Patent ID: 6974096

Claim:
Method for causing material to be crushed to collide at least once, in an essentially deterministic manner, with the aid of a: least one collision member, comprising: metering said material onto a rotor ( 222 ) that can be rotated (Ω) about a vertical axis of rotation (O), which metering takes place. With the aid of a metering member at a metering location ( 221 ) close to said axis of rotation (O), which metered material moves outwards from said metering location ( 221 ) towards the outer edge ( 223 ) of said rotor ( 222 ) under the influence of the rotary movement of said rotor ( 222 ); causing said metered material to accelerate, in at least one step, with the aid of an accelerator unit ( 224 ), which accelerator unit is carried by said rotor and consists of at least one guide member that is provided with at least one guide surface that extends towards said outer edge of said rotor, which accelerated material leaves said accelerator unit at a take-off location and is propelled outwards from said rotor along an ejection stream, which take-off location is located a first radial distance (r 1 ) from said axis of rotation, said accelerated material moving along said ejection stream in an increasingly more radial direction from said axis of rotation as said material moves further away from said axis of rotation, viewed from a stationary standpoint; causing said material that moves along said ejection stream ( 227 ) to collide, in an essentially deterministic manner, with the aid of said collision member, which is provided with at least one annular collision surface that is oriented essentially transversely to said ejection stream and is arranged centrally around said rotor, which annular collision surface is located a second radial distance (r 2 ) away from said vertical axis of rotation which is greater than the corresponding radial distance to said outer edge of said rotor, after which said material, when it leaves said collision member, moves further along a movement path; wherein, said second radial distance (r 2 ) from said vertical axis of rotation to said annular collision surface in relation to said first radial distance (r 1 ) from said axis of rotation to said take-off location, the ratio r 2 /r 1 , is chosen at least so large that said material moving along said ejection stream impinges on said annular collision surface at an angle that is equal to or greater than 60°, viewed from a stationary standpoint, the ratio r 2 /r 1 being at least equal to or greater than 1.50.