Venturedyne, Ltd.

Wehr Corporation

William T Barrett

A composite magnet having a steel back plate on which an inner section of a first magnetic material having a high residual magnetic strength and an energy product greater than 25 million and preferably 35 million G-Oe or greater is positioned. Although possessing such high residual magnetic strength, the first magnetic material contained in the inner section comprises less than 1/8 the entire volume of the composite magnet. A barrier surrounds the inner section, and an outer section of a second magnetic material abuts the barrier and surrounds the sides of the first magnetic material. Such second section of magnetic material has a low residual magnetic strength (i.e., 3,800-4,000 G), and an energy product greater than 3 million G-Oe.

Composite rare earth magnet and method for separating ferrous material

The disclosed eddy-current separator has several new features. One includes a magnet assembly which is metal-sleeved for protecting the magnets from impact by particles or objects piercing the waste-carrying conveyor belt with which the separator is used. A low-rotating-speed epoxy-layered shell surrounds the sleeve for additional protection. A conveying extension carries ferrous 'fines' from the conveyor into the receptacle used to collect waste from which non-ferrous material has been separated. Such extension permits such fines to be under the substantial influence of the magnet assembly over an arc well less than 180.degree.. The conveyor belt uses relatively-closely-spaced cleats of reduced height to reduce the 'loading' of an individual cleat with potentially-piercing ferrous fines. A two pole magnet assembly may be used and/or a magnet assembly in which the magnet pole faces are curved for air gap reduction.

Separtor with improved magnet structure

The improved self-cleaning magnetic separator includes a tube and a conveying flight spiralled about the tube. The separator has a magnetic material collecting portion, a magnetic material discharge portion and a bar-like magnet providing a lobe-like magnetic field. The field is of generally uniform strength along the material collecting portion and diminishes in strength along the discharge portion. In a highly preferred arrangement, the magnet is stationary and the tube and flight rotate with respect to it. Because the magnetic material is 'trapped' by the stationary field, such rotation causes the magnetic material to be urged by the flight from the collecting portion to the discharge portion. The field, of diminished strength in the discharge portion, permits magnetic material to fall away from the discharge portion. In one arrangement, the magnet has a shunt for diminishing the field strength to a very low value, zero or only slightly above, thereby configuring the separator for use even with very finely divided magnetic material.

Self-cleaning magnetic separator

A grate magnet apparatus comprising a frame defining an opening adapted to have material to be separated pass therethrough, a non-magnetic tube supported by the frame and extending across the opening, and an elongated magnetic member removably housed in the tube, whereby magnetic material is attracted to the tube when the magnetic member is housed in the tube and is released from the tube when the member is removed from the tube. The non-magnetic tubes and magnet members are connected both for joint movement to be withdrawn from the path of the flowing material and then for relative movement to release magnetic material from the non-magnetic tube.

Grate magnet

A magnetic separator comprising a plurality of relatively aligned magnetic field generators and a belt associated with the magnetic field generators and supported to move serially through the magnetic fields generated by the magnetic field generators. The magnetic field generators are spaced relative to each other in the direction of their relative alignment a distance sufficient to produce serial gaps between the magnetic fields generated such that magnetic articles attracted to the belt by one of the magnetic fields fall away from the belt at the gaps. The magnetic separator also comprises a conveyor below the belt and supported at the gaps to receive magnetic articles falling from one of the magnetic fields and to transport the fallen magnetic articles to the next magnetic field where the magnetic articles are again attracted to the belt.

Magnetic refuse separator

A solid waste magnetic separator having a material transport belt, a mechanism for generating a magnetic field, and a mechanism for supporting the belt so magnetic materials can be attracted to the belt and transported therewith as the belt moves through the magnetic field. The magnetic field generating mechanism comprises at least two magnetic assemblies aligned relative to each other in the direction of travel of the belt. A ferromagnetic pole shoe is disposed between the belt and the magnetic assemblies, thereby creating a relatively uniform combined magnetic field along the magnetic assemblies so that heavy magnetic materials attracted to the belt remain attracted to the belt as the belt moves through the combined magnetic field.

A wear protected belt comprising an elongated, generally flexible belt having a plurality of plates attached to the face of the belt. The plates extend across the belt at an angle to its longitudinal axis, and substantially cover a longitudinal portion of the belt. Each plate has a first plate portion, or rib, which projects laterally from the face of the belt. Attached to the rib is a second plate portion, or top which projects from the rib and extends over a portion of the belt parallel but spaced from the face of the belt. Disposed between the top of the plate and the belt surface is a shock absorbing bar means, or bar. When heavy objects impact the top of the plate, the top of the plate engages the bar and the bar absorbs the force of the impact. The bar also resists shearing or bending forces on the plate by bearing against the top of the plate and thereby resisting turning motions on the plate.

Heavy material conveyor belt wear protection

A coil for an electromagnet is made up of a spiral wound, anodized aluminum strip, and a strip of magnetic material wound in interleaved fashion with the central portion of the aluminum strip. The magnetic material strip is electrically insulated from the aluminum strip and the aluminum strip is electrically energized to excite the magnet. The magnetic material strip is wider than the aluminum strip and extends beyond both opposite edges of the aluminum strip to make direct contact with the coil housing and a pole shoe. Electrical insulating material fills the cavity defined by the magnetic strip projecting beyond the edges of the aluminum strip.

Electro-lifting magnet

Wear protection for a conveyor belt is provided by metal plates detachably connected to the belt along its length and located in the central area of the belt. The plates are constructed and arranged relative to each other to prevent foreign matter from becoming lodged between the plates and the belt surface. Cleats are provided on the plates.

Conveyor belt wear protection

A magnetic separator includes a continuous belt revolving in a closed path in association with a supply conveyor carrying magnetic and non-magnetic refuse. A magnetic assembly at the belt includes, in the direction of belt travel, a pick-up magnet, a transfer magnet, and a discharge magnet. A curve is provided in the path of belt travel, other than at its head or end pulley, and the magnetic field is generated upstream and downstream of the belt curve and at the curve. The field from the pick-up magnet extends along the belt to the belt curve, the field from the transfer magnet is at the curve, and the discharge magnet is on the opposite side of the curve spaced from the transfer magnet to provide a gap in the magnetic field between the transfer and discharge magnet. Magnetic material from the burden on the supply conveyor is attracted to the belt and non-magnetic material falls away. The magnetic material so attracted travels with the belt into the gap in the magnetic field at which point it is released and falls away from the belt. The released magnetic material follows a trajectory which carries it into the field of the discharge magnet where it is again attracted to the belt. This release and re-attraction movement tends to dislodge any non-magnetic material initially drawn to the belt with the magnetics. In the area of the discharge magnet the magnetic material is moved completely out of the magnetic field whereupon it falls away from the belt for collection. The discharge magnet is adjustable relative to the transfer magnet in the direction of belt travel to vary the length of the gap. The conveyor belt includes a plurality of cleats projecting from the belt surface and spaced along the belt length. Replaceable wear pads are attached to the belt surface and to the cleat surfaces facing in the direction of belt travel.

Growing community of inventors

Waukesha, WI, United States of America

William T Barrett