Technical Note

Physical separation (gravity and shape) of small-sized mica ore

A.Sh. Gershenkop* and M.S. Khokhulya

Mining Institute, Kola Science Centre, Russian Academy of Sciences, Apatity
24 Fersman str., 184200 Murmansk region, Russia

Received 9 January 2003; accepted 25 July 2004


To process small-sized mica contained in vein filling mined and in muscovite dumps a separation technology has been developed. The technology is based on gravity separation into shapes, with the behaviour of mica flakes, falling in a liquid under different hydrodynamic regimes, taken into account. The technology consists of separation into shapes, hydraulic separation and table separation. Being desintegrated in a rod mill, mica booklets get thinner and the sphericity coefficient decreases, resulting in separation indices upgrading. The technology enables to produce a concentrate with 95-100% mica content at recovery 60-66.7% from mica contained in small-sized ore.

Keywords: Gravity separation; mica, phlogopite, muscovite, grinding

* Corresponding author
   E-mail : alex@goi.kolasc.net.ru