FIELD: fluoride extraction processes. SUBSTANCE: method comprises steps of pyrolysis of residues of coal foam, slurry and dust of gas scrubber with particles size 0.001-1 mm in such a way, that the particles are being moved along an endless cyclic path with separation degree, equal to (1-100)x(1 - 100)× 103. Fluoride extraction degree consists 97.3-98.5 %. EFFECT: enhanced fluoride extraction degree. 1 cl, 2 tbl
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Authors
Dates
1994-11-15—Published
1991-06-03—Filed