Abstract: An air jigging machine for dry processing of raw materials, an air supply conduit for supplying working air to an air funnel, and having a pulsing valve. At least two jigging-material carriers for receiving material from a material-feeding mechanism are configured to consecutively receive therethrough working air from the air funnel and to separate the material into heavy and light material layers. The jigging-material carriers are disposed one above the other and are spaced apart. A wall encloses this intermediate space. At least one bypass airline branches off from the air supply conduit downstream of the pulsing valve, bypasses the lower jigging-material carrier, and communicates with the intermediate space for supplying an additional working airflow thereto. Respective discharge devices are provided for the jigging-material carriers for the material layered thereon during a jigging process.

Abstract: An apparatus for segregating particulate by density and/or size including a fluidizing bed having a particulate receiving inlet for receiving particulate to be fluidized. The fluidized bed also includes an opening for receiving a first fluidizing stream, an exit for fluidized particulate and at least one exit for non-fluidized particulate. A conveyor is operatively disposed in the fluidized bed for conveying the non-fluidized particulate to the non-fluidized particulate exit. A collector box is in operative communication with the fluidized bed to receive the non-fluidized particulate. There is a means for directing a second fluidizing stream through the non-fluidized particulate as while it is in the collector box to separate fluidizable particulate therefrom.

Abstract: The invention describes a process and apparatus producing a dense coke fraction from a first particulate coke fraction having a first average density and a first average particle size distribution, stratifying the coke fraction in a density separator into at least two fractions, the at least two fractions comprising a light coke fraction and the dense coke fraction. The dense fraction having an average density greater than the first average density and a particle size distribution substantially equivalent to the first average particle size distribution. The apparatus includes an inclined oscillating table comprising a gas-pervious deck, and a gas mover.

Abstract: The invention relates to a sorting device and method for sorting granulated mass containing varied materials, such as granulated mass containing varied materials, such as granulated electronic scrap. According to the invention, the sorting device comprises a planar, elongated trough conveyor (1) having at least a first elongated and vertical edge (2, 3, 4); a feeding device (5) for feeding the mass into the first end (6) of the trough conveyor; a vibrator (9) provided with a motor (7) and an eccentric (8), whose rotation axis (10) is disposed in a plane deviating from the plane defined by the trough conveyor so that the mass proceeds obliquely forwards in the trough conveyor towards the first edge and second end (11); a first suction device (12) for removing the lightest surface portion of the mass near the edge, a guide (13) which is oblique with respect to the edge for bringing apart the mass flow from the edge; as well as a mechanical separator member (14) for dividing the mass flow into two parts.

Abstract: A mechanical device for gravimetric concentration of minerals and known as a jig, operating according the known principle and general design thereof, being original in that a continuous and adjustable evacuation of the dense grained fraction occurs in closed compartments which, in this case, are the legs of the mechanical device.

Abstract: A system for delivering the same or differing controllable amounts of washing liquid to several flights of a spiral separator including a housing, a plurality of spaced members having a respective generally vertical passage communicating with fluid in the housing and permitting fluid to flow therethrough. A plurality of fluid passageways respectively communicate with the members to provide the same or differing amounts of liquid to each of the flights. The distributor housing may include a central liquid receiving chamber, a plurality of spaced compartments located in proximity with the chamber, a plurality of passages throughwhich fluid flows into fluid passageways respectively coupled to the compartments, a single flow controller rotatable therein to expose different portions of said passages at every rotation thereby varying the liquid flow to each compartment.

Abstract: A system for dry separation of powders into at least two fractions including a powder to be separated and a separator including a hollow body rotating about an axis and defining a cavity having a powder engaging surface, the surface of the cavity being a surface of revolution which rotates about the axis, an upper edge of the cavity having a greater diameter than a lower edge, a system controlling the rotation of the body, at least one feeder continuously feeding dry powder into a feeding zone adjacent to the cavity surface near the lower edge, the length of the feeding zone being at least an order of magnitude less than a circumference of the cavity surface of the lower edge, at least one discharge device continuously discharging the powder from the cavity surface, the at least one discharge device including a body arranged along substantially the entire length of the generatrix of the cavity surface and located immediately in front of the feeding zone aligned with the rotation of the cavity surface, a first

Abstract: A self-contained gold separation kit adapted for easy carrying using a shoulder strap uses a single-spring rocker assembly for agitation of stream bed materials for separation of gold. The main kit elements include a sluice box, material tower and collector tray that are contained for carrying within a box, and in use those elements are then rotatably mounted above the carrying box. That box also serves to contain a quantity of water to be used repeatedly in washing out the bed materials, hence the device can be used at a distance away from stream bed. The weight of that water also serves to prevent the device as a whole both from moving about while being rocked and from tipping over. A dipper is included for dipping water over the bed materials, and also a gold pan for the final separation of the gold and a collector tray for collecting tailings from the gold separation.

