EP0229835B1 - Procede de separation selective de minerais de cuivre-molybdene - Google Patents

Procede de separation selective de minerais de cuivre-molybdene Download PDF

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Publication number
EP0229835B1
EP0229835B1 EP86905004A EP86905004A EP0229835B1 EP 0229835 B1 EP0229835 B1 EP 0229835B1 EP 86905004 A EP86905004 A EP 86905004A EP 86905004 A EP86905004 A EP 86905004A EP 0229835 B1 EP0229835 B1 EP 0229835B1
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EP
European Patent Office
Prior art keywords
molybdenum
process according
primary
copper
concentrate
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
EP86905004A
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German (de)
English (en)
Other versions
EP0229835A4 (fr
EP0229835A1 (fr
Inventor
Alfredo P. Vargas
Nathaniel Arbiter
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PHLOTEC SERVICES Inc
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PHLOTEC SERVICES Inc
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Publication date
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Priority to AT86905004T priority Critical patent/ATE90592T1/de
Publication of EP0229835A1 publication Critical patent/EP0229835A1/fr
Publication of EP0229835A4 publication Critical patent/EP0229835A4/fr
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    • 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
    • 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 an improved process for the selective separation of the components of a copper molybdenum (Mo-Cu) ore by flotation. More particularly, the present invention relates to a process for such separation conducted at a natural pH (i.e. without addition of alkalies (such as lime) or acids in amounts sufficient to substantially modify the pH) and without the addition of a copper collector in the primary flotation circuit, which leads to the recovery of a primary Mo-Cu concentrate.
  • a natural pH i.e. without addition of alkalies (such as lime) or acids in amounts sufficient to substantially modify the pH
  • alkalies such as lime
  • the ore In conventional flotation systems for copper ores with recoverable molybdenum by-product values, the ore is first crushed and ground with lime usually added to depress pyrite. The ore is then treated in a primary flotation circuit after copper collector and frother have been added. The copper rougher concentrate thus obtained contains most of the copper and a substantial portion of the molybdenum. This rougher copper concentrate is then subjected to several stages of cleaner flotation (usually after a regrind operation) to produce a finished copper concentrate. This concentrate contains substantially all of the molybdenite (MoS2) recovered in the rougher circuit. The copper concentrate is then treated in a series of separation steps designed to separate the molybdenite, a by-product in many copper ores, as a high-purity concentrate.
  • MoS2 molybdenite
  • a major problem with this system is that lime which is invariably used, may depress a portion of the molybdenum, causing a decrease in the obtainable recovery of MoS2 mineral.
  • One object of the present invention is to provide a process for the separation by flotation of the components of a copper ore (with molybdenum as a by-product) by flotation. This process affords a convenient, inexpensive, and efficient method of molybdenum recovery at an acceptable grade.
  • Another object of this invention is to provide a process for such separation, which can be conducted at a natural pH and avoids use of lime and other pH modifiers.
  • Another object of this invention is to provide a process for such separation which avoids use of substantial amounts of depressant for copper minerals.
  • Another object of this invention is to provide a process for such separation that avoids use of a copper collector in the primary flotation circuit.
  • Another object of this invention is to achieve the recovery in the primary flotation circuit of a concentrate substantially enriched in molybdenum which, because of its enhanced molybdenum content, can be further separated into a molybdenum concentrate with less reagents and in a substantially smaller number of cleaning stages, and which affords substantially enhanced recovery of the molybdenum mineral initially contained in the ore.
  • the copper content of this primary flotation circuit after the cleaning stages, can be diverted to the copper circuits. Hence, the overall copper recovery of the system is not jeopardized.
  • a process for the separation of mineral components of an ore containing base metal sulphides, including copper and molybdenum sulphides, and pyrites which process comprises the steps of: grinding the ore to liberate the minerals and to form a pulp of water and the ore; adding to the pulp a hydrocarbon oil molybdenum collector and a frother; floating a primary molybdenum concentrate from the pulp in a primary flotation circuit; directing the primary molybdenum concentrate away for further treatment to produce a final molybdenum concentrate; and treating the non-floating components of the primary flotation circuit for recovery of copper and molybdenum, characterized in that the process further comprises the step of subjecting the pulp to aeration prior to the flotation of the primary molybdenum concentrate, which flotation is carried out at the natural pH of the pulp being essentially determined by the water used and the composition of the ore, without the addition of alkaline or acid pH modifiers.
  • copper ore with associated molybdenum contents from a mine is crushed and ground to the required particle size to form the flotation feed and ore pulp.
  • Preflotation conditioning of the ore may be conducted during or after the wet grinding stage and is completed before the first flotation stage. Preconditioning is marked as 1 in Fig. 1. According to the present invention, apart from the required aeration, the only preconditioning that may be necessary at this stage would require addition of very small amounts of redox agents, such as sodium sulphide hydrogen peroxide, etc. Combined contributions from ore mineralization, degree of surface oxidation and water chemistry (unless modified) can result in varying degrees of copper and iron sulphide mineral recovery along with the molybdenite, in the primary molybdenum rougher stage.
  • redox agents such as sodium sulphide hydrogen peroxide
  • Preflotation conditioning of the ore, by aeration and optionally also with specific reagents, conducted during or after the grinding stage, is necessary to prevent or minimize this recovery of copper and iron sulphides.
  • the additional specific reagents used may be of reducing characteristics, such as hypochlorites or peroxides.
  • the amount of preconditioning required is that just sufficient to prevent or minimize the aforesaid recovery of copper and iron sulphides along with the molybdenite during the primary molybdenite flotation stage.
  • the amount of the optional redox reagent and the extent of aeration is preferably just sufficient to prevent or minimize copper sulphide and pyrite flotation, i.e.
  • Suitable hydrocarbon oils include vapour oil, diesel oil, fuel oil, etc.
  • the hydrocarbon will contain as little wax fraction as possible.
  • the primary flotation circuit produces a rougher molybdenum concentrate containing some copper and a non-float.
  • This concentrate which is substantially enriched in MoS2 (moly)as compared to conventional circuits, is then reground if necessary and directed to cleaner stages which lead to the production of a final molybdenum concentrate.
  • the cleaner stage simplification and cost savings achieved by the present invention are also substantial.
  • the non-float of the primary circuit is directed to a copper flotation circuit.
  • the non-float contains some of the copper and the remaining non-floating minerals.
  • Copper collector is added at 3 in Fig. 1.
  • Whether an oxidation/reduction agent is added or not depends in large measure on the natural oxidation/reduction conditions of the ore and the water used in the flotation process.
  • the copper rougher concentrate is typically directed to regrind and cleaner operations, resulting in production of a final copper concentrate, a final tailings product, and possibly a secondary molybdenum concentrate.
  • This latter concentrate when produced, represents a small proportion of the total moly content of the original ore, because, of the efficiency of the present primary flotation circuit in recovering molybdenite.
  • This secondary molybdenum concentrate may be recycled to the primary molybdenum circuit, or to the molybdenum cleaner circuit, depending on the molybdenum assay.
  • Further separation of the scavenger concentrate may require addition of a small amount of an oxidation/reduction agent sufficient to minimize pyrite flotation.
  • the process of the present invention does not need to employ cyanide.
  • Aeration is advantageously used instead of (or in addition to) a redox additive to control the redox potential of the pulp.
  • Aeration can be used at 1 in the primary flotation circuit, or at 4 in the first scavenger circuit.
  • Advantages of the present process include simplification of the flotation scheme and savings in all reagents, including those resulting from the omission of lime and the minimal -- if any -- addition of a redox agent, and also in frother and collector consumption.
  • Suitable molybdenum-copper ores for practice of the present process include copper-molybdenum sulphide ores which contain chalcopyrite and chalcocite.
  • the present process is particularly suited for ore separation in plants where the water is recycled.
  • the present process can be advantageously introduced in separation plants where a major portion of the water is reclaimed as illustrated in Fig. 2 (Prior Art). This is so because the addition of reagents (including collector and redox reagent, if any) is so minimal that they do not accumulate in the reclaimed water.
  • reagents including collector and redox reagent, if any
  • GPT means U.S. Gallons Per Short Ton of Ore Processed.
  • the electrochemical potential was measured and found to be +40 in the first conditioning stage, during aeration, and in the rougher concentrate flotation step, and +50 in the first scavenger flotation step.
  • the pH was 7.5 during aeration, 7.8 during conditioning, 8.0 during flotation of the primary concentrate and 8.2 during flotation of the secondary concentrate.
  • the results were as follows: Product Weight Analysis Distribution Mo Cu Mo Cu Rougher Conc. 2.7 0.338 17.75 60.75 34.10 1-Scavenger Conc. 3.62 0.032 18.06 9.59 57.89 Primary Conc. 5.79 0.147 17.94 70.35 91.99 Non-float 94.21 0.0038 0.096 29.65 8.01 Calculated Head 100.00 0.121 1.129

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  • Manufacture And Refinement Of Metals (AREA)
  • Steroid Compounds (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Luminescent Compositions (AREA)

Claims (19)

  1. Procédé pour la séparation des composants minéraux d'un minerai contenant des sulfures de métaux communs comprenant des sulfures de cuivre et de molybdène et des pyrites, lequel procédé comprend les étapes consistant à :
       broyer le minerai pour libérer les minéraux et former une pulpe faite d'eau et du minerai ;
       ajouter à la pulpe un collecteur de molybdène, qui est une huile hydrocarbonée, et un moussant ;
       séparer par flottation un concentré primaire de molybdène d'avec la pulpe dans un circuit primaire de flottation ;
       éloigner le concentré primaire de molybdène pour le traiter ultérieurement afin de produire un concentré final de molybdène ; et
       traiter les composants ne flottant pas du circuit primaire de flottation pour récupérer le cuivre et le molybdène,ce procédé étant
       caractérisé de plus en ce qu'il comprend l'étape consistant á soumettre la pulpe à une aération avant la flottation du concentré primaire de molybdène, laquelle flottation est effectuée au pH naturel de la pulpe, qui est essentiellement déterminé par l'eau utilisée et la composition du minerai, sans addition de modificateurs alcaline ou acides du pH.
  2. Procédé selon la revendication 1, dans lequel l'aération est effectuée pendant ou après le broyage du minerai.
  3. Procédé selon la revendication 1 ou 2, dans lequel l'aération est effectuée avant ou après l'addition du collecteur de molybdène et du moussant.
  4. Procédé selon la revendication 1, 2 ou 3, qui comprend de plus l'étape d'addition d'un agent oxydant ou réducteur (réactif redox) à la pulpe.
  5. Procédé selon la revendication 4, dans lequel l'addition est effectuée pendant ou après le broyage du minerai.
  6. Procédé selon la revendication 4 ou 5, dans lequel l'addition du réactif redox est effectuée avant ou après l'addition du collecteur de molybdène et du moussant.
  7. Procédé selon la revendication 1, 2 ou 3, dans lequel la flottation du concentré primaire de molybdène est effectuée au potentiel redox naturel de la pulpe.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel le collecteur de molybdène et le moussant sont ajoutés pendant le broyage.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel le traitement ultérieur du concentré primaire de molybdène est effectué dans un circuit de séparation d'enrichissement.
  10. Procédé selon l'une quelconque des revendications précédentes, qui comprend de plus l'addition d'un agent oxydant ou réducteur au concentré primaire de molybdène pendant son traitement ultérieur, en une quantité suffisante pour au moins réduire au minimum la flottation des sulfures de cuivre et de fer.
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel le traitement des composants non flottants du circuit primaire de flottation consiste à diriger les composants non flottants du circuit primaire de flottation dans un circuit secondaire de flottation pour récupérer du cuivre et du molybdène additionnel.
  12. Procédé selon la revendication 11, dans lequel le traitement des composants non flottants du circuit primaire de flottation consiste à faire flotter un concentré contenant du cuivre et à en obtenir du molybdène additionnel et un concentré final de cuivre.
  13. Procédé selon l'une quelconque des revendications précédentes, qui comprend de plus l'addition d'un agent oxydant ou réducteur pendant le traitement du composant non flottant.
  14. Procédé selon l'une quelconque des revendications précédentes, qui comprend de plus l'addition d'un collecteur pendant le traitement des composants non flottants du circuit primaire de flottation.
  15. Procédé selon la revendication 14, dans lequel le collecteur est un collecteur de cuivre.
  16. Procédé selon l'une quelconque des revendications précédentes, dans lequel le traitement des composants non flottants du circuit primaire de flottation consiste à soumettre ces composants à une aération.
  17. Procédé selon l'une quelconque des revendications précédentes, dans lequel la traitement des composants non flottants du circuit primaire de flottation est effectué au pH naturel des composants non flottants, qui est essentiellement déterminé par l'eau utilisée et la composition des composants non flottants, sans addition de modificateurs alcaline ou acides du pH.
  18. Procédé selon l'une quelconque des revendications 4 à 6, 9 ou 13, dans lequel l'agent oxydant ou réducteur est l'ion sulfure.
  19. Procédé selon la revendication 18, dans lequel l'agent oxydant ou réducteur est ajouté en une proportion comprise entre 0 et 5 g/t de minerai.
EP86905004A 1985-07-09 1986-07-09 Procede de separation selective de minerais de cuivre-molybdene Expired - Lifetime EP0229835B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86905004T ATE90592T1 (de) 1985-07-09 1986-07-09 Verfahren zur selektiven trennung von kupfermolybdenerz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75318185A 1985-07-09 1985-07-09
US753181 1985-07-09

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EP0229835A1 EP0229835A1 (fr) 1987-07-29
EP0229835A4 EP0229835A4 (fr) 1989-12-12
EP0229835B1 true EP0229835B1 (fr) 1993-06-16

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EP (1) EP0229835B1 (fr)
JP (1) JPS63500577A (fr)
AT (1) ATE90592T1 (fr)
AU (2) AU6191386A (fr)
BR (1) BR8606758A (fr)
DE (1) DE3688591T2 (fr)
FI (1) FI80835C (fr)
WO (1) WO1987000088A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101927213A (zh) * 2009-06-26 2010-12-29 西北有色金属研究院 一种辉钼矿与方铅矿的浮选分离方法
CN102228870A (zh) * 2011-05-26 2011-11-02 山东梁邹矿业集团有限公司 一种通过联合用药提高铜钼分离浮选指标的方法
CN102302981A (zh) * 2011-09-21 2012-01-04 紫金矿业集团股份有限公司 用于铜钼混合精矿分离的选矿药剂及方法
CN102671769A (zh) * 2012-05-14 2012-09-19 长沙矿冶研究院有限责任公司 从易浮脉石类难选钼矿中浮选回收钼的选矿方法
CN104128263A (zh) * 2014-07-11 2014-11-05 北京矿冶研究总院 一种滑石和蛇纹石的抑制剂及应用该抑制剂的选矿方法
CN105665146A (zh) * 2016-03-04 2016-06-15 中南大学 一种提高金红石浮选回收率的方法
CN106238214A (zh) * 2016-08-10 2016-12-21 金堆城钼业股份有限公司 一种钼精矿脱碳工艺
CN107790291A (zh) * 2017-09-30 2018-03-13 紫金矿业集团股份有限公司 从铜尾矿中综合回收金硫的浮选工艺

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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US5068028A (en) * 1990-01-21 1991-11-26 University Of Utah Molybdenite flotation from copper sulfide/molybdenite containing materials by ozone conditioning
US5110455A (en) * 1990-12-13 1992-05-05 Cyprus Minerals Company Method for achieving enhanced copper flotation concentrate grade by oxidation and flotation
US8413816B2 (en) 2010-02-16 2013-04-09 Nalco Company Sulfide flotation aid
CN102259050A (zh) * 2010-08-23 2011-11-30 鞍钢集团矿业公司 反浮选作业中矿处理新工艺
WO2013110420A1 (fr) 2012-01-27 2013-08-01 Evonik Degussa Gmbh Enrichissement de minerais de sulfure métallique par flottation par moussage assistée par un oxydant
CN103386356A (zh) * 2012-05-09 2013-11-13 中国瑞林工程技术有限公司 硫化铜矿石的浮选方法
CN102773152B (zh) * 2012-07-13 2013-09-25 四川领航石墨制品有限公司 一种细鳞片-隐晶质混合型石墨选矿工艺
CN103128004B (zh) * 2013-01-07 2015-04-29 湖南有色金属研究院 一种硫化铜钼混合精矿浮选分离的方法
US9839917B2 (en) 2013-07-19 2017-12-12 Evonik Degussa Gmbh Method for recovering a copper sulfide concentrate from an ore containing an iron sulfide
CN106583026B (zh) * 2016-10-31 2019-11-26 江苏旌凯中科超导高技术有限公司 一种浮磁联合铜钼分选-分离方法
CN106378262A (zh) * 2016-12-07 2017-02-08 广西大学 一种从辉钼矿尾矿中回收钼钙矿的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2316743A (en) * 1939-11-09 1943-04-13 American Cyanamid Co Flotation of molybdenite
US2559104A (en) * 1948-03-23 1951-07-03 Phelps Dodge Corp Flotation recovery of molybdenite
US3426896A (en) * 1965-08-20 1969-02-11 Armour Ind Chem Co Flotation of bulk concentrates of molybdenum and copper sulfide minerals and separation thereof
US3811569A (en) * 1971-06-07 1974-05-21 Fmc Corp Flotation recovery of molybdenite
US3788467A (en) * 1972-04-27 1974-01-29 American Cyanamid Co Flotation process for recovering molybdenum
US4268380A (en) * 1978-08-15 1981-05-19 Pennwalt Corporation Froth flotation process
US4231859A (en) * 1979-11-27 1980-11-04 The United States Of America As Represented By The Secretary Of The Interior Molybdenite flotation
US4515688A (en) * 1982-08-20 1985-05-07 South American Placers, Inc. Process for the selective separation of base metal sulfides and oxides contained in an ore
US4587013A (en) * 1984-11-28 1986-05-06 American Cyanamid Company Monothiophosphinates as acid, neutral, or mildly alkaline circuit sulfide collectors and process for using same

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101927213A (zh) * 2009-06-26 2010-12-29 西北有色金属研究院 一种辉钼矿与方铅矿的浮选分离方法
CN102228870B (zh) * 2011-05-26 2013-09-04 山东梁邹矿业集团有限公司 一种通过联合用药提高铜钼分离浮选指标的方法
CN102228870A (zh) * 2011-05-26 2011-11-02 山东梁邹矿业集团有限公司 一种通过联合用药提高铜钼分离浮选指标的方法
CN102302981A (zh) * 2011-09-21 2012-01-04 紫金矿业集团股份有限公司 用于铜钼混合精矿分离的选矿药剂及方法
CN102302981B (zh) * 2011-09-21 2013-06-12 紫金矿业集团股份有限公司 用于铜钼混合精矿分离的选矿药剂及方法
CN102671769B (zh) * 2012-05-14 2014-02-26 长沙矿冶研究院有限责任公司 从易浮脉石类难选钼矿中浮选回收钼的选矿方法
CN102671769A (zh) * 2012-05-14 2012-09-19 长沙矿冶研究院有限责任公司 从易浮脉石类难选钼矿中浮选回收钼的选矿方法
CN104128263A (zh) * 2014-07-11 2014-11-05 北京矿冶研究总院 一种滑石和蛇纹石的抑制剂及应用该抑制剂的选矿方法
CN105665146A (zh) * 2016-03-04 2016-06-15 中南大学 一种提高金红石浮选回收率的方法
CN105665146B (zh) * 2016-03-04 2018-06-01 中南大学 一种提高金红石浮选回收率的方法
CN106238214A (zh) * 2016-08-10 2016-12-21 金堆城钼业股份有限公司 一种钼精矿脱碳工艺
CN106238214B (zh) * 2016-08-10 2018-05-15 金堆城钼业股份有限公司 一种钼精矿脱碳工艺
CN107790291A (zh) * 2017-09-30 2018-03-13 紫金矿业集团股份有限公司 从铜尾矿中综合回收金硫的浮选工艺
CN107790291B (zh) * 2017-09-30 2019-08-27 紫金矿业集团股份有限公司 从铜尾矿中综合回收金硫的浮选工艺

Also Published As

Publication number Publication date
JPS63500577A (ja) 1988-03-03
DE3688591D1 (de) 1993-07-22
EP0229835A4 (fr) 1989-12-12
AU5684090A (en) 1990-09-27
AU629646B2 (en) 1992-10-08
DE3688591T2 (de) 1993-09-23
FI870999A0 (fi) 1987-03-06
BR8606758A (pt) 1987-10-13
ATE90592T1 (de) 1993-07-15
EP0229835A1 (fr) 1987-07-29
FI870999A (fi) 1987-03-06
WO1987000088A1 (fr) 1987-01-15
FI80835C (fi) 1990-08-10
FI80835B (fi) 1990-04-30
AU6191386A (en) 1987-01-30

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