Abstract: The invention relates to a device for determining particle size distribution in a bulk material, such as milled or grinded grain for animal feed. The device comprises an inlet for receiving at least a portion of the bulk material, a sorting mechanism for sorting the received bulk material. Said sorting mechanism comprises at least a first sorting device for sorting said received bulk material into at least two sorted partitions wherein the sorting device are capable of sorting different particle sizes and said at least two sorted partitions have different particle sizes.

Abstract: A method and apparatus for direct drying of inorganic sludge with a drum drawing process, comprising the following steps: 1) drum mixed drying of slag and sludge: respectively conveying the slag and sludge into a drum (1) in proportion, completing mixing, heat exchange, dehydration, cooling and crushing of the slag and sludge under the rolling action of the drum (1) and a steel ball to achieve cooling, crushing and drying of the slag and sludge, and directly discharging the obtained mixture; 2) slag and sludge separation: separating the steel slag and dry sludge in a manner of combining screening and rotary separation; 3) tail gas treatment: treating dusts, sulfides and organic compounds in tail gas generated by the dry sludge by using wet alkali washing and activated carbon adsorption, and discharging the treated tail gas; and 4) tailing sludge treatment: generating steam and dusts in the drum treatment of the slag and sludge, allowing dusts to enter a tail gas treatment device (4) with steam, aggregating th

Abstract: A system for grinding material in a material flow through the system may include a feed hopper having an interior for receiving material to be processed, a feed apparatus configured to receive material of the material flow from the feed hopper and control a feed rate of the material moving through the system, a roller mill apparatus configured to grind material of the material flow passing through the roller mill apparatus, and a classifier apparatus configured to remove portions of the material from the material flow.

Abstract: A system for processing a supply of post-consumer scrap linear low density or low density polyethylene film into near-virgin quality blown film product. The system includes tearing the supply of film in a shredder, wherein the surface area of the film is exposed, including delaminating the film. The torn supply of film is washed in a hot water bath including a surfactant. The film is agitated in the bath containing the surfactant wherein contaminants on the film are removed from the film. The washed film is ground into smaller pieces and additional washing of the ground film in a rotating friction washer occurs wherein additional contaminants are removed from the film. The ground film is then dried in a dryer and compacted in a compactor without addition of water into granulated objects of near-virgin quality blown film product.

Abstract: A meat grinding reclamation system is disclosed herein. The system uses a conical feed screw. The conical feed screw is provided with a shaft and two flights. The first flight changes from a constant diameter to an expanding diameter. The second flight is provided co-helically along the shaft with a portion of the first flight. As both flights expand in diameter, meat processed through the meat grinding reclamation system accelerates, dislodging undesirable material such as gristle from the meat, before the meat decreases in velocity to present the meat for further processing.

Abstract: Fibrous materials, compositions that include fibrous materials, and uses of the fibrous materials and compositions are disclosed. For example, the fibrous materials can be operated on by a microorganism to produce ethanol or a by-product, such as a protein or lignin.

Abstract: A system for processing a supply of post consumer scrap linear low density or low density polyethylene film into near-virgin quality blown film product. The system includes tearing the supply of film in a shredder, wherein the surface area of the film is exposed, including delaminating the film. The torn supply of film is washed in a water bath including a surfactant. The film is agitated in the bath containing the surfactant wherein contaminants on the film are removed from the film. The washed film is ground into smaller pieces and additional washing of the ground film in a rotating friction washer occurs wherein additional contaminants are removed from the film. The ground film is then dried in a dryer and compacted in a compactor without addition of water into granulated objects of near-virgin quality blown film product.

Abstract: A coffee grinder includes a machine base, in which a crushing unit, a separating unit, and a grinding unit are provided. The machine base has an inlet and an outlet, and the crushing unit is under the inlet to crush coffee beans into parchments and beans. The separating unit has a rotary member and a collection container that the rotary member provides an air flow to send the parchments to the collection container. The grinding unit is between the crushing unit and the outlet to grind the beans from the separating unit and send the ground beans to the outlet. The present invention crush the coffee beans to separate the parchments and the beans, and the parchments are removed by the separating unit. Next, the beans will be ground.

