摘要
添加有机粘结剂代替部分膨润土是减少成品球团矿的脉石含量的有效途径之一。通过残烧实验和XRD研究了膨润土与有机粘结剂间的相互作用,结果表明有机复合粘结剂比原始膨润土的晶层间距增加了0.08 nm。造球和焙烧实验结果表明,添加有机粘结剂替代膨润土可以提高生球落下和抗压强度。气基还原实验结果表明,添加有机粘结剂替代0.5%(质量分数)膨润土可以提高球团矿还原性,还原粘接指数也同时升高。SEM显微结果表明,添加有机复合粘结剂可以提高球团矿的孔隙率,有利于还原气体进入球团矿内部,从而改善球团矿的还原性。为制备有机复合粘结剂球团矿提供了参考,有助于扩大有机复合粘结剂在炼铁中的应用。
Adding organic binder instead of bentonite is one of the effective ways to reduce the gangue content of pellet.The interaction between bentonite and organic binder was studied by residual burning experiment and XRD.The result shows that the crystal layer spacing of organic composite binder increases by 0.08 nm compared with the original bentonite.The results of palletization and roasting experiments show that the drop number and compressive strength of green pellets can be improved by adding organic binder instead of bentonite.The experimental results show that adding organic binder instead of 0.5 mass%bentonite can improve the reducibility and sticking index of pellets.SEM microscopic results show that the addition of organic composite binder can improve the porosity of pellets,which is conducive to reducing gas entering into the pellets,so as to improve the reducibility of pellets.The research can provide a reference for the preparation of organic composite binder pellets and helps to expand the application of organic composite binder in iron making.
作者
徐晨阳
张建良
刘征建
王耀祖
郑安阳
马黎明
XU Chenyang;ZHANG Jianliang;LIU Zhengjian;WANG Yaozu;ZHENG Anyang;MA Liming(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Institute of Artificial Intelligence,University of Science and Technology Beijing,Beijing 100083,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2021年第11期1154-1160,共7页
Journal of Iron and Steel Research
关键词
气基直接还原
球团矿
有机粘结剂
还原粘结
相互作用
gas-based direct reduction
pellet
organic binder
reduction sticking
interaction
作者简介
徐晨阳(1995-),女,博士,E-mail:XXXU_chenyang@163.com;通讯作者:刘征建(1982-),男,博士,教授,E-mail:liuzhengjian@ustb.edu.cn。
