CA1173655A - Lixiviation acide pour le traitement des mattes magnetiques et amagnetiques a teneur de nickel et de cuivre - Google Patents

Lixiviation acide pour le traitement des mattes magnetiques et amagnetiques a teneur de nickel et de cuivre

Info

Publication number: CA1173655A
Authority: CA; Canada
Prior art keywords: copper; nickel; leach; matte; values
Prior art date: 1981-10-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

CA000390940A

Other languages

English (en)

Inventor

Derek G.E. Kerfoot

Dennis G. Maschmeyer

Donald R. Weir

Bauke Weizenbach

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Dynatec Corp

Original Assignee

Sherritt Gordon Mines Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1981-10-30

Filing date

1981-10-30

Publication date

1984-09-04

1981-10-30 Application filed by Sherritt Gordon Mines Ltd filed Critical Sherritt Gordon Mines Ltd

1981-10-30 Priority to CA000390940A priority Critical patent/CA1173655A/fr

1982-09-21 Priority to AU88583/82A priority patent/AU566762B2/en

1982-09-27 Priority to ZA827078A priority patent/ZA827078B/xx

1982-10-18 Priority to GB8229697A priority patent/GB2108480B/en

1982-10-29 Priority to FR8218268A priority patent/FR2515688B1/fr

1984-09-04 Application granted granted Critical

1984-09-04 Publication of CA1173655A publication Critical patent/CA1173655A/fr

Status Expired legal-status Critical Current

Links

YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 title claims abstract description 34
238000000034 method Methods 0.000 title claims description 36
230000008569 process Effects 0.000 title claims description 34
239000002253 acid Substances 0.000 title abstract description 14
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 239
239000010949 copper Substances 0.000 claims abstract description 148
229910052802 copper Inorganic materials 0.000 claims abstract description 120
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 110
229910052759 nickel Inorganic materials 0.000 claims abstract description 106
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
229910052742 iron Inorganic materials 0.000 claims abstract description 26
230000001590 oxidative effect Effects 0.000 claims abstract description 26
238000000746 purification Methods 0.000 claims abstract description 18
ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 11
238000001556 precipitation Methods 0.000 claims abstract description 11
238000011084 recovery Methods 0.000 claims description 19
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
229910052760 oxygen Inorganic materials 0.000 claims description 17
239000001301 oxygen Substances 0.000 claims description 17
238000002386 leaching Methods 0.000 claims description 16
238000006243 chemical reaction Methods 0.000 claims description 15
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
235000011149 sulphuric acid Nutrition 0.000 claims description 14
238000004090 dissolution Methods 0.000 claims description 13
239000001117 sulphuric acid Substances 0.000 claims description 11
UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 10
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
239000005864 Sulphur Substances 0.000 claims description 8
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 5
239000011260 aqueous acid Substances 0.000 claims description 5
BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 claims description 5
229910021653 sulphate ion Inorganic materials 0.000 claims description 5
239000002245 particle Substances 0.000 claims description 4
150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 4
238000004064 recycling Methods 0.000 claims description 2
238000010924 continuous production Methods 0.000 claims 1
239000012141 concentrate Substances 0.000 abstract description 10
230000002829 reductive effect Effects 0.000 abstract description 3
239000000243 solution Substances 0.000 description 77
229910052751 metal Inorganic materials 0.000 description 12
239000002184 metal Substances 0.000 description 12
238000005363 electrowinning Methods 0.000 description 10
238000000605 extraction Methods 0.000 description 10
229910017052 cobalt Inorganic materials 0.000 description 8
239000010941 cobalt Substances 0.000 description 8
GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 8
239000007787 solid Substances 0.000 description 8
230000003647 oxidation Effects 0.000 description 7
238000007254 oxidation reaction Methods 0.000 description 7
239000003792 electrolyte Substances 0.000 description 6
LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 6
YFLLTMUVNFGTIW-UHFFFAOYSA-N nickel;sulfanylidenecopper Chemical compound [Ni].[Cu]=S YFLLTMUVNFGTIW-UHFFFAOYSA-N 0.000 description 5
229910052955 covellite Inorganic materials 0.000 description 4
