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A method for the combined enrichment of vanadium by bio-roasting and acid leaching of vanadium-bearing shale

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

Active Publication Date: 2020-06-09
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 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 .

[0039] Step 3. Prep...

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 for combining vanadium-containing shale bio-roasting and acid leaching to enrich vanadium. The technical scheme is as follows: grind vanadium-containing shale to obtain vanadium-containing shale raw ore powder; dissolve ammonium sulfate, dipotassium hydrogen phosphate, calcium chloride dihydrate and magnesium sulfate heptahydrate into distilled water to make Waksman culture base salt solution, and then add vanadium-containing shale raw ore powder to it to obtain a pre-enrichment medium; mix the Thiobacillus ferrooxidans bacteria liquid with the pre-enrichment medium for pretreatment to obtain microbial pretreatment vanadium-containing Tailings: The vanadium-containing tailings pretreated by microorganisms are roasted and acid leached to obtain a vanadium-containing leaching solution; then the vanadium-containing leaching solution and the organic phase are mixed, and countercurrent extraction is obtained to obtain a loaded organic phase, and the loaded organic phase is reverse-extracted to obtain vanadium-rich liquid. The invention has low production cost and environmental friendliness, and the prepared vanadium-rich liquid has low iron content and can reduce the medicament consumption in the subsequent extraction process.

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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Patent Type & Authority Patents(China)
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