Abstract: A grinding roller for vertical axis crushers is disclosed herein that is produced by foundry casting of a metal matrix. The roller includes a plurality of reinforcing inserts on its periphery, wherein some portions of the peripheral surface of a same insert are located at a distance d1 or d2 from the work surface depending on wear stresses. Accordingly, the roller has at least one zone experiencing high wear stress Z1, with at least one portion of the insert positioned at a distance d1 near the work surface of said roller; and a zone with low wear stress Z2, with a portion of the insert positioned at a distance d2 that is set back relative to the work surface of the roller. In some examples, distance d1 is less than distance d2.

Abstract: A grinding roller for vertical axis crushers is disclosed herein that is produced by foundry casting of a metal matrix. The roller includes a plurality of reinforcing inserts on its periphery, wherein some portions of the peripheral surface of a same insert are located at a distance d1 or d2 from the work surface depending on wear stresses. Accordingly, the roller has at least one zone experiencing high wear stress Z1, with at least one portion of the insert positioned at a distance d1 near the work surface of said roller; and a zone with low wear stress Z2, with a portion of the insert positioned at a distance d2 that is set back relative to the work surface of the roller. In some examples, distance d1 is less than distance d2.

Abstract: A dynamic air separator for separating materials consisting of particles of different sizes into particle-size fractions. The separator includes a rotary housing and a chamber for recovering the fine particles, which is coaxially arranged in alignment with the rotary housing. The separator also includes a fan wheel positioned coaxially to the chamber for recovering the fine particles. The fan wheel is located at the end of the outlet duct for purified air from the chamber for recovering the fine particles, in order to suck in air during use and send the latter to the air-distribution chamber around the rotary housing.

Abstract: The present invention relates to a dynamic air separator for separating materials consisting of particles of different sizes into particle-size fractions, said separator including a rotary housing (1) and a chamber (2) for recovering the fine particles, which is coaxially arranged in alignment with the rotary housing, characterized in that: said separator includes a fan wheel (3) positioned coaxially to the chamber for recovering the fine particles; and said fan wheel is located at the end of the outlet duct (4) for purified air from the chamber for recovering the fine particles, in order to suck in said air during use and send the latter to the air-distribution chamber (5) around the rotary housing.

Abstract: The present invention relates to a dynamic air classifier for the separation of granular and powdery materials into fractions of different grain sizes comprising a rotary cage, wherein: said classifier also comprises a recovery chamber for fine materials with a outlet bottom, said chamber being defined by a casing; said recovery chamber is coaxially arranged in the protrusion of the rotary cage so as to be able to use the vortex created by the rotary cage for cycloning said material; said recovery chamber comprises openings in the casing allowing the passage of the centrifuged material towards ducts for collecting the material located outside the chamber.

Abstract: The present invention relates to a dynamic air classifier for the separation of granular and powdery materials into fractions of different grain sizes comprising a rotary cage, wherein: said classifier also comprises a recovery chamber for fine materials with a outlet bottom, said chamber being defined by a casing; said recovery chamber is coaxially arranged in the protrusion of the rotary cage so as to be able to use the vortex created by the rotary cage for cycloning said material; said recovery chamber comprises openings in the casing allowing the passage of the centrifuged material towards ducts for collecting the material located outside the chamber.