Use of precalciners to remove alkali from raw material in the cement industry. Quarterly technical progress report, May-June 1979

Technical Report · Wed Aug 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/5833711· OSTI ID:5833711

Gartner, E. M.

Tests were made to determine the best method for volatilizing the alkalis in high-alkali clays, feldspars, and similar argillaceous materials. MgCl/sub 2/ was more effective in removing alkalis from feldspars than from the other minerals. Reducing conditions (graphite + CaCO/sub 3//CaCl/sub 2/) increased alkali volatility slightly exept in the case of illite. Water vapor had a negative effect. FeCl/sub 3/.6H/sub 2/O is not a very effective additive. Alkalis can be removed rapidly by heating to 1450/sup 0/C. (DLC)

• Research Organization: Portland Cement Association, Skokie, IL (USA). Construction Technology Labs.
• DOE Contract Number: EM-78-C-02-4929
• OSTI ID: 5833711
• Report Number(s): COO-4929-4
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CLAYS
PURIFICATION
FELDSPARS
POTASSIUM OXIDES
REMOVAL
SODIUM OXIDES
ADDITIVES
ALBITE
CALCIUM CARBONATES
CALCIUM CHLORIDES
COMBUSTION
EVAPORATION
GRAPHITE
HYDRATES
ILLITE
IRON CHLORIDES
KAOLIN
MAGNESIUM CHLORIDES
MICROCLINE
MONTMORILLONITE
MUSCOVITE
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON COMPOUNDS
MAGNESIUM COMPOUNDS
MICA
MINERALS
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties