Patent ID: 9199243
Filing Date: 2015-12-01
Classification: B02C,B07B,E02F

Abstract:
1. A method of crushing a mineral material, comprising the steps of: delivering the mineral material to a crushing space of a bucket, the bucket forming a supporting frame and including: in said crushing space, subjecting the mineral material, by at least one crusher drum provided with crusher blades, to impacts decreasing its particle size, mineral particles having a size meeting a predetermined cross-sectional measure being delivered to be discharged from the crushing space; while loading the bucket, the mineral material first filling said storage space, the storage space preceding the crushing space; tilting the bucket such that continuing inclination thereof delivers the mineral material from the storage space towards the at least one crusher drum and at least one transfer and screening drum provided in the crushing space, utilizing gravitational force, the at least one crusher drum and at least one transfer and screening drum extending over an entire cross-section of the crushing space and being arranged on a plane which forms an angle diverging from perpendicular with respect to the bottom plate of the bucket; separating, in the crushing space, finer particles having a predetermined size from the mineral material currently being delivered to the at least one crusher drum and at least one transfer and screening drum, whereafter rotating motion of the at least one crusher drum and at least one transfer and screening drum provided in the apparatus is started; delivering the mineral material currently remaining in the crushing space to at least one transfer and screening drum rotated around an axle, which transfer and screening drum moves the material towards the at least one crusher drum, the transfer and screening drum pre-crushing the material, and sufficiently small material fraction having a predetermined diameter may again be discharged; causing the mineral material to meet the at least one crusher drum which is provided in the crushing space and which is rotated around an axle, whereby the crusher drum, by its crusher blades arranged between discs protruding from the axle of the crusher drum, delivers to at least a portion of the material flow impacts decreasing the particle size of the mineral material, at the same time transferring the mineral material towards a crusher plate while mineral particles having a size meeting a predetermined cross-sectional measure are delivered to become discharged from the crushing space from between the discs; and causing the mineral material remaining in the crushing space to be subjected, by the crusher blades of the crusher drum, to impacts wedging this mineral material against the crusher plate and decreasing the particle size thereof, mineral particles achieving a size having the predetermined cross-sectional measure being delivered to be discharged from the crushing space.