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.

Abstract: This invention relates to the extraction of metal values from metal bearing ores. More particularly, in a process for recovering metal values from metal bearing ore, the invention provides the step of enhancing metal value recovery by introducing into the thickener overflow water 32, a gaseous agent capable of promoting recovery of the metal values from the ore. The gaseous agent may be oxygen or oxygen enriched gas, and can be injected by means of injection means 50.

Abstract: This invention relates to the extraction of metal values from metal bearing ores. More specifically, according to the invention, in a process for extracting metal values from metal bearing ores, there is provided a method of enhancing metal value recovery from the ore. The method comprises introducing, upstream of a metal recovery section 26, a gaseous or liquid agent capable of promoting recovery of the metal values from the ore, into the gland service water from at least one of the pumps 30. The introduction of the gaseous or liquid agent is by means of an arrangement 35. The agent may be oxygen.