ES419558A1 - Production of plaster - Google Patents

Production of plaster

Info

Publication number
ES419558A1
ES419558A1 ES419558A ES419558A ES419558A1 ES 419558 A1 ES419558 A1 ES 419558A1 ES 419558 A ES419558 A ES 419558A ES 419558 A ES419558 A ES 419558A ES 419558 A1 ES419558 A1 ES 419558A1
Authority
ES
Spain
Prior art keywords
gypsum
mixture
artificial
stage
stream
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
ES419558A
Other languages
Spanish (es)
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.)
CHEMIQUES DES CHARBONNAGES SOC
Air Industrie SA
Original Assignee
CHEMIQUES DES CHARBONNAGES SOC
Air Industrie SA
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 CHEMIQUES DES CHARBONNAGES SOC, Air Industrie SA filed Critical CHEMIQUES DES CHARBONNAGES SOC
Publication of ES419558A1 publication Critical patent/ES419558A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/466—Conversion of one form of calcium sulfate to another
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A procedure for preparing gypsum from artificial gypsum or previously purified and dried phosphoric gypsum, characterized by: in a first stage, dehydrating the artificial gypsum by means of an air stream, until obtaining a mixture of dehydrated artificial gypsum containing at least 25% by weight of anhydrite III; in a second stage, treating said mixture with the help of a stream of humid air, to transform all the anhydrite III contained in said mixture into beta hemihydrate. (Machine-translation by Google Translate, not legally binding)
ES419558A 1972-10-12 1973-10-11 Production of plaster Expired ES419558A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7236170A FR2202851B1 (en) 1972-10-12 1972-10-12

Publications (1)

Publication Number Publication Date
ES419558A1 true ES419558A1 (en) 1976-07-16

Family

ID=9105549

Family Applications (1)

Application Number Title Priority Date Filing Date
ES419558A Expired ES419558A1 (en) 1972-10-12 1973-10-11 Production of plaster

Country Status (13)

Country Link
JP (1) JPS4975496A (en)
BE (1) BE805808A (en)
BR (1) BR7307953D0 (en)
DE (1) DE2350772A1 (en)
ES (1) ES419558A1 (en)
FR (1) FR2202851B1 (en)
GB (1) GB1429259A (en)
IE (1) IE38376B1 (en)
IL (1) IL43439A (en)
IT (1) IT999642B (en)
LU (1) LU68591A1 (en)
NL (1) NL7314064A (en)
OA (1) OA04674A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140702A (en) * 1980-11-10 1984-12-05 Bpb Industries Plc Fluidised bed calcination
AU3354697A (en) * 1997-07-15 1999-02-10 Marceli Cyrkiewicz Method and apparatus for the processing of phosphate gypsum waste
FR3059574A1 (en) * 2016-12-07 2018-06-08 Ocp Sa PHOSPHOGYPSE EVACUATION SYSTEM
CN112811837B (en) * 2020-12-31 2023-06-16 湖北聚海环境科技有限公司 System equipment and method for dehydrating and drying phosphogypsum by using high-temperature waste heat of regenerated aggregate
CN113772979A (en) * 2021-09-15 2021-12-10 贵州中建建筑科研设计院有限公司 Reference phosphorus building gypsum and manufacturing method and application thereof

Also Published As

Publication number Publication date
OA04674A (en) 1980-07-31
IL43439A (en) 1976-08-31
IE38376B1 (en) 1978-03-01
FR2202851A1 (en) 1974-05-10
DE2350772A1 (en) 1974-04-18
GB1429259A (en) 1976-03-24
BE805808A (en) 1974-02-01
FR2202851B1 (en) 1978-12-29
LU68591A1 (en) 1973-12-14
JPS4975496A (en) 1974-07-22
NL7314064A (en) 1974-04-16
IE38376L (en) 1974-04-12
IL43439A0 (en) 1974-03-14
IT999642B (en) 1976-03-10
BR7307953D0 (en) 1974-07-25

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