WO2014025269A1 - Procédé de retraitement de rebuts d'aluminium et d'alliage d'aluminium - Google Patents

Procédé de retraitement de rebuts d'aluminium et d'alliage d'aluminium Download PDF

Info

Publication number
WO2014025269A1
WO2014025269A1 PCT/PL2012/000083 PL2012000083W WO2014025269A1 WO 2014025269 A1 WO2014025269 A1 WO 2014025269A1 PL 2012000083 W PL2012000083 W PL 2012000083W WO 2014025269 A1 WO2014025269 A1 WO 2014025269A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminium
scrap
reprocessing
consolidated
density
Prior art date
Application number
PCT/PL2012/000083
Other languages
English (en)
Inventor
Wojciech LIBURA
Józef ZASADZIŃSKI
Original Assignee
"Equity Investors" Spółka Z Ograniczoną
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 "Equity Investors" Spółka Z Ograniczoną filed Critical "Equity Investors" Spółka Z Ograniczoną
Publication of WO2014025269A1 publication Critical patent/WO2014025269A1/fr

Links

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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
    • 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 this Invention is a method to reprocess aluminium and aluminium alloy scrap.
  • the method according to the Invention comprises a process of consolidating and melting shreds of aluminium and aluminium alloys, as well as other aluminium waste materials and aluminium granules.
  • the method according to the Invention may be utilized for recycling waste materials consisting of beverage cans made of aluminium alloys.
  • the aluminium or aluminium alloy scrap is shredded, i.e. fragmented into very small pieces, using diverse shredding machines. Those small pieces called 'shreds' are cleaned in order to remove unwanted chemical substances such as printer's inks, leftover products contained in aluminium containers, or other substances.
  • Various cleaning methods are used to clean the shredded scrap; among other things, a process of pyrolysis or flushing the shreds with chemical solutions showing a specific, predetermined chemical composition.
  • a process of pyrolysis or flushing the shreds with chemical solutions showing a specific, predetermined chemical composition In practice, the effectiveness of a pyrolysis process used to clean aluminium scraps depends on the shredding degree of aluminium shreds; the shreds must be adequately shredded to prevent the formation of closed spaces, which may not be completely cleaned because the access to them is difficult. Next, the properly cleaned aluminium shreds are melted; the final product is a solid alloy in the form of various sections.
  • the commonly used solutions comprise the shredding of aluminium scraps, the cleaning of the shredded product in a pyrolysis process, and the melting of the shredded and cleaned material; however, their essential drawback is the oxidation of some part of the cleaned aluminium shreds in the course of melting the shreds. This drawback causes raw material losses.
  • the aluminium cans are sorted out and cleaned in order to remove all other wastes.
  • the cans are heated to a temperature at which the organic substances and the printer's inks on the cans are charred.
  • the cleaned aluminium cans are pulverized and aluminium granules constitute the final product manufactured.
  • those aluminium granules are consolidated under an appropriate pressure.
  • the Patent No. RU2379357 discloses another Invention.
  • This Invention comprises a method where the metallic waste materials including aluminium scrap are cleaned through dipping them in a mixture of chemically neutral agents and, next, the shreds are further cleaned under a high pressure and at a temperature increasing successively from 0.22 to 0.70 of the melting point of the metal that the dipped shreds are made of.
  • the shreds cleaned with the use of those two methods are placed in a disc extruder where they are briquetted under a pressure ranging between 500 to 1000 kg/cm 2 .
  • the essence of the method for reprocessing aluminium and aluminium alloys scrap, and, specifically, the discarded beverage cans made of aluminium alloys consists in that the pre- shredded and cleaned, using a pyrolysis process, aluminium scrap is consolidated in a roll press, in its closed profiles of a trapezoidal cross-section, at temperatures ranging from 150°C to 390°C; the consolidation process continues until the density value of the aluminium scrap is close to the theoretical density of aluminium or aluminium alloy, i.e. not less than 90% thereof; next, the consolidated material is melted.
  • One preferable embodiment of the solution according to the present Invention provides that the aluminium or aluminium alloy scrap is shredded to obtain a fraction size of less than 50 mm; at the same time, the fraction size distribution is highly differentiated to make it possible to increase the charging consolidation of the shreds whereas the 'charging consolidation' means the consolidation and density of the scrap material being introduced into a charging device in the roll press.
  • Another preferable embodiment of the solution according to the present Invention consists in that, prior to being rolled in the closed profiles of a trapezoidal cross-section, the shredded aluminium or aluminium alloy scrap of a charging consolidation degree ranging between 40% and 54% of solid aluminium is pre- consolidated under a certain pressure in order to obtain its charging density of 70% to 80% of solid aluminium or solid aluminium alloy. Next, this pre-consolidated material is rolled in the closed profiles until its density reaches a value close to the value of theoretical density of solid aluminium or aluminium alloy.
  • a particularly preferable embodiment of the solution according to the present Invention is to use a continuous process for the reprocessing of aluminium or aluminium alloy scrap.
  • the method according to the present Invention has the following advantage : the losses of raw material that is melted are minimized and the energy consumption is reduced.
