Abstract: A lifter bar for an open-ended grinding mill that includes an elongated bar structure and at least one groove portion provided in the elongated bar structure. The groove portion is configured to open on the side of the lifter bar facing outwards from the grinding mill volume, when the lifter bar is mounted onto the grinding mill. The groove portion is provided with at least one through hole opening for a mounting member.

Abstract: A split pulp chamber insert assembly formed for installation in a pulp chamber on a discharge end wall in a grinding mill rotatable about an axis thereof. The split pulp chamber insert assembly include two or more insert elements, configured to cooperate to form a lining covering one or more portions of pulp chamber surfaces that partially define the pulp chamber in which the insert elements are positioned. The split pulp chamber assembly also includes a number of fasteners, for securing the insert elements in predetermined positions in the pulp chamber relative to each other to form the lining that covers the one or more portions of the pulp chamber surfaces.

Abstract: Disclosed are compounds of Formula (I?), methods of using the compounds as immunomodulators, and pharmaceutical compositions comprising such compounds. The compounds are useful in treating, preventing or ameliorating diseases or disorders such as cancer or infections.

Abstract: A lifting wall arrangement at an end wall of a drum mill, having a plurality of segments which are removably installable on the end wall. Each segment includes an inner wall and an opposing outer wall. At least one lifting blade is arranged on the outer wall, such that the outer wall, the lifting blade and the inner wall define a discharge channel leading to a discharge cone. The inner wall forms a part of a sieving wall in the drum mill. Each segment constitutes an integrated unit adapted to be installed on the end wall. Other embodiments include a segment of a lifting wall arrangement and a drum mill having a lifting wall arrangement.

Abstract: Disclosed herein is an apparatus for dispersing a nanocomposite material. That apparatus includes an inner chamber in which a metal powder, a nanocomposite material and inner pellets are charged. The inner chamber also includes a plurality of apertures each having a smaller diameter than that of each inner pellet. Furthermore, the apparatus includes an outer chamber that surrounds the inner chamber and includes outer pellets in a space between a wall of the inner chamber and a wall of the outer chamber.

Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber toward a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber, and a shroud having a number of cover elements and a number of openings located at least partially therebetween. The shroud is movable relative to the body between an open position, in which the openings are at least partially aligned with at least preselected ones of the apertures to permit the slurry to flow therethrough into the pulp lifter chamber, and a closed position, in which the cover elements are at least partially aligned with at least predetermined ones of the apertures, to at least partially prevent the slurry flowing through the apertures back into the mill shell chamber.

Abstract: A grinding mill liner has a plurality of liner elements with respective bolt passages that are placed such that the passages, when the liner is installed into a mill shell, are placed outside a footprint of a peripheral device on the mill shell. Most typically, the peripheral device is a gearless motor drive that is operationally coupled to the mill shell in a position other than the end of the mill shell.

Abstract: An herbal grinder and reservoir having a conical shape wherein said herbal grinder comprises a top grinding cap and a grinding section comprising a plurality of grinding knives; and wherein said grinding section comprises a plate having a drop through pattern for allowing ground material to exit the grinding section and fall into the reservoir.

Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber toward a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber, and a shroud having a number of cover elements and a number of openings located at least partially therebetween. The shroud is movable relative to the body between an open position, in which the openings are at least partially aligned with at least preselected ones of the apertures to permit the slurry to flow therethrough into the pulp lifter chamber, and a closed position, in which the cover elements are at least partially aligned with at least predetermined ones of the apertures, to at least partially prevent the slurry flowing through the apertures back into the mill shell chamber.

Abstract: The invention concerns a method and an arrangement for the output of mineral material from a drum mill having a horizontal rotation axis, a sieving wall at its end wall, material can leave through the sieving openings in to pulp-lifting chambers, limited by the sieving wall, the end wall, a limiting wall, and limiting walls that lead towards an output cone, whereby material in the pulp-lifting chamber is emptied down towards the output cone when the pulp-lifting chamber is an upper part of a revolution. In order to increase the rate of revolution, material that does not reach the material output cone is collected in a material collection pocket which carry the material at a level radially closer to the rotation axis than the inner limiting wall, whereby collected mineral material leaves the material collection pocket during, a subsequent revolution.

