EP2117717A1 - Method for selective flotation of copper - Google Patents
Method for selective flotation of copperInfo
- Publication number
- EP2117717A1 EP2117717A1 EP08709299A EP08709299A EP2117717A1 EP 2117717 A1 EP2117717 A1 EP 2117717A1 EP 08709299 A EP08709299 A EP 08709299A EP 08709299 A EP08709299 A EP 08709299A EP 2117717 A1 EP2117717 A1 EP 2117717A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- flotation
- sulphide
- basic mineral
- ore
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005188 flotation Methods 0.000 title claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 21
- 239000010949 copper Substances 0.000 title claims abstract description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 31
- 239000011707 mineral Substances 0.000 claims abstract description 31
- 239000006174 pH buffer Substances 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims description 21
- 230000000994 depressogenic effect Effects 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 13
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 12
- 239000011133 lead Substances 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000005864 Sulphur Substances 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 239000011701 zinc Substances 0.000 claims description 7
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 claims description 6
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 229910001779 copper mineral Inorganic materials 0.000 claims description 5
- 229920001353 Dextrin Polymers 0.000 claims description 4
- 239000004375 Dextrin Substances 0.000 claims description 4
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 4
- 235000019425 dextrin Nutrition 0.000 claims description 4
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 claims description 4
- 229910000514 dolomite Inorganic materials 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 235000010755 mineral Nutrition 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 4
- 239000005083 Zinc sulfide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 3
- 238000001139 pH measurement Methods 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 3
- 150000004763 sulfides Chemical class 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- PPUARQXOOBRUNI-UHFFFAOYSA-N [S--].[S--].[S--].[Cu++].[Zn++].[Pb++] Chemical compound [S--].[S--].[S--].[Cu++].[Zn++].[Pb++] PPUARQXOOBRUNI-UHFFFAOYSA-N 0.000 description 2
- 239000000872 buffer Substances 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- -1 lead-nickel sulphides Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229910052952 pyrrhotite Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Definitions
- the invention relates to a method whereby the pH buffer capacity of the feed that is routed to selective copper flotation is raised.
- the rise in pH buffer capacity is accomplished by feeding a soluble basic mineral among the ore in the pretreatment stage.
- the pH buffer capacity means the sensitivity to change and the reversal capacity of the pH of the feed as acid or alkaline chemicals are added.
- a complex copper sulphide ore for instance may contain zinc, lead, nickel and iron as separate sulphides. Selective separation of copper sulphide concentrate by flotation from these kinds of feed types can be done in several different ways.
- thionocarbamate compounds which are selective in relation to for example pyrite and pyrrhotite.
- valuable metal sulphides refer to copper, zinc and lead-nickel sulphides.
- Use of thionocarbamate compounds as a collector in the flotation of sulphide minerals is described for instance in US patent publication 4,584,097. The concentrate obtained is a bulk concentrate of copper, lead and zinc.
- suitable depressant chemicals should be used in this regard.
- suitable depressant chemicals include various sulphur oxocompounds such as metabisulphite (MBS) and dithionite as well as various organic depressant chemicals such as dextrin compounds.
- a copper concentrate is formed from a complex fine-ground sulphide ore by means of selective flotation by raising the buffer capacity of the ore feed entering flotation, whereupon flotation can be performed without multi-stage pH measurement and control.
- the invention relates to a method whereby the pH buffer capacity of the feed to be routed to selective copper flotation is raised.
- the copper sulphide concentrate is formed by performing the necessary pretreatment on a complex sulphide ore, after which the fine-ground ore is fed to separation flotation. In flotation, a copper collector chemical and lead sulphide, zinc sulphide, nickel sulphide and iron sulphide depressant chemicals are used.
- the increase in the pH buffer capacity of the complex sulphide ore takes place by feeding a soluble basic mineral with the ore in the pretreatment stage.
- the basic mineral is preferably limestone or dolomite.
- the basic mineral is added preferably to the crushing, grinding or conditioning stage of pretreatment, typically as chunks, chippings, powder or slurry.
- the amount of mineral to be fed is in the range of 0.05 - 5% of the amount of feed.
- the copper collector chemical used is preferably a thionocarbamate compound and the lead sulphide, zinc sulphide, nickel sulphide and iron sulphide depressant chemical some sulphur oxocompound such as metabisulphite or dithionite.
