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Method for adjusting and controlling dissolution of high iron zinc blende

A technology for sphalerite and sphalerite powder, which is applied in the direction of improving process efficiency, can solve the problems of limited large-scale application, long leaching period, low zinc leaching rate and leaching rate, etc., and achieves favorable comprehensive utilization and leaching effect. Improved, low-cost effects

Active Publication Date: 2018-12-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In recent years, the use of biological means to promote the dissolution of sphalerite has become a hot topic. Biotechnology is considered a green technology, which has the advantages of low cost, environmental friendliness, simple operation and equipment, but there are also some problems in biotechnology, such as leaching cycle Too long, low zinc leaching rate and leaching rate, etc., these unfavorable factors limit its large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add ferric sphalerite powder and 9K medium to the shake flask, then add copper sulfate solution to the shake flask, control the copper ion concentration in the solution to 0.00025g / L, add dilute sulfuric acid to maintain the pH of the solution at 1.5-2.5 , to maintain the reaction process in a sterile state, the reaction temperature is 30°C, the rotation speed is 100-150rpm, and the oxidation-reduction potential is maintained at 350-450 mVvs.Ag / AgCl during the reaction process. On the 8th day, the zinc ion concentration reached 1283 mg / L; on the 18th day, the zinc ion concentration reached 2195 mg / L. Compared with the existing technology, on the 8th day, the zinc ion concentration can be increased by 619 mg / L; on the 18th day, the zinc ion concentration can be increased by 600 mg / L. In this example, a zinc-containing solution is obtained by dissolving a chemical system, and under this condition, the dissolution of sphalerite can be significantly enhanced.

Embodiment 2

[0037] Add ferric sphalerite powder and 9K medium to the shake flask, then add copper sulfate solution to the shake flask, control the copper ion concentration in the solution to 0.00075g / L, add dilute sulfuric acid to control the pH of the solution at 1.5-2.5 , add 0.5%-5% cultured and domesticated acidophilic Thiobacillus ferrooxidans into the shake flask, the reaction temperature is 30°C, the shaker speed is 100-150rpm, and the oxidation-reduction potential is maintained at 450-550 mV vs. Ag / AgCl. On the 10th day, the dissolution rate of zinc reached 85.1%; on the 20th day, the dissolution rate of zinc reached 88.7%. Compared with the prior art, on the 10th day, the dissolution rate of zinc can be relatively increased by 6.1%; on the 18th day, the dissolution rate of zinc can be increased by 6.4%. In this example, a zinc-containing solution is obtained by dissolving a biological system, and under this condition, the dissolution of sphalerite can be significantly enhanced. ...

Embodiment 3

[0039] Add ferric sphalerite powder and 9K medium to the shake flask, then add copper sulfate solution to the shake flask, control the copper ion concentration in the solution to 0.001g / L, add dilute sulfuric acid to control the pH of the solution at 1.7-2.2 , add 0.5%-5% cultured and domesticated acidophilic Thiobacillus ferrooxidans into the shake flask, the reaction temperature is 40°C, the shaker speed is 170-220rpm, and the oxidation-reduction potential is maintained at 500-550 mV vs. Ag / AgCl. On the 10th day, the dissolution rate of zinc ions reached 85.1%, and on the 20th day, the dissolution rate of zinc reached 91.7%. Compared with the prior art, on the 10th day, the dissolution rate of zinc can be relatively increased by 6.2%; on the 20th day, the dissolution rate of zinc can be increased by 8.7%. In this example, a zinc-containing solution is obtained by dissolving a biological system, and under this condition, the dissolution of sphalerite can be significantly enh...

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Abstract

The invention provides a method for adjusting and controlling dissolution of high iron zinc blende. The method for adjusting and controlling the dissolution of the high iron zinc blende comprises thefollowing steps that ore grinding is carried out on the high iron zinc blende to obtain high iron zinc blende powder; acclimation and culture is carried out on acidophilus ferrous oxide thiobacillus in a culture medium to obtain acclimated acidophilus ferrous oxide thiobacillus; the acclimated acidophilus ferrous oxide thiobacillus is inserted into the culture medium containing copper ions, then the high iron zinc blende powder is added into the culture medium containing copper ions to perform reaction and dissolution, solutions containing zinc are obtained through biology system dissolution;and the high iron zinc blende powder is added into the aseptic culture medium containing the copper ions to perform the reaction and the dissolution, and the solutions containing zinc are obtained through chemical system dissolution. The method for adjusting and controlling the dissolution of the high iron zinc blende has simple operation and low cost, is clean and efficient, and has a better large-scale application prospect.

Description

technical field [0001] The invention relates to the fields of biological hydrometallurgy and mineral processing, in particular to a method for regulating the dissolution of sphalerite. Background technique [0002] Zinc is an important non-ferrous metal with a melting point of 419°C and a boiling point of 906°C. It has excellent properties and is widely used. It can be used to protect metals by galvanizing to reduce corrosion, and to manufacture various zinc-based alloys for automobiles, defense industries, and dry batteries. Sphalerite is one of the main zinc-containing minerals. It is mainly composed of zinc sulfide, and its chemical formula is ZnS. Sphalerite usually contains iron, with iron content up to 30%. When the iron content is higher, it is called sphalerite, and it is the most important mineral raw material for refining zinc. [0003] Now the zinc smelting production process is mainly divided into two categories: pyrometallurgy and hydrometallurgy. Among them, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B19/20
CPCC22B3/18C22B19/20Y02P10/20
Inventor 赵红波孟晓宇张伊升张艳军吕鑫邓久帅王帅王军覃文庆邱冠周
Owner CENT SOUTH UNIV