Enriched titanium hydrochloric acid extract residue, use thereof and preparation method of titanium pigment

摘要

Titaniumrich hydrochloric acid leaching residue is provided, which belongs to the field of the preparation of titanium dioxide and relates to the titaniumrich hydrochloric acid leaching residue prepared by hydrochloric acid leaching ilmenite, its use and the method of preparing titanium dioxide concretely. Said leaching residue can be used as the raw material to prepare titanium dioxide by sulfuric acid process. The method for preparing titanium dioxide using titaniumrich hydrochloric acid leaching residue can effectively utilize the fine ilmenite in panxi area(the utilization rate is almost 100%), obtain the titanium solution with the ultralow ratio of iron to titanium and double the throughput of acidolysis equipment. The said method can simultaneously spare two steps of iron removal by freezing and titanium solution concentration with much energy consumption, reduce the times of washing metatitanic acid, thereby, the discharge of acid waste water is reduced and the production of FeSO