'a screening media comprising binary mixture of spheres or beads'

摘要

The present invention relates to a method of splitting the feed in to differing size products, wherein feed can be coal, metallic, non-metallic, mineral ores or the like. According to the method, binary mixture of spheres or beads is prepared which is characterized by its size ratio and percentage of large spheres in the mixture. The obtained binary mixture is then placed in a container which is open at one end and closed by a perforated plate at other end, to hold the binary mixture. Slurry containing coal or ore particles of different size fractions is fed from the open end and the coarse particles are deposited on the top and along the height of the binary mixture and an oversize fraction is obtained. Fine particles pass through the bed of binary mixture and collected as underflow of undersized material. The invention also discloses an apparatus to carry out the method.