Method for extracting vanadium from stone coal pickle liquor

A technology of acid leaching solution and stone coal, which is applied in the field of vanadium metallurgy, can solve the problems of rising production cost of vanadium extraction from stone coal, unfavorable development and environmental protection, and increased difficulty in recycling, so as to eliminate adverse effects and reduce reagent consumption , to avoid the effect of consumption

Inactive Publication Date: 2014-05-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of oxidants and reducing agents not only increases the production cost of vanadium extraction from stone coal, but also complicates the composition of the liquid after vanadium extraction from ston

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] step one

[0052] After removing aluminum, containing V1.81g / L, Fe T 10.53g / L (Fe T It represents the total concentration of iron element), Fe(III) 4.92g / L lime coal acid leaching solution 10L, stir and add limestone milk to adjust the pH to 1.5, filter, and use P204-kerosene system as the organic phase for the filtrate. The concentration of P204 is 20v / v%. According to O / A (volume ratio of organic phase and water phase) = 1:0.5, three-level contact extraction is carried out to remove iron, to obtain an organic phase containing Fe(III) and V(IV). After iron removal, the Fe(III) and V(IV)-containing organic phase contains Fe 7.23g / L and V(IV)-containing organic phase; the Fe(III)-containing V(IV)-containing organic phase 0.5mol / LH first 2 SO 4 The solution eluted the co-extracted vanadium to obtain an eluate containing V(IV) and an organic phase containing Fe(III); the obtained eluate containing V(IV) was acidified with sulfuric acid to obtain an acidified...

Example Embodiment

[0064] Example 2

[0065] step one

[0066] After removing aluminum, containing V3.83g / L, Fe T 7.65g / L, Fe(III)2.52g / L lime coal acid leaching solution 4L, stir and add CaCO 3 Adjust the pH to 0.7, filter, and use P507-TBP-kerosene system as the organic phase for the filtrate. The concentration of P507 in the organic phase is 15v / v%, according to O / A (volume ratio of organic phase to water phase) = 1: 1 Perform four-stage contact extraction to remove iron to obtain an organic phase containing Fe(III) and V(IV) and a post-iron removal liquid. The organic phase containing Fe(III) and V(IV) contains Fe3.5g / L, containing V0.17g / L; the organic phase containing Fe(III) and V(IV) is first subjected to 0.3mol / LH 2 SO 4 The solution eluted the co-extracted vanadium to obtain an eluate containing V(IV) and an organic phase containing Fe(III); the obtained eluate containing V(IV) was acidified with sulfuric acid to obtain an acidified eluate containing V(IV) , Containing V (IV) H in acidifi...

Example Embodiment

[0078] Example 3

[0079] step one

[0080] After removing aluminum, containing V4.57g / L, Fe T 8.41g / L, Fe(III) 2.62g / L lime coal acid leaching solution 2500ml, stir and add ammonia water to adjust the pH value to 1.3, filter, the filtrate uses Cyanex272-TBP-kerosene system as the organic phase, the concentration of Cyanex272 in the organic phase 10v / v%, according to O / A (volume ratio of organic phase to water phase) = 1:2 for five-stage contact extraction to remove iron, to obtain an organic phase containing Fe(III) and V(IV) and after removing iron The organic phase containing Fe(III) and V(IV) contains Fe 3.48g / L and V0.22g / L; the organic phase containing Fe(III) and V(IV) is first subjected to 0.8 mol / LH 2 SO 4 The solution eluted the co-extracted vanadium to obtain an eluate containing V(IV) and an organic phase containing Fe(III); the obtained eluate containing V(IV) was acidified with sulfuric acid to obtain an acidified eluate containing V(IV) , Containing V (IV) H in aci...

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Abstract

The invention discloses a method for extracting vanadium from stone coal pickle liquor. The technical process mainly comprises the steps of extracting the stone coal pickle liquor subjected to aluminum removal through an acidic phosphate ester extracting agent solvent to remove ferric iron, enriching the vanadium through the acidic phosphate ester extracting agent solvent after the iron is removed and the pH of the liquor is adjusted, neutralizing precipitates with the vanadium-enriched liquor to obtain vanadium dioxide hydrate, refining the vanadium dioxide hydrate, calcining the refined vanadium dioxide hydrate to obtain a vanadium oxide product and the like. The method for extracting the vanadium from stone coal pickle liquor has the advantages of short technical flow, low consumption of reagents, low production cost, high product quality, environment friendliness and the like.

Description

technical field [0001] The invention relates to a method for extracting vanadium from stone coal acid leaching solution, belonging to the technical field of vanadium metallurgy. Background technique [0002] Stone coal is a vanadium-containing polymetallic metallurgical mineral raw material, which contains elements such as vanadium, iron, aluminum, silicon, and carbon, among which iron exists in the form of Fe(III) and Fe(II). During the sulfuric acid leaching process of stone coal, vanadium, iron, aluminum, etc. enter the solution together. When the molar ratio of Fe(III) / Fe(II) in the solution is 1:0.1-10, the vanadium in the solution is almost all V(IV). The presence of iron in solution, especially ferric iron, is extremely harmful to the separation and enrichment of vanadium. Therefore, in order to eliminate the influence of ferric iron, stone coal acid leaching solution usually adopts the following process to separate and enrich vanadium: [0003] 1) Stone coal sulfu...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/38
CPCY02P10/20
Inventor 王学文马艺骞王明玉刘学辉
Owner CENT SOUTH UNIV
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