The results indicate that the carbide slag after proper calcination can be used to prepare the pure xonotlite which was made up of many big orbicular secondary particles.

• 结果表明，锻烧后的电石渣可以制备出纯度较高的，毛栗状球形“二次粒子”明显，且数量多直径大的硬硅钙石活性料浆。