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WO2012176160A1 - Procédé et dispositif pour traiter des cendres de grille - Google Patents

Procédé et dispositif pour traiter des cendres de grille Download PDF

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Publication number
WO2012176160A1
WO2012176160A1 PCT/IB2012/053163 IB2012053163W WO2012176160A1 WO 2012176160 A1 WO2012176160 A1 WO 2012176160A1 IB 2012053163 W IB2012053163 W IB 2012053163W WO 2012176160 A1 WO2012176160 A1 WO 2012176160A1
Authority
WO
WIPO (PCT)
Prior art keywords
bottom ashes
washing
washing stage
water
ashes
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/IB2012/053163
Other languages
English (en)
Inventor
Paolo Bevilacqua
Paolo AVANZI
Paolo BELVIOLANDI
Francesco POVIANI
Laura POVIANI
Fulvio RONCARI
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.)
ENVIROTECH Srl
Aprica SpA
Original Assignee
ENVIROTECH Srl
Aprica SpA
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 ENVIROTECH Srl, Aprica SpA filed Critical ENVIROTECH Srl
Priority to EP12745535.0A priority Critical patent/EP2723499A1/fr
Publication of WO2012176160A1 publication Critical patent/WO2012176160A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to the treatment of bottom ashes deriving from combustion apparatuses and in particular to a treatment method and an apparatus that provide for washing bottom ashes with water.
  • bottom ashes can be advantageously re-used as inert building materials, provided that they are subjected to treatments suitable to eliminate the main polluting substances they contain, in particular heavy metals such as Cu, Cr, Pb, Zn, Sb and Mo, and salts such as chlorides and sulfates.
  • Bottom ashes in fact have good technical properties that allow their use in civil construction works such as road surfaces and noise barriers.
  • bottom ashes can be used as inert materials in the production of cement, concrete and aggregates, as well as waste covering materials at landfills.
  • the treatment of bottom ashes comprises their aging by way of carbonation with C0 2 , which causes the precipitation of certain polluting substances contained in them in the form of insoluble carbonates, in particular heavy metals.
  • Aging is generally combined with grinding and screening of bottom ashes, as well as with the recovery, by separation, of metallic materials contained in them, as is typically the case of municipal solid waste.
  • bottom ashes are regulated by national laws and standards, such as e.g. the Italian Ministerial Decree 186/2006 and its subsequent amended versions, which establish limits on the leaching of pollutants from bottom ashes when in contact with water.
  • Water washing is used primarily to remove components highly soluble in water, such as, for example, salts, heavy metals and unburaed residues of organic substances, thus considerably limiting the leaching of these pollutants during the use of bottom ashes as inert building materials or as landfill coating materials, which could cause significant damages to structures and people as well as to the surrounding environment.
  • washing In order to obtain bottom ashes meeting the existing standards in terms of leaching of polluting substances, washing must be carried out by using rather high weight ratios between fresh water and bottom ashes, which are about 3:1, so that once washing is finished waste water discharged into sewage systems or surface waters has a content of pollutants, chlorides in particular, within the limits established by the standards. Thus, for example, in order to reuse a ton of bottom ashes, about 3 m 3 of fresh water are needed.
  • An idea of solution underlying the present invention is to divide the water washing treatment of bottom ashes in two distinct washing stages in every one of which washing is combined with at least one screening step and at least one step of slime removal and hydrocyclone treatment.
  • the water used to wash the bottom ashes is continuously recirculated after a step of clariflocculation with chemical treatment, and fresh water for rinsing bottom ashes is used only in the second washing stage.
  • the bottom ashes held by screening in the first washing stage are subjected to a grinding step before the second washing stage.
  • An advantage offered by the invention is that the grinding step between the two washing stages provides the bottom ashes with a grain size corresponding to the requirements of the leaching tests according to the present standards in the field, whereby it is possible to check the compliance of the treated bottom ashes to the requirements of the standards directly at the outlet of the apparatus, without subjecting them to further grinding steps that might release further polluting substances.
  • Another advantage offered by the invention is that between the two washing stages a step of separation and recovery of metallic ferrous and non ferrous materials is carried out.
