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A method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate

A molybdenum concentrate and extraction technology is applied in the field of extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate, which can solve the problems of large environmental pollution and low recovery rate, reduce the harm of lead, reduce the generation of smoke and dust, and reduce the content of impurities Effect

Active Publication Date: 2020-09-04
西安鑫城投资有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrates, to solve the technical problems of the existing technology that pollutes the environment greatly and the recovery rate of molybdenum and rhenium is low in the production process

Method used

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  • A method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate
  • A method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate

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Embodiment 1

[0093] A method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate, see figure 1 , follow the steps below:

[0094] (1) Pretreatment process

[0095] Add molybdenum concentrate, calcium chloride and hydrochloric acid in the same container, the mass ratio of the calcium chloride to the molybdenum concentrate is 4:10, the mass concentration of the hydrochloric acid is 8%, and the solid-liquid mass ratio is 1.2 : 5, then the container is put into a constant temperature water bath with constant temperature stirring and immersion, the immersion temperature is 93 ℃, and the immersion time is 50min, after the stirring stops, suction filtration while hot is obtained to obtain filter cake and filtrate, The filtrate is crystallized to precipitate lead dioxide, and the filter cake is washed several times with distilled water at the same temperature and then dried to obtain medium-grade molybdenum concentrate, and the removal rate of lead has reached 92....

Embodiment 2

[0112] A method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate is carried out according to the following steps:

[0113] (1) Pretreatment process

[0114] Add molybdenum concentrate, calcium chloride and hydrochloric acid in the same container, the mass ratio of the calcium chloride to the molybdenum concentrate is 1:10, the mass concentration of the hydrochloric acid is 6%, and the solid-liquid mass ratio is 0.5 : 5, then the container is put into a constant temperature water bath with constant temperature stirring and immersion, the immersion temperature is 90 ℃, and the immersion time is 40min, after the stirring stops, suction filtration while hot is obtained to obtain filter cake and filtrate, The filtrate is crystallized to precipitate lead dioxide, and the filter cake is washed several times with distilled water at the same temperature and then dried to obtain medium-grade molybdenum concentrate, and the removal rate of lead has rea...

Embodiment 3

[0131] A method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate is carried out according to the following steps:

[0132] (1) Pretreatment process

[0133] Add molybdenum concentrate, calcium chloride and hydrochloric acid in the same container, the mass ratio of the calcium chloride to the molybdenum concentrate is 5:10, the mass concentration of the hydrochloric acid is 12%, and the solid-liquid mass ratio is 1.5 : 5, then the container is put into a constant temperature water bath with constant temperature stirring and immersion, the immersion temperature is 95 ℃, and the immersion time is 60min, after the stirring stops, suction filtration while hot is obtained to obtain filter cake and filtrate, The filtrate is crystallized to precipitate lead dioxide, and the filter cake is washed several times with distilled water at the same temperature and then dried to obtain a medium-grade molybdenum concentrate, and the removal rate of lead has ...

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Abstract

The invention belongs to the molybdenum metallurgy industry in the field of nonferrous metallurgy, and relates to a method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate, which specifically includes 8 steps, which are pretreatment process, mixing and granulation process, solidification and roasting process, Water leaching process, precipitation, crystallization process, acid leaching process, co-extraction-reextraction process, acid precipitation process, the obtained molybdenum is crystallized in the form of ammonium tetramolybdate, and rhenium is crystallized in the form of potassium perrhenate. The present invention pretreats the molybdenum concentrate to remove lead, so that the lead is recovered in the form of lead dichloride, and the harm of lead is greatly reduced. Quicklime is added to convert the sulfide in the concentrate into sulfate, and eliminate the sulfide produced in the oxidation roasting process. SO 2 In addition, the process of the present invention is expected to shorten the process flow, reduce equipment investment, improve the recovery rate of molybdenum and rhenium and the quality of products, and facilitate the production of ammonium molybdate products.

Description

technical field [0001] The invention belongs to the molybdenum metallurgy industry in the field of nonferrous metallurgy, and relates to a method for extracting molybdenum and rhenium from rhenium-containing molybdenum concentrate. Background technique [0002] my country's rhenium resources are extremely limited, and there are few independent minerals in nature. Generally, it appears in the crystal lattice of molybdenite with isomorphism, associated with molybdenum ore and copper ore. Rhenium has excellent ductility, formability and carburization resistance, high temperature resistance, high resistance, and is mainly used in aviation, high-energy physics, electronic technology, nuclear technology, etc. Therefore, the separation, enrichment and recovery of rhenium has become a research hotspot. [0003] At present, the mainstream oxidation roasting-ammonia leaching process is to recover rhenium from smoke and molybdenum from ammonia leaching solution. The basic principles a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/34C22B61/00C22B1/24C22B1/02C22B3/08C22B3/40C22B3/44
CPCC22B1/02C22B1/24C22B3/08C22B3/44C22B34/34C22B61/00C22B3/402Y02P10/20
Inventor 陈五申蒋昊罗骏杜威
Owner 西安鑫城投资有限公司
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