FR2267991A1 - Expanded minerals, esp. vermiculite and perlite mfr. - using continuous fluidised bed comprising heating and cooling zones - Google Patents

Expanded minerals, esp. vermiculite and perlite mfr. - using continuous fluidised bed comprising heating and cooling zones

Info

Publication number
FR2267991A1
FR2267991A1 FR7413348A FR7413348A FR2267991A1 FR 2267991 A1 FR2267991 A1 FR 2267991A1 FR 7413348 A FR7413348 A FR 7413348A FR 7413348 A FR7413348 A FR 7413348A FR 2267991 A1 FR2267991 A1 FR 2267991A1
Authority
FR
France
Prior art keywords
heating
degrees
grid
mfr
esp
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.)
Withdrawn
Application number
FR7413348A
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.)
RETIF CLAUDE
Original Assignee
RETIF CLAUDE
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 RETIF CLAUDE filed Critical RETIF CLAUDE
Priority to FR7413348A priority Critical patent/FR2267991A1/en
Publication of FR2267991A1 publication Critical patent/FR2267991A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
    • C04B20/065—Expanding clay, perlite, vermiculite or like granular materials in fluidised beds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Cultivation Of Plants (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

In the mfr. of expanded mineral particles by thermal treatment, particles 0.1-20mm. in size travelling continuously along a fluidised bed contg. a heating- and a cooling-zone are used, the fluidising agent being gas with a sufficiently high temp. to expose the interior of the particles to thermal shock, and the bed consisting of a porous element, sieve or grid. The hot gas is blown up through the grid upstream of the treatment zone, and a cooling gas is blown up through the grid at an intermediate point in the treatment zone; and a uniform temp. is maintained at the same transverse height across the grid. Method is esp. used in the prodn. of exfoliated vermiculite at 400-600 degrees C using hot gas at 1200-1400 degrees C; or expanded perlite by heating at 900-1000 degrees C using hot gas at 1200-1400 degrees C.
FR7413348A 1974-04-17 1974-04-17 Expanded minerals, esp. vermiculite and perlite mfr. - using continuous fluidised bed comprising heating and cooling zones Withdrawn FR2267991A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7413348A FR2267991A1 (en) 1974-04-17 1974-04-17 Expanded minerals, esp. vermiculite and perlite mfr. - using continuous fluidised bed comprising heating and cooling zones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7413348A FR2267991A1 (en) 1974-04-17 1974-04-17 Expanded minerals, esp. vermiculite and perlite mfr. - using continuous fluidised bed comprising heating and cooling zones

Publications (1)

Publication Number Publication Date
FR2267991A1 true FR2267991A1 (en) 1975-11-14

Family

ID=9137722

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7413348A Withdrawn FR2267991A1 (en) 1974-04-17 1974-04-17 Expanded minerals, esp. vermiculite and perlite mfr. - using continuous fluidised bed comprising heating and cooling zones

Country Status (1)

Country Link
FR (1) FR2267991A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165040A2 (en) * 1984-06-08 1985-12-18 Lightweight Processing Co. Process and apparatus for forming lightweight aggregate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165040A2 (en) * 1984-06-08 1985-12-18 Lightweight Processing Co. Process and apparatus for forming lightweight aggregate
EP0165040A3 (en) * 1984-06-08 1986-12-30 Lightweight Processing Co. Process and apparatus for forming lightweight aggregate

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Legal Events

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