  • the provision of a separation step of metallic materials between the two washing stages allows to recover almost the total amount of metallic materials present in the bottom ashes, because they have a suitable size for the separation thanks to the grinding step that precedes the first washing stage and to the screening step carried out in the first washing stage.
  • the metal materials that are separated and recovered are substantially free of the main pollutants that characterize bottom ashes, which considerably improves their quality in view of their subsequent use.
  • the separation of metallic materials may be advantageously combined with the screening of bottom ashes, thus allowing to optimize the recovery process depending on the grain size of the bottom ashes coming out from the first washing stage.
  • Still another advantage offered by the invention is that the water subjected to clariflocculation and treatment that is made to recirculate in the second washing stage may be fed back to the first washing stage in order to compensate for possible apparatus losses.
  • FIG. 1 is a block diagram schematically showing the main sections of the apparatus according to the invention.
  • FIG. 2 is a block diagram schematically showing the first washing stage of the apparatus according to the invention.
  • FIG. 3 is a block diagram schematically showing the second washing stage of the apparatus according to the invention.
  • FIG. 4 is a block diagram schematically showing the separation section of the metallic materials of the apparatus according to the invention.
  • the treatment method according to the invention comprises an initial step of storing and aging of bottom ashes in a section S 1.
  • the ashes deriving from combustion apparatuses for example, from an incineration apparatus of municipal solid waste, are stored in piles and exposed for a predetermined period of time to atmospheric agents.
  • the contact with carbon dioxide and moisture promotes a series of chemical reactions of carbonation which cause the precipitation of some contaminants as insoluble carbonates, especially heavy metals, thus reducing the environmental risks associated with the future disposal and/or reuse of the bottom ashes.
  • aging reduces the risk of incrustation and deposits in machinery intended to carry out washing of the bottom ashes, as it causes the precipitation of elements such as calcium in the form of carbonates.
  • the aging carried out by simple exposure to atmospheric agents generally requires times ranging between 90 and 180 days.
  • accelerated aging processes may be used, wherein the bottom ashes are wetted by irrigation and treated with flows of carbon dioxide.
  • Aged bottom ashes are typically handled by way of buckets moved by overhead cranes and fed to a loading hopper of the treatment apparatus. Alternatively, the bottom ashes may be collected and handled by wheel loaders.
  • the bottom ashes so loaded are fed to a section S2 wherein they are subjected to a grinding step in a shredder/crusher e.g. provided with counter-rotating shafts, by which they are dimensionally reduced to a grain size suitable for washing, for example lower than 200 mm.
  • the ground ashes are collected on a conveyor belt and sent to the washing.
  • the grinding step also results in a uniform distribution of the ashes on the conveyor belt arranged downstream of the shredder/crusher, which allows to measure and accurately adjust the flow of ashes fed to the washing stage, for example by a weighing system comprising load cells applied to the conveyor belt.
  • the washing of bottom ashes is divided into two distinct stages, respectively indicated as S3 and S4, in every one of which washing is combined with at least one screening stage and one step of slime removal and hydrocyclone treatment. Moreover, between the two washing stages bottom ashes are subjected to a further grinding step.
  • the ground ashes travelling on the conveyor belt are loaded into a washer 31 and dragged in its interior by means of a water flow.
  • the weight ratio between water and bottom ashes in the first washing stage S3 is very high, for example corresponding to about 3 to 5: 1, which allows to dissolve almost the total amount of salts.
  • a lighter fraction mainly consisting of unburned organic substances and mineral formations that have, for example, a lower density than water, floats and is carried away by the water flow, and can thus be separated from the bottom ashes.
  • the water is preferably made to circulate in countercurrent with respect to the feeding direction of the bottom ashes, which allows to separate the lighter fraction more easily.
  • the washer 31 is preferably of the type comprising a rotary drum, wherein the rotary drum is provided ith a plurality of vanes that allow to establish washing mechanisms that are based not only on the passage of the contaminants into solution, but also on a series of mechanical interactions among the particles of the ashes, such as friction, abrasion, impacts, and the like.