Abstract: A method and system for processing biomass material from harvest to pelletizing includes a continuous shredding stage and grinding stage to reduce the size of the material. A fan pulls air through the shredder and the grinder to assist the movement of the biomass material through the shredder and the grinder. Due to the light weight of the biomass material, the material is transported between the shredding and grinding stages mechanically and pneumatically by a combination auger with air assist. The biomass material may include agricultural residues, such as corn stover. The process and equipment eliminates or minimizes damage to the carbohydrates in the biomass so as to maintain pre-grinding cellulose and hemi-cellulose levels.

Abstract: The present invention relates to a process for the production of granules from a liquid composition with a decreased dust production, the process steps are as follows: applying the liquid composition onto solid particles that are kept in a continuous movement by a gas stream in a granulation zone of an oblong granulator, thereby depositing and solidifying liquid composition around the solid particles to increase the size of the particles and thereby form grown solid particles; discharging a stream of the grown solid particles from the granulation zone, dividing, in a size-sorting apparatus, the stream of grown solid particles into individual streams based on the size of the grown solid particles to thereby produce streams of undersized, oversized, and desired-sized grown solid particles; transferring the stream of oversized grown solid particles to a size-reducing apparatus; crushing the stream of oversized grown solid particles in the size-reducing apparatus, thereby reducing the particle size of the oversiz

Abstract: Systems and methods for processing and sorting a municipal solid waste stream are described herein. A system can include a processing sub-system configured to receive a municipal solid waste stream and to remove the non-processable waste, a processing apparatus configured and disposed to receive constituents of the municipal solid waste stream from the processing sub-system and reduce the size of the constituents of the waste stream to an average particle size of less than about ¾ inch, and separators configured to sort the waste stream into constituents based on density.

Abstract: Material to be processed, such as sludge, is deposited into the trough having an auger operating at a rotational speed and direction so as to force the material received within the trough upstream against a rigid surface for breaking up the sludge. A cutting fluid is added to the trough for diluting the sludge and enhancing a flow of the broken up sludge downstream under a force of gravity, allowing the sludge to enter a chopper, where it is chopped to a desired consistency before being pumped to a desired location. The diluted sludge may be filtered prior to chopping. A hopper and cutter may be used to receive the unprocessed sludge for cutting prior to being deposited into the trough. As a result, sludge in ranges from soft to hard states is converted to a fluid form capable of being pumped.

Abstract: A rotary tumbler metal reclaimer includes an inner cylinder and a concentric outer cylinder that rotate simultaneously. The inner cylinder includes a first compartment that intakes material for breaking by teeth, a second compartment that receives broken material from the first compartment and crushes the material into smaller particles, and a third compartment wherein particulate material enters the space between the inner cylinder and the outer cylinder by attrition through perforated screens. The second compartment includes a crusher having various features for crushing lump material as it rotates. The third compartment provides further breakage and conveyance of particulate material. Particulate material then returns proximate the intake for screening into fine and coarse sizes and then collecting for reuse. Metallics and metallic oxides exit the tumbler through apertures in the rear of the third compartment for collection.

Abstract: A trash harvester apparatus and method includes a trash grabber. At least one trash shredder for shredding trash from the trash grabber is connected with the trash grabber. A magnetic device for picking magnetic trash from the trash is provided where the magnetic device is connected with a first receptacle for containing the magnetic trash. An auger device for moving non-magnetic trash is provided where the auger device is connected with a second receptacle for containing the non-magnetic trash.

Abstract: Crushed rock is produced by passing rocks through an early stage rock crusher. Crushed rocks that exit the early stage rock crusher are passed across a sizing device. Rocks failing to pass completely through the sizing device are recrushed in a later-stage rock crusher and then passed downwardly through a high-volume air stream which flows within the crusher transversely through the downwardly traveling crushed rocks and extracts fines therefrom prior to exiting of the crushed rocks from the crusher. The fines extracted by the air stream are at least 50% minus 50-mesh.

Abstract: Method for comminuting and cleaning waste plastic, in particular, mixed plastic (MKS) with the following steps: a compacted material, especially, an agglomerate is produced from film scraps or film remnants comminuted into flakes and/or thick-walled plastic parts chopped up into chips, the compacted material is introduced into a disc or drum refiner and is ground therein in the presence of water, wherein the portion of compacted material of the goods located in the refiner amounts to at least 10 percent by weight, a fine grain fraction is removed from the ground stock exiting from the refiner, the remaining ground stock is washed and either mechanically dewatered and dried, or pulverized again in a further refiner stage in the presence of water, and subsequently dewatered and dried.

Abstract: Systems and methods for receiving used asphalt materials, heating the materials, dynamically tumbling the materials into a recycled granulized form, and selectively providing the recycled asphalt for use. An asphalt recycling system is used that is configured to receive used asphalt materials, including RAP and asphalt chunks. Inside the system, the asphalt materials are heated in a heating chamber, such as by natural gas, propane, or another heat source. The heating chamber warms the metal in the chute, and material in the chute can be exposed to exhaust gas, which preheats the asphalt material. The material is then delivered through the chute and onto a conveyer belt, which drops down into a rotating drum. The drum includes a material classifier ring and a plurality of paddles that are used to tumble the heated asphalt material until it becomes generally granularized. The drum can be manipulated (e.g., tilted, etc.

Abstract: The invention provides a method and installation for processing heterogeneous value bearing material by pressure comminution. The material is compressed in a bed of particles, at low pressures and at low bulk material densities, and preferably no more than is necessary to liberate the desired values, thereby to minimise the formation of fines. The compressive bed pressure applied to the material does not exceed 300 MPa, and the process is preferably operated in an open circuit mode. Surprisingly, these measures lead to enhanced liberation of values compared with conventional comminution techniques.

Abstract: Device for milling food products, including two separate milling passages and a sifting member (18, 19) interposed between the two milling passages. The sifting member (18, 19) includes a rotating member (18) which affects the product that leaves the first milling passage so as to propel it against a screening surface (19). The apparatus uses a plurality of devices and the method uses the device.

Abstract: A cylindrical vessel has a drive shaft rotatably mounted therein and extending along substantially the entire longitudinal extent thereof. This drive shaft is rotatably driven by a motor at a speed of 3,000-10,000 rpm. The output of a roller mill or the like having particles of the order of -200 mesh to be further comminuted, which may be of coal or other minerals, are fed into the vessel. Connected to the shaft and rotatably driven therewith is a centrifugal compressor fan. This fan with additional air intake to the vessel provides a high velocity air curtain which suspends the particles and drives them upwardly. Mounted above the compressor and rotatably driven by the drive shaft are a plurality of semipermeable screens which comminute the particles to bring them to a superfine state. Particles which are not comminuted to a superfine state are repelled by the screens for further comminution.

Abstract: A needle destruction device has a main frame, a lateral plate, a motor, a motor shaft extending from the motor, a drive gear connected to the motor shaft, a follower gear engaging with the drive gear, a first upper roller, a second upper roller, a first lower roller, a second lower roller, a first upper shaft extending from the first upper roller, a first upper driven gear connected to the first upper shaft, a second upper shaft extending from the second upper roller, a second upper driven gear connected to the second upper shaft, a first lower shaft extending from the first lower roller, a first lower driven gear connected to the first lower shaft, a second lower shaft extending from the second lower roller, a second lower driven gear connected to the second lower shaft, the first upper driven gear engaging with the follower gear and the second upper driven gear, the first lower driven gear engaging with the follower gear and the second lower driven gear.

Abstract: A toner producing system which can efficiently produce toner having a sharp particle size distribution by suppressing the occurrence of microscopic powders and improve energy efficiency in pulverization. The system is furnished with a second pulverizing apparatus having a second colliding plate inclined at an angle in a range between 45.degree. and 90.degree. inclusive with respect to a direction in which a raw material subject to pulverization is introduced into a second pulverizing chamber through a second nozzle, and a third pulverizing apparatus having a third colliding plate with a conical member being placed thereon, so that the raw material introduced into a third pulverizing chamber through a third nozzle collides with an inner surface thereof following the collision with the third colliding plate.

Abstract: A grinding apparatus includes a roller mill in which material particles are pre-ground, a tube mill connected to the roller mill through a fluidized-bed-type classifying device in which the material particles are classified by size and a circulation line is connected between the classifying device and the roller mill, wherein a fluidized portion of the pre-ground particles, which consists of a fine material component is fed into a tube mill, a remaining portion of the pre-ground particles, which consists of course material and some amount of fine material not fed into the tube mill is returned to the roller mill through the circulation line where the remaining portion of the pre-ground particles is again crushed together with newly fed material particles in the roller mill.

