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A method for smelting vanadium-titanium blast furnace by adding preheated steel scrap

A blast furnace smelting and preheating furnace technology is applied in the field of vanadium-titanium blast furnace smelting adding preheated scrap steel, which can solve the problems of poor molten iron quality, easy deterioration, and low reduction and pulverization rate in the block area, and achieves energy saving and reduction. The effect of low pulverization rate, improvement of smelting furnace condition and molten iron quality

Active Publication Date: 2022-06-24
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a vanadium-titanium blast furnace smelting method by adding preheated steel scrap, which solves the problems of easy deterioration of the titanium-containing blast furnace in all-vanadium-titanium blast furnace smelting, poor quality of molten iron, reduced powder in blocky areas low technical problems

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  • A method for smelting vanadium-titanium blast furnace by adding preheated steel scrap

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Effect test

Embodiment 1

[0060] The present embodiment provides a vanadium-titanium blast furnace smelting method for adding preheated scrap, comprising the following steps:

[0061] S0. Scrap steel treatment: The scrap steel is sheared to make its thickness 10mm.

[0062] S1. Scrap preheating: Preheat the scrap in the scrap preheating furnace.

[0063] S2, blast furnace mixed smelting: transfer the preheated scrap steel in step S1 to the blast furnace distribution area, make it cross distribution with the iron ore charge, and send it to the vanadium-titanium blast furnace for smelting.

[0064] S3. Furnace gas treatment: comprehensively treat the high-temperature waste gas obtained from the vanadium-titanium blast furnace at the initial stage and the later stage of the blowing and the high-temperature waste gas generated by the converter and / or coke oven, and the comprehensive treatment includes splitting the flow according to the CO content contained therein. , and / or split according to the tempera...

Embodiment 2

[0070] The present embodiment provides a vanadium-titanium blast furnace smelting method for adding preheated scrap, comprising the following steps:

[0071] S0. Scrap steel treatment: The scrap steel is sheared to make its thickness 30mm.

[0072] S1. Scrap preheating: Preheat the scrap in the scrap preheating furnace.

[0073] S2, blast furnace mixed smelting: transfer the preheated scrap steel in step S1 to the blast furnace distribution area, make it cross distribution with the iron ore charge, and send it to the vanadium-titanium blast furnace for smelting.

[0074] S3. Furnace gas treatment: comprehensively treat the high-temperature waste gas obtained from the vanadium-titanium blast furnace at the initial stage and the later stage of the blowing and the high-temperature waste gas generated by the converter and / or coke oven, and the comprehensive treatment includes splitting the flow according to the CO content contained therein. , and / or split according to the tempera...

Embodiment 3

[0080] The present embodiment provides a vanadium-titanium blast furnace smelting method for adding preheated scrap, comprising the following steps:

[0081] S0. Scrap steel treatment: The scrap steel is sheared to make its thickness 20mm.

[0082] S1. Scrap preheating: Preheat the scrap in the scrap preheating furnace.

[0083] S2, blast furnace mixed smelting: transfer the preheated scrap steel in step S1 to the blast furnace distribution area, make it cross distribution with the iron ore charge, and send it to the vanadium-titanium blast furnace for smelting.

[0084] S3. Furnace gas treatment: comprehensively treat the high-temperature waste gas obtained from the vanadium-titanium blast furnace at the initial stage and the later stage of the blowing and the high-temperature waste gas generated by the converter and / or coke oven, and the comprehensive treatment includes splitting the flow according to the CO content contained therein. , and / or split according to the tempera...

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Abstract

The invention relates to a method for smelting a vanadium-titanium blast furnace by adding preheated scrap steel, S1, scrap steel preheating. S2, blast furnace cloth. S3. Furnace gas treatment: the first high-temperature waste gas and the second high-temperature waste gas are obtained by comprehensively treating the high-temperature waste gas obtained in the early stage and late stage of blowing of the vanadium-titanium blast furnace and the high-temperature waste gas generated by the converter and / or coke oven. S31. After being enriched in the gasification furnace, the first high-temperature waste gas is passed into the scrap steel preheating furnace in step S1 to burn and release heat for preheating the scrap steel. S32. The second high-temperature exhaust gas is sprayed back into the vanadium-titanium blast furnace for smelting iron-containing ore charge. The invention reduces TiO in all-vanadium titanium ore by preheating scrap steel instead of high-cost iron concentrate 2 Content, reduce raw material cost, improve smelting furnace conditions and molten iron quality, save energy consumption, improve production efficiency, and meet the requirements of blast furnace production. The high-temperature waste gas generated by its production is enriched as preheated scrap raw material and recycled Spray to the blast furnace for use as reducing gas.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of iron and steel metallurgical resources, in particular to a vanadium-titanium blast furnace smelting method adding preheated scrap steel. Background technique [0002] During the smelting process of all-vanadium-titanium ore, the TiO 2 If the content exceeds 20%, the slag viscosity, foamy slag, high iron loss, molten iron sticking to the pot, etc. are caused, which seriously restricts the production of all-vanadium-titanium blast furnaces. At present, the main method to solve the problem of all-vanadium-titanium blast furnace smelting is to add high-grade iron powder or chromite to reduce the content of titanium dioxide in the vanadium-titanium ore. But the cost of iron concentrate is high. [0003] In the blast furnace production process, the use of scrap steel to blast furnace production can increase the production of molten iron. For vanadium-titanium blast furnaces, scrap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00C21B5/06
CPCC21B5/008C21B5/06C21B2100/80
Inventor 薛向欣宋翰林张金鹏刘建兴程功金杨合高子先黄壮
Owner NORTHEASTERN UNIV LIAONING