WO2020031060A1 - Method for obtaining a brass billet with reduced lead content and the billet thus obtained - Google Patents

Method for obtaining a brass billet with reduced lead content and the billet thus obtained Download PDF

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Publication number
WO2020031060A1
WO2020031060A1 PCT/IB2019/056643 IB2019056643W WO2020031060A1 WO 2020031060 A1 WO2020031060 A1 WO 2020031060A1 IB 2019056643 W IB2019056643 W IB 2019056643W WO 2020031060 A1 WO2020031060 A1 WO 2020031060A1
Authority
WO
WIPO (PCT)
Prior art keywords
brass
lead
fragments
lead content
traditional
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.)
Ceased
Application number
PCT/IB2019/056643
Other languages
English (en)
French (fr)
Inventor
Gabriele GNUTTI
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.)
ALMAG SpA Azienda Lavorazioni Metallurgiche Ed Affini Gnutti
Original Assignee
ALMAG SpA Azienda Lavorazioni Metallurgiche Ed Affini Gnutti
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 ALMAG SpA Azienda Lavorazioni Metallurgiche Ed Affini Gnutti filed Critical ALMAG SpA Azienda Lavorazioni Metallurgiche Ed Affini Gnutti
Priority to AU2019316802A priority Critical patent/AU2019316802A1/en
Priority to ES19752269T priority patent/ES2932869T3/es
Priority to IL280783A priority patent/IL280783B2/en
Priority to PL19752269.1T priority patent/PL3833792T3/pl
Priority to LTEPPCT/IB2019/056643T priority patent/LT3833792T/lt
Priority to RS20221106A priority patent/RS63799B1/sr
Priority to EP19752269.1A priority patent/EP3833792B1/en
Priority to CA3108319A priority patent/CA3108319A1/en
Priority to DK19752269.1T priority patent/DK3833792T3/da
Priority to JP2021505986A priority patent/JP7486200B2/ja
Priority to US17/264,513 priority patent/US20210291268A1/en
Priority to MDE20210550T priority patent/MD3833792T2/ro
Priority to HRP20221468TT priority patent/HRP20221468T1/hr
Priority to SI201930405T priority patent/SI3833792T1/sl
Priority to CN201980053642.9A priority patent/CN112703261B/zh
Publication of WO2020031060A1 publication Critical patent/WO2020031060A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C22B7/007—Wet processes by acid leaching
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • 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 subject of the present invention is a method for obtaining a brass billet and a brass billet thus obtained.
  • the subject of the present invention is a brass billet with a reduced lead content.
  • brass is defined as “lead-free” if the lead content is less than 0.1% by weight; it is defined as “low lead content” if the lead content is between 0.1% and 0.2% by weight.
  • Traditional brass normally has a lead content varying between 1.5% and 3.5%.
  • brass an alloy of copper (Cu) and zinc (Zn)
  • Cu copper
  • Zn zinc
  • the present invention concerns on the other hand an innovative method for obtaining brass billets with a reduced lead content compared to the usual one, and the billet thus obtained.
  • traditional brass chips i.e. with normal lead content
  • a method for obtaining brass billets with reduced lead content provides for a step of obtaining traditional brass chips.
  • Said traditional brass chips are the result of mechanical machining by chip removal performed on semi ⁇ finished or finished products made of traditional brass.
  • the chip takes on the characteristic curled shape or a more shredded appearance.
  • the method further provides for subjecting traditional brass chips, after washing to remove dirt and pollutants such as cooling fluids and/or lubricants if necessary, to a mechanical fragmentation treatment, aimed at increasing the ratio between the total surface area of the chips and the overall volume occupied. From the fragmentation treatment, traditional brass fragments are obtained .
  • said mechanical fragmentation treatment consists of a grinding of the traditional chips.
  • the traditional chip fragments are subjected to a chemical treatment to reduce the lead content .
  • Said chemical treatment consists of a lead removal performed by immersing the fragments of traditional brass in a bath with a solution of water and one or more organic acids.
  • said organic acids are selected from the group comprising butyric acid, propionic acid, 2- propenoic acid, acrylic acid.
  • the lead removal bath is agitated, e.g. by ultrasound or mechanically.
  • the lead removal treatment produces brass fragments with a reduced lead content.