  • the lighter fraction separated by the washer 31 is fed to a vibrating sieve 32.
  • the vibrating sieve 32 is configured to hold unburned organic substances, which are collected on a conveyor belt (not shown) and transported to a suitable storage container.
  • the mineral formations and the water that instead pass through the meshes of the vibrating sieve 32 are fed e.g. by gravity to a group 33 of slime removal and hydrocyclone treatment, which allows their recovery in the form of fine sands, for example having a grain size lower than or equal to 2 mm.
  • the group 33 of slime removal and hydrocyclone treatment may comprise an attrition cell 33a and spiral gravimetric separators 33b, which allow to further wash the mixture of water and sand separated by the hydrocyclone.
  • the attrition cell 33a subjects the mixture of water and sand to a strong agitation so as to promote impacts and friction among the particles, which prolong the mechanical separating action of the pollutants.
  • the mixture of sand and water that comes out from the attrition cell 33a flows e.g. by gravity in the spiral gravimetric separators 33b, which allow the separation and removal of the residues of organic fractions and light mineral fractions that contain most of the pollutants from the recoverable inert materials thanks to the combined effect of centrifugal force and gravity.
  • the residues of organic fractions and light mineral fractions coming out from the spiral gravimetric separators that have a grain size lower than 2 mm are dried on a vibrating dryer 34 and subsequently stored in order to be disposed.
  • the remaining inert fraction having a grain size lower than or equal to 2 mm is instead sent to a vibrating dryer 36 together with the inert materials having a grain size lower than or equal to 4 mm coming from the screening and subsequently stored to be recovered.
  • the water recovered by the vibrating dryer 34 is fed back to the group 33 of slime removal and hydrocyclone treatment, thus allowing to recover further organic and mineral fractions.
  • a screening group 35 is also arranged, which comprises a plurality of sieves the meshes of which have a progressively smaller size suitable to treat the heavier materials that pass through the washer 31 and that are separated from the unburned organic materials and the lighter mineral fractions.
  • the screening group 35 is preferably configured to hold fractions of the washed ashes having a grain size greater than 4 mm.
  • the sieves of the screening group 35 may advantageously be integrated in the washer 31.
  • the inert materials collected downstream of the screening group 35 and those coming from the group 33 of slime removal and hydrocyclone treatment are sent to the vibrating dryer 36 and then stored in a special container. Also in this case the water recovered from vibrating dryer 36 is fed back to the group 33 of slime removal and hydrocyclone treatment.
  • All the water used for washing the bottom ashes in the first washing stage S3 is made to recirculate on a continuous base, i.e. once started the apparatus the first washing stage S3 does not require any supply of fresh water during its operation.
  • the recirculation path of the water in the first washing stage S3 is indicated in figure 2 by way of dashed lines.
  • the apparatus In order to recirculate the muddy water, i.e. the water containing a fine mineral fraction, it is necessary to provide a suitable step of clariflocculation with chemical treatment.
  • the apparatus comprises a clariflocculation group 37 and a tank 38 for chemical treatment to which the water coming out from the group 33 of slime removal and hydrocyclone treatment and from the vibrating dryers 34 and 36 is sent.
  • the clariflocculation group 37 a process of clariflocculation of the water is carried out, which also allows to recover dehydrated sludge.
  • the dehydrated sludge which has a moisture content of about 40%, contains most of the salts present in solution in the water used to wash the bottom ashes and may be recovered for the production of cement in cement factories.
  • the water subjected to the clariflocculation process is collected in a storage tank 38 wherein a chemical treatment is carried out by dosing additives for adjusting pH and for precipitating polluting substances, in particular heavy metals, as well as by dosing anti-foaming and anti- fouling agents.
  • the first washing stage S3 allows to treat the 100% of the bottom ashes and to separate about the 8% in the form of dehydrated sludge, about the 22 % in the form of inert materials with a grain size lower than 4 mm and about the 20% in the form of metallic materials, whose separation mode will be discussed later.
  • the remaining 50% of the bottom ashes is sent to the second washing stage S4.
