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Method for smelting vanadium-titanium magnetite in blast furnace

A vanadium-titanium magnetite, blast furnace smelting technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of poor air permeability of material column, high pressure difference, etc., achieve suppression of over-reduction, increase gas utilization rate, and improve technical and economic indicators Effect

Active Publication Date: 2012-08-22
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a method for smelting vanadium-titanium magnetite with high strength in a blast furnace. The method adjusts blast kinetic energy, blast volume, blast temperature, controls material speed and blast furnace reaction Temperature and other methods, thereby improving the shortcomings of poor gas permeability and high pressure difference of the material column, realizing the enhanced smelting of vanadium-iron-magnetite in the blast furnace, and improving the utilization factor of the blast furnace and reducing the iron loss

Method used

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  • Method for smelting vanadium-titanium magnetite in blast furnace

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Effect test

Embodiment 1

[0022] For the furnace capacity is 2100m 3 The bell-less blast furnace has 28 tuyeres and an area of ​​0.313m2 2 . The length of the long tuyere arranged on both sides of the iron mouth in the tuyere is 480mm. The blast kinetic energy of the blast furnace is set to 450kJ / s, and the air volume is controlled to be about 5000m 3 / min, the wind speed is controlled within the range of 260m / s. The oxygen enrichment rate of the blast is controlled to be 3.0%. The blast temperature is controlled at 1200°C. The furnace temperature of the blast furnace is about 1450°C. A charging system with an open center and suppressed edge airflow is adopted to control the depth and speed of the blast furnace's material line. The batch weight of the furnace charge is controlled to be about 40t, the depth of the material line is controlled to be about 1.8m, and the material speed is controlled to be 9.5 batches / hour. The slagging and ironing time is controlled to be 80 minutes, and the effectiv...

Embodiment 2

[0024] For the furnace capacity is 1700m 3 The bell-less blast furnace has 24 tuyeres, and the tuyere area is 0.32m 2 . The length of the long tuyere arranged on both sides of the iron mouth in the tuyere is 450mm. The blast kinetic energy of the blast furnace is set to 380kJ / s, and the air volume is controlled to about 4400m 3 / min, the wind speed is controlled within the range of 270m / s. The oxygen enrichment rate of the blast is controlled to be 2.6%. The blast temperature is controlled at 1150°C. The furnace temperature of the blast furnace is about 1500°C. A charging system with an open center and suppressed edge airflow is adopted to control the depth and speed of the blast furnace's material line. The batch weight of the furnace charge is controlled to be about 36.5t, the depth of the material line is controlled to be about 1.9m, and the material speed is controlled to be 10 batches / hour. The slagging and ironing time is controlled at 90 minutes, and the effectiv...

Embodiment 3

[0026] For a furnace capacity of 1000m 3 The bell-less blast furnace has 18 tuyeres with an area of ​​0.264m2 2 . The length of the long tuyere arranged on both sides of the iron mouth in the tuyere is 450mm. The blast kinetic energy of the blast furnace is set to 260kJ / s, and the air volume is controlled to 3050m 3 / min, the wind speed is controlled within the range of 185m / s. The oxygen enrichment rate of the blast is controlled to be 2.6%. The blast temperature is controlled at 1200°C. The furnace temperature of the blast furnace is about 1480°C. A charging system with an open center and suppressed edge airflow is adopted to control the depth and speed of the blast furnace's material line. The batch weight of the furnace charge is controlled at 22t, the depth of the material line is controlled at 1.8m, and the material speed is controlled at 10.5 batches / hour. The slagging and ironing time is controlled to be 80 minutes, and the effective ironing amount of each slagg...

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Abstract

The invention provides a method for smelting vanadium-titanium magnetite in a blast furnace, which comprises the following steps of: controlling blast kinetic energy, air quantity and air speed of the blast furnace with different furnace volume in different ranges respectively, and forming an air inlet with the length of 450 to 480mm on the two sides of an iron notch of the blast furnace respectively; controlling the blast oxygen enrichment rate in the range of 2.6 to 3.0 percent; controlling the blast temperature in the range of 1,150 to 1,200 DEGC; and controlling the furnace temperature ofthe blast furnace in the range of 1,450 to 1,500 DEG C. By methods of adjusting the blast kinetic energy, blast volume and the blast temperature, controlling feeding rate, the reaction temperature ofthe blast furnace and slag basicity, and the like, the strengthened smelting of the vanadium-titanium magnetite in the blast furnace is realized, the utilization factor of the blast furnace is improved, and iron loss is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, and more specifically relates to a method for smelting vanadium-titanium magnetite with high strength in a blast furnace. Background technique [0002] Since vanadium-titanium sinter contains more TiO 2 And it has the characteristics of less binder phase, low strength, high reflow temperature, more powder, low grade, and large amount of slag during smelting, so it is special to use blast furnace to smelt vanadium-titanium magnetite. Specifically, when vanadium-titanium magnetite is smelted in a blast furnace, a reflow zone with narrow width and low position is usually formed in the furnace, which will lead to poor air permeability and high pressure difference of the material column. Due to the above reasons, the utilization coefficient of the blast furnace smelting vanadium-titanium magnetite to produce molten iron is generally low and the iron loss is high, for example, the uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 张志刚张远祥李刚赵东辉张海军曾华锋
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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