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US20020083795A1 - Purification of zinc bearing material solutions containing manganese - Google Patents

Purification of zinc bearing material solutions containing manganese Download PDF

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Publication number
US20020083795A1
US20020083795A1 US09/977,917 US97791701A US2002083795A1 US 20020083795 A1 US20020083795 A1 US 20020083795A1 US 97791701 A US97791701 A US 97791701A US 2002083795 A1 US2002083795 A1 US 2002083795A1
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US
United States
Prior art keywords
manganese
zinc
solution
constituent
subjecting
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.)
Abandoned
Application number
US09/977,917
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English (en)
Inventor
Cesar Ferron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lakefield Research Ltd
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Individual
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Filing date
Publication date
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Assigned to LAKEFIELD RESEARCH LIMITED reassignment LAKEFIELD RESEARCH LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FERRON, CESAR J.
Publication of US20020083795A1 publication Critical patent/US20020083795A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G45/00—Compounds of manganese
    • C01G45/10—Sulfates
    • 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
    • C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
    • 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 present invention relates to the purification of zinc-bearing materials, more particularly but not necessarily exclusively to zinc-bearing aqueous solutions.
  • Zn ores for example sphalerite
  • Mn manganese
  • MnO 2 Although some relatively small amounts of Mn are generally acceptable in a Zn elecolyte, for example, excessive quantities can create problems, since the Mn is oxidized at the anode in the form of MnO 2, some of which falls at the bottom of the cell and must be periodically removed. Greater concentration of MnO 2 can lead to significant reductions in electrolytic efficiency.
  • Another solution proposed by the prior art is to oxidize Mn 2+ to Mn 4+ so that MnO 2 can be removed by precipitation at a pH where Zn 2+ is soluble.
  • Air and oxygen gas are typically used as oxidants in this case but they are generally uneconomically slow.
  • Peroxide or stronger oxidants, such as Caro's acid or ozone, are in many cases too expensive.
  • U.S. Pat. 2,816,819 to Wallis et al. discloses a system which uses SO 2 /Air to precipitate iron from a cobalt- or a nickel-bearing solution.
  • Canadian Patent 935,650 discloses a technique by which a mixture of SO 2 /Air is used to precipitate a number of impurities from a cobalt or a nickel solution.
  • neither reference is concerned with techniques for reducing impurities from Zn-bearing materials.
  • the invention involves a process for removing at least a portion of a manganese constituent from a zinc-bearing material, comprising the step of Subjecting the material to mixture of SO 2 and oxygen, at conditions sufficient to oxidize the manganese constituent,
  • the material is maintained at a pH sufficient to precipitate manganese while minimizing precipitation of the zinc constituent.
  • the present invention provides a process for removing at least a portion of a manganese constituent from a zinc-bearing material, comprising the step of subjecting said material to a first oxidation mixture of SO 2 and oxygen, at conditions sufficient to oxidize said manganese constituent, wherein the material is maintained at a par between 3 and 4 to form a manganese precipitate and no zinc precipitate.
  • the preset invention provides a process for removing a manganese impurity from a zinc-bearing solution, comprising the steps of:
  • the preset invention provides an aqueous zinc-bearing solution, comprising the steps of:
  • the preset invention provides a process for removing a manganese impurity from an aqueous zinc-bearing solution, comprising the steps of
  • FIG. 1 is a plot of precipitation for Mn and Zn according to pH
  • FIG. 2 is a plot of precipitation using SO 2 /O 2 mixture as all oxidant
  • the invention involves a process for removing at least a portion of a manganese constituent from a zinc-bearing material, comprising the step of subjecting the material to mixture of SO 2 and oxygen at conditions sufficient to oxidize the manganese constituent.
  • the material is maintained at a pH sufficient to precipitate manganese while minimizing precipitation of the zinc constituent
  • the process is carried out at a pH between about 3 and about 5 more preferably between 3 and 4. Still more preferably, the pH is 3.
  • the pH is higher than 5, for example up to 7, at least some residual Zn may be precipitated with the Mn.
  • the pH limit of 4 is significant because, as the following examples illustrate, residual Zn has been found to appear in the precipitate at a pH value above 4 while there appears to be no Zn co-precipitate at pH values below 4. Therefore, it may be desirable, in some circumstances, to maintain tie reaction at the lower end of the pH rage, that is in the vicinity of pH 3 in order to minimize the likelihood of a Zn co-precipitate. This route may also be enhanced by maintaining a distribution of nucleation sites in the reaction, such as MnO 2 crystals.
  • the oxygen may be in the form of O 2 or air or a mixture of both.
  • the process occurs at a temperature from about 40 to about 80° C., more preferably at a temperature ranging from 50 to 80° C., still more preferably at a temperature ranging from 58 to 78° C.
  • the process may be carried out al about 70° C. or, alternatively, at about 60° C.
  • the SO 2 is at a concentration from about 0.5% to 10%, with the balance O 2 gas, more preferably from 1 to 8%, still more preferably at a concentration from 2 to 3%.
  • the SO 2 is preferably at a concentration ranging from about 0.1% to 2%, with the balance being Air, more preferably from about 0.2 to 1.4%, still more preferably from about 0.4 to 0.6%.
  • the concentration may be about 0.5%.
  • the zinc material may be in a number of forms including an aqueous solution, such as a leach solution or an electrolyte solution.
  • the present process is beneficial in that it makes use of a relatively inexpensive and plentiful oxidant a gas mixture of O 2 /SO 2, or alternatively Air/ SO 2, or still alternatively 100% pure Air can be used together with equivalent amounts of SO 2, preferably added as SO 2 in a gaseous or liquid form, or added as a constituent in a solution containing for example, sodium metabisulphite, ammonium metabisulphite, potassium metabisulphite or other suitable forms of metabisulphite.
  • a solution containing 5 g/L Mn as MnSO 4 was sparged with a mixture of SO 2 , and O 2 at different pH levels. The amount of Mn removed at each pH is shown in FIG. 2.
  • the Mn is removed from solution at pH levels ranging from about 3 to 5. However, in the region from about 3 to 4, the Mn is removed from solution while the Zn is soluble and therefore remains in solution.
  • a solution containing 18 g/L Mn as MnSO 4 was sparged at 60° C. and at a pH of 6.5 with SO 2 /O 2 mixtures containing 2% (v/v) SO 2 . After one hour, 25% of the manganese had precipitated. After 2 hours. 57% of the Mn had precipitated and after 4 hours, 99.5% of the Mn had precipitated.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Removal Of Specific Substances (AREA)
US09/977,917 1999-04-09 2001-10-09 Purification of zinc bearing material solutions containing manganese Abandoned US20020083795A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002268496A CA2268496A1 (fr) 1999-04-09 1999-04-09 Purification de matieres zinciques
CA2,262,496 1999-04-09
CAPCT/CA00/00352 2000-04-05
PCT/CA2000/000352 WO2000061826A1 (fr) 1999-04-09 2000-04-05 Purification de solutions de materiaux a teneur en zinc contenant du manganese

