A grinding chamber of a grinding device for vegetal products suitable to form beverages includes, in its interior, a pair of grinders axially overlapping each other, one of which is rotatable with respect to the other which is kept stationary, a grinder support at least for the rotatable grinder, a motor member connected to the grinder support for setting the rotatable grinder in rotation. The grinding chamber is formed by a first bottom wall, perpendicular to the axis of rotation of the rotatable grinder, adjacent and below the support thereof, and at least a second cylindrical wall, connected axially to the first wall at the peripheral boundary thereof. The grinding chamber also includes a first opening for introducing the product to be ground and with a second opening for discharging the ground product. A labyrinth is provided between the peripheral boundary of the first wall and the grinder support.

A refining member for a pulp refiner comprising a refining body with a refining surface comprising refiner bars separated by refiner grooves and teeth. Each of the refiner bars extend from a radially inward position on the refining surface to a first radially outward position on the refining surface, and the teeth extend to a second radially outward position on the refining surface. The second radially outward position is nearer to an outermost part of the refining body than the first radially outward position. The refiner bars are adapted to refine wood fibers, and the teeth are adapted to break up fiber bundles.

Disclosed is a refiner plate (1) that is adapted to be attached to a rotatable refiner disc (10) on a refiner (100) for mechanical treatment of lignocellulosic material. The refiner plate (1) comprises a refining surface (11) that is adapted to be arranged oppositely a second refining surface (21) of a second refiner disc (20) on said refiner (100). The refining surface (11) is provided with a plurality of refining bars (110), where at least one of the refining bars (110) is provided with cavities (111) that are at least partially embedded in the refining bars. Moreover, at least one cavity (111) provided on the at least one refining bar (110) have one end (111a) arranged closer to the leading edge (112) of a refining bar (110) and one end (111b) arranged closer to the trailing edge (113) of the refining bar and wherein the depth dimension of the cavity at the end (111a) is smaller than the depth dimension of the cavity at the end (111b).

The invention relates to a refining assembly for refining water-suspended pulp fibers between two coaxial refining surfaces which form a refining gap, rotate in relation to each other and are formed by refining bars and grooves extending therebetween. At least one directional component of the refining bars extends radially in relation to the axis of rotation. In order make the refining process more efficient, the refining bars have annular elevations and depressions that run concentrically to the axis of rotation of the refining surfaces and an annular elevation of one refining surface protruding into an annular depression in an opposite refining surface.

A refiner segment (4) for a refiner (1) intended for refining fibrous material (7) has a refining surface and is arrangeable to form a part of a refining surface of a refiner element (2; 3) in the refiner (1). The refiner segment (4) is provided with a pattern of bars (10) and intermediate grooves (11) extending along the refiner segment (4) in a substantially radial direction, and dams (12) extending between the bars (10) and protruding above the surface of the grooves (11). Steam channels (13) are arranged through the bars (10) adjacent to an intersection between a bar (10) and a dam (12), radially outside of a respective dam (12) with respect to an inner edge (41) of the refiner segment (4), and at a trailing end of the respective dam (12) with respect to a first circumferential direction corresponding to an intended travelling direction (20) of the refiner segment (4), where the steam channels (13) are configured to allow steam (8) flowing towards the inner edge (41) of the refiner segment (4) to pass through the steam channels (13) in a direction having a component directed opposite to the first circumferential direction (20).

This disclosure relates to refiner plate segments having feeding grooves having a first width at a first end of the feeding groove, wherein the first end of the feeding groove is disposed closer to an inner diameter of the refiner plate segment, and a second end of the feeding groove having a second width, wherein the second end of the feeding groove is disposed closer to the outer diameter than the first end and wherein the second width is less than the first width. It is believed that the increased width of the feeding groove at the inner diameter, coupled with the change in angle or curve of the feed groove from a feeding angle to a holding angle such that the centrifugal force applied to the lignocellulosic material surpasses the plugging force, allows for improved hydraulic capacity over the refiner plate segment without reducing refining efficiency.

A rotor cap assembly has been conceived using multiple wedge-shaped rotor cap segments, in which the cap segments are disposed on a cap segment retainer and in which the cap segment retainer pilots the multiple rotor cap segments at a diameter intermediate the cap segments' outer diameter and the cap segments' middle diameter. By piloting multiple rotor cap segments with retaining means on the cap segment retainer and positioning means on the multiple cap segments, the rotor cap segments and cap segment retainer assembly may be fixed to a plate holder or directly to a rotor disc of a refiner without substantially altering either the plate holder or the rotor disc.

A refiner plate segment with a continuous transition zone spanning from the periphery or near the periphery of the plate in a substantial spiral toward the axis of rotation of the plate adjacent the breaker bar zone.

The subject of the present invention is a method for processing electrical and electronic components in order to recover valuable materials, such as the metals contained in printed circuit boards. According to this method, the electrical and electronic components are pre-shredded mechanically and then mixed with a liquid before they undergo wet milling (5).

A cyclonic comminuting device includes a set of shearing plates that is adaptable to any colloid mill for improved efficiency and effectiveness in the production of all commodities including, but not limited to, asphalt or bitumen modification, tar, plastics, polymers, cosmetic processing and foods processing. The set of shearing plates includes a set of concave cutting edges. The set of concave cutting edges is applied to radial teeth of a rotor plate and/or a stator plate of the set of shearing plates forming a cyclonic flow pattern of a commodity as the commodity is passed through the comminuting device. The resulting turbulence created by the intersecting concave cutting edges on the rotor plate and the stator plate increases the effective hydraulic shear generated by the rotor plate and the stator plate resulting in greater particle pulverization and resulting in higher quality emulsions with reduced cost of materials required for production.