WO2014011061A1 - Procédé de séparation d'une fraction de 3-10 mm d'un déchet de verre d'une qualité de matière première pour verre et sensiblement homogène en termes de couleur de verre - Google Patents

Procédé de séparation d'une fraction de 3-10 mm d'un déchet de verre d'une qualité de matière première pour verre et sensiblement homogène en termes de couleur de verre Download PDF

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Publication number
WO2014011061A1
WO2014011061A1 PCT/PL2012/000071 PL2012000071W WO2014011061A1 WO 2014011061 A1 WO2014011061 A1 WO 2014011061A1 PL 2012000071 W PL2012000071 W PL 2012000071W WO 2014011061 A1 WO2014011061 A1 WO 2014011061A1
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WO
WIPO (PCT)
Prior art keywords
glass
color
glass cullet
cullet
sorting
Prior art date
Application number
PCT/PL2012/000071
Other languages
English (en)
Inventor
Adam KRYNICKI
Paweł KOŁAKOWSKI
Grzegorz CHMIELEWSKI
Original Assignee
Krynicki Recykling S.A.
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 Krynicki Recykling S.A. filed Critical Krynicki Recykling S.A.
Publication of WO2014011061A1 publication Critical patent/WO2014011061A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B1/00—Preparing the batches
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/002—Use of waste materials, e.g. slags
    • 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
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping

Definitions

  • the present invention relates to a method for separation (isolation) of a 3-10 mm fraction of glass cullet of a quality of glass raw material and substantially homogenous (uniform) as to the glass color.
  • a glass cullet constitutes a valuable raw material for glass-making industry, provided that it meets respective quality requirements related to the level of impurities.
  • Isolation of glass cullet from municipal wastes, and purification of the cullet from organic material residues involves considerable technical difficulties, in particular in the case of fine-grain fraction of glass cullet. These difficulties increase when separating cullet of a uniform color, being the most desirable material for the glass-works.
  • International publication WO 98/25860 discloses a method for thermal treatment of glass cullet in order to obtain raw material for glass-making industry, in which method through a bed of glass cullet hot gasses are passed of such temperature so as to cause pyrolysis of impurities.
  • the hot gases are combustion gases of a temperature 400-500°C.
  • International publication WO 2006/055238 discloses a method for creating a batch of mixed glass cullet, comprising recovering first mixed cullet and second mixed cullet from a glass-making plant, and respectively combining first and second glass cullet according to the weight ratio and percent contents so as to obtain a formulation to produce glass of a desired color. It is the aim of the invention to provide a method for isolation of glass cullet of a glass raw material quality and substantially uniform as to the glass color, in a form of 3-10 mm fraction.
  • a method for isolation of 3-10 mm fraction of glass cullet of a glass raw material quality and substantially uniform as to the glass color is characterized in that a material of granularity of 0-10 mm comprising glass cullet and substantially free of plastics, is subjected to a vibration drying at a temperature of 250-350°C with separation of fine-grained impurities by suction, and the dried and preliminary purified material comprising glass cullet is subjected to a mechanical abrasive treatment in a de-labeling machine, by moving the glass cullet-comprising material with the use of rotational paddles arranged on a common shaft, and then the sub-grain fraction of a size below 3 mm is screened off, said sub-grain fraction constituting entirely wastes, and the oversized particles constituting purified glass cullet are directed to color sorting, where during screening of the glass cullet-comprising material and during transferring the purified glass cullet to color sorting a suction
  • the glass of the first color is colorless glass
  • the glass of the second color is brown glass
  • the glass of the third color is green glass.
  • the secondary glass cullet stream comprising mainly glass cullet of the second and third color, is introduced into a third step of sorting to separate the remaining impurities of ceramics and stones, to isolate furthermore glass cullet of the second and third colors of a glass raw material quality.
  • the second and third steps of sorting are carried out in parallel in a single optoelectronic sorter, said sorter having a first and second segment, where the second step is carried out in the first segment and the third step is carried out in the second segment.
  • the main glass cullet stream discharged from the first step of color sorting is a stream of colorless glass cullet containing at most 0.018% by weight of impurities of stones and ceramics, and at most 6% by weight of brown glass and/or 6% by weight of green glass.
  • the obtained 3-10 mm fraction of glass cullet of the first color of a glass raw material quality and substantially uniform as to the glass color is the colorless glass cullet containing at most 0.002% by weight of impurities of stones and ceramics, and at most 3% by weight of brown glass and/or 1% by weight of green glass.
  • the colorless glass cullet of a glass raw material quality and substantially uniform as to the color is obtained by processing of at least 6 t/h of material of a granularity of 0-10 mm comprising glass cullet.
  • the vibration drying is performed at a temperature of 280-320°C, in particular at a temperature of approximately 300°C.
  • the method of the invention enables to isolate from municipal wastes a quality raw material for glass-making industry, from a fine-grain fraction of below 10 mm, which usually constitutes wastes.
  • the method enables effective removal of dust and fine particle impurities and effective sorting of the isolated glass cullet to obtain a fraction comprising glass of a uniform color.
  • a fraction comprising glass of other colors is obtained. Since the prevailing fraction in the glass cullet is colorless glass, and moreover this kind of glass is the most demanded one by the glass-works, then preferably the glass obtained of uniform color in the method of the invention is colorless glass, and the produced side fraction of glass cullet is a fraction comprising mixed brown and green glass.
  • a mechanical abrasive treatment following obligatory a vibration drying and suction of dust and fine particles, solves the problem related to the presence of impurities on a glass surface. It has been found that the total level of impurities remaining on the glass surface does not exceed 5%, and this makes it possible to recover effectively glass cullet of a lower limit of glass granularity of 3 mm, while maintaining the quality characteristics required by glass-making plants, including mainly the level of impurities in a form of stones and ceramics (identified by optoelectronic sorters by absence of transparency) at a level of 0.002% by weight.
  • Fig. 1 shows a flow diagram of operations performed in the method of the invention.
  • glass cullet of a glass raw material quality is the glass cullet comprising at most 0.002% by weight of ceramics and stones, substantially free of organic impurities.
  • glass cullet substantially uniform as to the glass color is the glass cullet of first color, comprising at most 3% by weight of glass of second color and at most 1% by weight of glass of third color.
  • the glass cullet substantially uniform as to the glass color is the glass cullet of colorless glass comprising at most 3% by weight of brown glass and at most 1% by weight of green glass.
  • material of a granularity of 0-10 mm comprising glass cullet, substantially free of plastics is a sub- grain fraction being a side product from crushing wastes comprising glass and glass cullet, obtained as a result of screening of crushed wastes recovered from waste dumps, municipal wastes and wastes originated during recovering materials for recycling, as well as separated on sieves and non-purified production wastes from glass cullet treatment processes.
  • a material of a granularity of 0-10 mm comprising glass cullet and substantially free of plastics is supplied.
  • Glass cullet is typically the glass cullet of colorless, brown and green glass.
  • the amount ratios of the individual kinds of glass in the glass cullet can vary, depending on the origin of the material, although usually 60-65% of the glass cullet constitutes colorless glass cullet.
  • the material used of a granularity of 0-10 mm comprising glass cullet is substantially free of plastics, in particular thermoplastic plastics. Plastics are mostly removed from the waste material by known methods, before screening off the 0-10 mm fraction of the material, e.g. by such methods as the ones disclosed in WO 2006/017285 and in the documents quoted therein. Presence of thermoplastic plastics may unfavorably affect sorting operations used in the method, due to a possibility of agglomeration of the components at higher temperatures.
  • Material of a granularity of 0-10 mm comprising glass cullet is moist or wet and this assists adherence of grains included therein of diverse size and content.
  • the inventors have found that this property unfavorably affects the processes of mechanical sorting used in the method of the invention, and the process of drying of the material is obligatory required. Therefore, it is contemplated in the method that the material of a granularity of 0-10 mm comprising glass cullet is fed by means of a hopper 1 into a conveyor device that conveys the material to a drying device 2.
  • the conveyor device may by a conveyor of any type, such as for example belt conveyor.
  • the drying is performed in a drying device 2, through which the material of a granularity of 0-10 mm comprising glass cullet is passed on a vibration supporting member.
  • the drying temperature amounts to 250-350°C, preferably 280-320°C, and more preferably approximately 300°C.
  • the dwelling time for the material inside the drying device 2 is about 1 minute.
