不同变质程度煤焦炭光学组织与冷热性能

 为研究煤的变质程度对焦炭光学组织的影响以及焦炭光学组织和冷热性能的关系,对30余种炼焦煤的镜质体最大反射率以及成焦后焦炭的光学组织和冷热性能进行测试。结果表明,焦炭的光学组织随炼焦煤的变质程度呈现规律性变化,镶嵌结构体积分数随镜质体最大反射率变化可分为快速增加、平稳和缓慢下降3 个阶段;∑ISO 体积分数随镜质体最大反射率的变化趋势与之相反。焦炭的冷热性能和光学组织体积分数之间可以建立回归方程,焦炭的反应性随着∑ISO体积分数的增加而升高,而反应后强度随镶嵌结构体积分数的增加而升高。回归方程用于指导炼焦生产后,经济效益显著。

Optical structure and thermal and cold properties of different rank coal coke

In order to study the influence of coal metamorphism on coke optical structure and the relationship between coke optical structure and cold-hot properties, the maximum reflectance of vitrinite of more than 30 coking coals and the optical structure and cold and hot properties of coke after coking were tested.The results demonstrated that coke optical textures displayed regular changes with the degrees of coal metamorphism. The results show that the optical structure of coke changes regularly with the degree of metamorphism of coking coal, and the volume percent of mosaic structure can be divided into three stages: rapid increase, steady and slow decrease with the maximum reflectance of vitrinite; the change trend of ∑ISO volume percent with the maximum reflectance of vitrinite is opposite. A regression equation can be established between the thermal and cold properties of coke and the volume percent of optical structure. The reactivity of coke increases with the increase of ∑ISO volume percent, while the strength after reaction increases with the increase of the volume percent of mosaic structure. After the regression equation is used to guide coking production, the economic benefit is remarkable.