Abstract: A separation device having a housing (10) with a feed conduit (1) and a reject conduit (2), between which conduits (1, 2) and an accept conduit (3) of the housing (10) is a rotor unit (13) having a shaft (4) transverse to the through-flow direction of the separation device, which shaft rotates discs (5) attached to the shaft (4), the outer surface and/or side surfaces of which discs are jagged, i.e. they have protrusions (6) and/or notches and/or these surfaces are substantially rough and the teeth (9) of at least two sieves (7, 8) attached to the housing (10), extend between the discs (5), the first sieve (7) being between the reject conduit (2) and the accept conduit (3) and the second sieve (8) being between the feed conduit (1) and the accept conduit (3).

Abstract: The present invention relates to a turbulence element for use with a rotor and a rotor featuring turbulence elements. The rotor is used in a screening apparatus of the pulp and paper industry. The turbulence element has a longitudinal centerline (CL); two longitudinal edges, a leading edge and a trailing edge; two opposite ends, a first end and a second end; and two surfaces, a top surface and a bottom surface arranged between the leading edge and the trailing edge. The top surface is divided into a leading surface having its origin at the leading edge, and a trailing surface having its origin at the trailing edge. The leading edge and the leading surface are provided with undulations (U).

Abstract: A dewatering device for aggregate product can be used to retro-fit existing aggregate product dewatering facilities in order to more efficiently capture product. The dewatering device can be movable to allow for the portability of the device relative to existing dewatering facilities. The device is adapted to receive a slurry of aggregate product and water and to vibrate to dry the aggregate product. A recycle system is included to receive any fines that may otherwise be lost by the system. The recycle system captures the fines and redirects them back towards the vibrating process of the vibrating device to direct them towards an exit of the vibrating device in order to use said fines as well as the other dewatered aggregate product. The portability of the device allows the device to be used with the existing facilities without the need to completely replace existing components for dewatering aggregate product.

Abstract: A slurry treatment material containing solid particles mixed in liquid is finely pulverized, without using dispersion media, by flowing the treatment material into a vessel and through an annular fine gap formed between an inner wall of the vessel and an outer periphery face of a rotatable body mounted within the vessel. Rotation of the rotatable body subjects the treatment material to compression, expansion and shearing treatments. After passing through the annular fine gap, the treatment material flows into an ultrasonic chamber where it is irradiated with ultrasonic waves that break up and disintegrate agglomerated clumps of solid particles that may be present in the treatment material.

Abstract: A bucket for crushing inert material comprising an outer casing and crushing means arranged in the casing for crushing the material, and additionally comprising a rotating tubular body, rotatable about an axis substantially parallel to a feed direction for the material and disposed upstream with respect to the crushing means in such a way that the material, before being sent to the crushing means, passes inside the rotating body in order to impart to it a rotational movement.

Abstract: The object of the present invention is to provide a manufacturing method of carbonaceous material for a negative electrode of lithium ion capacitors, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium and iron are sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of lithium ion capacitors. The object can be solved by a method for manufacturing a carbonaceous material having an average diameter of 3 to 30 ?m, for a negative electrode of lithium ion capacitors comprising the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 ?m at 500° C. to 1250° C. under an inert gas atmosphere containing a halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by the demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at less than 1100° C. under a non-oxidizing gas atmosphere.

Abstract: In a screening device, a rotor element on a rotor coaxial with a cylindrical screen drum and a cylindrical screen including: an upper surface and a front face between the surface of the rotor and the upper surface, wherein the front face faces upstream into pulp flow through a gap between the screen drum and the cylindrical screen; a trailing surface extending downstream of the pulp flow from the upper surface, wherein the trailing surface tapers to the surface of the rotor and meets the surface of the rotor at a back region of the trailing surface, and opposite sidewalls extending between the trailing surface and the surface of the rotor, wherein the opposite sidewalls gradually converge towards the back region.

