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Molybdenum cleaning metallurgy method

A clean and molybdenite technology, applied in the field of molybdenum clean metallurgy, can solve environmental pollution and other problems, achieve the effects of simplifying the smelting process, solving sulfur dioxide pollution, and being easy to promote industrialization

Active Publication Date: 2018-08-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a clean molybdenum metallurgical method to solve the environmental pollution problem in the existing molybdenite smelting process, especially the output problem of ammonia nitrogen wastewater, and the circulation of the leachate can realize the enrichment of the associated element rhenium at the same time. Easy to recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Using the calcified molybdenum calcined sand of molybdenite as raw material, the molybdenum content is 13.2%, and it is leached with 4mol / L nitric acid under normal pressure conditions of 95°C, and the leaching liquid-solid ratio (L / Kg) is 3:1 , the leaching time is 2h, and the nitric acid leach solution containing molybdenum is obtained, and the leaching rate of molybdenum is 99.2%;

[0034] (2) Using 10% P507+90% sulfonated kerosene as the extraction agent, extracting molybdenum under the condition of O / A=2:1, the extraction method is 5-stage countercurrent extraction, and the extraction rate of molybdenum can reach 95% %above. The loaded organic phase and raffinate are obtained by extraction, wherein the loaded phase is subjected to back-extraction of molybdenum, and the raffinate is recycled to step (1) for use after supplementing the nitric acid consumed in the leaching process.

[0035] (3) Use hydrogen peroxide with a mass concentration of 10% as the strippi...

Embodiment 2

[0038] (1) The calcified molybdenum calcined sand of molybdenite is used as raw material, the molybdenum content is 14.5%, and it is leached with 3mol / L hydrochloric acid under normal pressure conditions of 85°C, and the leaching liquid-solid ratio (L / Kg) is 5:1 , the leaching time is 4h to obtain molybdenum-containing hydrochloric acid leaching solution, and the leaching rate of molybdenum is 99.5%;

[0039] (2) Using 30% Cyanex272+70% sulfonated kerosene as the extraction agent, extracting molybdenum under the condition of O / A=1:1, the extraction method is 3-stage countercurrent extraction, and the extraction rate of molybdenum can reach 90.5 %above. The loaded organic phase and raffinate are obtained by extraction, wherein the loaded phase is subjected to back-extraction of molybdenum, and the raffinate is recycled to step (1) for use after supplementing the hydrochloric acid consumed in the leaching process.

[0040] (3) With a mass concentration of 20% hydrogen peroxide ...

Embodiment 3

[0043](1) Using calcified molybdenum calcined sand of molybdenite as raw material, the content of molybdenum is 12.5%, and it is leached with 2mol / L sulfuric acid under normal pressure conditions of 75°C, and the leaching liquid-solid ratio (L / Kg) is 10:1 , the leaching time is 6h to obtain molybdenum-containing sulfuric acid leaching solution, and the leaching rate of molybdenum is 99.6%;

[0044] (2) Using 50% P204 + 50% sulfonated kerosene as the extraction agent, the extraction of molybdenum is carried out under the condition of O / A = 1:3, the extraction method is 5-stage countercurrent extraction, and the extraction rate of molybdenum can reach 99.1% %above. Extraction obtains a loaded organic phase and a raffinate, wherein the loaded phase is subjected to back-extraction of molybdenum, and the raffinate is recycled to step (1) for use after supplementing the sulfuric acid consumed in the leaching process.

[0045] (3) With a mass concentration of 15% hydrogen peroxide s...

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Abstract

The invention provides a molybdenum cleaning metallurgy method. The molybdenum cleaning metallurgy method comprises the following steps: 1) calcium molybdenum roasted sand obtained by roasting molybdenite through calcium adding is leached by using inorganic acid to obtain molybdenum-contained inorganic acid leaching liquid; 2) a positive ion extracting agent is used for extracting to obtain a molybdenum acyl positive ion-loaded organic phase and raffinate; 3) hydrogen peroxide water solution is used as a reverse extracting agent to obtain molybdenum reverse extracting liquid; and 4) the molybdenum reverse extracting liquid is heated to dissociate molybdic acid peroxide inside to form molybdic acid precipitations for calcining to obtain molybdenum trioxide products. The technical route of anon-ammonia nitrogen molybdenum cleaning metallurgy new process is provided with the calcium molybdenum roasted sand of molybdenite as raw materials by using multi-acid chemical properties of molybdenum without using traditional molybdenum metallurgy ammonia nitrogen flow. The cleaning metallurgy method greatly simplifies the molybdenum smelting flow, thoroughly solves the sulfur dioxide pollution and ammonia nitrogen waste water output problems, can enrich and recover rhenium, has the characteristics of short flow and efficient cleaning, and is easy to industrially popularize.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and in particular relates to a clean metallurgical method for molybdenum. Background technique [0002] Molybdenum is an important strategic rare metal. There are more than 20 forms of molybdenum mineralization in nature, but the most important one is molybdenite (MoS 2 ), accounting for more than 99%. Molybdenite is not only the main raw material for molybdenum metallurgy, but also one of the main sources of strategic metal rhenium. [0003] At present, the oxidation roasting-ammonia leaching process of molybdenite is widely used at home and abroad, and it is a classic metallurgical process of molybdenum. The classic process mainly has the following problems: (1) Molybdenum trioxide is easy to sublimate and volatilize at high temperature, and the oxidation of molybdenum disulfide is a strong exothermic reaction, so a large amount of air needs to be introduced to regulate the...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/26C22B34/34
CPCC22B3/06C22B34/34C22B3/26Y02P10/20C22B3/44C22B1/02C22B3/3842C22B3/3844C22B3/3846C01G39/02C22B3/065C22B3/08C22B3/10
Inventor 赵中伟李永立
Owner CENT SOUTH UNIV
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