  • drying combined with vibrating of the material causes the effective separation of fine-grained impurities, such as clays, sands, fibers and other organic impurities.
  • the purification of the material is enhanced by suction of impurities that are discharged by venting systems into an external filter 3 where they are collected.
  • the drying device 2 is preferably a gas dryer equipped with a vibrating supporting member such as a vibrating gutter or a vibrating plate.
  • the vibrating gutter or plate is provided with perforations by which a gaseous mixture flows from below, such as air, combustion gases and/or a mixture of air and combustion gases. Exhaust gases along with evaporated water and at least a part of dust impurities are discharged from above the layer of the material being dried.
  • the gaseous mixture flowing through perforations is a hot gaseous mixture, but it can also be a cold gaseous mixture, if thermal energy is supplied by other means (e.g. IR radiators). It is also contemplated a solution of the inventive method wherein to the drying device 2 hot gaseous mixture is supplied and at the exit from the drying device 2 cold gaseous mixture is supplied so as to cool the dried material down.
  • the drying process may be also performed in a drying device 2 of another type, provided that drying is effected with vibrating of the material to be dried so as drying is accompanied by suction of dust, sand, fibers and other fine-grained impurities, since during the process of drying and vibrating of the material, an effective separation of impurities from the glass cullet occurs.
  • a drying device 2 may by a conveyor of any type, such as for example a belt conveyor.
  • the purpose of mechanical abrasive treatment is to remove impurities strongly adhered to the glass surface, such as sand, clays and organic impurities, in particular to remove portions of labels that had been glued to glass packagings subjected to commercial turnover.
  • the process of mechanical abrasive treatment is preferably carried out in a de-labeling machine 4.
  • the de-labeling machine 4 is a form of an inclined gutter with a rotary shaft positioned along the gutter axis, on which shaft paddles (blades) are transversely arranged.
  • the planes of the paddles are inclined by an angle different than 90° to the gutter axis, being in conformity with the material movement direction.
  • the dwelling time of the dried and preliminary purified glass cullet-comprising material in the de-labeling machine 4 amounts to approximately 5 minutes.
  • the inventors have unexpectedly found that insufficient separation of sand grains preceding the mechanical abrasive treatment causes that the extent of impurities still adhered to the glass surface (mainly constituted by label residues) exceeds 5% of the surface, and this is an undesirable effect.
  • the use of the drying process along with vibrations and suction of fine-grained impurities, as a process preceding the mechanical abrasive treatment in the de-labeling machine 4 makes it possible to achieve a high level of separation of impurities strongly adhered to the glass surface, i.e. at a level not exceeding 5% of the surface.
  • Sub-grain of a size smaller than 3 mm constitutes wastes and it is not useful for further sorting.
  • the suction of paper fragments is performed.
  • a conveyor device of any type is used, such as for example a belt conveyor.
  • the purified glass cullet-comprising typically a mixture of glass of a first color, glass of a second color, glass of a third color, as well as stones and ceramic particles (porcelain, faience, etc.) is transferred for color sorting. Sorting is performed with the use of optoelectronic sorter 6, 7, for example as the one disclosed in WO 2005/016835.
  • two-step color sorting is applied, where in the first step a three-way optoelectronic sorter 6 is used to separate purified glass cullet into three streams: a main glass cullet stream comprising mainly the glass cullet of the first color, a secondary glass cullet stream comprising mainly glass cullet of the second and third colors; and a waste stream comprising mainly stones and ceramics.
  • the main glass cullet stream comprising mainly glass cullet of the first color also comprises impurities in a form of glass of the second and third colors, and stone and ceramics impurities.
  • the purified glass cullet constitutes glass cullet comprising colorless glass, brown glass and green glass. Usually, 60-65% by weight of glass cullet constitutes colorless glass cuUet. This is also the most valuable raw material for glass-making plants.
  • it is the purpose of color sorting to obtain colorless glass cullet. As a result of previous drying with vibrations and mechanical abrasive treatment, color sorting of 3-10 mm glass cullet is very efficient.
  • the first step of color sorting leads to obtaining colorless glass cullet comprising at most 0.018% by weight of impurities constituted by stones and ceramics, and comprising at most 6% by weight of brown glass and/or at most 6% by weight of green glass.
  • the main glass cullet stream comprising mainly glass cullet of the first color is conveyed to the second step of color sorting.
  • a two-way optoelectronic sorter 7 is used, to separate the remaining impurities of stone and ceramics and glass of the second and third colors.
  • a stream of glass cullet of the first color is obtained as well as a stream comprising impurities (stones and ceramics, as well as glass of the second and third colors, jointly).
  • the stream of glass cullet of the first color is a stream of colorless glass cullet comprising as impurities at most 0.002% by weight of ceramics and stones, and at most 3% by weight of brown glass and/or at most 1% by weight of green glass (3-10 mm fraction). Glass cullet of this level of impurities meets the requirements for the glass raw material with regard to the level of stone and ceramics impurities and as to the color uniformity.
  • the secondary stream from the first step comprising mainly glass cullet of the second and third color
  • a third step of color sorting is conveyed to a third step of color sorting.
  • the residual impurities constituted by stones and ceramics are removed, to obtain additionally glass cullet of a glass raw material quality (but non-uniform as to its color).
  • the two-way optoelectronic sorter is equipped with a partition that divides the separation volume of the sorter into two segments, a segment intended for receiving the main stream of glass cullet from the sorter 6, and a segment intended for receiving the secondary stream of the glass cullet from the sorter 6.
  • the second step and the third step of sorting are carried out in parallel, in one sorter 7.
  • Feeding individual streams from the sorter 6 into the respective segments of the sorter 7 is effected by gravity, i.e. the mutual arrangement of sorters is such that the respective streams of glass cullet discharged from the sorter 6 fall down directly to the respective segments of the sorter 7.
  • Material of a granularity of 0-10 mm comprising glass cullet (sub-grain fraction constituting a side product from crushing wastes comprising glass and glass cullet, obtained as a result of screening crushed wastes) in an amount of 6 t/h is fed through a hopper 1 to a gas dryer 2 of an internal temperature of approximately 300°C, onto a vibrating gutter on which the material is transferred with vibrations, staying inside of the dryer 2 for 1 minute.
  • the vibrating gutter has perforations through which hot combustion gases are blown from below. Fine-grained organic impurities, sand and dusts are removed by suction and transferred to an external filter 3.
  • the dried and preliminary purified material comprising glass cullet is transported on a belt conveyor to a de-labeling machine 4 of a type BET 10/40 (Binder & Co. AG).
  • the material comprising purified glass cullet and non-vitreous particles separated from the glass surface is discharged from the de-labeling machine 4 on a belt conveyor and fed to a sieve to separate the oversized particle fraction constituting the purified glass cullet (3-10 mm fraction) which is transported on a belt conveyor to an optoelectronic sorter 6.
  • suction tips for suction of cellulosic fibers and dust released (suction through the cyclone) during mechanical abrasive treatment in the de-labeling machine 4.
  • Sub-grain particles of a size below 3 mm constitute wastes.
  • a three-way optoelectronic sorter 6 is used to separate the purified glass cullet into three streams:
  • the stream 1.1 after the first step of sorting comprises:
  • the stream after sorting of the second step (discharged from the segment II.1 of the sorter) comprises:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Solid Wastes (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Sorting Of Articles (AREA)