- depressant chemicals may be used, for instance organic depressants such as dextrin.
- a complex ore here means that it contains several valuable minerals, such as for example copper sulphide, zinc, lead and nickel sulphide as well as iron sulphides such as pyrite and magnetic pyrite.
- the pH buffer capacity of such kinds of complex ores is typically low.
- the necessary pretreatment is performed on the ore that is going to flotation, such as crushing, grinding and conditioning. It is also preferred that the electrochemical potential of the slurry entering copper separation flotation is adjusted to the best zone for copper minerals before flotation. Typically this is done by means of aeration.
- the pH buffer capacity of a complex sulphide ore can be regulated by adding a soluble basic mineral to the feed entering flotation.
- the amount of mineral required depends on the dosage requirement of the acidic depressant chemical, but typically it is 0.05 - 5% of the amount of the feed.
- the quality of the mineral is not a critical factor as long as it is sufficiently homogenous.
- the basic mineral is typically limestone, CaCO3.
- Another suitable mineral is for example dolomite, CaMg(CO 3 ) 2 and other basic minerals can also be used, such as various serpentinite minerals.
- Control of the pH buffer capacity enables the dosing of depressant chemicals without harmful pH fluctuations, because as it dissolves, the basic mineral balances out the pH value of the slurry, thus placing it in the target zone.
- a basic mineral is used for pH control, the pH of the slurry does not rise too high, which is a risk if some other chemical is used exclusively for pH control, such as dehydrated or slaked lime (CaO or Ca(OH) 2 ).
- the basic mineral is preferably added for example as chunks or chippings into the ore crushing or grinding stage, or as fine powder or slurry into the conditioning stage.
- the mineral prevents the electrochemical potential of the slurry from falling to too reducing for instance during iron bar or iron ball milling. In this way the mineral improves the operational requirements for selective copper flotation and diminishes the need for aeration in separation of the copper mineral in order to achieve the necessary electrochemical potential level.
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method whereby the pH buffer capacity of the feed routed to selective copper flotation is raised. The rise in pH buffer capacity is accomplished by feeding a soluble basic mineral among the ore in the pretreatment stage.
Description
METHOD FOR SELECTIVE FLOTATION OF COPPER
FIELD OF THE INVENTION
The invention relates to a method whereby the pH buffer capacity of the feed that is routed to selective copper flotation is raised. The rise in pH buffer capacity is accomplished by feeding a soluble basic mineral among the ore in the pretreatment stage. The pH buffer capacity means the sensitivity to change and the reversal capacity of the pH of the feed as acid or alkaline chemicals are added.
BACKGROUND OF THE INVENTION
Attempts have been made to find various methods to exploit fine complex sulphide ores, whereby different valuable minerals could be recovered selectively. A complex copper sulphide ore for instance may contain zinc, lead, nickel and iron as separate sulphides. Selective separation of copper sulphide concentrate by flotation from these kinds of feed types can be done in several different ways.
The selective flotation of copper from a copper-lead-zinc sulphide ore is described in US patent application 5,439,115. Pre-aeration of the ore slurry is typical of the method in order to achieve the desired oxidation-reduction potential range. After this the slurry is conditioned, it is aerated to exactly the desired potential of 60 - 340 mV and to a pH value of 8.5 - 10.0 by means of slaked lime (Ca(OH)2), and subsequently the selective flotation separation of copper is performed. Xanthate is used as the collector. After copper flotation the pH of the slurry is raised to a value of 9.3 - 12 with slaked lime to froth the lead. The large consumption of lime and weak selectivity can be considered to be the disadvantages of this method, particularly in the treatment of partially oxidized ores.
Another selective flotation method for copper from a copper-lead-zinc sulphide ore is described in US patent publication 5,074,994, in which the ore slurry is conditioned by means of bisulphite and causticized starch at a
pH of 5.7 - 6.5. The conditioning chemicals also function as zinc and lead depressants. After conditioning, selective flotation of copper is performed using a combination of dithiophosphates and dithiophosphinates.
One known group of valuable metal sulphide collectors are thionocarbamate compounds, which are selective in relation to for example pyrite and pyrrhotite. In this connection valuable metal sulphides refer to copper, zinc and lead-nickel sulphides. Use of thionocarbamate compounds as a collector in the flotation of sulphide minerals is described for instance in US patent publication 4,584,097. The concentrate obtained is a bulk concentrate of copper, lead and zinc.
