钛白副产硫酸亚铁制备氧化铁黑的研究

钛白生产中副产大量硫酸亚铁，且含有Ti,Mn等杂质。先别副产硫酸亚铁经净化处理，然后用氨水和空气进行反应生产氧化铁黑，产品质量达到国家标准。与传统工艺相比，生成成本低，减少了三废的排放。对合成氧化铁黑的影响因素也进行了试验研究，得出了较好的合成工艺条件。

The Preparation of Pigment of Iron Black Oxide from the Byproduct of Titanium DioxideFeSO4.H2O

During the production of titanium pigment, there is a large amount of byproductFeSO4* H2O which contains some impurities, such as Ti, Mn etc. A new technology of preparing iron black oxide from the ferrous sulfate septihydrate was proposed in this paper. The method consists of steps: first purifying the by product FeSO4* H2O, then adding ammonia to form ferrous hydroxide and finally oxidizing ferrous hydroxide into iron black oxide by air under the given conditions. Comparing with the traditional technology, both lower product cost and less waste byproduct were obtained by the method. Some factors affecting the preparing of iron black oxide were tested and the optimal conditions of oxidizing reaction were obtained.