煅烧温度对水泥熟料矿物相含量及形貌影响的Rietveld法研究

Influence of Calcination Temperature on Mineral Phase Content and Morphology of Cement Clinker by Rietveld Method

为了探究煅烧温度对水泥熟料矿物相的影响,采用XRD分析法、Rietveld法以及岩相法,对不同煅烧温度下得到的熟料矿物相进行定性、定量以及形貌分析。研究结果表明:采用Rietveld法可快速、准确测得熟料中各矿物相的相对含量;通过Rietveld法计算得到的矿物相含量可明显看出,煅烧温度对熟料中各矿物相的含量有直接影响,其中对C3 S和C2 S含量的影响最为明显;Rietveld法与鲍格算法得到的矿物相含量结果接近,但拟合得到的C3 A含量会偏低,这是由于熟料的急冷使得C3 A以玻璃相形式存在;煅烧温度升高,晶体成核和发育更加完善,熟料能呈现更好的形貌。

In order to explore the influence of calcination temperature on the mineral phase of cement clinker,the clinker was analyzed qualitatively,quantitatively and morphologically by XRD,Rietveld and lithofacies method.The results show that Rietveld method can be used to measure the relative content of each mineral phase in the clinker quickly and accurately.According to the content of mineral phase calculated by Rietveld method,it can be seen that calcination temperature has a direct effect on the content of mineral phase in the clinker,especialy C3 S and C2 S.The results of mineral phase content obtained by Rietveld method are close to those obtained by Bague algorithm,but the content of C3 A obtained by fitting is lower.This is due to the rapid cooling of clinker which makes C3 A exist as glass phase.With the increase of calcination temperature,the crystal nucleation and development are more perfect,and the clinker shows better morphology.