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

Abstract

Abstract: 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 1 300 °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.

Key words: iron-rich nickel slag, coal-based hydrogen metallurgy, metallization rate, kinetics

CLC Number:

TF19

LI Bin, SUN Ming-xuan, WANG Ming-hua, LEI Peng-fei, WANG Sheng, DU Xue-yan. The research of isothermal reduction kinetics for iron-rich nickel slag by coal-based hydrogen metallurgy[J]. Journal of Lanzhou University of Technology, 2023, 49(2): 24-29.

References

[1] 马泳波,杜雪岩,KAKIMOV A,等.富铁镍渣综合利用的研究和进展综述 [J].矿产综合利用,2018(6):25-31.
[2] 李小明,沈苗,王翀,等.镍渣资源化利用现状及发展趋势分析 [J].材料导报A,2017,31(3):100-105.
[3] 郭亚光,朱荣,王云,等.镍渣煤基熔融还原提铁工艺基础研究 [J].工业加热,2015,44(6):40-43.
[4] 郭亚光,朱荣,裴忠治,等.镍渣熔融还原提铁动力学 [J].中国有色冶金,2017,46(5):75-80.
[5] 倪文,马明生,王亚利,等.熔融还原法镍渣炼铁的热力学和动力学 [J].工程科学学报,2009,31(2):163-168.
[6] LI X M,LI Y,ZHANG X Y,et al.Growth characteristics of metallic iron particles in the direct reduction of nickel slag [J].Metallurgical and Materials Transactions B,2020,51(3):925-936.
[7] LI X M,YANG H B,RUAN I B,et al.Effect of mechanical activation on enhancement of carbothermal reduction of nickel slag [J].Journal of Iron and Steel Research International,2020,27(22):1311-1321.
[8] 马松勃,韩跃新.煤基还原法从镍冶炼渣中提取有价金属的研究 [J].中国矿业大学学报,2014,43(2):305-308.
[9] 张小兵,王明华,寇明月.煤基氢冶金绿色短流程制钢新工艺探索性试验研究 [J].矿冶工程,2021,41(6):174-177.
[10] YI L Y,HUANG Z C,PENG H,et al.Action rules of H₂ and CO in gas-based direct reduction of iron ore pellets [J].Journal of Central South University,2012,19(8):2291-2296.
[11] WANG Z C,CHU M S,LIU Z G,et al.Effects of temperature and atmosphere on pellets reduction swelling index [J].Journal of Iron and Steel Research International,2012,19(10):7-12.
[12] 闫树芳,孙体昌,许言.煤种对嘉峪关某菱铁矿直接还原的影响 [J].中国有色金属学报,2012,22(5):1462-1467.
[13] YU W,SUN T C,CUI Q,et al.Effect of coal type on the reduction and magnetic separation of a high-phosphorus oolitic hematite ore [J].ISIJ International,2015,55(3):536-543.
[14] AHN H,CHOI S.A comparison of the shrinking core model and the grain model for the iron ore pellet indurator simulation [J].Computers & Chemical Engineering,2017,97:13-26.
[15] NOURI S M M,EBRAHIM H A,JAMSHIDI E.Simulation of direct reduction reactor by the grain model [J].Chemical Engineering Journal,2011,166(2):704-709.
[16] ABRAHAM J B M,ALIAKSANDR A,JOSEPH K B.Application of different models for the prediction of the kinetics of direct reduction of natural iron ores [J].Geomaterials,2017,7(4):117-131.
[17] RAHIMI A,NIKSIAR A.A general model for moving-bed reactors with multiple chemical reactions,Part II:effect of kinetic model [J].International Journal of Mineral Processing 2013,124:67-74.
[18] ARIYAN Z G,SADEGH V M,MOJTABA B.Numerical analysis of complicated heat and mass transfer inside a wustite pellet during reducing to sponge iron by H₂ and CO gaseous mixture [J].Journal of Iron and Steel Research International,2016,23(11):1142-1150.
[19] MOSLIM N A M,SIVAKUMAR R,REZAN S A,et al.Isothermal and non-isothermal kinetic modelling of carbothermal reduction of Titanium Dioxide-Iron (II) Oxide (TiO₂-Fe₂O₃) composite with natural gas [J].Materials Today:Proceedings,2019,17:655-663.
[20] USUI T,NAKAMURO Y,NISHI M,et al.Gaseous reduction model for sinter in consideration of calcium ferrite reaction process (unreacted-core shrinking model for six interfaces) [J].Isij International,2015,55(8):1617-1624.
[21] LI N,WANG F,ZHANG W,et al.Effects of carbon-containing pellet shapes on its direct reduction process:A numerical study [J].Transactions of the Indian Institute of Merals,2021,74(1):21-31.
[22] SPREITZER D,SCHENK J.Reduction of iron oxides with hydrogen—A review [J].Steel Research International,2019,90(10):1900108.
[23] MOUSA E A,BABICH A,SENK D.Reduction behavior of iron ore pellets with simulated coke oven gas and natural gas [J].Steel Research International,2013,84(11):1085-1097.
[24] 周琦,段德东,郑诚.纳米多孔Ni的制备及其电催化析氢性能研究 [J].兰州理工大学学报,2020,46(3):7-12.
[25] ZHANG L,ZHU Y,YIN W Z,et al.Isothermal coal-based reduction kinetics of fayalite in copper slag [J].ACS Omega,2020,5:8605-8612.