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Vanadium-titanium magnetite blast furnace smelting method

A technology for vanadium titanomagnetite and blast furnace smelting, which is applied in the field of blast furnace smelting, can solve the problems of increasing the inactive area of ​​the hearth, the difficulty of hot air blowing through the center of the hearth completely, and the thickness of the furnace wall, so as to avoid slag iron. The effect of poor fluidity, improvement of gas and liquid permeability of material column, and improvement of metallurgical properties of slag

Active Publication Date: 2020-01-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

The above characteristics also lead to high pressure difference, thick furnace wall, hearth sticking, hearth center accumulation, air flow disorder and uncontrollable phenomenon in the process of smelting high-titanium vanadium-titanium magnetite in blast furnace.
Especially for the effective volume of 1750m 3 For the blast furnace above, the diameter of the hearth increases, the hot air is difficult to completely blow through the center of the hearth, and the inactive area of ​​the hearth increases.
In the event of an emergency wind shutdown caused by equipment failure or other reasons, air flow disorder is very likely to occur. After the wind is resumed, the furnace condition is difficult to recover for a long time, and even gradually deteriorates, causing tens of millions of economic losses.

Method used

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  • Vanadium-titanium magnetite blast furnace smelting method

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Embodiment 1

[0025] A blast furnace smelted with vanadium-titanium magnetite as the main raw material, after an emergency shutdown of the blast furnace, the gas flow distribution was unstable, and due to improper adjustment measures, the furnace condition further deteriorated, resulting in long-term abnormality of the blast furnace condition, resulting in severe economic losses.

[0026] After analyzing and judging in many aspects, it is shown that serious central accumulation and edge bonding have occurred in the furnace, and the method of the present invention is used to recover the furnace condition.

[0027] Ore distribution adjustment: stop using high TiO 2 content of vanadium-titanium pellets, the mass ratio of vanadium-titanium sintered ore is increased to 80% to 85%, and the mass ratio of lump ore is increased to 15% to 20%. The lump ore is divided into two parts, one part does not contain TiO 2 And the iron ore with an iron grade ≥ 50% is a part of manganese-containing lump ore;...

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Abstract

The invention discloses a vanadium-titanium magnetite blast furnace smelting method, and belongs to the technical field of blast furnace smelting. The vanadium-titanium magnetite blast furnace smelting method is provided to eliminate the situation that furnace conditions of vanadium-titanium magnetite blast furnace smelting is not smooth. By adjusting magnetite distribution, a slagging system, a heat system and an air supply system, the fluidity of slag iron is improved, the working state of a furnace cylinder is stabilized, the gas permeability and liquid permeability of a material column areimproved, reasonable distribution of blast furnace gas flow is promoted, and rapid recovery of the furnace conditions of a blast furnace is promoted.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting, and in particular relates to a blast furnace smelting method of vanadium-titanium magnetite. Background technique [0002] In the smelting process of high-titanium vanadium-titanium magnetite, there are high low-temperature pulverization rate of sintered ore in the furnace, low grade of comprehensively fed iron, large amount of iron slag per ton, low position of refractory zone, and thick slag layer in refractory zone. , High gas permeability resistance index, high melting temperature of slag, TiO in slag 2 High content, TiO in slag 2 It is easy to be over-reduced by coke to form Ti (C, N) with high melting point, large air volume, high bosh gas index and other production and smelting characteristics. The above characteristics also lead to high pressure difference, thick furnace wall, hearth sticking, accumulation in the hearth center, and uncontrollable air flow disorder in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/008
Inventor 郑魁
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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