WO2008092995A1 - Method for selective flotation of copper - Google Patents

Method for selective flotation of copper Download PDF

Info

Publication number
WO2008092995A1
WO2008092995A1 PCT/FI2008/050030 FI2008050030W WO2008092995A1 WO 2008092995 A1 WO2008092995 A1 WO 2008092995A1 FI 2008050030 W FI2008050030 W FI 2008050030W WO 2008092995 A1 WO2008092995 A1 WO 2008092995A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper
flotation
sulphide
basic mineral
ore
Prior art date
Application number
PCT/FI2008/050030
Other languages
French (fr)
Inventor
Veikko Palosaari
Original Assignee
Outotec Oyj
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.)
Filing date
Publication date
Application filed by Outotec Oyj filed Critical Outotec Oyj
Priority to EP08709299A priority Critical patent/EP2117717A1/en
Priority to BRPI0806746-5A priority patent/BRPI0806746A2/en
Priority to EA200900872A priority patent/EA200900872A1/en
Publication of WO2008092995A1 publication Critical patent/WO2008092995A1/en

Links

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

PATENT 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.
PCT/FI2008/050030 2007-02-02 2008-01-31 Method for selective flotation of copper WO2008092995A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08709299A EP2117717A1 (en) 2007-02-02 2008-01-31 Method for selective flotation of copper
BRPI0806746-5A BRPI0806746A2 (en) 2007-02-02 2008-01-31 method for selective copper flotation
EA200900872A EA200900872A1 (en) 2007-02-02 2008-01-31 METHOD OF SELECTIVE FLOTATION OF COPPER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20070089 2007-02-02
FI20070089A FI119226B (en) 2007-02-02 2007-02-02 Method for Selective Foaming of Copper

Publications (1)

Publication Number Publication Date
WO2008092995A1 true WO2008092995A1 (en) 2008-08-07

Family

ID=37832134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2008/050030 WO2008092995A1 (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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9346062B2 (en) 2009-12-04 2016-05-24 Barrick Gold Corporation Separation of copper minerals from pyrite using air-metabisulfite treatment
US20160340756A1 (en) * 2014-01-31 2016-11-24 Goldcorp Inc. Process for separation of at least one metal sulfide from a mixed sulfide ore or concentrate
CN115069423A (en) * 2022-06-17 2022-09-20 中南大学 Method for sorting at least one sulfide ore based on pH regulation and control of Mo-Pb-Zn

Citations (3)

* Cited by examiner, † Cited by third party
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
US5439115A (en) * 1992-11-12 1995-08-08 Metallgesellschaft Aktiengesellschaft Process for selective flotation of copper-lead-zinc sulfide
RU2254931C2 (en) * 2003-07-28 2005-06-27 Открытое акционерное общество "Горно-металлургическая компания "Норильский никель" Method of concentration of sulfide copper-nickel ores

Patent Citations (3)

* Cited by examiner, † Cited by third party
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
US5439115A (en) * 1992-11-12 1995-08-08 Metallgesellschaft Aktiengesellschaft Process for selective flotation of copper-lead-zinc sulfide
RU2254931C2 (en) * 2003-07-28 2005-06-27 Открытое акционерное общество "Горно-металлургическая компания "Норильский никель" Method of concentration of sulfide copper-nickel ores

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9346062B2 (en) 2009-12-04 2016-05-24 Barrick Gold Corporation Separation of copper minerals from pyrite using air-metabisulfite treatment
US10258996B2 (en) 2009-12-04 2019-04-16 Barrick Gold Corporation Separation of copper minerals from pyrite using air-metabisulfite treatment
US20160340756A1 (en) * 2014-01-31 2016-11-24 Goldcorp Inc. Process for separation of at least one metal sulfide from a mixed sulfide ore or concentrate
US9885095B2 (en) * 2014-01-31 2018-02-06 Goldcorp Inc. Process for separation of at least one metal sulfide from a mixed sulfide ore or concentrate
CN115069423A (en) * 2022-06-17 2022-09-20 中南大学 Method for sorting at least one sulfide ore based on pH regulation and control of Mo-Pb-Zn
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

Also Published As

Publication number Publication date
EA200900872A1 (en) 2010-02-26
FI20070089A0 (en) 2007-02-02
PE20081332A1 (en) 2008-10-07
BRPI0806746A2 (en) 2011-09-13
EP2117717A1 (en) 2009-11-18
FI119226B (en) 2008-09-15
CL2008000171A1 (en) 2008-04-04

Similar Documents

Publication Publication Date Title
Muzenda An investigation into the effect of water quality on flotation performance
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
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
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08709299

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2008709299

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 200900872

Country of ref document: EA

ENP Entry into the national phase

Ref document number: PI0806746

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20090717