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Coal blending method of high metamorphic coking coal participating in coking

A technology for highly metamorphic and coking coal, applied in coke ovens, petroleum industry and other directions, can solve the problems of increasing production costs and waste of resources, and achieve the effect of improving coke strength and efficient coal blending

Active Publication Date: 2016-09-14
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen that when high-metamorphic coking coal participates in coal blending coking, if one-sided emphasis is placed on the Y value of the blending coal to reach 15 mm or more, and the maximum fluidity of the Gibsonian to 300 ddpm or more, it is bound to excessively consume high-quality coking coal with abundant colloids and good fluidity resources, causing waste of resources and increasing production costs of enterprises

Method used

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  • Coal blending method of high metamorphic coking coal participating in coking
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  • Coal blending method of high metamorphic coking coal participating in coking

Examples

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Embodiment 1

[0029] In Example 1-1, although the proportions of various coal types meet the range requirements, the ratio of the vitrinite reflectance ≤ 0.70% in the blended coal and the sum of the inertinite content are higher than the specified requirements, and the coke thermal strength CSR Less than 65%. Because the ratio of vitrinite reflectance ≤ 0.70% and the content of inertinite in gas coal mine C are the highest, the proportion is reduced from 30% to 25%, and the proportion of mine A is increased by 5%, see Example 1 , the proportion of vitrinite reflectance ≤ 0.70% in blending coal decreased from 31.51% to less than 30%, and the sum of inertinite content in blending coal decreased from 35.29% to less than 35%, and the adjustment of coal blending plan was completed. Coke thermal strength CSR increased from 63.17% to 67.06%.

Embodiment 4

[0030]In Example 4-1, although the proportions of various coal types meet the range requirements, the proportion of vitrinite reflectance in the range of 1.35% to 1.50% in the blended coal is lower than the specified requirements, and the coke thermal strength CSR is less than 65%. Because the proportion of vitrinite reflectance in mine B is relatively high in the range of 1.35% to 1.50%, its proportion is increased from 15% to 20%, and the proportion of mine D is correspondingly reduced by 5%. See Example 4, blending coal The proportion of vitrinite reflectance in the range of 1.35% to 1.50% increased from 14.25% to 16.65%, the adjustment of coal blending scheme was completed, and the CSR of coke thermal strength increased from 64.38% to 66.21%.

[0031] Table 2 Coal blending schemes of Examples 1-4, 1-1, 4-1

[0032]

[0033]

[0034] Under the traditional pre-mixing and then pulverization process, no pre-crushing and selective crushing, no coal humidity adjustment, no...

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Abstract

The invention discloses a coal blending method of high-metamorphic coking coal for coking. The method comprises the following steps: 1) measuring the average maximum reflection rate of vitrinites of the high-metamorphic coking coal and other single coking coal, counting the ratios of the areas as shown in the specification, measuring the maceral of single coal rack, and counting the content of inertinite; 2) confirming the coal blending ratio of single coal, and ensuring that the percentages of the average maximum reflection rate areas of the five vitrinites of the complex coal are sequentially 10-30%, 10-30%, 20-40%, 15-25% and 2-20%, and the content of inertinite of the maceral of the coal rack is 25-35%. According to the coal blending method, the above indexes of the complex coal are selected to blend coal, high-quality coked carbon can be still smelted even if the Y value and the Golgi maximum flow degree of the complex coal are less than a relatively level, and thus the high-quality coal resource with good flowability can be saved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coking, and in particular relates to a coal blending method in which high metamorphic coking coal participates in coking. Background technique [0002] Volatile content V of coking coal commonly used in coking coal daf Between 18% and 28%, the average maximum reflectance of vitrinite Between 1.15% and 1.50%. in The coking coal with a concentration between 1.35% and 1.50% is called high metamorphic coking coal. The cohesion index G value of this kind of high metamorphic coking coal is generally between 75 and 90, and the colloidal layer index Y value is generally between 14 and 20mm. The temperature range is generally between 50-75°C, the maximum Gibbs fluidity is between 10-500ddpm, the expansion degree b is between 10%-50%, and the coarse-grain mosaic component content is between 38%-78%. According to the traditional coal blending method, the Y value of the blended coal needs to be a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04
CPCC10B57/04
Inventor 鲍俊芳宋子逵薛改凤盛军波陈胜春崔会明陈翔贾丽晖詹立志张雪红陈细涛陈鹏项茹王元生任玉明冯柏华谢传斌万基才
Owner 武汉钢铁有限公司