Patent ID: 6543710
Filing Date: 2003-04-08
Classification: B02C

Abstract:
Fluidized-bed opposed jet mill comprising:a grinding container for the holding material to be ground and having a top opening, a number of inward-directed opposed jet nozzles located in the lower part of the grinding container and oriented in such a manner that the jets meet at a common point for the grinding and fluidization of the material to be ground in the grinding container, a separating device located in the upper part of the grinding container having a separating wheel that rotates about a vertical axis and that functions based on the principle of centrifugal force for the separation of material that has been ground sufficiently fine, a discharge for finely ground material located above the separating wheel for the purpose of discharging the separated and sufficiently finely ground material from the grinding container, a bearing defining a closure located vertically above and operatively connected to drive the rotating separating wheel, a detachable connection detachably connecting the closure to the grinding container to close the top opening, an actuating unit operatively connected to drive the bearing, the separating wheel, bearing including the closure and the actuating unit constituting an integral movable component, and a swivel device connected to the actuating unit to swivel about an axis such that when the detachable connection is detached, the swivel device can move the separating wheel, bearing including the closure and the actuating unit as an integral movable component upwardly out of the top of the grinding container and then rotate to expose both the separating wheel and the top opening of the grinding container for servicing.