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Method of converting vanadium slag into salt extracted vanadium twice

A technology for converting into and vanadium slag, applied in the field of vanadium metallurgy, can solve the problems of difficult industrial production line popularization and application, large fluctuation of vanadium slag and vanadium leaching rate, and high alkali metal/sulfur content in the residue, so as to solve the problem of high alkali metal/sulfur content. , Improve the vanadium transfer rate, the effect of small fluctuation of vanadium transfer rate

Inactive Publication Date: 2020-06-23
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above two techniques for extracting vanadium from vanadium slag solve the problem of high alkali metal / sulfur content in the residue, but they fail to fundamentally solve the problem of large fluctuations in vanadium leaching rate caused by the internal quality difference of vanadium slag, making it difficult to popularize and apply it in industrial production lines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Take vanadium slag (containing V 2 o 5 18.95%, CaO1.94%, MgO1.76%, MnO7.53%) 100g, placed in the muffle furnace, oxidized and self-reformed at 800°C for 120min under the condition of ventilation, to obtain the first clinker, the first After the secondary clinker is crushed to a particle size of ≤0.096mm, it is added to 300mL of the first carbonation leaching agent, stirred and leached for 20 minutes at a slurry temperature of 100°C, and solid-liquid separation is obtained to obtain the first leaching liquid and the first leaching residue. V in the first leaching residue 2 o 5 6.03 wt%. The first leaching residue is oxidized into salt conversion roasting in the muffle furnace at a roasting temperature of 900°C and ventilated for 120 minutes; the second clinker is crushed to a particle size of ≤0.096mm and then added to 300mL of the second carbonation leaching agent , stirring and leaching at a slurry temperature of 100°C for 100 minutes, solid-liquid separation to ob...

Embodiment 2

[0055] Take vanadium slag (containing V 2 o 5 18.95%, CaO1.94%, MgO1.76%, MnO7.53%) 100g, placed in the muffle furnace, oxidized and self-reformed at 850°C for 80min under the condition of ventilation, to obtain the first clinker, the first The secondary clinker was pulverized to a particle size of ≤0.096mm and then added to 250mL of the leaching agent obtained in Example 1, stirred and leached for 180min at a slurry temperature of 70°C, and solid-liquid separated to obtain the first leaching solution and the first leaching residue. V in the first leaching residue 2 o 5 5.48 wt%. The first leaching residue was oxidized into salt conversion and roasted for 100 minutes in a muffle furnace at a calcination temperature of 850°C and ventilated in air. The second clinker was crushed to a particle size ≤ 0.096mm and then added to 250 mL of the leaching product obtained in Example 1. In the slurry, stirring and leaching at a slurry temperature of 100°C for 100 minutes, solid-liqui...

Embodiment 3

[0058] Take vanadium slag (containing V 2 o 5 18.95%, CaO1.94%, MgO1.76%, MnO7.53%) 100g, placed in the muffle furnace, oxidized and self-reformed at 830°C for 100min under the condition of ventilation, to obtain the first clinker, the first After the secondary clinker is crushed to a particle size ≤0.096mm, it is added to 150mL of the leaching agent obtained in Example 2, stirred and leached for 120min at a slurry temperature of 100°C, and solid-liquid separation is obtained to obtain the first leaching solution and the first leaching residue. V in the first leaching residue 2 o 5 5.63 wt%. The first leaching residue was oxidized into salt conversion roasting in the muffle furnace at a calcination temperature of 880°C and ventilated for 70 minutes; the second clinker was crushed to a particle size ≤ 0.096mm and then added to 150mL of the leaching agent obtained in Example 2 , stirred and leached for 100min at a slurry temperature of 100°C, solid-liquid separation obtained...

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Abstract

The invention belongs to the technical field of vanadium metallurgy, particularly relates to a method of converting vanadium slag into salt extracted vanadium twice and aims to achieve the technical effect of providing the method of converting the vanadium slag into the salt extracted vanadium twice. The method comprises the steps that, a, the vanadium slag is oxidized and roasted to obtain a first clinker, and first leached slag and first leaching liquid are obtained through first carbonation leaching; b, the first leached slag is oxidized into salt, the salt is converted and roasted to obtain a second clinker, and second leached slag and second leaching liquid are obtained through second carbonation leaching; and c, the pH value of the first leaching liquid is regulated, and after ammonium metavanadate / sodium metavanadate is separated through crystallization, mother liquid is used as a leaching agent, and the step of second carbonation leaching is performed again for cyclic utilization; or the second leaching liquid is used as a leaching agent, and the step of first carbonation leaching is performed again for cyclic utilization. Through the method, it is needless to additionallyprepare a salifying additive, vanadium content in the leached slag can be lowered, the leaching conversion rate of vanadium is increased, and fluctuation of the vanadium leaching conversion rate is small.

Description

technical field [0001] The invention belongs to the technical field of vanadium metallurgy, and in particular relates to a method for twice converting vanadium slag into salt to extract vanadium. Background technique [0002] Vanadium slag is the main raw material for extracting vanadium oxide. At present, there are two main industrialization processes for vanadium extraction, vanadium slag sodium roasting conversion-water immersion-ammonium vanadate precipitation (sodium process), vanadium slag calcification roasting conversion-sulfuric acid Leaching - vanadate precipitation (calcification process). Among them, the content of sodium oxide in the vanadium extraction tailings produced by the sodiumization process is high, and secondary utilization is difficult. The by-products of solid waste sodium sulfate and vanadium-chromium reduction filter cake in the treatment of vanadium precipitation wastewater are large in quantity and difficult to handle. The tailing slag produced ...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B7/04C22B1/02
CPCC22B1/02C22B7/006C22B7/04C22B34/22Y02P10/20
Inventor 李千文付自碧邓孝伯汪超王英黄可行游本银
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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