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Precious Metal Recovery (Patents Pending)
The Metal Recovery Team at GBI specializes in developing innovative biomining techniques to recover metals, particularly precious metals, from metal-containing support materials such as mineral ore. The support material is contacted with a solution containing a hydrocarbon which stimulates the growth of hydrocarbon-utilizing bacteria.
Conventional biological methods have focused on the recovery of precious metals using sulfur-oxidizing bacteria. Bacteria are used as biological agents to recover precious ore values. Following treatment with the bacteria, the ore is leached to cause the dissolution of the precious metal in the ore. A conventional process includes the steps of distributing a concentrate of refractory sulfide minerals on top of a heap of material, biooxidizing the concentrate of refractory sulfide minerals, leaching precious metal values from the biooxidized refractory sulfide minerals with a lixiviant, and recovering precious metal values from the lixiviant.
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