FR2653450A1 - - Google Patents
Download PDFInfo
- Publication number
- FR2653450A1 FR2653450A1 FR9012920A FR9012920A FR2653450A1 FR 2653450 A1 FR2653450 A1 FR 2653450A1 FR 9012920 A FR9012920 A FR 9012920A FR 9012920 A FR9012920 A FR 9012920A FR 2653450 A1 FR2653450 A1 FR 2653450A1
- Authority
- FR
- France
- Prior art keywords
- zinc
- solution
- carbonate
- lead
- ammonia
- Prior art date
- 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.)
- Withdrawn
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 52
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 39
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000011701 zinc Substances 0.000 claims abstract description 28
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 28
- 239000011133 lead Substances 0.000 claims abstract description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 22
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 21
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011575 calcium Substances 0.000 claims abstract description 15
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002386 leaching Methods 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 6
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 6
- 238000009835 boiling Methods 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000007513 acids Chemical class 0.000 claims abstract description 5
- 239000002244 precipitate Substances 0.000 claims abstract description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims abstract 6
- 238000001354 calcination Methods 0.000 claims abstract 4
- 239000000243 solution Substances 0.000 claims description 40
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 16
- 235000004416 zinc carbonate Nutrition 0.000 claims description 15
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 claims description 14
- 239000011667 zinc carbonate Substances 0.000 claims description 12
- 229910000010 zinc carbonate Inorganic materials 0.000 claims description 12
- 229910000003 Lead carbonate Inorganic materials 0.000 claims description 10
- MFEVGQHCNVXMER-UHFFFAOYSA-L 1,3,2$l^{2}-dioxaplumbetan-4-one Chemical compound [Pb+2].[O-]C([O-])=O MFEVGQHCNVXMER-UHFFFAOYSA-L 0.000 claims description 9
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 235000010755 mineral Nutrition 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 239000001099 ammonium carbonate Substances 0.000 claims description 4
- 229910001656 zinc mineral Inorganic materials 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000510 noble metal Inorganic materials 0.000 claims description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 2
- PVNIIMVLHYAWGP-UHFFFAOYSA-N Niacin Chemical compound OC(=O)C1=CC=CN=C1 PVNIIMVLHYAWGP-UHFFFAOYSA-N 0.000 claims 3
- HHICRQHZPBOQPI-UHFFFAOYSA-L diazanium;zinc;dicarbonate Chemical compound [NH4+].[NH4+].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O HHICRQHZPBOQPI-UHFFFAOYSA-L 0.000 claims 3
- 150000001768 cations Chemical class 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 claims 1
- 229940059913 ammonium carbonate Drugs 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 238000009628 steelmaking Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 7
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 6
- 235000010216 calcium carbonate Nutrition 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 4
- 101100424627 Caenorhabditis elegans mec-12 gene Proteins 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- NSEQHAPSDIEVCD-UHFFFAOYSA-N N.[Zn+2] Chemical compound N.[Zn+2] NSEQHAPSDIEVCD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920002359 Tetronic® Polymers 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241001317416 Lius Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- RZYDLJBNXQXMHW-UHFFFAOYSA-N [Ca].[Zn].[Pb] Chemical compound [Ca].[Zn].[Pb] RZYDLJBNXQXMHW-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940105847 calamine Drugs 0.000 description 1
- ONIOAEVPMYCHKX-UHFFFAOYSA-N carbonic acid;zinc Chemical compound [Zn].OC(O)=O ONIOAEVPMYCHKX-UHFFFAOYSA-N 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 229910052864 hemimorphite Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 oxy- Chemical class 0.000 description 1
- 235000009991 pite Nutrition 0.000 description 1
- 244000293655 pite Species 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- CPYIZQLXMGRKSW-UHFFFAOYSA-N zinc;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Zn+2] CPYIZQLXMGRKSW-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G21/00—Compounds of lead
- C01G21/14—Carbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- 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
- C22B13/00—Obtaining lead
- C22B13/04—Obtaining lead by wet processes
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/24—Obtaining zinc otherwise than by distilling with leaching with alkaline solutions, e.g. ammonia
-
- 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
