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,密度1.38~1.45g/cm3,全铁与三氧化二铝（全Fe+Al2O3）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。

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

Study on Resource Utilization of By-products of Chloride Titanium Dioxide

Dong Linhui1, Yu Jinglun1, Fan Hao1, Zhu Wenyuan1, Li Fengting2,Fu Zhenyu1

(1.Shenzhen Changlong Technology Co.， Ltd.， Shenzhen 518116，Guangdong,China；2. College of

Environmental Science and Engineering， Tongji University， Shanghai 200092，China)

Abstract:

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 fromby-products of the production of titanium dioxide, with industrial aluminumhydroxide and ferrous sulfate heptahydrate, under the conditions of hydrogenperoxide catalytic oxidation. The appearance of the prepared PAFCS was areddish-brown transparent liquid with a density of 1.38 to 1.45 g/cm3, and the total content of iron and alumina (Fe + Al2O3) is≥10.5%,which can be used as coagulant for water treatment. The PAFCS prepared in thispaper were used to treat landfill leachate biochemical tail water, in which theremoval rate of COD reached 68.51%, which was superior to the traditionalcoagulant polymeric ferric sulfate (PFS).

At the same time, this paper provided ideas for solving the problem ofresource utilization and clean production of by-products in the production process of titaniumdioxide by chlorinationmethod in China.

Key words:

chlorinated titanium dioxide, waste hydrochloric acid,chlorinated tail gas, resource utilization, coagulant, polymeric aluminumferric chloride sulfate, COD ，removalrate

0 引言

钛白粉是一种具有卓越光学性质、分散性质和化学稳定性的白色颜料[1-2],广泛应用于生活和工业生产中,主要用途不仅包括颜料、涂料、光伏、传感器、造纸、牙膏和防晒霜,还包括陶瓷、食品、塑料、化纤、医药等方面[2]。随着我国经济的快速增长,钛白粉的消费量大幅度提升,特别是高端的金红石型钛白粉,市场潜力和价格优势很大[3-4]。工业上,钛白粉的生产方法主....