CYCLICAL PREPARATION METHOD FOR PRODUCING TITANIUM BORIDE AND POTASSIUM CRYOLITE SYNCHRONOUSLY BY USING POTASSIUM-BASED TITANIUM BORON VILLIAUMITE MIXTURE AS INTERMEDIATE RAW MATERIAL

摘要

Disclosed is a cyclical preparation method for producing titanium boride and potassium cryolite synchronously by using potassium-based titanium boron villiaumite mixture as an intermediate raw material, comprising the steps of: A) adding hydrofluoric acid to boric acid or boric anhydride, then adding potassium sulfate, and reacting to produce potassium fluoborate; adding hydrofluoric acid to titaniferous iron concentrate, then adding potassium sulfate, and reacting to produce potassium fluotitanate; B) mixing the potassium fluoborate with the potassium fluotitanate, and reacting with aluminum to produce titanium boride and potassium cryolite; C) extracting the potassium cryolite, and feeding the same together with the concentrated sulfuric acid into a rotary reaction vessel, reacting to produce hydrogen fluoride gas, potassium sulfate and potassium aluminum sulfate, collecting and dissolving the hydrogen fluoride gas in water to obtain hydrofluoric acid aqueous solution; and D) recycling the obtained hydrofluoric acid aqueous solution and potassium sulfate aqueous solution. The present invention can recycle the byproduct potassium cryolite, and simplify the preparation process flow of the titanium boride, thus reducing the preparation process condition and the overall production cost of the titanium boride, improving production efficiency and reducing environmental pollution.