  • the inert materials recovered in the first washing stage S3 have a concentration of pollutants, especially chlorides and organic compounds (evaluated through the COD, i.e. Chemical Oxygen Demand, parameter), slightly higher than the limits set by the leaching test, but lower than the limits established by the UNI- EN field standards for the reuse as inert construction materials.
  • the bottom ashes held by the sieves of the screening group 35 of the first washing stage S3 are subjected to a further grinding step in order to provide them with a grain size within the limits set by the leaching test required by the standards, in particular a grain size lower than or equal to 4 mm.
  • This further grinding step is carried out in a section S5 of the apparatus.
  • the bottom ashes further dimensionally reduced are then sent to the second washing stage S4.
  • the grinding of the bottom ashes carried out prior to the second washing stage S4 allows to separate more polluting elements and salts that can thus be effectively eliminated by the second washing.
  • the second washing stage S4 similarly to the first washing stage S3 also the second washing stage S4 comprises a washer 41, such as a rotary drum washer as in the first washing stage S3, downstream of which there are arranged a sieve 42, which allows to hold possible residues having a grain size greater than 4 mm, and a group 43 of slime removal and hydrocyclone treatment that allows to separate the lighter mineral fraction coming out from the washer 41.
  • a washer 41 such as a rotary drum washer as in the first washing stage S3
  • a sieve 42 which allows to hold possible residues having a grain size greater than 4 mm
  • a group 43 of slime removal and hydrocyclone treatment that allows to separate the lighter mineral fraction coming out from the washer 41.
  • the bottom ashes having a grain size greater than 4 mm held by screening may advantageously be fed back upstream of the first washing stage S3, thus allowing a new washing and a new grinding thereof.
  • the inert materials with a grain size lower than or equal to 4 mm recovered through the group 43 of slime removal and hydrocyclone treatment are sent to a vibrating dryer 44 and then stored in a special container.
  • the water used in the washer 41 is preferably made to circulate in countercurrent with respect to the feeding direction of the bottom ashes, thus allowing to remove the pollutants more effectively.
  • the weight ratio between water and bottom ashes is lower than that of the first stage S3 and equal to about 2:1, which is possible because, as explained above, the bottom ashes fed to the second washing stage S4 are about the 50% of those loaded in the apparatus.
  • a part of the water used in the second washing stage S4 is fresh water, which is exclusively fed to the second washing stage S4 of the apparatus with a weight ratio of about 1:1 with respect to the bottom ashes treated therein.
  • the weight ratio between fresh water and bottom ashes is therefore about 0.5:1, i.e. nearly one-sixth of the weight ratio that is typical of a washing apparatus of a traditional type, which ratio characterizes the apparatus according to the invention.
  • the source (not shown) of fresh water that feeds the washer 41 of the second washing stage S4 may also be connected to the sieve 42 and possibly also to the vibrating dryer 44, thus allowing to carry out a further washing or rinsing of the inert materials before their collection.
  • the second washing stage S4 comprises a clariflocculation group 45 similar to the clariflocculation group 37 of the first washing stage S3. Also in this case dehydrated sludge are recovered, which contain residues of salts and polluting substances present in the ashes subjected to the second washing stage.
  • the overflow waters are subjected to a chemical-physical treatment with flocculation, addition of additives for pH adjustment and precipitation of heavy metals and subsequent clariflocculation.
  • the overflow water can also be subjected to a biological treatment preferably by way of activated sludge.
  • a step of sand filtration with quartzite filters which serves to further ensure compliance of overflow water with the limits set by the standards as to suspended solids.
  • the second washing stage S4 allows to treat the remaining 50% of bottom ashes and to recover approximately the 45% in the form of inert materials with a grain size lower than 4 mm and about the 5% in the form of dehydrated sludge.
  • the inert materials recovered in the second washing stage S4 have pollutant concentrations below the values set by the UNI-EN standards for reuse as inert building materials and within the limits established by the leaching test at national level.
