Blow-in method for blast furnace to smelt high-titanium type vanadium titano-magnetite

A vanadium-titanium magnetite and blast furnace smelting technology, which is applied to blast furnaces, blast furnace details, furnace types, etc., can solve the problems of restricting blast furnace production and efficiency progress, slow material conversion speed, high consumption, etc., and improve economic and technical indicators , fast effect and high success rate

Inactive Publication Date: 2012-02-01
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The blast furnace smelting high-titanium vanadium-titanium magnetite technology in the prior art has shortcomings such as large amount of slag, low output, high consumption, low success rate of material system conversion and slow speed of material system conversion, etc., so it affects The economic and technical indicators of the production after the furnace is opened restrict the progress of the blast furnace to reach the production and efficiency, which has a great adverse impact on the iron and steel enterprises

Method used

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  • Blow-in method for blast furnace to smelt high-titanium type vanadium titano-magnetite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The furnace opening method of the present invention is used in a blast furnace for smelting high-titanium vanadium-titanium magnetite. The blast furnace capacity is 1200m 3 .

[0038] Iron-bearing lump ore is high-titanium vanadium-titanium magnetite lump ore, of which all iron (T Fe ) content is 44wt%, silicon dioxide (SiO 2 ) content can be 18wt%, and the particle size is in the range of 25-75mm. The particle size of the limestone is between 25mm and 75mm, and the effective calcium oxide (CaO) content is greater than 51wt%.

[0039] For the selection of tuyere area, except for the 4 tuyeres where furnace bottom ignition blowpipes are installed, φ90mm tuyere refractory ferrules are installed on the rest, and the air inlet area is 69.22% of the normal blast area. First, the hearth and the middle and lower parts of the bosh are filled with coke, the upper part of the bosh and the waist are filled with empty material, and then when the empty material and normal materi...

Embodiment 2

[0041] The furnace opening method of the present invention is used in a blast furnace for smelting high-titanium vanadium-titanium magnetite. The blast furnace capacity is 2000m 3 .

[0042] The lump ore is a high-titanium vanadium-titanium magnetite lump ore, of which all-iron (T Fe ) content is 44wt%, silicon dioxide (SiO 2 ) content can be 18wt%, and the particle size is in the range of 25-75mm. The particle size of the limestone is between 25mm and 75mm, and the effective calcium oxide (CaO) content is greater than 51wt%.

[0043] For the selection of tuyere area, except for the 4 tuyeres where furnace bottom ignition blowpipes are installed, φ90mm tuyere refractory ferrules are all installed, and the air inlet area is 68.72% of the normal blast area. Firstly, the hearth and the middle and lower parts of the bosh are filled with coke, the upper part of the bosh and the furnace waist are filled with empty material, and when the empty material and normal material are loa...

Embodiment 3

[0045] The furnace opening method of the present invention is used in a blast furnace for smelting high-titanium vanadium-titanium magnetite. The blast furnace capacity is 1280m 3 .

[0046] The lump ore is a high-titanium vanadium-titanium magnetite lump ore, of which all-iron (T Fe ) content is 46wt%, silicon dioxide (SiO 2 ) content can be 20wt%, and the particle size is in the range of 25-75mm. The particle size of the limestone is between 25mm and 75mm, and the effective calcium oxide (CaO) content is greater than 55wt%.

[0047] For the selection of tuyere area, except for the 4 tuyeres where furnace bottom ignition blowpipes are installed, φ90mm tuyere refractory ferrules are installed on the rest, and the air inlet area is 67.8% of the normal blast area. Firstly, the hearth and the middle and lower parts of the bosh are filled with coke, the upper part of the bosh and the furnace waist are filled with empty material, and when the empty material and normal material ...

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Abstract

The invention provides a blow-in method for a blast furnace to smelt high-titanium type vanadium titano-magnetite, which comprises the steps of material loading, blast smelting, slag-out and tapping iron, wherein the material loading step comprises the process that before ignition smelting, hard coke is used for filling a hearth and the middle part and the lower part of a furnace bosh, hollow materials are filled at the upper part of the furnace bosh and a furnace waist, the hollow materials and normal materials are alternately filled into a furnace shaft, the hollow materials comprise the hard coke and lime stone but do not comprise iron-containing furnace materials, the normal materials comprise the hard coke, iron-containing lump ore and lime stone, and the normal materials are added into the blast furnace after the ignition smelting; in the blast smelting step, the air inlet area is reduced to 60 percent to 70 percent of the ordinary air inlet area: and the blow-in method also comprises a conversion material preparation step, and in the conversion material preparation step, high-titanium type vanadium-titanium magnet sinter is used for replacing the iron-containing lump ore in 1.5 to 2.0 smelting periods. The method can realize the effects of stable operation, high success ratio, high yield-reaching and efficiency-reaching speed, economic and technical index improvement of ironmaking production after blow-in and the like.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, and more specifically relates to a rapid furnace-starting method for smelting high-titanium vanadium-titanium magnetite in a blast furnace. Background technique [0002] Blast furnace start-up is a production organization process with many influencing factors and complex technology. Whether the start-up is smooth or not and the speed of reaching production capacity are related to the life of the first-generation blast furnace and equipment safety, as well as the investment benefits and economics of the enterprise. benefit. It is the goal pursued by every ironworks to achieve rapid start-up and reach production and efficiency as soon as possible, and it is also a comprehensive reflection of the technical level and organizational management level of an ironworks. [0003] Vanadium-titanium-magnetite blast furnace smelting has all the common features of ordinary ore blast furnace s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 李刚杜斯宏宋剑雷电曾华峰张远祥
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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