Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for separating copper and cobalt in alloy leaching solution and recycling sulfuric acid in solution

A technology for separating alloys and recovering solutions, applied in the field of hydrometallurgy and chemical industry, can solve problems such as acid waste, and achieve the effects of reducing production costs, shortening the technological process, and easily controlling the production process

Inactive Publication Date: 2015-10-14
TIANJIN MAOLIAN SCI & TECH
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this treatment process is that the sponge copper obtained after alloy replacement and copper removal of the raffinate is returned to the leaching process, and acid is needed for leaching, and the excess acid in the solution is neutralized with alkaline substances, resulting in a waste of acid

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for separating copper and cobalt in alloy leaching solution and recycling sulfuric acid in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Composition: Cu 70g / L, Co 30g / L, Fe 0.095g / L, H 2 SO 4 2L of 15g / L alloy leaching solution, after 20 hours of conventional electrowinning and 5 hours of cyclone electrowinning, the composition of the leaching solution is: Cu 0.2g / L, Co 29.91g / L, Fe 0.08g / L, H 2 SO 4 120g / L, then the solution was evaporated and concentrated, and after evaporation, it was separated by suction filtration to obtain 132.8g of cobalt yellow residue containing 37.5% Co, and the concentrated solution component was H 2 SO 4 510g / L, Co 21.7g / L sulfuric acid concentrated solution 470ml.

[0017] The recovery rate of comprehensive sulfuric acid is over 99%. The output rate of cobalt is >80%.

Embodiment 2

[0019] Composition: Cu 30g / L, Co 15g / L, Fe 0.087g / L, H 2 SO 4 13g / L alloy leaching solution 2L, after conventional electrowinning for 12 hours and swirl electrowinning for 5 hours, the composition of the leaching solution is: Cu 0.26g / L, Co 14.89g / L, Fe 0.064g / L, H 2 SO 4 58g / L, then the solution was evaporated and concentrated, and after evaporation, it was separated by suction filtration to obtain 69.1g of cobalt yellow residue containing 36.8% Co, and the concentrated solution component was H 2 SO 4 305g / L, 380ml of concentrated sulfuric acid solution of Co 12g / L.

[0020] The recovery rate of comprehensive sulfuric acid is over 99%. The output rate of cobalt is >84%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a process for separating copper and cobalt in an alloy leaching solution and recycling sulfuric acid in the solution. The process comprises the steps that 1, the Cu, Co and sulfuric acid solution without Fe is obtained in a leached mode and is gradually removed through step-by-step electrodeposition, 85%-90% of copper in the solution is removed through an electrodeposition tank, a qualified cathode copper plate is obtained, remaining 10%-15% of Cu is removed through rotation flow electrodeposition or other solution deep copper removing modes, and finally the solution with Cu smaller than 0.5 g / L and Co of 25-35 g / L is obtained; 2, the solution with Cu removed enters an evaporator to evaporate, the concentration of the sulfuric acid in the solution is improved, and Co<2+> is separated out through cobaltous sulfate, and cobalt yellow residues are obtained; 3, the cobalt yellow residues are separated from the solution; and 4, the obtained cobalt yellow residues are dissolved again, Cu, Mn, Ca and Zn in the cobalt yellow residues are removed through P204 extraction agents, then Co and Ni are separated through P507, a final product is obtained, and the concentrated sulfuric acid solution obtained in the step 3 is used for leaching of raw materials. In the whole procedure of leaching extraction and product output, sulfuric acid is almost not consumed, and processing cost is greatly lowered.

Description

technical field [0001] The invention relates to the field of hydrometallurgy and chemical industry, in particular to a process for separating copper and cobalt in a solution and recovering sulfuric acid in the solution by an electrowinning-evaporation concentration method. Background technique [0002] After the copper-containing alloy is oxidized and leached by sulfuric acid, a copper-containing liquid containing 50-70 g / L of copper is obtained. The current treatment process of this solution containing Cu, Co and sulfuric acid is to first separate the Cu in the solution through extraction, and back extract to obtain a copper sulfate solution for electrowinning to obtain cathode copper. The raffinate contains 5g / L or higher concentration of copper. Cu contains Co and sulfuric acid with a high concentration. To purify Co in the raffinate, it is necessary to use an alloy to remove copper from the solution, and then add soda ash or other alkaline substances to neutralize the ex...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/26C22B15/00C22B23/00
CPCY02P10/20
Inventor 蔺国盛刘淑媛郑泽翰侯平李燕
Owner TIANJIN MAOLIAN SCI & TECH