Abstract: For preparing plastic waste composed of different plastics, possibly combined with other materials, for further processing, for example, as additives for construction. A method of the invention comminutes the waste, metals are separated out, the plastic waste is agglomerated, and the agglomerated waste is comminuted further. A device according to the invention for performing the method uses comminution devices, metal separators, and at least one agglomerator. The entire device is completely mobile and equipped with its own power supply.

Abstract: A two stage hammer mill which reduces recycled glass and its associated contaminants to small glass particles in the 100-800 grit size range and waste. The glass grinder is of light weight, modular construction, such that it may be taken apart, relocated, and restored to operation quickly and easily. A modular design also allows it to be easily cleaned and reconfigured to produce aggregate of selectable size. Located on separate rotors, installed in separate grinding chambers, the two hammer mills are spaced apart from one another and mounted within a common housing. The first stage provides a relatively coarse reduction of the material flow, which then passes into the secondary grinding chamber where the material is further ground. The design of the hammers in this hammer mill are such that they entrain a large quantity of air, accelerate it to high velocity, and drive the mixture of air and material through the system, entraining small, medium and large sized particles.

Abstract: A system for separating and packaging carpet forming fibrous material and backing material from carpet pieces for recycling. The system comprises a shredding apparatus for separating carpet pieces into substantially even sized small pieces of between two inches by two inches and four inches by four inches. These pieces are passed to a granulating apparatus which slices them into smaller pieces of between one-quarter inch and one-half inch which causes the fibrous material and backing material to begin to separate. A surge apparatus receives the partially separated materials and delivers them in an even manner to an elutriator. The elutriator using an upper air delivery system for carrying off the fibrous material and a lower air delivery system for carrying off the backing material delivers the separated materials to storage apparatus which readies the separated materials for recycling.

Abstract: An apparatus and method for crushing clay to reduce the size of the clay to a uniform particle size distribution without generating a substantial percentage of undersized particles. Oversized clay particles are fed to a first roller mill between a first pair of counter-rotating, adjacent, grooved rollers. The particles exiting the first roller mill that have the desired particle size distribution are separated from the undersized and oversized clay particles exiting the first roller mill, prior to crushing the oversized particles in a second roller mill. The oversized particles from the first roller mill then are fed to the second roller mill between a second pair of counter-rotating, adjacent rollers that are separated by a roller gap that is smaller than a roller gap of the first roller mill.

Abstract: A disc hog for reducing timbers to wood chips and shards of a predetermined maximum size comprises a housing defining a disc-shaped interior cavity and a heavy metal disc disposed in the cavity and mounted for rapid rotation about its central axis. A feeder opening is formed in the housing and a chute is positioned to facilitate the feeding of timbers through the opening for presentation to the front surface of the rotating disc. Both the front surface and the rear surface of the rotating disc is studded with hammer blocks that protrude outwardly from the surface. The hammer blocks on the front surface are sized and configured to impact, tear apart, and shred a timber fed to the disc into wood chips and shards. The hammer blocks on the rear surface of the disc are sized and configured to reduce wood shards and chips to shards of smaller size.

Abstract: The invention relates to a grinding plant and to a method of grinding and classifying brittle material for grinding, in which two classifiers are used. The finer fraction from the first classifier is delivered to a second classifier which separates it into coarse material and fine material. The coarse material passes into a fine grinding mill and from there is conveyed back to the second classifier by way of a mechanically transporting conveyor arrangement.

Abstract: An apparatus for reducing and separating a mixed makeup of material in which a principal mill for grinding, ripping and tearing the subject material is provided with a magnetic separator for extracting the magnetic fractions from the non-magnetic fractions and separately discharging the magnetic fractions which are separately collected from the non-magnetic material. The apparatus may employ a preliminary material reducing unit to reduce the material to a suitable size for processing in the principal mill, as this feature is useful to reduce such bulky material as vehicle tires which are the usual source of magnetic material that needs to be separated out.

Abstract: A mobile crushing plant is described which was developed for processing concrete or masonry waste and includes a trailer with a primary crusher mounted on the trailer. The crusher has an inlet and an outlet. A screening assembly is mounted on the trailer. The screening assembly has a screen disposed at an angle such that pieces of waste material too large to pass through the screen roll down the angled screen to a drop off area. A first conveyor extends from the outlet of the primary crusher to above the screen, whereby crushed pieces of waste material exiting through the outlet of the primary crusher are conveyed to the screen. A second conveyor extends from the drop off area adjacent the screen to the inlet of the primary crusher, whereby pieces of waste material too large to pass through the screen are reprocessed through the primary crusher.

