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Zinc recovery process

  • US 7,465,334 B2
  • Filed: 09/12/2002
  • Issued: 12/16/2008
  • Est. Priority Date: 09/13/2001
  • Status: Expired due to Fees
First Claim
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1. A process for the recovery of zinc metal from a zinc mineral which may have iron therein, comprising the steps of:

  • (i) leaching the zinc mineral wherein the zinc leaching step consists of a single stage using a solution including a halide species formed from two or more different halides, to leach the zinc into the solution(ii) passing the solution from (i) to an aeration stage in which air is introduced to oxidize and precipitate iron present in the mineral;

    (iii) electrolysing the zinc-bearing solution from (ii) to yield zinc metal and to generate the halide species; and

    (iv) returning the electrolysed solution including the halide species to the leaching step.

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