A Coal Blending Method for Start-up of 7.5m Coke Oven

A technology for coke oven and coal blending, which is applied in the field of coal blending of 7.5m coke ovens, can solve problems such as furnace wall damage, and achieve the effect of avoiding excessive expansion pressure and satisfying coke quality.

Active Publication Date: 2022-04-22
LIUZHOU IRON & STEEL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to ensure reasonable expansion of the furnace wall and avoid damage to the furnace wall caused by excessive expansion pressure

Method used

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  • A Coal Blending Method for Start-up of 7.5m Coke Oven
  • A Coal Blending Method for Start-up of 7.5m Coke Oven

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Experimental program
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Embodiment

[0042] (1) According to the statistics of coal quality data with good coking performance and stable coke pushing current in the 6-meter coke oven in the past six months, the fluctuation range of X value is between 28 and 36mm, and the range of maximum fluidity is between 50 and 1100dd / min The fluctuation range of b value is between 10% and 36%.

[0043] (2) Calculation of shrinkage, expansion and maximum fluidity of 7.5m coke oven blend coal:

[0044] ①The lower limit value of X value of 7.5m coke oven blend coal is: X 7.5 =X 6 *(1+25%)=28*(1+25%)=35mm; the upper limit of X value is: X 7.5 =X 6 *(1+25%)=36*(1+25%)=45mm.

[0045] ② The lower limit of the b value of 7.5m coke oven blend coal is: b 7.5 =b 6 *(1+25.33%)=10*(1+25.33%)=12.5%; the upper limit of b value is: b 7.5 =b 6 *(1+25.33%)=36*(1+25.33%)=45.1%.

[0046] ③The length of the 7.5m coke oven is longer than that of the 6m coke oven (18880-15980) / 15980=18.15%, then the lower limit of the maximum fluidity of c...

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Abstract

The invention discloses a coal blending method for starting a 7.5m coke oven. The coal blending method comprises the following steps: measuring the blending coal index data of a 6m coke oven. The blending coal index data includes: the maximum shrinkage of the blending coal X , the maximum fluidity and the Aurora expansion b, according to the coal index data of the 6-meter coke oven, the maximum shrinkage range, the maximum fluidity range, and the Aura expansion range of the 7.5m coke oven blend coal are drawn up; judge the preset Whether the maximum shrinkage, maximum fluidity and Aoya swelling degree of the 7.5m coke oven blending coal meet the proposed 7.5m coke oven blending coal maximum shrinkage range, maximum fluidity range and Auya swelling degree range; If it meets the range, end the coal blending. If not all within the range, reset the blending coal index data of the 7.5m coke oven. Ensure the safety of the coke oven body after it is put into production, the coke can be pushed out smoothly, and the coke quality can be obtained satisfactorily.

Description

technical field [0001] The invention relates to the technical field of coking coal blending, in particular to a coal blending method for starting a 7.5m coke oven. Background technique [0002] The 7.5m coke oven is a new type of coke oven built for the first time in the world. Compared with domestic extra-large coke ovens of 7.63 meters and 7.29 meters, the height and width of the carbonization chamber are different. The effective height of the carbonization chamber is higher than that of 7.29 meters, but the effective length is shorter than that of 7.29 meters. The increase of the heating height will have a significant impact on the maturation of the coke cake in the carbonization chamber. This type of coke oven is the first in China as well as in the world, and there is no research on the coal blending start-up scheme of 7.5m coke oven at home and abroad. New methods are needed to ensure reasonable expansion of the furnace wall and avoid damage to the furnace wall. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/00
CPCC10B57/00
Inventor 陈静春游坚陈意蓝伟润杨中贵李文章张俊唐炜
Owner LIUZHOU IRON & STEEL
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