Abstract: An improved process for the mechanical separation of complex, intergrown ores containing mineral of at least one of lead or zinc comprises a differential flotation process followed by an agglomeration process. The improved separation process is useful for bulk separation of mixed, intergrown minerals or for separation of one mineral from another, e.g., separation of lead-containing mineral from zinc-containing mineral.

Abstract: An installation for crushing vehicle tires and the like and for separating the metal parts from the nonmetal parts comprises in combination: a first crusher unit (1); a first screening assembly (27) associated with said first crusher unit (1), to divide the granules into at least two groups, depending on their size; a separation section (35) to separate the metallic material from the larger granules originating from said first screening assembly (27) and to recirculate the nonmetallic material; a second crusher unit (71) which receives the granules of smaller size originating from the first screening assembly and the granules of nonmetallic material originating from said separation section (35); and downstream from said second crusher unit, a first separator means (83) to separate the metal parts from the nonmetal parts.

Abstract: An apparatus is described for reprocessing, i.e. disintegrating, used packing materials, for example unsorted domestic waste paper. The apparatus consists essentially of a first comminuting aggregate (14), a following trough-like housing (2) with agitating mechanism (4, 6) rotating therein and a further comminuting aggregate (18) arranged in the material exit well (16). The apparatus is further provided at its lower end with a heavy trash collecting chamber (26). The comminuting aggregates (14 and 18) are replaceable and depending upon the working requirements selection is possible between purely cutting, more chopping or also disintegrating tools. The first comminuting aggregate (14) serves to comminute the largely sheet-like raw material to a conveyable piece size while the second comminuting aggregate (18) serves essentially for fine comminution and disintegration of the material.

Abstract: A two-stage procedure is disclosed for sorting wood chips. The chips are directed to a gyratory screen in the first stage and to a disc screen in the second stage. The chip flow is divided in the first stage into four fractions of which the first fraction contains mainly oversized chips and is directed to a pin chipper, from which it emerges as suitable-sized chips and is directed back to the gyratory screen of the first stage. The second fraction contains acceptable sized chips and most of the overthick chips and is directed to the second or thickness screening stage. The third fraction consists mainly of acceptable chips and is directed to a pulping process, while the fourth fraction consists mainly of fine particles and is directed to a burning station.

Abstract: The invention relates to a method and a grinding plant for reduction of brittle material for grinding, in which material which has undergone primary reduction from a first grinding stage is delivered as fresh material to the second mill of a second grinding stage and finished product is removed from this second grinding stage, and in which the quantity of feed material of this second mill is kept constant when the quantity of finished product alters by altering the quantity of fresh material. This first grinding stage contains an air separator from which the fines are fed as fresh material to the second mill. In the event of alteration in the quantity of fresh material for the second grinding stage the quantity is kept constant by corresponding alteration of the fineness of separation of the separator of the first grinding stage.

Abstract: A process for recovering elemental sulfur from volcanic and non-volcanic ores is disclosed. Ore is processed by crushing the ore to a coarse particle size autoclaving to separate the sulfur from the ore, mild grinding to selectively reduce the size of the liberated sulfur particles, flotation and sulfur separation/filtration steps to produce a sulfur of at least 99% purity. The process recovers at least 90% of the elemental sulfur contained in the ore. The particular crushing of the ore and selective grinding techniques for reducing sulfur particles for reducing sulfur particles size are important factors in the efficiency of the process since the grinding techniques inhibit the formation of fine gangue which is difficult to separate from the liberated sulfur.

Abstract: Apparatus is disclosed for reducing the particle size of various materials (e.g., grains, forage materials, fibrous materials, bulk materials, disposed materials, etc.). The apparatus includes a housing including a circular interior wall, a rotor member which is rotatably mounted in the housing, a plurality of blades or hammers attached at one end to the periphery of the rotor, drive means for driving the rotor within the housing, and feed means for feeding the material to the rotor in substantially full face feed. An annular channel or chamber is defined between the rotor and the interior wall of the housing. The blade members extend into the channel or chamber. After the material has been reduced in particle size by the blades or hammers it passes into a cavity adjacent to the annular channel or chamber and the rotor. The cavity includes an unrestricted discharge opening for exit of the processed material.

