富铁镍渣煤基氢冶金等温还原动力学研究  

The research of isothermal reduction kinetics for iron-rich nickel slag by coal-based hydrogen metallurgy

作　　者：李彬[1,2] 孙明轩 王明华 雷鹏飞[3] 王晟[1,2] 杜雪岩[1,2] LI Bin;SUN Ming-xuan;WANG Ming-hua;LEI Peng-fei;WANG Sheng;DU Xue-yan(School of Materials Science and Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Research Institute of Hydrogen Metallurgy Technology,Jiuquan Iron&Steel(Group)Co.Ltd.,Jiayuguan 735100,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [3]酒泉钢铁(集团)有限责任公司氢冶金研究院,甘肃嘉峪关735100

出　　处：《兰州理工大学学报》2023年第2期24-29,共6页Journal of Lanzhou University of Technology

基　　金：甘肃省科技重大专项(19ZD2GD001),甘肃省自然科学基金(21JR7RA222,21JR7RA241)。

摘　　要：采用煤基氢冶金工艺对富铁镍渣中的铁组元进行高效还原,研究了不同温度下镍渣球团等温还原过程金属化率变化规律,利用粒子模型和未反应核模型对镍渣球团的煤基氢还原动力学过程进行分析讨论,明确了各反应阶段的控制环节并建立了相应动力学方程.研究表明:以高挥发分煤为还原介质,掺煤镍渣球团在1300℃还原焙烧20 min的金属化率可达90.2%;球团还原过程可分为反应初期、中期和后期3个阶段,其反应动力学分别受界面化学反应控制、反应-扩散混合控制和内扩散控制,反应表观活化能(E_(a))分别为174.01、124.15、83.14 kJ/mol.The iron in nickel slag was efficiently reduced by coal-based hydrogen metallurgy method.The variation of metallization rate for coal-containing nickel slag pellets during isothermal reduction at different temperatures was investigated.The kinetic of coal-based hydrogen reduction for nickel slag pellets was analyzed by grain model and unreacted core shrinking model.The control process of different reaction phase was determined with the corresponding kinetic equations established.The results showed that the metallization rate of coal-containing nickel slag pellets for 20 min reduction at 1300°C is 90.2%.The reaction kinetics of the initial,middle and final stages are dominated by interfacial chemical reaction control,reaction-diffusion mixed control,and internal diffusion control,and the corresponding apparent activation energies are 174.01 kJ/mol,124.15 kJ/mol and 83.14 kJ/mol,respectively.

关 键 词：富铁镍渣 煤基氢冶金 金属化率 还原动力学 

分 类 号：TF19[冶金工程—冶金物理化学]