A Control Method of Shrinkage Degree of Furnace Coal with Different Moisture

A control method and technology of shrinkage, applied in coke oven, petroleum industry and other directions, can solve problems such as difficulty in pushing coke, affecting normal production, safety and longevity of coke oven, and achieve the effect of optimizing coal blending structure and smooth coking production

Active Publication Date: 2018-10-19
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 benchmark blended coal with a moisture content of 10.7%, which is defined as 1# blended coal, and then perform coking treatment on 1# blended coal, and determine its shrinkage rate S 1 Is 7.9%, applying formula S 0 =S 1 ±0.3%, it can predict the shrinkage rate S 0 The reasonable value of is between 7.6 and 8.2%;

[0032] Define the blended coal to be used for production as 2# blended coal, measure its moisture content as 10.3%, and perform coking treatment on the 2# blended coal, and determine the actual shrinkage rate S of the 2# blended coal 2 Actually 7.7%;

[0033] 2#The actual shrinkage rate of matching coal S 2 It satisfies the range of 7.6-8.2%, so the 2# blended coal can be used as production application, so the evaluation process is terminated.

Embodiment 2

[0035] Select benchmark blended coal with a moisture content of 10.5%, which is defined as 1# blended coal, and then perform coking treatment on 1# blended coal, and measure its shrinkage rate S 1 Is 7.8%, applying formula S 0 =S 1 ±0.3%, it can predict the shrinkage rate S 0 The reasonable value of is between 7.5 and 8.1%;

[0036] Define the blended coal to be used for production as 2# blended coal, determine its moisture content as 5.4%, and perform coking treatment on the 2# blended coal, and determine the actual shrinkage rate S of the 2# blended coal 2 Actually 6.1%; the actual shrinkage rate of 2# blended coal S 2 Does not meet the range of 7.5 to 8.1%, and S 2 It is less than 7.5%, so the 2# blended coal cannot be used for production applications, and the shrinkage rate of the 2# blended coal needs to be adjusted;

[0037] Adopting plan one: increase the moisture content of 2# mixed coal:

[0038] S 3 =k 1 ×M 1 +b 1 ;

[0039] S 4 =k 2 ×M 2 +b 2 ;

[0040] S 3 = 8.1%, S 4 =7.5%,...

Embodiment 3

[0046] Select benchmark blended coal with a moisture content of 10.5%, which is defined as 1# blended coal, and then perform coking treatment on 1# blended coal, and measure its shrinkage rate S 1 Is 7.8%, applying formula S 0 =S 1 ±0.3%, it can predict the shrinkage rate S 0 The reasonable value of is between 7.5 and 8.1%;

[0047] Define the blended coal to be used for production as 2# blended coal, determine its moisture content as 5.4%, and perform coking treatment on the 2# blended coal, and determine the actual shrinkage rate S of the 2# blended coal 2 Actually 6.1%; the actual shrinkage rate of 2# blended coal S 2 Does not meet the range of 7.5 to 8.1%, and S 2 It is less than 7.5%, so the 2# blended coal cannot be used for production applications, and the shrinkage rate of the 2# blended coal needs to be adjusted;

[0048] Adopting scheme 2: Estimate the upper limit and lower limit of coal moisture content:

[0049] S low =S high -(1-M low / M high )×S high , And S low =S...

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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 specifically 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 also a key influencing factor for the safety and longevity of coke ovens. In order to ensure the smooth coke pushing of coke ovens, reasonable coal shrinkage must be controlled. With the construction of domestic coal moisture control technology, Put into production, and the improvement of the preheating coking coal process at home and abroad, after the preheating of the coal entering the coke oven, the moisture can be reduced from about 11% in conventional production to 2% or even lower. The decrease in moisture reduces the shrinkage of pores due to the volatilization of moisture. The lower the moisture, the more obvious the shrinkage of the coke...

Claims

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Application Information

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Patent Type & Authority Patents(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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