  • a section S6 adapted to allow separation of metallic materials which may be present in the bottom ashes may be arranged between the first and the second washing stages S3 and S4. This is typically the case of bottom ashes deriving from a combustion apparatus of municipal solid waste.
  • section S6 is also arranged upstream of the further grinding section S5,
  • the separation of metallic materials carried out between the first and the second washing stages allows to recover metallic materials that have been washed and are thus substantially free from the pollutants present in the bottom ashes.
  • separation is carried out on bottom ashes already subjected to grinding and therefore having a smaller size with respect to the bottom ashes present at the inlet of the apparatus, for example a size lower than 200 mm that is more suitable for the separation.
  • the section S6 for the separation of metallic materials comprises at least one treatment line connected to the first washing stage S3 downstream of the screening group 35.
  • the treatment line is provided with at least one magnetic separator 61 and/or at least one eddy current separator 62, for example of the type comprising a conveyor belt, arranged in series, and a possible further magnetic separator 63, for example of the rotary drum type, arranged therebetween and adapted to collect weakly magnetic materials.
  • the screening group 35 of the first washing stage S3 comprises a number of sieves that hold fractions having a progressively smaller grain size, it is possible and advantageous to carry out the separation of metallic materials on parallel treatment lines that are respectively connected downstream of each sieve of the screening group 35 of the first washing stage S3.
  • a grinding step of non-metallic materials having a grain size greater than 40 mm may also be advantageously provided, which is carried out by means of a crusher 64 arranged downstream of the magnetic separator 61 of the first separation line of metallic materials, thus allowing their washing and recirculation in the washer of the first washing stage.
  • This mode of separating metallic materials in parallel is particularly advantageous, because it is well known that the magnetic and eddy current separators are all the more effective the more uniform is the size of the materials to be separated.
  • the inert non-metallic materials collected downstream of the section S6 of separation of metallic materials are fed to the grinding section S5 and then to the second washing stage S4.
  • the water made to recirculate which is clarified and accumulated in the second washing stage S4, may be fed to the first washing stage in order to compensate for possible water losses of the apparatus.
  • a by-pass line that allows to recover a certain amount of inert materials with a grain size greater than 4 mm before the grinding step carried out in the section S5 that precedes the second washing stage S4.
  • possible metal fractions resulting from the grinding of the bottom ashes in section S5 between the first and the second washing stages S3, S4 may be fed back to the section S6 for the separation of metallic materials and separated therein by way of a suitable magnetic separator 61.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne un procédé pour traiter des cendres de grille issuesde processus de combustion, ledit procédé comprenant une étape de stockage et de vieillissement de cendres de grille et une étape de broyage des cendres de grille stockées et vieillies, de même qu'une étape subséquente de nettoyage hydraulique desdites cendres de grille stockées et vieillies. L'étape de nettoyage hydraulique est divisée en deux niveaux de lavage distincts dans chacun desquels le nettoyage hydraulique est combiné à au moins une étape de criblage et une étape d'élimination de la boue de sable et de traitement en hydrocyclone et entre lesquelles intervient une autre étape de broyage des cendres de grille retenues par criblage dans le premier étage de nettoyage. L'eau utilisée pour laver les cendres de grille est destinée à circuler en continu dans chaque étage de lavage après une étape de clarifloculation par traitement chimique et de l'eau douce est acheminée uniquement jusque dans le second étage de nettoyage. Ces caractéristiques permettent de réduire la teneur en substances polluantes contenues dans les cendres de grille, dans le cadre des limites fournies par les présentes normes concernant le réemploi de matériaux inertes par utilisation de quantités nettement plus réduites d'eau douce que celles utilisées dans les appareils de traitement de cendres de grille connus, fondés sur le nettoyage hydraulique. L'invention porte également sur un dispositif conçu pour mettre ledit procédé en œuvre.
PCT/IB2012/053163 2011-06-23 2012-06-22 Procédé et dispositif pour traiter des cendres de grille Ceased WO2012176160A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12745535.0A EP2723499A1 (fr) 2011-06-23 2012-06-22 Procédé et dispositif pour traiter des cendres de grille

