用白云石生产氯氧镁水泥的新工艺

Research on Dolomite to Sorel Cement Production

以安徽凤阳白云石为原料,在实验室进行了煅烧、水化和强度试验,用正交试验法确定了白云石的最佳煅烧温度和保温时间,借助X射线衍射、扫描电镜、红外光谱、差热分析等测试手段,研究了白云石的分解和轻烧白云石的水化硬化过程,给出了白云石中MgCO3分解率的定义,依据测试结果提出了轻烧白云石的水化硬化机理。结果表明,轻烧白云石可代替菱苦土用于氯氧镁水泥制品的生产。

Experiments of calcination, hydration and strength development were conducted with dolomite yielded in Fengyang County,Anhui Province. The optimum calcination temperature and calcination time were determined by means of orthogonal experiment. The decomposition of dolomite, hydration and hardening process of properly calcinated dolomite were studied by using XRD, SEM, IR spectra and DTA. Based on the test results, the dolomite decomposition ratio was defined, the hydration and hardening mechanism of properly calcinated dolomite was discussed. It was shown that the properly calcinated dolomite could play the same role as calcinated magncite in Sorel cement production.