Patent ID: 8042691
Filing Date: 2011-10-25
Classification: B03B

Abstract:
1. A method of separating heavy particles from light particles comprising: dropping particles onto a transversely operated belt that is moved in a direction transverse to the direction of movement of particulate material; accumulating a first group of particles having substantially medium to low density; concentrating a second group of particles having substantially medium to high density, concentrating comprising: providing a variably adjustable concave profile in the belt, the concave profile being progressively adjustable from a first position wherein the belt is in a fully lowered cross-sectional configuration to a second position wherein the belt is in a fully raised cross-sectional configuration and to positions intermediate between the first position and the second position; and subjecting the first and second groups of particles to separation in the concave area, each in an opposite direction; and discharging each of the groups at an opposite end of the belt.