GB496669A - Improvements in the treatment of raw mineral materials - Google Patents

Improvements in the treatment of raw mineral materials

Info

Publication number
GB496669A
GB496669A GB1559537A GB1559537A GB496669A GB 496669 A GB496669 A GB 496669A GB 1559537 A GB1559537 A GB 1559537A GB 1559537 A GB1559537 A GB 1559537A GB 496669 A GB496669 A GB 496669A
Authority
GB
United Kingdom
Prior art keywords
caco3
mill
fraction
rubber
coarse fraction
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
GB1559537A
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.)
FLSmidth and Co AS
Original Assignee
FLSmidth and Co AS
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 FLSmidth and Co AS filed Critical FLSmidth and Co AS
Priority to GB1559537A priority Critical patent/GB496669A/en
Publication of GB496669A publication Critical patent/GB496669A/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
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crushing And Grinding (AREA)

Abstract

In the preparation of starting materials for the manufacture of cement a method of obtaining a fraction containing a high proportion of CaCO3 comprises subjecting the starting materials to the action of a mill equipped with grinding elements consisting of metal cores with soft resilient coverings, separating the ground material into fractions, and eliminating the fraction that is lower in CaCO3. The mill may be a roller mill with rubber-covered rollers, a tube mill with rubber covered grinding bodies, or a hammer mill with rubber-coated hammers, and the covering may consist of pure vulcanized rubber at least 3 mm. thick. When the starting material consists of impure limestone, clay and sand the coarse fraction contains the higher proportion of CaCO3 and if a still higher proportion is desired the coarse fraction is subjected to flotation. In cases where the CaCO3 is present in a soft component and will be concentrated in the fine fraction, then the coarse fraction is eliminated.ALSO:In the preparation of starting materials for the manufacture of cement, a method of obtaining a fraction containing a high proportion of CaCO3 comprises subjecting the starting materials to the action of a mill equipped with grinding elements consisting of metal cores with soft resilient coverings, separating the ground material into fractions, and eliminating the fraction that is lower in CaCO3. The mill may be a roller mill with rubber-covered rollers, a tube mill with rubber-covered grinding bodies, or a hammer mill with rubber-coated hammers, and the covering may consist of pure vulcanized rubber at least 3 mm. thick. When the starting material consists of impure limestone, clay and sand the coarse fraction contains the higher proportion of CaCO3 and if a still higher proportion is desired the coarse fraction is subjected to flotation. In cases where the CaCO3 is present in a soft component and will be concentrated in the fine fraction, then the coarse fraction is eliminated.
GB1559537A 1937-06-04 1937-06-04 Improvements in the treatment of raw mineral materials Expired GB496669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1559537A GB496669A (en) 1937-06-04 1937-06-04 Improvements in the treatment of raw mineral materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1559537A GB496669A (en) 1937-06-04 1937-06-04 Improvements in the treatment of raw mineral materials

Publications (1)

Publication Number Publication Date
GB496669A true GB496669A (en) 1938-12-05

Family

ID=10061939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1559537A Expired GB496669A (en) 1937-06-04 1937-06-04 Improvements in the treatment of raw mineral materials

Country Status (1)

Country Link
GB (1) GB496669A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182584A (en) * 1985-11-06 1987-05-20 Beers Marine De Selective roll crushing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182584A (en) * 1985-11-06 1987-05-20 Beers Marine De Selective roll crushing apparatus

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