利用电石渣制备硬硅钙石

利用动态水热合成工艺,首次采用电石渣作钙质原料合成了硬硅钙石。探讨了原料、电石渣处理方法和水热合成工艺参数等因素对合成硬硅钙石晶体结构和微观形貌的影响,并采用XRD和SEM对其结构和形貌进行了分析及表征。结果表明,煅烧后的电石渣可以制备出纯度较高且结晶良好的硬硅钙石;电石渣处理方法对合成硬硅钙石晶体及其二次粒子形貌有很大的影响;煅烧后的电石渣与分析纯CaO作钙质原料制备硬硅钙石的水热合成工艺参数基本一致。

Preparation of xonotlite from carbide slag

The technics of dynamic hydrothermal synthesis was used to prepare xonotlite by using carbide slag as the calcareous materials.The effects of influential factors including raw materials,pretreatment methods of carbide slag and process parameters of hydrothermal synthesis on the microstructure and morphology of xonotlite were explored,and the synthesized xonotlite was also researched by using XRD and SEM.The results indicated that carbide slag after proper calcination could be used to prepare the pure xonotlite,the different pretreatment methods of carbide slag posed big impact on the crystal and secondary particle morphology of xonotlite,and the process parameters of xonotlite synthesized by calcined carbide slag were almost the same as that by pure CaO.