Abstract: A mobile collapsible screen and cone crusher combination where the screen is pivoted forward and downward for transport and a rubber hopper is coupled to the fines conveyor so as to permit a hinged connection and a sliding connection between the flexible hopper and the fines conveyor. A plurality of flexible matter edge plates are used at the rear of the flexible hopper to facilitate proper compression and expansion of the flexible hopper. A selectable maintenance catch is used to allow the screen to be elevated to an intermediate height for maintenance.

Abstract: A dewatering device for aggregate products such as sand and gravel to allow dewatering to a moisture within the range of 8% by weight. This energy efficient dewatering system uses an inclined rotatably mounted dewatering screw to initially dewater, followed by an associated vibratory dewatering screen to achieve combined results that neither an inclined dewatering screw or a vibratory screen can achieve separately.

Abstract: An apparatus for separating synthetic materials having different characteristics includes a rotating drum having a cylindrical shape with a tapered end and an opposite flat bottom wall; a device configured to introduce a mixture of at least two synthetic materials in particle form and a liquid having an intermediate specific weight relative to specific weights of the two products into the drum; a radial discharge opening in the tapered end of the drum; an axial slithering discharge opening located in the bottom surface of the drum, at a distance from the drum axis, a rotor located inside the drum having a first external helical blade with the same external shape as the drum, a device configured to set the rotor in rotation relative to the drum. The blade is located at a distance from the rotor axis greater than the distance between the drum axis and the axial discharge opening.

Abstract: The invention is a method and system for screening materials with a tube-shaped screen. The tube that has at least one section with a plurality of screen openings, which are placed in the wall of the tube, and that form a screen frame which defines at least the length and the cross section of the tube, and a screen mesh, that is tensioned on the screen frame, to form at least a part of the wall of the tube-shaped screen. The system further includes at least one ultrasonic converter and at least one feed-line sound conductor placed between the ultrasonic converter and the tube, with the tube being configured, to be subjected to ultrasonic excitation so that the amplitude of the ultrasonic excitation transferred to the tube has a component in a direction perpendicular to, and a component in a direction parallel to, the central axis of the screen.

Abstract: An aggregate washing and classification system incorporates into a water-filled receptacle a sand classifier and one or more rotating augers. The augers are wrapped with screens or perforated walls that are fixed relative to the augers. The size of the perforations may be chosen to selectively sift particular sizes of gravel and rock, and if the perforations increase in size along the length of the augers, either continuously or discontinuously, the material which passes through the perforations will likewise increase in size with greater travel through the auger passageway. Consequently, a set of rock bins may be provided adjacent to the auger outlet, for collecting various sizes of larger aggregate, such as washed rocks. Sand will typically be permitted to pass through the screen perforations near the aggregate inlet. Once outside of the auger and screens, the sand will drop directly into a sand classifier, which is conveniently located directly below the augers and adjacent to the material inlet.

Abstract: An apparatus for screening a fibrous suspension including: a housing, conduits therein at least for fiber suspension being fed, reject and accept, and a rotor and a cylindrical screen drum installed in the housing, at least one of which is rotatable, whereby a surface of the rotor is provided with rotor elements in proximity to the surface of the screen drum, whereby each rotor element includes a front surface facing a flow of the fiber suspension, an upper surface and a trailing surface sloping from the upper surface towards the surface of the rotor, wherein the trailing surface of the rotor element is curved and sidewalls of the trailing surface converge at a back point of the rotor element.

Abstract: An apparatus and method for separating solids from a solids laden drilling mud (14), the method comprising the steps of introducing solids laden drilling mud to a first side of a screen (13), the drilling mud passing through the screen (13) and screened drilling mud located the other side of the screen (13) characterized in that an oscillating tray (18) is located in the drilling mud and spaced from the screen, the oscillating tray imparting motion to the drilling mud to facilitate screening of said solids laden drilling mud in the screen (13).

Abstract: The present invention may be embodied as a rotary screen separator for processing feed material. A separator member defines a longitudinal axis, an input port, an output port, a fine perforation region, and a coarse perforation region. A collector structure defines a fine material output and a coarse material output. A support structure supports the separator member and the collector structure. A drive system rotates the separator member relative to the support structure. Operation of the drive system displaces feed material through the fine perforation region and the coarse perforation region. A first portion of the feed material flows through the separator member to the fine material output in the fine perforation region. A second portion of the feed material flows through the separator member to the coarse material output in the coarse perforation region. A third portion of the feed material flows through the output port.

Abstract: A feed and sorting device for tablets has a number of vertically extending filling tubes for tablets, and a blocking slide unit for temporarily blocking the guiding channels of the filling tubes. The blocking slide unit includes a base plate with through-openings for the filling tubes and a plurality of blocking fingers designed as integral parts of the base plate and horizontally extending into the through-openings. Each blocking finger is assigned to one of the filling tubes.

Abstract: A self-clearing rotary screening system (300, 300?, 300?, 300??) includes a frame (110) having a longitudinally extending axis (112). The frame (110) includes a plurality of longitudinally extending frame members (114) disposed in angularly spaced relationship, one with respect to another, about the axis (112). The system (300, 300?, 300?, 300??) includes a plurality of screening members (116) fixed between respective pairs of the plurality of frame members (114) to define a longitudinally extending cavity (118). A drive system (120) is coupled to the frame (110) for rotating the frame (110) about the axis (112). The system (300, 300?, 300?, 300??) includes a plurality of displaceable members (210, 210?, 310, 410) pivotally coupled to respective portions of the frame (110). The displaceable members (210, 210?, 310, 410) are displaced responsive to rotation of the frame (110) about the axis (112).

Abstract: A material separation system for separating material into different sizes of material. The material separation system includes a support structure, a rotating screen, and a feed plate, to feed the material to the exterior of the rotating screen. The system can be used to separate a desired material from an aggregate material which includes the desired material.

Abstract: An apparatus for screening a fibrous suspension including: a housing, conduits therein at least for fiber suspension being fed, reject and accept, and a rotor and a cylindrical screen drum installed in the housing, at least one of which is rotatable, whereby a surface of the rotor is provided with rotor elements in proximity to the surface of the screen drum, whereby each rotor element includes a front surface facing a flow of the fiber suspension, an upper surface and a trailing surface sloping from the upper surface towards the surface of the rotor, wherein the trailing surface of the rotor element is curved and sidewalls of the trailing surface converge at a back point of the rotor element.

Abstract: An apparatus for separating fibers from reject material produced in the manufacture of recycled pulp. The apparatus comprises a rotating reject cylinder provided with openings, to one end of which the reject material is fed and from the other end of which it is discharged, water nozzles for feeding water to the reject material in the cylinder to separate fibers from it, a collecting basin for recovering water and the fibers separated with it, and discharge channels connected with the collecting basin, and means for discharging fibrous water and light and heavy particles from the collecting basin. The collecting basin is formed of two basin structures at least partly within each other and connected with each other.

Abstract: A papermaking screen device includes a tank for receiving a papermaking material, the tank having an inlet, a refining outlet, a foreign material outlet, a first chamber and a second chamber formed outside the first chamber; a cylindrical screen provided inside the tank and dividing the tank into the first and second chambers so that the first chamber is formed inside the cylindrical screen, and the second chamber is formed outside the cylindrical screen, the cylindrical screen having a cylindrical shape and opening portions on an lateral side of the cylindrical screen; an agitating member provided in the first chamber; and a vibration member contacting the cylindrical screen for vibrating the cylindrical screen in such a range that the cylindrical screen does not contact the agitating member. The inlet and the foreign material outlet face the first chamber, and the refining outlet faces the second chamber.

Abstract: The invention relates to a process for size classifying ammonium sulfate crystals using a screen, said process comprising feeding a feed suspension to the screen, said feed suspension comprising said ammonium sulfate crystals in an ammonium sulfate solution, size classifying the ammonium sulfate crystals, and keeping both sides of the screen immersed in liquid during said size classifying.

