A blast furnace type design method for smelting vanadium-titanium magnetite

A blast furnace furnace type, vanadium-titanium ore technology, applied in the direction of the internal form, etc., can solve the problems of not being able to provide drop height, unfavorable blast furnace straight line, insufficient hearth heat, etc., to reduce the furnace body angle, pressure and friction Reduce and ensure the effect of metallurgical effect

Active Publication Date: 2017-03-01
HEBEI IRON AND STEEL
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  • Description
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  • Application Information

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Problems solved by technology

However, due to the low position of the refractory zone of vanadium-titanium ore, which is close to the tuyere, it cannot provide sufficient dripping height during the iron particle dripping process, the heating space is small, the heat capacity is small, and the heat brought into the hearth is insufficient. When the furnace condition fluctuates slightly , the furnace temperature changes greatly, which is not conducive to the smooth operation of the blast furnace

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  • A blast furnace type design method for smelting vanadium-titanium magnetite

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Effect test

Embodiment 1

[0024] at 2500m 3 Taking vanadium-titanium magnetite smelting blast furnace as an example, the process steps of the blast furnace type design method applicable to vanadium-titanium magnetite smelting are as follows:

[0025] (1) Reduce the shaft angle β: β is reduced from 83.5° to 75.5°;

[0026] (2) Increase the tuyere height h f : Slag mouth height h z and tuyere height h f The ratio takes a value of 0.2.

[0027] By adopting the method of this embodiment, the utilization factor of the blast furnace is increased from 2.45 in the existing blast furnace type design to 2.60.

Embodiment 2

[0029] at 2000m 3 Taking vanadium-titanium magnetite smelting blast furnace as an example, the process steps of the blast furnace type design method applicable to vanadium-titanium magnetite smelting are as follows:

[0030] (1) Reduce the shaft angle β: β is reduced from 85.5° to 80.0°;

[0031] (2) Increase the tuyere height h f : Slag mouth height h z and tuyere height h f The value of the ratio is 0.4.

[0032] By adopting the method of this embodiment, the utilization factor of the blast furnace is increased from 2.50 in the existing blast furnace type design to 2.65.

Embodiment 3

[0034] at 2000m 3 Taking vanadium-titanium-magnetite smelting blast furnace as an example, the process steps of the blast furnace type design method applicable to vanadium-titanium-magnetite smelting are as follows:

[0035] (1) Reduce the shaft angle β: β is reduced from 85.5° to 78.5°;

[0036] (2) Increase the tuyere height h f : Slag mouth height h z and tuyere height h f The value of the ratio is 0.3.

[0037] By adopting the method of this embodiment, the utilization factor of the blast furnace is increased from 2.50 in the existing blast furnace type design to 2.62.

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Abstract

The invention discloses a blast furnace profile for vanadium titano-magnetite smelting. A furnace body angle beta of the blast furnace profile is 75.5-80.0 degrees; and a wind gap height hf can be further increased to enable a ratio k of a slag port height hz to the wind port height hf to be in a range of 0.2-0.4, so that the blast furnace profile is more suitable for the characteristics of severe volume expansion and low soft melting band position in low-temperature reduction degradation of a vanadium-titanium sintered ore. The method relieves the influence degree of the furnace temperature change on the furnace condition caused by external factors, increases the breathability of a center material column, guarantees the metallurgy effect of furnace slag in a furnace hearth, reduces the furnace condition fluctuation, and achieves the purposes of enhancing the material column breathability, increasing the coal spraying ratio, stabilizing the furnace condition, intensifying the smelting and improving the yield.

Description

technical field [0001] The invention belongs to the technical field of vanadium-titanium-magnetite metallurgy, and in particular relates to a blast furnace type design method, especially a blast furnace type design method suitable for vanadium-titanium-magnetite smelting. Background technique [0002] The blast furnace type consists of five parts: hearth, bosh, waist, body and throat. Whether the blast furnace type is reasonable or not has a great influence on the blast furnace smelting process. A reasonable furnace type design is the basis for obtaining good technical and economic indicators and ensuring the smooth operation of the blast furnace, and is a key factor for increasing production and reducing fuel consumption. At present, the type of blast furnace used for smelting vanadium-titanium ore is exactly the same as that used for smelting ordinary ore. The design of blast furnace for smelting ordinary ore is very reasonable after long-term practice and continuous impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/02
Inventor 刘杰白银舰白瑞国李兰杰
Owner HEBEI IRON AND STEEL
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