FR2445940A1 - Roasting of minerals, esp. gypsum, in multistorey furnace - which is divided into low temp. calcining zone and high temp. calcining zone with separate inlets and outlets - Google Patents

Roasting of minerals, esp. gypsum, in multistorey furnace - which is divided into low temp. calcining zone and high temp. calcining zone with separate inlets and outlets

Info

Publication number
FR2445940A1
FR2445940A1 FR7931948A FR7931948A FR2445940A1 FR 2445940 A1 FR2445940 A1 FR 2445940A1 FR 7931948 A FR7931948 A FR 7931948A FR 7931948 A FR7931948 A FR 7931948A FR 2445940 A1 FR2445940 A1 FR 2445940A1
Authority
FR
France
Prior art keywords
gypsum
calcining zone
temp
zone
furnace
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.)
Pending
Application number
FR7931948A
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of FR2445940A1 publication Critical patent/FR2445940A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C04B11/00—Calcium sulfate cements
    • C04B11/02—Methods and apparatus for dehydrating gypsum
    • C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained

Abstract

Gypsum is pref. fed into the top end of a furnace divided into two zones, viz. an upper zone using low calcining temp., and lower zone using high calcining temp. At least part of the gypsum is removed after travelling through the upper zone. Crude gypsum may also be fed directly into top end of lower zone. Two types of roasted gypsum of obtd. are pref. fed into a mixer. Pref. furnace has two outlets for roasted gypsum, one outlet being located at the bottom end of each zone. Alternatively, mixing of two types of roasted gypsum occurs in lower, high temp. calcining zone. Lump gypsum and/or plaster gypsum can be made with a precise degree of calcining.
FR7931948A 1979-01-02 1979-12-28 Roasting of minerals, esp. gypsum, in multistorey furnace - which is divided into low temp. calcining zone and high temp. calcining zone with separate inlets and outlets Pending FR2445940A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792900052 DE2900052A1 (en) 1979-01-02 1979-01-02 METHOD AND INSTALLATION FOR THE HEAT TREATMENT OF MINERAL GOODS, IN PARTICULAR FOR THE BURNING OF PLASTER

Publications (1)

Publication Number Publication Date
FR2445940A1 true FR2445940A1 (en) 1980-08-01

Family

ID=6059982

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7931948A Pending FR2445940A1 (en) 1979-01-02 1979-12-28 Roasting of minerals, esp. gypsum, in multistorey furnace - which is divided into low temp. calcining zone and high temp. calcining zone with separate inlets and outlets

Country Status (7)

Country Link
JP (1) JPS5595653A (en)
AU (1) AU5365379A (en)
DE (1) DE2900052A1 (en)
ES (1) ES8100231A1 (en)
FR (1) FR2445940A1 (en)
IT (1) IT1126860B (en)
PL (1) PL220806A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2572721A1 (en) * 1984-11-08 1986-05-09 Delagne Christian Process and plant for the preparation of high-strength plaster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6253095B2 (en) * 2014-02-26 2017-12-27 日工株式会社 Heat regeneration treatment apparatus and treatment method for waste gypsum

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE255648C (en) *
FR856316A (en) * 1939-02-24 1940-06-11 Plaster manufacturing process
FR1228722A (en) * 1958-06-26 1960-09-02 Pfeiffer Barbarossawerke A G G Device for dewatering raw gypsum
FR1386464A (en) * 1963-12-12 1965-01-22 Lambert Freres & Cie Gypsum firing process
DE1433860A1 (en) * 1962-04-18 1969-02-06 Miguel De Monterde Process for the production of gypsum in a continuous working process, and a rotating furnace for the execution of this process
DE2529847A1 (en) * 1975-07-04 1977-01-27 Kloeckner Humboldt Deutz Ag FLOOR FURNACE FOR THE THERMAL TREATMENT OF SLUDGE MATERIALS, IN PARTICULAR MAGNESITHYDRATE SLUDGE
FR2390393A1 (en) * 1977-05-14 1978-12-08 Babcock Bsh Ag Continuous gypsum calcining process - in rotary kiln using precisely metered fine and granular fractions in counterflow

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE255648C (en) *
FR856316A (en) * 1939-02-24 1940-06-11 Plaster manufacturing process
FR1228722A (en) * 1958-06-26 1960-09-02 Pfeiffer Barbarossawerke A G G Device for dewatering raw gypsum
DE1433860A1 (en) * 1962-04-18 1969-02-06 Miguel De Monterde Process for the production of gypsum in a continuous working process, and a rotating furnace for the execution of this process
FR1386464A (en) * 1963-12-12 1965-01-22 Lambert Freres & Cie Gypsum firing process
DE2529847A1 (en) * 1975-07-04 1977-01-27 Kloeckner Humboldt Deutz Ag FLOOR FURNACE FOR THE THERMAL TREATMENT OF SLUDGE MATERIALS, IN PARTICULAR MAGNESITHYDRATE SLUDGE
FR2390393A1 (en) * 1977-05-14 1978-12-08 Babcock Bsh Ag Continuous gypsum calcining process - in rotary kiln using precisely metered fine and granular fractions in counterflow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2572721A1 (en) * 1984-11-08 1986-05-09 Delagne Christian Process and plant for the preparation of high-strength plaster

Also Published As

Publication number Publication date
ES487297A0 (en) 1980-11-01
IT1126860B (en) 1986-05-21
AU5365379A (en) 1980-07-10
DE2900052A1 (en) 1980-07-10
IT8047508A0 (en) 1980-01-02
JPS5595653A (en) 1980-07-21
ES8100231A1 (en) 1980-11-01
PL220806A1 (en) 1980-09-08

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