Method for producing electrolytic zinc through high-chloride zinc ash material ammonia leaching ion exchange combined process

Method for producing electrolytic zinc through high-chloride zinc ash material ammonia leaching ion exchange combined process

  • CN 106,399,715 A
  • Filed: 09/27/2016
  • Published: 02/15/2017
  • Est. Priority Date: 09/27/2016
  • Status: Active Application
First Claim
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1. a kind of high chlorine zinc gray material ammonia soak ion exchange process integration produce electrolytic zinc method it is characterised in that comprise withLower step:

  • (1) zinc gray of high chlorinity is carried out slurrying, in serosity add slurrying ammonia carry out ammonia leaching so as in chloride dissolutionOr conversion is extracted into ammonia leaching solution, obtain ammonia leaching slag and ammonia leaching liquid after filtering, as chlorine ion concentration is less than in ammonia leaching liquidDuring 80g/L, return the leaching of slurrying ammonia, such as chlorine ion concentration is then opened a way more than 80g/L and is evaporated reclaiming villaumite one;

    (2) ammonia leaching slag is rinsed and is filtered washings and rinsing after zinc gray, to rinsing after zinc gray carry out wet method sulphuric acidLeach, obtain solution of zinc sulfate and leached mud, leached mud uses as reclaiming zinc lead;

    (3)) to the solution of zinc sulfate spent ion exchange resin removing chloride ion in step (2) step, after dechlorination, solution of zinc sulfate sendElectrodeposition reclaims zinc, and after electrodeposition, liquid returns for wet method sulfuric acid leaching;

    Ion exchange resin strippant desorbing chlorine, after desorbing, liquid entersEnter integral type dechlorination apparatus dechlorination and produce villaumite two, the ion exchange resin after desorbing recycles;

    (4)) chloride shift in liquid after desorbing enters absorbing liquid, allows liquid after dechlorination desorbing to be recycled, returns ion exchangeStrippant made by resin;

    After absorption, liquid reclaims villaumite two after reaching finite concentration.

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