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
  • B03D1/004—Organic compounds
  • B03D1/01—Organic compounds containing nitrogen
• • 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
  • B03D1/001—Flotation agents
  • B03D1/004—Organic compounds
  • B03D1/014—Organic compounds containing phosphorus
• • 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
  • B03D2203/00—Specified materials treated by the flotation agents; specified applications
  • B03D2203/02—Ores

Definitions

• the present invention relates to the use of collectors in the flotation of sulfidic ores.
• Collectors cause a wetting of the surface of the valuable mineral, which leads to a hydrophobization of the mineral particles.
• air bubbles are produced, to which the hydrophobized mineral particles adhere and are discharged with these to the surface of the flotation pulp.
• the floating value mineral, called concentrate is skimmed off, while gangue minerals remain in the pulp.
• Foamer is added to modify the foaming.
• foaming agents include alcohols, polypropylene glycols and their ethers, and MIBC (methylisobutylcarbinol).
• U.S. 4,699,711 discloses a process for flotation of sulfide minerals with preferably short chain alkyl substituted thionocarbamates.
• WO-02/38277 discloses the use of mixtures of thionocarbamates and mercaptobenzothiazoles as collectors for the flotation of sulfidic ores, particularly copper ore associated with molybdenum and gold.
• U.S. 2,875,896 discloses a foam flotation process using 8-quinolinol and heating oil as a collector.
• U.S. 4,178,235 discloses the use of 5-hydroxyquinolinol as the sole collector in foam floatation.
• GB-A-798 769 and US-A-4,178,235 describe the flotation of niobium minerals with 8-quinolinol and 5-hydroxyquinoline, respectively.
• GB-A-826,827 describes in addition to 8-quinolinol still alkyl-substituted 8-quinolinol derivatives for the flotation of niobium minerals.
• 8-quinolinol has a high affinity for metal ions and forms with these complexes, so-called oxinates. Therefore, 8-quinolinol is also used as a precipitating reagent for various metal ions.
• GB-A-887 469 describes a method of recovering 8-quinolinol after use.
• dialkyl dithiophosphates When pyrite-containing ores are flotated at pH values below 10 with commercially available sulfidic collectors such as dialkyl dithiophosphates, xanthates, dialkyl xanthenormiates or dialkyl thionocarbamates, concentrates with relatively high pyrite concentrations are obtained.
• the dialkylthionocarbamates are already considered to be very selective towards pyrite compared to xanthates and dithiophosphates.
• This high pyrite content has a negative effect on the subsequent processing of the concentrate.
• the effectiveness of the reduction process is reduced and high levels of sulfur oxides are formed, which pollute the environment or cause their disposal to incur high costs.
• lime is added to the flotation pulp, which causes an increase in the pH of the flotation pulp to more than 10, depending on the amount.
• the added Lime quantities vary depending on the pyrite content between zero and several kg per ton of ore.
• the lime thus contributes significantly to the reagent costs of the flotation process. Reducing the amount of lime and lowering the pH to less than 10 would thus not only contribute to the reduction of sulfur oxide emissions into the environment, but also bring about a saving in reagent costs.
• the object of the present invention was to find an improved collector type for sulfidic ores, which gives better flotation results than prior art collectors.
• the object of the invention is furthermore to reduce the required amounts of pH modifiers, in particular lime, which is used for increasing the pH and for pressing pyrite.
• the invention thus relates to a flotation reagent for sulfidic ores, comprising at least one compound of the formula (1) wherein R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are independently hydrogen or groups containing 1 to 15 carbon atoms or groups containing oxygen or nitrogen, and at least one other, serving as a collector for sulfidic ores compound which contains at least one sulfur atom which is bonded directly to a carbon or phosphorus atom, and wherein said carbon or phosphorus atom is directly bonded to at least one further sulfur atom or to a nitrogen atom or to an oxygen atom, wherein the mixing ratio of the compounds of formula 1 to the other collectors is 0.1: 99.9 to 20:80.
• Another object of the invention is the use of the flotation reagent according to the invention for the flotation of sulfidic ores.
• Another object of the invention is a method for flotation of sulfidic ores by bringing the flotation reagent according to the invention with the sulfidic ores in contact.
• Another object of the invention is the use of compounds of formula 1 as additive to collectors for sulfidic ores.
• the flotation reagent according to the invention improved results in selectivity and yield can be achieved in the flotation of metal sulfides in comparison to standard collectors.
• the already towards pyrite selective properties of the other collectors can be significantly improved by using compounds of formula (I).
• ores which have a high pyrite content and are usually floated at a pH above 10 can be floated already at pH values of 7 to 10, for example at pH 8.5 to 9.0.
• the co-filtered pyrite content in the resulting concentrate is significantly lower than with currently available collectors at the same pH value or the value of mineral content is higher.
• the sulfidic ores are preferably copper-containing ores which have up to 90% by weight of pyritic fractions.
• the flotation reagent according to the invention can be used in a wide pH range, for example 2 to 12, preferably 5 to 12, and is added to the aqueous pulp in a concentration of preferably 0.001 to 1.0 kg / ton of crude ore.
• the compounds of the formula (1) are those in which R 2 , R 3 , R 4 , R 5 , R 6 and R 7 independently of one another are H or C 1 - to C 4 -alkyl, especially all H mean.
• the other collectors in preferred embodiments are those compounds which are structural units of the formulas in which the released valences are saturated by organic radicals or sulfur atoms.
• the further collectors are dithiophosphates of the formula (6) or Xanthate of the formula (7) or to xanthogen formates of the formula (8) or thionocarbamates of formula 9 or mercaptobenzothiazoles of the formula 10 wherein R 8 and R 9 independently of one another are hydrocarbon radicals having 1 to 10 carbon atoms, in particular C 1 - to C 10 -alkyl, C 1 - to C 10 -alkenyl, C 1 - to C 5 -alkyl, C 1 - to C 5 - Alkenyl, phenyl, benzyl or naphthyl, and M + stand for a cation, in particular a metal ion or an ammonium ion.
• the mixing ratio of the compounds of the formula 1 to the other collectors represented by the formulas 2 to 10 is preferably 0.1: 99.9 to 20:80, in particular 1:99 to 10:90.
• the flotation reagent according to the invention contains between 0.1 and 20% by weight of 8-quinolinol.
• the following table represents the flotative results of the inventive collector in comparison to the standard reagent.
• Laboratory flotation experiments on a Chilean copper ore have been carried out.
• As a standard reagent (Comparative Examples 4 to 6), an ethylthio, O-Isopropylthionocarbamat and a dosage of 14 g / t Roherz task was used.
• a commercial foamer (MIBC) was added at a dosage of 15 g / t ore.
• the invention is illustrated in the Examples (Examples 1 to 3). It corresponds to the 94.4% ethylthio, O-isopropylthionocarbamate with an addition of 5.6% 8-quinolinol.

