Use of precalciners to remove alkali from raw material in the cement industry. Quarterly technical progress report, August-October 1978

Technical Report · Wed Nov 01 00:00:00 EST 1978

DOI:https://doi.org/10.2172/6063823· OSTI ID:6063823

Miller, F. M.

A literature survey assisted in defining the role of CaCl/sub 2/ and limitations on its applicability to alkali reduction experimentation. Additional insight into the mechanism and parameters of heat exchange in the precalciner-type kiln systems has been gained from the literature search, which culminated in the preparation of the bibliography covering thermal treatment of raw materials. Experiments investigating the efficiency of alkali volatization from pure argillaceous minerals are underway. Initial results have been encouraging, as significant fractions of total alkali were volatilized even under the static conditions employed. Clay minerals were, rather surprisingly, more resistant to alkali removal than feldspars when CaCl/sub 2/ was used. This may indicate that their structure collapsed upon removal of some alkali, and that CaCO/sub 3/ should be added to the clay burns.

• Research Organization: Portland Cement Association, Skokie, IL (USA)
• DOE Contract Number: EM-78-C-02-4929
• OSTI ID: 6063823
• Report Number(s): COO-4929-1
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALKALI METALS
REMOVAL
CEMENTS
PRODUCTION
HYDROXIDES
CALCIUM CHLORIDES
ENERGY CONSERVATION
EVAPORATION
KILNS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
MATERIALS
METALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
320301* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Energy Sources
400201 - Chemical & Physicochemical Properties