GB1339644A - Process and equipment for drying ceramic pastes using microwave heating - Google Patents

Process and equipment for drying ceramic pastes using microwave heating

Info

Publication number
GB1339644A
GB1339644A GB117271A GB117271A GB1339644A GB 1339644 A GB1339644 A GB 1339644A GB 117271 A GB117271 A GB 117271A GB 117271 A GB117271 A GB 117271A GB 1339644 A GB1339644 A GB 1339644A
Authority
GB
United Kingdom
Prior art keywords
enclosure
band
microwave
articles
cavity
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
GB117271A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1339644A publication Critical patent/GB1339644A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/78—Arrangements for continuous movement of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/241—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening using microwave heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04—Heating using microwaves
    • H05B2206/046—Microwave drying of wood, ink, food, ceramic, sintering of ceramic, clothes, hair
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Microbiology (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Ceramic Engineering (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

1339644 Drying moulded articles INTERNATIONAL STANDARD ELECTRIC CORP 11 Jan 1971 [14 Jan 1970] 1172/71 Heading F4G A wet moulded article of ceramic ware is predried (so that it can be separated from its mould and handled without damage) by maintaining the wet article throughout at a predetermined temperature (65‹ C.) by absorption of microwaves in the material and water of the article, while removing water by evaporation by a forced draught of dry air at a higher temperature. Batches of articles are carried on an intermittently-operated conveyer band(s) 4 relative to which a microwave enclosure 11 may be raised and lowered by means of an hydraulic jack 6a. Each batch of articles is carried on the band 4 under the raised enclosure 11 which is then lowered so that the articles occupy a highenergy microwave cavity 14 where they are heated to the predetermined temperature by the microwave sources 12. The enclosure 11 is then raised so that the articles are advanced by the band 4 into a low-energy microwave cavity 15 where they are maintained at the predetermined temperature by the microwave sources 12<SP>1</SP>. Heated dry air is supplied to the microwave cavities 14 and 15 by means of a source 9 (which may be a suction pump) supplying a main duct 22, branch ducts 19 and 19<SP>1</SP>, hoods 20 and 20<SP>1</SP>, and enclosure holes 21 and 21<SP>1</SP>. The air is extracted through enclosure holes 26 and 26<SP>1</SP>, hoods 25 and 25<SP>1</SP>, branch ducts 27 and 27<SP>1</SP>, and a main duct (not shown) by means of an extractor 9<SP>1</SP>. Shutters 24 and 24<SP>1</SP>, 28 and 28<SP>1</SP> are adjusted so that more air flows to the cavity 15 than to the cavity 14, and a slight overpressure is maintained in the enclosure 11. Each microwave source 12 or 12<SP>1</SP> comprises a magnetron coupled to a section of waveguide coupled by slots to the cavity 14 or 15. Each magnetron may be water-cooled, or air-cooled by the air supplied to the hoods 20 and 20<SP>1</SP>. A moving reflector in the waveguide continuously alters the standing wave patterns. The articles (on their moulds) are placed manually or automatically on a platform having feet raising it above the band 4, the platform being made of low dielectric losses plastics material and the enclosure and band being metal. The stainless steel band 4 may be provided with plastics projections for engaging footless platforms. The band 4 may be replaced by two spaced metal ribbons provided with projections and sliding over a fixed metal plate. Metal braid 18 on the enclosure 11 seals to the band 4 to prevent leakage of radiation. A security device prevents raising of the enclosure 11 before the magnetrons are de-energized, and a pressure-sensitive device ensures that the enclosure is fully lowered. The hoods 20 and 20<SP>1</SP> may only cover the spaces between the sources 12 and 12<SP>1</SP>. Each batch remains in each cavity 14 and 15 for 30 sec. and raising and lowering of the enclosure 11 takes 60 sec. Five or eight sources 12 or 12<SP>1</SP> may be used.
GB117271A 1970-01-14 1971-01-11 Process and equipment for drying ceramic pastes using microwave heating Expired GB1339644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7001187A FR2076405A5 (en) 1970-01-14 1970-01-14

