A Coking Coal Blending Method with Medium and High Sulfur Coal Participation

A coking coal and fat coal technology, applied in the field of metallurgical coke production, can solve the problems of not being able to meet the coke quality requirements of large blast furnaces, unable to ensure the continuous reflectance of vitrinite and coke quality decline, and achieve the protection of high-quality coking Coal resources, coke quality is good, and the effect of reducing coking cost

CN105713633BActive Publication Date: 2019-04-26ANGANG STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-04-26
Patent Text Reader

Abstract

The invention provides a method for blending coking coal by using fat coal with medium and high sulfur content. The coking coal comprises the following components in percentages by weight: 8%-18% of 1 / 3 coking coal, 10%-20% of fat coal with medium and high sulfur content, 8%-29% of fat coal, 16%-35% of coking coal with coking index G greater than or equal to 78, 19%-36% of coking coal with coking index G greater than or equal to 75 and smaller than 78, and 8%-22% of lean coal. G value of the coking index of the coking coal is 80-85, Y value is 15-19 mm, and Std is 0.65%-1.15%. The coal properties of the fat coal with medium and high sulfur content are as follows: the mean maximum reflectance of vitrinite is 0.90%-1.10%, and volatiles are 26%-32%. Technological performance indexes are as follows: the G value of the coking index is greater than or equal to 86, the Y value of the thickness of a gel layer is greater than or equal to 20 mm, and Std is 1%-3%. The content of produced coke sulfur is below 1.0%, and reaches the level higher than the level of third-level coke, demands of coke using of a large blast furnace can be met completely, the purposes of fully utilizing the coal with medium and high sulfur and protecting high-quality coking coal resources are achieved, and coking cost can be reduced greatly.
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Description

technical field

[0001] The invention belongs to the technical field of metallurgical coke production, and in particular relates to a coking coal-rock coal blending method using medium- and high-sulfur fertile coal. Background technique

[0002] With the increasing application proportion of large-scale blast furnaces, the demand for high-quality coke is also increasing. Therefore, it is required to mix a large amount of moderately metamorphic fat coal and coking coal in coal blending. According to the classification of coal types in my country, coking coal accounts for 27.65%, and non-coking coal accounts for 72.35%. Among coking coals, gas coal: 13.75%, fat coal: 3.53%, main coking coal: 5.81%, lean coal: 4.01%, and other unclassified coal: 0.55%. It can be seen that fat coal is the coal with the least reserves in coking coal in my country, and in the actual coking coal blending process, fat coal and coking coal are mainly used. Therefore, effective utilization of fat coal...

Examples

Embodiment 1

[0023] (1) The components and weight percentages of coking coal are:

[0024] 1 / 3 coking coal: 14%; medium and high sulfur fat coal: 12%; other fat coal: 15%; caking index G≥78 coking coal 1 # : 10%; caking index G≥78 coking coal 2 # : 8%; caking index 75≤G<78 coking coal: 30%; lean coal: 11%.

[0025] (2) Coal quality indicators of medium and high-sulfur rich coal: average maximum reflectance of vitrinite: 1.195%; volatile matter: 28.44%; process performance indicators: cohesion index G value 92.2, colloidal layer thickness Y value 25.4mm , S td : 2.33%.

[0026] (3) Coal quality index of coking coal: caking index G value: 81.2; colloid layer thickness Y value: 15.5mm; S td : 1.03%.

[0027] (4) The quality of coke made in a coke oven above 6 meters: coke crushing strength M 40 : 88.73%; coke strength CSR after reaction: 62.00%; coke S td : 0.78%.