Abstract:

A newchemical is prepared combiningly by CaCl₂ and MgSO₄. It is determined through experiments that the proper mass ratio of CaCl₂ and MgSO ₄is 1 ∶1. The optimum technical conditions of coal-washing wastewater treatment by using CaCl₂ and MgSO₄ combiningly are determined by the orthogonal experiment. The experimental results in laboratory are proved to be true by experiments in production. The coagulation mechanism of this chemical for treating coal-washing wastewater does not completely conform to DLVO theory. There are many factors affecting the results cooperatively.

Key words: coal-washing wastewater, calcium chloride, magnesium sulphate, combined chemicals

摘要：

用CaCl₂与MgSO₄复配出新的复合药剂，通过试验确定了适宜m(CaCl₂)∶m(MgSO₄)=11∶5。采用正交实验确定了钙镁复合药剂与PAM联用处理洗煤废水的最佳组合条件，并通过生产性试验验证了实验室的试验结果。分析认为钙镁复合药剂对洗煤废水的混凝机理并不完全符合DLVO理论，它是多方面因素共同作用的结果。

关键词: 洗煤废水, 氯化钙, 硫酸镁, 复配药剂

CLC Number: 

• X703.1

• X752