镍渣煤基直接还原过程中金属铁颗粒的生长特性

doi:10.13228/j.boyuan.issn0449-749x.20190221

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Abstract The secondary resources in nickel slag can be effectively utilized by direct coal-based reduction. The growth characteristics and rules of metallic iron particles during the direct coal-based reduction of nickel slag under different conditions was described quantitatively, providing theoretical support for the development of subsequent grinding and magnetic separation processes, so as to achieve the purpose of efficient resource utilization of nickel slag. The microstructure of iron particles was observed by the scanning electron microscope. Image-Pro Plus Image analysis software was used to detect and analyze the size of metallic iron particles. The metallization rate of the reduced samples was measured. The results indicate that the coal-based direct reduction technology can effectively reduce the iron resources in nickel slag; the metallization rate of products shows a trend of first increasing and then stabilizing, and finally reaches 91.89% at 1 250 ℃ and 60 min;the average size of metallic iron particles in the reduced samples of nickel slag increases with the increase of time and temperature, and the increase of temperature is beneficial to the aggregation and growth of metallic iron particles in nickel slag; the average size of iron particle in the reduced samples increases up to 10.3 μm when the temperature is 1 250 ℃ and the reduction time is 60 min.

Key words： nickel slag direct reduction metallic iron phase particle size growth characteristics

Received: 20 May 2019

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	LI Xiao-ming
	LI Yi
	XING Xiang-dong

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LI Xiao-ming,LI Yi,XING Xiang-dong. Particle growth characteristics of metallic iron in direct coal-based reduction of nickel slag[J]. Iron and Steel, 2020, 55(3): 104-109.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190221 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I3/104

[1] 何焕华,蔡乔方.中国镍钴冶金[M].北京:冶金工业出版社,2000.(HE Huan-hua, CAI Qiao-fang. China Nickel-Cobalt Metallurgy[M]. Beijing: Metallurgical Industry Press,2000.)
[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, 2017, 31(3): 100.(LI Xiao-ming, SHEN Miao, WANG Chong, et al. Current situation and development of comprehensive utilization of nickel slag[J].Materials Review, 2017, 31(3): 100.)
[3] YU W, SUN T C, LIU ZZ, et al. Effect of particle sizes of iron ore and coal on the strength and reduction of high phosphorus oolitic hematite-coal composite briquettes[J]. ISIJ International, 2014, 54(1):56.
[4] 鲁逢霖, 郭玉华, 张颖异, 等. 镍渣直接还原磁选提铁试验[J]. 钢铁, 2014, 49(2):19.(LU Feng-lin, GUO Yu-hua, ZHANG Ying-yi, et al. Direct reduction and magnetic separating experiment of nickel slag for iron recovery[J]. Iron and Steel, 2014, 49(2):19.)
[5] 洪陆阔, 齐渊洪, 孙彩娇, 等. 钒钛磁铁矿煤基直接还原试验[J]. 钢铁, 2017, 52(11): 15.(HONG Lu-kuo, QI Yuan-hong, SUN Cai-jiao, et al. Direct reduction of coal based vanadium-bearing titanomagnetite[J]. Iron and Steel, 2017, 52(11): 15.)
[6] 李国洲,张燕云,马泳波,等. 镍冶金渣综合利用现状[J]. 中国冶金, 2017, 27(8): 1.(LI Guo-zhou,ZHANG Yan-yun,MA Yong-bo,et al. Comprehensive utilization of nickel metallurgical residue[J]. China Metallurgy, 2017, 27(8): 1.
[7] 李明明, 黄润, 钟正, 等. 硼砂对高磷鲕状赤铁矿强化还原[J]. 钢铁, 2018, 53(3): 10.(LI Ming-ming,HUANG Run,ZHONG Zheng, et al. Intensive reduction of high phosphorus oolitic hematite by borax[J]. Iron and Steel, 2018, 53(3): 10.)
[8] 雷家柳, 赵栋楠, 操昌. 硫酸渣煤基自还原制备铁颗粒试验[J]. 中国冶金, 2018, 28(11): 79. (LEI Jia-liu, ZHAO Dong-nan, CAO Chang. Experiment on preparation of iron particle by coal based self-reduction of sulfur acid residues[J]. China Metallurgy, 2018, 28(11): 79.)
[9] 尚海霞, 李海铭, 魏汝飞, 等. 钢铁尘泥的利用技术现状及展望[J]. 钢铁, 2019, 54(3): 9. (SHANG Hai-xia, LI Hai-ming, WEI Ru-fei, et al. Progress and trend on hot wide strip endless rolling technology[J]. Iron and Steel, 2019, 54(3): 9.)
[10] 周继程, 薛正良, 李宗强, 等. 高磷鲕状赤铁矿直接还原过程中铁颗粒长大特性研究[J]. 武汉科技大学学报:自然科学版, 2007, 30(5):458.(ZHOU Ji-cheng, XUE Zheng-liang, LI Zong-qiang, et al. Characteristics of grain growth of metallic phase in direct reduction of high phosphorus oolitic hematite[J]. Journal of Wuhan University of Science and Technology: Natural Science, 2007, 30(5): 458.)
[11] SUN Y S, HAN Y X, LIY F, et al. Formation and characterization of metallic iron grains in coal-based reduction of oolitic iron ore[J]. International Journal of Minerals, Metallurgy and Materials, 2017, 24(2):123.
[12] 闫龙飞,师学峰,赵凯,等. 高磷鲕状赤铁矿气基竖炉直接还原试验[J]. 钢铁, 2018, 53(2): 14. (YAN Long-fei,SHI Xue-feng,ZHAO Kai,et al. Experiment on direct reduction of gas-based shaft furnace of high phosphorus oolitic hematite[J].Iron and Steel, 2018, 53(2): 14.)
[13] GAO P, SUN Y S, REN D Z, et al. Growth of metallic iron particles during coal-based reduction of a rare earths-bearing iron ore[J].Minerals and Metallurgical Processing,2013, 30(1): 74.
[14] 梅贤恭, 袁明亮, 左文亮, 等.高铁赤泥煤基直接还原中铁晶粒成核及晶核长大动力学[J].中南工业大学学报, 1996, 27(2):159.(MEI Xian-gong, YUAN Ming-liang, ZUO Wen-liang, et al. Kinetics of the nucleation and grain growth of metallic phase in direct reduction of high-iron red mud with coal base[J]. Journal of Central South University of Technology,1996, 27(2):159.)
[15] 韩跃新, 马松勃, 高盈, 等.某镍冶炼炉渣深度还原过程中铁的成长特性研究[J].矿冶,2015, 24(1): 26.(HAN Yue-xin, MA Song-bo, GAO Ying, et al. Study on growth characteristics of metallic phaseindeepreduction of a nickel slag[J]. Mining and Metallurgy,2015, 24(1): 26.)
[16] 张显鹏, 刘素兰.硼铁矿石固相还原动力学[J].东北大学学报: 自然科学版, 1993, 14(1):28.(ZHANG Xian-peng, LIU Su-lan. Reduction kinetics of ludwigite ores[J]. Journal of Northeast University of Technology: Natural Science, 1993, 14(1):28.)
[17] 朱德庆, 春铁军, 潘建.低品位赤铁矿球团直接还原过程成核剂作用机理[J]. 北京科技大学学报, 2011, 33(11): 1325.(ZHU De-qing, CHUN Tie-jun, PAN Jian. Mechanism of action of improving reduction on low grade hematite pellets by adding nucleating agent[J]. Journal of University of Science and Technology Beijing, 2011, 33(11): 1325.)