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Method of enriching vanadium from vanadium-containing shale living bodies by combining roasting with acid leaching

A technology for calcining acid and shale, which is applied in the field of joint enrichment of vanadium, can solve the problems of many types of chemicals, large environmental impact and high economic cost, and achieves the effects of environmental friendliness, low production cost and reduced use of chemicals

Active Publication Date: 2019-03-26
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct extraction of unpretreated acid leaching solution, in order to remove impurity ion iron, the process is relatively cumbersome, and many types of chemicals are added, which not only has high economic costs, but also has a great environmental impact

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for vanadium-bearing shale bio-roasting acid leaching combined enrichment of vanadium. The steps of the method described in this embodiment are:

[0035] Step 1. Vanadium-containing shale crushing and grinding treatment

[0036] The vanadium-containing shale is crushed until the particle size is less than 3 mm, and then finely ground until the particle size is less than 0.074 mm, accounting for 70-75 wt%, to obtain the vanadium-containing shale raw ore powder.

[0037] Step 2, preparation of Waksman medium basal salt solution

[0038] Ammonium sulfate, dipotassium hydrogen phosphate, calcium chloride dihydrate and magnesium sulfate heptahydrate are dissolved in distilled water and stirred to make Waksman medium basal salt solution; The concentrations of calcium chloride hydrate and the sulfuric acid heptahydrate in the Waksman medium basal salt solution are 0.2~0.8Kg·m successively -3 , 1~6Kg·m -3 , 0.1~0.2Kg·m -3 and 0.1~0.8Kg·m -3 .

[0039] Step 3. Pr...

Embodiment 2

[0050] A method for vanadium-bearing shale bio-roasting acid leaching combined enrichment of vanadium. The steps of the method described in this embodiment are:

[0051] Step 1. Vanadium-containing shale crushing and grinding treatment

[0052] The vanadium-containing shale is crushed until the particle size is less than 3 mm, and then finely ground until the particle size is less than 0.074 mm, accounting for 75-80 wt%, to obtain the vanadium-containing shale raw ore powder.

[0053] Step 2, preparation of Waksman medium basal salt solution

[0054] Ammonium sulfate, dipotassium hydrogen phosphate, calcium chloride dihydrate and magnesium sulfate heptahydrate are dissolved in distilled water and stirred to make Waksman medium basal salt solution; The concentration of calcium chloride hydrate and the sulfuric acid heptahydrate in the Waksman medium basal salt solution is 0.2~0.8Kg·m successively -3 , 1~6Kg·m -3 , 0.1~0.2Kg·m -3 and 0.1~0.8Kg·m -3 .

[0055] Step 3. Prep...

Embodiment 3

[0066] A method for vanadium-bearing shale bio-roasting acid leaching combined enrichment of vanadium. The steps of the method described in this embodiment are:

[0067] Step 1. Vanadium-containing shale crushing and grinding treatment

[0068] The vanadium-containing shale is crushed until the particle size is less than 3 mm, and then finely ground until the particle size is less than 0.074 mm, accounting for 80-85 wt%, to obtain the vanadium-containing shale raw ore powder.

[0069] Step 2, preparation of Waksman medium basal salt solution

[0070] Ammonium sulfate, dipotassium hydrogen phosphate, calcium chloride dihydrate and magnesium sulfate heptahydrate are dissolved in distilled water and stirred to make Waksman medium basal salt solution; The concentration of calcium chloride hydrate and the sulfuric acid heptahydrate in the Waksman medium basal salt solution is 0.2~0.8Kg·m successively -3 , 1~6Kg·m -3 , 0.1~0.2Kg·m -3 and 0.1~0.8Kg·m -3 .

[0071] Step 3. Prep...

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Abstract

The invention relates to a method of enriching vanadium from vanadium-containing shale living bodies by combining roasting with acid leaching. The technical scheme is as follows: the method comprisesthe following steps: grinding vanadium-containing shale to obtain vanadium-containing shale raw ore powder; dissolving ammonium sulfate, dipotassium phosphate, calcium chloride dihydrate and magnesiumsulfate heptahydrate in distilled water to prepare a Waksman culture medium base salt solution and then adding the vanadium-containing shale raw ore powder into the solution to prepare an enriching culture medium; mixing a ferrous oxide thiobacillus liquid with the enriching culture medium for pre-treatment to obtain microbial pre-treated vanadium-containing tailings; roasting and acid leaching the microbial pre-treated vanadium-containing tailings to obtain a vanadium-containing lixivium; and then mixing the vanadium-containing lixivium with an organic phase, carrying out counter-current extraction to obtain a loaded organic phase, and counter-extracting the loaded organic phase to obtain a vanadium-enriched solution. The method is low in production cost and environment-friendly. The prepared vanadium-enriched solution is low in iron content and the reagent consumption in the follow-up extraction link can be reduced.

Description

technical field [0001] The invention belongs to the technical field of joint enrichment of vanadium. Specifically, it relates to a method for enriching vanadium in combination with vanadium-containing shale bio-roasting acid leaching. Background technique [0002] Vanadium is an important strategic resource, widely used in iron and steel metallurgy, chemical industry, new energy and other fields. Vanadium-bearing shale is widely distributed in my country and has huge reserves. It is an important raw material for vanadium extraction. Because the vanadium grade in vanadium-bearing shale is generally low and the composition of mineral facies is complex, the existing vanadium-bearing shale directly chemically leached for extraction. Although the vanadium method is efficient and fast, the impurity ion iron content in the final acid leaching solution is very high, which is not conducive to the purification and enrichment of the subsequent leaching solution. [0003] At present, T...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/18C22B3/38C22B34/22
CPCC22B1/02C22B3/18C22B34/22C22B3/3846Y02P10/20
Inventor 蔡震雷何惊涛张一敏刘涛王兴杰
Owner WUHAN UNIV OF SCI & TECH
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