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Radiation Protection Dosimetry 33:187-188 (1990)
© 1990 Oxford University Press

Measurements of CaF2 Concentration in Fluorite Using Thermoluminescence Techniques

L. Lembo, G. Maestri, M. Pimpinella, V. Benzi and C. Muntoni

Fluorite powder is produced by means of a flotation process on crude ore extracted by the mines. A full automation of the flotation plant would reduce the operating cost and improve the quality and recovery of fluorite production. However, taking into account that the efficiency of a flotation cycle is directly dependent by the CaF2 content in the concentrated and tail products, this automation requires a quasi-real-time quantitative analysis of CaF2 concentration in the floated pulp. The feasibility was studied of using a thermoluminescence technique as an on-line analysis method to measure the CaF2 concentration during the flotation cycle. A first set of experimental conditions to determine CaF2 content in acid-grade fluorspar has been already developed and the preliminary results so far obtained are presented.


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