ITMO University (Russia):

Chertov А. N., Ph. D. in Engineering Sciences, Senior Researcher, a.n.chertov@mail.ru
Gorbunova E. V., Ph. D. in Engineering Sciences, Senior Researcher, gorbunova@grv.ifmo.ru

Institute of Geology, Karelian Research Centre (KRC) of the Russian Academy of Sciences (RAS) (Russia):
Skamnitskaya L. S., Senior Researcher, skamnits@krc.karelia.ru
Bubnova Т. P., Researcher, bubnova@krc.karelia.ru

Possibilities of man-caused Karelian deposits rock mass material processing were studied, represented by the pit dumps of mica pegmatitic veins, mined since the beginning of the 20^th century. The results of the Plotina and Hetolambino deposits dumps mineral material studies with respect to processing by means of photometric sorting are presented. The purpose of the studies was to establish objective (measurable) differences in specimens of quartz, plagioclase, microcline, biotite and muscovite that may be used in development of regimes and sequences of mineral separation from initial rock mass. As a result of the analysis of the above mineral specimens’ color parameters by means of HLS color schemes, it was established, that microcline may be separated from the general mix by H channel (color); the pair «quartz and plagioclase» — by L channel (lightness); biotite and muscovite mixture may be separated on the basis of H and S channels (hue-saturation-intensity); quartz and plagioclase are indistinguishable from each other by color. A characteristic attribute is proposed for separation of quartz and plagioclase, based on their difference in degree of translucency, as well as in inner and surface structures. On the basis of the conducted studies, a threestage flow sheet was developed for separation of minerals from man-caused dumps of the North Karelian mica and ceramic pegmatites. The consolidated feasibility analysis showed a high effectiveness of the proposed technology.

The work was performed with the partial state financial aid to the leading universities of the Russian Federation (the Government Order, Project No. 2014/190).

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