The ore was comminuted to an upper particle size of 1 mm in
the steps jaw crusher – gyratory crusher – cone crusher – pin mill
respectively. After grinding the ore was split into size fractions
(screen sizes 100/200/315/500/800/1000 lm). The separation of
the size fractions was done with a ring-type magnetic separator
at different field strengths. Due to the variation of field strength
four different concentrates and one tailing were obtained.