Abstract

Red mud is another worldwide problem after the bulk solid waste of steel slag.The reaction time between phases of aluminate cement clinker in the molten state is approximately 20 min, and the phase composition obtained is CA. After quenching, a large area of the glass phase appeared in the SEM images of the aluminate cement clinker. The compressive strength and flexural strength at 28 days reached 77.7 and 7.6 MPa, respectively, and the hydration strengths at 1, 3, and 28 days were higher than the strength standard of CA50II aluminate cement.Reconstruction of iron extraction tailings from red mud melting reduction is an effective technology to solve the problems of low cementitious activity, complex composition and large chemical fluctuation of red mud, and it has become an effective technology to improve the comprehensive utilization rate of red mud and promote energy savings and emission reduction.

中文翻译：

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调质高铁赤泥熔融还原渣制备铝酸盐水泥熟料胶凝性研究

摘要

赤泥是继钢渣大宗固体废弃物之后的又一世界性难题。铝酸盐水泥熟料在熔融状态下的相间反应时间约为20 min，得到的相组成为CA。淬火后，铝酸盐水泥熟料的 SEM 图像中出现大面积的玻璃相。28 d抗压强度和抗弯强度分别达到77.7和7.6 MPa，1、3和28 d水化强度均高于CA50II铝酸盐水泥的强度标准。赤泥熔融还原提铁尾矿改造是解决赤泥胶结活性低、成分复杂、化学波动大等问题的有效技术，