Abstract: Apparatus is described for processing articles. It has a hollow drum having permeable walls. At one end there is an inlet for receiving articles onto an inside surface of the permeable walls. At the other end is an outlet for discharging articles from the drum. The drum is rotated about an axis having at least a horizontal component at such speed that centrifugal force acting on the articles is sufficient to overcome the gravity acting on the articles. A first jet of fluid is applied to the articles through the permeable wall, to displace the articles from the inside surface and in a direction away from the inlet, towards the outlet. In one application, the process is used to dry the articles. In another application the process is used to inspect the articles.

Abstract: A pulp sizing screen includes a hollow cylindrical body that defines an axis and an inner space. The cylindrical body includes: a plurality of supporting rings aligned with and spaced apart from each other along the axis, each of the supporting rings being formed with a plurality of angularly displaced notches, each of the notches having a tail section and a head section enlarged in size from the tail section in a radial direction and having a sector shape; and a plurality of slot-defining bars, each of which extends from an endmost one of the supporting rings to the other endmost one of the supporting rings through respective ones of the notches in the supporting rings, and each of which has a middle portion extending through the tail sections of the respective ones of the notches, a first head portion received in the head sections of the respective ones of the notches, and a second head portion disposed in the inner space.

Abstract: The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cylinder, and a second, less coarse pulp mixture is supplied to the second screen cylinder. The pulp mixtures are screened by means of a screen surface of the screen cylinders into accept that passes apertures provided in the screen surface and reject that does not pass the apertures. The accept from the second cylinder is conveyed by means of a guide tube provided between the cylinders towards the inlet end of the first cylinder and it is finally mixed with the first pulp mixture. The accept from the first and the second pulp mixture passes the screen surface of the first screen cylinder.

Abstract: A system for screening fluid-borne material from a fluid that carries particulate matter along with the material, e.g. for screening usable fibers in papermaking or tissue making white water that also contains waste material such as fines and ash. The system employs a flexible and pliable screen to which the fluid is applied. The screen is supported in a suspended manner from a frame. The fluid is directed onto an inside surface defined by the screen, and the location at which the fluid strikes the screen is varied so as to result in bending and flexing of the screen due to the flexibility and pliability of the screen material. In this manner, the configuration of the screen drainage passages is continuously altered, to provide a self-cleaning action that prevents the screen passages from plugging or blinding over. In one form, the screen is generally frustoconical, and the fluid is applied to the inside surface of the screen in a manner which results in rotation of the screen.

Abstract: The present invention provides a drum type refining or washing apparatus in which the refining or washing efficiency of a pulp suspension or a food suspension is remarkably enhanced by the filtration function of a rotary drum and by the filtrate sucking force of a filtrate receptive cell.

Abstract: A pyrolysis plant for refuse and a method for screening solid residues provide a sure and trouble-free sieving of a solid material using a sieving device having a configuration which is as simple as possible. A spiral formed by a rod which is wound in a helicoidal manner, or a plurality of such rods, are provided as the sieving device. The rod or rods can rotate around a longitudinal axis. The solid material is introduced into an interior formed by the rod for sieving, preferably with the assistance of an aligning device for longitudinally extended solid material parts. The spirals include, in particular, a bend so that the lodged solid materials can automatically detach themselves. The sieving device is especially suited for sieving pyrolysis residual material.

Abstract: An arrangement and a rotor for screening of pulp is disclosed that is suitable for the screening of chemical and mechanical pulps, i.e. fiber suspensions of the wood processing industry. A feature of the arrangement and rotor is that inside the rotor (16) there is arranged at least one dilution liquid chamber (24′, 24″, 24′″) restricted by a surface of the rotor (16), which surface is provided with means for connecting said at least one chamber (24′, 24″, 24′″) with the screening space defined between the rotor and the screen drum in such a way that dilution liquid from said at least one chamber (24′, 24″, 24′″) is brought into the screening space at a distance of at least 20 mm from the inner surface of the screen drum (14).

