Abstract: Solid waste incinerator fuel is preclassified by passing it through a hollow rotating cylindrical drum which has two sets of extensions from the wall going lengthwise along the length of the drum, the first set toward one end and the second toward the other, the second set being shorter or smaller-sized than the first and the first preferably having rodlike projections which may have at least partly knifelike or bladelike ends or edges at the axial or inner ends thereof. The first set of extensions homogenizes the incoming waste by lifting, dropping, churning, and ripping it as well as fluffing it. The second set of extensions, preferably angled, lifts smaller sized heavier, non-combustible particles to the upper part of the drum from which they are removed at the exit end. The lighter material, mostly combustibles such as paper, textiles and wood, for example, is discharged toward the bottom of the exit end of the drum.

Abstract: A mixing apparatus for dry or wet ingredients is disclosed, which comprises an upwardly inclined trackway, and a mixing container mounted for rolling movement along the trackway. The trackway includes a scale at the lower end which permits the container and its contents to be weighed, and so that predetermined amounts of a number of ingredients may be loaded into the container. A power system is provided for pulling the container upwardly along the trackway, and such that the container is subjected to a rotary motion for mixing the ingredients, and a simultaneous linear transport to an elevated position. The container includes unique internal mixing vanes which facilitate mixing of the ingredients during rotation of the container, and which also permit substantially all of the mixed ingredients to be freely discharged by gravity at the elevated discharge location.

Abstract: The invention relates to a concrete mixer, particularly to a truck-mounted concrete mixer, comprising a drum and an actuatable additional mixer tool projecting into the drum from the bottom thereof substantially in the direction of the drum axis. A rotatably driven mixer tool of this type requires the employ of additional gearing, and a sealing assembly for the passage of its shaft through the drum bottom is very complicated and subjected to wear. In accordance with the invention, these disadvantages are avoided by the provision that the mixer tool is adapted to be moved in the axial direction. This permits a cylinder-piston unit to be employed as the drive source for the mixer tool. No gearing is required, and sealing as well as maintenance are simplified.

Abstract: An apparatus for recycling asphaltic concrete comprises an elongated rotatable drum in which composition is introduced at a first end and recovered at the opposite second end, and having a burner extending into the drum so that the burner nozzle is located within the drum intermediate the first and second ends and directs the hot gases toward the first end, and wherein the portion of the drum between the burner and the first end is provided with lifters of a type which prevent the formation of a veil of composition particles from falling through the hot gases of combustion as the drum is rotated, and a second portion between the burner nozzle and the second drum end and which is provided with lifters which cause a veil of composition particles to pass through hot gases of combustion as the drum rotates.

Abstract: A light weight, inexpensive rotary drum mixing device is provided in which an essentially pear shaped drum, open at the small end and having an axially elongated socket at the large end, is rotatably supported on a unitary base having a transversely extended forward end and an upwardly and angularly extending rear end providing a bearing portion detachably engageable with said socket to rotatably support the drum at an inclination of about 35.degree., readily engageable means on the bearing portion and socket for preventing unintended axial movement, the forward end of the frame being slightly forward of the center of gravity of the rotatably supported drum to firmly support the same as drum contents are being mixed by rotation of the drum, and providing a pivot fulcrum for tilting the assemblage to discharge contents of the drum, and groove means adjacent the large end of the drum facilitating application of circumferential force to impart controlled rotation to the drum.

Abstract: An improved recycling apparatus for particulate asphaltic concrete comprises a rotatable drum in which the particulate composition is gradually heated between an input end and an output end having a retractable chute extending into a port at the output end for recovering composition of a selected temperature. The chute contains a temperature sensing device, and the apparatus preferably includes a drive means for inserting or retracting the chute, and thermostat means for selecting a product temperature whereby the drive means causes the chute to be extended into the drum to recover the composition of a selected temperature. In another embodiment, the drum includes first, second, and third lifters each extending along different respective lengths of the drum interior to achieve different exposure of the particulate composition to the heating gases in the drum in the respective different drum sections to achieve improved heating and mixing efficiency.

Abstract: A method for the treatment of sludge to cause its solidification and render it suitable for use as landfill by admixtures of chemicals therewith, the method including the steps of feeding the sludge into a sludge hopper and feeding chemicals into a chemical hopper. The sludge and chemicals are continuously fed, each at a controlled feed rate, into a rotating mixing chamber to control the generation of heat in the mixing chamber generated by the combination of sludge and chemicals whereby the sludge and chemicals therein are mixed and caused to move upwardly and longitudinally of the chamber from the inlet opening to the outlet opening thereof.

