高炉用冶金焦与兰炭气化反应行为研究  

STUDY ON GASIFICATION REACTION BEHAVIORS OF METALLURGICAL COKE AND SEMI-COKE FOR BLAST FURNACE

作　　者：高冰[1] 张建良[1] 左海滨[2] 郑常乐[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京博士生100083 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京副教授100083

出　　处：《煤炭转化》2015年第2期62-65,共4页Coal Conversion

基　　金：国家重点基础研究发展计划(973)项目(2012CB720401)

摘　　要：通过实验室模拟高炉反应条件,对高温下冶金焦炭、兰炭与CO2气化反应特性进行研究,并结合兰炭微观结构分析了其反应机理.结果表明,兰炭起始反应温度低,气化反应速率远高于冶金焦炭,并且随着温度升高而迅速增加.富碱后,碱金属可以分布到兰炭内部,使兰炭在较长时间内保持较高的反应速率.冶金焦炭结构致密,镶嵌组织含量高;兰炭结构呈层片状,比表面积大,各向同性组织含量高,易与CO2发生反应.The gasification reaction behaviors of metallurgical coke and semi-coke were investigated by simulating the conditions of blast furnace. The microstructures of semi-coke were tested by SEM and LOM in order to explain the mechanism of reaction. It is shown that the beginning reaction temperature of semi-coke was low. The reaction rate of semi-coke was much higher than metallurgical coke, which increased quickly with the reaction temperature increasing. After alkali-rich, the alkalis could get into the inside of semi-coke, which lead to high reaction rate of semi-coke for long time. The microstructures of coke are compact which contains lots of mosaic textures. However, the microstructures of semi-coke which contains lots of isotropic texture are lamella in shape that resulted in large specific area. Therefore, the semi-coke was easy to react with CO2 at high temperature.

关 键 词：兰炭 冶金焦 气化反应 碱金属 

分 类 号：TQ546[化学工程—煤化学工程]