Abstract

La présente invention concerne un procédé permettant d'isoler une fraction de 3-10 mm d'un déchet de verre d'une qualité de matière première pour verre et sensiblement homogène en termes de couleur de verre. Selon le procédé, un matériau d'une granulométrie de 0-10 mm comprenant un déchet de verre et sensiblement exempt de plastiques, est soumis à un séchage par vibration à une température de 250-350 °C avec séparation des impuretés de grain fin par aspiration, et le matériau séché et préalablement purifié comprenant un déchet de verre est soumis à un traitement abrasif mécanique dans une machine de désétiquetage, par déplacement du matériau comprenant le déchet de verre en utilisant des palettes en rotation disposées sur un arbre commun, puis la fraction de sous-grain d'une taille inférieure à 3 mm est séparée, ladite fraction de sous-grain constituant intégralement des déchets, et les particules déclassées supérieures constituant un déchet de verre purifié sont dirigées vers un triage par couleur, où lors du tamisage du matériau contenant un déchet de verre et durant le transfert du déchet de verre purifié vers le triage par couleur une aspiration des particules de papier est réalisée, et le déchet de verre purifié est soumis à un triage par couleur en deux étapes en utilisant un trieur optoélectronique, où lors de la première étape du triage à partir du déchet de verre purifié un courant de déchet de verre principal est isolé, celui-ci comprenant essentiellement un déchet de verre d'une première couleur avec des impuretés de pierres et de céramiques et un déchet de verre d'une deuxième et d'une troisième couleur, et un courant de déchet de verre secondaire comprenant essentiellement un déchet de verre de la deuxième et de la troisième couleur, ainsi qu'un courant de déchet comprenant essentiellement des pierres et des céramiques, puis le courant principal de déchet de verre est introduit dans la seconde étape de triage pour séparer les impuretés résiduelles de pierres, de céramiques et de verre de la deuxième et de la troisième couleur, pour obtenir une fraction de déchet de verre de 3-10 mm de la première couleur d'une qualité de matière première pour verre et sensiblement homogène en termes de couleur de verre.
PCT/PL2012/000071 2012-07-09 2012-08-23 Procédé de séparation d'une fraction de 3-10 mm d'un déchet de verre d'une qualité de matière première pour verre et sensiblement homogène en termes de couleur de verre WO2014011061A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL399879A PL226090B1 (pl) 2012-07-09 2012-07-09 Sposob wyodrebniania frakcji 3-10 mm stluczki szklanej o jakosci surowca szklarskiego i zasadniczo jednorodnej pod wzgledem barwy szkla
PLP399879 2012-07-09

