GB1333999A - Apparatus for producing gypsum plaster by a double-calcining method - Google Patents

Apparatus for producing gypsum plaster by a double-calcining method

Info

Publication number
GB1333999A
GB1333999A GB4869671A GB4869671A GB1333999A GB 1333999 A GB1333999 A GB 1333999A GB 4869671 A GB4869671 A GB 4869671A GB 4869671 A GB4869671 A GB 4869671A GB 1333999 A GB1333999 A GB 1333999A
Authority
GB
United Kingdom
Prior art keywords
drum
gypsum plaster
double
screw
inlet
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
GB4869671A
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.)
Deutsche Babcock and Wilcox AG
Original Assignee
Deutsche Babcock and Wilcox 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 Deutsche Babcock and Wilcox AG filed Critical Deutsche Babcock and Wilcox AG
Publication of GB1333999A publication Critical patent/GB1333999A/en
Expired 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
    • C04B11/036—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln, i.e. to obtain beta-hemihydrate
    • 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)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

1333999 Rotary furnaces DEUTSCHE BABCOCK & WILCOX AG 20 Oct 1971 [24 Oct 1970] 48696/71 Heading F4B [Also in Division C1] A double calcining method for the production of gypsum plaster is carried out in apparatus comprising a rotary drum 1 with burner 5 and charge material screw feed 4 at opposite ends, an outer drum 2, openings 7 for the passage of treated material from drum 1 to drum 2, a gas inlet 9 and feed screw 11 at the inlet end of drum 2 and a gas outlet 10 and material hopper 12 at the opposite end of said drum 2. Rotary drum 1 has a gas outlet 6, waste gases from the drums combining together. The temperature in the region of burner 5 may be 1200‹ C. producing a variety of hydrates in the initially treated material including anhydrite. This mixes with fresh gypsum added by the screw 11 and the waste gases fed in by inlet 9 may be at about 700‹ C., leaving through outlet 10 at about 170‹ C., the finished gypsum plaster collecting in hopper 12.
GB4869671A 1970-10-24 1971-10-20 Apparatus for producing gypsum plaster by a double-calcining method Expired GB1333999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702052326 DE2052326C3 (en) 1970-10-24 1970-10-24 Equipment for the production of plaster of paris in the double-firing process

Publications (1)

Publication Number Publication Date
GB1333999A true GB1333999A (en) 1973-10-17

Family

ID=5786070

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4869671A Expired GB1333999A (en) 1970-10-24 1971-10-20 Apparatus for producing gypsum plaster by a double-calcining method

Country Status (4)

Country Link
BE (1) BE774320A (en)
DE (1) DE2052326C3 (en)
FR (1) FR2113045A5 (en)
GB (1) GB1333999A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8300410A1 (en) * 1981-12-22 1982-11-01 Monterde A Talleres Calorifically highly efficient rotary furnace for producing burned gypsum.

Also Published As

Publication number Publication date
FR2113045A5 (en) 1972-06-23
BE774320A (en) 1972-02-14
DE2052326A1 (en) 1972-04-27
DE2052326B2 (en) 1974-11-21
DE2052326C3 (en) 1975-07-03

Similar Documents

Publication Publication Date Title
SE7506871L (en) PROCEDURE AND DEVICE FOR CALCINATION OF POWDERED MATERIAL.
ES436053A1 (en) Method and apparatus for manufacturing cement clinker
GB1453215A (en) Calcination of pulverous material
ES452580A1 (en) Installation for the manufacture of cement
GB1399553A (en) Calcination of gypsum
ES434104A1 (en) Rotary kiln plant
ES432269A1 (en) Calcining calcium sulphate dihydrate
GB1506733A (en) Method of treating raw material for producing cement
GB1454877A (en) Apparatus for burning cement raw materials
GB1333999A (en) Apparatus for producing gypsum plaster by a double-calcining method
ES452401A1 (en) Rotary kiln plant
ES445579A1 (en) Manufacture of Portland cement
ES472350A1 (en) Method and apparatus for the thermal treatment of fine-grained material with hot gases
CH408751A (en) Process for heat exchange between the powdery raw material and the exhaust gases of a cement rotary kiln and device for carrying out this process
GB1390098A (en) Process for obtaining a building material containing hydrated lime and plaster
ES402371A1 (en) Method for manufacturing cement clinker
SE7510145L (en) PROCEDURE AND APPARATUS FOR THE PRODUCTION OF AN ORGANIC BINDER
GB1206193A (en) Method and plant for producing cement
ES274865A2 (en) Process for pretreatment of ores in rotary kiln
GB1090706A (en) Apparatus for heat treatment of pulverulous materials
GB1204233A (en) Installations for the heat treatment of mineral materials
ES436518A1 (en) Method of and apparatus for the firing of gypsum
GB1100530A (en) Plants for preheating and burning cement raw meal
GB781984A (en) Improvements in or relating to a process for burning cement, lime and the like in shaft kilns
ES456829A1 (en) Device for controlling the gas temperature in the drying chamber of a moving grate preheater for cement clinker production

Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years