Abstract: Apparatus for separating a fiber suspension is provided including a housing with an upper chamber in the upper portion thereof, a rotor rotatably mounted in the housing, a first rotary screen mounted for rotation with the rotor and dividing the housing into a first screen chamber and a first accept chamber, a second screen radially outward from the rotor defining a second screen chamber, the diameter of the first rotary screen being less than that of the second screen, the first rotary screen being located within the second screen, an inlet, a reject outlet, at least one accept outlet and a stator within the first rotary screen including at least one pulse member for creating a pulse within the first rotary screen, the diameter of the housing being less than the diameter of the second screen and the first rotary screen being separated from the second screen chamber and located at least partially within the second screen chamber.

Abstract: A screen for cleaning a pulp suspension includes a stationary installation in the infeed area between the infeed branch and the free end of the rotor.

Abstract: A system for recovering and recirculating usable fibers contained in papermaking white water. The system employs a flexible and pliable screen to which the papermaking white water is applied. The screen is supported in a suspended manner from a frame. The white water is directed onto an inside surface defined by the screen, and the location at which the white water strikes the screen is varied so as to result in bending and flexing of the screen. In this manner, the screen openings are self-cleaned, to prevent the screen from plugging due to material contained in the white water. In one form, the screen is generally frustoconical, and the white water is applied to the inside surface of the screen in a manner which results in rotation of the screen. The usable fibers are directed toward a discharge opening defined by the lower end of the frustoconical screen, and the waste water passes through the screen and is collected in a waste water collection tank.

Abstract: Pressure screen to remove impurities from a paper fiber suspension that contains impurities. Pressure screen includes a housing having at least one inflow fitting, at least one accept outflow fitting and at least one reject outflow, and at least first and second cylindrical wires located within housing. The at least first and second wires are arranged to be consecutively flowed through by paper fiber suspension, which is introduced into housing through inflow fitting. A first accept, including a portion of paper fiber suspension that passes through first wire, flows toward second wire, and a second accept, including a portion of paper fiber suspension that passes through second wire, flows out of housing through accept outflow. The at least first and second wires are arranged within housing so that paper fiber suspension is fed radially through the at least first and second wires from an inside to an outside.

Abstract: Disclosed is a separator for separating a meltable solid from a mixture with other solids. The separator has a tank for holding a fluid; a container at least partially inside the tank, made at least in part of a screen through which the fluid can pass and melted solids can flow, but through which the unmelted solid material will not flow; and a heater for heating the fluid above the melting point of the meltable solids. Also disclosed is a method of separating a meltable solid from a mixture with other solids. The mixture of solids is placed in the container of the separator and the fluid is heated to a temperature above the melting point of the meltable solid, whereby the meltable solid flows through the screen out of the container, while the other solids remain within the container.

Abstract: A screen for cleaning a pulp suspension including a cylindrical screen basket and a double-conical accept chamber which widens in the flow direction of the pulp suspension.

Abstract: Device for washing gluten, provided with at least one drum screen rotatably supported on a corrosion-resistant shaft, and equipped with means for supplying and discharging washing water and also with means for supplying the material to be treated at the one drum end and removing the treated gluten at the other drum end, at least two sets of spoke-type elements which are made of corrosion-resistant material and which support the circumferential wall of the drum screen being provided on the drum shaft at points disposed at a distance from one another in the longitudinal direction, which sets are each mounted, when viewed in the circumferential direction, on a bush which is made up of at least two parts made of corrosion-resistant material and attached to one another by flanges and which is to be firmly clamped to the shaft, the shaft being made of steel which is not corrosion-resistant and which has a high modulus of elasticity, and lining sleeves made of corrosion-resistant material being provided around the s

Abstract: A method and centrifugal separator apparatus for separating more dense particles from less dense particles contained in a slurry. The separator apparatus receives slurry into a rotor assembly which includes a bowl open upwardly and a surrounding hutch chamber. The bowl has a lower impermeable portion coupled to a drive shaft for rotating the rotor assembly, an upper impermeable portion connected to the lower portion, and a frusto-conical screen. The frusto-conical screen forms the inner wall of the hutch chamber and discharge outlets are provided in the periphery of the hutch chamber. An annular fluid inlet connected to the hutch chamber supplies elutriation liquid continuously to the interior of the hutch chamber, and a plurality of pulse blocks supply intermittent pulses of liquid to the hutch chamber. A dam is formed at the top of the screen. In operation, slurry is supplied to the lower portion of the bowl and forms a bed on the screen.

