Abstract: A method for classifying wet coal for obtaining coal charges suitable for use in a coke oven comprising classifying the wet coal directly in a cylindrical screen which rotates and revolves around an eccentric rotation shaft while blowing a high pressure gas stream to the screen to eliminate adhesion of the wet coal particles to the screen. The method enables a continuous and consistent classification of wet coals without the clogging of the screen and the dust pollution. The cokes obtained by dry distillation of the coal classified by the present method show high quality.

Abstract: A separator for separating coarse particles from cellulose pulp suspensions and the like comprises a first separation chamber provided with an inlet for incoming mixture, a first outlet for the light fraction, and an outlet for an intermediate fraction enriched in coarse particles. A second separation chamber is provided with a second inlet, a second outlet for a light return fraction, and an outlet for separated heavy fraction, the outlet for intermediate fraction being connected to the second inlet leading from a first zone in the first separation chamber. Said zone has a higher pressure than a second zone connected to the second outlet, the second zone being located in the first separation chamber or connected to the latter, the first and second separation chambers thus communicating to form a circuit.

Abstract: An automatic cleaning system is provided for a mud separator apparatus. Water and mud inputs to a mud pump feeding the separator are respectively controlled by two butterfly valves ganged for cooperation, and operated by a single valve actuator motor. When the mud separator is shut off, a time delay relay is actuated which keeps the mud separator rotor motor on line during a predetermined flush cycle. The valve actuator opens the water valve, and closes the mud valve, permitting the separator to be flushed with water. Activating the start button returns the valve actuator to the position in which the mud valve is open and the water valve is closed, thereby returning the apparatus to the mud separation cycle.

Abstract: A filtering and washing device has a filter body mounted in a housing for rotation about a horizontal axis and comprising a first portion in the form of a truncated cone or pyramid having a base plate with an eccentrically positioned polygonal orifice and a second portion in the form of a sawtooth-shaped tube rigidly connected at one end to the orifice and at an opposite end to a cylindrical drive shaft rotatably journaled in the housing and operationally connected to a motor, the tube in turn being formed from a multiplicity of hollow prisms or truncated pyramids. The first and second portions have surfaces provided with respective filter means. A pipe fixed to the housing traverses an end plate of the first portion opposite the base plate for rotatably supporting the filter body at one end and for feeding to the first portion material to be filtered or cleaned, while the tube is provided with an opening spaced from the base plate of the first portion for dispensing treated material.

Abstract: A screen drum and a method for its manufacture is disclosed wherein the screen drum comprises at least two cylindrical screen members spaced apart, between which a stiffening ring is disposed. The stiffening ring has two cylindrical surfaces which guide the ends of the cylindrical screen members, and a projecting part between them. The cylindrical screen members and the stiffening ring are attached to each other by a weld joint connecting the projecting part of the stiffening ring and the ends of the cylindrical screen members and filling the gap between them.

Abstract: An apparatus for the separation of solids and liquids from a suspension has a hollow drum rotatably mounted about a horizontal axis. The drum wall is a screen made of a plurality of wires, preferably wedge-sectioned wires; spaced apart in a parallel arrangement and lying axially along the drum. Inlet means direct the suspension against the inner surface of the wall at an angle less than right angles, and preferably substantially tangentially to the inner surface, in a direction opposing the rotation of the drum. The separated solids remain within the drum and are extracted therefrom by suitable means.

Abstract: A centrifugal screening apparatus for scalping or sizing bulk materials in which an auger assembly conveys the bulk materials from an intake chamber into a cylindrical screening sleeve mounted within an enclosed screening chamber and subjects the bulk materials to centrifugal force for impingment against the screening sleeve, with the fines passing through the screen for gravity discharge from the screening chamber and the tailings being conveyed to a separate tailings chamber for separate gravity discharge therefrom. The auger assembly within the screening sleeve is equipped with a cylindrical shell integral with the auger assembly and extending the effective length of the screening sleeve that defines along the length of same uniformly spaced apertures thereabout that are separated by imperforate walling.

Abstract: Apparatus for use with extremely low-grade aggregate ore, for deriving a concentrate comprised of metal-bearing ore particles having densities within a predetermined range. The apparatus is in the form of a mobile, self-sustained system including a vehicle trailer for horizontal transport and elevated operational support, plus an integral power system capable of supplying the total energy requirements of the apparatus. Two types of particle size separation are applied, followed by compaction and particle density separation. Two density separation areas are provided to effect both coarse and fine gravitational shaving actions, and dual adjustment controls are also provided to vary the shaving force intensity to derive the concentrate independently of changes in the particular characteristics of the aggregate being processed. The apparatus includes outer and inner cylindrical chambers concentrically mounted on the trailer so as to be tiltable and rotatable.

