Method for sorting coking coal with 32-37% volatile component and coking blending method

A technology of coking coal and coking coal, which is applied in the field of coal quality classification of coking coal, which can solve the problems of low degree of deterioration of coking coal, poor performance, and large difference in coal quality, so as to achieve the reduction of blast furnace coke ratio, optimal allocation, Effect of improving coke quality

Active Publication Date: 2012-09-19
武汉钢铁有限公司
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Problems solved by technology

This kind of 1 / 3 coking coal has a large difference in coal quality due to the different properties of colloids. In coal blending and coking, some coking coals classified as 1 / 3 coking coal cannot be used or cannot be used well for this type of coal. the role of
In addition, this kind of 1 / 3 coking coal has a low degree of metamorphism, and the proportion of use is generally low

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  • Method for sorting coking coal with 32-37% volatile component and coking blending method

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[0029]

[0030] The coking coal blending method of the present invention is: to dry ash-free base volatile matter V daf ≥32.0-37.0%, coking index G value>65, colloidal layer maximum thickness Y value≤25.0mm, test the colloidal layer index, and observe the characteristics of the colloidal layer index:

[0031] If the characteristic curve of the gelatinous layer is a smooth descending type, it is used with gas and coal;

[0032] If the characteristic curve of the gelatinous layer is wave type or "Z" type, use 1 / 3 coking coal;

[0033] If the characteristic curve of the gelatinous layer is a "mountain" type, further carry out the measurement of the Kiel's fluidity to determine its maximum fluidity MF and the determination of the Aurora swelling degree b, if the maximum fluidity MF≥60000ddpm and the Aurya expansion degree b≥220% , with fat coal; if the maximum fluidity MF<60000ddpm or Aoya expansion b<220%, use with 1 / 3 coking coal;

[0034] Furthermore, if the characteristic...

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Abstract

The invention discloses a method for sorting coking coal with 32-37% volatile component and a coking blending method. A dried ash-less volatile component Vdaf of the coking coal is greater than or equal to 32.0-37.0%, a caking index G value is 65, and a maximum thickness Y value of a gelatinous layer is smaller than or equal to 25.0mm. According to the method, the coking coal is respectively divided into gas coal, 1 / 3 coking coal and gas-fat coal according to three indexes including a gelatinous layer characteristic curve, a maximum fluidity and an Arnu-Audibert's dilatometer, so that the coking blending method for the coking coal is determined. According to the method which is used for blending and coking, the quality of the coke is stably improved, the fluctuation range of CSR (China standard rubber) is reduced remarkably, and the coke ratio of a blast furnace is reduced under a condition that coal moisture control and coal briquette technologies and a pre-grinding process are not adopted. And the CSR of coke smelted by 6m above coke ovens is 63%.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coal quality classification method of coking coal and a coking coal blending method. Background technique [0002] 1 / 3 coking coal is a moderately high volatile coking coal with strong caking properties, and it is a transitional coal between coking coal, fat coal and gas coal. In coal blending and coking, it has a certain fluidity and expansibility, which can fine-tune the rheology and expansibility of the blended coal, and at the same time provide a certain granular structure to support the thermal properties of coke. [0003] According to China coal classification standard (GB 5751-2009), dry ash-free basis volatile V daf ≥32.0-37.0%, coking index G value> 65, colloidal layer maximum thickness Y value ≤ 25.0mm is classified as 1 / 3 coking coal. This kind of 1 / 3 coking coal has a large difference in coal quality due to the different properties of c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/04
Inventor 项茹张雪红薛改凤陈鹏盛军波刘向勇鲍俊芳詹立志宋子逵任玉明
Owner 武汉钢铁有限公司
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