Method of recovering sulfur from minerals and other sulfur-containing compounds
AssigneeDowa Mining Co., Ltd.
InventorsYoshiyuki Watanabe, Toyohisa Fujita, Kaoru Saruta
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Abstract
A sulfurous compound such as a sulfur-rich “float” (concentrate) obtained by flotation of the residue from the leaching of a zinc concentrate is heated at a temperature not lower than the melting point of sulfur but below its boiling point, preferably not higher than 200° C., more preferably not higher than 140° C., and the evolving gas containing sulfur vapor is cooled at a temperature less than the melting point of sulfur, preferably at ordinary temperature, to condense sulfur.
Claims12
A method of recovering sulfur from a float comprising elemental sulfur-containing compounds inclusive of minerals, in which the sulfur comprises amorphous particles, said method comprising:
- (i) heating the elemental sulfur-containing compound containing sulphur as amorphous particles to a temperature not lower than the melting point of sulfur but less than 200° C. to produce sulfur vapor from the amorphous sulfur particles;
- (ii) mixing a carrier gas with the sulfur vapor;
- (iii) removing the mixture of carrier gas and sulfur vapor from the elemental sulfur containing compounds;
- and thereafter
- (iv) cooling the gas containing sulfur vapor to a temperature less than the melting point of sulfur, to recover condensed sulfur.
Dependencies are inferred from the claim text.