Process and apparatus for extraction of metal values from metal bearing ores
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United States of America Patent
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May 10, 1994
Grant Date -
N/A
app pub date -
Jun 8, 1992
filing date -
Jun 6, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to the extraction of metal values from metal bearing ores. More specifically, the invention comprises, in a process 10 for extracting metal values from metal bearing ores, a method of enhancing metal value recovery from the ore. The method comprises introducing, upstream of a metal recovery section 26, a gaseous agent by means of arrangements 30. The gaseous agent is capable of promoting recovery of metal values from the ore. The gaseous agent introduction is into at least one of the pipelines 20, 24, 28 conveying ore slurry or process water for use in slurry ore or for slurry make-up. The gaseous agent introduction is effected at a plurality of spaced points or zones, with the proviso that when at least one of the points or zones is in a slurry pipeline between a hydrocyclone separator and a thickener in the leaching stage, or in a water return pipeline from such a thickener to a mill, then at least one further gaseous agent introduction point or zone is provided in a pipeline downstream of such thickener.
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