Abstract: A small batch mixer having a cylindrical mixing drum which defines a closed mixing chamber is provided for the mixing of livestock feeds in a dust-free operation. Materials are loaded into the mixing chamber through an access opening in the sidewall whereas materials are unloaded through a discharge outlet in the end-wall. The drum is supported for rotation about its longitudinal axis and is inclined such that the materials move by gravity from the front portion to the rear portion of the mixing chamber. As the drum is rotated, vanes along its sidewall tumbles the materials about the mixing chamber while an auger disposed along the longitudinal axis of the drum conveys the materials from the rear portion to the front portion of the mixing chamber in thereby achieving a thorough mixing of the materials. The auger is supported at only one end of the mixing drum.

Abstract: A mixing device for forage and similar product has a rotatable, sloping mixing chamber with its closed rear axial end lower than its open forward axial end. The forward end receives and discharges the forage. Generally linear mixing vanes extend forwardly from adjacent the rear end of the mixing chamber for tumbling the forage during chamber rotation. An axial tubular housing within the mixing chamber encloses a rotatable axial auger, which communicates with the rear end of the mixing chamber to receive forage from the mixing chamber and feed it back toward and out of a forward end of the housing.

Abstract: A light weight, inexpensive rotary drum mixing device is provided in which an essentially pear shaped drum, open at the small end and having an axially elongated socket protruding from the large end, is rotatably supported on a unitary base having a transversely extended forward end and an upwardly and angularly extending rear end providing a bearing portion detachably engageable with said socket to rotatably support the drum at an inclination of about 35.degree., readily engageable means on the bearing portion and socket for preventing unintended axial movement, the forward end of the frame being slightly forward of the center of gravity of the rotatably supported drum to firmly support the same as drum contents are being mixed by rotation of the drum, and providing a pivot fulcrum for tilting the assemblage to discharge contents of the drum, and means externally of the drum facilitating application of circumferential force to impart controlled rotation to the drum.

Abstract: To uniformly and economically disperse liquids, via sprays of droplets, on surfaces of particles, a method moving the particles involves their rotary lifting, followed by their free falling, with a spray of droplets originating from a central area of the overall motion path of the particles. In a preferred embodiment of the blending apparatus, a hollow drum is rotated about a near horizontal axis. Inside the drum, commencing at each end are cantilevered non-rotating shafts, each positioning one or more powered slightly conical discs selectively tiltable to ultimately disperse respective sprays of droplets from a central area.

Abstract: A feed mixing apparatus for use wherever livestock is cared for and fed. The apparatus has a portable base and a shaft mounted rotatable cylindrical drum with internal mixing and conveying blades. A frame grate on the base is positioned in front of a cylindrical drum opening for drum shaft mounting, feed constituent supply and mixed feed discharge.

Abstract: A continuous contactor comprises a rotary tubular rotor through which the streams to be contacted flow. The rotor has an inner wall which is substantially cylindrical and an outer wall spaced from the inner wall. The rotor is divided internally into a number of rings of buckets by axial and radial separators. Each bucket has an opening in the cylindrical inner wall at the leading part of the bucket with respect to the direction of rotation of the rotor.

Abstract: A mixing apparatus having a rotatable drum with a horizontal axis of rotation and an input and a discharge end. The drum supports a number of first mixing wings which upon rotation of the drum in the mixing direction convey the material to be mixed towards the input end and upon rotation in the opposite direction towards the discharge end. There are also a number of second mixing wings having a V-shaped cross-section forming a chute-shaped first side directed towards the discharge end and a roof-like second side. The second mixing wings are attached to the first wings in such a position that the chute-shaped first sides are below the first wings to carry material falling off the first wings towards the input end when the drum rotates in the mixing direction, and so that the roof-like second sides are below the first wings as a consequence of the rotation of the drum in the discharge direction so that the material falling down on the second sides leaves the second wings sideways.

Abstract: An improved asphaltic concrete recycling apparatus comprises an elongated drum having an open inlet port at a first drum end and a product recovery port adjacent a second and opposite drum end, a burner adjacent the first drum end for introducing hot gases of combustion into the inlet port, and an elongated sleeve extended along the interior of the drum intermediate the first and second ends for directing the hot gases of combustion toward the second drum end. In the preferred embodiment, the first end of the sleeve is located in a portion of the drum where a veil of composition is avoided during drum rotation, and the second sleeve end is located in a drum portion where a curtain or veil of composition is formed.

Abstract: A drum mixer for recycling old asphalt pavement features a stationary shroud enveloping a series of circumferentially spaced feed ports medially of the drum. The old pavement is introduced tangentially into the shroud and then into a series of "hoppers" within the shroud formed about the feed ports and revolving with the drum. The old pavement falls through the feed ports onto the exterior of a conical inner drum and is directed to the downstream end of the latter by flighting thereon where it joins virgin aggregate emerging from the interior of the inner drum.

