Reflotation concentration of sylvite

Claim 2

IN A CONTINUOUS FROTH FLOTATION PROCESS FOR THE CON

Claim 3

IN A CONTINUOUS FROTH FLOTATION PROCESS FOR THE CONCENTRATION OF THE SYLVITE CONTENT OF SYLVINITE ORE, IN WHICH A DESLIMED PULP OF SUCH ORRE IS SUBJECTED TO A ROUGHER FLOTATION STEP UTILIIZING A COLLECTOR REAGENT FOR SYLVITE, THE IMPROVEMENT WHICH COMPRISES SEPARATING SUBSTANTIALLY ALL THE FINE SYLVITE OF AOBUT MINUS 20 MESH SIZES OF THE DESLIMED PULP AS A FROTH CONCENTRATE IN THE ROUGHER FLOTATION STEP, SUBJECTING THE UNDERFLOW SOLIDS OF SAID FLOTATION STEP TO A SIZE SEPARATION STEP FOR SEGREGATION OF A FRACTION OF ABOUT PLUS 20 MESH SIZES, RECONDITIONING SAID PLUS 20 MESH FRACTION SO SEGREGATED WITH S SYLVITE COLLECTOR, SUBJECTING THE PULP SO CONDITIONED TO ANOTHER FLOTATION STEP, AND RECOVERING MOST OF THE COARSE SYLVITE CONTENT OF ABOUT PLUS 20 MESH SIZES IN THE ROUGHER FLOTATION UNDERFLOW AS A CONCENTRATE OF THE LATTER FLOTATION STEP.

Claim 4

IN A CONTINUOUS FROTH FLOTATION PROCESS FOR THE CONCENTRATION OF THE SYLVITE CONTENT OF SYLVINITE ORE, IN WHICH A DESLIMED PULP OF SUCH ORRE IS SUBJECTED TO A ROUGHER FLOTATION STEP UTILIIZING A COLLECTOR REAGENT FOR SYLVITE, THE IMPROVEMENT WHICH COMPRISES SEPARATING SUBSTANTIALLY ALL THE FINE SYLVITE OF AOBUT MINUS 20 MESH SIZES OF THE DESLIMED PULP AS A FROTH CONCENTRATE IN THE ROUGHER FLOTATION STEP, SUBJECTING THE UNDERFLOW SOLIDS OF SAID FLOTATION STEP TO A SIZE SEPARATION STEP FOR SEGREGATION OF A FRACTION OF ABOUT PLUS 20 MESH SIZES, RECONDITIONING SAID PLUS 20 MESH FRACTION SO SEGREGATED WITH S SYLVITE COLLECTOR, SUBJECTING THE PULP SO CONDITIONED TO ANOTHER FLOTATION STEP, AND RECOVERING MOST OF THE COARSE SYLVITE CONTENT OF ABOUT PLUS 20 MESH SIZES IN THE ROUGHER FLOTATION UNDERFLOW AS A CONCENTRATE OF THE LATTER FLOTATION STEP.