添加剂对含钛高炉渣黏度及钙钛矿相析出行为的影响  

Influence of Additive on Viscosity and Perovskite Precipitation of Titania Bearing Blast Furnace Slag

作　　者：朱二涛[1] 卢建光[2] 李福民[1] 吕庆[1] 郄亚娜 Zhu Ertao Lu Jianguang Li Fumin Lu Qing Qie Yana(School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China School of Materials ＆ Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China)

机构地区：[1]华北理工大学冶金与能源学院,教育部现代冶金技术重点实验室,河北唐山063009 [2]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《钢铁钒钛》2016年第6期91-98,共8页Iron Steel Vanadium Titanium

基　　金：北京科技大学钢铁冶金新技术国家重点实验室研究基金(KF13-02)资助

摘　　要：针对承钢含钛高炉渣黏度大、渣铁分离较差、硬度较高难磨等问题,开展了降低炉渣黏度和硬度的研究。结果表明:随着CaF2添加量的增加,炉渣黏度由1.632 Pa·s降到0.880 Pa·s;随着除尘灰添加量的增加,炉渣黏度先由1.632 Pa·s降到1.104 Pa·s,再由1.104 Pa·s升到1.296 Pa·s;随着煤粉灰添加量的增加,炉渣黏度先由1.632 Pa·s降到1.024 Pa·s,再由1.024 Pa·s升到1.664 Pa·s;含钛高炉渣水冷、急冷、缓冷三种冷却方式中,随着冷却速度的变慢,钙钛矿析出量成增加趋势;含钛高炉渣水冷状态下,原渣和添加2%煤粉灰,钙钛矿析出区域较少,添加CaF_2的炉渣钙钛矿析出区域较大;含钛高炉渣急冷状态下,随着CaF_2添加量增加,钙钛矿析出量呈现变多长大趋势,相反添加2%煤粉灰,钙钛矿析出量反而减少;含钛高炉渣缓冷状态下,随着CaF_2添加量增加,钙钛矿析出量呈现变多长大趋势,相反添加2%煤粉灰,较原渣而言钙钛矿析出量无明显变化。The vanadium titano-magnetite slag from Chengde iron ＆ steel company is characterized by high viscosity, difficult in separation of the slag-iron higher hardness. The study has been done to decrease the viscosity and hardness of the vanadium titano-magnetite slag. The results show that the viscosity decreases from 1. 632 Pa - s to 0. 880 Pa - s with the additive amount of CaF2 increasing. The viscosity first decreases from 1. 632 Pa . s to 1. 104 Pa - s and then increases from 1. 104 Pa - s to 1. 296 Pa - s with the additive amount of precipitator dust increasing. The viscosity first decreases from 1. 632 Pa . s to 1. 024 Pa . s and then increases from 1. 024 Pa . s to 1. 664 Pa . s with the additive amount of coal fly ash increasing. Among the three cooling strategies of water-cooling, quenching and slow cooling, the precipitated amount of perovskite increases with the rate of cooling decreasing. Under the water-cooling condition ,for both of original slag and with 2% coal fly ash , the precipitation area of perovskiteis small, but the precipitation area of perovskite in the slag with CaF2 addition is big. Under the quenching condition, the precipitated amount and the crystal size of perovskite increases with the additive amount of CaF2 increasing, while the precipitated amount of perovskite decreases with the addition of 2% coal fly ash. Under the slow cooling condition, the precipitated amount and the crystal size of perovskite increases with the additive amount of CaF2 increasing, while the precipitated amount of perovskite changes a little with the addition of 2% coal fly ash.

关 键 词：含钛高炉渣 钙钛矿 析出 CAF2 煤粉灰 黏度 冷却方式 

分 类 号：TF534[冶金工程—钢铁冶金] TF044