A method for establishing a coal quality comparison evaluation model between different coking coal types

Abstract

The invention discloses a method for establishing a coal quality comparison evaluation model between different coking coal types, which comprises the following steps: 1) determining sample coal participating in a coal blending test, and detecting the key performance index of the sample coal to obtain the key performance index of blended coal; 2) establishing a correlation equation of the key performance indexes of the sample coal and / or the blended coal and the coke thermal performance CSR, and solving a correlation constant item in the equation; 3) establishing a coal quality comparison evaluation model of different coking coal types according to the difference of contribution degrees of the different coking coal types to the coke thermal performance; and 4) correcting ash content and sulfur content indexes. The established coal quality comparison and evaluation model evaluates the quality according to contribution degrees of different coal types to the coke thermal performance; the apparent limitation of the national standard on coal quality evaluation is effectively solved, and the method has good guiding significance in avoiding purchasing high-price and low-coking coal types and selecting proper coal types for coal blending so as to ensure the coke quality and reduce the coal blending cost.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a method for establishing a coal quality comparison and evaluation model among different coking coal types. Background technique [0002] There is a shortage of coking coal resources in my country, and the resources of strong caking coking coal are even more scarce. The coal quality evaluation and use of coking coal in my country are basically implemented in accordance with national standards. In order to meet the coke needs of large-scale blast furnaces, domestic steel mills use a large amount of strong caking coal, resulting in high price of strong caking coal. In addition, for the same type of coal, each enterprise usually chooses coal with high caking index and low volatile content, and prefers coking coal and fat coal in the selection and evaluation of coal types. The coking property of coal is inferior to 1 / 3 of coking coal; while the same is fat c...

AI Technical Summary

Problems solved by technology

The disadvantage is that this method does not link coal quality with price, and the guidance on procurement is still at a relatively abstract and macro level. The price of some high-quality coking coal is too high, and the cost of coal blending is also relatively high

Domestic companies such as Laiwu Iron and Steel, Handan Iron and Steel, and Shanxi Coking Chemical have assigned a certain proportion to the conventional indicators of coking coal, further deducted deductions, and carried out procurement and allocation, which has achieved certain positive effects. However, conventional indicators are prone to segregation in the evaluation of coal quality , the evaluation model is also prone to deviation

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