Method for controlling content of vanadium in chromium sesquioxide

A technology of chromium trioxide and chromium hydroxide, which is applied in the field of vanadium and chromium metallurgy, can solve the problems of high cost and complex process of chromium trioxide products, and achieve the effect of simplifying the process and reducing costs

Inactive Publication Date: 2019-01-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is that the process of preparing low-vanadium-content chromium trioxide products in the prior art is complicated and the cost is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 1000mL of vanadium-chromium-containing solution (TV 0.25g / L, TCr 12.74g / L, pH=2.4), add 35g of sodium metabisulfite and use sulfuric acid to control the pH of the reduction system to ≤4, and reduce for 30min; after the reduction reaction is completed, adjust with sodium hydroxide Solution pH=7.5 carries out chromium precipitation, obtains thick chromium hydroxide 63.16g (TV 0.40%, TCr 20.17%, Na 2 O 14.55%); Thick chromium hydroxide is beat and washed twice by liquid-solid ratio 3:1, obtains refined chromium hydroxide 36.67g (TV 0.69%, TCr 34.74%, Na 2 (05.88%); refined chromium hydroxide was calcined at 1250° C. for 2 h, and after pulverization, beating, washing and drying were performed at a liquid-solid ratio of 3:1 to obtain chromium trioxide 16.78 g (TV 0.08%, TCr 67.32%, Na 2 O 0.11%).

Embodiment 2

[0034] Take 1000mL of vanadium-chromium-containing solution (TV 0.29g / L, TCr 15.36g / L, pH=2.5), add 42g of sodium metabisulfite and use sulfuric acid to control the pH of the reduction system to ≤4, and reduce for 30min; after the reduction reaction is completed, adjust with sodium hydroxide Solution pH=8.0 carries out chromium precipitation, obtains thick chromium hydroxide 69.63g (TV 0.42%, TCr 22.06%, Na 2 O 14.15%); Thick chromium hydroxide is beaten and washed twice by liquid-solid ratio 3.5:1, obtains refined chromium hydroxide 43.61g (TV 0.67%, TCr 35.22%, Na 2 (05.04%); refined chromium hydroxide was calcined at 1250° C. for 2 h, after being pulverized, it was beaten, washed, and dried at a liquid-solid ratio of 3:1 to obtain chromium trioxide 20.27 g (TV 0.08%, TCr 67.43%, Na 2 O 0.11%).

Embodiment 3

[0036] Take 1000mL of vanadium-chromium-containing solution (TV 0.36g / L, TCr 18.61g / L, pH=2.3), add 51g of sodium metabisulfite and use sulfuric acid to control the pH of the reduction system to ≤4, and reduce for 30min; after the reduction reaction is completed, adjust with sodium hydroxide Solution pH=8.5 carries out chromium precipitation, obtains thick chromium hydroxide 85.13g (TV 0.42%, TCr 21.86%, Na 2 O 14.70%); thick chromium hydroxide is beat and washed twice by liquid-solid ratio 4:1, obtains refined chromium hydroxide 52.07g (TV 0.68%, TCr 35.74%, Na 2 (03.87%); refined chromium hydroxide was calcined at 1250° C. for 2 h, and after pulverization, beating, washing and drying were carried out at a liquid-solid ratio of 3:1 to obtain 24.67 g of dichromium trioxide (TV 0.09%, TCr 67.52%, Na 2 O 0.11%).

[0037] The invention provides a method for controlling the vanadium content in chromium trioxide. This method can save the technical process of removing vanadium fro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for controlling the content of vanadium in chromium sesquioxide, belongs to the technical field of vanadium and chromium metallurgy, and solves the technical problemsof complicated process for preparing low-vanadium-content chromium sesquioxide products and high cost in the prior art. In the method for controlling the content of vanadium in chromium sesquioxide,vanadium and chromium contained solution is reduced, and the pH of the solution is adjusted within 7-9, so that tetravalent vanadium and trivalent chromium are precipitated to obtain vanadium-contained rough hydrogen chromium oxide; finish hydrogen chromium oxide is obtained through pulping, washing and control of the Na2O content within 3.5-6%; and finally, chromium sesquioxide with lower vanadium content is obtained by calcining, crushing, pulping and washing. The method omits special vanadium removing process, reduces the consumption of energy and reagents needed in the vanadium removing process, simplifies the process, and reduces the cost.

Description

technical field [0001] The invention belongs to the technical field of vanadium and chromium metallurgy, and in particular relates to a method for controlling the vanadium content in chromium trioxide. 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 proces...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C01G37/033C22B34/32
CPCC01G37/033C01P2006/80C22B3/44C22B34/32Y02P10/20
Inventor 付自碧蒋霖
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap