EP0597522B1 - Procédé pour la flottation sélective d'un minerai sulfuré contenant du cuivre, du plomb et du zine - Google Patents

Procédé pour la flottation sélective d'un minerai sulfuré contenant du cuivre, du plomb et du zine Download PDF

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Publication number
EP0597522B1
EP0597522B1 EP93203068A EP93203068A EP0597522B1 EP 0597522 B1 EP0597522 B1 EP 0597522B1 EP 93203068 A EP93203068 A EP 93203068A EP 93203068 A EP93203068 A EP 93203068A EP 0597522 B1 EP0597522 B1 EP 0597522B1
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EP
European Patent Office
Prior art keywords
flotation
redox potential
copper
ore
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.)
Expired - Lifetime
Application number
EP93203068A
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German (de)
English (en)
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EP0597522A1 (fr
Inventor
Ali-Naghi Dr. Beyzavi
Leo Kitschen
Friedrich Rosenstock
Horst Dittmann
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GEA Group AG
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Metallgesellschaft AG
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Publication of EP0597522A1 publication Critical patent/EP0597522A1/fr
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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
    • B03D1/02—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
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B03D1/06—Froth-flotation processes differential

Definitions

  • the present invention relates to a process for the selective flotation of a sulfidic copper-lead-zinc ore, wherein the raw ore is ground and slurried with water, the suspension formed is aerated to set a certain redox potential, then successively with SO2, with Ca (OH) 2 and is conditioned with collectors and foamers and then the Cu flotation takes place.
  • the ore was finely ground, then slurried in water, then the suspension was filtered and the filter cake was washed intensively with fresh water to remove the so-called toxic "constituents", e.g. B. S2 ⁇ , S2O32 ⁇ , S4O62 ⁇ , SO32 ⁇ and SO42 ⁇ to remove.
  • the solids were reslurried and the slurry was first aerated to set a certain redox potential, then conditioned with SO2, then conditioned with CaO and finally with collectors and foamers.
  • the redox potential and the Oxygen content and the pH values measured.
  • the redox potential selected for the Cu flotation was adjusted by the amount of oxygen supplied in the aeration before conditioning with SO2.
  • the invention has for its object to provide an economical method for flotation of a sulfidic copper-lead-zinc ore, wherein the maximum yield of copper with the highest selectivity for the copper and with minimal losses of lead and zinc is obtained in the copper flotation.
  • the optimal redox potential is set during aeration before SO2 conditioning, this value increases further during flotation.
  • redox potentials are achieved in the Cu flotation, in which other metal sulfides, such as PbS (galena) and ZnS (zinc blende) are activated and discharged with the foam of the Cu flotation, which reduces the selectivity of the copper in the Cu flotation.
  • Cu flotation is to be understood as the flotation stage in which the copper is applied.
  • the non-selectivity also results in losses of Pb or / and Zn.
  • the redox potential is to be 70 to 90% of the redox potential required for selective copper flotation, 70 to 90% of the amount of oxygen required to achieve the optimal redox potential is introduced during the aeration.
  • SO2 it has proven to be very advantageous to add 1000 g of SO2 per ton of solid to the slurry.
  • a preferred embodiment of the invention is that the optimum redox potential desired for Cu flotation is 60 to 75 mV. It has advantageously been found that for copper-lead-zinc ores, the 0.6 to 1.4% by weight of Cu, 0.6 to 1.4% by weight of Pb and 2.0 to 3.0% by weight Contain Zn, with which the highest yield of copper and the highest selectivity for copper in the Cu flotation were achieved with the Cu flotation.
  • a preferred embodiment of the invention is that the optimum redox potential desired for Cu flotation is from 155 to 170 mV. It has been found to be advantageous for copper-lead-zinc ores containing 4 to 6% by weight of Cu, 0.1 to 0.5% by weight of Pb and 11.0 to 12.5% by weight of Zn of copper flotation under these conditions, the highest copper yield and the highest selectivity for copper were achieved in the copper flotation.
  • a preferred embodiment of the invention is that the optimum redox potential desired for Cu flotation is from 325 to 340 mV. It has advantageously been found that copper-lead-zinc ores containing 0.4 to 1.5% by weight of Cu, 0.01 to 0.1% by weight of Pb and 0.02 to 0.15% by weight of Zn contain, with the copper flotation under these conditions the highest yield of copper and the highest selectivity for copper in the copper flotation were achieved.
  • a preferred embodiment of the invention is that when the suspension is aerated before the Cu flotation, a redox potential of 75 to 85% of the optimum redox potential desired for the Cu flotation is set.
  • a preferred embodiment of the invention is that the Cu flotation takes place at a pH of 9.0 to 9.7.
  • a particularly preferred embodiment of the invention is that the Cu flotation takes place at a pH of 9.3 to 9.5.
  • a preferred embodiment of the invention is that the suspension resulting from the Cu flotation is adjusted to a pH of 9.3 to 12 with Ca (OH) 2, is used in a Pb flotation with collectors and foamers and Pb with the foam is removed. It has advantageously been found that the application of Pb is particularly high in this pH range and the selectivity of Pb over Zn is very favorable.
  • a particularly preferred embodiment of the invention is that the optimum redox potential of 80 to 360 mV desired for the Pb flotation is set by the ventilation in the Pb flotation. It has advantageously been found that in the Pb flotation, a very particularly high yield of Pb and a very particularly favorable selectivity towards Zn are achieved in this area for the redox potential.
  • a preferred embodiment of the invention is that the resulting as the Pb flotation suspension is conditioned with CuSO4 and then adjusted to a pH of 11.5 to 12.5 with Ca (OH) 2, with collectors and foamers in Zn flotation is used and Zn is removed with the foam. It has proven to be advantageous to set the course of the Pb flotation in this pH range, in which a particularly large amount of Zn present could be observed.
  • a particularly preferred embodiment of the invention is that the optimum redox potential of 110 to 450 mV desired for the Zn flotation is set by the ventilation during the Zn flotation. It has advantageously been found that the application of Zn in this area is particularly high for the redox potential.
  • Comparative Example 2 Ore type E 1 6) Staging 3) Salary 4) Spread 5) mV % Cu Pb Zn Cu Pb Zn I. 68 5.7 12.1 0.80 1.50 80.2 5.4 3.6 2) the comparative example is taken from the prior art publication by AN Beysavi and LP Kitschen. 3) In the comparative example, discharge means the percentage of the ore used that was discharged with the flotation foam. In Examples 1 to 3, discharge means the balanced amount of solids discharged. 4) In the comparative example, content means the percentage distribution in the discharge. In Examples 1 to 3, content means the proportions of Cu, Pb and Zn in% by weight in the discharge.
  • the comparative example shows what percentage of the amounts of Cu, Pb and Zn originally present in the ore were discharged.
  • yield reflects the weight percentages of Cu, Pb and Zn, based on the amounts of Cu, Pb and Zn originally present in the ore.
  • the appropriate amount of lime milk (suspension of 10 g CaO and 90 ml H2O) was then added to adjust the desired pH to 9.5. Lime milk lasted 2 minutes. A mixture of 40 mg Na isopropyl xanthate and 40 mg Hostaflot (R) was then added to the flotation cell as a collector in 1923. The action time of the collectors was 5 minutes.
  • discharge means the percentage of the ore used that was discharged with the flotation foam.
  • discharge means the balanced amount of solids discharged.
  • content means the percentage distribution in the discharge.
  • content means the proportions of Cu, Pb and Zn in% by weight in the discharge.
  • the comparative example shows what percentage of the amounts of Cu, Pb and Zn originally present in the ore were discharged.
  • yield reflects the weight percentages of Cu, Pb and Zn, based on the amounts of Cu, Pb and Zn originally present in the ore.
  • Example 2 carried out as Example 1, with the difference that before the SO2 addition as much air was introduced into the flotation cell until a redox potential of 142 mV was set and the optimal redox potential of 164 mV was measured at the end of the flotation.
  • discharge means the percentage of the ore used that was discharged with the flotation foam.
  • discharge means the balanced amount of solids discharged.
  • content means the percentage distribution in the discharge.
  • Example 1 to 3 content means the proportions of Cu, Pb and Zn in% by weight in the discharge.
  • the comparative example shows what percentage of the amounts of Cu, Pb and Zn originally present in the ore were discharged.
  • yield reflects the weight percentages of Cu, Pb and Zn, based on the amounts of Cu, Pb and Zn originally present in the ore.
  • Example 2 carried out as Example 1, with the difference that before the SO2 addition as much air was introduced into the flotation cell until a redox potential of 262 mV was set and the optimal redox potential of 327 mV was measured at the end of the flotation.
  • discharge means the percentage of the ore used that was discharged with the flotation foam.
  • discharge means the balanced amount of solids discharged.
  • content means the percentage distribution in the discharge.
  • Example 1 to 3 content means the proportions of Cu, Pb and Zn in% by weight in the discharge.
  • the comparative example shows what percentage of the amounts of Cu, Pb and Zn originally present in the ore were discharged.
  • yield reflects the weight percentages of Cu, Pb and Zn, based on the amounts of Cu, Pb and Zn originally present in the ore.

