USE OF PRECALCINERS TO REMOVE ALKALI FROM RAW MATERIAL IN THE CEMENT INDUSTRY. QUARTERLY TECHNICAL PROGRESS REPORT, AUGUST-OCTOBER 1978

A literature survey assisted in defining the role of CaCl2 and limiteations 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 CaCl2 was used. This may indicate that their structure collapsed upon removal of some alkali, and that CaCO3 should be added to the clay burns.

  • Corporate Authors:

    Portland Cement Association

    5420 Old Orchard Road
    Skokie, IL  United States  60077

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  United States  20585
  • Authors:
    • Miller, F M
  • Publication Date: 1978-11

Media Info

  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00313034
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Contract Numbers: EM-78-C-02-4929
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM