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1.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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2.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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公开(公告)号：US10689732B2
公开(公告)日：2020-06-23
申请号：US16465856
申请日：2017-11-30
Applicant: FLSmidth A/S
Inventor： David John Chaiko , Frank Baczek , Sara (Sally) Rocks
Abstract: A method of controlling iron in a hydrometallurgical process is disclosed. The method may comprise the steps of: leaching (14, 114) a feed slurry (2, 102); forming a pregnant leach solution (12a, 12b; 112a, 112b); removing a first leach residue (18, 118) from the pregnant leach solution (12a, 12b); and sending a portion (12b, 112b) of the pregnant leach solution (12a, 12b) and/or raffinate (22, 122) produced therefrom, to an iron removal process (34, 134). According to some preferred embodiments, the iron removal process (34, 134) may comprise the steps of: sequentially processing the pregnant leach solution (12a, 12b) and/or raffinate (22, 122) produced therefrom in a first reactor (R1) a second reactor (R2), and a third reactor (R3); maintaining a pH level of the first reactor (R1) above 4, by virtue of the addition of a first base; maintaining a pH level of the second (R2) and/or third (R3) reactors above 8.5, by virtue of a second base; and forming solids (46) comprising magnetite (68). The method may further comprise the steps of performing a solid liquid separation step (36) after the iron removal process (34, 134); and performing a magnetic separation step (64) to remove magnetite (68) from said solids comprising magnetite (68), without limitation. A system for performing the method is also disclosed.
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4.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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5.发明授权公开(公告)号：US11124856B1
公开(公告)日：2021-09-21
申请号：US15526826
申请日：2015-11-20
Applicant: FLSmidth A/S , David J. Chaiko
Inventor： David J. Chaiko , Frank Baczek , Sara (Sally) Rocks , Carlos Eyzaguirre
Abstract: Systems for improving metal leach kinetics and metal recovery during atmospheric or substantially atmospheric leaching of a metal sulfide are disclosed. In some embodiments, an oxidative leach circuit 200 may employ Mechano-Chemcial/Physico-Chemical processing means for improving leach kinetics and/or metal recovery. In preferred embodiments, the Mechano-Chemcial/Physico-Chemical means comprises various combinations of stirred-tank reactors 202 and shear-tank reactors 212. As will be described herein, the stirred-tank reactors 202 and shear-tank reactors 212 may be arranged in series and/or in parallel with each other, without limitation. In some non-limiting embodiments, a shear-tank reactor 212 may also be disposed, in-situ, within a stirred-tank reactor 202.
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Patent Agency Ranking
公开(公告)号：US20210062294A1
公开(公告)日：2021-03-04
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
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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公开(公告)号：US10781501B2
公开(公告)日：2020-09-22
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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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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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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公开(公告)号：US20190309391A1
公开(公告)日：2019-10-10
申请号：US16465856
申请日：2017-11-30
Applicant: FLSmidth A/S
Inventor： David John Chaiko , Frank Baczek , Sara (Sally) Rocks
Abstract: A method of controlling iron in a hydrometallurgical process is disclosed. The method may comprise the steps of: leaching (14, 114) a feed slurry (2, 102); forming a pregnant leach solution (12a, 12b; 112a, 112b); removing a first leach residue (18, 118) from the pregnant leach solution (12a, 12b); and sending a portion (12b, 112b) of the pregnant leach solution (12a, 12b) and/or raffinate (22, 122) produced therefrom, to an iron removal process (34, 134). According to some preferred embodiments, the iron removal process (34, 134) may comprise the steps of: sequentially processing the pregnant leach solution (12a, 12b) and/or raffinate (22, 122) produced therefrom in a first reactor (R1) a second reactor (R2), and a third reactor (R3); maintaining a pH level of the first reactor (R1) above 4, by virtue of the addition of a first base; maintaining a pH level of the second (R2) and/or third (R3) reactors above 8.5, by virtue of a second base; and forming solids (46) comprising magnetite (68). The method may further comprise the steps of performing a solid liquid separation step (36) after the iron removal process (34, 134); and performing a magnetic separation step (64) to remove magnetite (68) from said solids comprising magnetite (68), without limitation. A system for performing the method is also disclosed.
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