Abstract: An apparatus for providing a fluidized bed to effect the separation of a mixture of articles having at least a first density and a second density that is greater than the first density into separate groups. The apparatus includes an inclined trough which is supplied at an input end with either a fluidization medium, such as sand, or a mixture of articles from which a fluidized bed is formed by forcing gas upwardly through the bottom of the trough and through the fluidization medium or the mixture. In the case where a fluidization medium such as sand is used, the mixture of articles is introduced into the fluidized bed medium so as to be entrained therewith to effect separation as the articles travel in the direction of flow of the fluidized bed medium. Vertical oscillatory movement is imparted to the inclined trough to improve the separation and layering where the mixture of articles is fluidized, or to improve the density uniformity where a fluidization medium such as sand is fluidized as the bed.

Abstract: A modified fluidized bed separates materials differing in weight by as little as one percent. A fluidized bed is formed by directing air through vanes on an underside of a screen. Products, such as peanuts, delivered to a central portion of the screen are initially separated so that lighter weight products float on the fluidized bed and are drawn by gravity toward a lower end where a second separation takes place. The lightest products at this second end are listed over an exit weir by a controllable air jet. Desired products are not ejected and are collected.

Abstract: A method and apparatus for sorting articles with small density differences utilizing a flotation stream. A separator is provided in which a flotation stream continuously flows through a trough and is used to effect the separation of a mixture of articles having small density differences into several groups. Each density group of the mixture of articles to be separated is introduced at the head of the flotation stream at a selected depth. In one embodiment, the flotation stream may be comprised of a fluidized bed which is created by forcing a gas upwardly through a fluidization medium such as sand. In another embodiment of the invention, the flotation stream may be formed from a liquid.

Abstract: A sieve bend has been described incorporating a headbox 40, throat mechanism 46, nip flap 90 and sieve surface area 52 supported by frame 96 which may have portions thereof rotated or positioned behind headbox 40 temporarily until its use is desired. The invention overcomes the problem of requiring frequent end for end reversal of the sieve surface area and of debris jamming the throat mechanism. Further, the invention permits in process variation of the sieve surface area 52 in response to downstream conditions.

Abstract: In screening apparatus for paper fiber stock of the type wherein a cylindrical perforate screen member defines screening and accepts chambers on the inner and outer sides thereof in a closed, pressurized housing, the inlet chamber for stock to be screened is located below the screening chamber to facilitate elimination of high specific gravity reject materials before the stock reaches the screening chamber. Special provision is made for accelerating the flow of plastic and other reject materials of lower specific gravity than wet paper fibers to a reject chamber above the screening chamber, and special provision is also made for preventing recirculation of such reject materials to the lower end of the screening chamber and thereby concentrating them in the reject chamber from which they are removed by way of a dewatering device that delivers essentially dry reject material for ready disposal while preventing the escape of pressure from the housing.

Abstract: A pulsator for enriching, particularly, hard coal has mounted in a pulsating compartment a hoisting wheel and a bracket both mounted on a drive shaft, or a ratchet wheel mounted on a drive shaft which runs in bearings above the liquid level of a working trough. The pulsating compartment is of cylindrical shape and is connected to working trough along its longer side and separated from the working trough with a wall. The pulsating compartment consists of an outer wall to which is welded a bottom wall shaped as an arc and connected via a vertical wall to an oblique wall of the working trough. The bottom wall is provided at its lowest point with a grate encased with a pulp outlet stub pipe. The hoisting wheel consists of a side wall connected with an outer screen which is connected in turn to an outer ring along the periphery of the outer screen.