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• Manufacture And Refinement Of Metals (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Medicines Containing Material From Animals Or Micro-Organisms (AREA)
• Processing Of Solid Wastes (AREA)
• Preparation Of Compounds By Using Micro-Organisms (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (11)

Families Citing this family (6)

Family Cites Families (8)

• 2004
  • 2004-05-10 DE DE102004022925A patent/DE102004022925B3/de not_active Expired - Fee Related
• 2005
  • 2005-04-28 EP EP05737675A patent/EP1747066B1/de not_active Expired - Fee Related
  • 2005-04-28 MX MXPA06013013A patent/MXPA06013013A/es active IP Right Grant
  • 2005-04-28 US US11/596,171 patent/US7695634B2/en not_active Expired - Fee Related
  • 2005-04-28 ES ES05737675T patent/ES2300011T3/es active Active
  • 2005-04-28 AU AU2005245069A patent/AU2005245069A1/en not_active Abandoned
  • 2005-04-28 BR BRPI0510767-9A patent/BRPI0510767B1/pt not_active IP Right Cessation
  • 2005-04-28 AT AT05737675T patent/ATE384581T1/de active
  • 2005-04-28 CA CA2569869A patent/CA2569869C/en not_active Expired - Fee Related
  • 2005-04-28 DE DE502005002671T patent/DE502005002671D1/de active Active
  • 2005-04-28 WO PCT/EP2005/004534 patent/WO2005113152A1/de active IP Right Grant
• 2006
  • 2006-09-06 ZA ZA200607460A patent/ZA200607460B/en unknown

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