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2011A001141 2011-06-23
IT001141A ITMI20111141A1 (it) 2011-06-23 2011-06-23 Metodo ed impianto di trattamento di ceneri pesanti

Publications (1)

Publication Number Publication Date
WO2012176160A1 true WO2012176160A1 (fr) 2012-12-27

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Application Number Title Priority Date Filing Date
PCT/IB2012/053163 Ceased WO2012176160A1 (fr) 2011-06-23 2012-06-22 Procédé et dispositif pour traiter des cendres de grille

Country Status (3)

Country Link
EP (1) EP2723499A1 (fr)
IT (1) ITMI20111141A1 (fr)
WO (1) WO2012176160A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017019579A1 (fr) * 2015-07-25 2017-02-02 Tav Holdings, Inc. Système et procédé de récupération de matériaux désirés à partir de fines dans des cendres d'incinérateur
DE102016106053A1 (de) * 2016-04-03 2017-10-05 Schauenburg Maschinen- Und Anlagen-Bau Gmbh Verfahren und Anlage zur Aufbereitung von Asche aus Müllverbrennungsanlagen
DE102016106054A1 (de) * 2016-04-03 2017-10-05 Schauenburg Maschinen- Und Anlagen-Bau Gmbh Verfahren und Anlage zur Aufbereitung von Asche aus Müllverbrennungsanlagen
WO2020124207A1 (fr) * 2018-12-18 2020-06-25 Sepro Mineral Systems Corp. Récupération de matériau à partir de cendres résiduelles d'incinérateur humide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212682A (en) * 1978-03-13 1980-07-15 James River Hydrate & Supply Co., Inc. Process and apparatus for producing an aggregate material from bottom ash
US20060005749A1 (en) * 2004-07-07 2006-01-12 Kobin Environmental Enterprise Co., Ltd. Process for washing and sorting solid residues generated from solid wastes incinerator
WO2007126215A1 (fr) * 2006-04-28 2007-11-08 Ceragreen Co., Ltd. Procédé de fabrication d'un agrégat artificiel léger contenant de la cendre résiduelle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212682A (en) * 1978-03-13 1980-07-15 James River Hydrate & Supply Co., Inc. Process and apparatus for producing an aggregate material from bottom ash
US20060005749A1 (en) * 2004-07-07 2006-01-12 Kobin Environmental Enterprise Co., Ltd. Process for washing and sorting solid residues generated from solid wastes incinerator
WO2007126215A1 (fr) * 2006-04-28 2007-11-08 Ceragreen Co., Ltd. Procédé de fabrication d'un agrégat artificiel léger contenant de la cendre résiduelle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017019579A1 (fr) * 2015-07-25 2017-02-02 Tav Holdings, Inc. Système et procédé de récupération de matériaux désirés à partir de fines dans des cendres d'incinérateur
US10894258B2 (en) 2015-07-25 2021-01-19 Tav Holdings, Inc. System and method for recovering desired materials and producing clean aggregate from incinerator ash
DE102016106053A1 (de) * 2016-04-03 2017-10-05 Schauenburg Maschinen- Und Anlagen-Bau Gmbh Verfahren und Anlage zur Aufbereitung von Asche aus Müllverbrennungsanlagen
DE102016106054A1 (de) * 2016-04-03 2017-10-05 Schauenburg Maschinen- Und Anlagen-Bau Gmbh Verfahren und Anlage zur Aufbereitung von Asche aus Müllverbrennungsanlagen
WO2020124207A1 (fr) * 2018-12-18 2020-06-25 Sepro Mineral Systems Corp. Récupération de matériau à partir de cendres résiduelles d'incinérateur humide

Also Published As

Publication number Publication date
EP2723499A1 (fr) 2014-04-30
ITMI20111141A1 (it) 2012-12-24

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