摘要
改善高w(Al_2O_3)矿石冶炼的常用方法是增加烧结矿w(MgO),则高碱度烧结矿中w(MgO)和w(Al_2O_3)均升高且w(MgO)/w(Al_2O_3)改变。为降低冶炼成本,需合理调控高炉综合炉料的w(MgO)和w(Al_2O_3)。以现场烧结矿和天然块矿为试验原料,考察了烧结矿中w(MgO)和w(Al_2O_3)均增加的条件下混合炉料软熔性能的变化规律,结合相图和X射线衍射分析w(MgO)和w(Al_2O_3)的影响机制。结果表明,随着烧结矿中w(MgO)和w(Al_2O_3)增加,混合炉料软化特征温度降低;渣相熔化温度和黏度下降引起混合炉料的熔化特征温度降低,添加MgO能改善高Al_2O_3炉料的软熔性能,达到适宜的w(MgO)/w(Al_2O_3)即可。
The popular measure to improve the smelting of high w(Al2O3)ore in BF is adding w(MgO)into the sinter,and then both the w(MgO)and the w(Al2O3)in the sinter increase and the w(MgO)/w(Al2O3)ratio changes.To reach low smelting cost,it is of need to adjust w(MgO)and w(Al2O3)in burden reasonablely.Based on the actual production of sinters and the lump,the variation trends of softening-melting properties of mixed burdens under the conditions that both the w(MgO)and the w(Al2O3)were increased in the sinter.Combined with phase diagrams and X-ray diffractions,influencing mechanisms of the w(MgO)and the w(Al2O3)were analyzed.The results showed that,with the increasing of the w(MgO)and the w(Al2O3)in the sinter,the softening characteristic temperatures of mixed burdens tended to decrease;the reduction of the melting temperature and the viscosity of the slag phase caused the reduction of the melting characteristic temperatures of mixed burdens;adding w(MgO)to reach a proper w(MgO)/w(Al2O3)could improve the softening-melting properties of the high w(Al2O3)burden.
作者
李廷乐
孙长余
汪琦
LI Ting-le;SUN Chang-yu;WANG Qi(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China;Key Laboratory of Chemical Metallurgy of Liaoning Province,Anshan 114051,Liaoning,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第4期12-18,共7页
Iron and Steel
基金
国家自然科学基金煤炭联合基金资助项目(U1361212)
国家自然科学基金重点资助项目(51634004)