  • the cleaned scrap is either melted or consolidated in the course of a pressurized consolidation process.
  • raw material losses occur.
  • the manufactured 'pigs' are characterized by non-uniform (varying) physical-chemical parameters. The reason thereof is that different types of aluminium scrap are shredded; usually, they are made of various aluminium alloys. Practically, even with the highly shredded scrap material, during the pressurized consolidation process, it is impossible to manufacture ⁇ pigs' showing a uniform, reproducible physical-chemical structure similar to that produced when the scrap shreds are melted.
  • the method according to the present Invention provides for the melting of a consolidated material, not scrap shreds .
  • the density of the consolidated material is close to the density of a solid metal; therefore, it is possible to avoid processed material losses arising owing to the oxidation of the small sized shreds during the process of melting.
  • material losses occurring in the course of melting process essentially affect the profitability of aluminium scrap collection and recycling processes.
  • unexpected (surprising) benefits are gained.
  • the energy consumption during the entire process is essentially reduced.
  • the plasticity of the material to be rolled increases because, during the pyrolysis process, the highly shredded aluminium shreds are heated to a temperature ranging between 150° and 390°C, thus, they turn out to be softened.
  • the rolled material heats up the rolls in the roll press, therefore, they do not absorb heat from the shreds being rolled. Consequently, and compared to the melting of cooled scrap material, considerably less energy is necessary to melt the aluminium pigs manufactured during the rolling process.
  • Important is also the shape of rolls in the roll press. A closed profile of a trapezoidal cross-section appeared to be the optimal shape of the press. Owing to this profile, the workspace of the rolls impacts, in all planes, the rolled and consolidated mass of shreds; this fact is very important in the case the metallic fragments being rolled have different shapes and sizes. The applied trapezoidal cross-section of the press results in a higher consolidation efficiency.
  • the method for reprocessing aluminium and aluminium alloys scrap as exemplified by the embodiment described below consists in that aluminium beverage cans are shredded in a shredder in the course of a continuous shredding process in order to obtain a differentiated fraction size not exceeding 50 mm, and to obtain a charging density of ca. 55% of solid aluminium.
  • the shredded aluminium scrap is cleaned in a pyrolysis process at a temperature of 250°C.
  • the shreds, heated during the pyrolysis process are introduced directly into a charging hopper situated in the roll press whereas the roll press has closed profiles of a trapezoidal cross-section. In the roll press, under a pressure of 70 Pa and at a temperature of ca.
  • the shreds are consolidated, so, that their density value reaches 92% of the density of solid aluminium.
  • the final products manufactured are aluminium pigs of a trapezoidal cross-section; using a feeding device, those pigs are introduced directly into a melting furnace.
  • Another example of the embodiment of the method being the subject of the present Patent Claims shows that the discarded aluminium cans are shredded in order to obtain a fraction size of ca. 5 mm, and, next, they are cleaned in the course of a pyrolysis process at a temperature of 400°C.
  • the cleaned shreds' charging density is ca. 45% to 50% of the density of solid metal, their temperature after the completed pyrolysis process is ca. 390°C.
  • the material Prior to the rolling in a roll press with closed trapezoidal profiles, the material is pre-consolidated in an open roll press; consequently, the charging density of the consolidated shreds increases to a value of ca . 75% of the density of solid aluminium.
  • the material may be rolled in a roll press with closed profiles of a trapezoidal cross-section; the pressure applied during the rolling process is 120 MPa, and the temperature is ca. 320°C.
  • the final product after the completed rolling process is an aluminium bar that has a trapezoidal cross- section, its density value is ca. 98% of the theoretical density of aluminium, and its temperature is ca . 300°C; next, the aluminium bar showing the above indicated parameters is melted.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de retraitement de rebuts d'aluminium ou d'alliage d'aluminium consistant en ce que les rebuts d'aluminium sont prédéchiquetés et nettoyés au cours d'un procédé de pyrolyse de façon à éliminer des substances indésirées ; ensuite, immédiatement après que la pyrolyse est terminée, la matière déchiquetée et nettoyée est consolidée à une température élevée se situant entre 150°C et 390°C dans une presse à rouleau avec un profil fermé d'une section transversale trapézoïdale; en raison de cette technologie de retraitement spécifique, la matière finale produite a une valeur de densité égalant au moins 90 % de la densité théorique de l'aluminium ou de l'alliage d'aluminium ; dans la dernière étape de retraitement, la matière produite est fondue. Le procédé de laminage peut être effectué à une pression se situant dans la plage de 70 à 180 MPa. Dans le cas où la densité de la matière déchiquetée est inférieure à 55 % de l'aluminium solide, alors, avant le laminage dans le profil fermé, la matière peut être additionnellement préconsolidée dans la presse à rouleau de façon à fabriquer une matière préconsolidée d'une densité de charge égalant environ 70 %-80 % de la densité théorique.
PCT/PL2012/000083 2012-08-08 2012-09-10 Procédé de retraitement de rebuts d'aluminium et d'alliage d'aluminium WO2014025269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL40029312A PL400293A1 (pl) 2012-08-08 2012-08-08 Sposób przeróbki odpadów z aluminium i stopów aluminium
PLP.400293 2012-08-08

