Method for comprehensively smelting sefstromite

A technology of vanadium ilmenite and vanadium-titanium, which is applied to furnace types, furnaces, electric furnaces, etc., can solve the problems of low content, affecting vanadium recovery rate and economic benefits, etc., and achieves improved recovery rate, good economic benefits, and effective The effect of using

Active Publication Date: 2010-12-08
WUKUN STEEL
View PDF4 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the existing blast furnace-converter process flow, because it cannot be smelted with 100% vanadium-titanium magnetite, it will eventually lead to V in the converter vanadium slag. 2 o 5 The content is ...

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

[0026] The method for comprehensively smelting vanadium-titanium iron ore provided by the invention, through the following steps:

[0027] A. With TFe content of 67.14%, SiO 2 The content is 2.29%, V 2 o 5 The content is 0.32%, TiO 2 Vanadium-titanium-iron concentrate with a content of 1.62% is used as raw material, and mixed with coal powder with a mass ratio of 33% and quicklime powder with a mass ratio of 13%. In the process, the vanadium-titanium sponge iron is directly reduced by conventional heating to 1100-1150°C, and the mass composition of the reduced vanadium-titanium sponge iron is: TFe: 73.44%, SiO 2 : 6.43%, C: 4.37%, V 2 o 5 : 0.27%, TiO 2 : 4.59% Metallization rate is 93.04%;

[0028] B. Utilize 3 tons of electric furnace to smelt 10 tons of vanadium-titanium sponge iron in step A, and smelt it according to the step-by-step smelting method of adding materials in four times, and simultaneously press the SiO in the vanadium-titanium sponge iron 2 In terms ...

Embodiment 2

[0034] The method for comprehensively smelting vanadium-titanium iron ore provided by the invention, through the following steps:

[0035] A. With TFe content of 60.84%, SiO 2 The content is 2.96%, V 2 o 5 The content is 0.85%, TiO 2 Vanadium-titanium-iron concentrate with a content of 5.38% is used as raw material, and coke powder with a mass ratio of 35% and quicklime powder with a mass ratio of 14% are mixed, placed on a trolley after mixing, and sent to a tunnel kiln In the process, the vanadium-titanium sponge iron is directly reduced by conventional heating to 1100-1150°C, and the mass composition of the reduced vanadium-titanium sponge iron is: TFe: 76.88%, SiO 2 : 5.26%, C: 0.53%, V 2 o 5 : 0.93%, TiO 2 : 6.75%, the metallization rate is 91.43%;

[0036] B. Utilize 3 tons of electric furnace to smelt 10 tons of vanadium-titanium sponge iron in step A, and smelt it according to the step-by-step smelting method of adding materials in three times, and press the SiO...

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 provides a method for comprehensively smelting sefstromite. The method fundamentally solves the problem that the vanadium content in molten iron is difficult to increase so as not to finally extract vanadium, a valuable resource, because the conventional blast furnace smelting cannot utilize one hundred percent sefstromite by directly reducing the one hundred percent sefstromite into vanadium-titanium sponge iron by a tunnel kiln direct reduction method. The method comprises the following steps of: when the vanadium-titanium sponge iron is smelted in an electric furnace, first reducing V2O5 in slag and putting the V2O5 into steel by controlling a reducing atmosphere and then scratching away oxides of difficultly reduced elements such as Si, Al, Ti, Ca, Mg and the like along with the slag to obtain high titanium slag; and oxidizing the vanadium in the molten steel into the slag by oxidizing and blowing to improve the V2O5 content in the slag so as to provide guarantee for subsequent vanadium extraction from the slag and extremely improve the recovery rate and the recovery economic value of the vanadium. The method can also produce high-quality molten steel for developing steel grade with high added value, so the valuable resource, namely the sefstromite can be fully, effectively and rationally utilized.

Description

technical field [0001] The invention relates to a method for smelting vanadium-ilmenite ore, in particular to a method for comprehensively smelting vanadium-ilmenite ore, belonging to the technical field of iron and steel smelting. technical background [0002] Direct reduction ironmaking technology refers to the production process in which iron ore is reduced to sponge iron below the melting temperature. It is the development direction of ironmaking technology in the future, and it is also a major technological innovation project encouraged and supported by national industrial policies. one. According to the classification of the reducing agent used, the direct reduction ironmaking technology can be divided into two categories: the gas-based method using gas as the reducing agent, and the coal-based method using coal as the reducing agent. At present, more than 80% of direct reduced iron in the world is produced by the gas-based method using gas as a reducing agent, and th...

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
IPC IPC(8): C21B13/00C21C5/54
Inventor 杨雪峰卫修阳章祝雄朱锡森李轶赵红全温海滨
Owner WUKUN STEEL
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