PROCESS FOR BENEFICATION OF VARIOUS ORES AND PARTICULARLY FOR MAGNESITE ORE

摘要

Sepn. or concn. of magnesite from a comminuted raw material, contg. a magnesite and gangue mixt. The raw material is treated with reagents causing selective surface activation of magnesite or gangue mixt. and imparting different water-repellency to the magnesite- and gangue mixt. particles. Sepn. then takes place in an appts. generating a large water-air boundary surface zone, e.g. a vibrating table- or Humphrey's spiral concentrator. A (pre-)condensate can be obtd., depending on desired prod. quality. Reagent quantity needed for surface activation is smaller than reagent need in flotation. A coarse-grained material can be used in simple separating devices. Process can be used at any wt. ratio of gangue mixt. to useful fractions, giving high yields of concentrate.