Publications (1)

Publication Number Publication Date
WO2014025269A1 true WO2014025269A1 (fr) 2014-02-13

Family

ID=47019131

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2012/000083 WO2014025269A1 (fr) 2012-08-08 2012-09-10 Procédé de retraitement de rebuts d'aluminium et d'alliage d'aluminium

Country Status (2)

Country Link
PL (1) PL400293A1 (fr)
WO (1) WO2014025269A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB540105A (en) 1940-04-02 1941-10-06 Max Stern A process for briquetting or ingoting scrap of light metals or alloys
US3627288A (en) * 1970-02-24 1971-12-14 Michigan Foundry Supply Appara Deoiling and briquetting apparatus
DE4213441A1 (de) 1992-04-21 1993-10-28 Goldemann Raul Verfahren zum Recyclen von Metallspänen
RU2379357C2 (ru) 2007-07-26 2010-01-20 Андрей Викторович Чурин Способ получения брикета для раскисления чугуна или стали
KR20100024534A (ko) 2008-08-26 2010-03-08 김통일 온라인 창의력 학습방법
KR20100024532A (ko) * 2008-08-26 2010-03-08 윤수현 알루미늄 탈산제 및 그 제조방법
GB2482885A (en) * 2010-08-20 2012-02-22 Chinook Sciences Ltd Briquettes for deoxidizing steel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB540105A (en) 1940-04-02 1941-10-06 Max Stern A process for briquetting or ingoting scrap of light metals or alloys
US3627288A (en) * 1970-02-24 1971-12-14 Michigan Foundry Supply Appara Deoiling and briquetting apparatus
DE4213441A1 (de) 1992-04-21 1993-10-28 Goldemann Raul Verfahren zum Recyclen von Metallspänen
RU2379357C2 (ru) 2007-07-26 2010-01-20 Андрей Викторович Чурин Способ получения брикета для раскисления чугуна или стали
KR20100024534A (ko) 2008-08-26 2010-03-08 김통일 온라인 창의력 학습방법
KR20100024532A (ko) * 2008-08-26 2010-03-08 윤수현 알루미늄 탈산제 및 그 제조방법
GB2482885A (en) * 2010-08-20 2012-02-22 Chinook Sciences Ltd Briquettes for deoxidizing steel

Also Published As

Publication number Publication date
PL400293A1 (pl) 2014-02-17

Similar Documents

Publication Publication Date Title
CA2932903C (fr) Methode et systeme de production de rondins d'extrusion
CN202164343U (zh) 用于残废钛回收重熔工艺的电极装置
CN104194419A (zh) 一种废轮胎裂解系统及工艺
WO2011032696A1 (fr) Procédé de recyclage de l'aluminium des boîtes de boisson
EA026171B1 (ru) Способ рециркуляции отходов термопластичных материалов и использование такого рециркулированного термопласта в производстве композиционного материала
EP2942173B1 (fr) Procédé de fabrication de granulé pour moulage par injection d'une pièce moulée
JP2017501038A5 (fr)
KR101002982B1 (ko) 자동차시트용 재생스크랩 컴파운드의 제조방법 및 그의 제조장치
KR20130141126A (ko) 폐자동차 차체의 철금속류 회수방법
DE1929232B2 (de) Verfahren zum zerkleinern von schrott
CN202922789U (zh) 一种新型废旧塑料再生颗粒机
WO2014025269A1 (fr) Procédé de retraitement de rebuts d'aluminium et d'alliage d'aluminium
CN103191947A (zh) 一种紫杂铜颗粒连续挤压方法
JP2002067029A (ja) 使用済みプラスティックの再資源化処理方法及びその再資源化成型物
KR20140033936A (ko) 폐 스티로폼을 폴리스티렌 잉곳 펠릿 또는 발포성 잉곳 펠릿으로 재생하는 폐 스티로폼 재생 방법 및 장치 그리고 그 잉곳 펠릿
CN107900084A (zh) 一种生活废物金属制品的处理方法
WO2009099101A1 (fr) Procédé de fabrication de briquettes métalliques
Pardoe CONFORM continuous extrusion process–its contribution to energy conservation
JPH07188798A (ja) アルミニウム缶屑再生の処理方法
DE19512550C1 (de) Verfahren und Einrichtung zur Aufbereitung von Gebinden
KR20150064001A (ko) 폐 페인트 캔의 페인트와 철 분리 재활용 장치
JPH01188637A (ja) アルミニウム缶屑の処理方法
CN102786712B (zh) 一种废旧热固性塑料再生设备及再生工艺
JP2012513299A (ja) 廃タイヤの処理時に発生する繊維群を処理する方法及び該方法を実施するための設備
KR20140005331U (ko) 폐 페인트 캔의 페인트와 철 분리 재활용 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12772822

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12772822

Country of ref document: EP

Kind code of ref document: A1