Phosphorus-eliminating purification process of vanadium-containing chamotte leachate

A technology of leaching liquid and vanadium clinker, which is applied in the field of wet vanadium extraction, can solve the problems of reduced vanadium conversion rate of roasting materials, low vanadium leaching rate, uneven mixing, etc., achieves good effect, significant economic benefits, and low vanadium loss Effect

Inactive Publication Date: 2004-06-23
攀枝花钢铁有限责任公司钢铁研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. Return to the production line to recover vanadium, mix it with raw materials for roasting, not only need to be dried and crushed, but also mixed unevenly, local high calcium causes the conversion rate of vanadium of the whole roasted material to decrease
[0008] 4. The acid leaching method recovers vanadium, not only the vanadium leaching rate is low, but also the impurities in the underflow slag re-enter the solution, and the impurity removal and purification will cause new vanadium loss

Method used

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  • Phosphorus-eliminating purification process of vanadium-containing chamotte leachate
  • Phosphorus-eliminating purification process of vanadium-containing chamotte leachate

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Raw materials used, containing [V]35.63g / L, [P]59mg / L, [Fe]28mg / L, [Al]21mg / L, [Si]810mg / L, 50m3 vanadium-containing clinker leach solution with pH 10 Enter the mixing tank, turn on the steam heating at the same time, when the vanadium-containing clinker leachate is sufficient, turn on the compressed air to stir, and quantitatively add the prepared phosphorus removal purifier solution 0.9m 3 (about 80kg), continue heating and stirring to make it fully react, and stir for another 10 minutes when the solution reaches 80±5°C, then add 50 liters of polyacrylamide solution with a concentration of 3g / l, stir for 10 minutes, and mix well Input to the clarification tank to settle, and obtain [V]35.51g / L, [P]<10mg / L, [Fe]<10mg / L, [Al]<10mg / L, [Si]281mg / L purified vanadium liquid , The underflow slag produced by pressure filtration contains 8.27% of ∑V, 6.38% of acid-soluble vanadium, 1.89% of insoluble vanadium, and 2.37% of P.

Embodiment 2

[0031] Raw materials used, containing [V] 27.46g / L, [P] 39mg / L, [Fe] 23mg / L, [Al] 19mg / L, [Si] 785mg / L, pH 9.5 Vanadium-containing clinker leachate 50m 3 Enter the mixing tank, turn on the steam heating at the same time, when the vanadium-containing clinker leachate is sufficient, turn on the compressed air to stir, and quantitatively add the prepared phosphorus removal purifier solution 0.8m 3 (about 71kg), continue to heat and stir to make it fully react, and stir for another 10 minutes when the solution reaches 80±5°C, then add 50 liters of polyacrylamide solution with a concentration of 3g / L, stir for 10 minutes, and mix well Input it into the clarification tank to settle, and obtain [V]27.34g / L, [P]<10mg / L, [Fe]<10mg / L, [Al]<10mg / L, [Si]298mg / L purified vanadium liquid , The underflow slag produced by pressure filtration contains 7.65% of ∑V, 6.03% of acid-soluble vanadium, 1.62% of insoluble vanadium, and 2.24% of P.

Embodiment 3

[0033] Raw materials used, containing [V] 33.50g / L, [P] 61mg / L, [Fe] 25mg / L, [Al] 18mg / L, [Si] 698mg / L, pH 10 vanadium-containing clinker leachate 50m 3 Enter the mixing tank, turn on the steam heating at the same time, when the vanadium-containing clinker leachate is sufficient, turn on the compressed air to stir, and quantitatively add the prepared dephosphorization purifying agent solution 0.85m 3 (about 76kg), continue to heat and stir to make it fully react, and stir for another 10 minutes when the solution reaches 80±5°C, then add 50 liters of polyacrylamide solution with a concentration of 3g / L, stir for 10 minutes, and mix well Input it into the clarification tank to settle, and obtain [V]33.39g / L, [P]<10mg / L, [Fe]<10mg / L, [Al]<10mg / L, [Si]244mg / L purified vanadium liquid , The underflow slag produced by pressure filtration contains 8.81% of ∑V, 6.81% of acid-soluble vanadium, 1.92% of insoluble vanadium, and 3.75% of P.

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Abstract

The phosphorus-eliminating purification process of vanadium-containing chamotte leachate includes compounding solution with crystalline aluminum chloride and crystalline calcium chloride in certain ratio; mixing the solution with vanadium-containing chamotte leachate via stirring, adding flocculant while stirring, stagnation to precipitate and to obtain supernatant purified vanadium compound solution and bottom flow liquid, pressure filtering the bottom liquid to separate filter residue and filtrate and produce bottom flow residue, and merging the filtrate into the purified vanadium compound solution. The present invention has the advantages of low insoluble vanadium compound content in the bottom flow residue, less vanadium loss, easy recovering of vanadium in the filter residue, obvious phosphorus-eliminating effect, etc.

Description

technical field [0001] The invention relates to the technical field of vanadium extraction by wet method, in particular to a phosphorus removal and purification method for vanadium-containing clinker leaching liquid after vanadium extraction. Background technique [0002] In the production process of vanadium trioxide and vanadium pentoxide, phosphorus removal and purification of vanadium-containing solution is essential, and it is required that [P] in vanadium solution after phosphorus removal and purification is less than 0.015g / L, or [P] / [V ] ratio below 0.0007, [Si], [Fe] and [Al] plasma concentration has a certain limit. Otherwise, the product quality is unqualified and the vanadium deposition rate will drop. [0003] Most domestic manufacturers of wet vanadium extraction use calcium chloride alone for phosphorus removal and purification of vanadium-containing clinker or vanadium-containing solution, which is characterized by good phosphorus removal and purification ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44
CPCY02P10/20
Inventor 彭明福刘恢前兰光铭夏清荣李千文李林德陈自清
Owner 攀枝花钢铁有限责任公司钢铁研究院
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