热处理对灵武煤成浆性的影响——灵武煤改质制取高浓度水煤浆研究之二

Heat—treatment Effect on Slurryability of Lingwu Coal

本文对灵武、羊肠湾、神木和大同四种煤在不同热处理温度下对煤的成浆性影响做了较为系统的考察,得出一些有意义的规律。实验结果表明:热处理可以改善低阶煤的成浆性,但其改善程度由于原煤的煤化程度不同等原因而存在着一定的差异。

Several low-rank coals were selected and heat-treated at different temperatues. The results show that slurryability of low-rank coal can be impr-oved through heat-treatment and that the extent of improvement on slurryability depends on the rank of coal. During the heat-treament of coal, the decomposi-tion of the active oxygen-bearing functional groups on coal surface, the great increase in the hydophobicity coal surface, the notable reduction in the moisture holding capacity, and the remarkable surface shrinkage of coal are the principle factors for the above improvement.