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公开(公告)号：US20170369968A1
公开(公告)日：2017-12-28
申请号：US15535000
申请日：2015-12-21
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Sara (Sally) Rocks
CPC classification number: C22B15/0071 , C01G1/12 , C01G3/10 , C01G49/14 , C22B3/04 , C22B3/08 , C22B4/04 , C22B15/00 , C22B15/001 , Y02P10/234 , Y02P10/236
Abstract: A method of improving leach kinetics and recovery during atmospheric or above-atmospheric leaching of a metal sulfide is disclosed. A system for practicing the aforementioned method is also disclosed. Apparatus for practicing the aforementioned method is also disclosed. A new composition of matter which is formed by the aforementioned method, and which may be utilized in the system and apparatus is further disclosed. The new composition of matter may exhibit improved leach kinetics, and may have some utility in the semi-conductor arts, including uses within photovoltaic materials.
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2.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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3.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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4.发明授权公开(公告)号：US11124858B2
公开(公告)日：2021-09-21
申请号：US17272437
申请日：2019-08-27
Applicant: FLSmidth A/S
Inventor： David J. Chaiko
Abstract: A method for removing sulfate iron-containing compounds from a low- to moderate-temperature metal sulfide leach circuit (1) is disclosed. A reactor (6) within a chloride leach circuit (5) and which is preferably maintained at a temperature between 20 and 150 degrees Celsius may be provided with a catalyst (4) comprising a material selected from the group consisting of: colloidal hematite, colloidal goethite, particulate containing FeOOH, particulate containing α-FeOOH, particulate containing γ-FeOOH, particulate containing Fe2O3, particulate containing α-Fe2O3, particulate containing γ-Fe2O3, particulate containing Fe3O4, particulate containing Fe(OH)SO4, and a combination thereof. The catalyst (4) may also be used with heap leach and/or dump leach circuits (22), without limitation. Methods for using and generating the catalyst (4) are also disclosed. In some embodiments, the catalyst (4) may be used as an anti-frothing agent (e.g., for zinc leaching, without limitation).
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5.发明申请公开(公告)号：US20170356063A1
公开(公告)日：2017-12-14
申请号：US15527489
申请日：2015-11-20
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Frank Baczek , Sara (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 step of processing a metal sulfide concentrate in a reductive activation circuit 220 that operates at a first redox potential, to produce a reductively-activated metal sulfide concentrate. The method may further comprise the step of subsequently processing the activated metal sulfide concentrate in an oxidative leach circuit 240 to extract metal values. In some disclosed embodiments, reductive activation steps and/or oxidative dissolution steps may employ mechano-chemical and/or physico-chemical processing of particles or agglomerates thereof. Reductive activation may be made prior to heap leaching or bio-leaching operations to improve metal extraction. Systems for practicing the aforementioned methods are also disclosed.
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Patent Agency Ranking
公开(公告)号：US11898221B2
公开(公告)日：2024-02-13
申请号：US16992644
申请日：2020-08-13
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Frank Baczek , Sara (Sally) Rocks , Carlos Eyzaguirre
CPC classification number: C22B3/04 , C22B3/02 , C22B15/0065 , C22B15/0095 , Y02P10/20
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 step of processing a metal sulfide concentrate in a reductive activation circuit 220 that operates at a first redox potential, to produce a reductively-activated metal sulfide concentrate. The method may further comprise the step of subsequently processing the activated metal sulfide concentrate in an oxidative leach circuit 240 to extract metal values. In some disclosed embodiments, reductive activation steps and/or oxidative dissolution steps may employ mechano-chemical and/or physico-chemical processing of particles or agglomerates thereof. Reductive activation may be made prior to heap leaching or bio-leaching operations to improve metal extraction. Systems for practicing the aforementioned methods are also disclosed.
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7.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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公开(公告)号：US20170226611A1
公开(公告)日：2017-08-10
申请号：US15502142
申请日：2015-08-11
Applicant: FLSmidth A/S
Inventor： David J. Chaiko , Gary Roy
IPC: C22B15/00
CPC classification number: C22B15/0028 , C22B15/0008 , C22B15/0063 , Y02P10/236
Abstract: A method of operating a copper or other metal value concentrator is disclosed. According to some embodiments, the method may comprise producing a final copper concentrate; periodically or continuously analyzing the produced final copper concentrate to obtain a grade value of the produced final copper concentrate; and diverting the produced final copper concentrate to a downstream smelting operation if/when the grade value of the produced final copper concentrate is at or above a minimum acceptable grade threshold; or, diverting the produced final copper concentrate to a downstream hydrometallurgical operation capable of producing copper cathode or other saleable copper product from the produced final copper concentrate, if/when the grade value of the produced final copper concentrate is below said minimum acceptable grade threshold. A copper concentrator capable of conducting the aforementioned method steps is also disclosed.
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9.发明申请公开(公告)号：US20170080355A1
公开(公告)日：2017-03-23
申请号：US15120239
申请日：2015-02-16
Applicant: Frank BACZEK , FLSmidth A/S
Inventor： Frank Baczek , David J. Chaiko , Vishal Gupta , Suma Kandagatla , Bryan Potratz , Gary Roy
CPC classification number: B01D11/0457 , B01D11/048 , B01D17/0211 , B01D17/041
Abstract: A mixer settler system is disclosed. The system comprises a mixer [110] configured for receiving an organic phase and an aqueous phase, the mixer [110] being further configured to maintain the organic phase and the aqueous phase in a single unstable emulsion phase, wherein mass transfer occurs between said organic phase and said aqueous phase; and, a column settler [120] which is configured to receive a single unstable emulsion phase from the mixer [110] via an emulsion inlet [125] and is also configured to separate the single unstable emulsion phase into a stable organic phase and a stable aqueous phase by virtue of coalescence; the column settler further comprising an organic outlet [121] above the emulsion inlet [125] and an aqueous outlet [123] below the emulsion inlet [125]; the column settler [120] further discouraging mass transfers within the unstable emulsion phase and further promoting coalescence of each of said stable organic phase and stable aqueous phase. A method of settling two immiscible liquids is further disclosed. The method comprises providing a mixer [110] configured for receiving an organic phase and an aqueous phase; maintaining the organic phase and the aqueous phase in a single unstable emulsion phase using the mixer [110], wherein mass transfer occurs between said organic phase and said aqueous phase; providing a column settler [120] which is configured to receive a single unstable emulsion phase from the mixer [110]; sending the single unstable emulsion phase to the column settler [120]; and separating the single unstable emulsion phase into a stable organic phase and a stable aqueous phase within the column settler [120] by virtue of coalescence.
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公开(公告)号：US10526681B2
公开(公告)日：2020-01-07
申请号：US15528698
申请日：2015-12-16
Applicant: David J. Chaiko , FLSmidth A/S
Inventor： David J. Chaiko , Carlos Eyzaguirre
Abstract: A system and method for improving leach kinetics and recovery during above-atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the steps of: (a) producing a metal sulfide concentrate [34] via flotation; (b) moving the produced metal sulfide concentrate [34] to at least one chamber [22a] of at least one reactor such as an autoclave [20]; (c) leaching the produced metal sulfide concentrate in said at least one chamber [22a] in the presence of oxygen [82] at a pressure and/or temperature above ambient, and in the presence of partially-used [25] and/or or new [92] grinding media within the at least one chamber [22a]. Systems [10] and apparatus [20, 200] for practicing the aforementioned method are also disclosed.
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