焦炭光学组织与微晶结构之间的关系研究
Relationship between optical texture and microcrystalline structure of coke
王越 1庞克亮 1侯士彬 2吴昊天 1谷致远 1刘福军 3赵华3
作者信息
- 1. 鞍钢集团北京研究院有限公司,北京 102200
- 2. 鞍钢股份有限公司炼焦总厂,辽宁 鞍山 114021
- 3. 鞍钢集团钢铁研究院,辽宁 鞍山 114009
- 折叠
摘要
利用 5 种不同变质程度的炼焦煤及 4 种沥青分别进行 6 组二元配煤炭化试验以及 12 组炼焦煤与沥青共炭化试验,研究 5 种单种炼焦煤、6 种配煤以及 12 种共炭化制备焦炭的光学组织指数(OTI)与晶面间距和微晶高度之间的关系.结果表明:单种炼焦煤制备焦炭的OTI指数与晶面间距和微晶高度呈规律性变化,与炼焦煤的变质程度相关.配煤及共炭化制备焦炭的OTI指数与晶面间距和微晶高度之间无明显规律.当OTI＜1 时,相当于光学各向同性组织向细粒镶嵌状组织转变阶段,中间相小球体流动并发生融并,微晶结构缺陷得以消除,焦炭微晶结构的定向化程度提高;当OTI＞2 时,晶面间距的降低程度以及微晶高度的增大程度均趋缓.
Abstract
Six groups of binary coal blending carbonization experiments and 12 groups of coking coal and asphalt co-carbonization experiments were conducted with 5 coking coals with different degrees of metamorphism and 4 types of asphalt,respectively.The study was conducted on the relationships between the optical texture index(OTI)and interplanar spacing,microcrystalline height of cokes prepared with 5 single coking coals with different metamorphisms,6 blended coals and 12 co-carbonizations.The results showed that the interplanar spacing and microcrystalline height of cokes prepared from single coking coals varied regularly with the OTI,which was related to the metamorphic grade of coking coals.There were no obvious relationships between the interplanar spacing,microcrystalline height and OTI of cokes prepared by binary blending and co-carbonization.When OTI＜1,which was equivalent to the transformation from isotropic texture to fine mosaic texture,the mesophase flowed and melted,the defects in microcrystalline structure were eliminated,and the orientation degree of coke microcrystalline structure was improved.When OTI＞2,both the interplanar spacing decrease and microcrystalline height increase slowed down.
关键词
焦炭/光学组织/微晶结构/OTI指数/中间相Key words
coke/optical texture/microcrystalline structure/OTI/mesophase引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据