Caking and coking properties of the thermal dissolution soluble fraction of a fat coal
Caking and coking properties of the thermal dissolution soluble fraction of a fat coal
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DOI：
10.1016/j.fuproc.2013.08.013
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发表时间：
2014-02
影响因子：
7.5
通讯作者：
H. Shui;Wen-juan Zhao;Chuanjun Shan;Taotao Shui;C. Pan;Zhicai Wang;Z. Lei;S. Ren;Shigang Kang-Shigang
中科院分区：
文献类型：
--
作者：
H. Shui;Wen-juan Zhao;Chuanjun Shan;Taotao Shui;C. Pan;Zhicai Wang;Z. Lei;S. Ren;Shigang Kang-Shigang
在炼焦配煤中，肥煤对配煤的结块和结焦性能起着非常重要的作用。本文对一种肥煤进行了热溶，研究了不同溶剂和温度下热溶可溶性组分（TDSFs）的结块和结焦性能。结果表明，TDSFs的结块性能优于脂肪原煤。在相同的热溶温度下，由非极性溶剂制备的TDSFs比由极性溶剂制备的TDSFs具有更高的结块性能。在TD过程中，极性溶剂可以将更多的多芳香族化合物热溶到TDSF中，从而提高了TDSF的软化温度，降低了TDSF的结块性能。对于相同的TD溶剂，高温制得的TDSFs比低温制得的TDSFs具有更低的结块性能，因为其中含有更多的芳香族成分和氧官能团。采用坩埚焦化法评价了TDSFs的焦化性能。结果表明，在配煤中分别用5%的TDSF和5%的无结块亚烟煤代替等量的肥煤和气煤，得到的焦炭质量可达到标准配煤（即不含TDSF和亚烟煤）的焦炭质量水平。因此，利用TDSF配煤炼焦是开发焦煤资源的有效方法之一。
In the coal blending for coke-making, fat coal has a very important role for the caking and coking properties of the coal blends. In this study, a fat coal was thermally dissolved, and the caking and coking properties of the thermal dissolution soluble factions (TDSFs) from different solvents and temperatures were characterized. It was found that the caking properties of TDSFs were better than that of fat raw coal. The TDSFs obtained from non-polar solvents have a higher caking property than those obtained from polar solvents at the same thermal dissolution (TD) temperature. During TD process, polar solvents can thermally dissolve more polyaromatic compounds into TDSF, thus increasing the softening temperature and decreasing the caking property of the TDSF. For the same TD solvent, the TDSFs obtained from higher temperatures have a lower caking property compared to those obtained from lower temperatures because of more aromatic components and oxygen functional groups entering them. Crucible coking determinations were carried out to evaluate the coking property of the TDSFs. The result suggests that when 5% of TDSF and 5% of non-caking sub-bituminous coal were used instead of the same amount of fat coal and gas coal, respectively in the coal blends, the quality of the coke obtained could get to the level of the coke obtained from the standard coal blends (i.e. without TDSF and sub-bituminous coal). Therefore, the use of TDSF in coal blending for coke-making is one of the effective methods for opening the coking coal resources.