Removing sulfur, phosphorus or arsenic other than by roasting

Industry

CPC
C22B1/11

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Parent Industries

CCHEMISTRY METALLURGY C22Metallurgy C22BPRODUCTION AND REFINING OF METALS PRETREATMENT OF RAW MATERIALS C22B1/00Preliminary treatment of ores or scrap

Current Industry

C22B1/11Removing sulfur, phosphorus or arsenic other than by roasting

Industries

Patents Grantslast 30 patents

Information Patent Grant
Alkaline oxidation methods and systems for recovery of metals from...
- Patent number 11,993,826
- Issue date May 28, 2024
- Hycroft Mining Holding Corporation
- Randy Buffington
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Systems and methods for aqueous recovery of lead from lead acid bat...
- Patent number 11,708,640
- Issue date Jul 25, 2023
- Aqua Metals Inc.
- Samaresh Mohanta
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method and system for desulfurization and dezincification of tailings
- Patent number 11,332,806
- Issue date May 17, 2022
- Kun-Liang Hong
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Biotechnological procedure to remove magnetic sulfur impurities fro...
- Patent number 11,319,612
- Issue date May 3, 2022
- BIOSIGMA S.A.
- Roberto Andres Bobadilla Fazzini
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Peptide binding to arsenic-containing mineral and use thereof
- Patent number 11,254,707
- Issue date Feb 22, 2022
- Shibaura Institute of Technology
- Mitsuo Yamashita
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
Information Patent Grant
Process for the depression of iron sulphides and other disposable e...
- Patent number 11,180,825
- Issue date Nov 23, 2021
- LAIN TECHNOLOGIES LTD
- Eva Maria Laín Rodríguez
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Method for reducing arsenic content in arsenic-bearing gold material
- Patent number 11,155,894
- Issue date Oct 26, 2021
- Eldorado Gold Corporation
- Roman Berezowsky
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method of leaching arsenic from ore comprising copper
- Patent number 11,149,328
- Issue date Oct 19, 2021
- Colorado School of Mines
- Kimberly D. Conner
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Low acidity, low solids pressure oxidative leaching of sulphidic feeds
- Patent number 11,118,244
- Issue date Sep 14, 2021
- Sherritt International Corporation
- Jan Tjeerd Smit
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Arsenic removal from lead concentrate by ozone treatment and revers...
- Patent number 10,822,673
- Issue date Nov 3, 2020
- American Air Liquide, Inc.
- Sylvester Zuttah
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Cationic flotation of silica and apatite from oxidized iron ores at...
- Patent number 10,786,819
- Issue date Sep 29, 2020
- Regents of The University of Minnesota
- Matthew Albert Mlinar
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process and reactor for arsenic fixation
- Patent number 10,196,707
- Issue date Feb 5, 2019
- Hatch, LTD
- Kamal Adham
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Leaching of minerals
- Patent number 10,190,193
- Issue date Jan 29, 2019
- GLENCORE TECHNOLOGY PTY LTD
- Michael Matthew Hourn
- C21 - METALLURGY OF IRON
Information Patent Grant
Enhanced metal recovery through oxidation in liquid and/or supercri...
- Patent number 10,167,202
- Issue date Jan 1, 2019
- King Abdullah University of Science and Technology
- Mario Blanco
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for vitrification of arsenic and antimony
- Patent number 9,981,295
- Issue date May 29, 2018
- Dundee Sustainable Technologies Inc.
- Jean-Marc Lalancette
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Method for producing ferroalloy containing nickel
- Patent number 9,598,748
- Issue date Mar 21, 2017
- OUTOKUMPU OYJ
- Tuomo Mäkelä
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for producing direct reduced iron (DRI) utilizing gases der...
- Patent number 9,546,409
- Issue date Jan 17, 2017
- HYL TECHNOLOGIES, S.A. DE C.V.
- Eugenio Zendejas-Martinez
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for recovery of copper from arsenic-bearing and/or antimony...
- Patent number 9,410,225
- Issue date Aug 9, 2016
- Teck Resources Limited
- Henry Salomon-de-Friedberg
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Removal of arsenic using a dissimilatory arsenic reductase
- Patent number 9,328,397
- Issue date May 3, 2016
- Uniwersytet Warszawski
- Lukasz Drewniak
