressure of oxygen in the pressure vessel at 0.2Mpa, the total pressure at 0.25MPa, the leaching time is 2 hours, and the final pH value is 2.0, and the leaching The feed liquid is filtered with a filter press at 80°C to obtain leaching liquid and leaching slag respectively, and the leaching slag is sent to other smelting processes to recover other valuable metals. The leaching rate is 95.6%.

[0032] (2) Add the leaching solution obtained in step (1) to 4m 3 Into the crystallization kettle, ...

Embodiment 2

[0035] (1) 100g of sponge copper slag is used as the material, copper mainly exists in the form of metallic copper, and the mass percentage of its main chemical components is Cu 75.4wt%, Zn 10.2wt%, Pb 1.5wt% and acid 160g / l dilute sulfuric acid The solution is 10m according to the liquid-solid ratio 3 / t mixed into a 2L pressure vessel, at 75°C, blow in oxygen-enriched air with a volume oxygen content of 30%, keep the oxygen partial pressure in the pressure vessel at 0.08Mpa, and the total pressure at 0.3MPa, leaching for 4 hours , the end point pH value is 1.5, and the leaching material liquid is obtained, which is vacuum filtered at 85°C to obtain the leaching liquid and leaching slag respectively, and the leaching slag is returned to other smelting processes to recover other valuable metals. The leaching rate is 95.8%.

[0036] (2) Put the leaching solution obtained in step (1) in an 800ml beaker, let it stand for cooling and crystallization, the final temperature of cool...

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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.

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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Application Information

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IPC IPC(8): C22B9/04C22B3/08C22B3/22C22B15/00C01G3/10
CPCY02P10/20
Inventor 贾著红吴红林包崇军张候文邹利明和晓才保宁王少龙彭建蓉王瑞山廖为新谢天鉴罗凌艳黄久顺张永平武云能洪永明陈科彤郑昌华邓鹏翔刁微之水元丽姜敏
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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