Patent ID: 7674032
Filing Date: 2010-03-09
Classification: G03G

Abstract:
1. An apparatus for surface treating particulate material with surface treatment particles, comprising: a substantially cylindrical body having a top, bottom and sidewall; a nozzle ring disposed within said body in sealing engagement with said top and said bottom, said nozzle ring being spaced apart from and substantially parallel with said sidewall to define an air flow chamber within said body and radially outward of said nozzle ring; a cylindrical mixing chamber defined within said body and radially inward of nozzle ring; a source of particulate material and a source of treatment particles; at least one injector inlet in communication with said mixing chamber and adapted to inject particulate material and surface treatment particles into said mixing chamber from said sources with a centrifugal flow component in a predetermined rotational direction within the mixing chamber; a source of process air; at least one process air inlet in communication with said source of process air and said air flow chamber; a nozzle through said nozzle ring fluidly connecting said air flow chamber and said mixing chamber such that air is caused to enter said mixing chamber from said air flow chamber at a non-radial inlet angle to promote and achieve air flow with a centrifugal flow component in the predetermined rotational direction; and at least one outlet in communication with said mixing chamber, wherein said outlet including an outlet orifice and an adjustable outlet mechanism in association with said outlet orifice, said outlet orifice including an inlet portion, said adjustable outlet mechanism and said inlet portion having surfaces configured for engaging each other to close said outlet orifice.