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Method for purifying molybdenum disulfide by leaching molybdenum concentrate with chlorate

A molybdenum disulfide and molybdenum concentrate technology, applied in the direction of molybdenum sulfide, can solve the problems of high chemical consumption and energy consumption, high toxicity of cyanide, difficult to promote, etc., to reduce pollution, reduce waste discharge, and improve leaching. effect of effect

Inactive Publication Date: 2010-12-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only suitable for most of the secondary copper minerals in high-quality molybdenum concentrates, and because the toxicity of cyanide is too high, the process is difficult to promote
[0010] (6) Chloride leaching: Yang Jiuliu mentioned the chloride salt leaching of molybdenum disulfide in the fifth issue of "Nonferrous Metals" (Mineral Processing Part) in 2000. wide application

Method used

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  • Method for purifying molybdenum disulfide by leaching molybdenum concentrate with chlorate
  • Method for purifying molybdenum disulfide by leaching molybdenum concentrate with chlorate

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The content of each main component of molybdenum concentrate used is as follows:

[0034] Element type

[0035] See figure 1. First prepare 300ml of an aqueous solution containing ferric chloride 300g / L and ferrous chloride 100g / L, add a small amount of hydrochloric acid to adjust the pH value of the aqueous solution to 0 to obtain a leaching solution. Add 30g of molybdenum concentrate into the leach solution for leaching (solid-to-liquid ratio is 1:10), heat to keep the temperature at 110°C, and keep the rotating speed of the stirring blade at 300rpm. Leach for 10 hours to remove metal sulfide impurities (CuS, FeS 2 and CuFeS 2 etc.), then cool and filter, and wash the leached molybdenum concentrate solid 2 to 3 times with hot water at 30°C to remove the chloride adsorbed on the surface of the molybdenum concentrate. Then the molybdenum concentrate obtained after the leaching process is added in the hydrofluoric acid solution of 200ml, wherein, the molar ...

Embodiment 2

[0036] Embodiment 2 (used molybdenum concentrate is identical with embodiment 1)

[0037] See figure 1 . First configure 75ml of an aqueous solution containing ferric chloride 100g / L, calcium chloride 300g / L, and copper chloride 10g / L, and add a small amount of hydrochloric acid to adjust the pH value of the aqueous solution to 1 to obtain a leaching solution. Add 30g of molybdenum concentrate into the leach solution for leaching (solid-to-liquid ratio is 1:2.5), heat to keep the temperature at 90°C, and keep the rotating speed of the stirring blade at 200rpm. Leach for 4 hours to remove metal sulfide impurities (CuS, FeS 2 and CuFeS 2 etc.), then cool and filter, and wash the leached molybdenum concentrate solid 2 to 3 times with hot water at 60°C to remove the chloride adsorbed on the surface of the molybdenum concentrate. Then the molybdenum concentrate obtained after the leaching process is added in the hydrofluoric acid solution of 300ml, wherein, the molar weight of ...

Embodiment 3

[0038] Embodiment 3 (used molybdenum concentrate is identical with embodiment 1)

[0039] See figure 1 . First configure 150ml of an aqueous solution containing ferric chloride 100g / L, ferrous chloride 300g / L, and cupric chloride 10g / L, and add a small amount of hydrochloric acid to adjust the pH value of the aqueous solution to 0 to obtain a leaching solution. Add 30g of molybdenum concentrate into the leach solution for leaching (solid-to-liquid ratio is 1:5), heat to keep the temperature at 120°C, and keep the rotation speed of the stirring blade at 500rpm. Leach for 6 hours to remove metal sulfide impurities (CuS, FeS 2 and CuFeS 2 etc.), then cool and filter, and wash the leached molybdenum concentrate solid 2 to 3 times with hot water at 80°C to remove the chloride adsorbed on the surface of the molybdenum concentrate. Then the molybdenum concentrate obtained after leaching treatment is added in the hydrofluoric acid solution of 250ml, wherein, the molar weight of hy...

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Abstract

The invention relates to a method for purifying molybdenum disulfide by leaching molybdenum concentrate with chlorate, belonging to the field of wet-process metallurgy. The method comprises the steps of: removing metal sulfide impurities in the molybdenum concentrate used as raw material by heating a leaching solution, wherein the leaching solution is a mixed solution of ferric chloride and chlorate assistants (CuCl2, FeCl2, CaCl2, MgCl2, NaCl and the like), as well as water and a small quantity of hydrochloric acid; then adding a hydrofluoric acid solution to react with silica impurities in the molybdenum concentrate; and finally, dissolving with an organic solvent for recycling sulfur generated in the reaction, cleaning, drying and filtering to obtain the high-purity molybdenum disulfide. The method has simple preparation process; the leaching solution can be recycled after simply processed; and by-proucts of the sulfur and the like generated in the preparation process can be recycled to ensure that the resources are fully utilized and the waste emission is reduced, and finally, the molybdenum disulfide with purity of above 98 percent can be prepared.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, in particular to a method for preparing high-purity molybdenum disulfide by leaching and purifying molybdenum concentrate with chloride salt. Background technique [0002] High-purity molybdenum disulfide has good lubricating properties and can be used as lubricants or lubricating additives in automobiles, industrial machines, and aerospace. According to the statistics of the US Geological Survey in 2007, my country's molybdenum resource reserves rank first in the world. However, the molybdenum products produced in my country are mainly low value-added products such as molybdenum concentrate and ferromolybdenum, while the output of high-purity molybdenum disulfide is low, the product has high impurity content, and a large amount of acid mist and other substances are produced during production. It not only pollutes the environment, but also causes a waste of resources. [0003] There are mainly two...

Claims

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Application Information

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IPC IPC(8): C01G39/06
Inventor 李志宝张妍
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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