Abstract: An apparatus for morcellating tissue specimens comprises a housing and a cutting member. The cutting member is operable to cut tissue specimens into morcellated or minced tissue pieces. The cutting member may include one or more screens. One of the screens may be rotatable or capable of reciprocating relative to the housing. One screen may cooperate with another screen to provide shearing of the tissue specimens. The cutting member may include a plurality of discs that are rotatable relative to the housing. The discs may include inwardly directed notches formed in their outer perimeter, with the notches cooperating with an interior wall of the housing to cut tissue specimens. The discs may include perimeters having ovular or elliptical shapes that cooperate with a cylindrical interior wall of the housing to cut tissue specimens. The apparatus may be a stand-alone apparatus or may be incorporated into a tissue harvesting apparatus.

Abstract: A discharge end liner attachable to a discharge end wall in a grinding mill. The discharge end liner includes a number of pulp lifter elements mountable on the discharge end wall for at least partially defining a number of chambers rotatable in the predetermined direction respectively between a submerged condition and a raised condition. The discharge end liner also includes one or more grate subassemblies positionable on the pulp lifter elements, for at least partially screening the slurry. At least a part of each grate subassembly is located by an outer portion of the pulp lifter element in a predetermined position relative to the discharge end wall. An inner portion of each pulp lifter element defines an obtuse angle between the inner portion and the outer portion, for permitting the retained portion of the slurry to evacuate from each chamber respectively while each chamber is in the raised condition.

Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber in a rotating mill shell to a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having a number of apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber. The discharge grate assembly also includes a number of louvers movable between a closed position, in which the apertures in the body are at least partially covered by the louvers, and an open position, in which the apertures are at least partially unobstructed by the louvers.

Abstract: A pulp lifter for installation in a rotary grinding mill has a leading edge wall and a trailing edge wall with respect to rotation of the mill. The leading edge wall and the trailing edge wall define a pulp lifter chamber, and a grate allows slurry to pass to a radially outward collecting region of the pulp lifter chamber for removal from the mill by way of a radially inward discharge region of the pulp lifter chamber. In one embodiment, a gate is positioned between the collecting region and the discharge region, the gate being movable between an open position, in which the gate permits solid material to pass from the collecting region to the discharge region, and a closed position, in which the gate prevents return movement of solid material from the discharge region to the collecting region.

Abstract: A pulp lifter assembly for a rotary grinding mill includes an outer pulp lifter having walls defining a pulp lifter chamber and an outlet opening for radially inward discharge of slurry from the pulp lifter chamber, and an inner discharger disposed radially inward of the outer pulp lifter and circumferentially offset from the outer pulp lifter. The inner discharger defines a passage for conveying slurry substantially radially inward. A transition discharger is disposed radially between the outer pulp lifter and the inner discharger. The transition discharger has a first wall bounding an interior space and a second wall dividing the interior space into first and second regions. The second wall includes a guide that bounds a channel connecting the outlet opening of the outer pulp lifter to the passage defined by the inner discharger.

Abstract: Apparatus (10) for treating a waterway having low pH and containing metals such as aluminium in solution, as a result of runoff from acid sulphate soils, is capable of dosing the waterway with a variety of reagents, to bring the metals out of solution and to achieve a neutral pH. The apparatus (10) includes a rotating drum tumbler (14) having a cylindrical drum (52) which, as it rotates, causes limestone rock to abrade to produce particles of calcium carbonate with which the waterway may be dosed. The inner surface of the drum (52) is provided with an abrasive surface (68) which contacts rock pieces (74) and transports them within the drum (52) as the drum (52) rotates, and with guide vanes (72) which contact and deflect the rock pieces (74), causing the rock pieces (74) to abrade each other. Other reagents in liquid and/or powder form may also be dispensed.

Abstract: A grinding mill has an outer housing and a rotor mounted in the housing to form a grinding zone between the housing and rotor into which a charge to be ground is introduced. A pair of spaced rings are located at the entranceway to the grinding zone to form an annular gap through which the charge passes. At least one of the rings is adjustable to vary the gap width in response to one or more mill operating parameters. The rings control the flow of the charge into the grinding zone and reduce the size of the charge particles before they enter the grinding zone.