  • the fragmentation treatment and lead removal treatment are performed again, recursively.
  • the lead removal treatment is performed on traditional, non-fragmented brass chips, and the subsequent fragmentation treatment (and further lead removal) is performed if the lead content of the chips subjected to the previous lead removal is not sufficiently low.
  • the fragments are subjected to a pressing before a further fragmentation treatment is carried out.
  • this allows the external surface of the fragments, on which the lead removal treatment mainly acts, to be increased.
  • the brass fragments with reduced lead content finally obtained are used as charge for a melting furnace, preferably together with substantially pure copper and zinc (e.g. copper foil and zinc cakes) and/or further brass scrap, to obtain a melting bath having a desired metallurgical composition.
  • substantially pure copper and zinc e.g. copper foil and zinc cakes
  • further brass scrap e.g. copper foil and zinc cakes
  • the molten metal is used to obtain a billet by means of direct or inverted extrusion.
  • the method according to the present invention is extremely advantageous from an industrial point of view, as it allows the use of traditional brass chips, i.e. with a normal lead content, to obtain brass billets with a reduced lead content.
  • the use of chips allows machining by chip removal in a remote plant, usually by the user of the bar, in order to produce a semi-finished or finished product, and the fragmentation of the chips and the lead removal bath in a main plant.
  • the chips are transported from the remote plant to the main plant.
  • the machining step for chip removal is performed in a first remote plant, usually by the user of the bar, in order to produce a semi-finished or finished product, the traditional brass chips are transported to a second remote plant, the fragmentation and lead removal treatments are performed in said second remote plant. Finally, the brass fragments with reduced lead content are transported to a main plant where they are melted, and the new billet is created.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Conductive Materials (AREA)
  • Forging (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
PCT/IB2019/056643 2018-08-10 2019-08-05 Method for obtaining a brass billet with reduced lead content and the billet thus obtained Ceased WO2020031060A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
AU2019316802A AU2019316802A1 (en) 2018-08-10 2019-08-05 Method for obtaining a brass billet with reduced lead content and the billet thus obtained
ES19752269T ES2932869T3 (es) 2018-08-10 2019-08-05 Procedimiento para obtener un tocho de latón con contenido en plomo reducido y tocho así obtenido
IL280783A IL280783B2 (en) 2018-08-10 2019-08-05 A method for obtaining a brass ingot with a reduced lead content and a brass ingot obtained by this method
PL19752269.1T PL3833792T3 (pl) 2018-08-10 2019-08-05 Sposoby otrzymywania mosiężnych polan o obniżonej zawartości ołowiu i otrzymane w ten sposób polana
LTEPPCT/IB2019/056643T LT3833792T (lt) 2018-08-10 2019-08-05 Būdas, skirtas gauti žalvario ruošinį su sumažintu švino kiekiu, ir tokiu būdu gautas ruošinys
RS20221106A RS63799B1 (sr) 2018-08-10 2019-08-05 Postupak za dobijanje mesingane grede sa smanjenim sadržajem olova i tako dobijena greda
EP19752269.1A EP3833792B1 (en) 2018-08-10 2019-08-05 Method for obtaining a brass billet with reduced lead content and the billet thus obtained
CA3108319A CA3108319A1 (en) 2018-08-10 2019-08-05 Method for obtaining a brass billet with reduced lead content and the billet thus obtained
DK19752269.1T DK3833792T3 (da) 2018-08-10 2019-08-05 Fremgangsmåde til opnåelse af en messingbarre med reduceret blyindhold og den dermed opnåede barre
JP2021505986A JP7486200B2 (ja) 2018-08-10 2019-08-05 鉛含有量を低減した黄銅ビレットを得る方法およびその方法により得られるビレット
US17/264,513 US20210291268A1 (en) 2018-08-10 2019-08-05 Method for obtaining a brass billet with reduced lead content and the billet thus obtained
MDE20210550T MD3833792T2 (ro) 2018-08-10 2019-08-05 Metodă de obţinere a unei țagle de alamă cu conținut redus de plumb și țaglă astfel obținută
HRP20221468TT HRP20221468T1 (hr) 2018-08-10 2019-08-05 Postupak za dobivanje mjedene gredice sa smanjenim sadržajem olova i tako dobivena gredica
SI201930405T SI3833792T1 (sl) 2018-08-10 2019-08-05 Postopek za pridobivanje medeninastih gredic z zmanjšano vsebnostjo svinca in tako pridobljena gredica
CN201980053642.9A CN112703261B (zh) 2018-08-10 2019-08-05 用于获得具有降低铅含量的黄铜坯锭的方法和由此获得的坯锭

