Potential for Improvement of Fluorite Concentrate Quality in Reprocessing of Manmade Materials
L. A. Kienko1, O. V. Voronova1, S. A. Kondrat'ev2
1Khabarovsk Federal Research Center, Far East Branch, Russian Academy of Sciences, Khabarovsk, Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Manmade materials, fine dissemination, fluorite, flotation, shielding coating, micaceous impurities, fine milling, electrolysis
Abstract
The authors discuss concentration of fluorite from waste at Yaroslavskaya Mining Company. The waste accumulated in the tailings storage for the long operating period contain 11.6-20.7% of fluorite. Old tailings have specific process properties because the initial ore has experienced certain physicochemical treatment during primary processing, and owing to long storage. The package of balanced effects which ensure selective recovery of fluorite is substantiated. The obtained concentrates contain up to 95% CaF2. Production of fluorite concentrates at maximal removal of silicon dioxide, which is a strictly restricted impurity, is discussed. The ways of improving the processing circuit are proposed, and the efficiency of electrochemical treatment of the pulp fluid phase at the final stages of recleaning is proved. It is found to be possible to reduce the silicon dioxide content of the concentrates to 1.25-0.99%.
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