摘要
研究了不锈钢酸洗废液经除杂、蒸发浓缩、冷却结晶、高温焙烧的工艺,成功制得FeCl_(2)产品。其除杂最佳条件是:还原铁粉添加量1.1eq,p H3.5,结晶最佳温度是30℃;焙烧最佳条件是:草酸添加量为2%,焙烧温度250℃,焙烧时间2 h,在N_(2)气氛炉下焙烧即可得到纯度≥99%的FeCl_(2)产品,实现了酸洗废液资源化再生利用。
Anhydrous Iron(II)chloride product was successfully prepared from stainless steel pickling waste liquor through impurity removal,evaporation concentration,cooling crystallization and high temperature calcination.The optimal conditions for impurity removal are the 1.2eq addition amount of reduced iron powder and the 3.5 pH;The optimal crystallization temperature is 30℃;and the anhydrous Iron(II)chloride product with purity≥99%can be obtained by calcining in the furnace at the 250℃for 2 h under N2 atmosphere,with the 2%addition of oxalic acid,and realized the resource recycling and utilization of acid pickling wastewate.
作者
邓炳林
陈金泉
宋德生
肖晋宜
DENG Binglin;CHEN Jinquan;SONG Desheng;Xiao Jinyi(R Environmental Technology Co.,Ltd.,Huizhou 516200,China)
出处
《再生资源与循环经济》
2024年第1期44-47,共4页
Recyclable Resources and Circular Economy
关键词
酸洗废液
资源化
焙烧
氯化亚铁
ferric chloride etching solution
resource utilization
electrolytic copper
etching waste liquid
