LETTERS TO EDITORS
Production of Synthetic Fluorspar from Waste Calcium Fluoride Slurry
Z. Kowalski. , A. Paszek*
Cracow University of Technology, Institute of Chemistry and Inorganic Technology, Warszawska 24, Cracow,
*Institute of Inorganic Chemistry, Sowinski 11, Gliwice
*Institute of Inorganic Chemistry, Sowinski 11, Gliwice
Pol. J. Environ. Stud. 1999;8(2):125–128
KEYWORDS
ABSTRACT
Synthetic fluorspar can be produced from waste calcium fluoride slurry settled on dumpsites located near Cracow centre. Synthetic fluorspar exchanges natural raw material used in metallurgical industry. To obtain grained synthetic fluorspar, calcium fluoride slurry should be calcinated in rotary kiln in temperature 900-1100K. Grain size and compression strength strongly depends on calcination time and temperature. X-ray and thermal analysis indicate that calcium fluoride, apatite and sodium fluoride are basic phases of the synthetic fluorspar.
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