Coal quality evaluating and distributing method for highly metamorphic coking coal

Abstract

The invention discloses a coal quality evaluating and distributing method for highly metamorphic coking coal. According to the evaluation method, the reflectivity of the highly metamorphic coking coal ranges from 1.35% to 1.50%, and the content of inertinite in macerals of coal and rocks is different, so that the highly metamorphic coking coal is evaluated as high-quality coking coal, general coking coal and low-quality coking coal. According to different coal qualities of the highly metamorphic coking coal, different distribution methods are provided. When the coal is distributed according to the evaluation method provided by the invention, the distribution amount of gas coal is increased or decreased correspondingly according to the difference coal qualities of the highly metamorphic coking coal, so that both the coal distribution cost and the coking coal quality are effectively considered.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coking, and in particular relates to a coal quality evaluation and matching method of high metamorphic coking coal. 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 of 1.35-1.50% is called high-metamorphic coking coal. The cohesive index G value of this type of high-metamorphic coking coal is generally between 75-90, the colloidal layer index Y value is generally between 14-20mm, and the solid-soft temperature The range is generally between 50-75°C, the maximum Gibbs fluidity is between 10-500ddpm, and the content of coarse-grained mosaic components is between 38-78%. According to the traditional coal quality evaluation method, the higher the cohesion index G value, colloid layer index Y value, solid-soft tempe...

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Problems solved by technology

According to the traditional coal quality evaluation method, the coking coal of the Saaji mine in Australia has a G value of 75, a Y value of 16mm, a solid-soft temperature range of 51°C, a maximum Gibbs fluidity of 19ddpm, and a coarse-grained mosaic component content of 40%, which is evaluated as inferior coking coal. However, when the blending ratio is 18%, the thermal strength of coking coke reaches more than 66%, which is higher than the G value of 87, Y value of 20mm, solid-soft temperature range of 73°C, Gibbs maximum fluidity of 326ddpm, coarse-grained mosaic group 3 percentage points of coking coal with a content of 78% can be used as high-quality coking coal. If it is mistakenly used as low-quality coking coal, precious coking coal resources will be wasted

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