A base and ring assembly for a grinding mill includes a base structure with a support plate, an annular support-ring fixedly secured to and positioned above the support plate. The support-ring has a radially inward facing convex surface that extends from a support-ring lower axial end to a support-ring upper axial end. The assembly includes an annular grinding-ring that has a radially outward facing concave surface which extends from a grinding-ring lower axial end to a grinding-ring upper axial end. The grinding ring has a radially inward facing grinding surface. The radially outward facing concave surface is complementary in shape to and engages the radially inward facing convex surface.

A base and ring assembly for a grinding mill includes a base structure with a support plate, an annular support-ring fixedly secured to and positioned above the support plate. The support-ring has a radially inward facing convex surface that extends from a support-ring lower axial end to a support-ring upper axial end. The assembly includes an annular grinding-ring that has a radially outward facing concave surface which extends from a grinding-ring lower axial end to a grinding-ring upper axial end. The grinding ring has a radially inward facing grinding surface. The radially outward facing concave surface is complementary in shape to and engages the radially inward facing convex surface.

A planetary roller mill for processing a feed material includes a vessel with a grinding ring having an opening therethrough and a first area. The grinding ring is in sealing engagement with the inside surface of the vessel assembly. At least two non-circular support plates are secured to a rotatable shaft. Each plate has an axially facing surface. A plurality of rollers rotatably are mounted to and positioned between the two support plates. Each of the plurality of rollers are in grinding communication with the grinding surface. The planetary roller mill includes an air supply system having an outlet in communication with the opening in the grinding ring. Areas of the two support plates are of magnitudes which configure a flow area through the opening of at least 30 percent of the first area to provide a predetermined quantity of heated air to remove moisture from the feed material in the grinding assembly.

A planetary roller mill for processing a feed material includes a vessel with a grinding ring having an opening therethrough and a first area. The grinding ring is in sealing engagement with the inside surface of the vessel assembly. At least two non-circular support plates are secured to a rotatable shaft. Each plate has an axially facing surface. A plurality of rollers rotatably are mounted to and positioned between the two support plates. Each of the plurality of rollers are in grinding communication with the grinding surface. The planetary roller mill includes an air supply system having an outlet in communication with the opening in the grinding ring. Areas of the two support plates are of magnitudes which configure a flow area through the opening of at least 30 percent of the first area to provide a predetermined quantity of heated air to remove moisture from the feed material in the grinding assembly.

A flexible vertical grinder, having a main shaft mounting frame (4) on a grinder frame (1); a main shaft (3) is mounted on the main shaft mounting frame; a stelliform bracket (9) is mounted on the main shaft; a hammer wheel grinder and a material-sorting balance wheel device are mounted on the stelliform bracket; the material-sorting balance wheel (4) and the hammer wheel (17) are on the same horizontal plane. The vertical grinder can apply different grinding forces according to different specific surface areas of the to-be-ground material, and can grind materials of different grades properly but not excessively, thus greatly improving crushing efficiency, having good overall rigidity and stable operation, and facilitating maintenance.

A flexible vertical grinder, having a main shaft mounting frame (4) on a grinder frame (1); a main shaft (3) is mounted on the main shaft mounting frame; a stelliform bracket (9) is mounted on the main shaft; a hammer wheel grinder and a material-sorting balance wheel device are mounted on the stelliform bracket; the material-sorting balance wheel (4) and the hammer wheel (17) are on the same horizontal plane. The vertical grinder can apply different grinding forces according to different specific surface areas of the to-be-ground material, and can grind materials of different grades properly but not excessively, thus greatly improving crushing efficiency, having good overall rigidity and stable operation, and facilitating maintenance.

A brewer's spent grain (BSG) grinder includes a charging tank connected to a grinding unit, the charging tank being equipped with a device for BSG moistening, and the grinding unit having an outlet for discharging grinded BSG. The grinding unit includes a stator and a rotor located coaxially with a gap defined between their working surfaces. A device for mixing and moving a mixture into the gap is fixed on a central part of an upper side of the rotor. A device for discharging grinded BSG is located under the rotor. The rotor is configured to allow staged grinding of BSG to obtain coarser and finer fractions of BSG at upper and lower stages of the rotor respectively. An upper part of the rotor is equipped with blades located around a circumference of the rotor, an outer surface of each blade being part of the working surface of the rotor.

A brewer's spent grain (BSG) grinder includes a charging tank connected to a grinding unit, the charging tank being equipped with a device for BSG moistening, and the grinding unit having an outlet for discharging grinded BSG. The grinding unit includes a stator and a rotor located coaxially with a gap defined between their working surfaces. A device for mixing and moving a mixture into the gap is fixed on a central part of an upper side of the rotor. A device for discharging grinded BSG is located under the rotor. The rotor is configured to allow staged grinding of BSG to obtain coarser and finer fractions of BSG at upper and lower stages of the rotor respectively. An upper part of the rotor is equipped with blades located around a circumference of the rotor, an outer surface of each blade being part of the working surface of the rotor.

A planetary roller mill for processing a feed material includes a vessel with a grinding ring having an opening therethrough and a first area. The grinding ring is in sealing engagement with the inside surface of the vessel assembly. At least two non-circular support plates are secured to a rotatable shaft. Each plate has an axially facing surface. A plurality of rollers rotatably are mounted to and positioned between the two support plates. Each of the plurality of rollers are in grinding communication with the grinding surface. The planetary roller mill includes an air supply system having an outlet in communication with the opening in the grinding ring. Areas of the two support plates are of magnitudes which configure a flow area through the opening of at least 30 percent of the first area to provide a predetermined quantity of heated air to remove moisture from the feed material in the grinding assembly.

A planetary roller mill for processing a feed material includes a vessel with a grinding ring having an opening therethrough and a first area. The grinding ring is in sealing engagement with the inside surface of the vessel assembly. At least two non-circular support plates are secured to a rotatable shaft. Each plate has an axially facing surface. A plurality of rollers rotatably are mounted to and positioned between the two support plates. Each of the plurality of rollers are in grinding communication with the grinding surface. The planetary roller mill includes an air supply system having an outlet in communication with the opening in the grinding ring. Areas of the two support plates are of magnitudes which configure a flow area through the opening of at least 30 percent of the first area to provide a predetermined quantity of heated air to remove moisture from the feed material in the grinding assembly.