炼焦煤的热解过程研究

通过模拟炼焦过程对不同变质程度的炼焦煤加热至不同温度，运用HD型偏光显微镜及红外分析技术对加热后的固体产物进行分析。结果表明：炼焦煤受热时其镜质组首先产生破碎现象，然后软化熔融，同一种炼焦煤中的镜质组受热变化并不均一，不同变质程度炼焦煤中的镜质组破碎程度和软化程度也不相同；炼焦煤加热到固化温度时，热解固体产物全部呈现出焦炭光学特征，随温度的升高，固体产物的光学组织组成继续发生改变；试验样品中的肥煤和1/3焦煤在热解过程中有机质分子结构随温度的升高，其变化规律相似。

Study on pyrolyzing process of coking coals

Different ranks coking coals were heated to different temperatures by simulating coking process,and the heated residues were studied by making use of HD-type polarizing microscope and IR spectrum.The results indicate that the vitrinite of coal begin to break firstly,then soften and melt in pyrolyzing process.The vitrinite of the same coking coal change differently,furthermore,the degrees of breaking and softening owe different for vitrinite of different rank coals.When coal is heated to solidifying temperature,its pyrolyzing products show the optical characteristics of coke.As the temperature rises,the optical textures change sequentially.Molecular structure of organic matter of 1/3 coking coal and fatty coal as this test samples change similarly in the process of pyrolysis.