METHOD OF PROCESSING TITANIUM- AND SILICON-CONTAINING CONCENTRATES

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FIELD : metallurgy of rare-earth metals; method of processing difficultly-stripped leucoxene concentrates of Yareg deposits.SUBSTANCE : proposed method includes grinding crude concentrate and separating titanium- and silicon-containing fractions for obtaining rich titanium-containing concentrate. Ground initial concentrate is classified according to class 0.2 mm; product at size +0.2 mm is subjected to regrinding at additional separation of -0.2 mm fraction; -0.2 mm fractions are combined and are subjected to wet separation in field at magnetic induction of up to 0.1 T for separation of iron-containing fraction. Non-magnetic fraction thus obtained is subjected to dehydration and titanium- and silicon-containing fractions are separated by rough floatation obtaining froth product enriched with leucoxene and chamber product enriched with quartz; chamber product is dehydrated, ground and is subjected to check floatation for obtaining froth product enriched with leucoxene; froth product of check floatation is combined with froth product of rough floatation and is subjected to cleaner floatation for obtaining rich titanium-containing concentrate in froth product; chamber products of cleaner floatation at obtaining additional intermediate titanium-containing. Floatation at all stages is performed in acid medium with mixture of primary and secondary amines.EFFECT : enhanced efficiency of separation of titanium- and silicon-containing concentrates; reduced power requirements; increased extraction of titanium-containing fractions.4 cl, 1 ex