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for producing ferroalloy containing nickel
- Patent number 8,696,789
- Issue date Apr 15, 2014
- Outokumpu Oyj
- Tuomo Mäkelä
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process and equipment for the production of direct reduced iron and...
- Patent number 8,673,208
- Issue date Mar 18, 2014
- C.V.G. Ferrominera Orinoco C.A.
- Henry Rafael Bueno Colina
- C21 - METALLURGY OF IRON
Information Patent Grant
Process and equipment for the production of direct reduced iron and...
- Patent number 8,287,619
- Issue date Oct 16, 2012
- C.V.G. Ferrominera Orinoco C.A.
- Henry Rafael Bueno Colina
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for reduced alkali consumption in the recovery of silver
- Patent number 8,252,254
- Issue date Aug 28, 2012
- Barrick Gold Corporation
- Yeonuk Choi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Recovery of rare earth elements
- Patent number 7,993,612
- Issue date Aug 9, 2011
- Arafura Resources Limited
- Steven John Mackowski
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process to benefit colemanite and/or howlite minerals
- Patent number 4,756,745
- Issue date Jul 12, 1988
- Materias Primas Magdalena, S.A.DE C. V.
- Jose Polendo-Loredo
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for oxidation of pyrite in coal to magnetite and low field m...
- Patent number 4,661,118
- Issue date Apr 28, 1987
- The United States of America, as represented by the Secretary of the Interior
- Arthur N. Thorpe
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for the preparation of pellets
- Patent number 4,549,904
- Issue date Oct 29, 1985
- Toyo Engineering Corporation
- Saburo Matsumiya
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for working-up arsenic-containing waste
- Patent number 4,489,046
- Issue date Dec 18, 1984
- Boliden Aktiebolag
- Stig A. Petersson
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method for removing sulphur in conjunction with the gasification of...
- Patent number 4,436,529
- Issue date Mar 13, 1984
- Boliden Aktiebolag
- Per A. H. H. Fahlstrom
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Direct reduction of ores and concentration of metallic values
- Patent number 4,416,688
- Issue date Nov 22, 1983
- Raymond Kaiser Engineers, Inc.
- Richard B. Greenwalt
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
MINERAL PROCESSING METHOD
- Publication number 20240327947
- Publication date Oct 3, 2024
- KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
- Tsuyoshi HIRAJIMA
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METHOD FOR PRODUCING LOW-ARSENIC COPPER CONCENTRATE
- Publication number 20240124952
- Publication date Apr 18, 2024
- NITTETSU MINING CO., LTD.
- Yousuke EBISU
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Systems And Methods For Aqueous Recovery Of Lead From Lead Acid Bat...
- Publication number 20230313400
- Publication date Oct 5, 2023
- Aqua Metals Inc.
- Samaresh Mohanta
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METHOD FOR REMOVING PHOSPHORUS FROM PHOSPHORUS-CONTAINING SUBSTANCE...
- Publication number 20220372591
- Publication date Nov 24, 2022
- JFE STEEL CORPORATION
- Rei YAMADA
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Systems And Methods For Aqueous Recovery Of Lead From Lead Acid Bat...
- Publication number 20220341051
- Publication date Oct 27, 2022
- Aqua Metals Inc.
- Samaresh Mohanta
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
PROCESSING ORES CONTAINING PRECIOUS METALS
- Publication number 20220127695
- Publication date Apr 28, 2022
- Newcrest Mining Limited
- John O'Callaghan
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
SELECTIVE SULFIDATION AND DESULFIDATION
- Publication number 20210277531
- Publication date Sep 9, 2021
- Massachusetts Institute of Technology
- Antoine Allanore
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
RECOVERY OF METALS FROM PYRITE
- Publication number 20210156003
- Publication date May 27, 2021
- COBALT BLUE HOLDINGS LTD
- Andrew Robert TONG
- C01 - INORGANIC CHEMISTRY
Information Patent Application
METHOD AND SYSTEM FOR DESULFURIZATION AND DEZINCIFICATION OF TAILINGS
- Publication number 20200024684
- Publication date Jan 23, 2020
- KUN-LIANG HONG
- C01 - INORGANIC CHEMISTRY
Information Patent Application
Alkaline Oxidation Methods and Systems for Recovery of Metals from...
- Publication number 20190376158
- Publication date Dec 12, 2019
- Hycroft Mining Corporation
- Randy Buffington
