Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Study on the Preparation of Copper Sulfate by Copper Powder using Cation Membrane Electrowinning Prepared from Waste Cupric Chloride Solution

염화동 폐액으로부터 양이온격막 전해 채취된 구리 분말을 이용한 황산동의 제조방법 연구

  • Received : 2018.12.19
  • Accepted : 2019.01.17
  • Published : 2019.02.28
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Abstract

Generally, $H_2SO_4$ and Cu metal are used as raw materials for producing copper sulfate. The study relates to a method for producing copper sulfate using electrowinning from a waste solution of copper chloride. Uses are used for copper plating for industry, plating, feed, agriculture, electronic grade PCB. Conventional methods for producing copper sulfate have a problem of a large amount of waste water and a high energy cost. A study on the production method of copper sulfate ($CuSO_4$), which is the most used among copper (Cu) compounds, has a low process operation ratio, a small amount of waste water, and a simple manufacturing process. It is easy to remove Na, Ca, Mg, and Al as impurities by using a cationic membrane. At the same time, high purity copper powder could be recovered by an electrowinninng method. Using the recovered copper powder, high purity copper sulfate could be produced.

일반적으로, 황산동을 제조하기 위한 원료는 $H_2SO_4$ 및 Cu 금속이 사용된다. 본 연구는 폐산, 폐염화동 폐기물부터 전해 채취법을 이용하여 황산동을 제조하는 방법에 관한 것이다. 황산구리의 용도는 공업용, 도금용, 사료용, 농업용, 전자급 PCB 동도금에 사용된다. 종래의 황산동 제조법은 다량의 폐수 및 에너지 비용이 높은 문제점이 있다. 구리(Cu) 화합물 중에서 가장 사용이 많이 되는 황산동($CuSO_4$)의 제조 방법에 관한 연구로서, 공정 운전비가 적고, 폐수 발생이 적으며, 제조 공정이 간단하다. 양이온 맴브레인을 이용하여 Na, Ca, Mg, Al을 불순물로서 제거하기 쉽다. 또한 동시에 전해 채취 방법으로 고 순도 구리 분말을 회수 할 수 있었다. 회수 된 구리 분말을 사용하여 고 순도 황산동을 제조 할 수 있었다.

Keywords

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Fig. 1. Schematic flow sheet for copper sulphate from waste acids.

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Fig. 2. New method for producing copper sulphate from waste acids.

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Fig. 3. Model concentration profile at the membrane-solution interface cation exchange membrane.

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Fig. 4. Producing copper power from electrowinning.

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Fig. 5. Cu concentration at 3.5 V electrowinning.

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Fig. 6. Ampere change at 3.5 V electrowinning.

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Fig. 7. Cu concentration at 4.5 V electrowinning.

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Fig. 8. Ampere change at 4.5 V electrowinning.

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Fig. 9. Cu concentration at 3.5 to 4.5 V electrowinning.

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Fig. 10. Ampere change at 3.5 to 4.5 V electrowinning.

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Fig. 11. producing copper sulfate from copper powder.

Table 1. Chemical composition of CuCl2

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Table 2. Experiment condition

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Table 3. Chemical composition of Cu powder

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Table 4. Chemical composition of Cu powder

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Table 5. Chemical composition of CuSO 4

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