Publications (1)

Publication Number Publication Date
US20020083795A1 true US20020083795A1 (en) 2002-07-04

Family

ID=4163451

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/977,917 Abandoned US20020083795A1 (en) 1999-04-09 2001-10-09 Purification of zinc bearing material solutions containing manganese

Country Status (5)

Country Link
US (1) US20020083795A1 (fr)
AU (1) AU3547900A (fr)
CA (1) CA2268496A1 (fr)
WO (1) WO2000061826A1 (fr)
ZA (1) ZA200109183B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6391270B1 (en) * 1999-12-23 2002-05-21 Noranda Inc. Method for removing manganese from acidic sulfate solutions
US7465334B2 (en) * 2001-09-13 2008-12-16 Intec Ltd. Zinc recovery process

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816819A (en) * 1949-09-07 1957-12-17 Int Nickel Co Process of removing ferrous sulfate from sulfate solutions containing nickel and/or cobalt
CA935650A (en) * 1968-12-03 1973-10-23 Kniprath Elmar Redox precipitation of non-ferrous heavy metals from aqueous solutions
US4067789A (en) * 1975-07-09 1978-01-10 Newmont Exploration Limited Process for manganese removal from zinc metal bearing solutions
CA1141172A (fr) * 1978-12-20 1983-02-15 Gerald L. Bolton Separation des ions de manganese en presence dans le zinc et dans les solutions a teneur de manganese
SU947055A1 (ru) * 1981-02-06 1982-07-30 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Горнометаллургический Институт Цветных Металлов Способ очистки цинкового электролита от примесей
US4439288A (en) * 1983-07-11 1984-03-27 Exxon Research & Engineering Company Process for reducing Zn consumption in zinc electrolyte purification
SU1411348A1 (ru) * 1986-10-08 1988-07-23 Северо-Кавказский горно-металлургический институт Способ очистки цинковых растворов от железа (П) и марганца (П)

Also Published As

Publication number Publication date
ZA200109183B (en) 2002-07-31
CA2268496A1 (fr) 2000-10-09
WO2000061826A1 (fr) 2000-10-19
AU3547900A (en) 2000-11-14

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AS Assignment

Owner name: LAKEFIELD RESEARCH LIMITED, CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FERRON, CESAR J.;REEL/FRAME:012887/0652

Effective date: 20020110

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION