捣固焦微观结构研究  

Study on the Microstructure of Stamp Charging Coke

作　　者：高冰[1] 张建良[1] 孔德文 左海滨[3] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]河北钢铁集团唐山钢铁股份有限公司,河北唐山063020 [3]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《东北大学学报（自然科学版）》2016年第1期64-68,73,共6页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展计划项目(2012CB720401)

摘　　要：结合捣固炼焦工艺的特点，研究了高堆积密度配煤炼焦对焦炭微观结构的影响．结果表明，捣固炼焦工艺对焦炭气孔结构影响明显．采用N：吸附法研究发现，9种捣固焦以小于10nm的中、小气孔为主，平均气孔直径小，比表面积分布广泛；3种顶装焦存在一定数量20—50nm的中孔，平均气孔直径大，比表面积小．捣固焦总气孔率、显气孔率和显气孔比例基本均低于顶装焦，捣固焦的假密度明显高于顶装焦，真密度相差不大，假密度可作为区分捣固焦与顶装焦的简易方法．焦炭光学组织主要取决于配合煤性质，捣固焦与顶装焦无明显区别．Applying the stamp charging technology, the effect of high-bulk-density coal blending on the microstructure of coke was investigated. The results showed that the pore structure of coke was greatly influenced by the stamp charging technology. The pore structure of cokes was examined by using N2 adsorption technology. All 9 kinds of stamp charging coke contained mainly medium and small pores whose sizes were less than 10 nm. The mean pore diameter was small and the specific surface area distributed widely. However, 3 kinds of top charging coke all contained a certain amount of medium pores of 20 - 50 nm. The mean pore diameter was larger and the specific surface area was smaller. Compared with the top charging coke, the total porosity, apparent porosity and apparent porosity ratio of stamp charging coke were almost all smaller. The true density was nearly the same and the apparent density was lower obviously. So, it is easy to distinguish the top charging coke and stamp charging coke according to the apparent density. The optical textures of coke depend mainly on the quality of coal blends, while there is no significant difference between top charging coke and stamp charging coke.

关 键 词：捣固焦 顶装焦 气孔结构 光学组织 假密度 

分 类 号：TF526.1[冶金工程—钢铁冶金]