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针对重庆钢铁集团近年来增加澳矿使用量后,炉渣中Al2O3含量的增加对炉渣流动性的不利影响,对重钢高炉的炉渣性能进行了试验研究。以重钢高炉现场渣为基础,利用旋转黏度计测试了Al2O3质量分数为12%、Mg O质量分数为8%、Ti O2质量分数为5%、碱度为1.07~1.50时,Ca O-Si O2-Al2O3-Mg O-Ti O2渣系黏度变化情况;并测量了不同Ti O2含量时炉渣黏度变化情况。研究结果表明:在当前碱度范围内,随着二元碱度增加,炉渣黏度降低,当二元碱度超过1.35时,黏度降低趋势变平缓;炉渣中加入适量Ti O2能降低黏度,改善流动性。
In view of Chongqing Iron and Steel Group in recent years to increase the use of Australian mining, slag Al2O3 content increased the adverse impact on the flow of slag, the slag of the performance of the trial of heavy steel blast furnace. Based on the on-site slag in the blast furnace of Chongqing Iron and Steel Co., Ltd., the content of CaO-Si was 12%, the mass fraction of MgO was 8%, the mass fraction of Ti O2 was 5% and the alkalinity was 1.07 ~ 1.50. O2-Al2O3-Mg O-Ti O2 slag system viscosity changes; and measured the different Ti O2 content of slag viscosity changes. The results show that with the increase of binary alkalinity, the viscosity of slag decreases in the current alkalinity range. When the binary basicity exceeds 1.35, the trend of viscosity decrease becomes smooth. Adding appropriate amount of Ti O2 in the slag can reduce the viscosity and improve the flowability Sex.