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Controlling method for shrinkage degree of coal-as-fired with different moisture

A control method and shrinkage technology, applied in the coking oven, petroleum industry, etc., can solve the problems that affect the normal production, safety and longevity of the coke oven, and the difficulty of coke pushing, and achieve the effect of smooth coking production and optimized coal blending structure

Active Publication Date: 2016-07-20
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If adjustment measures are not taken, it will cause difficulties in coke pushing, which will seriously affect the normal production, safety and longevity of coke ovens
[0003] Once the coke oven is completed and put into operation, its various parameters have little influence on the adjustment of the shrinkage of the coke cake, and the coal blending structure of the incoming coal is greatly adjusted, and the shrinkage changes significantly, but how to determine the coal blend that can ensure smooth coke pushing The solution becomes a technical problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Select the reference blend coal, the water content is 10.7%, which is defined as 1# blend coal, and then carry out coking treatment on 1# blend coal, and measure its shrinkage rate S 1 is 7.9%, applying the formula s 0 = S 1 ±0.3%, it is possible to predict the shrinkage rate S of the blending coal to be used in production 0 The reasonable value of is between 7.6 and 8.2%;

[0032] Define the blending coal to be used in production as 2# blending coal, measure its moisture to 10.3%, and carry out coking treatment on 2# blending coal, and measure the actual shrinkage rate S of 2# blending coal2 Actual 7.7%;

[0033] Actual shrinkage rate S of 2# blend coal 2 Satisfy the range of 7.6-8.2%, so the 2# blending coal can be used as production application, so the evaluation process is terminated.

Embodiment 2

[0035] Select the reference blend coal with a water content of 10.5%, which is defined as 1# blend coal, and then carry out coking treatment on 1# blend coal, and measure its shrinkage S 1 is 7.8%, applying the formula s 0 = S 1 ±0.3%, it is possible to predict the shrinkage rate S of the blending coal to be used in production 0 The reasonable value of is between 7.5 and 8.1%;

[0036] Define the blending coal to be used in production as 2# blending coal, measure its moisture content to 5.4%, and carry out coking treatment on 2# blending coal, and measure the actual shrinkage rate S of 2# blending coal 2 Actual 6.1%; the actual shrinkage rate S of 2# blending coal 2 Does not meet the range of 7.5-8.1%, and S 2 Less than 7.5%, so the 2# blending coal can not be used as production application, the shrinkage rate of 2# blending coal needs to be adjusted;

[0037] Adopt scheme 1: increase the moisture content of 2# mixed coal:

[0038] S 3 =k 1 × M 1 +b 1 ;

[0039] S ...

Embodiment 3

[0046] Select the reference blend coal with a water content of 10.5%, which is defined as 1# blend coal, and then carry out coking treatment on 1# blend coal, and measure its shrinkage S 1 is 7.8%, applying the formula s 0 = S 1 ±0.3%, it is possible to predict the shrinkage rate S of the blending coal to be used in production 0 The reasonable value of is between 7.5 and 8.1%;

[0047] Define the blending coal to be used in production as 2# blending coal, measure its moisture content to 5.4%, and carry out coking treatment on 2# blending coal, and measure the actual shrinkage rate S of 2# blending coal 2 Actual 6.1%; the actual shrinkage rate S of 2# blending coal 2 Does not meet the range of 7.5-8.1%, and S 2 Less than 7.5%, so the 2# blending coal can not be used as production application, the shrinkage rate of 2# blending coal needs to be adjusted;

[0048] Adopt scheme two: estimate the upper limit and lower limit of coal moisture in the furnace:

[0049] S 低 = S 高...

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Abstract

The invention discloses a control method for shrinkage degree of coal-as-fired with different moisture, and belongs to the technical field of coal blending and coking in metallurgy. The control method includes 1), selecting standard matched coal; 2) selecting production application matched coal; 3), coking the matched coal 2#; 4), evaluating the shrinkage degree, ending the evaluating process if the matched coal 2# meets production application requirements, and adjusting moisture of the matched coal 2# or increasing proportioning of coking coal with the shrinkage degree, in which X is larger than 35mm and b is smaller than or equal to 0%, if the matched coal 2# does not meet the production application requirements. The control method has the advantages that coking energy consumption can be minimized by controlling the moisture of the coal-as-fired on the basis of successful coke cake pushing, coal blending structure can be optimized, coal cake shrinkage is guaranteed without changing the moisture of the matched coal, and smooth coking production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical coal blending and coking, and in particular relates to a method for controlling the shrinkage of coal with different moisture content. Background technique [0002] Smooth coke pushing is an important condition for the normal production of coke ovens, and it is also a key factor affecting the safety and longevity of coke ovens. In order to ensure the smooth coke pushing of coke ovens, it is necessary to control the reasonable shrinkage of coal into the furnace. With the construction of domestic coal humidity control technology, Putting into production, and the improvement of preheating coking coal process at home and abroad, after the coke oven coal is preheated, the moisture content can be reduced from about 11% in conventional production to 2%, or even lower. The reduction of moisture reduces the shrinkage of pores due to moisture volatilization. The lower the moisture is, the more obvious...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/04
CPCC10B57/04
Inventor 张雪红陈鹏方红明詹立志薛改凤项茹鲍俊芳宋子逵任玉明王元生陈细涛
Owner 武汉钢铁有限公司
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