碱度对高铬型钒钛矿烧结过程的影响

针对某钢铁厂高铬型钒钛烧结矿适宜碱度的确定问题,利用烧结杯试验,在新的配矿条件下分别对高铬型钒钛磁铁烧结矿的生产指标、烧结矿强度以及烧结矿荷重软熔性能在不同碱度下进行了研究.结果表明:随着高铬型钒钛烧结矿碱度由1.5增加到2.3,烧结成品率、抗磨指数下降,垂直烧结速度、利用系数、转鼓强度均有提高;烧结矿的还原粉化指数RDI-0.5和RDI-3.15指标降低,而RDI+6.3提高;软熔带下移,软熔区间变窄,透气性提高,对于高炉顺行有积极的意义.通过分析不同碱度下烧结矿的各项指标,指出高铬型钒钛烧结矿碱度控制在1.9~2.0比较适宜.

Effect of basicity in high chromium vanadium-titanium magnetite on sintering process

In order to explore the suitable basicity of high chromium vanadium-titanium magnetite in a facto-ry, the influence of different basicity in high chromium vanadium-titanium magnetite on production index 、sinter strength and the load softing property is studied by sintering pot test. The results show that the sintering yield、abrasion index、RDI-0.5and RDI-3.15 are decreased, while the vertical sintering speed、utilization coefficient、tumbler strength and RDI＋6.3are increased with the increasing of sintering basicity. These is positive sig-nificance for blast furnace own to the shifting down of soft melting zone,the turning narrow of soft melting and the permeability increasing. Analyzing all the indexing in the different basicity, the sinter basicity is more appropriate at 1.9～2.0.