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OwnerChristopher A. Fleming, David Dreisinger +1inventors
InventorsChristopher A. Fleming, David Dreisinger, P. Terry O'Kane
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A method for recovering a precious metal from a host material, comprises the steps of subjecting the host material to an oxidative pressure leach process, in the presence of a halide ion constituent, preferably a chloride ion, which is reactive with the precious metal, and at an elevated temperature of at least 170° C. to cause at least a portion of the precious metal to be extracted by a leach solution in the form of a precious metal-bearing chloride complex, and recovering the precious metal from the leach solution. When the host material is a smelt malte material including a base metal and a precious metal, said malte is subjected to a first oxidative pressure leach process to recover substantially all of said base metal in the form of at least one sulphate complex into a first leach solution, and then said malte material is subjected to a second oxidative pressure leach process in the presence of a halide ion constituent and at a temperature sufficient to cause at least a portion of said precious metal to be recovered into a second leach solution, from which the precious metal is extracted.
A method for recovering a precious metal portion and a base metal portion from a host material, comprising the steps of:
A method for leaching a precious metal from a host material, comprising the steps of:
A method for leaching a precious metal and a base metal from a host material in a single step by subjecting the host material to an oxidative pressure leach process, in the presence of a chloride ion constituent and at a temperature of at least 170 degrees Celsius in order to form a leach solution containing at least one precious metal-bearing chloride complex and the base metal.
A method for economically leaching a precious metal from a host material, comprising the step of leaching said host material with salt water at a temperature of at least 170 degrees Celsius, in the presence of an oxidant and at sufficient pressure to form, in the leach solution, a chloride complex containing the precious metal.
A method for recovering a precious metal from a host material, comprising the steps of:
A method for recovering a precious metal from a host material, comprising the steps of:
A method for recovering a precious metal from a smelt matte material, wherein said matte material includes a precious metal constituent and a base metal constituent, comprising the steps of:
A method for recovering a precious metal from a smelt matte material, wherein said matte material includes a precious metal constituent and a base metal constituent, comprising the steps of:
Dependencies are inferred from the claim text.