229910052717 sulfur Inorganic materials 0.000 description 4
BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 3
238000002441 X-ray diffraction Methods 0.000 description 3
OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 3
238000005649 metathesis reaction Methods 0.000 description 3
229910052953 millerite Inorganic materials 0.000 description 3
239000000203 mixture Substances 0.000 description 3
229910052711 selenium Inorganic materials 0.000 description 3
239000011669 selenium Substances 0.000 description 3
239000002002 slurry Substances 0.000 description 3
WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 3
229910000881 Cu alloy Inorganic materials 0.000 description 2
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
238000003723 Smelting Methods 0.000 description 2
239000003153 chemical reaction reagent Substances 0.000 description 2
229910000366 copper(II) sulfate Inorganic materials 0.000 description 2
230000003247 decreasing effect Effects 0.000 description 2
229910052739 hydrogen Inorganic materials 0.000 description 2
239000001257 hydrogen Substances 0.000 description 2
230000007062 hydrolysis Effects 0.000 description 2
238000006460 hydrolysis reaction Methods 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
229910001092 metal group alloy Inorganic materials 0.000 description 2
YGHCWPXPAHSSNA-UHFFFAOYSA-N nickel subsulfide Chemical compound [Ni].[Ni]=S.[Ni]=S YGHCWPXPAHSSNA-UHFFFAOYSA-N 0.000 description 2
229910000363 nickel(II) sulfate Inorganic materials 0.000 description 2
BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
-1 platinum group metals Chemical class 0.000 description 2
239000010970 precious metal Substances 0.000 description 2
MCAHWIHFGHIESP-UHFFFAOYSA-L selenite(2-) Chemical compound [O-][Se]([O-])=O MCAHWIHFGHIESP-UHFFFAOYSA-L 0.000 description 2
241000894007 species Species 0.000 description 2
101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 description 1
241000080590 Niso Species 0.000 description 1
241001237728 Precis Species 0.000 description 1
KTLOQXXVQYUCJU-UHFFFAOYSA-N [Cu].[Cu].[Se] Chemical compound [Cu].[Cu].[Se] KTLOQXXVQYUCJU-UHFFFAOYSA-N 0.000 description 1
230000002411 adverse Effects 0.000 description 1
238000004458 analytical method Methods 0.000 description 1
229910052932 antlerite Inorganic materials 0.000 description 1
239000007864 aqueous solution Substances 0.000 description 1
239000002131 composite material Substances 0.000 description 1
230000000332 continued effect Effects 0.000 description 1
238000007796 conventional method Methods 0.000 description 1
230000002950 deficient Effects 0.000 description 1
238000002050 diffraction method Methods 0.000 description 1
238000009854 hydrometallurgy Methods 0.000 description 1
239000007788 liquid Substances 0.000 description 1
238000007885 magnetic separation Methods 0.000 description 1
229910052976 metal sulfide Inorganic materials 0.000 description 1
150000002739 metals Chemical class 0.000 description 1
YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical group COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 1
239000000843 powder Substances 0.000 description 1
238000007670 refining Methods 0.000 description 1
230000008929 regeneration Effects 0.000 description 1
238000011069 regeneration method Methods 0.000 description 1
230000001105 regulatory effect Effects 0.000 description 1
229940082569 selenite Drugs 0.000 description 1
238000000926 separation method Methods 0.000 description 1
HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
238000005063 solubilization Methods 0.000 description 1
230000007928 solubilization Effects 0.000 description 1
238000000638 solvent extraction Methods 0.000 description 1
150000004763 sulfides Chemical class 0.000 description 1
NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
General Chemical & Material Sciences (AREA)
Manufacture And Refinement Of Metals (AREA)

CA000390940A 1981-10-30 1981-10-30 Lixiviation acide pour le traitement des mattes magnetiques et amagnetiques a teneur de nickel et de cuivre Expired CA1173655A (fr)

Priority Applications (5)

Application Number	Priority Date	Filing Date	Title
CA000390940A CA1173655A (fr)	1981-10-30	1981-10-30	Lixiviation acide pour le traitement des mattes magnetiques et amagnetiques a teneur de nickel et de cuivre
AU88583/82A AU566762B2 (en)	1981-10-30	1982-09-21	Acid leach process for nickel copper mattes
ZA827078A ZA827078B (en)	1981-10-30	1982-09-27	Acid leach process for treating magnetic and non-magnetic nickel-copper mattes
GB8229697A GB2108480B (en)	1981-10-30	1982-10-18	Acid leach process for treating magnetic and non-magnetic nickel-copper mattes
FR8218268A FR2515688B1 (fr)	1981-10-30	1982-10-29

