粗颗粒钢渣与生料高温煅烧生产水泥熟料实验研究

Study on the Production of Clinker Via Calcination of Coarse Steel Slag and Cement Raw Materials

将粒径为1～3mm粗颗粒钢渣与水泥生料混合煅烧，对所得熟料进行了Ⅺ王D、SEM等分析，研究了粗颗粒钢渣和水泥生料在不同温度煅烧后钢渣自身矿物种类和形貌改变以及所得熟料性能。结果表明，钢渣在1350℃或1450℃高温煅烧后，XRD图谱中RO相特征峰位置发生变化，表明以FeO为主要基体的RID相转变为以MgO为基体的R0相，RO相中Mg与Fe比例由1：1．5上升至9．6：1。粗颗粒钢渣和生料经1450℃高温煅烧，能够烧制出质量较好的熟料。高温作用下，钢渣与生料在界面处发生了化学反应，生料中钙相与钢渣中铁铝相生成了以Fe、Al、Ca为主要元素的片状或团状中间相矿物，结合X射线衍射分析可判断该过渡区域矿物为C4AF矿物，且当煅烧温度由1350℃上升至1450℃后，过渡反应区矿物中Fe、Al相比例明显增加，钢渣的参与程度提高。

The coarse steel slag with diameter of 1 - g mm and cement raw materials were mixed to calcine, which focus on mineral category and morphology of steel slag and interactions between coarse steel slag and cement raw materials after calcined in different temperature. XRD, SEM were used to study the properties of clinker, the results show that the mass ration of periclase decreased from 4.8 percent to 1.0 percent after calcined at 1350 ℃ or 1450 ℃ respectively. The XRD pattern shows that the position of characteristic peak of RO phase changed after calcined at high temperature, which indicated that the majority of chemical composition of RO phase transformed from FeO to MgO. The ration of Mg to Fe increased from 1 ： 1.5 to 9.6 ： 1. Mass or flack shape middle minerals were formed after interacted between coarse steel slag and cement raw materials under the condition of high temperature, combined with X-ray diffraction （XRD） analysis, it was found that the minerals of transition area were C4AF, and with increase of temperature, the ration of Fe and A1 phase increased at the transition area significantly, which reveals the level of involvement of steel slag improved with increasing of temperature.