Modification treatment method for weak caking coal or non-caking coal
A technology for non-stick coal and weakly sticky coal, which is applied in the field of improving the cohesion and coking performance of weakly sticky or non-sticky coal by means of steam treatment and modification, so as to achieve the effect of improving the cohesion and coking property.
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Embodiment 1
[0011] Taking Shenfu coal as an example, Shenfu coal was subjected to steam treatment at 100°C in the test. The amount of steam introduced was twice the mass of the coal sample, and the particle size of the coal sample was less than 3mm. After steam treatment, the extraction rate of Shenfu coal in N-methyl-2 pyrrolidone / carbon disulfide mixed solvent (1:1 volume ratio) increased by 65%, the caking index G value increased by 60%, and the oxygen content decreased 4.5%. Compared with the basic proportion of raw coal, the microstrength of coke obtained after coking with water heat treatment coal (crucible coke) is increased by 3.1%, and the CO 2 The reactive CRI decreased by 2.5%, and the post-reactive intensity CRS increased by 8.9%.
Embodiment 2
[0013] Taking Shenfu coal as an example, Shenfu coal was subjected to steam treatment at 250°C in the test. The amount of steam introduced was twice the mass of the coal sample, and the particle size of the coal sample was less than 3mm. After steam treatment, the extraction rate of Shenfu coal in N-methyl-2 pyrrolidone / carbon disulfide mixed solvent (1:1 volume ratio) increased by 150%, the caking index G value increased by 160%, and the oxygen content decreased 8.5%. Compared with the basic proportion of raw coal, the microstrength of the coke obtained after coking with water heat treatment coal (crucible coke) is increased by 6.1%, and the CO 2 The reactive CRI decreased by 12.5%, and the post-reactive intensity CRS increased by 28.9%.
Embodiment 3
[0015] Taking Shenfu coal as an example, Shenfu coal was subjected to steam treatment at 100°C in the test. The amount of steam introduced was 1 times the mass of the coal sample, and the particle size of the coal sample was less than 3mm. After steam treatment, the extraction rate of Shenfu coal in N-methyl-2 pyrrolidone / carbon disulfide mixed solvent (1:1 volume ratio) increased by 26%, the caking index G value increased by 40%, and the oxygen content decreased 3.5%. Compared with the basic proportion of raw coal, the microstrength of coke obtained after coking with water heat treatment coal (crucible coke) is increased by 2.1%, and the CO 2 The reactive CRI decreased by 2.0%, and the post-reactive intensity CRS increased by 6.9%.
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