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Coal blending method for blast furnace injection coal and blast furnace injection coal

A blast furnace coal injection and coal blending technology, which is applied to the coal blending and blast furnace coal injection fields, can solve the problem of low coal blending ratio, and achieve the effects of increasing the coal blending ratio, expanding the dosage and reducing the explosiveness.

Active Publication Date: 2017-01-04
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Based on this, it is necessary to provide a coal blending method for blast furnace PCI coal and a blast furnace PCI coal blending method for the low-rank coal in the prior art.

Method used

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  • Coal blending method for blast furnace injection coal and blast furnace injection coal
  • Coal blending method for blast furnace injection coal and blast furnace injection coal
  • Coal blending method for blast furnace injection coal and blast furnace injection coal

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] A coal blending method for blast furnace injection coal, comprising:

[0020] Grinding the low-rank coal to obtain low-rank coal powder, wherein the weight percentage of the low-rank coal powder in the low-rank coal powder is 38.05% to 93.74%;

[0021] The pulverized coal of the blast furnace is obtained by mixing the pulverized low-rank coal with other pulverized coal.

[0022] In the existing coal blending method of blast furnace injection coal, due to the high volatile content and strong explosiveness of low-rank coal, in the existing coal blending method of blast furnace injection coal blending, low-rank coal is used as blast furnace injection coal blending method. The weight ratio is up to about 30%.

[0023] The present invention relaxes the particle size of low-rank coal in the pulverizing process, increases the conten...

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Abstract

The invention discloses a coal blending method of blast-furnace-injected pulverized coal and the blast-furnace-injected pulverized coal. The coal blending method comprises the following steps: grinding low-rank coal into the coal powder of the low-rank coal, wherein the coal powder of which the particle size is smaller or equal to 100-mesh bore diameter accounts for 38.05-93.74% of the total weight of the coal powder of the low-rank coal; then mixing the coal powder of the low-rank coal with coal powder of the other coals to obtain the blast-furnace-injected pulverized coal. According to the coal blending method of the blast-furnace-injected pulverized coal, the particle size of the low-rank coal is broadened in the powdering process so as to increase the content of the coal powder whose particle size is smaller or equal to 100-mesh bore diameter in the low-rank coal, so that the explosiveness of the coal powder is reduced and the safety requirements of the blast furnace coal injection are met; thus, the ratio of the low-rank coal in coal blending is increased. Moreover, the dosage of the low-rank coal in the blast-furnace-injected pulverized coal is enlarged, so that the production costs of the iron and steel enterprises are greatly decreased and the economic benefits of the enterprises are increased.

Description

technical field [0001] The invention relates to the related technical field of coal blending, in particular to a coal blending method of blast furnace injection coal and the blast furnace injection coal. Background technique [0002] Blast furnace fuel injection is a new technology widely used in modern blast furnace ironmaking production, and it is one of the indispensable and important means for modern blast furnace condition adjustment. Fuel injection in blast furnace is beneficial to reduce coke ratio, reduce pig iron cost, improve blast furnace smelting process, and further improve various technical and economic indicators of blast furnace. [0003] Blast furnace injection has certain requirements on the quality of coal. Coal should have low ash and sulfur content, high calorific value, good grindability, combustibility, and transportation performance, low explosiveness, and good reactivity. For a long time, my country's blast furnace coal injection generally uses ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 王元臣白向飞谷红伟严巍陈洪博李晓伟王子乾王鹤刘昊钰
Owner CHINA SHENHUA ENERGY CO LTD
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