Abstract: Particles suspended in a fluid carrier are differentially separated by, first, grading the particles into fractions of equal settling rates and, second, separating the equal-settling particles of each fraction according to the magnetic susceptibilities of the particles. The particulate sample to be separated is passed through a two-path parallel flow system. In one path, the sample is selectively graded, by elutriation, into equal-settling fractions. Each such fraction then flows directly to the second path, where it crosses a magnetic field at a velocity proportional to its settling rate. Such proportionality between settling rate and flow velocity provides a residence time which ensures that the degree of deflection, in response to gravitational and magnetic forces, required for separate recovery of magnetic particles, on the one hand, and non-magnetic particles, on the other hand, will be attained within the active length of the magnetic field.

Abstract: A method for brightening a kaolin clay wherein an aqueous dispersion is initially formed of said clay, which dispersion is blunged and conditioned and the resulting slurry thereupon subjected to a froth flotation treatment to remove titaniferous impurities. The purified product from the froth flotation treatment is thereupon subjected to magnetic separation by passing such product through a slurry-pervious ferromagnetic matrix positioned in a high intensity magnetic field, which results in substantial, additional brightening of the clay.

Abstract: A method for magnetically separating discoloring contaminants of low magnetic attractability from a crude kaolin clay containing said contaminants. A dispersed aqueous slurry of the clay is seeded with a finely divided magnetic particulate. The seeded slurry is then subjected to a magnetic field, to magnetically flocculate the contaminants and the magnetic particulate, and thereupon remove same.

Abstract: A can crusher having a pair of vertically aligned wheels with one of the wheels having a resilient tire and the other, driven wheel being non-resilient and having outer projecting bar means that contact the resilient tire. A vertical chute directs the cans into the intersecting contact area of the rotating wheels and a second chute directs the crushed cans at the velocity imparted by the rotating wheels to contact a deflecting surface, whereby the cans are deflected at a high velocity into an air passage containing air moving therein under pressure that in turn passes through a venturi at the point of mixing with the cans, increasing the velocity of movement of the carrying air. Also the suction for the air under pressure is used to separate cans to be crushed from bottles.

Abstract: A method for brightening a kaolin clay wherein an aqueous dispersion is initially formed of said clay, which dispersion is blunged and conditioned and the resultant slurry thereupon subjected to a froth flotation treatment to remove titaniferous impurities. The purified product from the froth flotation treatment is thereupon subjected to magnetic separation by passing such product through a slurry-pervious ferromagnetic matrix positioned in a high intensity magnetic field, which results in substantial, additional brightening of the clay.

Abstract: In an ore cleaning process the underflow from an ore classifying cyclone is delivered to a heavy medium cyclone where the ore is cleaned. The underflow leaving the classifying cyclone is continually measured for specific gravity and flow rate while the specific gravity of heavy medium that can be applied to the underflow is continually measured. The amount of this heavy medium and the amount of water required to be added to the underflow are continually controlled as functions of the specific gravity and flow rate thus measured, whereby a substantially constant specific gravity and flow rate of the underflow is maintained as it enters the heavy medium cyclone. Magnetic separating means receive the overflow from the heavy medium cyclone and separate the heavy medium from the ore, while other magnetic separating means receive the underflow from the same cyclone and separate the heavy medium from the rejects. The heavy medium is used again.

Abstract: A method and apparatus for separating magnetically susceptible particles from a mixture of magnetically susceptible particles and non-magnetic or less magnetically susceptible particles in which a stream containing the mixture in a fluidized condition is introduced under pressure or under gravity into one end of an arcuate separation channel having an inlet end and an outlet end and arcuate inner and outer walls and at least one connecting wall which confine the steam and constrain it to flow in a single unidirectional arcuate path along the channel in frictional contact with the inner and outer walls and with the connecting wall, the velocity of the stream and the frictional resistance to flow being such that the stream is subject to sufficient centrifugal force as it flows around the channel that there is produced in the channel a secondary circulation radially outwardly within the body of the stream and then radially inwardly, in which the stream during its passage around the channel is subjected to a radi

Abstract: Apparatus for separating magnetic materials from nonmagnetic materials in a supply of mixed waste material, comprising an inclined rotary drum having loading means for introducing a continuous flow of mixed waste materials into the drum, means for simultaneously directing a stream of air at relatively high velocity through the drum to entrain and thereby remove light materials from the mixture therein out of the higher end thereof, means for rotating the drum to move heavy materials toward the lower end thereof, and magnetic means for selecting magnetic materials from the separated heavy materials and removing the magnetic materials separately from the drum.

Abstract: A method for brightening a kaolin clay wherein an aqueous dispersion is initially formed of said clay, which dispersion is blunged and conditioned and the resultant slurry thereupon subjected to a froth flotation treatment to remove titaniferous impurities. The purified product from the froth flotation treatment is thereupon subjected to magnetic separation by passing such product through a slurry-pervious ferromagnetic matrix positioned in a high intensity magnetic field, which results in substantial, additional brightening of the clay.

Abstract: A device for recovering salvagable components from a mixture of compacted solid waste, especially municipal waste, which includes ferrous metals, non-ferrous metals such as aluminum, fibrous organic and inorganic materials. In this installation the solid waste, preferably after first breaking it up, is fed to a magnet assembly for dividing the components into ferrous metals and non-ferrous materials including ferrous metals and non-ferrous metals and organic or inorganic materials. The ferrous metals and the non-ferrous materials containing ferrous metals are then subjected to fragmentation after separating ferrous metals parts from non-ferrous materials. The resulting fragments are separated into ferrous metals and non-ferrous materials and separately conveyed to collection stations. Similarly, the non-ferrous metals and the organic or inorganic materials are first fragmented, then separated from each other and finally separately conveyed to collecting stations.

Abstract: There is disclosed a method and apparatus for sorting and classifying cans involving a first step of magnetically separating ferrous and bimetallic cans from aluminum cans. The aluminum cans are then carried to a collecting point. The next step is to separate the ferrous cans from bimetallic cans by immersing both in a liquid bath. The bimetallic cans and some punctured ferrous cans (such as large juice cans) are collected from the top of the bath and carried to a size separating device. The ferrous cans, which are normally fully opened, sink in a bath and are collected by a conveyor from the bottom of the bath. The bimetallic cans and the punctured cans are separated by sizing conveyors and are collected in separate collection devices. The result is to achieve a separation of the three basic classes of cans, reliably and inexpensively.

Abstract: A horizontal drum-type magnetic separator for granular feeds of magnetic and nonmagnetic materials utilizing a drum rotatable about an axis of rotation into which granular feeds are infed. A magnetic field is created as by a plurality of magnets disposed about the outer periphery of the drum. A first chute is provided within the drum for collecting the nonmagnetic material as the granular feed passes through the magnetic field and a second chute is provided for collecting the magnetic material after the granular feed passes through the magnetic field.

Abstract: A radial magnetic field gradient applied from an elongated central source is traversed parallel to the elongation by a turbulent flow of a slurried mixture of magnetic and nonmagnetic components in the presence of a force thereon opposing in direction the attractive force of the magnetic field upon the magnetic components whereby the respective components are separated by the disparate forces and the flow acts to continuously advance the separation and direct separated components toward related collecting stations.