钢铁加工酸洗废液再生利用实验研究

Experimental Study of Recycling and Reuse of Steel Waste Pickling Liquor

利用高温喷射分离技术对钢铁酸洗废液进行铁盐分离和HCl的回收实验研究。在不同温度、热气液比和Fe2+/Fe3+含量的因素下,寻找酸洗废液中铁盐的最佳分离效率发生条件,并在该条件下对来自沈阳某精密钢制品有限公司酸洗废液进行实际分离处理,处理后Cl-(铁盐的形式)回收率可达86.81%,其余Cl-则以HCl形式收集并可回用于酸洗工艺,实现真正的零排放。

In this experimental study,high-temperature jet separation technology was used to separate iron salts and recover HCl from steel waste pickling liquor.At different temperatures,with different hot gas-liquor ratios and Fe2＋/Fe3＋ contents,occurring conditions for best separation efficiency of iron salts from steel waste pickling liquor were searched.Under such conditions,the steel waste pickling liquor from Bell Carter （Shenyang） Precision Steel Products Co.,Ltd.was separated.After the separation process,the recovery rate of Cl-reached to 86.81％ and other Cl-were reclaimed in the form of HCl and reused for pickling process,so zero discharge was achieved.