Method for Improving Fineness and Particle Size Composition of Tamping Coke Blend Coal
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A technology for particle size composition and coal blending, applied in particle size analysis, coke oven, particle and sedimentation analysis, etc.
Active Publication Date: 2021-08-17
河北中煤旭阳能源有限公司 +1
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If the coal fineness is too large, it will cause coke cracks, resulting in a decrease in the cold strength of coke and a small block size, and the deterioration of the coking property of pulverized coal <0.5mm will lead to a decrease in coke strength
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Embodiment 1
[0043] Table 2 shows the performance indicators and proportions of various coal types.
[0044] coal type G value Y value / mm Original fineness / % HGI Proportion Fat coal 1 95 24 63.2 94 12％ Gas fat coal 93 23 40.7 57 20％ 1 / 3 coking coal 1 78 14 56.7 65 15％ coking coal 2 76 14 64.9 94 15％ coking coal 1 85 22 75.3 92 11％ lean coal 38 5 67.2 90 10％ weak caking coal 12 0 38.2 46 7％ lean coal 0 0 57.1 50 10％
[0045] 1) The Hastelloy grindability index of each single coal is measured, as shown in Table 2, the Hastelloy grindability index of gas-rich coal, weak caking coal and lean coal is <60, which is difficult to grind coal and needs to be pre-crushed.
[0046] 2) measure the original fineness (ratio of<3mm) of each single coal, as shown in table 2, the fineness<60% of gas fat coal, 1 / 3 coking coal 2, weak caking coal and lean coal, As coarse-grained coal, pre-crushing is requir...
Embodiment 2
[0052] Table 4 shows the performance indicators and proportions of various coal types.
[0053] coal type G value Y value / mm Original fineness / % HGI Proportion Fat coal 2 98 29 76.8 93 10％ Gas fat coal 93 23 40.7 57 22％ gas coal 70 11 50.3 55 8％ 1 / 3 coking coal 2 91 19 68.6 62 12％ coking coal 2 76 14 64.9 94 16％ coking coal 1 85 22 75.3 92 12％ lean coking coal 60 9 68.2 86 5％ lean coal 16 0 58.6 53 10％ Non-stick coal 0 0 62.1 45 5％
[0054] 1) The Hash Grindability Index of each single coal is measured, as shown in Table 4, the Hash Grindability Index <60 of gas-fertilized coal, gas coal, lean coal and non-caking coal is regarded as difficult-to-grind coal, Need to be pre-crushed.
[0055] 2) Measure the original fineness (the proportion of <3mm part) of each single coal, as shown in Table 4, the fineness<60% of gas-rich coal, gas coal, lean coal, as coarse coal ,...
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Abstract
The invention relates to a method for improving the fineness and particle size composition of tamping coke blend coal. The method combines Hastelloy's grindability index and original fineness to carry out pre-crushing on some difficult-to-grind coals or coals with relatively coarse primary particles, so as to make the pre-crushing more targeted; Lithographic analysis, based on the distribution ratio of each reflectance interval of the vitrinite to determine which type of coal caused the unqualified particle size, can quickly find the reason why the particle size of the matching coal is not up to the standard, and make targeted adjustments to avoid the current situation in order to improve the fineness of the matching coal. Raising the crushing level for all pre-crushed coals or mixed coals will not only cause some coals to be too finely crushed, but also increase energy consumption; through targeted crushing, the proportion of >5mm and <0.5mm parts will be controlled to achieve the best coal in the furnace. Granular composition. Through the method, the coke obtained by coking can achieve high strength and bulkiness, and the quality level can be improved.
Description
technical field [0001] The invention belongs to the field of coking in the coking industry, and in particular relates to a method for improving the fineness and particle size composition of tamp coking blend coal. Background technique [0002] The pulverization fineness and particle size composition of coal have a great influence on the quality of coke. Studies have shown that optimizing the fineness of coal blending can improve the caking ability of blended coal, thereby improving the quality of coke. However, the composition of each particle size of the furnace coal with the same fineness is very different, and the quality of the coke produced will also be very different. Various raw coals and different lithofacies in the same raw coal have different coking and pulverization properties. Generally, low-metamorphic coals such as long-flame coals, weakly caking coals, and gas coals, and lean coals, lean coals, and lean coals High metamorphic coal is difficult to grind, and t...
Claims
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