The Method of Establishing the Coal Quality Comparative Evaluation Model among Different Coking Coals

Abstract

The invention discloses a method for establishing a coal quality comparison and evaluation model among different coking coal types. The method comprises the following steps: 1) determining the sample coal participating in the coal blending test, detecting the key performance indicators of the sample coal, and obtaining the blended coal 2) Establish the correlation equation between the key performance indicators of sample coal and / or blending coal and the thermal performance CSR of coke, and obtain the relevant constant items in the equation; 3) According to the contribution of different coking coal types to the thermal performance of coke To establish a comparative evaluation model for coal quality of different coking coal types; 4) Correction of ash and sulfur indexes. The coal quality comparison evaluation model established by the present invention evaluates the quality of the contribution degree of coke thermal properties of different coal types, effectively solves the apparent limitations of the national standard on coal quality evaluation, and is useful for avoiding the purchase of high-priced low-coking coal types and the selection of Coal blending with appropriate coal types has good guiding significance to ensure the quality of coke and reduce the cost of coal blending.

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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