高Al_(2)O_(3)型高炉渣系脱硫速度及铁水残硫量预测  

Desulfurization rate of high Al_(2)O_(3) blast furnace slag and prediction of the residual amount in molten iron

作　　者：张保志 郑海燕 丁亚强 周先润 马腾飞 沈峰满 Zhang Baozhi;Zheng Haiyan;Ding Yaqiang;Zhou Xianrun;Ma Tengfei;Shen Fengman(School of Metallurgy,Northeastern University,Shenyang 110819,China;Wuhan Branch,SMS Group(Bejing)Co,Ltd,Wuhan 430000,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]西马克技术(北京)有限公司武汉分公司,武汉430000

出　　处：《材料与冶金学报》2023年第1期30-37,共8页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助(NSFC52074072,NSFC51774071,NSFC51974073)。

摘　　要：为了研究高Al_(2)O_(3)型高炉渣系的脱硫行为,依据1 500℃条件下的黏度测定试验和脱硫试验结果并结合拉曼光谱分析,探讨了高Al_(2)O_(3)型高炉渣系成分碱度、镁铝比、Al_(2)O_(3)含量对炉渣黏度、铁水残硫量和脱硫速度的影响及制约关系.研究结果表明:炉渣的脱硫速度与炉渣的黏度和成分均有关;随着炉渣黏度的增大,脱硫速度减慢;随着炉渣碱度和镁铝比的增加,SiO_(4)^(4-)和AlO_(4)^(5-)四面体结构发生解聚反应,炉渣结构简单化,表现为黏度降低、脱硫速度增加;随着Al_(2)O_(3)含量的增加,SiO_(4)^(4-)和AlO_(4)^(5-)四面体结构发生聚合反应,且炉渣中更易生成高熔点化合物(镁铝尖晶石),炉渣结构变复杂,表现为黏度增加、脱硫速度降低;确定了铁水残硫量与炉渣的成分和黏度之间的关系式,可较好地预测铁水残硫量.In order to study the desulfurization behavior of high Al_(2)O_(3)content blast furnace slag, this paper discusses the effects of the composition basicity, w(MgO)/w(Al_(2)O_(3)), the content of Al_(2)O_(3)of blast furnace slag with high Al_(2)O_(3)content on the slag viscosity, the amount of residual sulfur in the molten iron, and the desulfurization rate, and the internal relationship among them were discussed in this paper. The results indicate that the slag desulfurization rate is related to not only the viscosity of the slag, but also the composition of the slag;the desulfurization rate of the slag is negatively related to the viscosity of the slag, that is, the greater the viscosity of the slag, the slower the desulfurization rate;with the increase of basicity and w(MgO)/w(Al_(2)O_(3)) of the slag, SiO_(4)^(4-)and AlO_(4)^(5-)tetrahedral structures undergo depolymerization and the structure of slag is simplified, which shows that the viscosity decreases and the desulfurization speed increases;with the increase of Al_(2)O_(3)content, SiO_(4)^(4-)and AlO_(4)^(5-)tetrahedral structures undergo polymerization reaction, and the high melting point compound magnesia-aluminum spinel is more likely to be formed in the slag, which makes the slag structure more complex and the viscosity increases and the desulfurization speed decreases;the relationship between the residual sulfur content of molten iron and the composition and viscosity of the slag is determined, which can predict the residual sulfur content of molten iron with high accuracy.

关 键 词：高Al_(2)O_(3)型高炉渣 黏度 铁水残硫量 脱硫速度 拉曼光谱 

分 类 号：TF54[冶金工程—钢铁冶金]