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PEPTIDE BINDING TO ARSENIC-CONTAINING MINERAL AND USE THEREOF
- Publication number 20190345201
- Publication date Nov 14, 2019
- SHIBAURA INSTITUTE OF TECHNOLOGY
- Mitsuo YAMASHITA
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PROCESS FOR THE DEPRESSION OF IRON SULPHIDES AND OTHER DISPOSABLE E...
- Publication number 20190169709
- Publication date Jun 6, 2019
- INFOROCK S.L.
- Eva Maria LAÍN RODRÍGUEZ
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
CATIONIC FLOTATION OF SILICA AND APATITE FROM OXIDIZED IRON ORES AT...
- Publication number 20190070616
- Publication date Mar 7, 2019
- Matthew Albert Mlinar
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Low Acidity, Low Solids Pressure Oxidative Leaching of Sulphidic Feeds
- Publication number 20180298466
- Publication date Oct 18, 2018
- SHERRITT INTERNATIONAL CORPORATION
- Jan Tjeerd SMIT
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METHOD FOR REDUCING ARSENIC CONTENT IN ARSENIC-BEARING GOLD MATERIAL
- Publication number 20180258510
- Publication date Sep 13, 2018
- Eldorado Gold Corporation
- Roman BEREZOWSKY
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
BIOTECHNOLOGICAL PROCEDURE TO REMOVE MAGNETIC SULFUR IMPURITIES FRO...
- Publication number 20180251872
- Publication date Sep 6, 2018
- Biosigma S.A.
- Roberto Andres BOBADILLA FAZZINI
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PROCESS AND REACTOR FOR ARSENIC FIXATION
- Publication number 20180105895
- Publication date Apr 19, 2018
- HATCH LTD.
- KAMAL ADHAM
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METHOD FOR VITRIFICATION OF ARSENIC AND ANTIMONY
- Publication number 20180023165
- Publication date Jan 25, 2018
- Dundee Sustainable Technologies Inc.
- Jean-Marc Lalancette
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
ENHANCED METAL RECOVERY THROUGH OXIDATION IN LIQUID AND/OR SUPERCRI...
- Publication number 20170240434
- Publication date Aug 24, 2017
- King Abdullah University of Science and Technology
- Mario BLANCO
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
BIOTECHNOLOGICAL PROCEDURE TO REMOVE MAGNETIC SULFUR IMPURITIES FRO...
- Publication number 20170058377
- Publication date Mar 2, 2017
- BIOSIGMA S.A.
- Roberto Andrés Bobadilla Fazzini
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
REMOVAL OF ARSENIC USING A DISSIMILATORY ARSENIC REDUCTASE
- Publication number 20150267276
- Publication date Sep 24, 2015
- UNIWERSYTET WARSZAWSKI
- Lukasz Drewniak
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
INTEGRATED PROCESS FOR PRODUCTION OF OZONE AND OXYGEN
- Publication number 20150068365
- Publication date Mar 12, 2015
- Timothy Christopher GOLDEN
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PROCESS FOR PRODUCING DIRECT REDUCED IRON (DRI) UTILIZING GASES DER...
- Publication number 20140260803
- Publication date Sep 18, 2014
- Danieli & C. Officine Meccaniche, S.P.A
- Eugenio Zendejas-Martinez
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD FOR PRODUCING FERROALLOY CONTAINING NICKEL
- Publication number 20140109724
- Publication date Apr 24, 2014
- Outokumpu Oyj
- Tuomo Mäkelä
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PROCESS AND EQUIPMENT FOR THE PRODUCTION OF DIRECT REDUCED IRON AND...
- Publication number 20120326364
- Publication date Dec 27, 2012
- C.V.G. FERROMINERA ORINOCO C.A.
- Henry Rafael Bueno Colina
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD FOR PRODUCING FERROALLOY CONTAINING NICKEL
- Publication number 20110308352
- Publication date Dec 22, 2011
- Outokumpu Oyj
- Tuomo Mäkelä
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PROCESS AND EQUIPMENT FOR THE PRODUCTION OF DIRECT REDUCED IRON AND...
- Publication number 20110296949
- Publication date Dec 8, 2011
- C.V.G. FERROMINERA ORINOCO C.A.
- Henry Rafael Bueno Colina
- C21 - METALLURGY OF IRON
Information Patent Application
Recovery of Rare Earth Elements
- Publication number 20090272230
- Publication date Nov 5, 2009
- Arafura Resources Limited
- Steven John Mackowski
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY GOLD ORES
- Publication number 20090158893
- Publication date Jun 25, 2009
- BARRICK GOLD CORPORATION
- Wan-Tai Yen
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PROCESS FOR REDUCED ALKALI CONSUMPTION IN THE RECOVERY OF SILVER
- Publication number 20070292326
- Publication date Dec 20, 2007
- BARRICK GOLD CORPORATION
- Yeonuk Choi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Removing sulfur, phosphorus or arsenic other than by roasting

