A cutter assembly and high volume submersible shredder pump. These are for reducing the size of solids within a liquid which is to be pumped by chopping, grinding, shredding or cutting. An improvement over prior designs employs a cutting assembly having a rotary cutter and a cup-shaped, concave, plate cutter having a circular horizontal cross-section. The plate cutter is adapted for mounting to an intake opening of a stationary volute, associated with a shredder pump. The cutting assembly has cutting lobes having a grooved surface which mate with corresponding grooves of the shaped, concave, plate cutter. As a result, many more cutting surfaces are provided which more effectively and quickly shred the solid materials within the liquid to be expelled.

A method of producing a powder suitable for additive manufacturing and/or powder metallurgy applications from a precursor particulate material comprising: subjecting the precursor particulate material to at least one high shear milling process, thereby producing a powder product having a reduced average particle size and a selected particle morphology.

Grinding mechanisms for food waste disposers, and food waste disposers having grinding mechanisms are disclosed herein. The grinding mechanisms include a stationary grinding ring that includes a plurality of grater teeth, and a rotating shredder plate that includes at least one lug. The at least one lug may have at least a portion that is movable with respect to the top surface of the rotating shredder plate, or may be fin shaped.

A milling device for implementing a milling operation including a milling unit having a body including a milling chamber that can be filled with a material to be milled, a rotor mounted so as to be able to rotate around a shaft in the body, a screen, and a drive unit controlling the movements of the rotor with respect to the screen during the milling operation. The drive unit is designed to impart an oscillating movement to the rotor around the shaft, the oscillation angle being variable during the milling operation. The milling chamber is configured to direct the product to be milled in a direction substantially parallel to the rotation shaft of the rotor.

Machines and methods adapted to process, for example, to reduce the size of, disperse, or homogenize, a variety of materials and compositions. Such methods and machines are capable of reducing the size of a material and dispersing the material in a liquid by cutting the material with knives located along a perimeter of an annular-shaped cutting head, causing the cut material to flow radially outward from the cutting head through gaps between the knives, and flowing a liquid through passages in the cutting head that cause the liquid to cascade around the knives of the cutting head in an axial direction of the cutting head.

A comminution device (2) for laboratory operation is presented and described, particularly a laboratory mill, especially particularly a centrifugal mill, comprising a milling tool arranged in a milling chamber (3), a housing assembly and a milling material channel (12) running through the housing assembly and opening into the milling chamber (3), for supplying milling material to the milling chamber (3) and/or for discharging milled material from the milling chamber (3), particularly wherein the milling material channel (12) is open to the environment and/or can be opened, especially particularly for successively supplying a milling material to the milling chamber (3) during the milling operation. According to the invention, at least one system for passively reducing noise emissions is situated in the region of the milling material channel (12).

A grinding device including a rotor, mounted in rotational manner around an axle and having a plurality of blades extending radially relative to the axle. A sieve has a plurality of openings, with the sieve being mounted around the rotor so as to turn around the axle in the direction opposite the direction of rotation of the rotor. The rotor and sieve each has a height extending parallel to the axle and a width extending perpendicular to the axle wherein the width is between 1 mm and 20 mm. The rotation of the rotor and of the sieve is adjustable so as to reach a difference in circumferential speed between the rotor and the sieve between 100 m/s and 400 m/s, so as to reduce the average initial size of the crushed matter by a factor of 5 to 20.

The invention relates to a laboratory mill comprising at least one counter-vibration device (27) which has at least one control unit (29a) for providing a counter-vibration signal (29b) and at least one controllable vibration generation unit (29) for converting the counter-vibration signal (29b) into counter-vibrations (30), wherein the vibration-generation unit (29) counteracts a device- and/or housing part (31) of the laboratory mill (1) and the counter-vibrations (30) lead to an active reduction in the vibrations of the device- and/or housing part (31) and/or an at least partial suppression of noise-inducing vibrations of the device- and/or housing part (31), by means of destructive interference.

A cone mill comprises a rotating tool for moving friable material across a static conical screen. The tool is driven to rotate by a tool drive shaft. The mill includes a motor, the motor causing rotation of a motor drive shaft. The tool drive shaft and the motor drive shaft are located an angle with respect to each other and the mill comprises a universal joint for transferring rotary motion from the motor through the angle to the tool.

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce a product such as a biofuel.