碱度和MgO质量分数对球团抗压强度的影响  

Effects of basicity and MgO mass fraction on compression strength of pellets

作　　者：杨福[1,2] YANG Fu(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081

出　　处：《中国冶金》2020年第6期19-23,共5页China Metallurgy

基　　金：湖北省教育厅科学研究计划指导性资助项目(B2017002)。

摘　　要：为研究含镁熔剂性球团的抗压强度,在实验室条件下,研究了焙烧时间、球团矿碱度和MgO质量分数对球团矿抗压强度的影响。试验研究结果表明,膨润土质量分数保持2.0%不变时,含镁熔剂性球团矿碱度(R)为0.80~1.00、MgO质量分数为1.60%~1.80%,焙烧时间为25 min,球团矿的黏结相以Fe3O4氧化为Fe2O3、然后Fe2O3再结晶为主。另外,还有少量的铁酸镁、铁酸钙相,这种球团矿的抗压强度大于2500 N/个。当含镁熔剂性球团的矿碱度大于1.00,同时,MgO质量分数小于1.60%时,球团矿的黏结相含有大量的玻璃体硅酸盐,使球团矿的抗压强度大大降低。In order to research the compression strength of magnesium-containing fluxed pellets,the effect of roasting time,basicity of pellets and MgO mass fraction on the strength of pellets were investigated under laboratory conditions.The results show that when the mass fraction of bentonite remains unchanged at 2.0%,the basicity of magnesium-containing fluxed pellets is 0.80-1.00,the MgO mass fraction is 1.60%-1.80%,and the roasting time is 25 min,the bonding phase of pellets is mainly composed of the recrystallization Fe2O3,which is the oxidation product of Fe3O4.In addition,there is a small amount of magnesium ferrite and calcium ferrite.Pellets with the compressive strength greater than 2500 N/p can be obtained.When the basicity of magnesium-containing fluxed pellets is larger than 1.00,at the same time,the MgO mass fraction is less than 1.60%,a large amount of glassiness silicate is produced in the binding phase of pellets,which greatly reduces the compressive strength of pellets.

关 键 词：含镁熔剂性球团 碱度 MgO质量分数 抗压强度 

分 类 号：TF046.6[冶金工程—冶金物理化学]