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EP0258054A3 - Magnetic purification of slurries - Google Patents

Magnetic purification of slurries Download PDF

Info

Publication number
EP0258054A3
EP0258054A3 EP87307590A EP87307590A EP0258054A3 EP 0258054 A3 EP0258054 A3 EP 0258054A3 EP 87307590 A EP87307590 A EP 87307590A EP 87307590 A EP87307590 A EP 87307590A EP 0258054 A3 EP0258054 A3 EP 0258054A3
Authority
EP
European Patent Office
Prior art keywords
suspension
matrix
retained
flush liquid
impurities
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
EP87307590A
Other versions
EP0258054B1 (en
EP0258054A2 (en
Inventor
Mitchell J. Willis
Glen Alton Hemstock
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.)
BASF Catalysts LLC
Original Assignee
Engelhard Corp
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
Priority claimed from US06/900,666 external-priority patent/US4784758A/en
Priority claimed from US06/938,205 external-priority patent/US4781298A/en
Application filed by Engelhard Corp filed Critical Engelhard Corp
Publication of EP0258054A2 publication Critical patent/EP0258054A2/en
Publication of EP0258054A3 publication Critical patent/EP0258054A3/en
Application granted granted Critical
Publication of EP0258054B1 publication Critical patent/EP0258054B1/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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/032—Matrix cleaning systems

Landscapes

  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

A process which is especially useful for effecting magnetic separation of magnetically attractable impurities from an aqueous clay slurry or suspension includes passing the suspension (42) through a porous, ferromagnetic matrix while applying a magnetic field to the matrix (10), on which impurities are collected, and thereafter regenerating the matrix by flushing collected impurities therefrom with a flush liquid (26), e.g. water. The improvement comprises, after discontinuing the passage of the suspension through the matrix, but before passing flush liquid therethrough, admitting a pressurized gas (68) e.g. compressed air, into the separator to displace suspension retained therein, and recovering the displaced suspension. In addition, flush liquid retained in the matrix after the flushing step may be displaced therefrom by the compressed air. By displacing the retained suspension from the matrix with compressed gas instead of flush liquid the retained suspension is not diluted and is recovered instead of sewered as in the prior art processes.
EP87307590A 1986-08-27 1987-08-27 Magnetic purification of slurries Expired - Lifetime EP0258054B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US06/900,666 US4784758A (en) 1986-08-27 1986-08-27 Process for removing magnetic particles from a suspension of solids in a liquid
US900666 1986-08-27
US91614986A 1986-10-07 1986-10-07
US916149 1986-10-07
US938205 1986-12-03
US06/938,205 US4781298A (en) 1986-10-07 1986-12-03 Process for beneficiating clay at high solids

Publications (3)

Publication Number Publication Date
EP0258054A2 EP0258054A2 (en) 1988-03-02
EP0258054A3 true EP0258054A3 (en) 1989-10-04
EP0258054B1 EP0258054B1 (en) 1995-02-15

Family

ID=27420585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87307590A Expired - Lifetime EP0258054B1 (en) 1986-08-27 1987-08-27 Magnetic purification of slurries

Country Status (4)

Country Link
EP (1) EP0258054B1 (en)
AT (1) ATE118370T1 (en)
DE (1) DE3751058T2 (en)
ES (1) ES2068185T3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819515A (en) * 1972-08-28 1974-06-25 J Allen Magnetic separator
US3838773A (en) * 1973-03-16 1974-10-01 Massachusetts Inst Technology Vibrating-matrix magnetic separators
US4087358A (en) * 1976-10-12 1978-05-02 J. M. Huber Corporation Augmenting and facilitating flushing in magnetic separation
DE2650925A1 (en) * 1976-11-08 1978-05-11 Kloeckner Humboldt Deutz Ag METHOD AND DEVICE FOR CLEANING THE MATRIX OF A MAGNETIC SEPARATOR

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0722658B2 (en) * 1985-05-31 1995-03-15 大同特殊鋼株式会社 Electromagnetic filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819515A (en) * 1972-08-28 1974-06-25 J Allen Magnetic separator
US3838773A (en) * 1973-03-16 1974-10-01 Massachusetts Inst Technology Vibrating-matrix magnetic separators
US4087358A (en) * 1976-10-12 1978-05-02 J. M. Huber Corporation Augmenting and facilitating flushing in magnetic separation
DE2650925A1 (en) * 1976-11-08 1978-05-11 Kloeckner Humboldt Deutz Ag METHOD AND DEVICE FOR CLEANING THE MATRIX OF A MAGNETIC SEPARATOR

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 11, no. 139 (C-420)[2586], 7th May 1987; & JP-A-61 278 316 (DAIDO STEEL CO., LTD) 09-12-1986 *

Also Published As

Publication number Publication date
ES2068185T3 (en) 1995-04-16
ATE118370T1 (en) 1995-03-15
DE3751058D1 (en) 1995-03-23
EP0258054B1 (en) 1995-02-15
EP0258054A2 (en) 1988-03-02
DE3751058T2 (en) 1995-09-07

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