Abstract: A rotor for food pulping or straining machines is equipped with a plurality of blades (2) designed to act on the food product to force at least part of it out through a sieve (3) that surrounds the rotor (1) and is characterised in that the blades (2) are shaped in such a way as to cause sudden changes of direction in the moving product particles, thus producing a rapid succession of impulses that act on substantially stationary product particles adhering to the sieve (3), these impulses causing the propulsion of the substantially stationary product particles.

Abstract: A rotatable assembly for a machine includes a rotatable shaft having a longitudinal axis and a rotatable member disposed about the shaft. The rotatable assembly also includes at least one first connecting member operatively mounted to the rotatable member and to the shaft at a first location along the longitudinal axis of the shaft. The rotatable assembly includes at least one second connecting member operatively mounted to the rotatable member and located at a second location spaced from the first location along the longitudinal axis of the shaft. The rotatable assembly further includes a bearing operatively mounted to the shaft, wherein the second connecting member is operatively mounted to the bearing to allow the shaft to twist without permanent deformation when a concentrated load is subjected to the shaft as the rotor is rotated.

Abstract: A granulator for reducing the size of plastic particles to facilitate the removal of contaminants therefrom. The granulator includes an upper chamber and a lower chamber defined by an exit screen. The upper chamber includes a rotary shear and an air handling system for creating a pressure drop across the screen to facilitate the transit of particulate material therethrough.

Abstract: The test mill is a reduced-scale model of an industrial mill used in the mining industry and comprising a rotary shell (10) capable of rotating about its longitudinal and horizontal axis. This shell is capable of containing a certain amount of grinding media and of receiving a certain amount of material to be ground so as to be able to operate under conditions comparable with those of an industrial mill. The shell is divided, in the longitudinal direction, by a perforated transverse partition (24), into a grinding chamber (20) and a measurement chamber (22), the perforations in the partition being sized to hold the grinding charge back and allow the ground matter to pass through, whereas the shell (10) comprises a series of injectors (28) allowing fluid products to be injected into the grinding chamber (20). It is possible to make in-situ and continuous analyses of the pulp in the measurement chamber.

Abstract: A grate segment fastening system for an ore grinding machine, comprising a grate, including a top surface and a bottom surface opposite the top surface, wherein the top surface and the bottom surface are separated by a grate thickness, the grate being defined in use by an axis end, and a circumferential end opposite the axis side; wherein the grate is further defined by a second lateral surface, and a first lateral surface opposite the second lateral surface, the first lateral surface further comprising a raised mounting portion wherein at least one mounting bore extends into and through the body of the raised mounting portion, a plurality of throughput apertures extending through the grate from the top surface to the bottom surface and, a grate holder, including a top surface and a pulp lifter contact surface, opposite the top surface, the grate holder being defined by an axial end, and a circumferential end opposite the axial end, an anchor bore of predetermined transverse size extending from the top surfac

Abstract: A method for re-using unneeded expanded styrene and an apparatus for preparing comminuted expanded styrene that can be used as a starting material for injection molding. The expanded styrene is rendered re-usable through a first step of comminuting expanded styrene, a second step of illuminating far-infra-red light to the expanded styrene comminuted by the first step to reduce its volume, a third step of further comminuting expanded styrene, reduced in volume by the second step, to prepare a granulated material, and a fourth step of injection-molding the granulated material from the third step to prepare a regenerated article.

Abstract: The test mill is a reduced-scale model of an industrial mill used in the mining industry and comprising a rotary shell (10) capable of rotating about its longitudinal and horizontal axis. This shell is capable of containing a certain amount of grinding media and of receiving a certain amount of material to be ground so as to be able to operate under conditions comparable with those of an industrial mill. The shell is divided, in the longitudinal direction, by a perforated transverse partition (24), into a grinding chamber (20) and a measurement chamber (22), the perforations in the partition being sized to hold the grinding charge back and allow the ground matter to pass through, whereas the shell (10) comprises a series of injectors (28) allowing fluid products to be injected into the grinding chamber (20). It is possible to make in-situ and continuous analyses of the pulp in the measurement chamber.

Abstract: A continuous pulp digester having an elongate horizontally aligned pressure vessel through which the wood chips and digesting fluid flow in a forward direction. In a first and second embodiments within the pressure vessel there is an inner container defining an elongate chamber or passageway having a square cross sectional configuration. In a third embodiment the digesting chamber is cylindrical. At locations along the digester, there are several pair of liquid flow inlets and liquid flow outlets which enable filtrate from a pulp washer and a digesting agent to be moved into and across the digesting chamber to flow out the flow outlets. These are recirculated in a net upstream flow pattern toward the outlet end of the digester, and discharged as black liquor at different locations in the digester.

