Method for improving fineness and particle size composition of stamped coke blended coal
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A technology of particle size composition and coal blending, applied in particle size analysis, coke oven, particle and sedimentation analysis, etc., can solve problems such as coke strength decrease, coke cold strength decrease, coke cracks, etc.
Active Publication Date: 2020-08-28
河北中煤旭阳能源有限公司 +1
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Problems solved by technology
If the coal fineness is too large, it will cause coke cracks, resulting in a decrease in the cold strength of coke and a smal
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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 fineness and particle size composition of stamped coke blended coal. According to the method, the Hardgrove grindability index and the original finenessare combined, coal difficult to grind or coal with coarse original particles is pre-ground, and pre-grinding is more targeted; through coal petrography analysis on coal having a size of greater than3mm in blended coal, which kind of coal causes unqualified granularity can be judged according to the distribution proportion of each reflectivity interval of vitrinite, the reason why the particle size of the blended coal does not reach the standard can be quickly found and adjusted in a targeted mode, and the situation that in order to improve the fineness of the blended coal, the smashing levelof all pre-smashed coal or blended coal is improved, part of coal is smashed too finely, and energy consumption is increased is avoided. The optimal particle size composition of the coal as fired isachieved by specifically crushing and controlling the ratio of the part with the particle size of more than 5mm to the part with the particle size of less than 0.5 mm. By adopting the method, the cokeobtained by coking achieves high strength and large lumpiness, and the quality level is 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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