微波场中H_(2)还原磁铁矿行为研究  

Study on behavior of H_(2) reduction magnetite in microwave field

作　　者：万新宇 艾立群 洪陆阔 周美洁 佟帅 Wan Xinyu;Ai Liqun;Hong Lukuo;Zhou Meijie;Tong Shuai(Hydrogen Metallurgy Center,China Steel Research Technology Group Co.,Ltd.;North China University of Science and Technology;Metallurgical Automation Research and Design Institute Co.,Ltd.)

机构地区：[1]中国钢研科技集团有限公司氢冶金中心 [2]华北理工大学 [3]冶金自动化研究设计院有限公司

出　　处：《冶金能源》2025年第2期9-13,32,共6页Energy For Metallurgical Industry

基　　金：河北省高等学校科学技术研究项目(ZD2022125)。

摘　　要：为了研究微波场和常规场下H_(2)还原磁铁矿行为,在1173~1373 K下进行了磁铁矿还原实验。对比研究了微波加热和常规加热条件下,磁铁矿还原效果,矿物形貌以及微观组织。实验结果表明,微波加热的金属化率和还原度均高于常规加热的。当还原温度为1373 K,微波场60%H_(2)-Ar还原磁铁矿40 min时,金属化率达到92%;观察还原产物形貌,微波场可有效改善矿粉受热过程粘结现象;当还原温度为1173~1373 K,微波场条件下,H_(2)还原磁铁矿40 min,还原出的铁相均演化呈多孔蜂窝状结构。还原温度1373 K,微波场下金属Fe相完全泡沫化,此现象为泡沫铁的制备提供新思路。In order to study the behavior of H_(2) reduction of magnetite under microwave and conventional field,magnetite reduction experiments were carried out at 1173~1373 K.The reduction effect,morphology and microstructure of magnetite under microwave heating and conventional heating were studied.The experimental results show that the metallization rate and reduction degree of microwave heating are higher than those of conventional heating.At the temperature of 1373 K,the 60%H_(2)-Ar reduction magnetite in microwave field has a high metallization rate of 92%for 40 min.By observing the morphology of the reduced product,the bonding phenomenon of mineral powder during heating can be effectively improved under microwave field.At the temperature of 1173~1373 K in microwave field,the reduced iron phase evolved into a porous honeycomb structure after H_(2) reduction of magnetite for 40 min.At the reduction temperature of 1373 K,the metal Fe phase completely bubbles under microwave field,which provides a new idea for the preparation of foamed iron.

关 键 词：氢冶金 微波还原 磁铁矿 微观组织 

分 类 号：TF55[冶金工程—钢铁冶金]