EP3586995B2 - Procédé de préparation d'un mélange de sable de fonderie - Google Patents

Procédé de préparation d'un mélange de sable de fonderie Download PDF

Info

Publication number
EP3586995B2
EP3586995B2 EP18180868.4A EP18180868A EP3586995B2 EP 3586995 B2 EP3586995 B2 EP 3586995B2 EP 18180868 A EP18180868 A EP 18180868A EP 3586995 B2 EP3586995 B2 EP 3586995B2
Authority
EP
European Patent Office
Prior art keywords
cleaning water
sand
moulding
foundry sand
mixture
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.)
Active
Application number
EP18180868.4A
Other languages
German (de)
English (en)
Other versions
EP3586995A1 (fr
EP3586995B1 (fr
Inventor
Alexander MOKRE
Mark ENSINGER
Walter Hartl
Viktoria DARGAI
Bettina RITT
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.)
Nemak SAB de CV
Original Assignee
Nemak SAB de CV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=62837769&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3586995(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nemak SAB de CV filed Critical Nemak SAB de CV
Priority to HUE18180868A priority Critical patent/HUE054926T2/hu
Priority to EP18180868.4A priority patent/EP3586995B2/fr
Priority to PL18180868T priority patent/PL3586995T3/pl
Priority to ES18180868T priority patent/ES2874204T3/es
Priority to JP2020572871A priority patent/JP2021529667A/ja
Priority to KR1020207036136A priority patent/KR20210010908A/ko
Priority to MX2020014218A priority patent/MX2020014218A/es
Priority to US17/256,280 priority patent/US11707777B2/en
Priority to PCT/IB2019/055584 priority patent/WO2020003277A1/fr
Priority to CN201980043992.7A priority patent/CN112512723A/zh
Priority to BR112020026856-9A priority patent/BR112020026856B1/pt
Publication of EP3586995A1 publication Critical patent/EP3586995A1/fr
Publication of EP3586995B1 publication Critical patent/EP3586995B1/fr
Publication of EP3586995B2 publication Critical patent/EP3586995B2/fr
Application granted granted Critical
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/18—Plants for preparing mould materials
    • B22C5/185—Plants for preparing mould materials comprising a wet reclamation step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/0463—Plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/0472—Parts; Accessories; Controlling; Feeding; Discharging; Proportioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/10—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by dust separating

Definitions

  • the invention relates to a method for recovering molding sand from a foundry sand mixture which comprises at least a proportion of molding material fragments or loose molding material grains which accrue when a casting is removed from a mold as a result of the destruction of casting cores or molded parts which represent the casting and which have been formed from the molding sand (F) and an inorganic binder and one or more additives for adjusting the properties of the molding material.
  • the foundry sand mixture is mixed with cleaning water to form a slurry in order to dissolve the inorganic binder residues contained in the foundry sand mixture and any additives present from the molding sand and to rinse them out of the foundry sand mixture.
  • the cleaning water contaminated with the inorganic binder residues is then separated from the molding sand contained in the slurry.
  • Such a procedure is known, for example, from WO 2007/082747 A1 known, whereby this method is particularly suitable for the preparation of foundry sand mixtures in which an inorganic binder, in particular a water glass binder, is present.
  • the casting cores or molded parts that arise when a casting is demolded from a so-called "lost" mold, i.e. a mold that was destroyed during demolding, are mechanically crushed.
  • a suspension is formed from the crushed fragments by adding water. This is followed by separation of the components of the suspension.
  • a new ready-to-use core or molding sand mixture is prepared from the molding sand obtained during the separation.
  • the initial crushing of the core and molded part fragments is intended to separate as far as possible from the molding sand grains any impurities that adhere to the molding sand grains from which the cores and molded parts in question were formed.
  • the impurities contained therein can be removed and the individual components of the mixture can be fed to their respective intended further processing.
  • Another known document of the state of the art is the DE102005041519 .
  • the invention has solved this problem by the method specified in claim 1.
  • the process temperature of the slurry formed from the cleaning water and the foundry sand mixture in step a) is now 80 - 100 °C.
  • the temperature window specified by the invention is set in such a way that the processing of the foundry sand mixture can be integrated into a water- and energy-saving cycle.
  • the invention allows the process temperature and the process times to be coordinated in such a way that the foundry sand produced can be effectively processed at minimal cost. Practical tests have shown that at process temperatures within a temperature range of 80 - 100 °C, the separation of the molding sand from the inorganic binder can be carried out in particularly short process times. For example, the mixing of the foundry sand mixture with the cleaning water to form a slurry and the associated dissolving and rinsing of the inorganic binder residues (step a) of the process according to the invention) can typically be completed within 5 min - 60 min.
  • this crushing does not primarily serve to separate binder residues from the molding sand grains, but rather to increase the attack surface for the cleaning water as much as possible in order to accelerate the dissolution of the binder when the foundry sand mixture is mixed with the cleaning water.
  • the foundry sand mixture intended for the processing according to the invention contains predominantly coarse fragments
  • All devices known from the state of the art for this purpose are suitable for the mechanical comminution of the foundry sand mixture, such as a lump breaker or the like.
  • waste heat is available from another process section of the method according to the invention or from a process in the plant in which the method according to the invention is also used, which would otherwise remain unused, it can be expedient, with a view to minimizing the effort required for the temperature control provided according to the invention, to preheat the foundry sand mixture before mixing it with the cleaning water.
  • the heating devices provided for heating the cleaning water or the slurry to the respective process temperature can be designed for low outputs and can be implemented and operated at correspondingly low costs.
  • the contaminated cleaning water from step b) can be used to heat the fresh water.
  • the contaminated cleaning water can be passed through a heat exchanger in which heat is transferred from the contaminated cleaning water to fresh cleaning water without the contaminated and fresh cleaning water mixing.
  • the contaminated water is used for another run through step a). This reuse is repeated until the solubility of the binder in the contaminated water is reached, i.e. so much binder is dissolved in the water that no more binder can be dissolved, or the proportion of suspended matter predominates, i.e. the contamination of the water with foreign bodies carried in it has increased so much that rinsing the molding sand with the contaminated water no longer has a cleaning effect.
  • the foundry sand mixture to be processed can pass through a heat exchanger before step a), through which contaminated and still warm cleaning water separated from the molding sand in step b) is passed in order to preheat the foundry sand mixture.
  • This variant is useful if the cleaning water obtained in step b), which may have been reused several times beforehand, is so contaminated that it is no longer advisable to reuse it.
  • the fresh cleaning water supplied in each case can also be heated by means of an additional heat source, such as by means of a continuous flow heater or the like, in such a way that the slurry formed in step a) by mixing with the foundry sand mixture, which is also optionally preheated, reaches a process temperature which lies in the range prescribed according to the invention.
  • an additional heat source such as by means of a continuous flow heater or the like
  • the molding sand obtained from the foundry sand mixture, freed from the binder and other residues, can be dried in the usual way, dedusted if necessary and divided into different grain size classes.
  • the molding sand is to be used for a wider range of applications, in particular those for which molding materials with organic binders are to be provided, the molding sand is subjected to an additional treatment after the separation of the residues of the inorganic binder according to the invention (step b)) in which its pH value is adjusted to values of 7 - 8 -, whereby if the molding sand obtained in step b) is to be used for molding materials with an organic binder, the pH value of the molding sand is adjusted to 7 - 8.
  • the molding sand is rinsed or wetted with a neutralizing solution.
  • a neutralizing solution such as water-diluted hydrochloric acid, sulfuric acid or organic acids (carbonic acid, citric acid) are suitable as neutralizing solutions.
  • buffer substances such as carbonate buffers (e.g. sodium hydrogen carbonate) can also be used for neutralization.
  • the molding sand can be mixed with the neutralizing solution.
  • Stirring devices and the like are available on the market for this purpose.
  • the molding sand can undergo a rinsing step to remove excess neutralizing solution.
  • the molding sand obtained in step b) and adjusted in terms of its pH value can be subjected to mechanical dewatering.
  • the molding sand can be placed on sieves, for example, through which liquid residues in the molding sand drip while the molding sand grains are retained, or presses, drying belts and the like are used, which are available in the state of the art for this purpose, in order to mechanically expel moisture from a free-flowing mass that is comparable to the molding sand obtained according to the invention.
  • Mechanical dewatering can reduce the effort that may be required to dry the molding sand before it is further processed into molding material.
  • the molding sand obtained according to the invention must be sufficiently dry.
  • the molding sand obtained in step b) can be dried by supplying heat, with typical drying temperatures being in the range of 80 - 800 °C.
  • drying temperatures of less than 500 °C, in particular 100 - 300 °C, are suitable, with temperatures of 200 - 250 °C being particularly practical.
