Method for treating a mineral sulfide

Details Method for treating a mineral sulfide Method for treating a mineral sulfide

1975-09-23

1980-10-07

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

423 47, 423110, 423153, 423154, C22B 102

Patent

active

042266173

ABSTRACT:
This invention relates to method and apparatus for treating a sulfur containing material having at least one principal sulfide either in the form of a sulfide or in a form that is transformable into a sulfide and at least one auxiliary sulfide more volatile than the principal sulfide or transformable into another sulfide more volatile than the principal sulfide, wherein the sulfurous material is heated in one furnace zone, having a non-oxidizing atmosphere in the gas phase, to a temperature between that required for volatilization of the principal sulfide and that required for volatilization of the auxiliary sulfide to volatilize the auxiliary sulfide and labile sulfur, without volatilizing or substantially oxidizing the principal sulfide; and heating the sulfurous material in another furnace zone, having an oxidizing atmosphere in the gas phase, to a temperature lower than that required for substantial oxidization of the principal sulfide, to oxidize the volatilized labile sulfur and auxiliary sulfide, without substantially oxidixing the principal sulfide.

REFERENCES:
patent: 2209331 (1940-06-01), Haglund
patent: 2719082 (1955-09-01), Sproube et al.
Weast, R. C., Ed.; Handbook of Chemistry and Physics, The Chemical Rubber Co., Cleveland, Ohio, 52nd edition (1971) pp. B62, 89, 99, 114.

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