白云石替代蛇纹石的烧结配矿结构  

Blending Structure of Iron Ore for Dolomite Substitute Serpentine in Sintering Process

作　　者：陈绍国[1] 吴胜利[1] 张国良[1] 朱娟[1] 樊佳欣[1] 苏博[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2014年第5期24-29,共6页Iron and Steel

基　　金：中央高校基本科研业务费资助项目(FRF-MP-12-003B)

摘　　要：在铁矿粉SiO2含量不断升高的背景下,针对烧结面临高硅蛇纹石停配而产生的烧结矿产质量下降的技术问题,采用微型烧结装置和烧结杯对白云石替代蛇纹石后的适宜配矿结构进行了研究。微型烧结试验研究结果表明,在化学成分一定的条件下,白云石替代蛇纹石后,因烧结液相流动性的降低而黏结效果变差,致使烧结体固结强度明显下降。烧结杯试验研究结果表明,用高液相流动性铁矿粉替代低液相流动性铁矿粉后,烧结成品率和转鼓强度分别升高0.98%和2.26%,烧结利用系数提高9.71%,而采用大粒级铁矿粉以提高烧结混合料黏附粉偏析碱度的优化配矿措施,使烧结成品率和转鼓强度分别升高2.10%和3.37%,烧结利用系数提高8.25%。Under the background of rising SiO2 content in iron ore, to solve the technical problems that sinter yield and quality decreased with serpentine had stopped, suitable ore blending structure after dolomite used as substitution of serpentine was studied by use of micro sintering device and sinter pot. The micro sintering tests show that on the condition of the same chemical composition,after dolomite replaces serpentine,sintering liquid phase fluidity reduces and cohesive effect becomes poor, so sinter body consolidation strength falls obviously. The sinter pot tests show when iron ore with higher liquid phase fluidity instead of lower fluidity iron ore, yield and tumbler strength separately increase 0.98% and 2.26%, productivity raise 9.71% ,and when large grained iron ore are used in order to in- crease the sintering adhesive powder segregation basicity, yield and tumbler strength separately increase 2.10% and 3.37 %, productivity raise 8.25 %.

关 键 词：铁矿粉 烧结 蛇纹石 白云石 液相流动性 配矿结构 

分 类 号：TF046.4[冶金工程—冶金物理化学]