含碱金属氧化物聚渣剂对镁系脱硫渣性能的影响  

Influence of Alkali Metal Oxide Slag Aggregating Agent on the Performance of Magnesium Desulfurization Slags

作　　者：蒋武锋 田亮 郝素菊 薄荷 马腾飞 张玉柱 JIANG Wufeng;TIAN Liang;HAO Suju;BO He;MA Tengfei;ZHANG Yuzhu(School of Metallurgy and Energy,North China University of Science and Technology,Ministry of Education Key Laboratory of Modern Metallurgy Technology,Tangshan 063210,Hebei,China;Department of Materials Engineering,Tangshan Vocational College of Science and Technology,Tangshan 063001,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,现代冶金技术教育部重点实验室,河北唐山063210 [2]唐山科技职业技术学院材料工程系,河北唐山063001

出　　处：《矿产综合利用》2024年第6期33-39,共7页Multipurpose Utilization of Mineral Resources

基　　金：河北省自然科学基金(E2018209323、E2022209125)。

摘　　要：这是一篇冶金工程领域的论文。针对镁系脱硫剂脱硫过程中渣层稀薄很难扒除干净,致使高浓度脱硫渣带入转炉,引起转炉回硫问题。利用FactSage软件绘制了CaO-SiO_(2)-Al_(2)O_(3)-MgO(FeO)脱硫渣的液相线图,分析了脱硫渣相组成及脱硫渣成分对液相区的影响,降低脱硫渣对温度的敏感度,有利于扒渣的进行。设计了主要成分为SiO_(2)的聚渣剂,对脱硫渣进行性能调控。利用熔点熔速仪测定了脱硫渣的开始熔化温度、半球点温度和流动性温度,研究了聚渣剂添加量对脱硫渣熔化性能的影响。结果表明,脱硫渣与聚渣剂配比为5∶2~5∶5时,可增大脱硫渣的开始熔化温度和流动性温度之间的温度差,提高脱硫渣的热稳定性。酸性脱硫渣加入聚渣剂的配比取低值,脱硫渣碱度提高可以适当增加聚渣剂配比。This is an article in the field of metallurgical engineering.In view of the thin slag layer in the desulfurization process of magnesium-based desulfurizers,it is difficult to remove cleanly,resulting in highconcentration desulfurization slag being brought into the converter,causing the problem of sulfur back in the converter.The liquidus diagram of CaO-SiO_(2)-Al_(2)O_(3)-MgO(FeO)desulfurization slag was drawn by FactSage software,and the phase composition of desulfurization slag and the influence of desulfurization slag composition on the liquid phase area were analyzed,and the sensitivity of desulfurization slag to temperature was reduced,which is conducive to slag removal.A slag aggregation agent whose main component is SiO_(2) was designed to control the performance of desulfurization slag.The initial melting temperature,hemispherical point temperature and fluidity temperature of the desulfurization slag were measured by a melting point melt rate meter,and the effect of the addition amount of slag aggregation agent on the melting performance of the desulfurization slag was studied.The results show that when the ratio of desulfurization slag to slag aggregation agent is 5∶2~5∶5,the temperature difference between the initial melting temperature and the fluidity temperature of the desulfurization slag can be increased,and the thermal stability of the desulfurized slag can be improved.The ratio of acid desulfurization slag added to the slag aggregate agent should be low,and the desulfurization slag basicity can be increased appropriately to increase the slag aggregate agent ratio.

关 键 词：冶金工程 FactSage 熔化性能 脱硫渣 聚渣剂 

分 类 号：TD981[矿业工程—选矿] TF703[冶金工程—钢铁冶金]