When the material for treatment contains several sulphides i.e. a complex sulphide ore, where one wishes to use a thionocarbamate compound as collector and to form copper sulphide concentrate, that does not include significant amounts of zinc or lead, suitable depressant chemicals should be used in this regard. Known lead and zinc sulphide depressants include various sulphur oxocompounds such as metabisulphite (MBS) and dithionite as well as various organic depressant chemicals such as dextrin compounds. The method works well at electrochemical potential ranges typical of copper minerals, but the drawback is that sharp copper flotation only takes place in quite a narrow pH range, typically 6.5 - 7.0, preferably 6.7 - 6.9, whereupon the selectivity with regard to lead sulphides and zinc sulphides is best. To guarantee sufficient flotation time, maintenance of selectivity requires the dosing of sulphur oxocompounds functioning as depressant chemicals at several points in the flotation circuit. This in turn leads to variation in pH level and thus to non-selectivity without multi-stage pH measurement and control for feeds that possess a low pH buffer capacity.
PURPOSE OF THE INVENTION
The purpose of the present invention is to eliminate the shortcomings of the methods according to the prior art described above. According to this method a copper concentrate is formed from a complex fine-ground sulphide ore by
means of selective flotation by raising the buffer capacity of the ore feed entering flotation, whereupon flotation can be performed without multi-stage pH measurement and control.
SUMMARY OF THE INVENTION
The essential features of the invention will be made apparent in the attached claims.
The invention relates to a method whereby the pH buffer capacity of the feed to be routed to selective copper flotation is raised. The copper sulphide concentrate is formed by performing the necessary pretreatment on a complex sulphide ore, after which the fine-ground ore is fed to separation flotation. In flotation, a copper collector chemical and lead sulphide, zinc sulphide, nickel sulphide and iron sulphide depressant chemicals are used. The increase in the pH buffer capacity of the complex sulphide ore takes place by feeding a soluble basic mineral with the ore in the pretreatment stage.
The basic mineral is preferably limestone or dolomite. The basic mineral is added preferably to the crushing, grinding or conditioning stage of pretreatment, typically as chunks, chippings, powder or slurry. The amount of mineral to be fed is in the range of 0.05 - 5% of the amount of feed.
The copper collector chemical used is preferably a thionocarbamate compound and the lead sulphide, zinc sulphide, nickel sulphide and iron sulphide depressant chemical some sulphur oxocompound such as metabisulphite or dithionite. In addition to oxocompounds, other depressant chemicals may be used, for instance organic depressants such as dextrin.
DETAILED DESCRIPTION OF THE INVENTION
The utilization of pure sulphide ores is generally relatively straightforward, but since they are limited in quantity, it is becoming more common to study and utilize complex fine sulphide ores. A complex ore here means that it
contains several valuable minerals, such as for example copper sulphide, zinc, lead and nickel sulphide as well as iron sulphides such as pyrite and magnetic pyrite. The pH buffer capacity of such kinds of complex ores is typically low.
Obviously, the necessary pretreatment is performed on the ore that is going to flotation, such as crushing, grinding and conditioning. It is also preferred that the electrochemical potential of the slurry entering copper separation flotation is adjusted to the best zone for copper minerals before flotation. Typically this is done by means of aeration.
One practicable method for fabricating a selective copper flotation concentrate from a complex sulphide ore is described in the prior art, in which a thionocarbamate compound is used as the collector chemical and some oxocompound of sulphur is used as depressant chemical, such as metabisulphite (MBS) or dithionite and if necessary other depressants, for example organic depressant chemicals such as dextrin. As stated above, the drawback of the method is considered to be the relatively narrow pH zone it requires to maintain selectivity in a flotation circuit with sufficient retention time, resulting in the need for multi-stage pH measurement and pH control for feeds with a low buffer capacity. The pH buffer capacity of typical complex ores is low, because they do not generally contain basic gangue minerals.
Now a method has been developed, in accordance with which the pH buffer capacity of a complex sulphide ore can be regulated by adding a soluble basic mineral to the feed entering flotation. The amount of mineral required depends on the dosage requirement of the acidic depressant chemical, but typically it is 0.05 - 5% of the amount of the feed. The quality of the mineral is not a critical factor as long as it is sufficiently homogenous. The basic mineral is typically limestone, CaCO3. Another suitable mineral is for example dolomite, CaMg(CO3)2 and other basic minerals can also be used, such as various serpentinite minerals.
