Patent ID: 7051964

Claim:
A rotary accelerator device for accelerating non-uniform material with the aid of centrifugal force in at least a first phase, after which said accelerated material is comminuted, comprising: a rotor ( 123 ) that is able to rotate about an axis of rotation ( 131 ) in at least one direction of rotation; a metering member for metering said material onto said rotor ( 123 ); and at least one accelerator unit comprising at least one casted accelerator member ( 126 , 109 ) made up of an accelerator block ( 111 ) joined together with a strengthening member ( 110 ) to form a structural strengthened composite, which strengthening member ( 110 ) is made of a structural material that has an appreciably greater tensile strength than another structural material from which said accelerator block ( 111 ) is made, wherein, a composition of alloys of said strengthening member ( 110 ) and said accelerator block ( 111 ) are different such that when said casted accelerator member is subject to thermal after treatment, said accelerator block ( 111 ) develops a desired hardness and said strengthening member ( 110 ) retains a desired tensile strength, which accelerator block ( 111 ) along one blockside is provided with an acceleration surface ( 114 ) that extends in a direction of a periphery ( 351 ) of said rotor ( 123 ) for accelerating said metered material, which accelerator member is attached to a support member ( 137 ) that is carried by said rotor ( 123 ) in such a way that said accelerator member can be dismantled for replacement because of wear, said strengthening member ( 110 ) is plate-like and joined with a plate surface or attachment side ( 120 ) to an attachment surface ( 355 ) that is located opposite of said acceleration surface ( 114 ) and extends in the direction of the periphery ( 351 ) of said rotor ( 123 ), the thickness of which strengthening member ( 110 ) is less than one third of the thickness of said accelerator block ( 111 ) between said acceleration surface ( 114 ) and said attachment surface ( 355 ), and which strengthening member ( 110 ) is provided with at least one fixing member ( 112 , 113 ) for fixedly attaching said accelerator member to said support member ( 137 ).