从工业废料制取化学建材石膏的研究

研究了以造纸白泥、电石渣及工业废硫酸为原料化学建材石膏的原料二水石膏的工艺条件和影响因素，同时采用废水闭路循环回用工艺流程，防止二次污染的产生。实验表明，将废渣配成１０％浓度的浆液与低浓度废硫酸进行反应，控制一定的反应时间及终点ＰＨ值可制得含量达９０％以上的优质二水石膏。

Preparation of Chemical Building Plaster from Industrial Waste

The study focused on the chemical condition and influence factors of preparing chemical building plaster from paper making clay, carbide slag and waste sulfuric acid. Wastewater closed circulation and reused technological process were adopted to prevent secondary pollution. The result showed that if the waste slag compose of 10% fluid and react with low concentrated sulfuric acid, 90% dihydrate plaster would be prepared at end point pH after a certain reaction time.