Recovery of metals from jarosite-containing materials

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

Reexamination Certificate

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C075S739000, C075S743000, C075S744000, C205S263000

Reexamination Certificate

active

07037357

ABSTRACT:
A method to dissolve at least one metal from jarosite or other iron hydroxyl sulphate containing-material which includes the steps of subjecting the material to alkaline treatment in a brine solution to facilitate jarosite decomposition, and acidification of the brine slurry to solubilise the liberated metal.

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Ed. By T.S. Mackey and R.D. Prengaman: “Lead-Zinc '90 ”1990, The Minerals, Metals & Materials Society, Warrendale, PA USA XP 001118111 cited in the application Berezowsky RMGS et al: “Silver and gold recovery from zinc pressure leach residue”, p. 135-150.
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