EP0966325A1 - Verfahren zur anreicherung von silber oder anderen wertmetallen durch flotation aus einer suspension, beispielsweise aus den rückständen der zinklaugung - Google Patents
Verfahren zur anreicherung von silber oder anderen wertmetallen durch flotation aus einer suspension, beispielsweise aus den rückständen der zinklaugungInfo
- Publication number
- EP0966325A1 EP0966325A1 EP98904080A EP98904080A EP0966325A1 EP 0966325 A1 EP0966325 A1 EP 0966325A1 EP 98904080 A EP98904080 A EP 98904080A EP 98904080 A EP98904080 A EP 98904080A EP 0966325 A1 EP0966325 A1 EP 0966325A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ppm
- metal
- flotation
- zinc
- suspension
- 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- Withdrawn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
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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
-
- 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
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
-
- 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
Definitions
- the invention relates to a method for enriching silver or other valuable metals by flotation from a suspension, for example from the residues of zinc leaching.
- Such a method is known from DE 4323339.
- the silver is separated from the residue of the zinc leaching by flotation, the solid being assigned to the flotation in the drum of a drum mill with a certain energy consumption and the attritioned residue before the task then subjected to flotation.
- the att itiomer produces a considerable proportion of the finned grain which accumulates in the circuits of the downstream flotation and thus reduces the yield of the method.
- the suspension is adjusted to a solids content of 50 g / 1 to 500 g / 1 before the metal is added.
- the solids content is advantageously adjusted by adding ZnSO ⁇ solution.
- another, essentially neutral liquid such as water etc. can also be added.
- the metal is added in powder or dust form. A good result is achieved if the metal is selected from the group containing Zn, Fe, Al and Cd, especially if the metal is Zn.
- the organic additive is advantageously a polyalcohol or a polyol or a mixture thereof, the additive not necessarily having to be liquid at room temperature.
- Polyvinyl alcohol or polyether polyol are particularly advantageous.
- the organic additive is added in a concentration of 50 ppm to 500 ppm, in particular 100 ppm to 200 ppm.
- the added metal is advantageously added in a concentration of 300 ppm to 15,000 ppm, in particular 500 ppm to 5,000 ppm.
- the pH is advantageously adjusted by adding sulfuric acid. It is particularly advantageous here to use a process acid obtained in an upstream hydrometallurgical process, for example cell acid from zinc electrolysis.
- Contacting is preferably carried out at a temperature between 20 ° C and 150 ° C, possibly under pressure. A temperature between 40 ° C and 80 ° C is currently preferred. Contacting takes place over a period of 30 mm to 180 mm, advantageously 60 mm to 120 mm. The contact is made in a particularly simple manner by stirring, pumping over or by placing on a volume drum.
- Figure 1 A block diagram of a flotation device for
- the raw material that is used for the electrolytic production of zinc generally consists of sulfur-containing concentrates with silver contents in the ppm range.
- the first stage of the zinc production process is a rusting process, where sulfur is removed as sulfur dioxide and the zinc is mainly converted into acid-free oxide (rust material).
- the so-called leaching of the rust material takes place in dilute sulfuric acid (zinc cell acid) with subsequent neutralization. This creates a residue in which acid-insoluble constituents and neutralization products collect in solid form.
- This neutralization residue contains silver levels of a few hundred ppm. It is thickened in clarifying thickeners and prepared for flotation.
- the neutralization residue in the present exemplary embodiment is adjusted to a solids content of 300 g / l with ZnSOj solution.
- Metallic zinc in the form of zinc dust is then added in an amount of 5 kg / t of solid.
- polyether polyol is added to a concentration of 125 ppm.
- the mixture obtained in this way is contacted for 2 hours at 60 ° C. by stirring and is kept at a pH of 3.5 to 4.5 with the cell acid present in the zinc electrolysis.
- the mixture conditioned in this way is then subjected to a flotation device.
- Fig. 1 abandoned, the commercial collector AF 242 (manufactured by Dow Chemical) is added.
- the silver concentration in the charged solid was 520 ppm.
- the concentrate after the first stage contained 7,500 ppm silver, while the exit contained 170 ppm silver.
- a second flotation showed a silver concentration of 3,100 ppm in the concentrate and a concentration of 100 ppm in the finish. This results in an enrichment factor of 10.0 with an output of 82%.
- the flotation device in which the mixture thus prepared is floated is shown in FIG. 1.
- the conditioned mixture is added to a flotation column 2 via an inlet 1.
- the concentrate from the flotation column 2 goes into a total concentrate outlet 3, while an outlet 4 of the flotation column 2 goes to a rougher
- the concentrate obtained from the cleaner 6 is added to the total concentrate outlet 3, while the outlet of the cleaner 6 is again passed to the rougher 5 as a task.
- the silver in the total concentrate outlet is predominantly in the form of silver sulfide, which can then be processed using known processes for extracting silver.
- the present method can be carried out with different reagents depending on the operation.
- aluminum or iron dust can also be provided as a metal addition.
- the solids content in the suspension can also be adjusted with water and acidified with an acid other than sulfuric acid.
- the organic additive can be almost any polyalcohol or polyol.
