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Gas injection apparatus and method having application to gold leaching

  • US 5,645,771 A
  • Filed: 09/21/1995
  • Issued: 07/08/1997
  • Est. Priority Date: 09/21/1995
  • Status: Expired due to Fees
First Claim
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1. A gas injection apparatus for injecting a gas into a liquid comprising:

  • a baffle plate having an outer peripheral region;

    a discharge nozzle to discharge at least said liquid;

    said discharge nozzle oriented normally to said baffle plate so that a fluid stream composed of at least said liquid is directed against said plate and produces an oppositely directed flow, towards said outer peripheral regions of said baffle plate;

    said oppositely directed flow having a sheet-like turbulent flow regime located adjacent to said plate and means forming a circulating flow regime located above said turbulent flow regime; and

    means for mixing said gas into said liquid so that smaller bubbles are entrained in said turbulent flow regime and are discharged with said liquid flowing in said turbulent flow regime from said outer peripheral region of said baffle plate and larger bubbles float into said circulating flow regime to break up into said smaller bubbles to be entrained in said turbulent flow regime.

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