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000008041A IT201800008041A1 (it) 2018-08-10 2018-08-10 Processo per l’ottenimento di una billetta di ottone a ridotto tenore di piombo e billetta così ottenuta
IT102018000008041 2018-08-10

Publications (1)

Publication Number Publication Date
WO2020031060A1 true WO2020031060A1 (en) 2020-02-13

Family

ID=64049591

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/056643 Ceased WO2020031060A1 (en) 2018-08-10 2019-08-05 Method for obtaining a brass billet with reduced lead content and the billet thus obtained

Country Status (20)

Country Link
US (1) US20210291268A1 (https=)
EP (1) EP3833792B1 (https=)
JP (1) JP7486200B2 (https=)
CN (1) CN112703261B (https=)
AU (1) AU2019316802A1 (https=)
CA (1) CA3108319A1 (https=)
DK (1) DK3833792T3 (https=)
ES (1) ES2932869T3 (https=)
HR (1) HRP20221468T1 (https=)
HU (1) HUE060553T2 (https=)
IL (1) IL280783B2 (https=)
IT (1) IT201800008041A1 (https=)
LT (1) LT3833792T (https=)
MD (1) MD3833792T2 (https=)
PL (1) PL3833792T3 (https=)
PT (1) PT3833792T (https=)
RS (1) RS63799B1 (https=)
SI (1) SI3833792T1 (https=)
TW (1) TWI780351B (https=)
WO (1) WO2020031060A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051683A (fr) * 1952-02-19 1954-01-18 Perfectionnements apportés aux procédés d'affinage par voie humide de métaux et d'alliages métalliques non ferreux
US2825644A (en) * 1954-01-28 1958-03-04 Kemp Paul Process of removing lead from copper base alloys
EP1134306A1 (en) * 2000-03-17 2001-09-19 Ruvaris S.r.l. Selective deleading process and bath for plumbing components made of a copper alloy
CN106350689A (zh) * 2016-08-31 2017-01-25 宁波长振铜业有限公司 废杂铜直接生产铜合金的方法
WO2017199147A1 (en) * 2016-05-18 2017-11-23 Almag S.P.A. A method for manufacturing a lead-free or low lead content brass billet and billet thus obtained

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05186839A (ja) * 1992-01-10 1993-07-27 Kobe Steel Ltd 黄銅系合金溶湯からのＰｂ除去方法
DE69521064T2 (de) * 1995-08-03 2002-01-03 Europa Metalli S.P.A., Florenz/Firenze Komponente aus bleienthaltenden kupferlegierungen mit niedriger bleiauslaugung und verfahren zur herstellung
US5958257A (en) * 1997-01-07 1999-09-28 Gerber Plumbing Fixtures Corp. Process for treating brass components to reduce leachable lead
US6197210B1 (en) * 1998-08-17 2001-03-06 Gerber Plumbing Fixtures Corp. Process for treating brass components to substantially eliminate leachabale lead
TWI387656B (zh) * 2009-07-06 2013-03-01 Modern Islands Co Ltd Preparation of Low Lead Brass Alloy and Its
US20180195149A1 (en) * 2015-11-13 2018-07-12 Wing On (Japan) Trading Limited De-leading treatment method for lead-containing copper alloy and de-leading cored wire used in said method
TWI598452B (zh) * 2016-01-21 2017-09-11 慶堂工業股份有限公司 具優異熔鑄性之無鉛快削黃銅合金及其製造方法和用途
CN106947882B (zh) * 2017-04-02 2019-07-05 江苏新宏泰摩擦材料有限公司 一种鳞片状环保黄铜屑及其制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051683A (fr) * 1952-02-19 1954-01-18 Perfectionnements apportés aux procédés d'affinage par voie humide de métaux et d'alliages métalliques non ferreux
US2825644A (en) * 1954-01-28 1958-03-04 Kemp Paul Process of removing lead from copper base alloys
EP1134306A1 (en) * 2000-03-17 2001-09-19 Ruvaris S.r.l. Selective deleading process and bath for plumbing components made of a copper alloy
WO2017199147A1 (en) * 2016-05-18 2017-11-23 Almag S.P.A. A method for manufacturing a lead-free or low lead content brass billet and billet thus obtained
CN106350689A (zh) * 2016-08-31 2017-01-25 宁波长振铜业有限公司 废杂铜直接生产铜合金的方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ATSUSHI NAKANO ET AL: "Removal of Lead from Copper Alloy Scraps by Compound-Separation Method", MATERIALS TRANSACTIONS, vol. 46, no. 12, 15 December 2005 (2005-12-15), JP, pages 2719 - 2724, XP055574044, ISSN: 1345-9678, DOI: 10.2320/matertrans.46.2719 *

Also Published As

Publication number Publication date
AU2019316802A1 (en) 2021-02-25
IT201800008041A1 (it) 2020-02-10
CN112703261B (zh) 2022-08-16
JP2022502563A (ja) 2022-01-11
SI3833792T1 (sl) 2023-01-31
IL280783A (en) 2021-04-29
EP3833792A1 (en) 2021-06-16
DK3833792T3 (da) 2022-12-12
IL280783B1 (en) 2024-03-01
CN112703261A (zh) 2021-04-23
TWI780351B (zh) 2022-10-11
HUE060553T2 (hu) 2023-03-28
JP7486200B2 (ja) 2024-05-17
TW202017676A (zh) 2020-05-16
LT3833792T (lt) 2022-12-27
EP3833792B1 (en) 2022-09-07
PL3833792T3 (pl) 2023-01-09
PT3833792T (pt) 2022-12-13
CA3108319A1 (en) 2020-02-13
ES2932869T3 (es) 2023-01-27
RS63799B1 (sr) 2022-12-30
IL280783B2 (en) 2024-07-01
MD3833792T2 (ro) 2023-01-31
US20210291268A1 (en) 2021-09-23
HRP20221468T1 (hr) 2023-02-03

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