GB1351690A - Process for control'ing the expulsion of luorine in the rpoduction of sulphuric acid and cement from waste calcium sulphate - Google Patents

Process for control'ing the expulsion of luorine in the rpoduction of sulphuric acid and cement from waste calcium sulphate

Info

Publication number
GB1351690A
GB1351690A GB1351690DA GB1351690A GB 1351690 A GB1351690 A GB 1351690A GB 1351690D A GB1351690D A GB 1351690DA GB 1351690 A GB1351690 A GB 1351690A
Authority
GB
United Kingdom
Prior art keywords
cement
expulsion
rpoduction
luorine
ing
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
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.)
SKW Stickstoffwerke Piesteritz GmbH
Original Assignee
SKW Stickstoffwerke Piesteritz GmbH
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 SKW Stickstoffwerke Piesteritz GmbH filed Critical SKW Stickstoffwerke Piesteritz GmbH
Publication of GB1351690A publication Critical patent/GB1351690A/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
    • C04B7/00—Hydraulic cements
    • C04B7/02—Portland cement
    • C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

1351690 Cement making STICKSTOFFWERK PIESTERITZ VEB 6 Aug 1971 37072/71 Heading C1H In producing H 2 SO 4 acid cement from waste gypsum obtained in the production of H 3 Pe 4 , the expulsion of fluorine is prevented by adding to the CaSe 4 containing raw meal (defined) or its components sufficient CaO at least partially to neutralize the H 3 Pe 4 liberated from the waste gypsum upon heating the raw meal, the degree of fluorine fixing corresponding to the amount of CaO added. Any Ca compound giving rise to CaO under the reaction conditions can be used. Calcination is in a reducing atmosphere.
GB1351690D 1971-08-06 1971-08-06 Process for control'ing the expulsion of luorine in the rpoduction of sulphuric acid and cement from waste calcium sulphate Expired GB1351690A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3707271 1971-08-06

Publications (1)

Publication Number Publication Date
GB1351690A true GB1351690A (en) 1974-05-01

Family

ID=10393502

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1351690D Expired GB1351690A (en) 1971-08-06 1971-08-06 Process for control'ing the expulsion of luorine in the rpoduction of sulphuric acid and cement from waste calcium sulphate

Country Status (1)

Country Link
GB (1) GB1351690A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees