用低硅铁尾矿制备贝利特水泥

摘要

Belite cement prepared by iron tailings from Hubei province was studied, the effects of the ratio of raw materials, the calcining temperature, the activator gypsum on the properties of cement clinker were also investigated. The results show that the belite cement with compression strength meet the requirements of PI42. 5R cement at the age of 3 and 28 d could be prepared in the optimum condition of 30. 90% iron tailings, 69. 10% limestone, and 0.60% activator gypsum equivalent the mass of clinker, calcining lh under 1 350 ℃. The result of XRD of clinker present the same main mineral with the conventional Portland cements, besides the more content of belite mineral.%以湖北某地铁尾矿为主要原料进行了制备贝利特水泥的研究,考察了原料配比、煅烧温度和活化剂石膏掺量对水泥熟料性能的影响.结果表明:以质量分数为30.90％的铁尾矿和69.10％的石灰石为原料,在1 350℃煅烧1h,再添加相当于熟料质量0.60％的活化剂石膏,制得的贝利特水泥3、28 d的强度指标达到了PI42.5R水泥的要求,且其主要矿物种类与传统硅酸盐水泥相一致,但贝利特矿物的含量明显超过传统的硅酸盐水泥.