Publications (1)

Publication Number Publication Date
GB1339644A true GB1339644A (en) 1973-12-05

Family

ID=9048999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB117271A Expired GB1339644A (en) 1970-01-14 1971-01-11 Process and equipment for drying ceramic pastes using microwave heating

Country Status (5)

Country Link
US (1) US3704523A (en)
DE (1) DE2101104A1 (en)
ES (1) ES387205A1 (en)
FR (1) FR2076405A5 (en)
GB (1) GB1339644A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL423660A1 (en) * 2017-11-30 2019-06-03 Qbig Ireneusz Slodkowski I Wspolnicy Spolka Komandytowa Method for production of ceramic moulds for precision casting

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US3935060A (en) * 1973-10-25 1976-01-27 Mcdonnell Douglas Corporation Fibrous insulation and process for making the same
US4057702A (en) * 1973-10-31 1977-11-08 Automatisme & Technique Process and plant for the fritting of ceramic products
US4043380A (en) * 1973-11-28 1977-08-23 Valentine Match Plate Company Production of plaster molds by microwave treatment
US3953703A (en) * 1974-10-03 1976-04-27 Materials Research Corporation Method for drying ceramic tape
US4259560A (en) * 1977-09-21 1981-03-31 Rhodes George W Process for drying coal and other conductive materials using microwaves
US4210793A (en) * 1978-03-06 1980-07-01 Agence Nationale De Valorisation De La Recherche (Anvar) Microwave applicator for radiating microwaves to an elongated zone
US4176267A (en) * 1978-05-12 1979-11-27 Armstrong Cork Company Microwave energy trap
US4180918A (en) * 1978-10-06 1980-01-01 Caterpillar Tractor Co. Microwave drying of ceramic shell molds
ATE3955T1 (en) * 1979-10-05 1983-07-15 Heinrich Wagner Maschinenfabrik Gmbh & Co DEVICE FOR DRYING FOUNDRY MOLDS AND CORE.
NL8103118A (en) * 1981-06-29 1983-01-17 Belge Etat MODULAR INDUSTRIAL MICROWAVE OVEN FOR THERMAL TREATMENT OF SUBSTANCES.
JPS6311580A (en) * 1986-06-30 1988-01-19 株式会社豊田中央研究所 Ceramics joining equipment
WO1988001825A1 (en) * 1986-09-05 1988-03-10 Jiri Dokoupil Installation for heat treatment, in particular for drying leather and similar
US4728531A (en) * 1986-11-04 1988-03-01 Ford Motor Company Method of drying refractory coated foam patterns
DE3711184A1 (en) * 1987-04-02 1988-10-20 Leybold Ag DEVICE FOR THE APPLICATION OF MICROWAVE ENERGY WITH AN OPEN MICROWAVE LEAD
DE3811063A1 (en) * 1988-03-31 1989-10-19 Berstorff Gmbh Masch Hermann DEVICE FOR CONTINUOUSLY HEATING, PASTEURIZING OR STERILIZING FOOD OR THE LIKE
FR2661978A1 (en) * 1990-05-14 1991-11-15 Marzat Claude METHOD AND DEVICE FOR RAPID DRYING OF A FRAGILEABLE MATERIAL BY APPLYING MICROWAVES
US5222544A (en) * 1991-08-12 1993-06-29 Ford Motor Company Bonding casting cores
US5378319A (en) * 1993-05-07 1995-01-03 Tran Industrial Research Inc. Lime mud calcining using dielectric hysteresis heating
US5541390A (en) * 1995-03-20 1996-07-30 Cidelcem Industries Tunnel oven for microwave heating and cooking foods
DE69841870D1 (en) * 1997-04-10 2010-10-14 Nucon Systems Inc METHOD OF PRODUCING CERAMIC OBJECTS WITH THICK WALLS
EP1249156A4 (en) 1999-12-28 2004-11-17 Corning Inc Hybrid method for firing of ceramics
US6344635B2 (en) 1999-12-28 2002-02-05 Corning Incorporated Hybrid method for firing of ceramics
