EP0431965A3 - Magnetic separation of material using eddy currents - Google Patents

Magnetic separation of material using eddy currents Download PDF

Info

Publication number
EP0431965A3
EP0431965A3 EP19900313317 EP90313317A EP0431965A3 EP 0431965 A3 EP0431965 A3 EP 0431965A3 EP 19900313317 EP19900313317 EP 19900313317 EP 90313317 A EP90313317 A EP 90313317A EP 0431965 A3 EP0431965 A3 EP 0431965A3
Authority
EP
European Patent Office
Prior art keywords
particles
eddy currents
magnetic separation
magnetic field
conductivities
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19900313317
Other versions
EP0431965A2 (en
EP0431965B1 (en
Inventor
Edwin Harm Roos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of EP0431965A2 publication Critical patent/EP0431965A2/en
Publication of EP0431965A3 publication Critical patent/EP0431965A3/en
Application granted granted Critical
Publication of EP0431965B1 publication Critical patent/EP0431965B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/23—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/005—Pretreatment specially adapted for magnetic separation

Landscapes

  • Physical Or Chemical Processes And Apparatus (AREA)
  • Soft Magnetic Materials (AREA)
  • Glass Compositions (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Non-Insulated Conductors (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

Non-magnetic, conductive particles are separated from one another on the basis of their respective electrical conductivities. This is achieved by irradiating the particles with microwave or radio frequency electromagnetic radiation and simultaneously subjecting the particles to a magnetic field. The eddy currents induced in the particles by the electromagnetic irradiation interact with the magnetic field to cause movements of the particles which are dependent on their conductivities. <IMAGE>
EP90313317A 1989-12-07 1990-12-07 Magnetic separation of material using eddy currents Expired - Lifetime EP0431965B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA899361 1989-12-07
ZA899361 1989-12-07

Publications (3)

Publication Number Publication Date
EP0431965A2 EP0431965A2 (en) 1991-06-12
EP0431965A3 true EP0431965A3 (en) 1991-08-21
EP0431965B1 EP0431965B1 (en) 1994-06-15

Family

ID=25579930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90313317A Expired - Lifetime EP0431965B1 (en) 1989-12-07 1990-12-07 Magnetic separation of material using eddy currents

Country Status (7)

Country Link
EP (1) EP0431965B1 (en)
JP (1) JPH05345146A (en)
AT (1) ATE107194T1 (en)
AU (1) AU629073B2 (en)
BR (1) BR9006242A (en)
CA (1) CA2031663A1 (en)
DE (1) DE69009948T2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ243065A (en) 1991-06-13 1995-07-26 Lundbeck & Co As H Piperidine derivatives and pharmaceutical compositions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463310A (en) * 1968-02-27 1969-08-26 Us Interior Separation method
DE2336035A1 (en) * 1973-07-14 1975-02-06 Rosenthal Technik Ag Magnetic separation of minerals - under irradiation by high frequency in fluidised bed gives improved uniformity and selectivity
US4137156A (en) * 1975-03-21 1979-01-30 Occidental Petroleum Corporation Separation of non-magnetic conductive metals
US4842721A (en) * 1982-10-19 1989-06-27 Raytheon Company Transversely inclined ramp separator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5274167A (en) * 1975-12-16 1977-06-21 Agency Of Ind Science & Technol Recovery of metals out of solid waste pieces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463310A (en) * 1968-02-27 1969-08-26 Us Interior Separation method
DE2336035A1 (en) * 1973-07-14 1975-02-06 Rosenthal Technik Ag Magnetic separation of minerals - under irradiation by high frequency in fluidised bed gives improved uniformity and selectivity
US4137156A (en) * 1975-03-21 1979-01-30 Occidental Petroleum Corporation Separation of non-magnetic conductive metals
US4842721A (en) * 1982-10-19 1989-06-27 Raytheon Company Transversely inclined ramp separator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2, no. 43 (M-77)(4594) 23 March 1978, & JP-A-52 74167 (KOGYO GIJUTSUIN) 21 June 1977, *

Also Published As

Publication number Publication date
AU629073B2 (en) 1992-09-24
CA2031663A1 (en) 1991-06-08
JPH05345146A (en) 1993-12-27
AU6780790A (en) 1991-06-13
BR9006242A (en) 1991-09-24
DE69009948T2 (en) 1994-11-03
ATE107194T1 (en) 1994-07-15
DE69009948D1 (en) 1994-07-21
EP0431965A2 (en) 1991-06-12
EP0431965B1 (en) 1994-06-15

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