w(TiO2)对高铬型钒钛磁铁矿烧结矿冶金性能的影响

以高铬型钒钛磁铁矿和普通磁铁矿精矿混合料为原料,通过烧结杯试验考察了TiO₂质量分数对高铬型钒钛磁铁矿烧结矿性能的影响规律.研究结果表明:随着TiO₂质量分数从6.30%增加到11.76%,转鼓指数逐渐降低,烧结矿强度降低,垂直烧结速度、成品率和烧结杯利用系数均呈现上升的趋势;直径小于5mm的小粒径烧结矿的比例逐渐降低,粒度有增大的趋势;随着TiO₂质量分数的增加,赤铁矿含量降低,磁铁矿含量增加,同时,钙钛矿和Fe₉TiO₁₅相也增加.低温还原粉化指数有上升的趋势,相反还原性降低.

Effect of TiO2 Content on Metallurgy Performance of High-Chromium Vanadium-Titanium Magnetite Sinter

High-chromium vanadium-titanium magnetite (HCVTM) and ordinary magnetite are used as raw materials to explore the influence of TiO₂ content on the properties of HCVTM sinter by sintering cup test.The results show that as the TiO₂ content increases from 6.30% to 11.76%, the tumbler index and sinter strength decrease while the vertical sintering speed,yield, and sintering utilization coefficient show the increasing tendency.The proportion of the tiny sinter particles with a diamater less than 5mm decreases gradually and the overall sinter size increases.With the increase of the TiO₂ content, the hematite decreases, and the magnetite, CaTiO₃ and Fe₉TiO₁₅ increase.The low temperature reduction degradation index shows an increasing tendency, while the reducibility decreases with the increase of TiO₂ content.