Abstract: The invention comprises a method and apparatus for recycling foamed polystyrene from municipal solid waste and more particularly, from fast food restaurant waste. A steady stream of waste is delivered to a flail mill for reducing particle size, a rotary trommel for eliminating undersized waste and a rotary air classifier for removing "heavy" waste from the stream. At this point, the waste stream comprises mostly paper and foamed polystyrene. The paper and foamed polystyrene are delivered to a water pulper which fiberizes the paper so that it can then be separated from the foamed polystyrene by passing it through a screen of selected mesh size to allow the water and paper pulp to pass through while retaining the foamed polystyrene.

Abstract: A device for grinding and separating grains, in particular for grinding malt, consisting of at least two roll packages (4, 5, 6) in the form of, with respect to their forces, self-contained units arranged vertically above each other on load-bearing columns (2) of a machine housing (3), and of a pair of screen units (7, 8) oscillating above the lowermost roll package (6) in opposite direction in a horizontal plane and thus with little vibration with respect to the overall device. The screen units are articulated on the machine housing (3) by relatively short levers (27', 29, 31', 33) into which the drive forces for the vibratory equipment are introduced from the center of the machine in such a manner that all rotating parts of the drive (9) are located outside the dusty screen space.

Abstract: A grain grinding system includes a polishing machine for polishing grains, and roll mills and sifters for repeatedly mill and sift the polished grains to provide a flour having a desired mesh size. A moisture adding device is provided for adding moisture to the grains milled in at least one of the roll mills, thereby maintaining the grains in a suitably moistened condition during the milling operation.

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: In the case of a composter comprising a drum supported for rotation about a level longitudinal axis thereof, means for driving said drum about said axis, said drum including a peripheral casing which is at least partly in the form of perforated sheet metal panels, a longitudinal conveying device fitted under said drum and able to be driven selectively in opposite directions for selective conveying of compost falling from said drum to a compost deposit and a lifting conveying device arranged at one end of said drum, a charging device arranged in an upper part of the drum for cooperation with the lifting conveyor, the aim of the invention is to ensure the most even distribution of the coarse material along the length of the drum while nevertheless keeping to a simple design of the composter and ease of operation.

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 system of processing baled secondary fibre furnish is provided. The system includes the steps of breaking the baled furnish, dry screening the furnish to remove abrasive contaminants, and then repulping the dry screened furnish.

Abstract: A bone chip removal and ground meat separating unit for use with a meat grinding apparatus having at least one further meat processing unit downstream thereof and wherein the grinding apparatus includes a casing with a centrally apertured end cap secured thereto for holding a centrally hubbed, perforated die plate with at least one bone chip discharge channel extending through the hub, and including a ground meat discharge conduit having an entrance end adapted to be secured to the end cap for receiving ground meat extruded through the perforations, and a bone chip removal tube having one end adapted to be secured to the hub for receiving bone chips discharged through the channel and another end communicating with an exit opening in the conduit downstream of the entrance end for discharging bone chips out of the stream of ground meat being conveyed through the conduit with a valve in the tube for regulating the flow of bone chips therethrough.

Abstract: A method and an apparatus for breaking into parts of a certain size and screening a bulk material, in which the bulk material is fed onto a flat grid (49) made to vibrate, the type and intensity of this vibration being chosen in a manner such that the large lumps of at least one type of material which do not pass directly through the openings in the grid are broken on the said grid, as a result of the said vibration movement, into fragments having a size which permits these fragments to pass through the openings in the grid. Preferably the material passing through the grid is collected on at least one screen (58, 59, 60) which is made to vibrate together with the grid and the material moving over this screen which has not fallen through is conveyed through a reduction device at the discharge of the screen, which device is formed by at least one breaker roller (64) having a double action and which can be made to rotate.

Abstract: For reducing the specific energy outlay in the grinding-drying of damp initial material, a circulating grinding system including a comminution machine, particularly an impact hammer, which is followed, via a sifter, by a high-pressure roll press operated in accord with the principle of product bed comminution, whereby the product admission of an impact hammer mill is connected to the feed for fresh initial material and the product discharge of a roll press is in communication with a product admission and/or with a product discharge of an impact hammer mill.

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 paper pulp refiner for refining high consistency stock characterized by two virtually identical refining zones connected in series which have an interstage device to remove excess steam and whose axial loads can be varied independently thus producing two stage pump from a single refiner.