Abstract: An apparatus for separating coarse and fine particles of intermediate specific gravity from an aggregate containing said particles of intermediate specific gravity as well as fine and coarse particles of higher specific gravity by use of a liquid of lesser specific gravity than any of said particles, which apparatus includes a pair of inclined, axially rotating, concentrically disposed helical ribbon flights separately secured within an annular housing such that the rotating action of said flights transports the fine and coarse particles of heavier specific gravity out of the flowing aggregate slurry. The fluid is then drained from the intermediate specific gravity particles passing with the fluid through the lower end of the annular housing in a screened cylinder.

Abstract: A frusto-conical screen separator having its longitudinal axis inclined from the horizontal so that its undersurface lies in an essentially horizontal plane, the separator being divided internally into three zones, the first zone comprising a dewatering zone at its largest diameter end, the second zone comprising a washing zone, and the third zone comprising a final dewatering zone at its smallest diameter end, the separator having external shower means overlying the first and second zones, breaker bars in the first zone, internal baffle means in the second zone, and guide bars in the third zone, the materials to be separated passing through the separator from its larger to its smaller end, a recovery tank underlying the separator for recovering separated materials passing through the screen, the unscreened residual materials being discharged at the smaller end of the separator.

Abstract: A cylindrical sand reclaimer drum for removing spent bonding contaminants and refuse from chemically bonded foundry molding sand and the like. The cylindrical drum is rotatably mounted along its longitudinal axis and is supported in a substantially horizontal inclined position along its longitudinal axis. The cylindrical drum has an intake opening at the elevated end thereof to receive the contaminated sand and process it through a plurality of internal compartments containing spherical or cube shaped abrasion media. The compartments are formed by a plurality of spaced-apart circular divider panels mounted on the central spindle or shaft of the cylindrical drum and which are perpendicular to the longitudinal axis thereof and are axially adjustable therealong. A plurality of spaced-apart openings are provided along the circumferential edge of each of the divider panels.

Abstract: A fractionating apparatus under microprocessor control including a tumbler having a series of screens of progressively larger openings around its periphery. A sample of particulate material is passed successively through each of the screens by incremental rotation of the tumbler. To aid in classifying the fractions, a spray of fluid is projected against the screens and a rocking motion is imparted to the tumbler. The smallest fraction, not being retained, is entrained in a moving stream of fluid and passed directly to a porous weighing member. When this entire fraction is deposited and weighed, the next larger fraction is accumulated in the weighing member. These individual weights and their sum are recorded and from them size percentages are computed.

Abstract: A machine for receiving mixed concrete from a ready mix truck provides a receiving hopper and an elevator for lifting the material therefrom arranged to discharge it into a classifying rotating drum incorporating a spiral conveyor into which water is sprayed during use. A sump and a secondary conveyor are positioned beneath the classifying drum so that the separated sands, aggregate and other material, washed and separated from the concrete mix, introduced with the cement and waste water are confined to the sump and a separate settling tank from which the fine sands and similar materials can be salvaged.

Abstract: Lead battery components such as metallic grids and paste are fed into a tumbling drum which has inlet and outlet ends and an intermediate region in which there are screens for the fine particles of paste to discharge to the exterior of the drum. Water is sprayed onto the plates in the drum. A shroud or housing surrounds the region of the drum containing the screens. Means are provided to create subatmospheric air pressure in the shroud and, consequently, in the drum. The slurry of paste particles is collected in a tank which is integral with the bottom of the shroud. The slurry is passed through a cyclone separator and the water extracted by the separator is recirculated through the lines which supply the spray nozzles. All openings in the drum are subjected to subatmospheric pressure.

Abstract: A device for separating in a continuous process particles such as heavy ml particles consisting of fuel and/or breeder materials for core reactors, from a first liquid and introducing the separated particles into a second liquid. The device comprises a screen in the form of a movable endless belt or drum over which ends a feeding line conveying the first liquid containing the particles to be separated onto the endless screen. While the particles are retained on the surface of the moving screen journalled in a housing, the first liquid passes through the screen into a catching funnel and from there to a discharge, the catching funnel being arranged in the housing. In the lower portion of the housing and in contact with the outer screen surfaces is a second liquid which takes off from the outside of the screen the particles deposited onto the screen.

Abstract: A treatment chamber for purification and fractionation of materials suspensions, particularly fibrous suspensions under pressure, and wherein the treatment chamber includes a rotary screening drum provided with pulsation members, the drum also including screening holes located on the back-side of, or immediately behind, the pulsation members as viewed in the direction of drum rotation.

Abstract: An apparatus for effecting purification and fractional separation of a material suspension, which includes a screening assembly of the closed centripetal type comprising an outer annular chamber with a stationary outer shell and also an inward rotatable drum, together with an inner annular chamber which is radially outwardly defined by said first drum and radially inwardly by a second screening drum, an improvement in the efficiency of the separatory apparatus consists in providing means for creating pulsating waves in the suspension in association with said first rotating screening drum.