摘要
以氯化法钛白粉生产过程中的副产物废盐酸和氯化尾气吸收液、工业氢氧化铝和七水硫酸亚铁为原料,在双氧水催化氧化条件下,制备得到一系列新型无机高分子混凝剂聚合氯化硫酸铝铁(PAFCS),其外观为红褐色透明液体,体积密度1.39~1.43 g/cm^(3),全铁与三氧化二铝(TFe+Al_(2)O_(3))总含量≥10.5%,可以用作水处理用混凝剂。与市售混凝剂相比,制备所得聚氯化硫酸铝铁对高化学需氧量(COD)的垃圾渗滤液生化尾水有较好的处理效果,COD去除率达到68.51%,优于传统混凝剂聚合硫酸铁。高效聚合氯化硫酸铝铁的制备为我国氯化法钛白粉生产工艺中副产物的资源化利用提供了解决思路和可行方法。
In this paper,a series of new inorganic polymer coagulants(Polymeric Aluminum Ferric Chloride Sulfate,PAFCS)were prepared by using waste hydrochloric acid and chlorinated tail gas absorbing liquid from by-products of the production of titanium dioxide,in combination with industrial aluminum hydroxide and ferrous sulfate heptahydrate,under the conditions of hydrogen peroxide catalytic oxidation.The appearance of the prepared PAFCS was a reddish-brown transparent liquid with a density of 1.39 to 1.43 g/cm^(3),and the total content of iron and alumina(TFe+Al_(2)O_(3))was≥10.5%,which could be used as coagulant for water treatment.The PAFCS prepared in this paper were used to treat landfill leachate biochemical tail water,in which the removal rate of COD reached 68.51%,which was superior to the traditional coagulant polymeric ferric sulfate(PFS).At the same time,this work provides ideas for solving the problem of resource utilization and clean production of by-products in the production process of titanium dioxide by chlorination method in China.
作者
董林辉
喻经纶
范浩
朱文渊
李风亭
伏振宇
Dong Linhui;Yu Jinglun;Fan Hao;Zhu Wenyuan;Li Fengting;Fu Zhenyu(Shenzhen Changlong Technology Co.,Ltd.,Shenzhen 518116,Guangdong,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)
出处
《钢铁钒钛》
CAS
北大核心
2021年第3期99-104,共6页
Iron Steel Vanadium Titanium
基金
深圳市重大技术攻关项目(重20170491)。
关键词
氯化法钛白粉
废盐酸
尾气
资源化利用
混凝剂
聚氯化硫酸铝铁
COD
去除率
chlorinated titanium dioxide
waste hydrochloric acid
chlorinated tail gas
resource utilization
coagulant
polymeric aluminum ferric chloride sulfate
COD
removal rate