Abstract: An improved recycling apparatus for particulate asphaltic concrete comprises a rotatable drum in which the particulate composition is gradually heated between an input end and an output end having a retractable chute extending into a port at the output end for recovering composition of a selected temperature. The chute contains a temperature sensing device, and the apparatus preferably includes a drive means for inserting or retracting the chute, and thermostat means for selecting a product temperature whereby the drive means causes the chute to be extended into the drum to recover the composition of a selected temperature. In another embodiment, the drum includes first, second, and third lifters each extending along different respective lengths of the drum interior to achieve different exposure of the particulate composition to the heating gases in the drum in the respective different drum sections to achieve improved heating and mixing efficiency.

Abstract: An improved apparatus for recycling asphaltic concrete comprises a rotatable drum having a first port at one end open to atmosphere, a burner adjacent the first end, a second port at a second end of the drum with means for closing the second port, means for recovering the composition from the second port and whereby the closure means and composition recovery means at the second port cooperate to maintain the second port closed except to the extent necessary to recover composition.

Abstract: The apparatus is constituted by a rotatable drum (1). The solid materials and the hot gases coming from a burner (6) flow in the same direction. The drum has an introduction zone (16), a transfer zone (17), an intermediate zone (18) and a zone (19) for hot mixing of aggregates and bituminous materials. The intermediate zone (18) has a first part in which lifting paddles (28) disposed on the inner wall of the drum (1) allow a continuous curtain of materials to be formed over the whole section of the drum (1) and a second part into which the solid materials degradable at high temperature are introduced. In this second part, the drum (1) has a second inner casing (31) coaxial with its outer casing (1), equipped inside with lifting paddles (32).The invention is particularly applicable to producing coated products for road use, from recycled materials.

Abstract: Bucket-type material lifters are adjustably mounted on the inner peripheral surface of a drier drum between pairs of spaced plates carried by the drum, so that the position at which each lifter starts to discharge material during rotation of the drum and the position at which it completes its discharge can be selectively changed.

Abstract: Apparatus for countercurrently contacting solids with a liquid comprises a rotatable drum housing a screw conveyor having helical turns affixed to the cylindrical side wall of the drum and defining a helical passageway for the solids between the turns, the passageway is divided into a series of compartments. Each compartment has a grating receiving the solids and raising the received solids while liquid is drained through the grating and then permitting the drained solids to fall into a succeeding compartment, and an imperforate partition trailing the grating in the direction of rotation of the drum, the partition defining a chamber receiving the liquid drained from the solids with the adjacent side wall of the drum and the helical screw turns. A passageway interconnects each chamber with the upstream compartment and these passageways extend along the side wall of the drum.

Abstract: The present apparatus for preparing bituminous mixtures, especially road construction mixtures which include broken-up road material, uses a kiln type drum through which the introduced heat and the mixture components travel in the same direction from an inlet to an outlet. Between the inlet and outlet there are five zones, namely, a feed-in zone, a mixing zone, a uniformalizing zone, a lifting and dropping zone, and a discharge zone with separate exits for vapors or gasses on the one hand, and for the finished mixture on the other hand. The uniformalizing zone is formed by overlapping components of the mixing zone and components of the lifting and dropping zone.

Abstract: A continuous liquid/liquid or liquid/solids contactor consists of a rotary contactor having a near horizontal axis. The interior of the drum is divided axially into a number of compartments by spaced discs secured to the drum wall and having openings through which the materials to be contacted can pass from one end to the other of the drum. In each compartment, there are a number of buckets which are carried by the discs and which in operation serve to cause intermingling of the materials to be contacted. At the ends of the drum are inlet and outlet passing through rotary joints in the drum ends and carrying the streams to be brought into contact.

Abstract: A process and apparatus for continuously mixing wood chips with a binder finely divided in air, the wood chips falling through a mixing drum in the form of thin layers with the air moving approximately perpendicularly to the direction of falling in a pulsating fashion.

Abstract: A method and apparatus are disclosed for drying and pelletizing organic material such as animal waste, sewage and the like. The organic material is dried in two stages using a high temperature, rotating primary drying drum, and a lower temperature secondary louvred drying drum. The primary drum includes an inlet section and an outlet section. The inlet section includes a plurality of transverse chain curtains for increased heat transfer to the organic material, for breaking up the organic material and for cleaning the sides of the drum. The primary drum outlet section includes a plurality of vanes angularly attached to the inside of the drum to form an auger to retain the material in the drum until it is partially dried to a desired level. The organic material is then transported to the secondary louvred dryer. The louvred dryer includes an input section, an output section and a central pelletizing section formed by adjacent portions of the input and output sections.

