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.

An impact processing device has a central impact mechanism arranged to rotate about a rotation axis and a first processing stage that includes the impact mechanism and a first structure extending circumferentially about the impact mechanism. The first structure has a first processing sector, and a first screening sector, where the processing sector extends for a first circumferential portion of the first structure and has an impervious textured surface and the first screening sector has a plurality of holes and extends for a second circumferential portion of the first structure. The impact mechanism is operable to impact material against the first processing sector and generate a flow of the impacted material to first screening sector through which at least a portion of the impacted material can pass.

A distributor plate assembly for a vertical shaft impact (VSI) crusher is optimized for abrasion wear resistance. The distributor plate includes a plurality of plate segments, each segment being formed from a main body of ductile iron alloy having cemented carbide granules embedded within the iron alloy.

A crusher having a substantially tubular casing, closed in an upper region by a cover and in a lower region by a base. The crusher also includes a rotating shaft, which is internal and coaxial to the casing, with multiple supporting elements, each element for supporting a number of crushing elements, being keyed to the shaft. The crushing elements have circular trajectories with a circumference that at least partially increases from the upper region toward the lower region of the crusher.

An abrasion wear resistant plate mountable to a rotor of a vertical shaft impact crusher includes a metallic main body, and at least four non-metallic tiles arranged on an upper surface of the main body to form a portion of a contact face facing an internal space of the rotor. Each of the tiles have an abrasion wear resistance greater than that of the main body, each one of the tiles having at least three edges each matching with and positioned against an edge of a neighboring tile.

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).

An impact crusher for grinding and separating solid material has a base, a rotor on the base having an upright shaft defining an upright rotor axis about which the rotor is rotatable, and a drum fixed on the base, spacedly surrounding the rotor, and formed by a pair of generally semicylindrical drum shells fitted together at a plane including the rotor axis. An array of axially extending and angularly substantially equispaced replaceable ribs is provided on an inner surface of the drum. A plurality of impact hammers are angularly substantially equispaced around the rotor and orbitable past the ribs on rotation of the rotor.

An abrasion resistant distributor plate assembly mountable within a rotor of a vertical shaft impact crusher to protect the rotor from abrasive wear caused due to material falling on to the rotor. The distributor plate assembly includes a main body, wear-resistant inserts mounted on the main body having a wear resistance greater than the main body, and an elevated central component directly mounted on the main body, which has a wear resistance greater than that of the inserts.

The disclosure relates to a rotor for a comminution apparatus, the rotor comprising: a frame including an upper plate, a lower plate and wall elements; an inlet opening in the upper plate and one or more outlets located between the upper plate and the lower plate; and a distributor plate arranged at an upper surface of the lower plate below said inlet opening wherein the distributor plate is arranged to launch the material towards the surface, wherein the distributor plate comprises a cavity being open at a lower surface of the distributor plate, wherein the rotor further comprises attachment means for maintaining the distributor plate at the upper surface of the lower plate, wherein said attachment means are arranged to frictionally engage with a corresponding surface of the cavity and wherein the attachment means enable the distributor plate to be repositioned into different wear positions.

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.