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Alkaline oxidation methods and systems for recovery of metals from...

Systems and methods for aqueous recovery of lead from lead acid bat...

Method and system for desulfurization and dezincification of tailings

Biotechnological procedure to remove magnetic sulfur impurities fro...

Peptide binding to arsenic-containing mineral and use thereof

Process for the depression of iron sulphides and other disposable e...

Method for reducing arsenic content in arsenic-bearing gold material

Method of leaching arsenic from ore comprising copper

Low acidity, low solids pressure oxidative leaching of sulphidic feeds

Arsenic removal from lead concentrate by ozone treatment and revers...

Cationic flotation of silica and apatite from oxidized iron ores at...

Process and reactor for arsenic fixation

Leaching of minerals

Enhanced metal recovery through oxidation in liquid and/or supercri...

Method for vitrification of arsenic and antimony

Method for producing ferroalloy containing nickel

Process for producing direct reduced iron (DRI) utilizing gases der...

Process for recovery of copper from arsenic-bearing and/or antimony...

Removal of arsenic using a dissimilatory arsenic reductase

Method for producing ferroalloy containing nickel

Process and equipment for the production of direct reduced iron and...

Process and equipment for the production of direct reduced iron and...

Process for reduced alkali consumption in the recovery of silver

Recovery of rare earth elements

Process to benefit colemanite and/or howlite minerals

Method for oxidation of pyrite in coal to magnetite and low field m...

Process for the preparation of pellets

Method for working-up arsenic-containing waste

Method for removing sulphur in conjunction with the gasification of...

Direct reduction of ores and concentration of metallic values

Patents Applicationslast 30 patents

MINERAL PROCESSING METHOD

METHOD FOR PRODUCING LOW-ARSENIC COPPER CONCENTRATE

Systems And Methods For Aqueous Recovery Of Lead From Lead Acid Bat...

METHOD FOR REMOVING PHOSPHORUS FROM PHOSPHORUS-CONTAINING SUBSTANCE...

Systems And Methods For Aqueous Recovery Of Lead From Lead Acid Bat...

PROCESSING ORES CONTAINING PRECIOUS METALS

SELECTIVE SULFIDATION AND DESULFIDATION

RECOVERY OF METALS FROM PYRITE

METHOD AND SYSTEM FOR DESULFURIZATION AND DEZINCIFICATION OF TAILINGS

Alkaline Oxidation Methods and Systems for Recovery of Metals from...

PEPTIDE BINDING TO ARSENIC-CONTAINING MINERAL AND USE THEREOF

PROCESS FOR THE DEPRESSION OF IRON SULPHIDES AND OTHER DISPOSABLE E...

CATIONIC FLOTATION OF SILICA AND APATITE FROM OXIDIZED IRON ORES AT...

Low Acidity, Low Solids Pressure Oxidative Leaching of Sulphidic Feeds

METHOD FOR REDUCING ARSENIC CONTENT IN ARSENIC-BEARING GOLD MATERIAL

BIOTECHNOLOGICAL PROCEDURE TO REMOVE MAGNETIC SULFUR IMPURITIES FRO...

PROCESS AND REACTOR FOR ARSENIC FIXATION

METHOD FOR VITRIFICATION OF ARSENIC AND ANTIMONY

ENHANCED METAL RECOVERY THROUGH OXIDATION IN LIQUID AND/OR SUPERCRI...

BIOTECHNOLOGICAL PROCEDURE TO REMOVE MAGNETIC SULFUR IMPURITIES FRO...

REMOVAL OF ARSENIC USING A DISSIMILATORY ARSENIC REDUCTASE

INTEGRATED PROCESS FOR PRODUCTION OF OZONE AND OXYGEN

PROCESS FOR PRODUCING DIRECT REDUCED IRON (DRI) UTILIZING GASES DER...

METHOD FOR PRODUCING FERROALLOY CONTAINING NICKEL

PROCESS AND EQUIPMENT FOR THE PRODUCTION OF DIRECT REDUCED IRON AND...

METHOD FOR PRODUCING FERROALLOY CONTAINING NICKEL

PROCESS AND EQUIPMENT FOR THE PRODUCTION OF DIRECT REDUCED IRON AND...

Recovery of Rare Earth Elements

MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY GOLD ORES

PROCESS FOR REDUCED ALKALI CONSUMPTION IN THE RECOVERY OF SILVER