铝灰替代部分高铝矾土制备铝酸盐水泥熟料的研究

Utilizing aluminum slag ash partially replacing of high grade bauxite to prepare aluminate cement clinker

铝灰是铝和铝制品加工工业排放的固体废物,有效铝成分(铝单质和氧化铝)含量高,具有替代高铝矾土的潜力。本研究以铝灰部分替代高铝矾土配制了铝酸盐水泥生料,利用同步热分析(TG-DSC)确定了生料的煅烧制度;利用X射线衍射(XRD)等方法研究了铝灰的替代掺入对所制备铝酸盐水泥熟料矿物组成的影响;此外,对所制备铝酸盐水泥的物理力学性能进行了分析。研究结果表明,铝灰可以部分替代高铝矾土制备铝酸盐水泥熟料,所制得的铝酸盐水泥熟料经磨细制备的铝酸盐水泥满足GB/T 201—2015《铝酸盐水泥》CA50级铝酸盐水泥要求,不仅降低了铝酸盐水泥的生产成本,还实现了资源综合利用。

There was high content of aluminum in aluminum slag ash discharged from aluminum industry and aluminum product processing industry, which could be used to replace some of bauxite. In this study, aluminate cement clinker was prepared by using aluminum slag ash partially replacing of high grade bauxite. Calcination temperature of raw meal were confirmed by TG-DSC, and the effect of aluminum slag ash on mineral composition of aluminate cement clinker were measured by XRD. Physical and mechanical properties of the prepared aluminate cement were tested. The results showed that aluminum slag ash could partly replace high bauxite to produce aluminate cement clinker, the prepared clinker and the cement could meet the CA50 grade aluminate cement according to Chinese standard of GB/T 201-2015. It not only reduces the production cost of aluminate cement, but also realizes the comprehensive utilization of resources.