Abstract:

Iron-containing acid pickle in steel works,aluminum-containing spent lye in aluminum processing industry and waste iron scraps have been used as raw materials for preparing polyferric aluminum chloride(PFAC).The influence of waste iron scraps dosage and other factors on Fe²⁺ dissolution rate is studies.The oxidation rate of Fe²⁺ is 98.7%,when the oxidation conditions are as follows: its temperature is 25 ℃,reaction time 15～20 min,and the dosage of sodium chlorate equals to stoichiometric value.Spent lye is used for adjusting the PFAC basicity to 20%.The A590 removing rate of the activated Blue P-3R aqueous solution can reach 99.8%;and the PFAC samples are characterized by infrared spectroscopy.

Key words: acid pickle in steel works, spent lye, iron scraps, polyferric aluminum chloride(PFAC), basicity

摘要：

以钢厂含铁废酸和铝加工业含铝废碱及废铁屑为原料制备聚合氯化铁铝(PFAC)。实验研究了废铁屑加入量等因素对Fe²⁺溶出率的影响,同时研究了Fe²⁺的氧化条件。结果表明,在25℃、反应时间为15～20 min、氧化剂氯酸钠加入量等于化学计量值时,Fe²⁺氧化率可达98.7%以上。用废碱液调整盐基度,PFAC盐基度为20%时,对活性蓝P-3R水溶液的A590去除率可达99.8%;并对PFAC样品进行了红外光谱表征。

关键词: 钢厂废酸, 废碱液, 废铁屑, 聚合氯化铁铝(PFAC), 盐基度

CLC Number: 

• X703