Abstract: A discharge assembly mounts inside a grinding mill on a mill shell at a discharge end of the mill and rotates about a longitudinal axis of the mill. The discharge assembly includes a plurality of ring sections forming an assembly covering the mill shell at the discharge end. Each ring section has an outer surface supported on the mill shell and inner surfaces forming a radially extending discharge passageway. Each ring section connects to an adjacent ring section to form a lapped joint therebetween and additional radially extending discharge passageways. Each lapped joint seals the mill shell from the discharge passageway to prevent discharged material contained therein from wearing the mill shell.

Abstract: A planetary ball mill in which a plurality of mill pots revolve by receiving a rotational force from a main shaft, while rotating on their own axes. A feed is continuously supplied to the mill pots so that ground particles are discharged out of the mill pots utilizing air flow. A partition for dividing a grinding chamber from a discharge pipe is disposed on the discharge side of the chamber of each mill pot so as to permit only the feed already ground to pass through. The feed having passed through the partition is collected by way of a discharge chute not rotating but surrounding a discharge pipe which rotates relative to the discharge chute to generate a negative pressure which assists the discharge of ground feed from each mill pot.

Abstract: A ball-tube mill in which an inclined wall dividing the mill into coarse and fine grinding chambers occupied by grinding bodies has through holes for the passage of the material being ground provided in a portion of contact of the surface of the inclined wall with the grinding bodies present in the coarse grinding chamber. The through holes have a length much greater than their width with their elongated side running in parallel with an outer contour of the inclined wall.

Abstract: A ball tube mill in which an inclined wall dividing a housing of the mill into coarse and fine grinding chambers is fabricated from rigidly interconnected rods forming therebetween through slots for the passage of the material being ground. Part of each slot in the area of contact of the inclined wall with the grinding bodies at the side of the fine grinding chamber has a width smaller than the part of each slot at the remaining portion of the inclined wall at the side of the fine grinding chamber.

Abstract: A mechanism and method for the comminuting and grinding of brittle grinding stock including a roll press with the material passed from the roll press to a deagglomeration drum which co-rotates with the tube mill. The material from the deagglomeration drum is passed to the tube mill and the material from the tube mill being passed to a separator. In one form the material from the separator is passed to a second separator and the coarser products from the second separator are led back to the tube mill with an airstream conducting the finer material from the tube mill to the first separator.

Abstract: A gas swept tube mill has a rotary shell (1) supported on a bearing (5) by a slide ring (3), which is reinforced by a stiffening web plate (4). Ground material and gas pass out of the mill shell through a sieve plate (10) and openings (8) in a frustoconical connecting section (12) into a stationary casing (9). The wider end of the section (12) is of similar diameter to the shell (1), to which it is fastened, and the narrower end of the section (12) is fastened to a drive shaft (7) for rotating the shell (1).

Abstract: An apparatus for fiberizing and screening of fibrous material, which comprises of a rotating drum (1) the drum wall (2) of which consists of a non-perforated (7) and a perforated (8) part. The non-perforated part in the inlet end of the drum is separated from the perforated part in the outlet end of the drum by means of a partition wall (9) having an opening (10). The height (h) of the partition wall varies so that a periodical overflow is achieved when the drum rotates.

Abstract: A closure member (11) for opening and closing an outlet orifice (30) in a stationary cover (32) of a drum (1) drivable in rotation in a processing machine, in which the material being treated is conveyed upwards towards the outlet aperture, which is provided generally at the lower region of the drum. Closure member (11) is movably fitted to the cover (32) and is at least partly closable.

Abstract: A drum mill intended for autogenous or semi-autogenous wet-grinding processes has a screening wall, which is arranged adjacent an end wall provided with a hollow material-discharge trunnion and which separates said end wall from the grinding space, whereat said screening wall has at least one first group of relatively small grate openings through which fine material ground in the mill constantly leaves the grinding space and departs through the discharge trunnion, and at least one second group of relatively large openings through which mixed material, comprising both fine and coarse material, can leave the grinding space. This second group of openings communicates with an individual material outlet via a switching means by which the material mixture passing through said second group of openings can be prevented from leaving the mill.

