不同煤阶煤焦炭显微结构与热性质的研究

Study on the microstructures and thermal properties of coke produced from different ranks of coals

采用模拟焦炭反应性和反应后强度,研究了不同变质程度单种煤焦炭显微结构与热性质之间的关系。中等变质阶段的焦煤、肥煤和瘦煤所制焦炭有较高的各向异性,低变质程度的气煤、1/3焦煤以及高变质程度的贫煤所制焦炭各向异性程度较低。焦炭的热性质与焦炭的各向异性有很好的相关性,焦炭反应性随各向异性程度的增大而减小,反应后强度则随各向异性的增大而增大。

The analogue coke reactivity and coke strength after reaction were adopted, the relation between thermal properties and microstructures of coke produced from single coal with different metamorphism was studied. The coke produced from medium rank of coal such as coking coal, fat coal and lean coal had higher anisotropy, however the coke produced from low rank gas coal, 1/3 coking coal and higher rank meager coal had lower anisotropy. The coke thermal properties and coke anisotropy had good correlation, the coke reactivity was reduced with the increase of anisotropy, while coke strength after reaction was increased with the increase of anisotropy.