Alan J Fritz, 94911 SW 4Th Ave, Grand Rapids, MN 55744

7886913, Feb 15, 2011

Apr 9, 2009

12/384830

Alan J. Fritz - Grand Rapids MN, US
Eugene R. Bergstrom - Deer River MN, US
Edward J. Shaughnessy - Bovey MN, US

Magnetation, Inc. - Nashwauk MN

B03C 1/00

209224, 209 39, 209214, 2092231, 209225, 209232

Methods to separate certain valuable elements and/or minerals that utilize wet screens, hydro-cyclones, low intensity magnetic separators and/or Mag Wheel™ separators, including a specially designed magnetic field amplifying matrix. The methods are applicable to mining, manufacturing, mineral processing, or other treatment processes or systems.

4046680, Sep 6, 1977

Jan 29, 1976

5/653366

Alan J. Fritz - Grand Rapids MN

Itasca Magnetics, Inc. - Minneapolis MN

B03C 114

209214

A magnetic separator in which the substance to be treated is passed in one direction through a body of foraminous, magnetically susceptible material of significant extent, while traversing in another direction a magnetic field extending in still another direction, the directions being substantially orthogonal. Vibration is applied to the body, preferably linear and preferably in generally the direction of the field. The field opposes the passage of magnetic particles though the body while the vibrator promotes the passage of non-magnetic particles, so that they emerge from the body at different locations for separate collection. The body is conveniently a hollow cylinder built up of sections of magnetic stainless steel screening folded and shaped, and the movement of the body is preferably rotation, the substance being applied to an outer cylindrical surface of the body and emerging from an inner, concentric cylindrical surface. A structure comprising a plurality of such hollow cylinders spaced axially along a hollow drum is shown, with means for feeding the substance individually to the several cylinders: the cylinders pass between fixed magnets during a portion of their rotation. The substance to be fed may be dry or in a slurry: when the slurry is used, certain modifications of the apparatus are desirable to improve its efficiency, and are also disclosed.

3947349, Mar 30, 1976

Mar 14, 1975

5/558337

Alan J. Fritz - Grand Rapids MN

B03C 114

209214

A magnetic separator in which the substance to be treated is passed in a first direction through a body of foraminous, magnetically susceptible material of significant extent, while traversing in a second direction a magnetic field extending in a third direction, the directions being substantially orthogonal. Vibration is applied to the body, preferably axial and preferably linear. The field opposes the passage of magnetic particles through the body while the vibrator promotes the passage of non-magnetic particles, so that they emerge from the body at different locations for separate collection. The body is conveniently a hollow cylinder built up of sections of magnetic stainless steel screening folded and shaped, and the movement of the body is preferably rotation, the substance being applied to an outer cylindrical surface of the body and emerging from an inner, concentric cylindrical surface. A structure comprising a plurality of such hollow cylinders spaced axially along a hollow drum is shown, with means for feeding the substance individually to the several cylinders: the cylinders pass between fixed magnets during a portion of their rotation.

4874508, Oct 17, 1989

Jan 19, 1988

7/146039

Alan J. Fritz - Grand Rapids MN

Magnetics North, Inc. - Grand Rapids MN

B03C 114

209214

An improved magnetic separator arrangement is provided. One major improvement relates to modifications facilitating utilization of relatively dense and tightly packed matrix material within races, through which a slurry of ore material passes during separation. The tightly packed matrix material is accommodated through utilization of flexible race walls, and compression and expansion mechanisms selectively operable to facilitate separation. A cover mechanism inhibits water flow turbulence, during an initial setting up of a magnetic field to entrap magnetic material within the matrix element of each race. A preferred retainer mechanism is provided which facilitates mounting of flap members for use in association with a cover mechanism, as well as retention of the matrix material in a desired position. In a preferred embodiment, the previous features are incorporated into a system fed with an ore material from an inner portion of a circular race, i. e. the center of a rotating drum.