JP4133252B2 (en) * 2002-11-19 2008-08-13 株式会社デンソー Method and apparatus for drying ceramic molded body
US20040206755A1 (en) * 2003-04-18 2004-10-21 Hadinger Peter James Microwave heating using distributed semiconductor sources
JP4527963B2 (en) * 2003-11-04 2010-08-18 日本碍子株式会社 Microwave drying method
RU2366689C2 (en) * 2003-12-12 2009-09-10 Коултэк Корпорейшн Methodology of dry concentration before combustion and systems for improvement of solid fuel characteristics
DE102004048451A1 (en) * 2004-10-05 2006-04-06 Mk Technology Gmbh Method and system for producing a shell mold, in particular for investment casting
US8653482B2 (en) * 2006-02-21 2014-02-18 Goji Limited RF controlled freezing
WO2007108076A1 (en) * 2006-03-17 2007-09-27 Ibiden Co., Ltd. Drying device, method of drying ceramic molding, and method of producing honeycomb structure body
KR101489004B1 (en) * 2006-03-31 2015-02-02 제이와이 캐피탈 인베스트먼트 엘엘씨 Methods and systems for enhancing solid fuel properties
US8585788B2 (en) * 2006-03-31 2013-11-19 Coaltek, Inc. Methods and systems for processing solid fuel
US8585786B2 (en) * 2006-03-31 2013-11-19 Coaltek, Inc. Methods and systems for briquetting solid fuel
US9239188B2 (en) * 2008-05-30 2016-01-19 Corning Incorporated System and method for drying of ceramic greenware
US8481900B2 (en) * 2009-11-25 2013-07-09 Corning Incorporated Methods for drying ceramic materials
TWI414587B (en) * 2010-01-11 2013-11-11 Nat Applied Res Laboratoires Method for enhancing evaporation of solution
US9038284B2 (en) * 2011-11-29 2015-05-26 Corning Incorporated Systems and methods for efficient microwave drying of extruded honeycomb structures
KR101290570B1 (en) * 2012-03-06 2013-07-31 삼성코닝정밀소재 주식회사 High frequency heating apparatus
US9429361B2 (en) * 2012-11-27 2016-08-30 Corning Incorporated Systems and methods for adaptive microwave drying of ceramic articles
FR3024039B1 (en) * 2014-07-22 2018-09-14 Amb Sa SYSTEM FOR CONTINUOUS PROCESSING OF THERMALLY PRODUCED PRODUCTS
CN106016986B (en) * 2016-05-06 2021-02-05 电子科技大学 Lignite drying and upgrading line with metal reflecting plate
US11412584B2 (en) 2017-12-08 2022-08-09 Alkar-Rapidpak, Inc. Ovens with metallic belts and microwave launch box assemblies for processing food products

Family Cites Families (4)

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US3409447A (en) * 1966-11-28 1968-11-05 Cryodry Corp Treating food products with microwave energy and hot gas of decreasing humidity
US3460265A (en) * 1967-02-14 1969-08-12 Horace L Smith Jr Methods of drying
US3474544A (en) * 1967-07-07 1969-10-28 Coe Mfg Co The Veneer dryer with plural treating zones
US3434220A (en) * 1967-10-10 1969-03-25 Exxon Research Engineering Co Microwave drying process for synthetic polymers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL423660A1 (en) * 2017-11-30 2019-06-03 Qbig Ireneusz Slodkowski I Wspolnicy Spolka Komandytowa Method for production of ceramic moulds for precision casting

Also Published As

Publication number Publication date
US3704523A (en) 1972-12-05
FR2076405A5 (en) 1971-10-15
DE2101104A1 (en) 1971-07-22
ES387205A1 (en) 1973-12-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee