GB508736A - Improvements in and relating to the manufacture of cement - Google Patents

Improvements in and relating to the manufacture of cement

Info

Publication number
GB508736A
GB508736A GB11790/38A GB1179038A GB508736A GB 508736 A GB508736 A GB 508736A GB 11790/38 A GB11790/38 A GB 11790/38A GB 1179038 A GB1179038 A GB 1179038A GB 508736 A GB508736 A GB 508736A
Authority
GB
United Kingdom
Prior art keywords
cement
sulphate
calcium sulphate
calcination
calcined
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
GB11790/38A
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.)
Ciments De Thieu SA Des
Original Assignee
Ciments De Thieu SA Des
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 Ciments De Thieu SA Des filed Critical Ciments De Thieu SA Des
Publication of GB508736A publication Critical patent/GB508736A/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
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

508,736. Cement; calcium sulphate. SOC. ANON. DES CIMENTS DE THIEU, and BLONDIAU, L. April 19, 1938, No. 11790. Convention date, April 17, 1937. Addition to 437,855. [Class 22] [Also in Group III] Cement containing calcium sulphate is obtained by mixing or grinding the constituents of the cement with gypsum which has been calcined in a slightly reducing atmosphere at 900-1200‹ C. Rock gypsum may be calcined in the presence of 0. 5-1 per cent of coal, or calcination be effected in a rotary kiln in a flame containing 0.5 per cent of pulverized coal, or a carbon monoxide flame may be used. A short period of calcination, say 5-15 minutes, is preferred as decomposition of the sulphate is thereby avoided. The invention is particularly applicable in the production of blast furnace slag cements rich in calcium sulphate but may also be used in the production of Portland cements containing only small quantities of sulphate.
GB11790/38A 1937-04-17 1938-04-19 Improvements in and relating to the manufacture of cement Expired GB508736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE508736X 1937-04-17

Publications (1)

Publication Number Publication Date
GB508736A true GB508736A (en) 1939-07-05

Family

ID=3870965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11790/38A Expired GB508736A (en) 1937-04-17 1938-04-19 Improvements in and relating to the manufacture of cement

Country Status (1)

Country Link
GB (1) GB508736A (en)

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