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Method for efficiently leaching tellurium from copper anode slime copper slag by external field action intensifying

A technology for strengthening copper and anode slime, applied in the direction of element selenium/tellurium, etc., can solve the problems of difficult to increase the leaching rate by 70%, complicated extraction process, low leaching rate of tellurium, etc. quick effect

Pending Publication Date: 2019-12-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Copper separation slag contains a large amount of rare elements, the existing extraction process is relatively complicated, the leaching rate of tellurium is low, it is difficult to increase the leaching rate by 70%, and the reaction time is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1, grinding 10g of copper slag raw materials to more than 200 mesh;

[0028] Step 2, mixing the sodium hydroxide solution and 8g sodium chlorate with a concentration of 1mol / L to prepare the mixed material liquid;

[0029] Step 3, place the mixed material liquid of step 2 in the ultrasonic-microwave synergistic reaction workstation, set the basic parameters of the ultrasonic-microwave synergistic reaction workstation, the ultrasonic power is 150W, the control liquid-solid ratio is 9:1, turn on the stirrer, at 150r / min stirring speed and reaction conditions of 30min for leaching reaction.

[0030] In step 4, the solution obtained in step 3 is taken out and placed under normal pressure for leaching for 20 minutes, and then the material is discharged, and the tellurium-containing leach solution is obtained by suction filtration, and the tellurium leaching rate is 87.98%.

Embodiment 2

[0032] Step 1, grinding 10g of copper slag raw materials to more than 200 mesh;

[0033] Step 2, mixing the sodium hydroxide solution and 12g sodium chlorate with a concentration of 1.2mol / L to prepare the mixed material liquid;

[0034] Step 3, place the mixed material liquid obtained in step 2 in the ultrasonic-microwave synergistic reaction workstation, set the basic parameters of the ultrasonic-microwave synergistic reaction workstation, the microwave power is 700W, the control liquid-solid ratio is 10:1, open the stirrer, and The leaching reaction was carried out under the conditions of a stirring speed of 300r / min and a reaction time of 240s.

[0035] In step 4, the solution obtained in step 3 is taken out and placed under normal pressure for leaching for 20 minutes, and then the material is discharged, and the tellurium-containing leach solution is obtained by suction filtration, and the tellurium leaching rate is 91.08%.

Embodiment 3

[0037] Step 1, grinding 10g of copper slag raw materials to more than 200 mesh;

[0038] Step 2, mixing the sodium hydroxide solution and 15g sodium chlorate with a concentration of 1mol / L to prepare the mixed material liquid;

[0039] Step 3, put the mixed material liquid in step 2 in the ultrasonic-microwave synergistic reaction workstation, set the basic parameters of the ultrasonic-microwave synergistic reaction workstation, the ultrasonic power is 300W, the microwave power is 300W, the control liquid-solid ratio is 8:1, open Stirrer, the leaching reaction was carried out under the conditions of a stirring speed of 300r / min and a reaction time of 10min.

[0040] In step 4, the solution obtained in step 3 is taken out and placed under normal pressure for leaching for 20 minutes, and then the material is discharged, and the tellurium-containing leach solution is obtained by suction filtration, and the tellurium leaching rate is 90.67%.

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Abstract

The invention relates to the technology of nonferrous metal hydrometallurgy, in particular to a method for efficiently leaching tellurium from copper anode slime copper slag by external field action intensifying. The method comprises the steps as follows: grinding a copper slag raw material; mixing sodium hydroxide as leachate and sodium chlorate as an oxidant with the raw material to prepare a mixed liquid; and placing the mixed liquid on an ultrasonic-microwave synergistic reaction work station, setting ultrasonic power and microwave power parameters, performing continuous stirring in a certain liquid and solid ratio for leaching reaction under the external field intensifying action of ultrasonic or microwave or ultrasonic-microwave synergism; taking out a solution obtained in the formerstep, performing discharging after leaching under normal pressure, and performing suction filtration on the obtained solution to obtain a tellurium-containing leachate. The method adopts external field ultrasonic and microwave assisted strong oxidation leaching, has the characteristics of short treatment time, high leaching speed, low energy consumption and the like, and can damage the structureof the copper slag, realize efficient leaching of tellurium under normal pressure and increase the tellurium leaching rate by 26%-35%.

Description

technical field [0001] The invention relates to nonferrous metal hydrometallurgy technology, in particular to a method for efficiently leaching tellurium from copper anode slime and copper slag by external field action, and efficiently leaching the valuable metal Te in the copper slag, thereby increasing the leaching rate of tellurium. Background technique [0002] Tellurium is a rare element, and its abundance is the smallest among metals and nonmetals (the average abundance is 6×10 -6 %). Tellurium in copper anode slime is mainly Cu 2 Te, Ag 2 Te, Au 2 Te, PbTe, TeO 2 Compound forms exist. Tellurium and its compounds are widely used: (1) to produce cadmium telluride thin-film solar cells; (2) as an alloy additive to improve the machinability of steel; (3) as a trace additive to improve the machinability of copper alloys without reducing the electrical conductivity (4) As a vulcanizing agent, rubber processing accelerator and catalyst component for synthetic fiber pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02
CPCC01B19/02
Inventor 廖春发彭珊邹耕曾颜亮
Owner JIANGXI UNIV OF SCI & TECH