Method for separating copper from nickel and cobalt solution

Abstract

The invention discloses a method of separating copper from nickel cobalt solution, which relates to a method of separating copper from nickel cobalt solution during the technical process of producing high quality nickel or cobalt through a hydrometallurgy method. The invention is characterized in that LIX<QUESTION MARK> series of extracting agent is adopted to extract and separate copper in the nickel cobalt solution, the conditions of the extracting process are as follows: firstly, the pH value of the feed solution of the nickel cobalt solution is 1.5 to 2.5; secondly, the organic compounding ratio is 5 percent to 35 percent; thirdly, organic thinning agent is number 260 solvent oil or sulfonated kerosene; fourthly, the copper in the feed solution is extracted out through adopting two to three-stage countercurrent extraction; loading organic phase is washed through adopting zero to two-stage diluted acid solution; the copper in the loading organic phase is circularly and back washed through adopting 1 to 3 stages; fifthly, the concentration of the washing loading organic dilute sulfuric acid is 0 to 50 g/l; the concentration of the sulfuric acid for back washing the copper in the loading organic phase is 140 to 190 g/l; sixthly, the temperature during the extracting process is controlled to 15 to 35 DEG C. Compared with the traditional copper removal process, the method of the invention has the advantages that the process flow is short, the adaptability of the raw material is strong, the raw material consumption and energy consumption are few, the metal recovery ratio is high, and the comprehensive utilizing effect is good.

Description

technical field [0001] A method for separating copper from a nickel-cobalt solution relates to a method for separating copper in a nickel-cobalt solution in the process of producing high-quality nickel or cobalt by using a hydrometallurgical method. Background technique [0002] In the traditional nickel or cobalt production process, the methods of separating and removing copper in the solution usually include cobalt, nickel solution-sodium sulfide copper removal method, sulfur powder plus sulfur dioxide copper removal method, hydrolysis and other copper removal methods. There are following disadvantages: [0003] (1) Copper slag contains high nickel or cobalt, and the direct recovery rate of cobalt or nickel is low. This production process undergoes wet copper precipitation, which produces a large amount of copper slag, the copper slag contains 5% to 15% of cobalt or nickel, and the direct recovery rate of cobalt or nickel is only about 90%; [0004] (2) The cost of the c...

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Problems solved by technology

[0003] (1) Copper slag contains high nickel or cobalt, and the direct recovery rate of cobalt or nickel is low

This production process undergoes wet copper precipitation, which produces a large amount of copper slag, the copper slag contains 5% to 15% of cobalt or nickel, and the direct recovery rate of cobalt or nickel is only about 90%;

[0004] (2) The cost of copper removal process is high, and the recovery rate of cobalt or nickel in copper slag is low

The traditional copper removal process uses sodium sulfide, sulfur powder, sulfur dioxide, sodium carbonate, etc., which consumes a lot of materials, high process energy consumption, and low labor productivity, resulting in high production and processing costs of nickel and cobalt hydrometallurgy; the copper produced by the traditional copper removal process The slag contains 5% to 15% cobalt or nickel. It is very difficult to completely separate the cobalt or nickel in the copper slag from the copper, so the recovery rate of cobalt or nickel in the copper slag is low; this will improve the market competition of nickel and cobalt products. Unfavorable strength

[0005] In recent years, people have carried out a lot of experimental research on the difficulties of hydrometallurgical technology for removing copper from nickel and cobalt solutions, and successively used sodium sulfide copper removal method, sulfur powder plus sulfur dioxide copper removal method, electrowinning method, hydrolysis method, etc. However, due to the limitations of these copper removal methods such as high cost, high cobalt or nickel content in copper slag, and incomplete copper removal, the metallurgical process for efficient nickel and cobalt removal of copper in the solution has been explored.

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