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WO2014011061A1 true WO2014011061A1 (fr) 2014-01-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112676166A (zh) * 2021-01-13 2021-04-20 中建材蚌埠玻璃工业设计研究院有限公司 废玻璃干法自动分选干燥后细选处理系统
JP2021109122A (ja) * 2020-01-08 2021-08-02 有限会社大原ガラスリサイクル ガラスリサイクル方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111842206B (zh) * 2020-06-28 2021-10-08 北新集团建材股份有限公司 一种板材质量检测方法

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WO1998025860A1 (fr) 1996-12-13 1998-06-18 Sandvik Aktiebolag (Publ) Procede et appareil permettant d'eliminer des odeurs et des matieres polluantes au cours de la preparation de verre de recuperation destine a etre utilise dans un filtre a lit electrostatique
WO1999031022A1 (fr) 1996-07-18 1999-06-24 G R Technology, Inc. Procede de recyclage de gresil colore melange pour produire du verre ambre, du verre vert ou du flint-glass
US5950936A (en) * 1998-01-21 1999-09-14 Bergart; David Process and system for recycling glass
GB2389545A (en) * 2002-06-12 2003-12-17 Cumbria Crushing & Recycling L Process for the production of clean glass particles from recycled glass
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WO2006017285A2 (fr) 2004-07-13 2006-02-16 Casella Waste Systems, Inc. Systèmes et procédés pour trier des déchets recyclables dans une usine de recuperation de matériaux
WO2006055238A2 (fr) 2004-11-12 2006-05-26 Casella Waste Systems, Inc. Systeme et procede de caracterisation et certification de groisil de couleurs melangees fournissant un groisil de couleurs melangees colore uniformement et sans contaminant
EP1890798B1 (fr) * 2005-05-25 2009-02-25 Binder + Co. Aktiegesellschaft Dispositif pour eliminer les etiquettes sur du verre usage

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US3650396A (en) * 1970-11-18 1972-03-21 Sortex North America Refuse separating and sorting method and apparatus
EP0461616A2 (fr) * 1990-06-15 1991-12-18 Hubertus Exner Procédé et dispositif de tri de déchets de verre
WO1999031022A1 (fr) 1996-07-18 1999-06-24 G R Technology, Inc. Procede de recyclage de gresil colore melange pour produire du verre ambre, du verre vert ou du flint-glass
WO1998025860A1 (fr) 1996-12-13 1998-06-18 Sandvik Aktiebolag (Publ) Procede et appareil permettant d'eliminer des odeurs et des matieres polluantes au cours de la preparation de verre de recuperation destine a etre utilise dans un filtre a lit electrostatique
US5950936A (en) * 1998-01-21 1999-09-14 Bergart; David Process and system for recycling glass
GB2389545A (en) * 2002-06-12 2003-12-17 Cumbria Crushing & Recycling L Process for the production of clean glass particles from recycled glass
US20040251178A1 (en) * 2002-08-12 2004-12-16 Ecullet Method of and apparatus for high speed, high quality, contaminant removal and color sorting of glass cullet
WO2005016835A2 (fr) 2003-08-06 2005-02-24 Ecullet Procede et appareil permettant une elimination rapide et de haute qualite des contaminants et un tri selon les couleurs du casson de verre
WO2006017285A2 (fr) 2004-07-13 2006-02-16 Casella Waste Systems, Inc. Systèmes et procédés pour trier des déchets recyclables dans une usine de recuperation de matériaux
WO2006055238A2 (fr) 2004-11-12 2006-05-26 Casella Waste Systems, Inc. Systeme et procede de caracterisation et certification de groisil de couleurs melangees fournissant un groisil de couleurs melangees colore uniformement et sans contaminant
EP1890798B1 (fr) * 2005-05-25 2009-02-25 Binder + Co. Aktiegesellschaft Dispositif pour eliminer les etiquettes sur du verre usage

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021109122A (ja) * 2020-01-08 2021-08-02 有限会社大原ガラスリサイクル ガラスリサイクル方法
JP7343400B2 (ja) 2020-01-08 2023-09-12 有限会社大原ガラスリサイクル ガラスリサイクル方法
CN112676166A (zh) * 2021-01-13 2021-04-20 中建材蚌埠玻璃工业设计研究院有限公司 废玻璃干法自动分选干燥后细选处理系统

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PL226090B1 (pl) 2017-06-30

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