- the conditioning of the proportion of valuable material in the suspension is so good in the present process that the subsequent flotation essentially without pusher and Foamer can be run. This is advantageous both for cost reasons and for reasons of environmental protection.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997110529 DE19710529A1 (de) | 1997-03-14 | 1997-03-14 | Verfahren zur Anreicherung von Silber oder anderen Wertmetallen durch Flotation aus einer Suspension, beispielsweise aus den Rückständen der Zinklaugung |
DE19710529 | 1997-03-14 | ||
PCT/EP1998/000218 WO1998041328A1 (de) | 1997-03-14 | 1998-01-16 | Verfahren zur anreicherung von silber oder anderen wertmetallen durch flotation aus einer suspension, beispielsweise aus den rückständen der zinklaugung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0966325A1 true EP0966325A1 (de) | 1999-12-29 |
Family
ID=7823325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98904080A Withdrawn EP0966325A1 (de) | 1997-03-14 | 1998-01-16 | Verfahren zur anreicherung von silber oder anderen wertmetallen durch flotation aus einer suspension, beispielsweise aus den rückständen der zinklaugung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0966325A1 (de) |
AU (1) | AU6210398A (de) |
DE (1) | DE19710529A1 (de) |
WO (1) | WO1998041328A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI122099B (fi) * | 2010-04-30 | 2011-08-31 | Outotec Oyj | Menetelmä arvometallien talteen ottamiseksi |
BR112019004862B1 (pt) | 2016-09-14 | 2021-09-28 | Outotec (Finland) Oy | Processo para a recuperação de metal precioso |
CN112337653A (zh) * | 2020-10-18 | 2021-02-09 | 赤峰中色锌业有限公司 | 一种提高高浸渣浮选银回收率的方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658510A (en) * | 1970-04-14 | 1972-04-25 | American Metal Climax Inc | Recovery of silver from electrolytic copper refinery slimes |
ES411058A1 (es) * | 1973-01-27 | 1975-12-01 | Asturiana De Zinc Sa | Procedimiento para concentrar por flotacion plomo y plata de productos que contienen el plomo de forma oxidada. |
BE829988A (fr) * | 1975-06-06 | 1975-10-01 | Procede de traitement des residus de lixiviation des minerais de zinc | |
US3996046A (en) * | 1975-07-25 | 1976-12-07 | Amax Inc. | Extraction and purification of silver from sulfates |
DE2656233C2 (de) * | 1976-12-11 | 1978-09-07 | Duisburger Kupferhuette, 4100 Duisburg | Verfahren zur selektiven Abtrennung und Gewinnung von Silber und Gold aus überwiegend chloridischen Lösungen |
JPS5952218B2 (ja) * | 1980-11-18 | 1984-12-18 | 住友金属鉱山株式会社 | 銅電解スライムよりの金の回収法 |
CA1206008A (en) * | 1982-02-24 | 1986-06-17 | Donald R. Weir | Recovery of zinc from zinc-containing sulphidic material |
DE3347165A1 (de) * | 1983-12-27 | 1985-07-04 | Skw Trostberg Ag, 8223 Trostberg | Verfahren zur gewinnung von edelmetallen |
DE3414571A1 (de) * | 1984-04-17 | 1985-10-24 | Linde Ag, 6200 Wiesbaden | Verfahren zur nutzbarmachung von metallvorkommen geringer konzentration |
US4895597A (en) * | 1986-01-16 | 1990-01-23 | Henkel Corporation | Recovery of precious metals |
US4878945A (en) * | 1986-05-29 | 1989-11-07 | Rein Raudsepp | Hydrometallurgical process for treating refractory ores containing precious metals |
US4881973A (en) * | 1988-02-01 | 1989-11-21 | E. I. Du Pont De Nemours And Company | Life silver recovery system |
MY105658A (en) * | 1989-03-07 | 1994-11-30 | Butler Dean R | Noble metal recovery |
FI88516C (fi) * | 1990-02-16 | 1993-05-25 | Outokumpu Oy | Hydrometallurgiskt foerfarande foer behandling av zinksulfidhaltiga raoaemnen |
US5332559A (en) * | 1991-07-10 | 1994-07-26 | Newmont Gold Co. | Biooxidation process for recovery of metal values from sulphur-containing ore materials |
ZA928157B (en) * | 1991-10-25 | 1993-06-09 | Sasox Processing Pty Ltd | Extraction or recovery of metal values. |
DE4323339C1 (de) * | 1993-07-13 | 1995-01-26 | Metallgesellschaft Ag | Verfahren zur Gewinnung von Silber aus dem Rückstand der Zinklaugung durch Flotation |
-
1997
- 1997-03-14 DE DE1997110529 patent/DE19710529A1/de not_active Ceased
-
1998
- 1998-01-16 EP EP98904080A patent/EP0966325A1/de not_active Withdrawn
- 1998-01-16 AU AU62103/98A patent/AU6210398A/en not_active Abandoned
- 1998-01-16 WO PCT/EP1998/000218 patent/WO1998041328A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9841328A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19710529A1 (de) | 1998-09-17 |
AU6210398A (en) | 1998-10-12 |
WO1998041328A1 (de) | 1998-09-24 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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RTI1 | Title (correction) |
Free format text: METHOD FOR ENRICHING SILVER AND EVENTUALLY OTHER PRECIOUS METALS BY FLOTATION FROM A SUSPENSION FROM ZINC-LEACHING RESIDUES |
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STAA | Information on the status of an ep patent application or granted ep patent |
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