EP0456528A1 - Verfahren zum Raffinieren von Blei, insbesondere zum Entfernen von Kupfer - Google Patents

Verfahren zum Raffinieren von Blei, insbesondere zum Entfernen von Kupfer Download PDF

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Publication number
EP0456528A1
EP0456528A1 EP91400697A EP91400697A EP0456528A1 EP 0456528 A1 EP0456528 A1 EP 0456528A1 EP 91400697 A EP91400697 A EP 91400697A EP 91400697 A EP91400697 A EP 91400697A EP 0456528 A1 EP0456528 A1 EP 0456528A1
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EP
European Patent Office
Prior art keywords
lead
impurities
phase
temperature
approximately
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.)
Withdrawn
Application number
EP91400697A
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English (en)
French (fr)
Inventor
Etienne Lepain
Gérald Sanchez
Pierre Chabry
Richard Kollar
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.)
Metaleurop SA
Original Assignee
Metaleurop SA
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 Metaleurop SA filed Critical Metaleurop SA
Publication of EP0456528A1 publication Critical patent/EP0456528A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C22B13/00—Obtaining lead
    • C22B13/06—Refining

Definitions

  • the present invention relates generally to the refining of lead.
  • Patent application FR-A-2,559,161 in the name of the Mining and Metallurgical Company of Penarroya teaches a process for the purification, in particular of copper plating, of lead from a lead oven.
  • the present invention relates to a new process for de-coppering lead of the type produced by the pyrometallurgical process of mixed lead-zinc ores.
  • Such a well-known treatment process commonly called the “Imperial Smelting” process, produces liquid working lead at a temperature of the order of 1200 ° C., which is essentially characterized by the fact that it contains very little sulfur and fairly large amounts of copper, antimony tin and arsenic.
  • refining, in particular de-plating, of this type of lead is carried out during the cooling of the liquid working lead, during which there is a separation by difference in density of the products rich in copper and other impurities compared to lead, the former forming supernatant dross which is recovered by skimming or the like.
  • the lead is vigorously stirred using an agitator and the dross is skimmed as it forms.
  • the Applicant has discovered that it is possible to considerably reduce the duration of the copper-plating treatment, and this substantially without in any way compromising the effectiveness of the demixing of copper and lead.
  • the present invention relates to a process for refining lead from molten work, of the type produced by the pyrometallurgical treatment of a mixed lead / zinc ore, and containing as impurities copper and at least one of the elements chosen from the group comprising tin, antimony and arsenic, characterized in that it comprises the stages consisting in: use a working lead in which the ratio between the quantity of copper and the cumulative quantities of tin, antimony and arsenic, is known and between approximately 10 and 1; rapidly cool the lead in the work to a determined temperature between about 900 ° C and 600 ° C and chosen so as to cause a demixing between a phase enriched in lead and a phase enriched in impurities, during which said abovementioned ratio remains essentially constant in the phase enriched in impurities, maintain the working lead at this temperature or in the vicinity of it for a period of between approximately 3 to 60 minutes and chosen so as to complete the demixing and obtain a phase of lead free of a substantial part of
  • said ratio is equal to approximately 3, the demixing temperature is of the order of 800 ° C. and the duration of maintenance at this temperature or in its vicinity is of the order of 5 to 10 minutes.
  • rapid cooling of the working lead is carried out from its temperature at the outlet of the pyrometallurgical treatment to approximately 800 ° C., then very slow cooling from approximately 800 ° C. to approximately 700 ° C.
  • the above process is preferably completed by a step of quenching at a temperature of the order of 400 ° C. and drying of the supernatant phase rich in impurities for the purpose of eliminating it.
  • the present invention is based on the discovery that, by working at high temperature, typically between 900 and 600 ° C, and chosen according to the ratio that exists in the lead to be refined between the amount of copper and the cumulative amounts of tin, arsenic and antimony, a demixing can be obtained by stirring considerably accelerated not only copper, but also a substantial part of the other aforementioned impurities, compared to lead.
  • the temperature must be chosen according to the composition of the starting lead material, so that this composition is found within the gap of Pb-Cu- (As + Sn + Sb) miscibility at the temperature considered.
  • the present invention uses as a starting point a theoretical ternary diagram, illustrated in the figure, which is deduced from the known ternary diagrams Pb-Cu-Sn, Pb-Cu-As and Pb-Cu-Sb and which, given the strong resemblance between these known ternary diagrams can be considered reasonably as a good illustration of the actual behavior of the product.
  • the present invention avoids the disadvantageous phenomenon, observed for working temperatures of the order of 400 ° C., according to which there is a dissociation of the grains of impurities when the coalescence and the ascent rate were insufficient.
  • the decrease in the viscosity of the mixture at high temperatures according to the invention further accelerates to some extent the rate of rise of the impurity grains lighter than lead.
  • this value of approximately 3 for the abovementioned report implies a treatment temperature of the order of 800 ° C.
  • the demixing time is then of the order of 5 to 10 minutes.
  • the phase rich in impurities remains substantially frozen as to its composition as the cooling continues. More specifically, no recontamination of lead with the phase rich in impurities is observed.
  • the demixing carried out in accordance with the present invention is followed by a step of quenching at approximately 400 ° C., followed by a step of drying dross in order to facilitate their recovery, for example by conventional techniques, by avoiding any recontamination of the lead-rich phase.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP91400697A 1990-03-15 1991-03-14 Verfahren zum Raffinieren von Blei, insbesondere zum Entfernen von Kupfer Withdrawn EP0456528A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9003329A FR2659665B1 (fr) 1990-03-15 1990-03-15 Procede d'affinage, notamment de decuivrage, du plomb.
FR9003329 1990-03-15

Publications (1)

Publication Number Publication Date
EP0456528A1 true EP0456528A1 (de) 1991-11-13

Family

ID=9394770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400697A Withdrawn EP0456528A1 (de) 1990-03-15 1991-03-14 Verfahren zum Raffinieren von Blei, insbesondere zum Entfernen von Kupfer

Country Status (4)

Country Link
EP (1) EP0456528A1 (de)
JP (1) JPH04224639A (de)
AU (1) AU635398B2 (de)
FR (1) FR2659665B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101323905B (zh) * 2007-06-15 2010-07-21 西安华英实业有限公司 铜铅锌混合精矿的火法冶金工艺
WO2011089622A2 (en) * 2010-01-19 2011-07-28 Aditya Birla Science & Technology Co. Ltd. A system and method for monitoring and optimizing smelting operations of a furnace.
US20210071282A1 (en) * 2017-12-14 2021-03-11 Metallo Belgium Improved pyrometallurgical process
US11746395B2 (en) * 2017-12-14 2023-09-05 Metallo Belgium Solder production process
US11767576B2 (en) * 2017-12-14 2023-09-26 Metallo Belgium Copper/tin/lead production

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4565178B2 (ja) * 2004-07-29 2010-10-20 Ｄｏｗａメタルマイン株式会社 Ｐｂ中のＳｂ，Ｓｎ含有量低減方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572928A (en) * 1978-05-19 1980-08-06 Commw Smelting Ltd Refining of pyrometallurgical lead bullion
EP0152332A2 (de) * 1984-02-03 1985-08-21 Metaleurop S.A. Bleireinigungsverfahren

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1199180A (en) * 1982-02-11 1986-01-14 Duncan Ritchie Method of removing dross from a lead refining pot

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572928A (en) * 1978-05-19 1980-08-06 Commw Smelting Ltd Refining of pyrometallurgical lead bullion
EP0152332A2 (de) * 1984-02-03 1985-08-21 Metaleurop S.A. Bleireinigungsverfahren

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERZMETALL vol. XVI, no. 9, 1963, pages 443-451, Stuttgart, DE; F. JOHANNSEN et al.: "Untersuchungen zur Entkupferung von Werkblei" *
LEAD-ZINC-TIN '80 24-28 février 1980, pages 477-486, Las Vegas, US; T.R.A. DAVEY et al.: "The Physical Chemistry of Lead Refing" *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101323905B (zh) * 2007-06-15 2010-07-21 西安华英实业有限公司 铜铅锌混合精矿的火法冶金工艺
WO2011089622A2 (en) * 2010-01-19 2011-07-28 Aditya Birla Science & Technology Co. Ltd. A system and method for monitoring and optimizing smelting operations of a furnace.
WO2011089622A3 (en) * 2010-01-19 2011-10-06 Aditya Birla Science & Technology Co. Ltd. A system and method for monitoring and optimizing smelting operations of a furnace.
CN102933728A (zh) * 2010-01-19 2013-02-13 埃迪亚贝拉科技有限公司 一种监测和优化冶炼炉运行的系统和方法
US20210071282A1 (en) * 2017-12-14 2021-03-11 Metallo Belgium Improved pyrometallurgical process
US11746395B2 (en) * 2017-12-14 2023-09-05 Metallo Belgium Solder production process
US11767576B2 (en) * 2017-12-14 2023-09-26 Metallo Belgium Copper/tin/lead production
US11920210B2 (en) * 2017-12-14 2024-03-05 Metallo Belgium Pyrometallurgical process

Also Published As

Publication number Publication date
FR2659665B1 (fr) 1992-07-24
AU7282891A (en) 1991-09-19
JPH04224639A (ja) 1992-08-13
AU635398B2 (en) 1993-03-18
FR2659665A1 (fr) 1991-09-20

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