Particulate of sulfur-containing ore materials and heap made therefrom
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United States of America Patent
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Feb 24, 2004
Issued Date -
N/A
app pub date -
Nov 9, 2001
filing date -
Jul 10, 1991
priority date (Note) -
Expired
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Abstract
Disclosed is a particulate of an ore material having a metal value metal value and a matrix material having a sulfur content wherein the sulfur is present in an oxidation-reduction state of zero or less, the particulate comprising (a) a core particle of the ore material, with the core particle having a size of less than about two inches; and (b) a layer of particles of the ore material and an inoculate of sulfur biooxidizing bacteria in admixture with the particles; wherein the 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 the inoculate or a nutrient therefor. Also disclosed is a heap comprising a plurality of the particulate.
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