Direct reduction-magnetic separation method of vanadium titanomagnetite

A vanadium-titanium-magnetite and magnetic separation technology is applied in the field of metallurgy, which can solve problems such as in-depth research, and achieve the effects of low reaction temperature, low energy consumption and simple operation.

Inactive Publication Date: 2012-05-02
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there are few reports on the application of direct reduction-high-efficiency separation proce

Method used

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  • Direct reduction-magnetic separation method of vanadium titanomagnetite
  • Direct reduction-magnetic separation method of vanadium titanomagnetite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix vanadium-titanium magnetite and anthracite coal powder according to the mass ratio of 80:20, and then grind them to -0.074mm. According to the mass percentage, add 3% polyvinyl alcohol as a binder, and place the mixture in polyurethane Put it in a ball mill tank, and then put it in a ball mill. After 24 hours of dry mixing, form a block under a molding pressure of 50Mpa to form a billet. Put the billet into a crucible, cover it with coal powder, cover the crucible lid, and put it into a resistance furnace. , reduced at 1350°C for 60min, the C / O molar ratio was 1.2, after the reduction was completed, the reduced product was crushed to -0.074mm, and then put into a magnetic separation tube for magnetic separation under a strong magnetic field of 220KA / m After 10 minutes, the reduction product was separated by magnetic separation to obtain direct reduced iron with an iron grade of 87.41%, and the iron recovery rate reached 94.99%. The metal V content in the magnetic pro...

Embodiment 2

[0028] Mix and dry vanadium-titanium magnetite and anthracite powder according to the mass ratio of 85:15, grind to -0.074mm, add 3% polyvinyl alcohol as a binder according to the mass percentage, and put the mixture in a polyurethane ball mill tank After 24 hours of dry mixing, press molding under the pressure of 30Mpa to form a billet, put the billet into the crucible and cover it with coal powder, cover the crucible lid, put it into the resistance furnace, and heat it at 1300 ℃ reduction for 180min, the C / O molar ratio is 1.4. After the reduction is completed, the reduction rate of the metal obtained after reduction reaches 94.48%. The reduced product is crushed to -0.074mm, and then put into a magnetic separation tube. Magnetic separation was carried out under a strong magnetic field for 10 minutes. After the reduction product was separated by magnetic separation, the iron recovery rate was 90.78%, the V content in the magnetic part was 0.27%, the V content in the non-magne...

Embodiment 3

[0030] Mix and dry the vanadium-titanium magnetite and bituminous coal powder according to the mass ratio of 80:20, grind to -0.074mm, add 3% polyvinyl alcohol as a binder according to the mass percentage, and place the mixture in a polyurethane ball mill After 24 hours of dry mixing, press molding under the pressure of 40Mpa to form a billet, put the billet into the crucible and cover it with coal powder, cover the crucible lid, put it into the resistance furnace, and Reduction at 1250°C for 300 minutes, the C / O molar ratio is 1.2. After the reduction is completed, the reduction rate of the metal obtained after reduction reaches 85.68%. The reduced product is crushed to -0.074mm, and then put into a magnetic separation tube. Magnetic separation was carried out under a strong magnetic field for 10 minutes. After the reduction product was separated by magnetic separation, direct reduced iron with an iron grade of 86.85% was obtained, and the recovery rate was 92.03%. The metal V...

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Abstract

The invention belongs to the technical field of metallurgy and particularly relates to a direct reduction-magnetic separation method of vanadium titanomagnetite. The method comprises the following steps of: grinding iron ore concentrate powder and pulverized coal, evenly mixing and molding; putting a blank into an airtight lidded crucible, and burying the crucible in pulverized coal; directly reducing ferric oxide for 60-300 minutes at 1250-1350 DEG C on the condition that the molar ratio of C to O is 1.2-1.4 so that ferric oxide is deoxidized to generate metal iron, thus obtaining a reduzate of which the metallization rate is 85-94%; and crushing the cooled reduzate, and carrying out magnetic separation to obtain iron powder with a grade of 85-90% and titanium slag containing 60-70% of titanium. By utilizing the technical scheme of the invention, primary separation of iron, vanadium and titanium is realized; after magnetic separation, 60-70% of vanadium in raw materials enters into magnetic products and 60-70% of titanium is remained in non-magnetic products and the iron recovery rate can reach 90-95%.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a direct reduction-magnetic separation separation method of vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is a multi-element symbiotic iron ore mainly composed of iron, vanadium and titanium, accompanied by a variety of valuable elements, such as chromium, cobalt, nickel, copper, scandium, gallium and platinum group elements. Close symbiosis, vanadium occurs in titanomagnetite in the form of isomorphism. my country's reserves of vanadium-titanium magnetite resources rank among the top in the world, mainly distributed in Panxi, Chengde and Ma'anshan. As the region with the most abundant vanadium and titanium resources in my country, Panxi has proven that the prospective reserves of vanadium-titanium magnetite exceed 10 billion tons, including 3.1 billion tons of iron and TiO 2 873 million tons, including V 2 o 5 15.79...

Claims

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Application Information

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IPC IPC(8): B03C1/015C22B1/02
Inventor 薛向欣姜涛夏溢段培宁
Owner NORTHEASTERN UNIV
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