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A method for preparing high-grade copper oxide concentrate based on self-propagating reaction processing copper sulfide concentrate

A self-propagating, copper sulfide technology, applied in the field of non-ferrous metal metallurgy, can solve the problems of complicated and lengthy process, high investment, high cost, etc., and achieve the effect of simple and easy process, stable reaction product and wide application range.

Active Publication Date: 2017-12-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, high cost, high investment, high pollution, complex and lengthy process, etc. brought about by the existing wet and pyrometallurgical processes.

Method used

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  • A method for preparing high-grade copper oxide concentrate based on self-propagating reaction processing copper sulfide concentrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] After the copper sulfide concentrate powder is fully dried, it is crushed and finely ground, and the particle size of the mineral powder is 58 microns. Then the mineral powder and sodium peroxide powder are fully stirred and mixed evenly according to the mass ratio of 1:1, compacted, placed in a high temperature resistant reaction vessel, and the self-propagating reaction is induced by local heating. After the reaction, the product is cooled and placed in an alkali-resistant reaction container, and water is used as the leaching agent to remove impurity elements. The ratio of the reaction product to water-solid-liquid ratio is 1:500 (g / mL), and NaOH is added to control the concentration of sodium hydroxide to 5%. , The leaching temperature is 20°C, and the leaching time is 3.5h to ensure the efficient dissolution and leaching of impurities. The leaching solution is filtered, the filter residue is washed with hot lye and water in sequence, the washing solution is merged i...

Embodiment 2

[0031] After the copper sulfide concentrate powder is fully dried, it is crushed and finely ground, and the particle size of the mineral powder is 74 microns. Then the mineral powder and sodium peroxide powder are fully stirred and mixed according to the mass ratio of 1:2, compacted, placed in a high temperature resistant reaction vessel, and microwave ignition is used to initiate a self-propagating reaction. After the reaction, the product is cooled and placed in an alkali-resistant reaction container, and water is used as the leaching agent to remove impurity elements. The ratio of reaction product and water solid to liquid is 1:400 (g / mL), and NaOH is added to control the concentration of sodium hydroxide to 2.5%. , The leaching temperature is 25°C, and the leaching time is 2.5h to ensure the efficient dissolution and leaching of impurities. The leaching solution is filtered, the filter residue is washed with hot lye and water in sequence, the washing solution is merged int...

Embodiment 3

[0033] After the copper sulfide concentrate powder is fully dried, it is crushed and finely ground, and the particle size of the mineral powder is 35 microns. Then the mineral powder and sodium peroxide powder are fully stirred and mixed evenly according to the mass ratio of 1:3, compacted, placed in a high temperature resistant reaction vessel, and a self-propagating reaction is triggered by thermal explosion ignition. After the reaction, the product is cooled and placed in an alkali-resistant reaction container, and water is used as the leaching agent to extract impurity elements. The ratio of the reaction product to water-solid-liquid ratio is 1:300 (g / mL), and NaOH is added to control the concentration of sodium hydroxide to 7%. , The leaching temperature is 40°C, and the leaching time is 4h to ensure the efficient dissolution and leaching of impurities. The leaching solution is filtered, the filter residue is washed sequentially with hot lye and water, the washing solutio...

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Abstract

The invention discloses a method for processing copper sulphide concentrates and preparing high-grade copper oxide concentrates based on self-propagating reacting, belongs to the technical field of non-ferrous metallurgy and relates to the method for preparing the high-grade copper oxide concentrates and quickly processing the copper sulphide concentrates in an environment friendly mode through self-propagating reacting, water leaching impurity removing and filtering. The method is characterized in that copper sulphide concentrate powder is subjected to crushing and fine grinding after being thoroughly dried and is sufficiently stirred and uniformly mixed with sodium peroxide powder, and the mixture of the ground copper sulphide concentrate powder and the sodium peroxide powder is compacted, placed in an anti-high-temperature reaction vessel and ignited to be subjected to self-propagating reacting. After self-propagating reacting is conducted, obtained products are subjected to impurity removing with water serving as a leaching agent, and the effect that impurities can be efficiently dissolved and leached by adding NaOH is ensured. Leaching liquid is filtered, and filter residues are directly dried to prepare the high-grade copper oxide concentrates. According to the method for processing the copper sulphide concentrates and preparing the high-grade copper oxide concentrates based on self-propagating reacting, the process is easy to control, the cost is low, the energy consumption is very low, no pollution gas is produced, carbon emissions are small, and the environment-friendly high-grade copper oxide concentrates can be efficiently and rapidly leached.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal metallurgy, in particular to different types of copper sulfide concentrates, and relates to a method for treating copper sulfide concentrates based on a self-propagating reaction and converting them into high-grade copper oxide concentrates in one step. Background technique [0002] Copper mineral raw materials are mainly divided into copper sulfide ore and copper oxide ore. Copper sulfide ore is the most important raw material for copper smelting and production. Copper produced from sulfide ore as raw material accounts for about 90% of the total output. Common copper sulfide minerals include chalcocite, copper blue, bornite, arsenite, tetrahedrite and chalcopyrite, and the molecular formula of its main components is uniformly expressed as M x Cu y S z (In the formula, M represents other metal elements such as Fe, and x, y, and z represent different atomic values ​​respectively). The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00
CPCC22B15/0002C22B15/0082Y02P10/20
Inventor 李彬殷晓飞潘德安俞嘉梅姜尚
Owner BEIJING UNIV OF TECH
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