  • foundries produce foundry sands which, in addition to a portion that comes from casting cores or molded parts made of molding materials with inorganic binders, also contain a portion of fragments or grains of casting cores or molded parts that have been formed from a molding material that has been formed from the molding sand and an organic binder and one or more additives to adjust the properties of the molding material.
  • the residues of the organic binder that have not been dissolved from the molding sand grains by the work steps a) and b) of the method according to the invention can be removed by an annealing treatment in which the molding sand present after work step b) is heated to such an extent that the organic binder residues burn off.
  • this annealing treatment can also be carried out during the drying step.
  • the molding sand obtained by the processing according to the invention can be subjected to a classification in which it is divided depending on the size of its grains. At the same time, the molding sand can be dedusted in order to ensure its optimal suitability for the production of molding material.
  • the figure shows a schematic of a workflow in the preparation of a foundry sand mixture, as typically occurs in a foundry in which cast parts (not shown here), such as components for vehicles, are produced in a conventional manner from a light metal melt, in particular an Al or Al alloy melt, using casting molds (also not shown here).
  • casting molds include casting cores or molded parts that are made from a molding compound that contains a molding sand that has been tried and tested in practice and an equally tried and tested inorganic binder, such as water glass.
  • the binder is activated in the usual way by applying heat in order to ensure that the molding sand grains hold together in a dimensionally stable manner.
  • Another part of the casting molds contains casting cores or molded parts that are made from a molding compound that contains a molding sand that has been tried and tested in practice and an organic binder that has also been tried and tested.
  • a chemical reaction of the binder is caused by the addition of a reaction medium, such as a gas, through which the binder develops its solidifying effect and ensures that the grains of the molding sand hold together in a dimensionally stable manner.
  • the moulding material fragments and loose moulding material grains falling off the casting form a foundry sand mixture G, in which moulding sand F, hardened inorganic and organic binders and possibly also combustion residues are present, which are the result of the combustion or decomposition of parts of the binder present in the respective core or molded part as a result of the heat supply during the casting process or the subsequent thermal treatment.
  • the foundry sand mixture G may also contain common additives that are added in practice to molding materials intended for the production of cores or molded parts in order, for example, to ensure optimal flow behavior during the molding of the respective core or molded part ("core shooting").
  • the mixture consisting of a proportion FAB of fragments or grains originating from mouldings or casting cores made of moulding material with an inorganic binder and a proportion FOB of fragments or grains originating from mouldings or casting cores made of moulding material with an organic binder is placed in the Fig.1 fed into the processing process shown.
  • the foundry sand mixture G first passes through a grain separation device 1 in which the coarse fragments contained in the foundry sand mixture G are crushed in a manner known per se until only grains and smaller fragments remain.
  • the foundry sand mixture G which has been separated into grains and optionally preheated in a heat exchanger (not shown here), is introduced into a mixing device 2 by means of gravity or, for example, by means of compressed air support.
  • the foundry sand mixture G is flowed through or stirred with cleaning water RW, which has been previously heated in a continuous flow heater, for example using a fluidized bed or an agitator, in order to form a slurry S.
  • cleaning water RW which has been previously heated in a continuous flow heater, for example using a fluidized bed or an agitator
  • the slurry S formed in the mixing device 2 is intensively circulated in order to ensure turbulence that supports the detachment of the inorganic binder and other contaminants. If necessary, heat is added to bring the slurry S to a process temperature that is in the optimal range of 80 - 100 °C. Excess cleaning water RWK contaminated with inorganic binder residues and other contaminants, such as molding additives and combustion residues, is drained from the mixing device 2.
  • the mixing of the cleaning water RW with the foundry sand mixture G is so intensive that the inorganic binder in particular dissolves essentially completely in the cleaning water RW within a short time.
  • the combustion residues and any additive residues present are absorbed by the cleaning water RW from the foundry sand mixture G.
  • the residence times of the slurry S in the mixing device 2 provided for this purpose are 5 - 60 minutes.
  • the slurry S passes into a rinsing device 3, in which it is rinsed with cleaning water RW in order to rinse the inorganic binder residues dissolved in the slurry S from the molding sand grains and other impurities from the molding sand grains F of the slurry S.
  • the rinsing device 3 can be designed as a conventional screening machine in which the slurry S is placed on a sieve and sprayed with cleaning water RW, which is applied by means of nozzles arranged above the sieve.
  • the resulting cleaning water RWK which is contaminated with inorganic binder residues and other contaminants, is collected and fed to a pre-cleaning device 4, in which the insoluble inorganic binder residues are separated from the contaminated cleaning water RWK.
