“Uralmekhanobr” JSC, Ekaterinburg, Russia:
G. I. Gazaleeva, Deputy Chief Executive Officer on Science
A. A. Mushketov, Senior Researcher of Concentration Department
N. A. Sopina, Chief Dresser of Concentration Department
I. A. Vlasov, Researcher of Chemical and Analytical Laboratory, e-mail: www//umbr@umbr.ru

Institute of Metallurgy of Ural Department of Russian Academy of Sciences, Ekaterinburg, Russia:

S. A. Uporov, Leading Engineer of Laboratory of Statics and Kinetics of Metallurgical Processes

The present work represents research results of properties of monomineral fractions, extracted from red muds. Main fractions of a red mud are hematite, chamosite and calcite. These fractions were obtained by methods of beneficiation. Material composition and physical properties (signs) of monomineral fractions were defined such as specific magnetic susceptibility and a true density and also the contrast coefficient between separate fractions on each of physical signs was calculated. Maximum values of contrast coefficients 3.75 and 2.3 on a specific magnetic susceptibility respectively were received between hematite, calcite and chamosite. As first steps within a process flow sheet it enabled to predict a main and a cleaning high-gradient magnetic separation with the induction of the magnetic field 1.4-1.5 T, the values of which were obtained by studying dependence of a specific
magnetic moment of monomineral fractions of a given field induction. Further steps of the flow sheet (gravity) were predicted on basis of a following analysis of contrast coefficients of fractions and were checked with an use of a concentrating table and a Knelson separator. By results of research there was issued an optimum process flow sheet of the red mud with a receipt of iron concentrate with Fe content — 50%.

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