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.

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.

An impact processing system (10) having a central opening (12) enabling material flow into a primary impact zone (14) in which is located an impact mechanism (16) rotatable about a rotation axis (18). An impact structure (20) provided with a plurality of holes (22) surrounds the impact mechanism (16). The rotatable impact mechanism (16) impacts material entering the primary impact zone (14) from the central opening (12) and accelerate the impacted material in a radial outward direction toward the impact structure (20) to effect fragmentation of the impacted material so that when sufficiently fragmented the material is able to pass through the holes (22). An optional outer structure (30) is radially spaced from the impact structure (20) and may comprise one or more segments that cumulatively extend about the axis of rotation (18) for an angle from 30 and 270 inclusive. A rotatable set of impact members (50) may be located between the impact structure and the outer structure. One or more gaps (28) may be provided in the impact structure (20) to allow the passage of large and/or hard objects that cannot otherwise be fragmented. The outer structure (30) is positioned to span across the gaps (28) so that material passing there thought is directed onto the outer structure (30).

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.

An impact mill (10) has an inlet (12) for material to enter the mill, an impact mechanism (16, 50) arranged to rotate about a rotation axis and being operable to pulverise the material after entering through the inlet, and an outlet (154) for discharge of pulverised material. Blockage sensors (Bj), vibration sensors V, torque sensors Tn, temperature sensors and proximity sensors may be selectively incorporated into the mill.

A impact crusher with dual rotors, an upper rotor (30) and a hammer for the impact crusher are disclosed herein. The upper rotor (30) of the impact crusher comprises two discs on top of each other. The upper rotor (30) comprises a plurality of hammers (40) pointing down, to the outer perimeter of the lower rotor (20) discharging the material to be crushed at high speed. Each hammer (40) has a support shaft (41) that extends vertically between the first disc (31) and the second disc (32). The distance between the first disc (31) and the second disc (32) provides torsional structure to the connection between the hammer and the upper rotor (30).