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Method for bioleaching vanadium in vanadium-containing shale through composite nitrogen source

A technology of bioleaching and compound nitrogen source, applied in the direction of improving process efficiency, can solve the problems such as the inability to improve bacterial growth and metabolism at the same time, the insufficient degree of damage to the lattice structure of ore, and the poor bacterial leaching effect, etc. To achieve the effect of strong bacterial growth and metabolism, high leaching efficiency, and improved indirect effect

Pending Publication Date: 2021-06-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the efficiency of vanadium leaching by existing silicate bacteria in vanadium-containing shale vanadium extraction system is low. For different ore leaching systems, the most suitable type of nitrogen source is different. The growth and metabolism of bacteria under the condition of single nitrogen source The ability cannot be improved at the same time, resulting in insufficient damage to the lattice structure of the ore, and poor bacterial leaching effect

Method used

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Examples

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Effect test

Embodiment 1

[0043] A method for biologically leaching vanadium in vanadium-bearing shale with a compound nitrogen source. The steps of the method described in this embodiment are:

[0044] Step 1. Vanadium-bearing shale pretreatment

[0045] The vanadium-containing shale is first crushed and ground until the particle size is less than 0.074 mm, accounting for 65%, and then roasted at 600° C. for 30 minutes to obtain the vanadium-containing shale decarburization powder.

[0046] Step 2. Prepare nitrogen-containing basal medium

[0047] According to the concentration of sucrose, disodium hydrogen phosphate, anhydrous ferric chloride, magnesium sulfate heptahydrate, calcium carbonate and compound nitrogen source, it is 5.0Kg m -3 , 1.0Kg·m -3 , 0.005Kg·m -3 , 0.5Kg·m -3 , 0.1Kg·m -3 and 1.0Kg·m -3 , dissolving the sucrose, the disodium hydrogen phosphate, the anhydrous ferric chloride, the magnesium sulfate heptahydrate, the calcium carbonate and the compound nitrogen source into dist...

Embodiment 2

[0058] A method for biologically leaching vanadium in vanadium-bearing shale with a compound nitrogen source. The steps of the method described in this embodiment are:

[0059] Step 1. Vanadium-bearing shale pretreatment

[0060] The vanadium-containing shale is first crushed, ground until the particle size is less than 0.074mm and accounts for more than 78%, and then roasted at 650° C. for 50 minutes to obtain the vanadium-containing shale decarburization powder.

[0061] Step 2. Prepare nitrogen-containing basal medium

[0062] According to the concentration of sucrose, disodium hydrogen phosphate, anhydrous ferric chloride, magnesium sulfate heptahydrate, calcium carbonate and compound nitrogen source, it is 7.0Kg m -3 , 1.6Kg·m -3 , 0.007Kg·m -3 , 0.7Kg·m -3 , 0.15Kg·m -3 and 3.0Kg·m -3 , dissolving the sucrose, the disodium hydrogen phosphate, the anhydrous ferric chloride, the magnesium sulfate heptahydrate, the calcium carbonate and the compound nitrogen source i...

Embodiment 3

[0073] A method for biologically leaching vanadium in vanadium-bearing shale with a compound nitrogen source. The steps of the method described in this embodiment are:

[0074] Step 1. Vanadium-bearing shale pretreatment

[0075] The vanadium-containing shale is first crushed, ground until the particle size is less than 0.074 mm and accounts for more than 90%, and then roasted at 800° C. for 60 minutes to obtain the vanadium-containing shale decarburization powder.

[0076] Step 2. Prepare nitrogen-containing basal medium

[0077] According to the concentration of sucrose, disodium hydrogen phosphate, anhydrous ferric chloride, magnesium sulfate heptahydrate, calcium carbonate and compound nitrogen source, it is 10.0Kg m -3 、2.0Kg·m -3 , 0.01Kg·m -3 , 0.8Kg·m -3 , 0.2Kg·m -3 and 4.0Kg·m -3 , dissolving the sucrose, the disodium hydrogen phosphate, the anhydrous ferric chloride, the magnesium sulfate heptahydrate, the calcium carbonate and the compound nitrogen source in...

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Abstract

The invention relates to a method for bioleaching vanadium in vanadium-containing shale through a composite nitrogen source. According to the technical scheme, the method comprises the steps that decarburization pretreatment is conducted on the vanadium-containing shale, the vanadium-containing shale is put into a composite nitrogen source microorganism basic culture medium composed of (NH4)2SO4 and NH4NO3 with the ore pulp concentration being 10-100Kg.m<-3>, bioleaching is conducted for 20-30 days, solid-liquid separation is conducted on leached vanadium-containing shale ore pulp, vanadium-containing leachate is obtained, and that the vanadium leaching rate reaches 66-78% is determined. According to the method, a vanadium-containing shale system is leached through silicate bacteria, the bacterium growth and metabolism capacity is high under the composite nitrogen source condition, the damage degree of the bacteria to mineral lattices is increased, and the leaching efficiency of the vanadium in the vanadium-containing shale is high.

Description

technical field [0001] The invention belongs to the technical field of bioleaching vanadium in vanadium-containing shale. In particular, the invention relates to a method for biologically leaching vanadium in vanadium-bearing shale with a compound nitrogen source. 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 an important raw material for extracting vanadium, but the grade of vanadium in vanadium-bearing shale is generally low and the ore phase composition is complex, and most of the vanadium in it occurs in the crystal lattice of (aluminum) silicate minerals, and the structure is relatively complex. Stable and not easy to leach. Although the existing vanadium extraction method of direct chemical leaching of vanadium-bearing shale is efficient and fast, it still has the disadvantages of high energy consumption and high cost. [0...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B34/22C22B1/00
CPCC22B3/18C22B34/22C22B1/00Y02P10/20
Inventor 蔡震雷王粤张一敏郑秋实
Owner WUHAN UNIV OF SCI & TECH
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