GB816606A - Method for the production of sintered magnesia articles from finely divided magnesium compounds - Google Patents

Method for the production of sintered magnesia articles from finely divided magnesium compounds

Info

Publication number
GB816606A
GB816606A GB25783/55A GB2578355A GB816606A GB 816606 A GB816606 A GB 816606A GB 25783/55 A GB25783/55 A GB 25783/55A GB 2578355 A GB2578355 A GB 2578355A GB 816606 A GB816606 A GB 816606A
Authority
GB
United Kingdom
Prior art keywords
magnesium
magnesium sulphate
magnesia
finely divided
hydroxide
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
GB25783/55A
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.)
Wintershall AG
Original Assignee
Wintershall 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 Wintershall AG filed Critical Wintershall AG
Publication of GB816606A publication Critical patent/GB816606A/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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite

Abstract

Sintered magnesia articles are produced by shaping finely divided magnesia or a finely divided compound of magnesium (other than magnesium sulphate) which decomposes thermally without melting to form magnesia into bodies of the desired form using 6-25 per cent by weight of the total magnesium content calculated as magnesia, of magnesium sulphate as a binder and heating said bodies above the sintering temperature (about 1100 DEG C.) to decompose the magnesium sulphate. Specified magnesium compounds are the carbonate, oxide and hydroxide, e.g. magnesite and brucite; a suitable magnesium hydroxide (which may contain sufficient magnesium sulphate) may be prepared by the process of Specification 693,108 or a mixture of oxide and hydroxide may be prepared by treating in aqueous suspension burned dolomite with an equivalent quantity of magnesium chloride and removing the so-formed calcium chloride liquor or a product already containing magnesium sulphate may be obtained by partly decomposing kieserite, e.g. in in a rotary kiln. The magnesium sulphate may be synthetic or natural, e.g. Epsom salt or kieserite. The shaped unsintered mixture of magnesium sulphate and other magnesium compound may contain 4-75 per cent by weight of water. A shaft or rotary kiln may be employed for the sintering, which should preferably be performed at a temperature rising to 1500-1600 DEG C.
GB25783/55A 1954-09-08 1955-09-08 Method for the production of sintered magnesia articles from finely divided magnesium compounds Expired GB816606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE816606X 1954-09-08

Publications (1)

Publication Number Publication Date
GB816606A true GB816606A (en) 1959-07-15

Family

ID=6735036

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25783/55A Expired GB816606A (en) 1954-09-08 1955-09-08 Method for the production of sintered magnesia articles from finely divided magnesium compounds

Country Status (1)

Country Link
GB (1) GB816606A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2529996A1 (en) * 1974-07-05 1976-02-05 Rasmussen O B HIGH-STRENGTH LAMINATE MADE FROM THERMOPLASTIC POLYMERIZED FILMS AND METHOD FOR ITS PRODUCTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2529996A1 (en) * 1974-07-05 1976-02-05 Rasmussen O B HIGH-STRENGTH LAMINATE MADE FROM THERMOPLASTIC POLYMERIZED FILMS AND METHOD FOR ITS PRODUCTION

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