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Particulate of sulfur-containing ore materials and heap made therefrom

  • US 6,696,283 B1
  • Filed: 11/09/2001
  • Issued: 02/24/2004
  • Est. Priority Date: 07/10/1991
  • Status: Expired due to Fees
First Claim
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1. A particulate of an ore material having a metal value and a matrix material having a sulfur content wherein the sulfur is present in an oxidation-reduction state of zero or less comprisinga. a core particle of said ore material, said core particle having a size of less than about two inches;

  • and b. a layer of particles of said ore material and an inoculate of sulfur biooxidizing bacteria in admixture with said particles wherein said particulate has sufficient strength to retain at least about 95% of a void volume for a column height of about 6 feet for at least 200 days when continuously bathed in a solution comprised of said inoculate or a nutrient therefor.

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