微波加热内配碳酸钙高碳铬铁粉固相脱碳  

Solid-phase decarburization of high-carbon ferrochrome powders containing calcium carbonate by microwave heating

作　　者：陈津[1] 郝赳赳[1] 王晨亮[1] 郭丽娜[1] 孙宏飞[1] 刘金营[2] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]中国电子科技集团公司第十二研究所,北京100016

出　　处：《北京科技大学学报》2014年第12期1626-1633,共8页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金委员会与上海宝山钢铁集团公司钢铁研究联合基金资助项目(项目批准号:51174252)

摘　　要：高碳铬铁无渣脱碳法可避免有毒铬渣的排放,利用微波场可快速加热粉状物料的特性,在高碳铬铁粉中配加一定比例的碳酸钙粉,可实现高碳铬铁粉快速固相脱碳.实验结果表明：配加一定比例的碳酸钙粉,不会影响内配碳酸钙高碳铬铁粉混合物料的微波加热特性;提高混合物料的脱碳摩尔比、微波加热温度和保温时间,有利于高碳铬铁粉的深度脱碳,但相应加剧脱碳铬铁粉的氧化程度.合适的固相脱碳条件为：脱碳摩尔比1∶1.0-1∶1.4,微波加热温度1100℃,保温脱碳时间60 min.在上述条件下可使碳质量分数为8.16%的高碳铬铁粉脱碳至3.91%-1.71%,脱碳率为52.08%-79.04%.Non-slag decarburization of high-carbon ferrochrome can avoid toxic chromium slag emissions. Solid phase decarburization of high-carbon ferrochrome powder containing a certain proportion of calcium carbonate powder can be achieved using the characteristics of rapid heating powder materials in a microwave field. Experimental results show that adding a certain proportion of calcium carbonate powder does not affect the microwave heating characteristics of high-carbon ferrochrome powder. Deep decarburization of high-carbon ferrochrome powder is realized at a higher decarburization molar ratio of the mixed materials,a higher decarburization temperature,and a longer decarburization time,but the oxidation degree of decarburized ferrochrome powder is also increased accordingly. Under the suitable solid-phase decarburization conditions of the carburization molar ratio of 1 ∶ 1. 0-1 ∶ 1. 4,the microwave heating temperature of 1100 ℃ and the decarburization time of 60 min,the mass content of carbon in the decarburized materials is3. 91% to 1. 71%,and the decarburization rate is 52. 08% to 79. 04%.

关 键 词：铬铁合金 碳酸钙 脱碳 微波加热 

分 类 号：TF641[冶金工程—钢铁冶金]