褐铁矿对钒钛磁铁矿烧结性能的影响

来源期刊：钢铁2010年第12期

论文作者：何木光

文章页码：21 - 25

关键词：均匀设计； 褐铁矿； 烧结试验； 对比试验； 验证试验； 矿物组成

Key words：uniform design； limonite； sintering test； comparison test； verification test； mineral composition

摘    要：由于褐铁矿烧结影响因素多,烧结性能差,技术经济指标恶化。考察了褐铁矿配比、料层、水分、燃料配比4个关键因素,运用混合水平均匀设计法,试验次数少代表性强。采用"6水平3因素+4水平1因素"仅试验12次,通过对试验结果直观择优与建模寻优,找出了4个参数的最优组合,对指导现实生产具有重要意义。使用褐铁矿后烧结矿强度与利用系数下降,固体燃耗上升,矿物组成变好,软熔性能变差,低温还原粉化性恶化,但还原性改善。采用均匀设计方法进行方案设计,通过实验室试验、回归分析和模型寻优,确定出褐铁矿对钒钛磁铁矿烧结性能影响的最佳组合。中褐粉综合评价最优组合参数为:配比6.02%,焦粉配比5.14%,水分7.07%,料层592 mm。

Abstract: The technique economic indexes for sintering process using limonite become worse owing to bad sintering properties of limonite.Such 4 key factors as limonite proportion,bed depth,water content and fuel ratio were investigated through the mix level uniform design with the characters of fewness experiment times and strong representative.The optimum value of the above 4 parameters was found out by intuitive and modeling optimizing of experimental results,which will have important guiding role to the practical production.Sinter using the limonite can attain the following effects,such as lower sinter strength and utilization coefficient,higher solid fuel consumption,better mineral compositions,worse softening and melting properties and reduction degradation index(RDI),and better reducibility index(RI).The optimal proportion of limonite and vanadium-titanium magnetite was ascertained through the uniform design,sintering tests,regression analysis and model optimization.The optimal sintering parameters using medium grade limonite are as follows,6.02% of proportion in mixture,5.14% coke ratio,7.07% for water content and 592 mm bed depth.