Abstract: A wet comminuting machine is provided with a sieve which is located at the mill base outlet and has orifices of such dimensions that they block the passage of grinding medium. Opposite the exit surface of the sieve a plate, which can be moved toward the sieve, is provided, on the side facing the sieve, with elements for pushing through the orifices of the sieve, and can be moved manually, pneumatically, hydraulically or electrically by means of a connecting rod. The elements of the movable plate are arranged in alignment with the orifices of the sieve, and are in the form of strips or spikes, depending on the particular design of sieve.

Abstract: In a grinding mill hollow drum structure a novel fastening assembly is provided for securing a discharge lifter between grates and a discharge head portion of the drum structure. The fastening assembly includes a hollow cantilever post having a body and a securing stem portion, being threaded or under tension or conical or the like, that adjoins the body at one end thereof and is accessible from outside the structure to receive a nut for releasably securing and adjusting the post in fixed relation to the discharge head portion. The post, once secured, provides a transverse load bearing capability for supporting the lifter, the wear plates and grates. A retaining structure surrounds the body of the post and cooperates with the discharge lifter to secure the lifter to the body.

Abstract: Discharge cone assembly adapted to be mounted inside a rotary grinding mill or the like is disclosed, in the preferred embodiment, including first and second holders, first and second wearable inserts, first and second cover plates, a wearable nosepiece, and first and second securing plates. The rotary grinding mill includes discharge assemblies having discharge chambers. The ground material from the mill flows into the discharge chambers through grates formed in the discharge assemblies. The holders are permanently mounted in the mill for receiving the wearable inserts. The preferred inserts are captured within the holders by the cover plates and are in ground material communication with the discharge chambers of the discharge assemblies. The nosepiece is in ground material communication with the first and second inserts and provides a unitary outlet therefore.

Abstract: Replaceable liner for the discharge assembly of a rotary grinding mill or the like is disclosed, in the preferred embodiment, as including first, second, and inner most self-supporting box members. The first box member includes closed sides, bottom, and second end, and includes an open top and first end. The second box member includes closed sides, top, and bottom, and includes open ends. When the grate is removed from the first discharge casting, the second box member can be inserted within the first discharge casting and moved into the second and third discharge castings. Then the first box member can be placed within the first discharge casting. Thus, when the grate is attached to the first discharge casting, the first and second box members will be captured within the first and second discharge castings. The inner most box member is provided for installation in the three inner most castings which form the discharge cone of the discharge assembly.

Abstract: This invention is directed to an improved rotary grinding mill such as a ball mill, rod mill or an autogenous mill, having an improved arrangement wherein the usual "overflow" or "grate discharge" arrangements are dispensed with in favor of an annular array of lifter segments providing a diaphragm having a radial clearance from the mill shell, being spaced from the inner surface of the mill head to provide an annular entry slot of restricted opening, with a plurality of lifter blades located therein. The improved mill permits the maintenance of favorable flow gradients within the mill while allowing the carrying of a maximum usable quantity of grinding media, despite increases in mill size that militate against the combination. The discharger provides a sufficient intake area that large throughputs may be accommodated, while avoiding many of the drawbacks associated with grates.

Abstract: Replaceable liner for the discharge assembly of a rotary grinding mill or the like is disclosed, in the preferred embodiment, as including first and second, self-supporting box members. The first box member includes closed sides, bottom, and second end, and includes an open top and first end. The second box member includes closed sides, top, and bottom, and includes open ends. When the grate is removed from the first discharge casting, the second box member can be inserted within the first discharge casting and moved into the second and third discharge castings. Then the first box member can be placed within the first discharge casting. Thus, when the grate is attached to the first discharge casting, the first and second box members will be captured within the first and second discharge castings. Reinforcing members are embedded in the box members for retaining their shape.

Abstract: A partition for a tube grinding mill having inlet openings in an upstream wall thereof and a central discharge opening in a downstream wall thereof, a polygonal envelope formed in said partition defining a central discharge area communicating with said discharge opening and a coaxial reservoir chamber, passages through said envelope connecting said chamber with said discharge area, and scoops defining said passages partially extending in said chamber and partially in said discharge area having a deflector member in said discharge area to divert material towards said discharge opening during rotation of the mill, said scoops being adjustably mounted in different angular positions.

