含碳球团还原过程中粘接行为的量化研究  

Quantitative Research on Sticking Behavior of Iron Ore Pellets Containing Carbon in Reduction

作　　者：魏汝飞[1,2] 李家新[1] 龙红明[1] 王平[1] 施思强[1] 

机构地区：[1]安徽工业大学冶金与资源学院,安徽马鞍山243002 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁研究学报》2014年第5期13-16,65,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51274003)

摘　　要：通过负荷还原试验,在温度为分别为1173,1273和1373K,负荷为0.1MPa,N2流量为1.0L/min条件下对含碳球团还原过程的粘接行为进行了研究,并且对粘结临界状态进行了明确界定,对粘结指数的测定方法进行了改进。研究表明,含碳球团在还原过程中出现粘接现象,温度是影响粘结的重要因素,温度越高,粘接越严重,1373K时,含碳球团的粘结指数达到88.7%,粘结指数能够客观地反映出含碳球团在还原过程中的粘接情况,铁连晶和氧化亚铁连晶生长出界造成含碳球团的粘接,温度的升高,铁链晶和氧化亚铁连晶长大速度变大,使连晶生长出界的可能性变大,球团粘接变得严重。Sticking behavior of iron ore pellets containing carbon in reduction was investigated through the load re- duction experiment, at temperatures of 1173, 1273 and 1373K, load of 0. 1MPa, and N2 flow rate with 1.0L/min, and the sticking critical state was clearly defined, while the test method of sticking index（SI） was improved. The experiment has shown that the pellet sticking phenomenon appears in the reduction process, the temperature is an important factor affecting the sticking, and sticking becomes more severe with the temperature. The SI is 88.7% of the pellets at 1373 K. SI can objectively reflect the sticking situation of the pellets during the reduction process. Pellets＇sticking is caused by the iron and ferrous oxide crystals＇ growth out of bounds, when temperature rises, the probability of growth out of bounds becomes larger, so that pellets sticking became serious.

关 键 词：粘接行为 粘结指数 含碳球团 

分 类 号：TF046[冶金工程—冶金物理化学]