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Method for blast furnace smelting of vanadium titanium magnetite

A vanadium titanomagnetite and blast furnace smelting technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of high melting temperature, difficult separation of slag and iron, reduce fuel ratio, reduce iron in slag, and more good separation effect

Inactive Publication Date: 2014-09-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of high melting temperature of high-titanium slag and difficult separation of slag and iron in the prior art, and provide a new method for blast furnace smelting of vanadium-titanium magnetite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment is used to illustrate the blast furnace smelting method of vanadium-titanium magnetite of the present invention.

[0027] Add 70 parts by weight of vanadium-titanium sinter, 8 parts by weight of ordinary hematite lump ore, 22 parts by weight of vanadium-titanium pellets and coke to 1200m 3 At the same time, coal powder with a particle diameter of about 74 microns (60 wt% anthracite + 40 wt% lean coal) and fluorspar powder with a particle diameter of 0.05mm are injected through the tuyere of the blast furnace at a weight ratio of 1:0.03 Into the blast furnace, the carrier gas used for injection is compressed air, the temperature of the compressed air is 15°C, and the pressure is 900kPa.

[0028] The injection amount of pulverized coal is about 120kg / ton of iron. The blast furnace tuyere temperature (that is, air temperature) is controlled at 1220°C, and the furnace top pressure is controlled at 137kPa.

[0029] In the above smelting process, the iron co...

Embodiment 2

[0031] This embodiment is used to illustrate the blast furnace smelting method of vanadium-titanium magnetite of the present invention.

[0032] Add 70 parts by weight of vanadium-titanium sinter, 8 parts by weight of ordinary hematite lump ore, 22 parts by weight of vanadium-titanium pellets and coke to 1200m 3 At the same time, pulverized coal with a particle diameter of about 100 microns (60% bituminous coal + 40% lignite by weight) and fluorite powder with a particle diameter of 0.08mm are injected into the blast furnace at a weight ratio of 1:0.04. In the blast furnace, the carrier gas used for injection is compressed air, the temperature of the compressed air is 25°C, and the pressure is 1200kPa.

[0033] The injection amount of pulverized coal is about 120kg / ton of iron. The blast furnace tuyere temperature (that is, air temperature) is controlled at 1250°C, and the furnace top pressure is controlled at 120kPa.

[0034] In the above smelting process, the iron content ...

Embodiment 3

[0036] This embodiment is used to illustrate the blast furnace smelting method of vanadium-titanium magnetite of the present invention.

[0037] Add 70 parts by weight of vanadium-titanium sinter, 8 parts by weight of ordinary hematite lump ore, 22 parts by weight of vanadium-titanium pellets and coke to 1200m 3 At the same time, coal powder with a particle diameter of about 50 microns (60 wt% lean coal + 40 wt% bituminous coal) and fluorspar powder with a particle diameter of 0.09mm are injected through the tuyere of the blast furnace according to the weight ratio of 1:0.01 Into the blast furnace, the carrier gas used for injection is compressed air, the temperature of the compressed air is 10°C, and the pressure is 800kPa.

[0038] The injection amount of pulverized coal is about 120kg / ton of iron. The blast furnace tuyere temperature (that is, air temperature) is controlled at 1200°C, and the furnace top pressure is controlled at 200kPa.

[0039] In the above smelting pro...

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Abstract

The invention discloses a method for blast furnace smelting of a vanadium titanium magnetite, and is characterized in that the method comprises the steps: in the process of blast furnace smelting of the vanadium titanium magnetite, spraying and blowing a fuel and a fluorite powder into a blast furnace through an air port. With adopting of the method for blast furnace smelting of the vanadium titanium magnetite, the content of iron in slag iron can be significantly reduced, and the total fuel ratio can be reduced.

Description

technical field [0001] The invention relates to a blast furnace smelting method of vanadium-titanium magnetite. Background technique [0002] At present, the blast furnace smelting method of vanadium-titanium magnetite usually mainly includes: sintering vanadium-titanium iron concentrate and ordinary powder ore to produce sintered ore, and using vanadium-titanium-iron concentrate and ordinary iron concentrate to produce pellets, Then put sinter, pellets and a small amount of lump ore into the blast furnace together with coke in a certain proportion, and at the same time, pulverized coal is injected through the tuyere of the blast furnace and air is blown in to burn the coke and the pulverized coal injected to form Reducing gases (mainly CO and H 2 ), the reducing gas removes the oxygen in the vanadium-titanium magnetite during the process of rising in the furnace, reduces it to obtain iron, and then melts and drops to the hearth to realize the separation of slag and iron, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCY02P10/143
Inventor 付卫国文永才谢洪恩何木光陆高峰王敦旭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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