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A kind of microwave enhanced leaching method of chalcopyrite

A technology of strengthening leaching and chalcopyrite, applied in the field of metallurgy, to achieve the effect of high leaching rate, weakening the sulfur layer, and increasing the reaction rate

Active Publication Date: 2018-11-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, the existing leaching methods have certain defects, so it is urgent to develop a leaching method that can effectively solve the "passivation" problem and is environmentally friendly and efficient.

Method used

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  • A kind of microwave enhanced leaching method of chalcopyrite
  • A kind of microwave enhanced leaching method of chalcopyrite
  • A kind of microwave enhanced leaching method of chalcopyrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The microwave enhanced leaching method of chalcopyrite, its steps are as follows:

[0027] 1) Weigh 90g of chalcopyrite (ground to a particle size of less than 0.074mm) and leaching agent solution (the concentration of ferric sulfate in the leaching agent solution is 0.06mol / L, and the concentration of sulfuric acid is 0.4mol / L) according to the solid-liquid ratio of 2g / 150mL Mix well to obtain mixed pulp;

[0028] 2) The mixed pulp obtained in step 1) is subjected to microwave enhanced leaching treatment, the microwave power is 200W, the leaching temperature is 115.6°C, the stirring bar speed is 400r / min, and the leaching time is 2 hours. The leaching rate was 37%.

Embodiment 2

[0030] The microwave enhanced leaching method of chalcopyrite, its steps are as follows:

[0031] 1) Weigh 90g of chalcopyrite (ground to a particle size of less than 0.074mm) and leaching agent solution (the concentration of iron sulfate in the leaching agent solution is 0.06mol / L, and the concentration of sulfuric acid is 0.4mol / L) according to the solid-liquid ratio of 4g / 150mL Mix well to obtain mixed pulp;

[0032] 2) The mixed pulp obtained in step 1) is subjected to microwave enhanced leaching treatment, the microwave power is 200W, the leaching temperature is 115.6°C, the stirring bar speed is 400r / min, and the leaching time is 2 hours. The leaching rate was 43.6%.

Embodiment 3

[0034] The microwave enhanced leaching method of chalcopyrite, its steps are as follows:

[0035] 1) Weigh 90g of chalcopyrite (ground to a particle size of less than 0.074mm) and leaching agent solution (the concentration of ferric sulfate in the leaching agent solution is 0.06mol / L, and the concentration of sulfuric acid is 2.0mol / L) according to the solid-liquid ratio of 4g / 150mL Mix well to obtain mixed pulp;

[0036] 2) The mixed pulp obtained in step 1) is subjected to microwave enhanced leaching treatment, the microwave power is 500W, the leaching temperature is 123°C, the stirring bar speed is 400r / min, and the leaching time is 10 hours. The leaching rate was 75%.

[0037] In this example, by controlling the microwave power to 500W and the concentration of sulfuric acid to 2.0mol / L, the boiling point of the leaching agent solution can be raised to 123°C, while the boiling point of the aqueous solution under general heating is 100°C, and the 2.0mol / L sulfuric acid solu...

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Abstract

The invention relates to a microwave strengthened leaching method of copper pyrites. The method comprises the following steps that (1), the copper pyrites with the particle diameters being less than 0.074 mm are evenly mixed with a leaching agent, and mixed pulp is obtained; and (2), the mixed pulp is subjected to microwave strengthened leaching treatment, and after leaching is finished, a leaching solution containing copper is obtained through filtering. According to the microwave strengthened leaching method of the copper pyrites, the requirements for raw ores of the copper pyrites are low, copper ores which are low in level and difficult to be smelted through a pyrometallurgical technique are subjected to leaching for copper extracting, and gas such as sulfur dioxide is not generated in the whole process, so that the environment-friendly effect is achieved; operation is simple and convenient, the production period is short, and the requirements for the device corrosion-resisting strength and the like are low; and in addition, through the microwave strengthened leaching method of the copper pyrites, the passivating phenomenon can be weakened, the leaching rate for copper is high, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a microwave-enhanced leaching method for chalcopyrite. Background technique [0002] The development of traditional copper ore resources mainly uses selected copper ore to carry out the "smelting-blowing-refining-electrolysis" pyrometallurgical copper smelting process. However, with the rapid development of economy and society, copper ore resources are constantly being exploited and utilized, and the ore grade is getting lower and lower, making it difficult to obtain copper concentrate of the grade required for pyrometallurgy. On the other hand, the pyrometallurgy process will emit a large amount of SO 2 Gas, causing serious environmental pollution, violates the road of sustainable development and the requirements of environmental protection. Therefore, the hydrometallurgy technology with high resource utilization rate and less environmental pollution has been developed ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B15/00
CPCC22B3/08C22B15/0071Y02P10/20
Inventor 赵云良温通宋少先马球林康石长艾自强
Owner WUHAN UNIV OF TECH