Control of the pH buffer capacity enables the dosing of depressant chemicals without harmful pH fluctuations, because as it dissolves, the basic mineral balances out the pH value of the slurry, thus placing it in the target zone. When a basic mineral is used for pH control, the pH of the slurry does not rise too high, which is a risk if some other chemical is used exclusively for pH control, such as dehydrated or slaked lime (CaO or Ca(OH)2).
The basic mineral is preferably added for example as chunks or chippings into the ore crushing or grinding stage, or as fine powder or slurry into the conditioning stage. When added to the grinding feed, the mineral prevents the electrochemical potential of the slurry from falling to too reducing for instance during iron bar or iron ball milling. In this way the mineral improves the operational requirements for selective copper flotation and diminishes the need for aeration in separation of the copper mineral in order to achieve the necessary electrochemical potential level.
Claims
1. A method for raising the pH buffer capacity of the feed for selective copper flotation, whereby copper sulphide concentrate is formed by carrying out the necessary pretreatment on a complex sulphide ore, after which the fine ore is fed to separation-flotation, where a copper collector chemical and lead, zinc, nickel and iron sulphide depressant chemicals are used, characterised in that a basic mineral that dissolves in the pretreatment stage is fed with the complex sulphide ore in order to raise the pH buffer capacity of the ore.
2. A method according to claim 1 , characterised in that the basic mineral is limestone.
3. A method according to claim 1 , characterised in that the basic mineral is dolomite.
4. A method according to claim 1, characterised in that the basic mineral is a serpentinite mineral.
5. A method according to claim 1 , characterised in that the basic mineral is added to the crushing, grinding or conditioning stage of pretreatment.
6. A method according to claim 5, characterised in that the basic mineral is added as chunks or chippings to the crushing or grinding stage.
7. A method according to claim 5, characterised in that the basic mineral is added as powder or slurry to the conditioning stage.
8. A method according to claim 1 , characterised in that the amount of the basic mineral to be fed is 0.05 - 5% of the feed amount.
9. A method according to claim 1, characterised in that a thionocarbamate compound is used as the copper collector chemical.
10. A method according to claim 1 , characterised in that a sulphur oxocompound is used as the depressant chemical.
11.A method according to claim 10, characterised in that metabisulphite is used as the sulphur oxocompound.
12. A method according to claim 10, characterised in that dithionite is used as the sulphur oxocompound.
13. A method according to claim 1 , characterised in that an organic depressant is used as the depressant chemical.
14. A method according to claim 13, characterised in that dextrin is used as the organic depressant.
15. A method according to claim 1, characterised in that the electrochemical potential of the slurry is adjusted to the optimal zone for the separation of the copper minerals before the separation flotation.
16. A method according to claim 15, characterised in that the electrochemical potential of the slurry is adjusted to the optimal zone for the separation of the copper minerals by means of aeration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20070089A FI119226B (en) | 2007-02-02 | 2007-02-02 | Method for Selective Foaming of Copper |
| PCT/FI2008/050030 WO2008092995A1 (en) | 2007-02-02 | 2008-01-31 | Method for selective flotation of copper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2117717A1 true EP2117717A1 (en) | 2009-11-18 |
Family
ID=37832134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08709299A Withdrawn EP2117717A1 (en) | 2007-02-02 | 2008-01-31 | Method for selective flotation of copper |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2117717A1 (en) |
| BR (1) | BRPI0806746A2 (en) |
| CL (1) | CL2008000171A1 (en) |
| EA (1) | EA200900872A1 (en) |
| FI (1) | FI119226B (en) |
| PE (1) | PE20081332A1 (en) |
| WO (1) | WO2008092995A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR079301A1 (en) | 2009-12-04 | 2012-01-18 | Barrick Gold Corp | PIRITA COPPER MINERAL SEPARATION USING AN METABISULPHITE AIR TREATMENT |
| CA2952568C (en) * | 2014-01-31 | 2018-07-10 | Goldcorp Inc. | Process for separation of at least one metal sulfide from a mixed sulfide ore or concentrate |
