An apparatus for classifying fine particles in slurry provides a sharp particle size distribution with few mixed coarse particles and high classification accuracy.

The apparatus includes a rotor (15) including classification chambers (17) between blades (16) radially arranged at circumferentially regular intervals, and classifies particles so that a classified particle size is constant in an entire radial region from an outer periphery to an inner periphery of the classification chamber. The blade (16) of the rotor has a circumferential thickness t(d) increasing toward the outer periphery, and the classification chamber (17) has a width increasing toward the inner periphery.

The invention relates to a shell plate, to a method for making a shell plate and to a grinding mill for ore grinding. The shell plate is mountable to a shell of a grinding mill for grinding ore and includes a shell plate body having a first portion including a fixing surface for fixing the shell plate body to the shell, and a second portion having a wear surface facing toward an interior of the grinding mill. The first portion and the second portion form a continuous shell plate body, and the second portion includes polyurethane such that the wear surface is made of polyurethane.

The present invention relates to a grinder using induced electric fields. The grinder comprises: a grinding unit on which a plurality of protrusions for cutting are disposed on an outer circumferential surface thereof; a power unit disposed in the grinding unit to generate electric fields and attach the conductive materials to the grinding unit; and a chamber disposed outside the grinding unit and comprising beads that disperse and grind the conductive materials attached to the grinding unit, wherein the conductive materials have directionality by the electric fields of the power unit.

Apparatus and method for processing materials such as granular matter mined from deposits, comprising a tubular container disposed upright and an axle device provided centered therein. A processing chamber for receiving the material to be processed is provided between the axle device and the inner wall of the tubular container. The tubular container is driven rotatingly. Engaging dogs are provided in the processing chamber as working elements.

Modular shredding rings for implementation in waste disposers, such as food waste disposers, as well as waste disposers employing such modular shredder rings and related methods of operating and assembling, are disclosed herein. In an example embodiment, a food waste disposer includes a food conveying section, a motor section, and a grinding section that are all supported by or formed within a housing. The grinding section includes a rotating plate and a modular shredder ring, the modular shredder ring including an annular support structure and a plurality of shredder modules mounted upon or coupled to the annular support structure. Additionally, the respective shredder modules are respectively positioned along respective different portions of a radially-inwardly-facing annular surface of the annular support structure. Further, each of the respective shredder modules includes one or more respective first contacting formations that at least partly define one or more respective first spaces.

Modular shredding rings for implementation in waste disposers, such as food waste disposers, as well as waste disposers employing such modular shredder rings and related methods of operating and assembling, are disclosed herein. In an example embodiment, a food waste disposer includes a food conveying section, a motor section, and a grinding section that are all supported by or formed within a housing. The grinding section includes a rotating plate and a modular shredder ring, the modular shredder ring including an annular support structure and a plurality of shredder modules mounted upon or coupled to the annular support structure. Additionally, the respective shredder modules are respectively positioned along respective different portions of a radially-inwardly-facing annular surface of the annular support structure. Further, each of the respective shredder modules includes one or more respective first contacting formations that at least partly define one or more respective first spaces.