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Ferrotitanium reducing material for maintaining blast furnace and preparation method thereof

A raw material, ferrotitanium technology, applied in the field of ferrotitanium reduction raw materials for blast furnace maintenance and its preparation, can solve the problems of reduction, inability to meet blast furnaces, increase in production cost, etc., and achieve the effect of reducing cost, improving effect, and increasing titanium content

Inactive Publication Date: 2010-12-22
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to overcome the reduction of the effect of using vanadium-titanium ore to protect the furnace at present, which cannot meet the requirements of blast furnace operation and maintenance, and the method of using titanium wire to feed titanium dioxide or vanadium-titanium ore from the tuyere to protect the furnace leads to production. Insufficient cost increase, providing a method of semi-metallizing titanium dioxide or vanadium-titanium ore, and then directly dissolving semi-metallized raw materials into molten iron to increase the content of titanium in molten iron, so as to improve the service life of the blast furnace hearth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Ferro-titanium reduction raw material for blast furnace maintenance, its components and weight percentages are: vanadium ilmenite powder: 75%, titanium oxide powder: 20%, sodium bentonite powder: 3%, carbon powder: 2%; the above The particle size of each component is ≤0.074mm.

[0021] A method for preparing ferrotitanium reduction material for blast furnace maintenance, the steps of which are:

[0022] 1) The above-mentioned vanadium-titanite powder with a particle size of ≤0.074 mm: 75%, titanium oxide powder: 15%, sodium-based bentonite powder: 5%, carbon powder: 5%, and 0.01% hydroxyethyl fiber mix evenly;

[0023] 2) Carrying out pelletizing: in the pelletizing, the method of rotating while spraying water is adopted, and the amount of water added is 8% of the total weight of the above-mentioned raw materials;

[0024] 3) Baking: the baking temperature is 1080-1085°C, and the baking time is 35 minutes;

[0025] 4) Firing: firing at 1220-1285°C, at this temperatur...

Embodiment 2

[0029] Ferro-titanium reduction raw material for blast furnace maintenance, its components and weight percentages are: vanadium ilmenite powder: 90%, titanium oxide powder: 5%, sodium bentonite powder: 2%, carbon powder: 3%; the above The particle size of each component is ≤0.074 mm.

[0030] A method for preparing ferrotitanium reduction material for blast furnace maintenance, the steps of which are:

[0031] 1) The above-mentioned vanadium-titanite powder with a particle size of ≤0.074 mm: 90%, titanium oxide powder: 5%, sodium-based bentonite powder: 2%, carbon powder: 3%, and 0.03% hydroxyethyl fiber mix evenly;

[0032] 2) Carrying out pelletizing: in pelletizing, it is carried out by spraying water while rotating, and the amount of water added is 9.5% of the total weight of the above-mentioned raw materials;

[0033] 3) Baking: the baking temperature is 1090-1095°C, and the baking time is 30 minutes;

[0034] 4) Firing: firing at 1230-1235°C, at this temperature the r...

Embodiment 3

[0038] Ferro-titanium reduction raw material for blast furnace maintenance, its composition and weight percentage are: vanadium ilmenite powder: 80%, titanium oxide powder: 6%, sodium-based bentonite powder: 4%, carbon powder: 10%, the above The particle size of each component is ≤0.074mm.

[0039] A method for preparing ferrotitanium reduction material for blast furnace maintenance, the steps of which are:

[0040] 1) Mix the vanadium-titanite powder with the above particle size ≤0.074 mm: 80%, titanium oxide powder: 6%, sodium bentonite powder: 4%, carbon powder: 10%;

[0041] 2) Carrying out pelletizing: in the pelletizing process, the method of rotating while spraying water is adopted, and the amount of water added is 8.5% of the total weight of the above-mentioned raw materials;

[0042] 3) Baking: the baking temperature is 1100-1105°C, and the baking time is 25 minutes;

[0043] 4) Firing: firing at 1250-1255°C, at this temperature the residence time of the pellets in ...

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Abstract

The invention relates to a ferrotitanium reducing material for maintaining a blast furnace and a preparation method thereof. The ferrotitanium reducing material for maintaining the blast furnace comprises the following main components in percentage by weight: 75 to 90 percent of vanadium ilmenite powder, 5 to 20 percent of titanium oxide powder, 2 to 5 percent of sodium bentonite powder and 0.1 to 10 percent of carbon powder, wherein the granularity of each component is less than or equal to 0.074 mm. The preparation method comprises the following steps of: mixing the raw materials uniformly; palletizing in a mode of spraying water while rotating; roasting at the temperature of between 1,080 and 1,120 DEG C; firing at the temperature of between 1,220 and 1,300 DEG C; cooling to the normal temperature; pulverizing pellets until the granularity is less than or equal to 0.074 mm; and sealing for later use. In the method, the semi-metallized titanium pellet-containing reducing material is pulverized to be fine powder and the fine powder is added into the blast furnace from a tuyere or an iron notch, so the titanium content of liquid iron can be increased, a vanadium-titanium protection effect on the blast furnace is improved, the service life of a hearth of the blast furnace is prolonged, and the cost of the traditional vanadium-titanium furnace protection is reduced.

Description

technical field [0001] The invention relates to a reducing material and a preparation method, in particular to ferrotitanium reducing material used for blast furnace maintenance and a preparation method thereof. Background technique [0002] The use of vanadium-titanium ore to protect the furnace is an important measure for the longevity of the blast furnace. Keeping a certain amount of titanium in the blast furnace charge can improve the titanium content in the molten iron and form a high-viscosity dead iron layer on the inner surface of the furnace lining, thus maintaining the safety of the blast furnace; Generally, 3-5 kg / ton of iron is used for titanium dioxide in the charge of blast furnace maintenance to produce the effect, and under abnormal circumstances, 10-20 kg / ton of iron is used to produce the effect, resulting in increased production costs. With the intensification of blast furnace smelting, the conditions of vanadium-titanium furnace protection have also chang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C22B1/14
Inventor 徐国涛熊亚非李怀远李淑忠
Owner 武钢集团有限公司
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