Abstract: A machine for drying granular materials such as sand and gravel. The machine includes coaxial inner and outer cylinders. Moist sand is introduced into an inlet end of the inner cylinder and gravel is introduced into the inlet end of the outer cylinder. The sand is moved along the inner cylinder by impellers toward the outlet end of the inner cylinder in heat exchange relation with the inner cylinder while the sand is heated to evaporate water therefrom. The heated sand is directed from the outlet end of the inner cylinder into an inlet end portion of the outer cylinder to mix with the gravel. Impeller assemblies mounted on the interior of the outer cylinder raise the sand-gravel mixture as the cyliners rotate to cause the sand-gravel mixture to advance along a space between the cylinders toward the outlet end of the outer cylinder and to cascade against an outer wall of the inner cylinder.

Abstract: A mixer comprising a rotary driven conical drum into a large end of which sludge and flocculating polymer are introduced, constitutes a contact chamber, and is equipped with baffles and weirs. The sludge and polymer are supplied to a large end of the drum and mixing is accomplished in the large end of the drum where the surface area of the drum is moving most rapidly. Thereafter the mixing action is slowed down by travel of the mixture to the smaller end of the drum, where the surface area of the drum is moving more slowly, to build up the flocs. The sludge/polymer mixture produced in the contact chamber is then discharged through a conduit into any of various types of dewatering devices such as sludge bags, sludge strainers, sludge presses, etc.

Abstract: A rotary drum for treating, especially upgrading, waste material, which includes a cylindrical mantle with an inlet and an outlet respectively provided at opposite ends of the drum and which is provided with annular guides for supporting the drum on stationary supports. The inner wall of the drum is made of concrete.

Abstract: A method of hot mix recycling of old asphaltic concrete paving heats the old pavement, after it has been removed and sized, to a temperature below its firing point and heats fresh aggregate to a greater temperature before combining the two and adding new asphalt. The method is embodied in a drum-mixer type of apparatus modified by inserting a smaller drum in the upstream portion of the large drum. The burner fires into the smaller drum into which the fresh aggregate only is introduced while the old mix (plus additional fresh aggregate in certain cases) is introduced into the annular space between the two drums, the fresh aggregate and the old mix being thereafter combined in the large drum, new asphalt added and the mix further heated.

Abstract: A mixer block used in rotary drums to improve the efficiency of mixing, drying, cooling, heating, or calcining of solid materials such as gravel, stone, fluxes and the like to produce a more uniform product with minimal production of fines and dust is described. The mixer block is especially useful when used as part of the refractory lining in a rotary kiln to calcine fluxstone such as limestone, dolomite, dolomitic limestone, magnesite and the like.

Abstract: A rotary blender rotating about a horizontal axis having an elongate opening and a gate which may be hydraulically operated to open or close said opening. The blender may be loaded through the opening from the top by a hopper or front loading machine and the blended material may be discharged from the opening when the blender is stopped with the opening in an inverted position. Lifting vanes fastened to the inside of the blender in an offset V position rapidly mix particulate material as the blender is rotated.

Abstract: A method and apparatus for treating paving material wherein the asphalt material is tumbled within an inclined drum so that it initially passes through the center portion of a stream of hot gases and is conveyed rearwardly and then is subsequently dropped through a more peripheral portion of the hot gas stream and conveyed rearwardly at a faster rate than it was initially. The apparatus comprises a wheeled frame, an elongated drum having a cylindrical inner surface and which is supported on the frame for rotational movement about its longitudinal axis, a feed chute communicating with the inlet end of the drum, and LP gas burners mounted at the opposite end of the drum so as to direct a flame and stream of hot gas centrally through a drum toward the inlet. A plurality of flights are secured to the drum inner surface which extend radially inward toward the drum longitudinal axis and extend rearwardly in a direction parallel to the axis.

Abstract: A mixing device for viscous ingredients having a motor-driven rotor with a hollow interior defining a surface which is inclined to the axis of rotation of the rotor. Ducts coaxial with the rotational axis of the rotor feed the ingredients into the hollow interior of the rotor where they are premixed by impinging on one or more rods fixed in the rotor perpendicular to the axis of rotation. As the rods rotate with the rotor the premixed ingredients are thrown against the interior surface of the rotor where they flow over the surface to provide further mixing, the thoroughly mixed ingredients being thrown off the edge of the rotor in the form of droplets. Instead of using rods, a conical portion may be provided under the ducts in the hollow interior of the rotor.

Abstract: A milling roll for use in a rice milling machine for removing the bran coating from the exterior surface of the rice kernels, in which the rice kernels are caused to rub or roll against each other rather than between relatively moving surfaces. The milling roll is generally cylindrical in construction with spaced baffles oriented at particular angular positions so that rice kernels will enter the milling roll between certain of the adjacent baffles from the periphery of the rotating roll toward the center thereof where the rice kernels will be caused to rub against each other as they work in and out and are ultimately discharged between adjacent baffles peripherally of the milling roll for discharge from the rice milling machine through the usual rice outlet or discharge spout past the usual pressure plate control mechanism.