METHOD OF PROCESSING PEROVSKITE CONCENTRATE WITH EXTRACTION OF NIOBIUM AND TANTALUM Russian patent published in 2010 - IPC C22B34/24 C22B3/16 

FIELD: metallurgy.

SUBSTANCE: method involves treatment of fine-grained concentrate by extracting agent - aliphatic alcohol saturated with hydrogen fluoride acid so that pulp is used. It is exposed and mixed with conversion of the main part of niobium and tantalum fluorides to organic phase, and titanium, calcium, lanthanides and the rest part of niobium and tantalum fluorides are concentrated in solid phase. Then pulp is clarified and extract is removed from solid phase. As extracting agent there used is pentanol or its mixture with octanol-1 or decanol at pentanol content in mixture of not less than 20% and at saturation of extracting agent with hydrogen fluoride acid till concentration is 119-184 g/l. Treatment of the concentrate with extracting agent is performed at the ratio S:L=1:7.5-10.

EFFECT: increasing the concentrate opening degree and degree of conversion of niobium to organic phase at providing high tantalum extraction degree.

2 cl, 8 ex