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
- C22B3/14—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Electrolytic Production Of Metals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT00522189A IT1236233B (it) | 1989-10-20 | 1989-10-20 | Metodo per il recupero selettivo di piombo, zinco e calcio da materialii che li contengono sotto forma di ossidi o sali insolubili in acqua |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2653450A1 true FR2653450A1 (enrdf_load_stackoverflow) | 1991-04-26 |
Family
ID=11119565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9012920A Withdrawn FR2653450A1 (enrdf_load_stackoverflow) | 1989-10-20 | 1990-10-18 |
Country Status (6)
Country | Link |
---|---|
CA (1) | CA2025161A1 (enrdf_load_stackoverflow) |
DE (1) | DE4033232A1 (enrdf_load_stackoverflow) |
ES (1) | ES2026406A6 (enrdf_load_stackoverflow) |
FR (1) | FR2653450A1 (enrdf_load_stackoverflow) |
GB (1) | GB2238528A (enrdf_load_stackoverflow) |
IT (1) | IT1236233B (enrdf_load_stackoverflow) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1006277A3 (nl) * | 1992-10-05 | 1994-07-12 | Union Miniere Sa | Werkwijze voor het hydrometallurgisch verwerken van een materiaal met oplosbare en onoplosbare bestanddelen zoals zinkhoudende vliegstof. |
ES2104508B1 (es) * | 1995-04-10 | 1998-07-01 | Aser Sa | Procedimiento para el tratamiento hidrometalurgico de depuracion de oxido waelz mediante su lixiviacion con carbonato sodico. |
WO1998036102A1 (en) * | 1997-02-17 | 1998-08-20 | Buka Technologies Pty. Ltd. | Refining zinc sulphide ores |
RU2118388C1 (ru) * | 1998-01-14 | 1998-08-27 | Сергей Иванович Черных | Способ переработки цинксодержащих материалов |
RU2198941C2 (ru) * | 2000-08-08 | 2003-02-20 | Закрытое акционерное общество "Техноген" | Способ переработки материала, преимущественно содержащего никель, кобальт, молибден, ванадий в неорганической, например оксидной, основе |
EP1454886A1 (en) * | 2003-03-04 | 2004-09-08 | SOLECO s.r.l. | Process for disposal of calcareous mud |
ITMI20072257A1 (it) | 2007-11-30 | 2009-06-01 | Engitec Technologies S P A | Processo per produrre piombo metallico a partire da pastello desolforato |
CN111549235A (zh) * | 2019-02-08 | 2020-08-18 | 北京中金瑞丰环保科技有限公司 | 一种含铅原料的分离方法 |
-
1989
- 1989-10-20 IT IT00522189A patent/IT1236233B/it active IP Right Grant
-
1990
- 1990-09-12 CA CA002025161A patent/CA2025161A1/en not_active Abandoned
- 1990-10-17 ES ES9002835A patent/ES2026406A6/es not_active Expired - Fee Related
- 1990-10-18 GB GB9022673A patent/GB2238528A/en not_active Withdrawn
- 1990-10-18 FR FR9012920A patent/FR2653450A1/fr not_active Withdrawn
- 1990-10-19 DE DE4033232A patent/DE4033232A1/de not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
IT1236233B (it) | 1993-01-27 |
CA2025161A1 (en) | 1991-04-21 |
ES2026406A6 (es) | 1992-04-16 |
DE4033232A1 (de) | 1991-04-25 |
GB2238528A (en) | 1991-06-05 |
IT8905221A0 (it) | 1989-10-20 |
IT8905221A1 (it) | 1991-04-20 |
GB9022673D0 (en) | 1990-11-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2798302C (en) | Process for recovering valuable metals from precious metal smelting slag | |
JP2008540835A (ja) | 電炉その他の炉から排出される酸化亜鉛とジンクフェライトを含むダストや残滓の処理工程 | |
AU2006329807A1 (en) | Method for recovering rare metals in a zinc leaching process | |
ZA200602040B (en) | Method for processing anode sludge | |
WO2014096545A1 (en) | Method and apparatus for acid granulation of matte | |
CN106477533A (zh) | 一种铜阳极泥分离回收硒和碲的方法 | |
FR2653450A1 (enrdf_load_stackoverflow) | ||
JP5146017B2 (ja) | 鉛アノードスライムの塩素浸出方法 | |
US4594102A (en) | Recovery of cobalt and nickel from sulphidic material | |
CN109055764B (zh) | 一种高氯低锌物料的综合回收方法 | |
JP6488312B2 (ja) | 鉛および銀の選択的な回収方法 | |
CA1083826A (en) | Process for extracting silver from residues containing silver and lead | |
WO2019155430A1 (en) | Process for recovering vanadium in the form of iron vanadate from a gasifier slag | |
CA2749907C (en) | Process for recovering metals in the form of metal chlorides or mixed metal chlorides from slag waste materials | |
EA007523B1 (ru) | Способ извлечения металлов с использованием хлоридного выщелачивания и экстракции | |
US4374098A (en) | Method of concentrating silver from anode slime | |
JPS58126937A (ja) | マツトからの金属有価物の回収方法 | |
JPS6352094B2 (enrdf_load_stackoverflow) | ||
CN105907985A (zh) | 一种金矿中提取金并提纯的方法 | |
CN113355517A (zh) | 一种在锌冶炼过程中无害化处理回收镁氟污酸的方法 | |
NO164665B (no) | Fremgangsmaate for gjenvinning av aluminium fra avfallsmateriale. | |
US4737351A (en) | Process for the recovery of tin | |
US629856A (en) | Process of extracting lead, zinc, or silver from complex sulfidic ores. | |
US1895580A (en) | Treatment of bauxite, alunite, and like aluminous material | |
US2017612A (en) | Improvements in hydrometallurgical recovery of lead from ores and other lead bearing materials |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ER | Errata listed in the french official journal (bopi) |
Free format text: 17/91 |
|
ST | Notification of lapse |