Method for extracting molybdenum and rhenium from rhenium and molybdenum containing 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, and achieve the reduction of the harm of lead, the reduction of smoke and dust, and the reduction of impurity content. Effect

Active Publication Date: 2018-09-28
西安鑫城投资有限公司
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  • Abstract
  • Description
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  • Application Information

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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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  • Method for extracting molybdenum and rhenium from rhenium and molybdenum containing concentrate
  • Method for extracting molybdenum and rhenium from rhenium and molybdenum containing concentrate

Examples

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Effect test

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 metallurgical industry of the field of non-ferrous metallurgy and relates to a method for extracting molybdenum and rhenium from rhenium and molybdenum containing concentrate. The method specifically comprises the following eight steps of: a pretreatment process, a blending and granulation process, a fix-roasting process, a water leaching process, a precipitation process, a crystallization process, an acid leaching process, a coextraction-reextraction process and an acid precipitation process, wherein the obtained molybdenum is separated out in the formof ammonium tetramolybdate crystals; and the rhenium is separated out in the form of potassium perrhenate crystals. According to the method provided by the invention, the molybdenum concentrate is pretreated and deleaded so that lead is recycled in the form of lead dichloride; the harms of the lead are greatly reduced; quick lime is added to transform the sulfide in the concentrate into sulfate sothat the problem about environmental pollution caused by the SO2 gas generated in and oxidation and roasting process is prevented; besides, the method provided by the invention can hopefully shortenthe technological process, reduce the equipment investment, increase the recycle rate of the molybdenum and the rhenium, improve the product quality and provide conveniences for producing 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 Applications(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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