GB244078A - A new or improved process for obtaining products from gypsum - Google Patents

A new or improved process for obtaining products from gypsum

Info

Publication number
GB244078A
GB244078A GB29564/25A GB2956425A GB244078A GB 244078 A GB244078 A GB 244078A GB 29564/25 A GB29564/25 A GB 29564/25A GB 2956425 A GB2956425 A GB 2956425A GB 244078 A GB244078 A GB 244078A
Authority
GB
United Kingdom
Prior art keywords
calcium
proportions
cement
silica
steam
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
GB29564/25A
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.)
Rhenania Verein Chemischer Fabriken AG
Original Assignee
Rhenania Verein Chemischer Fabriken 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 Rhenania Verein Chemischer Fabriken AG filed Critical Rhenania Verein Chemischer Fabriken AG
Publication of GB244078A publication Critical patent/GB244078A/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)
  • Silicon Compounds (AREA)

Abstract

Calcium sulphate is heated with silica or with a siliceous material such as argillaceous shale, in a stream of heating gases of neutral or oxidizing character containing at least 15 per cent of steam, to a temperature of 1100 DEG C. or more so as to obtain sulphur dioxide and calcium silicate or cement. The proportions may be such that a mono-calcium or di-calcium silicate is produced. When argillaceous shale or the like is used the proportions may be such as to yield a cement, i.e. such as to give a final product containing two parts of calcium oxide to one part of silica, alumina and iron oxide taken together. The heating may be effected with a fuel containing a large proportion of hydrogen such as oil, or producer-gas from lignite, in which case steam from a separate source is unnecessary.ALSO:Calcium sulphate is heated with silica or with a siliceous material such as argillaceous shale, in a stream of heating gases of neutral or oxidizing character containing at least 15 per cent of steam to a temperature of 1100 DEG C. or more so as to obtain sulphur dioxide and calcium silicate or cement. The proportions may be such that a mono-calcium or di-calcium silicate is produced. When argillaceous shale or the like is used the proportions may be such as to yield a cement, i.e., such as to give a final product containing two parts of calcium oxide to one part of silica, alumina and iron oxide taken together. The heating may be effected with a fuel containing a large proportion of hydrogen such as oil, or producer-gas from lignite, in which case steam from a separate source is unnecessary.
GB29564/25A 1924-12-02 1925-11-23 A new or improved process for obtaining products from gypsum Expired GB244078A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE244078X 1924-12-02

Publications (1)

Publication Number Publication Date
GB244078A true GB244078A (en) 1926-11-04

Family

ID=5924062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29564/25A Expired GB244078A (en) 1924-12-02 1925-11-23 A new or improved process for obtaining products from gypsum

Country Status (1)

Country Link
GB (1) GB244078A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104843799A (en) * 2015-04-12 2015-08-19 耿兆翔 Method for separating and recovering powder alumina or/and calcium oxide in iron oxide powder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104843799A (en) * 2015-04-12 2015-08-19 耿兆翔 Method for separating and recovering powder alumina or/and calcium oxide in iron oxide powder

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