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Method for reducing chromium content in calcium vanadate

A technology of chromium content and calcium vanadate, applied in the field of metallurgy, can solve the problems of high content of calcium vanadate and chromium, no removal or reduction of calcium vanadate, unfavorable preparation of vanadium oxide, etc., and achieves the reduction of chromium content and mild conditions. , the effect of low cost

Active Publication Date: 2018-04-27
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium salt vanadium precipitation method is one of the methods for selectively separating vanadium from vanadium chromium solution, but the obtained calcium chromium vanadate has a high content, which is not conducive to the further preparation of vanadium oxide products
[0003] At present, there is no relevant report on the method of removing or reducing the chromium content in calcium vanadate, and it is necessary to develop a process technology for reducing the chromium content in calcium vanadate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take high chromium vanadate calcium (V 2 o 5 40.43%, Cr 2 o 3 0.63%, CaO 48.32%) 200g, add 600mL water, 55g sodium carbonate, stir and react at 90°C for 90min, and separate solid and liquid to obtain 213.5g of low chromium calcium vanadate, wherein Cr 2 o 3 The content is 0.15%.

Embodiment 2

[0035] Take high chromium vanadate calcium (V 2 o 5 40.43%, Cr 2 o 3 0.63%, CaO 48.32%) 200g, add 800mL water, 58g sodium bicarbonate, stir and react at 70°C for 60min, and separate solid and liquid to obtain 217.4g of low chromium calcium vanadate, wherein Cr 2 o 3 The content is 0.13%.

Embodiment 3

[0037] Take high chromium vanadate calcium (V 2 o 5 40.43%, Cr 2 o 3 0.63%, CaO 48.32%) 200g, add 1200mL water, 68g ammonium bicarbonate, stir and react at 70°C for 30min, and separate solid and liquid to obtain 221.4g low chromium calcium vanadate, in which Cr 2 o 3 The content is 0.12%.

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Abstract

The invention discloses a method for reducing chromium content in calcium vanadate and belongs to the technical field of metallurgy. The method is used for significantly reducing the chromium contentin the calcium vanadate to solve the technical problem that the content of chromium in existing calcium vanadate is relatively high, thereby going against further preparing of vanadium oxide products.The method for reducing the chromium content in calcium vanadate includes the following steps that (1), high-chromium calcium vanadate added water is beaten to obtain a slurry; and (2), a chromium remover is added to the slurry, after stirring and reaction, solid-liquid separation is achieved, and low-chromium calcium vanadate and chromium-removing solution are obtained. The method for reducing the chromium content in the calcium vanadate can effectively reduce the chromium content in the calcium vanadate by controlling the amount of the chromium remover and reaction conditions, vanadium recovery rate is not affected at the same time, the vanadium and the chromium in the chromium-removing solution can be recovered, and waste of resources is avoided; and the method for reducing the chromium content in the calcium vanadate is simple in operation, mild in conditions, and low in cost, and industrialization achievement is facilitated.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for reducing the chromium content in calcium vanadate. Background technique [0002] The Panxi area is rich in vanadium-titanium magnetite resources and is the largest vanadium-titanium resource in my country. Among them, the Hongge Mine is divided into the South Mine and the North Mine. It is the only mining area that has not yet been developed and utilized on a large scale among the four major vanadium-titanium magnetite ore areas in Panxi (Taihe Mine, Baima Mine, Panzhihua Mine, and Hongge Mine). The grades of iron and vanadium in the original ore of Honggnan Mine are equivalent to those in other mining areas in Panxi, but the grade of chromium is 8 to 10 times that of other mining areas. Studies have shown that "blast furnace ironmaking-converter furnace to extract vanadium and chromium" is currently the most promising process for industrialization. U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/32C22B34/22C22B7/00C01G31/00
CPCC01G31/00C22B7/00C22B34/22C22B34/32Y02P10/20
Inventor 付自碧蒋霖李明高官金伍珍秀
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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