The paper presents the results of gravity separation of different types (Karelian-Kola region) of fine-sized mica ores. According to the technique, specific-sized concentrates are separated by both slot and hydraulic separators, and by other gravity separation equipment. The technique provides processing of non-economic muscovite ores and their dumps, of industrial types of vermiculite ores, as well as of phlogopite raw materials from the Kovdor deposit, mica recovery amounting to 60–70%.

1. Becker H. А. The effects of shape and Reynolds number on drag in the motion of freely oriented in infinite fluid. Canadian Journal of Chemical Engineering. 1959. Vol. 37. No. 2.
2. Pettyjohn E. S., Christiansen E. B. Effect of particle sphere on free selting rates of isometric particles. Chemical Engineering Progress. 1948. Vol. 44. No. 2.
3. Kizevalter B. V., Gershenkop A. Sh., Khokhulya M. S. Determination of free settling rate of laminar mineral particles. Obogashchenie Rud — Mineral processing. 1982. No. 3 (in Russian).
4. Antonychev N. Ya., Nagirnyak F. I. Analytical and experimental investigations of mineral grains behaviour water medium classification. Proceedings of Mekhanobr Institute. 1969. No. 15 (in Russian).