Abstract: Apparatus is provided to separate heavier metal particles from lighter particles gangue in a fluidic medium by gravity and fluid flow. A vertical container provides a lower fluid input chamber that communicates through a medial structure providing a plate defining a plurality of valve ports, a screen, and a plate defining a plurality of holes to an upper chamber carrying particulate material to be beneficiated. Pressurized water flows upwardly through the medial structure to separate more dense metal bearing particles in the medial structure and gangue exits from a central orifice defined in the medial portion of the separating structure. The apparatus uses small amounts of water which may be recycled. The beneficiator is unusually efficient in recovering particulate gold from alluvial sands.

Abstract: In jigging for purposes of gravity separation of material to be concentrated the material is sorted into a heavy fraction which is withdrawn through a screen (2) and a light fraction withdrawn above the screen (2), by periodically passing flows from the bottom to the top through the feed material. If the material is predominantly of finer character, there will be a ragging (3) on the screen (2) composed of particles which are larger and usually also specifically heavier than those of the feed material. In this manner, however, the separation of feed material will be unsatisfactory in the fine particle size range having upper particle size limits between 300 .mu.m and 1 mm, particularly so if the particle size ratio of the material is rather broad.

Abstract: The invention relates to a percussion jig in which the chutes for receiving and discharging the material to be separated are each divided into a plurality of individual chute segments arranged spaced from one another so that the spaces between adjacent individual chute segments facilitate a free equalization of the levels of the settling fluid during the upward and downward movements of the settling tank.

Abstract: A rotary feeder for simultaneous screening and discharging of material from the bottom part of a fluidized bed reactor. The rotary feeder is provided with a rotor having blades, between which pockets are formed. In the rotary feeder there is disposed an air inlet and an air outlet for accomplishing a flow of air through the pocket after it has moved over the inlet of the supply material.

Abstract: The invention relates to an apparatus for pumping and conditioning a drilling fluid normally utilized in the drilling, completion or workover of a subterranean oil or gas well. The apparatus includes a rotor housing encasing a rotatably supported rotor assembly and means for driving the rotor assembly. The rotor assembly is divided into first and second chambers. The first chamber has a radial acceleration passage, connected between an inlet for the drilling fluid and a peripheral portion of the chamber, and means for collecting a first component of the drilling fluid, the drill chips, which are the heaviest, and are forced to the periphery of the first chamber.

Abstract: An apparatus and method for separating waste material contained in a heap in at least one separating zone, the heap largely comprising particles of the same shape, size and density, from which the waste particles differ. It also relates to apparatus for performing the method. The heap is fed onto an inclined conveying surface where it is vibrated and the waste particles are removed upwards and the remaining particles downwards, the vibrations being initiated at an angle to the horizontal which is larger than the inclined position of the conveying surface.

Abstract: A wet-type rotary sand classifier of this invention is provided with a plurality of helicoid blades which are secured onto the inner surface of the rotary drum along the entire length of the drum with their respective rear ends terminating at the rear end plate of the rotary drum at a desired angle relative to the axis of the rotary drum. Due to the above construction, the sand which has settled onto the inner bottom surface of the rotary drum can be transferred to the rearmost corners formed by the helicoid blades and the rear end plate whereby the thus transferred sand is raised upward by the helicoid blades corresponding to the rotation of the drum without carrying the water dams which are usually formed in the conventional wet-type sand classifier.

Abstract: Apparatus and method for separating heavy materials from ore, the apparatus having a hopper or sluice box open at its top and defining a discharge opening on one side. Spaced, parallel pipes extend across the hopper adjacent, but above, the bottom of the sluice box, the pipes having holes which direct the water sidewise toward the adjacent pipes. The holes of adjacent pipes are staggered with respect to each other. Shields or spreaders, disposed over the top portions of the pipes, protect the pipes from the ore which is charged into the open hopper, these spreaders directing the ore between the sprays of water to produce a slurry which passes out of the side discharge opening over a riffle or extractor, providing a downwardly inclined series of spaced parallel, transversely extending, upright barriers which snare and retain the heavy materials, such as gold and black sand. A plurality of these sluice boxes and ripples are juxtaposed on the flat bed of a truck. A common pump supplies water to the sluice boxes.

Abstract: A dredge unit having a buoyant support carrying a sluice box suspended beneath, a water suction system connected to an outlet end on the box and a suction hose operatively connected to an inlet end thereof. The water suction system operates to draw water and material through the suction hose and into the sluice box where material of relatively high specific gravity is contained while the remainder and the water is discharged from the system.