An abrasion resistant wear plate is mountable within a rotor or a vertical shaft impact crusher to protect the rotor from material fed into the rotor. The wear plate includes a main body that mounts and supports at least one abrasion resistant insert to define, in part, a contact face over which feed material is configured to flow.

The present disclosure relates to a vertical shaft impact crusher comprising a rotor having a rotor protection layer which consists of particles of objects to be crushed. The rotor includes at least: a rotor upper plate comprising a rotor upper plate hole, which is an inlet for the object for crushing which is inserted into the rotor; a rotor lower plate disposed to be separated from the lower portion of the rotor upper plate; a rotor upper plate; a rotor side wall disposed between the rotor upper plate and the rotor lower plate and coupled to the rotor upper plate and the rotor lower plate, the rotor side wall being disposed at a position spaced from the rotation center of the rotor; and a circular hole which is formed on the rotor side wall and is an outlet for the object for crushing accelerated by the rotor to come out of the rotor.

A wear tip holder for holding a wear tip adjacent to an outflow opening of a vertical rotor wall of a rotor of a VSI crusher includes a mounting plate for mounting the wear tip holder to the rotor wall. The mounting plate has a mounting face for facing a segment of the rotor wall to which it is to be mounted and a wear face, opposite the mounting face, for facing the interior of the rotor. A side wall extends between the mounting face and the wear face. The side wall includes a material retention surface facing, when in use, the rotor wall segment, thereby allowing material to be trapped under the material retention face.

A wear tip holder for holding a wear tip adjacent to an outflow opening of a vertical rotor wall of a rotor of a VSI crusher includes a mounting plate for mounting the wear tip holder to the rotor wall. The mounting plate has a mounting face for facing the rotor wall to which it is to be mounted, and opposite the mounting face, a wear face for facing the interior of the rotor. A wear body is connected to the mounting plate and is provided with an elongate wear tip recess for holding the wear tip. At least one material retention groove extends along the wear tip recess at a position upstream, as seen in a direction of an intended flow of material to be crushed, of the wear tip recess. The material retention groove has an upstream groove wall and a downstream groove wall, the downstream groove wall forming an acute angle with the wear face for retaining material to be crushed.

A breaker liner attachment structure for a vertical shredder including a rotor, a cylindrical shell, and a breaker, includes: a void that has an opening on an upper side and formed in an area between breaker liners in the breaker; and bolt insertion holes formed to extend from inner walls of the void to side surfaces of the breaker. Bolts are inserted into the bolt insertion holes via attachment holes formed in the breaker liners. The bolts are fastened with nuts from a side of the inner walls of the void.

A breaker liner attachment structure for a vertical shredder including a rotor, a cylindrical shell, and a breaker, includes: a void that has an opening on an upper side and formed in an area between breaker liners in the breaker; and bolt insertion holes formed to extend from inner walls of the void to side surfaces of the breaker. Bolts are inserted into the bolt insertion holes via attachment holes formed in the breaker liners. The bolts are fastened with nuts from a side of the inner walls of the void.

In a discharge portion liner attachment structure for a vertical shredder including a sweeper supported below a rotor in such a manner as to be coaxial with a rotation shaft, a discharge ring disposed on a circumference portion of the sweeper, and a discharge portion through which a shredding target object that has been swept out through an opening formed on a circumference wall of the discharge ring by a sweeping operation performed by the sweeper is discharged to outside, discharge portion liners are attached in such a manner as to protrude from a side of the discharge portion to a side of the discharge ring in such a manner as to cover edge portions of ones of the discharge ring liners on a side of the opening.

A mineral material crusher and method of operating a mineral material crusher that includes: a body, a rotating crusher element, a drive shaft arrangement that supports the rotating crusher element to the body and to rotate the rotating crusher element, and a motor including a rotor for driving the drive shaft arrangement. The motor is formed inside the rotating crusher element and the drive shaft arrangement is configured to form of the rotor a rotating axle that is rigidly coupled with the rotating crusher element and capable of leading torque from the rotor to the rotating crusher element for rotating the crusher element around the drive shaft.

An impact material processing device has a central impact mechanism arranged to rotate about a rotation axis and at least one stator extending circumferentially about the impact mechanism. Each stator has one or more openings through which material impacted by the impact mechanism can pass. A housing extends about the stator and between an upper plate and a base plate. Each stator is located within the housing and can be moved between a first position and a bypass position. In the first position a lower edge of one or more stator is on the base plate and an upper edge extends to at least an inside surface of the upper plate. In the bypass position the stator is moved to where the lower edge of the stator is lifted from the base plate to form a gap through which material entering the device can flow radially beyond the stator.

A multistage hammer mill 10 has a plurality of milling stages arranged concentrically so that substantially all material in a first innermost of the milling stages passes through all subsequent adjacent milling stages. A central feed opening 12 enables material flow into a primary impact zone 14 of a first milling stage, which has an impact mechanism 16 and a first screen arrangement 20a. The impact mechanism 16 rotates about a rotation axis 18. The first screen arrangement 20a is disposed circumferentially about and radially spaced from the impact mechanism 16 and has a plurality of apertures 22 through which impacted material of a first size range can pass. A second milling stage has a second arrangement 20b disposed circumferentially about and radially spaced from the first screen arrangement 20a and a circular array of impact elements 50a between the first and second screen arrangements.