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  • Manufacture And Refinement Of Metals (AREA)
  • Treating Waste Gases (AREA)

Claims (11)

  1. Procédé de flottation sélective d'un minerai cuivre-plomb-zinc sulfuré, dans lequel le minerai brut est broyé et mis en suspension avec de l'eau, la suspension formée est aérée pour l'ajustement d'un potentiel rédox déterminé, puis elle est conditionnée successivement avec SO₂, avec Ca(OH)₂ ainsi qu'avec des collecteurs et des moussants, après quoi on effectue la flottation de Cu, caractérisé par les stades de procédé suivants :
    a) aération de la suspension avant la flottation de Cu, dans laquelle, en faisant passer une quantité appropriée d'oxygène, on met à un potentiel rédox représentant de 70 à 90 % du potentiel rédox optimal souhaité pour la flottation de Cu,
    b) conditionnement de la suspension de (a) avec SO₂, Ca(OH)₂, ainsi qu'avec au moins un collecteur et un moussant et
    c) aération de la suspension conditionnée pour la flottation de Cu, dans laquelle on met au potentiel rédox optimal souhaité de 60 à 340 mV, on effectue la flottation de Cu à un pH de 8,5 à 10,5 et on élimine Cu de la flottation avec la mousse.
  2. Procédé selon la revendication 1, caractérisé en ce que le potentiel rédox optimal souhaité pour la flottation de Cu est de 60 à 75 mV.
  3. Procédé selon la revendication 1, caractérisé en ce que le potentiel rédox optimal souhaité pour la flottation de Cu est de 155 à 170 mV.
  4. Procédé selon la revendication 1, caractérisé en ce que le potentiel rédox optimal souhaité pour la flottation de Cu est de 325 à 340 mV.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que lors de l'aération de la suspension avant la flottation de Cu, on met à un potentiel rédox représentant de 75 à 85 % du potentiel rédox optimal souhaité pour la flottation de Cu.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la flottation de Cu s'effectue à un pH de 9,0 à 9,7.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la flottation de Cu s'effectue à un pH de 9,3 à 9,5.
  8. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la suspension se formant au cours de la flottation de Cu est ajustée avec Ca(OH)₂ à un pH de 9,3 à 12, en ce que l'on utilise des collecteur et des moussants dans une flottation de Pb et en ce que Pb est éliminé avec la mousse.
  9. Procédé selon la revendication 8, caractérisé en ce que l'on met au potentiel rédox souhaité pour la flottation de Pb de 80 à 360 mV, par l'aération lors de la flottation de Pb.
  10. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la suspension se formant lors de la flottation de Pb est conditionnée avec CuSO₄, puis est ajustée avec Ca(OH)₂ à un pH de 11,5 à 12,5, est utilisée avec des collecteurs et des moussants dans une flottation de Zn et Zn est élimine avec la mousse.
  11. Procédé selon la revendication 10, caractérisé en ce que l'on met au potentiel rédox souhaité pour la flottation de Zn de 110 à 450 mV par l'aération lors de la flottation de Zn.
EP93203068A 1992-11-12 1993-11-02 Procédé pour la flottation sélective d'un minerai sulfuré contenant du cuivre, du plomb et du zine Expired - Lifetime EP0597522B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4238244A DE4238244C2 (de) 1992-11-12 1992-11-12 Verfahren zur selektiven Flotation eines sulfidischen Kupfer-Blei-Zinkerzes
DE4238244 1992-11-12

Publications (2)

Publication Number Publication Date
EP0597522A1 EP0597522A1 (fr) 1994-05-18
EP0597522B1 true EP0597522B1 (fr) 1996-04-17

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Country Status (9)

Country Link
US (1) US5439115A (fr)
EP (1) EP0597522B1 (fr)
CN (1) CN1087559A (fr)
AU (1) AU661618B2 (fr)
CA (1) CA2107275A1 (fr)
DE (2) DE4238244C2 (fr)
ES (1) ES2086872T3 (fr)
TR (1) TR28263A (fr)
ZA (1) ZA938467B (fr)

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CN106269290B (zh) * 2016-10-26 2018-07-27 中国科学院过程工程研究所 从高品位硫精矿中除铜铅锌的浮选方法
CN106881201B (zh) * 2017-01-20 2019-02-22 内蒙古科技大学 一种基于表面氧化-选择性沉淀原理的铜铅浮选分离方法
CN110465411B (zh) * 2019-09-05 2021-06-11 紫金矿业集团股份有限公司 铜铅硫化矿物的优先浮选方法
CN111790527A (zh) * 2020-07-17 2020-10-20 厦门紫金矿冶技术有限公司 一种高硫铜锌矿的低碱分离方法
CN112916196B (zh) * 2020-12-29 2022-08-23 内蒙古黄岗矿业有限责任公司 一种从低铜高锌硫化矿中获取独立铜、锌精矿的选矿工艺
CN115155820A (zh) * 2022-07-11 2022-10-11 中南大学 一种强化锌-硫分离浮选的方法

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Also Published As

Publication number Publication date
DE4238244C2 (de) 1994-09-08
ZA938467B (en) 1995-05-12
AU5058893A (en) 1994-05-26
EP0597522A1 (fr) 1994-05-18
ES2086872T3 (es) 1996-07-01
TR28263A (tr) 1996-04-25
CN1087559A (zh) 1994-06-08
AU661618B2 (en) 1995-07-27
CA2107275A1 (fr) 1994-05-13
DE59302259D1 (de) 1996-05-23
US5439115A (en) 1995-08-08
DE4238244A1 (de) 1994-05-19

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