Direction reduction and electric furnace smelting-separation preparation process of vanadium-titanium magnetite cold bound pellet

A technology of vanadium-titanium magnetite and vanadium-titanium magnetite, applied in electric furnaces, furnaces, furnace types, etc., can solve the problem of low drying temperature of cold-consolidated carbon-containing pellets, low preheating burst reduction time, C/Fe To solve the problem of high ratio, to achieve the effect of reducing a large amount of pollution, reducing the overall cost of the product, and achieving a good effect

Inactive Publication Date: 2006-07-19
鲜帆 +2
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The method of the present invention is to comprehensively utilize iron, vanadium, titanium, and chromium in vanadium-titanium magnetite, economically obtain reducing agent resources, and solve the problem of low drying temperature, poor drop strength, and medium-high temperature preheating burst of cold-consolidated carbon-containing pellets And the reduction time is long, the C / Fe ratio is high, the energy consumption is big and the utilization rate is low etc., propose the production method that the present invention is suitable for industrialized operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 This scheme is implemented in the coke oven gas comprehensive utilization project in Panzhihua, Sichuan. -200 mesh 55% vanadium-titanium magnetite concentrate (red grid ore: V 2 o 5 0.67%, Cr 2 o 3 : 1.3%, TiO 2 12.5%), -200 mesh 70% anthracite fine coal powder, -200 mesh 99% high-efficiency bentonite, -180 mesh 50% humate, respectively in proportions of 76.0%, 22.25%, 1.0%, and 0.75%. After mixing and grinding, the batch materials enter the pelletizing machine to form 12mm cold-solidified carbon-containing pellets. Before pelletizing, the moisture content of the material is 7.5%, the moisture content of the pellets is 9.5%, and the C / Fe ratio of the pellets is 0.39. The drying temperature of the cold-consolidated carbon-containing pellets is 300°C, the preheating temperature is 980°C, the reduction temperature is 1250°C, the preheating-reduction time is 80 minutes, the metallization rate of the reduced pellets is 93.0%, and the residual carbon content is ...

Embodiment 2

[0018] Example 2 This scheme is implemented in the coke oven gas comprehensive utilization project in Panzhihua, Sichuan. -200 mesh 65% vanadium-titanium magnetite concentrate (Panzhihua Miyi Baima ore, chrome-free, V 2 o 5 0.78%, TiO 210%) and -180 mesh 70% anthracite clean coal powder and -200 mesh more than 99% high-efficiency bentonite, -180 mesh 50% humate in proportions of 76.5%, 22%, 1.0%, and 0.5% respectively. After mixing and grinding, the batch materials enter the pelletizing machine to form 10mm cold-solidified carbon-containing pellets. The moisture content of the material before pelletizing is 7.0%, the moisture content of the pellets is 9.5%, and the C / Fe ratio of the pellets is 0.38. The drying temperature of the cold-consolidated carbon-containing pellets is 500°C, the preheating temperature is 1050°C, the reduction temperature is 1225°C, the preheating-reduction time is 90 minutes, the metallization rate of the reduced pellets is 95.0%, and the residual car...

Embodiment 3

[0019] Example 3 This scheme is implemented in the coke oven gas comprehensive utilization project in Panzhihua, Sichuan. -200 mesh 70% vanadium-titanium magnetite concentrate (Panzhihua Miyi Baima ore, chromium-free, V 2 o 5 0.83%, TiO 2 8.0%) and -200 mesh 40% titanium concentrate (TFe34%, TiO 2 47.5%), -180 mesh 70% lean lean fine coal powder, -180 mesh 70% anthracite fine coal powder, -200 mesh 99% or more high-efficiency bentonite, -180 mesh 50% humate by 58% , 20%, 10%, 10.5%: 0.75%, 0.75% ratio ingredients. After mixing and grinding, the batch materials enter the pelletizing machine to form 14mm cold-solidified carbon-containing pellets. The moisture content of the material before pelletizing is 7.0%, the moisture content of the pellets is 9.5%, and the C / Fe ratio of the pellets is 0.37. The drying temperature of the cold-consolidated carbon-containing pellets is 600°C, the preheating temperature is 890°C, the reduction temperature is 1200°C, the preheating-reductio...

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Abstract

The cooled agglomerated carbon-contained pellet prepared with vanadium titano magnetite concentrate and opposite direct reduction with former pellet comprises: mixing the concentrate, reducer and bonding agent, drying, grinding, and pelletizing to obtain the cooled agglomerated carbon-contained pellet drying and sieving into the reduction furnace with reducer for reduction atmosphere; loading the reduced pellet into electric furnace to melt and separate the iron liquid, V, Ti and Cr. This invention is fit to the pellet on wide application temperature and low energy consumption, has well efficiency and low running cost, and can also extract V, Ti Fe and Cr from electric furnace with high yield and obvious environmental protection.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of environment-friendly ironmaking in the metallurgical industry. It is especially suitable for the preparation of vanadium-titanium-magnetite cold-solidified carbon-containing pellets and the production methods of direct reduction and electric furnace melting. The method is a production method for vanadium-titanium-magnetite composite ore by adopting pelletizing, direct reduction and extraction of metals such as vanadium, titanium, iron and chromium. Background technique [0002] China's iron ore resources are mainly concentrated in Anshan, Hebei, and Panxi. The vanadium-titanium magnetite resource in Panxi area is a strategic resource in China. China's total titanium resources account for 38.85% of the world's total, of which 90.3% are in the Panxi area. 98% of the world's vanadium resources exist in the form of vanadium-titanium magnetite, and China's total vanadium resourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C21B13/12
Inventor 鲜帆杨定国孙建坤
Owner 鲜帆
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