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA000390940A CA1173655A (fr)	1981-10-30	1981-10-30	Lixiviation acide pour le traitement des mattes magnetiques et amagnetiques a teneur de nickel et de cuivre

Publications (1)

Publication Number	Publication Date
CA1173655A true CA1173655A (fr)	1984-09-04

Family

ID=4121506

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA000390940A Expired CA1173655A (fr)	1981-10-30	1981-10-30	Lixiviation acide pour le traitement des mattes magnetiques et amagnetiques a teneur de nickel et de cuivre

Country Status (5)

Country	Link
AU (1)	AU566762B2 (fr)
CA (1)	CA1173655A (fr)
FR (1)	FR2515688B1 (fr)
GB (1)	GB2108480B (fr)
ZA (1)	ZA827078B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
RU2252270C1 (ru) *	2003-11-11	2005-05-20	ОАО "Горно-металлургическая компания "Норильский никель"	Способ переработки плавленых сульфидных медно-никелевых материалов, содержащих кобальт, железо и металлы платиновой группы
WO2009153409A1 (fr) *	2008-06-19	2009-12-23	Norilsk Nickel Finland Oy	Procédé de lixiviation de matte de nickel en présence de cuivre additionné

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3203707B2 (ja) *	1991-10-09	2001-08-27	大平洋金属株式会社	酸化鉱石から有価金属を回収する方法
US5344479A (en) *	1992-03-13	1994-09-06	Sherritt Gordon Limited	Upgrading copper sulphide residues containing nickel and arsenic
AUPM790894A0 (en) *	1994-09-05	1994-09-29	Western Mining Corporation Limited	Mineral processing
FI97154C (fi) *	1994-11-15	1996-10-25	Outokumpu Eng Contract	Menetelmä nikkelikuparikiven liuottamiseksi
AUPN191395A0 (en) *	1995-03-22	1995-04-27	M.I.M. Holdings Limited	Atmospheric mineral leaching process
US5622615A (en) *	1996-01-04	1997-04-22	The University Of British Columbia	Process for electrowinning of copper matte
FI105926B (fi)	1998-03-16	2000-10-31	Outokumpu Oy	Menetelmä nikkelin liuottamiseksi nikkelikivestä
US7736487B2 (en)	2004-10-29	2010-06-15	Freeport-Mcmoran Corporation	Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solution extraction
AP2325A (en) *	2004-10-29	2011-11-23	Freeport Mcmoran Corp	Process for recovery of copper from copper-bearingmaterial using pressure leaching, direct electrow inning and solvent/solution extraction.
RU2337161C1 (ru) *	2007-04-16	2008-10-27	Государственное образовательное учреждение высшего профессионального образования "Московский государственный институт стали и сплавов" (технологический университет)	Способ извлечения меди чановым выщелачиванием из смешанных и окисленных руд
RU2384633C1 (ru) *	2008-08-19	2010-03-20	Федеральное государственное унитарное предприятие "Государственный научно-исследовательский, проектный и конструкторский институт горного дела и металлургии цветных металлов" (ФГУП "Гипроцветмет")	Способ переработки упорного медного сырья, содержащего благородные металлы
CN109536711B (zh) *	2018-11-06	2024-01-16	泰州华昊废金属综合利用有限公司	金属表面处理废物的资源化利用处理系统
CN111187922B (zh) *	2020-02-18	2022-05-06	云南锡业研究院有限公司	一种常压下从高镍铜锍中选择性浸出镍的方法
CN114921647B (zh) *	2022-06-01	2024-01-30	长沙有色冶金设计研究院有限公司	一种高冰镍在硫酸下氧压浸出方法
CN118207418A (zh) *	2024-03-04	2024-06-18	中伟新材料股份有限公司	镍回收方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3741752A (en) *	1971-01-22	1973-06-26	Sherritt Gordon Mines Ltd	Acid leaching process for treating high grade nickel-copper mattes
US4093526A (en) *	1977-09-08	1978-06-06	Amax Inc.	Hydrometallurgical leaching and refining of nickel-copper concentrates, and electrowinning of copper
CA1106617A (fr) *	1978-10-30	1981-08-11	Grigori S. Victorovich	Traduction non-disponible