| CN115069423B (en) * | 2022-06-17 | 2023-03-14 | 中南大学 | Method for sorting at least one sulfide ore based on pH regulation and control of Mo-Pb-Zn |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5074994A (en) * | 1990-10-18 | 1991-12-24 | The Doe Run Company | Sequential and selective flotation of sulfide ores |
| DE4238244C2 (en) * | 1992-11-12 | 1994-09-08 | Metallgesellschaft Ag | Process for the selective flotation of a sulfidic copper-lead-zinc ore |
| RU2254931C2 (en) * | 2003-07-28 | 2005-06-27 | Открытое акционерное общество "Горно-металлургическая компания "Норильский никель" | Method of concentration of sulfide copper-nickel ores |
-
2007
- 2007-02-02 FI FI20070089A patent/FI119226B/en not_active IP Right Cessation
-
2008
- 2008-01-21 CL CL200800171A patent/CL2008000171A1/en unknown
- 2008-01-24 PE PE2008000183A patent/PE20081332A1/en not_active Application Discontinuation
- 2008-01-31 BR BRPI0806746-5A patent/BRPI0806746A2/en not_active IP Right Cessation
- 2008-01-31 WO PCT/FI2008/050030 patent/WO2008092995A1/en active Application Filing
- 2008-01-31 EP EP08709299A patent/EP2117717A1/en not_active Withdrawn
- 2008-01-31 EA EA200900872A patent/EA200900872A1/en unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008092995A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| PE20081332A1 (en) | 2008-10-07 |
| FI20070089A0 (en) | 2007-02-02 |
| BRPI0806746A2 (en) | 2011-09-13 |
| EA200900872A1 (en) | 2010-02-26 |
| CL2008000171A1 (en) | 2008-04-04 |
| FI119226B (en) | 2008-09-15 |
| WO2008092995A1 (en) | 2008-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104718027B (en) | The method for improving selectivity and the rate of recovery in the flotation of the nickel sulfide ores containing magnetic iron ore by using the synergy of various inhibitors | |
| US5110455A (en) | Method for achieving enhanced copper flotation concentrate grade by oxidation and flotation | |
| CN101537388B (en) | Separation method for bismuth-molybdenum-copper-sulfide mixed concentrate | |
| CN103551245B (en) | Complex multi-metal micro fine particle sulphide ore is carried out to the beneficiation method of synthetical recovery | |
| CN102371212A (en) | Technology of enhanced-dispersion partial selective and bulk flotation of lead and zinc sulfide ores under low and high alkalinity | |
| CN106391318B (en) | Method for sorting high-mud copper-lead oxide polymetallic ores | |
| US6092666A (en) | Reduction of pH modifying agent in the flotation of copper minerals | |
| CN101985111A (en) | Copper-sulfur ore separation method | |
| CN101402071A (en) | Electric potential regulating and controling differential flotation process for copper-plumbum-zinc vulcanizing mine | |
| Hintikka et al. | Potential control in the flotation of sulphide minerals and precious metals | |
| CN103447155A (en) | Ore dressing method for blue chalcocite and pyrite and collecting agent used in ore dressing method | |
| CN107350083B (en) | Beneficiation method of high-mud high-order-generation copper sulfide ore and combined regulator used for beneficiation method | |
| AU2014292221B2 (en) | Method for recovering a copper sulfide from an ore containing an iron sulfide | |
| US6041941A (en) | Reagent consumption in mineral separation circuits | |
| CN101003029A (en) | Method for floating inhibited iron sulfide minerals | |
| EP2117717A1 (en) | Method for selective flotation of copper | |
| US20140305848A1 (en) | Method for improving selectivity and recovery in the flotation of nickel sulphide ores that contain pyrrhotite by exploiting the synergy of multiple depressants | |
| CN107282313A (en) | Separation inhibitor for galena and secondary copper minerals and application thereof | |
| CN101623674A (en) | Method for floating inhibited iron sulfide minerals | |
| CN101722096A (en) | Ore dressing method for eliminating activation of unavoidable ions on copper, lead and zinc and improving separating effect of copper, lead and zinc | |
| Silvestre et al. | Dispersion effect on a lead–zinc sulphide ore flotation | |
| CN107570318A (en) | Beneficiation method for recovering copper from molybdenum dressing tailings | |
| CA2116276C (en) | Flotation processes | |
| US9839917B2 (en) | Method for recovering a copper sulfide concentrate from an ore containing an iron sulfide | |
| Ng'Andu | The effect of underground mine water on performance of the Mufulira flotation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20090710 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Effective date: 20100928 |