METHOD FOR PRE-TREATMENT OF GOLD-BEARING OXIDE ORES

摘要

The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.

主权项

1. A process, comprising:
contacting a thiosulfate refractory precious metal-containing material with carbon and an oxidant to form a pre-treated slurry; and contacting the pre-treated slurry with thiosulfate to leach a precious metal from the pre-treated precious metal-containing material.