Abstract：Rotary hearth furnace is a typical representative process used for processing dust and sludge containing iron and zinc from steel enterprise. It can effectively utilize iron, carbon and calcium oxide in dust and sludge to produce metallized pellet and oxidation of zinc powder. Rotary hearth furnace has a good processing effect and economic benefit, which will be the development tendency of treating iron-bearing dust and sludge for steel enterprise. In this paper, based on the process of treating iron-bearing dust and sludge by the rotary bottom furnace, many key technologies were analyzed and discussed. Reasonable suggestions on material selection, forming technology, burdening optimization, slag system optimization and control of zinc were put forward combined with production practice and laboratory research for rotary hearth furnace. Through this article, it is hoped to provide a reference for the improvement and innovation of the treatment technology of iron-bearing dust and sludge by the rotary bottom furnace.
毛瑞, 王飞, 金海, 茅沈栋. 转底炉工艺处理含铁尘泥关键技术[J]. 钢铁, 2020, 55(8): 199-205.
MAO Rui, WANG Fei, JIN Hai, MAO Shen-dong. Key technology of treating iron-bearing dust and sludge by rotary hearth furnace process[J]. Iron and Steel, 2020, 55(8): 199-205.
[1] 刘百臣, 魏国, 沈峰满, 等. 钢铁厂尘泥资源化管理与利用[J]. 材料与冶金学报, 2006, 5(3): 231.(LIU Bai-chen, WEI Guo, SHEN Feng-man, et al. Comprehensive utilization and management of dust and sludge as resource in iron and steel plants[J]. Journal of Materials and Metallurgy, 2006, 5(3): 231.) [2] 陈砚雄, 冯万静. 钢铁企业粉尘的综合处理与利用[J]. 烧结球团, 2005, 30(5): 42.(CHEN Yan-xiong, FENG Wan-jing. Study on the centralized treatment and comprehensive utilization of metallurgical dust[J]. Sintering and Pelletizing, 2005, 30(5): 42.) [3] 刘自民,饶磊,桂满城,等. 马钢含铁尘泥综合利用研究与实践[J]. 中国冶金, 2018, 28(9): 71.(LIU Zi-min,RAO Lei,GUI Man-cheng,et al. Research and practice of comprehensive utilization of Fe-containing dust in Masteel[J]. China Metallurgy, 2018, 28(9): 71.) [4] 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. Present situation and prospect of iron and steel dust and sludge utilization technology[J]. Iron and Steel, 2019, 54(3): 9.) [5] 王桂林,刘征建,张建良,等. 基于OxyCup竖炉处理工艺的尘泥团块软熔性能[J]. 中国冶金, 2018, 28(11): 61.(WANG Gui-lin,LIU Zheng-jian,ZHANG Jian-liang,et al. Soft-melting property of dust briquettes based on OxyCup shaft furnace[J]. China Metallurgy, 2018, 28(11): 61.) [6] XIA Lei-ge, MAO Rui, ZHANG Jian-liang, et al. Reduction process and zinc removal from composite briquettes composed of dust and sludge from a steel enterprise[J]. International Journal of Minerals, Metallurgy and Materials, 2015, 22(2): 122. [7] 高金涛, 李士琦, 张延玲, 等. 低温分离、富集冶金粉尘中的Zn[J]. 中国有色金属学报, 2012, 22(9): 2692.(GAO Jin-tao, LI Shi-qi, ZHANG Yan-ling, et al. Separating and enriching zinc from metallurgical dust at low temperature[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(9):2692.) [8] 魏秀泉,马腾飞,佘雪峰.含锌尘泥中锌铅及碱金属脱除研究[J].冶金能源 ,2019,38(1):54.( Wei Xiu-quan, MA Teng-fei ,SHE Xue-feng.Removal of zinc, lead and alkali metals from zinc-bearing dust[J]. Energy for Metallurgical Industry,2019,38(1):54. [9] 佘雪峰, 薛庆国, 王静松, 等. 钢铁厂含锌粉尘综合利用及相关处理工艺比较[J]. 炼铁, 2010, 29(4): 56.(SHE Xue-feng, XUE Qing-guo, WANG Jing-song, et al. Comprehensive utilization and comparison of related process for zinc dust from iron and steel plant[J]. Ironmaking, 2010, 29(4):56.) [10] 高志芳, 苏畅, 李娜, 等. 冶金尘泥制备钙铁双氧载体材料[J]. 钢铁研究学报, 2018, 30(10): 782.(GAO Zhi-fang, SU Chang, LI Na, et al. Preparation of Ca-Fe oxygen carrier using metallurgical dust[J]. Journal of Iron and Steel Research, 2018, 30(10): 782.) [11] 毛瑞, 张建良, 刘征建, 等. 钢铁厂含铁尘泥球团自还原实验研究[J]. 东北大学学报:自然科学版, 2015, 36(6): 790.(MAO Rui, ZHANG Jian-liang, LIU Zheng-jian, et al. Experimental studies on self-reduction for pellets made of iron-contained dust and sludge from a steel enterprise[J]. Journal of Northeastern University: Natural Science, 2015, 36(6): 790.) [12] Senk Dieter, Gudenau Heinrich Wilhelm, Geimer Stephan, et al. Dust injection in iron and steel metallurgy[J]. ISIJ International, 2006, 46(12): 1745. [13] Su Fen-wei, Lampinen H O, Robinson R. Recycling of sludge and dust to the BOF converter by cold bonded pelletizing[J]. ISIJ International, 2004, 44(4): 770. [14] 毛瑞, 任立群, 杜屏, 等. 含铁尘泥金属化球团的合理渣系[J]. 钢铁研究学报, 2017, 29(5): 357.(MAO Rui,REN Li-qun,DU Ping.Reasonable slag system for metallized pellet made of dust and sludge containing iron[J].Journal of Iron and Steel Research, 2017, 29(5): 357.) [15] 彭程, 范建峰. 宝钢转底炉工艺技术发展[J]. 钢铁, 2019, 54(3): 9.(PENG Cheng, FAN Jian-feng. Rotary hearth furnace process development in Baosteel[J]. Iron and Steel, 2019, 54(3): 9.) [16] Makkonen H T, Heino J, Laitila L, et al. Optimization of steel plant recycling in Finland: Dusts, scales and sludge[J]. Resources, Conservation and Recycling, 2002, 35: 77. [17] 胡俊鸽, 杜续恩, 周文涛. 工业化转底炉炼铁技术的现状及评述[J]. 烧结球团, 2013, 38(1): 36.(HU Jun-ge, DU Xu-en, ZHOU Wen-tao. Present situation of industrialized RHF technology and its review[J]. Sintering and Pelletizing, 2013, 38(1): 36.)
2020, Vol. 55 