1981
- 1981-10-30 CA CA000390940A patent/CA1173655A/fr not_active Expired
1982
- 1982-09-21 AU AU88583/82A patent/AU566762B2/en not_active Ceased
- 1982-09-27 ZA ZA827078A patent/ZA827078B/xx unknown
- 1982-10-18 GB GB8229697A patent/GB2108480B/en not_active Expired
- 1982-10-29 FR FR8218268A patent/FR2515688B1/fr not_active Expired

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
RU2252270C1 (ru) *	2003-11-11	2005-05-20	ОАО "Горно-металлургическая компания "Норильский никель"	Способ переработки плавленых сульфидных медно-никелевых материалов, содержащих кобальт, железо и металлы платиновой группы
WO2009153409A1 (fr) *	2008-06-19	2009-12-23	Norilsk Nickel Finland Oy	Procédé de lixiviation de matte de nickel en présence de cuivre additionné
AU2009259277B2 (en) *	2008-06-19	2015-02-12	Norilsk Nickel Harjavalta Oy	Method for leaching nickel matte in the presence of added copper

Also Published As

Publication number	Publication date
GB2108480A (en)	1983-05-18
FR2515688B1 (fr)	1986-01-17
AU8858382A (en)	1983-05-05
ZA827078B (en)	1983-08-31
AU566762B2 (en)	1987-10-29
FR2515688A1 (fr)	1983-05-06
GB2108480B (en)	1985-07-17

Legal Events

Date	Code	Title	Description
2001-09-05	MKEC	Expiry (correction)
2001-10-30	MKEX	Expiry

Publication	Publication Date	Title
CA2162626C (fr)	2002-07-09	Procede pour le lessivage d'une matte de nickel-cuivre
US4093526A (en)	1978-06-06	Hydrometallurgical leaching and refining of nickel-copper concentrates, and electrowinning of copper
US4304644A (en)	1981-12-08	Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt
AU662961B2 (en)	1995-09-21	Upgrading copper sulphide residues containing nickel and arsenic
EP1931807B1 (fr)	2012-07-25	Procede pour traiter une matiere premiere portant du nickel dans le cadre d'une lixiviation a base de chlorure
AU725971B2 (en)	2000-10-26	Method for leaching zinc concentrate in atmospheric conditions
US3293027A (en)	1966-12-20	Method of leaching high grade nickel matte
US9039806B2 (en)	2015-05-26	Recycling of solids in oxidative pressure leaching of metals using halide ions
AU2006329807B2 (en)	2011-09-29	Method for recovering rare metals in a zinc leaching process
US3616331A (en)	1971-10-26	Recovery of nickel and copper from sulfides
GB2108480A (en)	1983-05-18	Acid leach process for treating magnetic and non-magnetic nickel-copper mattes
US4594132A (en)	1986-06-10	Chloride hydrometallurgical process for production of copper
US3741752A (en)	1973-06-26	Acid leaching process for treating high grade nickel-copper mattes
US3957602A (en)	1976-05-18	Recovery of copper from chalcopyrite utilizing copper sulfate leach
WO2000065113A1 (fr)	2000-11-02	Procede de recuperation de metaux de valeur dans des alliages a base de fer
US3959097A (en)	1976-05-25	Selenium rejection during acid leaching of matte
AU2009259277B2 (en)	2015-02-12	Method for leaching nickel matte in the presence of added copper
CA2265391C (fr)	2005-10-25	Methode de lixiviation du nickel a partir de matte de nickel
WO2000073520A1 (fr)	2000-12-07	Recuperation de cobalt et de nickel a partir de matons et d'alliages riches en fer par lixiviation
US3734721A (en)	1973-05-22	Production of nickel powder from basic nickel carbonate
CN100354437C (zh)	2007-12-12	加工含有贵金属的硫化物矿石的方法
Deng	1995	Upgrading nickeliferous pyrrhotite concentrates by aqueous oxidation coupled with precipitation and flotation
ロー	1990	centrations, but cobalt extraction drops sharply with only a slight change in optimum con
Hackl	1983	Reduction leaching of chalcopyrite
MXPA99001433A (en)	2000-02-02	Method for leaching zinc concentrate in atmospheric conditions