Abstract: A cooled horizontal-axle grinder for the predispersion of solids in liquids, which grinder incorporates a grinding chamber with a double wall for cooling, in which chamber are presented grinding bodies such as balls generally introduced by the treated product intake port and extracted by an outlet in the lower part of the chamber. The grinder is equipped with a circulating pump for the product to be treated which circulates in a continuous manner through the grinding chamber. The rotatable grinder axle carries interchangeable discs or agitator elements interspersed with spacers. The grinder includes a separating sieve designed to retain the grinding balls within the grinding chamber while permitting the finely ground product to flow therethrough to the exterior along the length of and around the axle.

Abstract: A multi-compartment tube mill is disclosed for the grinding of coarse material such as cement clinker in which the tube mill is divided into at least two mill sections each of which includes at least one grinding chamber. An inlet is provided at one end of the tube mill for the coarse material and for ventilating air or gas to ventilate the tube mill and for heat exchange with the material. An outlet is provided at the opposite end of the tube mill for the ground product. Disposed between the two mill sections is a composite diaphragm which defines a separation zone therebetween for removing humidity from the first mill section, and for introducing fresh ventilating air or gas into the second mill section. A method is disclosed for grinding coarse material in the inventive tube mill in which atmospheric conditions are controlled from the inlet to the outlet of the mill.

Abstract: The specification describes a tube mill for the comminution of refuse and her waste materials, consisting of a rotary tube body with an axially arranged material inlet and material outlet in the case of which the tube body is partly filled with grinding bodies. The diameter of the tube mill is two to three and a half times greater than the length of the tube mill with respect to that part of the tube mill, which has a cylindrical tube form, and furthermore the clearance diameter of the inlet opening amounts to at least 25% of the clearance mill housing diameter. Furthermore, the outlet duct is provided at the inner walls with helically arranged baffle surfaces.

Abstract: A tube mill is disclosed for grinding and drying granular material which comprises an elongated shell having one or more grinding chambers, and downstream of the first chamber, a dispersing compartment for receiving hot gases and material and bounded by a sieving diaphragm defining a central opening therethrough. A frustoconical sieve drum is attached to the sieving diaphragm for rotation therewith and forms a portion of an end wall of the discharge compartment.

Abstract: A ball mill including the usual drum and a trommel screen rotatable therewith together with mechanism for returning damaged balls and large pieces of aggregate directly from the trommel screen to the drum. This mechanism comprises a plurality of blades mounted on the inner surface of the cylindrical screen which pick up material in the trommel screen as an incident to rotation thereof and dump it onto a trough which extends from the screen to the drum. A jet of water is introduced into the trough at its outer end and passes the materials back into the drum.

Abstract: A receptacle accommodates a waste paper suspension and a rotor located adjacent one portion of the receptacle wall. A first outlet is provided in the wall in the region of the rotor so that pulp produced by shredding of waste paper by the rotor can be discharged from the receptacle. A strainer is interposed in the first outlet, and a second outlet is provided in an opposite portion of the wall and arranged to discharge matter having low specific gravity from the receptacle.

Abstract: A tube mill for dry grinding of a granular material, the mill being formed with one or more grinding compartments charged with grinding bodies and, downstream of the first or sole grinding compartment, a relatively short compartment bounded downstream by a dam ring having a central opening and upstream by a sieving diaphragm for holding back the grinding bodies, but permitting fluidized ground material to flow from the upstream grinding compartment to the short compartment and vice versa, the short compartment being adapted to serve as a reservoir of fluidized ground material.

Abstract: An air-swept tube mill having at least two grinding chambers and a discharge chamber, an internal by-pass means in the last grinding chamber in communication at one end with the grinding chamber immediately preceding the last grinding chamber and at the other end, with the discharge chamber, whereby material ground in the first chamber is transferred through the by-pass directly to the discharge chamber and oversize material is transferred from the discharge chamber to the last grinding chamber for further grinding. A unique method is disclosed in which grinding of material takes place in a first grinding chamber of a tube mill and by-passed into a discharge chamber. The method further comprises feeding oversize materials from the discharge chamber into a last grinding chamber for additional grinding thereof.