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公开(公告)号：US10000389B2
公开(公告)日：2018-06-19
申请号：US15504882
申请日：2015-08-27
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Frank Baczek , Tom Walters , Sarah (Sally) Rocks , Gary Roy , Carlos Eyzaguirre
CPC classification number: C01G3/12 , B03D1/028 , C01B17/20 , C22B1/00 , C22B3/04 , C22B15/0071 , Y02P10/234
Abstract: A method of controlling frothing during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the steps of (a) producing a metal sulfide concentrate via flotation; (b) producing a tailings stream via flotation; and, (c) diverting a portion or all of said produced tailings stream to an atmospheric or substantially atmospheric sulfide leach circuit. A metal recovery flowsheet is also disclosed. In some embodiments, the metal recovery flowsheet may comprise a unit operation comprising: (a) a sulfide concentrator comprising a flotation circuit, the flotation circuit producing a metal sulfide concentrate stream, and a tailings stream; and, (b) an atmospheric or substantially atmospheric metal sulfide leach circuit. The sulfide concentrator may be operatively connected to the atmospheric or substantially atmospheric metal sulfide leach circuit via both of said metal sulfide concentrate stream, and said tailings stream.
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2.发明授权公开(公告)号：US10023935B2
公开(公告)日：2018-07-17
申请号：US15509147
申请日：2015-09-14
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Frank Baczek , Tom Walters , Sarah (Sally) Rocks , Carlos Eyzaguirre
Abstract: A method of improving metal leach kinetics and recovery during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the steps of: (a) producing a metal sulfide flotation concentrate; (b) processing the metal sulfide concentrate in a reductive activation circuit that operates at a first redox potential, to produce a reductively-activated metal sulfide concentrate; and, (c) subsequently processing the activated metal sulfide concentrate in an oxidative leach circuit to extract metal values. In some disclosed embodiments, reductive activation steps may be employed prior to oxidative leaching steps (including heap leap leaching or bio-leaching steps). In some embodiments, physico-chemical processing steps may be employed during reductive activation and/or oxidative leaching. Systems for practicing the aforementioned methods are also disclosed.
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3.发明申请公开(公告)号：US20170283908A1
公开(公告)日：2017-10-05
申请号：US15509147
申请日：2015-09-14
Applicant: David J. CHAIKO , FLSmidth A/S
Inventor： David J. Chaiko , Frank Baczek , Tom Walters , Sarah (Sally) Rocks , Carlos Eyzaguirre
CPC classification number: C22B15/001 , C22B1/00 , C22B3/02 , C22B3/04 , C22B15/0065 , Y02P10/234
Abstract: A method of improving metal leach kinetics and recovery during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the steps of: (a) producing a metal sulfide flotation concentrate; (b) processing the metal sulfide concentrate in a reductive activation circuit that operates at a first redox potential, to produce a reductively-activated metal sulfide concentrate; and, (c) subsequently processing the activated metal sulfide concentrate in an oxidative leach circuit to extract metal values. In some disclosed embodiments, reductive activation steps may be employed prior to oxidative leaching steps (including heap leap leaching or bio-leaching steps). In some embodiments, physico-chemical processing steps may be employed during reductive activation and/or oxidative leaching. Systems for practicing the aforementioned methods are also disclosed.
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4.发明申请公开(公告)号：US20170275177A1
公开(公告)日：2017-09-28
申请号：US15504882
申请日：2015-08-27
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Frank Baczek , Tom Walters , Sarah (Sally) Rocks , Gary Roy , Carlos Eyzaguirre
CPC classification number: C01G3/12 , B03D1/028 , C01B17/20 , C22B1/00 , C22B3/04 , C22B15/0071 , Y02P10/234
Abstract: A method of controlling frothing during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the steps of (a) producing a metal sulfide concentrate via flotation; (b) producing a tailings stream via flotation; and, (c) diverting a portion or all of said produced tailings stream to an atmospheric or substantially atmospheric sulfide leach circuit. A metal recovery flowsheet is also disclosed. In some embodiments, the metal recovery flowsheet may comprise a unit operation comprising: (a) a sulfide concentrator comprising a flotation circuit, the flotation circuit producing a metal sulfide concentrate stream, and a tailings stream; and, (b) an atmospheric or substantially atmospheric metal sulfide leach circuit. The sulfide concentrator may be operatively connected to the atmospheric or substantially atmospheric metal sulfide leach circuit via both of said metal sulfide concentrate stream, and said tailings stream.
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