【摘要】 萃取－焙烧法是一种处理冷轧盐酸酸洗废酸的新方法。首先用磷盐三丁酯将游离盐酸与 ＦｅＣｌ２萃取分离，得到的盐酸返回酸洗线复用， ＦｅＣＩ２可制成 ＦｅＣ２ｌ·２Ｈ２Ｏ粉料焙烧再生盐酸，也可以进一步加工得到其它化工产品．实现冷轧废酸资源的综合利用。这一工艺过程较高温焙烧法投资低，便于操作和控制，安全性好，适应性强且材料问题易于解决，并可生产高质量的氧化铁，特别适合于中小型冷轧厂的废酸处理。更多还原

【Abstract】 The extraction-roasting process is a new technology for treatment of hydrochloric acid pickle liquor for cold rolled sheet steel.At first, free HCI will be separated from FeCI2 solution with TBP extraction, then the HCI obtained from stripping is recycled to pickling bath. The FeCL2 solution is processed to FeCL2·2H2O powder for roasting and regenerated to HCI, or alternatively, FeCl2 can be processed to other products for reuse in various areas. Compared with Ruthner and Lurgi process, the extraction-roasting process has the following advantages: low investment, easy operation and controlling as well as safety and flexibility. The corrosionresisting materials would be tackled easily and high quality ferrite might be produced. The technology will be especially fit for medium sized or small cold rolled sheet steel plant.更多还原