Abstract: A method and apparatus for efficiently separating solids from liquid/solid slurries are disclosed. The slurry to be separated is retainably placed within a container having one or more lift paddles secured within its inner cavity. The container is supported for rotation about an axis and has drive means for slowly rotating the container. As the container rotates, the lift paddles lift a portion of the retained slurry, allowing the liquid portion to fall back into the primary slurry pool to be separated, and lifting coarse solids toward the top of the rotation path of the paddles. The separated solids slide by gravity from the lift paddles as they approach the top of their rotation paths and into a collection tray. A filter that rotates with the container filters fine solids from the liquid portion of the slurry and also deposits the fine solids on the collection tray. The filtered liquids can be readily pumped from or recirculated to the separator.

Abstract: In order to recover the various components of multiple layer materials, a method uses a refiner or disperser including mutually opposing rotating discs having material engaging surfaces or elements such as teeth. The method includes: adjusting a gap between the discs so that a material is subjected to a shear force that mutually separates its material layers in the form of pieces or fragments in the absence of any substantial disintegration of the layers; pumping the separated pieces of the various layers together with a supplied suspension liquid to a separator; and, separating readily pulped or slushed pieces of the material suspended in the suspension liquid from pieces of the suspended material that are not readily pulped or slushed. The pumping of the separated pieces and suspension liquid to the separator can be via a collection vessel.

Abstract: A casing has a pulp slurry inlet, a reject outlet and an accept stock outlet and accommodates a rotor. The rotor has a hollow cylinder with scraper blades at its outer periphery. A screen plate is disposed outside of the scraper blades to provide between them a passage facing to the screen plate. The hollow cylinder is formed with pulp slurry outlets. Rotation of the hollow cylinder causes the pulp slurry to be circulated outside and inside of the hollow cylinder, so that separation of the pulp slurry into accept stock and reject is repeatedly carried out by the screen plate.

Abstract: Pressure screening apparatus for screening a suspension of papermaking stock employing an enclosing housing and a cylindrical screen, with a drum type rotor, has the screen divided or formed with axially spaced annular screening zones and a corresponding number of annular reject collection areas, one for each screening zone. The collection areas are positioned so as to receive rejects from one of the screening zones only, while a rotor is formed with outlet openings that apply stock suspension to selected ones of the screening zones so that there is no mixing of rejects between screening zones, and each screening zone receives stock suspension for screening independently of the other screening zones.

Abstract: The invention provides an apparatus for screening a fibrous slurry including a rotatable drum whose circumferential wall includes a screen. The screen has spaced openings with longitudinal axes or elongations which are large relative to the transverse axes or gaps defined by the openings. The openings are disposed with their longitudinal axes extending circumferentially of the rotatable drum. The drum has at least one open end. A slurry delivery conveyor terminates adjacent to the drum for delivery of slurry within the drum.

Abstract: A method for filtering out particles from a fluid is disclosed, wherein unfiltered fluid is guided into a filter housing of a filter apparatus and filtered fluid is guided from the filter housing, and wherein a rotary filter element, which has a filter structure and is arranged in the filter housing and is rotatable about an axis thereof, is rotated at a speed which is sufficiently high that all particles passing in a fluid flow into the area of the rotary filter element are affected by its structure and are ejected therefrom, whereas the fluid passes the structure of the rotary filter element substantially freed from the particles and flows off from the filter housing.

Abstract: The present invention relates to an apparatus and a process for screening a fibre suspension such as papermaking stock in a pressurized screen especially in connection with pumping the liquid. The invention also relates to the use of the apparatus in a process for the production of paper or board. The apparatus comprises a generally tubular housing (12) and a perforated screen-drum (22) inside the housing. The housing (12) and screen-drum (22) define between themselves a generally annular screening zone (30). The screen-drum (22) surrounds a tubular accept channel (32). The apparatus further comprises a stock inlet (14), outlet (19) for accept, and outlet (17) for reject. The screen-drum (22) is rotatable within the housing (12) and conducts are provided for introducing diluting fluid into the annular screening zone (30) at a plurality of locations along its axial extent.

