Method and apparatus for separating and recovering particulate material
AssigneeRyan Investments, B.V.
InventorFrancois J. Callut
Life of this patent
Estimating the term…
Abstract
Particulate material such as coal of a size inferior to 1 mm is recovered by being entrained in a liquid medium and being fed through an apparatus comprising a plurality of cyclone separators connected in series, the cyclone angle of the separators decreasing in the direction of flow. The cyclone angle .alpha..sub.2 of a cyclone separator in the series is within .+-.5% of the angle calculated according to the formula ##EQU1## where .alpha..sub.2 is the cyclone angle of a cyclone separator following a separator with angle .alpha..sub.1 and .phi..sub.1 and .phi..sub.2 represent the geometric mean particle size of the cut of successive separators with these angles.
Claims12
A method of separating and recovering particulate material which comprises providing a plurality of cyclone separators connected in series, the cyclone angle of the separators decreasing in the direction of flow and the cyclone angle .alpha..sub.2 of a cyclone separator in the series being .+-.5% of the angle calculated according to the formula ##EQU12## where .alpha..sub.2 is the cyclone angle of the cyclone separator following a separator with cyclone angle .alpha..sub.1, and .phi..sub.1 and .phi..sub.2 represent the geometric mean particle size of the cut of successive separators with these angles and feeding the material entrained in a liquid medium therethrough.
A method of recovering coal particles of a size less than 1 mm from waste material and R.O.M. which comprises providing a series of cyclone separator each having a cyclone angle selected progressively to separate to the underflow a range of progressively smaller particles and collecting the ranges of particles from the underflow of the separators and feeding the particles entrained in water through said separators.
Dependencies are inferred from the claim text.