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Blast furnace coal spraying tube, and method for reducing coke rate of blast furnace

A technology of blast furnace coal injection and blast furnace, which is applied in the fields of blast furnace coal injection pipe and reduction of blast furnace coke ratio, and can solve problems such as increasing blast furnace coke ratio, reducing ironmaking cost, and heat consumption

Inactive Publication Date: 2014-02-19
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, there are the following problems: Although the pulverized coal is dried and preheated before the pulverized coal is injected, usually the coal injection workshop is a long distance from the blast furnace, and the pulverized coal is transported through pipelines When it reaches the blast furnace, the heat it carries has been exhausted
In this way, the coke ratio of the blast furnace will be increased, which is not conducive to reducing the cost of ironmaking

Method used

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  • Blast furnace coal spraying tube, and method for reducing coke rate of blast furnace

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Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0027] refer to figure 1 , On the one hand, the present invention provides a blast furnace coal injection pipe. The blast furnace coal injection pipe includes an injection part 1 and a heating part 2 . Wherein, the injection part 1 is connected with the lance of the blast furnace coal injection pipe, that is, the injection part 1 is the tubular part of the blast furnace coal injection pipe closest to the blast furnace. When the blast furnace coal injection pipe is working, coal powder enters the spray gun from the injection part 1, and then sprays into the furnace cavity of the blast furnace through the spray gun. According to an embodiment of the present inv...

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Abstract

The invention discloses a blast furnace coal spraying tube. The blast furnace coal spraying tube comprises a blowing portion (1) connected with a spraying gun of the blast furnace coal spraying tube, and a heating portion (2) sleeved outside the blowing portion, wherein a thermal medium providing heat for coal dust in the blowing portion is accommodated between the heating portion and the blowing portion. The invention also discloses a method for reducing the coke rate of a blast furnace. The method comprises a step that the coal dust in the blast furnace coal spraying tube is preheated in a position of the blast furnace coal spraying tube adjacent to a coal dust inlet of the blast furnace. The preheated coal dust is blown into the blast furnace at a temperature close to the ignition point, and can be directly ignited without absorbing the combustion heat of coke in the blast furnace, so the effectiveness of the combustion heat of the coke is effectively improved, thereby the coke rate of the blast furnace is reduced.

Description

technical field [0001] The invention relates to metallurgy, in particular to a blast furnace coal injection pipe and a method for reducing the coke ratio of the blast furnace. Background technique [0002] With the dwindling of ore resources and fuel resources, the cost of ironmaking is rising. The cost of ironmaking can be reduced by reducing the coke ratio of the blast furnace, and one of the commonly used methods to reduce the coke ratio is to inject pulverized coal. On the one hand, the shortage of coking coal resources can be alleviated by injecting pulverized coal into the blast furnace by using the blast furnace coal injection pipe; on the other hand, due to the absolute price advantage of pulverized coal compared with coke, it becomes a favorable way to reduce the cost of pig iron. [0003] Blast furnace pulverized coal injection is a process in which the ultra-fine coal powder prepared by the pulverized coal preparation system is injected into the blast furnace thr...

Claims

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Application Information

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IPC IPC(8): C21B7/16C21B5/00
Inventor 胡鹏付卫国谢洪恩
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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