Abstract: A device comprising two coaxial drums (22, 24) is proposed in order to separate and then proportion objects of different sizes. The objects are introduced into one end of the inner drum consisted mainly of a coil (32) wound in a spiral. Large objects are retained in this inner drum and are routed when in rotation. Small objects drop into the outer drum (24) and are routed to its other end when it is driven in rotation. Small objects drop into the outer drum (24) and are routed to its other end through a spiral inner header (50) when it is driven in rotation. Thus objects such as hulls and end pieces obtained after cutting irradiated nuclear fuel assemblies can be separated and then proportioned.

Abstract: A drum separator for separating brine shrimp eggs from a slurry containing an agglomeration of adult brine shrimp, brine shrimp eggs and debris includes a fluid source to maintain a slurry. The fluid source may be an internal spray jet disposed to spray against the slurry inside the drum for breaking up the agglomeration of adult brine shrimp, brine shrimp eggs and debris so that the brine shrimp eggs may pass through openings formed in the drum. An external spray jet is disposed to spray against the exterior surface of the drum for cleaning the adult brine shrimp and debris out of the openings in the drum. The internal spray jet is preferably an elongated pipe having a plurality of openings and is disposed inside the rotating drum. The external spray jet is preferably an elongated pipe with a plurality of openings and is disposed along the exterior of the rotating drum.

Abstract: A method and apparatus for efficiently separating solids from liquid/solid slurries are disclosed. The slurry to be separated is retainably placed within a container having one or more lift paddles secured within its inner cavity. The container is supported for rotation about an axis and has drive means for slowly rotating the container. As the container rotates, the lift paddles lift a portion of the retained slurry, allowing the liquid portion to fall back into the primary slurry pool to be separated, and lifting the solids toward the top of the rotation path of the paddles. The separated solids slide by gravity off of the lift paddles as they approach the top of their rotation paths and into a collection hopper and transport means that carry them away from the container. The liquids returned to the primary retained slurry within the container assist in washing the slurry for facilitating solids separation without required increase in the retained slurry volume.

Abstract: A discrete material washing apparatus comprises a structure mounting an elongate trough having an inlet and an outlet. A dished tray is mounted on the structure and shaped to feed into the inlet. The tray is to receive disposal of a cementitious mixture therein. A cylindrical screen has a net surface. The screen extends substantially along the length of the trough and is adapted for rotation. Water spray is provided to play on any mixture disposed onto the tray and passed through the inlet into the interior of the screen for size classification with smaller particles able to pass through the mesh of the screen surface into the trough and larger particles remaining in the screen. A first mechanism is provided to remove the smaller particles from the trough, and a second mechanism is provided to remove the larger particles from the interior of the screen through the outlet of the trough. A weir is provided in at least one longitudinal side of the trough for removal of the cementitious water therefrom.

Abstract: A fractionator for fractioning a suspension in at least two fractions, including a drum rotatable about a substantially horizontal access and having axially spaced end walls, a centrally arranged inlet for suspension, a flow channel for suspension in the drum, and outlets for fractions. The flow channel extends from the inlet back and forth between the end walls of the drum and radially outwards towards an outlet for the at least two fractions. Preferably the flow channel is defined by substantially concentric cylindrical walls of which every second wall is alternatively tightly connected to one or the other of the two end walls. The fractionator is useful in a continuous fractioning process.

Abstract: A rotary screening device is disclosed which includes a rotating cylinder having an inlet end, an outlet end and a cylindrical wall formed at least partly from the screening surface. The cylinder is rotatably supported on wheels which are in turn mounted within a trough-shaped spray shield having sides formed from a single unitary blank of metal, and which extends about the lower radial surfaces of the cylinder wall, functioning as the screening device frame.