GB924046A - Improvements in or relating to the screening of substances which have a tendency to become electrostatically charged - Google Patents

Improvements in or relating to the screening of substances which have a tendency to become electrostatically charged

Info

Publication number
GB924046A
GB924046A GB22293/60A GB2229360A GB924046A GB 924046 A GB924046 A GB 924046A GB 22293/60 A GB22293/60 A GB 22293/60A GB 2229360 A GB2229360 A GB 2229360A GB 924046 A GB924046 A GB 924046A
Authority
GB
United Kingdom
Prior art keywords
tendency
electrostatically charged
screening
relating
substances
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.)
Expired
Application number
GB22293/60A
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.)
Lonza Electric and Chemical Works Ltd
Original Assignee
Lonza Electric and Chemical Works 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 Lonza Electric and Chemical Works Ltd filed Critical Lonza Electric and Chemical Works Ltd
Publication of GB924046A publication Critical patent/GB924046A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force

Abstract

Pulverulent material, e.g. plastic powder, which has a tendency to become electrostatically charged, is screened in a screening box within which the atmosphere is at a temperature of 5-50 DEG C. and has a relative humidity of from 95-100%, the material being supplied to the screen at a lower temperature, e.g. of from 0.5-5 DEG C. below the stated temperature.
GB22293/60A 1959-07-01 1960-06-24 Improvements in or relating to the screening of substances which have a tendency to become electrostatically charged Expired GB924046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7519559A CH373625A (en) 1959-07-01 1959-07-01 Method for sieving electrostatically chargeable substances, in particular plastic powders

Publications (1)

Publication Number Publication Date
GB924046A true GB924046A (en) 1963-04-18

Family

ID=4533969

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22293/60A Expired GB924046A (en) 1959-07-01 1960-06-24 Improvements in or relating to the screening of substances which have a tendency to become electrostatically charged

Country Status (4)

Country Link
US (1) US3161587A (en)
CH (1) CH373625A (en)
ES (1) ES259328A1 (en)
GB (1) GB924046A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341009A (en) * 1964-09-11 1967-09-12 Phillips Petroleum Co Method and apparatus for separating fines adhering to pellets
US3620368A (en) * 1969-06-02 1971-11-16 Dart Ind Inc Classification of dry polymer beads
US4013550A (en) * 1975-07-22 1977-03-22 United States Steel Corporation Manufacture of thermoplastic resin beads
US4957010A (en) * 1989-07-25 1990-09-18 W. R. Grace & Co.-Conn. Method and apparatus for determining particle size distribution
US4989464A (en) * 1989-07-25 1991-02-05 W. R. Grace & Co.-Conn. Method and apparatus for determining particle size distribution
US5352390A (en) * 1989-07-25 1994-10-04 W. R. Grace & Co.-Conn. Cementitious compositions containing shredded polystyrene aggregate
US11559828B2 (en) 2020-02-07 2023-01-24 Chad M. Johnson Plant product extraction apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA522516A (en) * 1956-03-13 M. Burstlein Eugene Process for screening fine moist materials
DE966422C (en) * 1954-06-02 1957-08-01 Emmericher Maschinenfabrik Von Procedure for sorting seeds or fruits

Also Published As

Publication number Publication date
ES259328A1 (en) 1960-11-16
US3161587A (en) 1964-12-15
CH373625A (en) 1963-11-30

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