《工程科学学报》录用稿，htps:/doi.org/10.13374/i,issn2095-9389.2021.06.30.003©北京科技大学2020 工程科学学报DO: 新型复合粘结剂提高生球质量的作用机理及 构效关系研究 雷杰)，汪名赫”，周江虹)，孙社生)，龙红明)四 1)安徽工业大学治金工程学院，安微马鞍山2430322)马鞍山钢铁股份有限公司制造部，安徽马鞍山243000 ☒通信作者，E-mail:龙红明，yaflhm@l26.com 摘要降低膨润土用量是提高球团品位、实现节能减排的有效途径之一。基于新型高效复合粘结剂，通 过生球制备、线性拟合分析、生球力学特征分析等手段研究了复合粘结剂对生球质量的影响规律及与重要 指标的构效关系，阐明了复合粘结剂提高生球质量的作用机理。结果表明：配比为2%膨润土+0.028%有 机粘结剂的复合粘结剂球团，落下强度达到6.2次(0.5m、抗压强度达到4.5NP、爆裂温度达到 542℃，与2.0%膨润土球团相比，生球质量相近，但膨润士消耗减少40%基于构效关系分析，有机粘结 剂对生球落下强度、爆裂温度作用显著，膨润土对干球强度影响瘦大，有机粘结剂通过增强颗粒的亲水性、 毛细力和黏性力强化了生球落下强度，干燥时在表层形成少量孔隙 有利于球团内水分的排出，提高了生 球爆裂温度，干燥后以固态连接桥的形式强化干球强度，但是孔隙的位点和尺寸可能会降低干球强度，因 此，对干球强度起决定性作用的是膨润土，有机粘结刹对球强度的影响呈现多面性。 关键词球团：复合粘结剂：生球质量：作用机理构效送 分类号TF521.6 Research on the mechanism and structure-activity relationship of new composite binder to improve the quality of green pellets LEI Jie,WANG Min Jianghong SUN Shesheng)LONG Hongming School of Metallurg ineering,Anhui University of Technology,Ma'anshan,Anhui 243002,China 2) Manufacturing Dep rtment,Ma'anshan Iron and Steel Co.Ltd.,Ma'anshan,Anhui 243000,China ☒Correspo g autho nail:LONG Hongming,yaflhm@126.com Abstract Reducing the consumption of bentonite is one of the effective ways to improve the grade of pellets and realize energy saving and emission reduction.Based on the new high-efficiency composite binder,the effect of composite binder on the quality of green pellets and the structure-activity relationship with important indexes were studied by means of green pellets preparation,linear fitting analysis and green pellet mechanical characteristics analysis,and the mechanism of the composite binder to improve the green pellets quality was expounded.The results show that the composite binder pellet with a ratio of 1.2%bentonite and 0.028%organic binder has a drop number of 6.2 times(0.5m),green crushing strength of 14.5 N.p,and shock temperature of 542C.Compared with the pellet with 2.0%bentonite,the mass of green pellets is similar,but the bentonite consumption is reduced by 40%.Based on the analysis of structure-activity relationship,the organic binder has a significant effect on the工程科学学报 DOI: 新型复合粘结剂提高生球质量的作用机理及 构效关系研究 雷 杰 1)，汪名赫 1)，周江虹 2)，孙社生 2)，龙红明 1)  1) 安徽工业大学冶金工程学院，安徽 马鞍山 243032 2) 马鞍山钢铁股份有限公司制造部，安徽 马鞍山 243000  通信作者，E-mail: 龙红明，yaflhm@126.com 摘 要 降低膨润土用量是提高球团品位、实现节能减排的有效途径之一。基于新型高效复合粘结剂，通 过生球制备、线性拟合分析、生球力学特征分析等手段研究了复合粘结剂对生球质量的影响规律及与重要 指标的构效关系，阐明了复合粘结剂提高生球质量的作用机理。结果表明：配比为 1.2%膨润土+0.028%有 机粘结剂的复合粘结剂球团，落下强度达到 6.2 次·(0.5m)-1、抗压强度达到 14.5 N·P-1、爆裂温度达到 542℃，与 2.0%膨润土球团相比，生球质量相近，但膨润土消耗减少 40%；基于构效关系分析，有机粘结 剂对生球落下强度、爆裂温度作用显著，膨润土对干球强度影响更大；有机粘结剂通过增强颗粒的亲水性、 毛细力和黏性力强化了生球落下强度，干燥时在表层形成少量孔隙，有利于球团内水分的排出，提高了生 球爆裂温度，干燥后以固态连接桥的形式强化干球强度，但是孔隙的位点和尺寸可能会降低干球强度，因 此，对干球强度起决定性作用的是膨润土，有机粘结剂对干球强度的影响呈现多面性。 关键词 球团；复合粘结剂；生球质量；作用机理；构效关系 分类号 TF521.6 Research on the mechanism and structure-activity relationship of new composite binder to improve the quality of green pellets LEI Jie1), WANG Minghe1), ZHOU Jianghong2), SUN Shesheng2), LONG Hongming1)  1) School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, China; 2) Manufacturing Department, Ma’anshan Iron and Steel Co. Ltd., Ma’anshan, Anhui 243000 , China  Corresponding author, E-mail: LONG Hongming, yaflhm@126.com Abstract Reducing the consumption of bentonite is one of the effective ways to improve the grade of pellets and realize energy saving and emission reduction. Based on the new high-efficiency composite binder, the effect of composite binder on the quality of green pellets and the structure-activity relationship with important indexes were studied by means of green pellets preparation, linear fitting analysis and green pellet mechanical characteristics analysis, and the mechanism of the composite binder to improve the green pellets quality was expounded. The results show that the composite binder pellet with a ratio of 1.2% bentonite and 0.028% organic binder has a drop number of 6.2 times ·(0.5m)-1, green crushing strength of 14.5 N· p-1, and shock temperature of 542 . Compared ℃ with the pellet with 2.0% bentonite, the mass of green pellets is similar, but the bentonite consumption is reduced by 40%. Based on the analysis of structure-activity relationship, the organic binder has a significant effect on the 《工程科学学报》录用稿，https://doi.org/10.13374/j.issn2095-9389.2021.06.30.003 ©北京科技大学 2020 录用稿件，非最终出版稿