NITRIC-ACID AND HYDRO-FLUORIDE PEROFSKITE PROCESSING TECHNOLOGY

摘要

The new low-wasted perofskite processing technology providing titanium extraction and accompanying extraction of niobium, tantalum and rare earth elements, is developed. Preliminarily perofskite is processing with nitric acid, with transition of calcium, rare earth elements and other impurities in solution. The reminder of hydrated oxides of titanium and rare metals is solving in fluorine acid, then niobium and tantalum are extracting, and fluorine-titanium raffinate is subjected to pyrolysis with fabrication of commercial titanium dioxide and practically complete HF regeneration. The results of investigations are presented, and they confirmed efficiency of the proposed technology.