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FR2098951A5 - Spheroidal granules of refractory material prodn - by two-stage pulverization of molten raw material - Google Patents

Spheroidal granules of refractory material prodn - by two-stage pulverization of molten raw material

Info

Publication number
FR2098951A5
FR2098951A5 FR7028385A FR7028385A FR2098951A5 FR 2098951 A5 FR2098951 A5 FR 2098951A5 FR 7028385 A FR7028385 A FR 7028385A FR 7028385 A FR7028385 A FR 7028385A FR 2098951 A5 FR2098951 A5 FR 2098951A5
Authority
FR
France
Prior art keywords
raw material
spheroidal
granules
prodn
molten raw
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
FR7028385A
Other languages
French (fr)
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.)
CGEC
Bpifrance Financement SA
Original Assignee
CGEC
Agence National de Valorisation de la Recherche ANVAR
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 CGEC, Agence National de Valorisation de la Recherche ANVAR filed Critical CGEC
Priority to FR7028385A priority Critical patent/FR2098951A5/en
Application granted granted Critical
Publication of FR2098951A5 publication Critical patent/FR2098951A5/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/653—Processes involving a melting step

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Refractory oxides and hydrated oxides, and mixtures of such refractories, can be converted into spheroidal granules of predetermined size between about 50 mu and several mm. by a consistently controllable pulverisation process. The raw material is first melted and allowed to run in thin, vertical streams through which are blasted jets of fluid under pressure to break up the streams and smash the material against a wall from which granules fall, taking up spheroidal form under surface tension as they harden and set, usually in a liquid quenching medium.
FR7028385A 1970-07-31 1970-07-31 Spheroidal granules of refractory material prodn - by two-stage pulverization of molten raw material Expired FR2098951A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7028385A FR2098951A5 (en) 1970-07-31 1970-07-31 Spheroidal granules of refractory material prodn - by two-stage pulverization of molten raw material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7028385A FR2098951A5 (en) 1970-07-31 1970-07-31 Spheroidal granules of refractory material prodn - by two-stage pulverization of molten raw material

Publications (1)

Publication Number Publication Date
FR2098951A5 true FR2098951A5 (en) 1972-03-10

Family

ID=9059616

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7028385A Expired FR2098951A5 (en) 1970-07-31 1970-07-31 Spheroidal granules of refractory material prodn - by two-stage pulverization of molten raw material

Country Status (1)

Country Link
FR (1) FR2098951A5 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455013A1 (en) * 1979-04-25 1980-11-21 Electricite De France Fired refractory fireclay - comprising spherical particles of high refractoriness
FR2524356A1 (en) * 1982-03-31 1983-10-07 Leybold Heraeus Gmbh & Co Kg PROCESS AND DEVICE FOR THE MANUFACTURE OF HIGH PURITY METAL POWDERS WITHOUT CERAMIC MATERIALS
FR2545202A1 (en) * 1983-04-29 1984-11-02 Commissariat Energie Atomique METHOD AND DEVICE FOR COOLING A MATERIAL AND APPLICATION TO THE PRODUCTION OF REFRACTORY MATERIALS BY TEMPERATURE
FR2548937A1 (en) * 1983-06-23 1985-01-18 Gen Electric PROCESS AND APPARATUS FOR MANUFACTURING POWDER ALLOY
EP0339478A3 (en) * 1988-04-29 1991-04-10 Norton Company Process and apparatus for rapid solidification of melted ceramic composition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455013A1 (en) * 1979-04-25 1980-11-21 Electricite De France Fired refractory fireclay - comprising spherical particles of high refractoriness
FR2524356A1 (en) * 1982-03-31 1983-10-07 Leybold Heraeus Gmbh & Co Kg PROCESS AND DEVICE FOR THE MANUFACTURE OF HIGH PURITY METAL POWDERS WITHOUT CERAMIC MATERIALS
FR2545202A1 (en) * 1983-04-29 1984-11-02 Commissariat Energie Atomique METHOD AND DEVICE FOR COOLING A MATERIAL AND APPLICATION TO THE PRODUCTION OF REFRACTORY MATERIALS BY TEMPERATURE
EP0125964A1 (en) * 1983-04-29 1984-11-21 Commissariat A L'energie Atomique Process and apparatus for cooling a material and application to the manufacture of refractory materials by tempering
FR2548937A1 (en) * 1983-06-23 1985-01-18 Gen Electric PROCESS AND APPARATUS FOR MANUFACTURING POWDER ALLOY
EP0339478A3 (en) * 1988-04-29 1991-04-10 Norton Company Process and apparatus for rapid solidification of melted ceramic composition

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Legal Events

Date Code Title Description
ST Notification of lapse