钢铁厂高硬低碱废水循环回用技术研究

Research on the recycling technique of high-hardness and low-alkalinity wastewater drained from iron and steel works

根据钢铁厂外排水质高硬度低碱度的特征,采用石灰-纯碱和复配型絮凝剂的化学沉淀方法对该种废水进行处理,达到了钢铁厂废水循环回用的水质和成本要求。通过静态和动态试验确定了合理的组合处理工艺及条件。

According to the high-hardness and low-alkalinity characteristics of the wastewater drained from iron and steel works, the treatment by lime-sodium carbonate and composite coagulant chemical precipitation method has been studied. Laboratory test shows that after treatment the wastewater will completely meet the requirement of recycling and the cost is under control. A suitable combination process and its condition are investigated by static and dynamic experiments.