  • the excess contaminated cleaning water RWK discharged from the mixing device 2 is also fed to the pre-cleaning device 4.
  • a partial flow RWKV' of the pre-cleaned contaminated cleaning water RWK can be reused by feeding it to the mixing device 2 as cleaning water RW.
  • the total volume flow of the cleaning water RW fed to the mixing device 2 can be made up of a partial flow of fresh cleaning water RWF and the partial flow RWKV' of the pre-cleaned cleaning water RWV.
  • another partial flow RWKV" of the pre-cleaned contaminated cleaning water RWK can be fed to the rinsing device 3 for rinsing the slurry S.
  • the total volume flow of the cleaning water RW fed to the rinsing device 3 can be composed of a partial flow of fresh cleaning water RWF and the partial flow RWKV' of the pre-cleaned cleaning water RWV as well as a further partial flow RWK' of contaminated cleaning water RWK, which comes from one or more of the process steps explained below.
  • Contaminated cleaning water RWKE which is so heavily contaminated that it can no longer perform a cleaning function, is drained from the process and fed into a separate treatment plant.
  • the molding sand F separated from the slurry S in the rinsing device 3 is to be used for the production of molding material which comprises an organic binder
  • the molding sand F passes through a treatment device 5 in which it is wetted with an acidic neutralizing solution NL in order to adjust its pH value to a value of 7 - 8 which is optimal for this purpose.
  • the molding sand F whose pH value has been adjusted in this way, is then rinsed in a rinsing device 6 with fresh cleaning water RWF in order to remove excess neutralizing solution NL.
  • the resulting cleaning water RWN which is contaminated with neutralization solution, is collected and disposed of.
  • the adjustment of the pH value in the treatment device 5 and the subsequent rinsing in the rinsing device 6 can be skipped if the molding sand F is intended exclusively for the production of molding material comprising an inorganic binder.
  • the molding sand F which is still loaded with cleaning water RW, is transported after rinsing in the rinsing device 3 or the optionally passed through stations "treatment device 5 and rinsing device 6" to a dewatering device 7, in which dewatering is carried out using mechanical means.
  • the dewatering machine 7 can be designed as a screening machine known for these purposes in the prior art, as a vacuum belt dryer or as a press.
  • the mechanical dewatering reduces the moisture of the molding sand F to such an extent that significantly less energy is required during the subsequent thermal drying to achieve the required degree of dryness.
  • the contaminated cleaning water RWK arising during mechanical dewatering is, for example, fed to the rinsing device 3 as a further partial flow of the cleaning water RW fed there.
  • the mechanically dewatered molding sand F is fed to a drying device 8, which can be a rotary kiln, a belt dryer or the like. If the foundry sand mixture G used includes a proportion of molding material fragments and grains that contain organic binders or binder residues, the temperature Tw at which the thermal drying takes place is set to >500 - 700 °C, so that the organic binder residues still adhering to the corresponding portion of the molding sand F burn off.
  • thermal drying can be carried out at temperatures in the range of 100 - 300 °C.
  • the water vapor generated during thermal drying is collected, condensed and fed into the process as fresh cleaning water RWF.
  • the fresh cleaning water RWF obtained during thermal drying also forms a partial flow of the cleaning water RW fed into the rinsing device 3.
  • the molding sand F passes through a dust removal device 9 in which the fine dust FS present in the molding sand F is separated from the remaining grains of the molding sand F.
  • the fine dust FS can no longer be used for casting purposes and is therefore deposited in the usual way or used for another purpose.
  • the dust removal device 9 is based, for example, on the principle of stream classification, in which air is used as the separation medium (so-called "air classification"). The air used here can be reused or released into the environment.
  • the dedusted molding sand F finally reaches a classification device 10, in which the molding sand F is divided into at least two molding sand partial quantities Fk, Fm according to at least two molding sand classes, of which one molding sand partial quantity Fk comprises the part of the molding sand F whose grains do not exceed a certain limit size, while the other molding sand partial quantity Fm contains the part of the molding sand F whose grains have a size that is at least equal to this limit size.
  • the classification step can also be carried out in combination with dedusting.
  • fluid basins are usually used in which the molding sand F is fed in from above, air is passed through a sintering plate attached to the floor and is set into vibration using unbalanced motors.
  • the fine dust FS is transported away by means of the air via a suction device.
  • the grain classes are extracted at opposite ends of the basin.
  • the finer parts rise higher and have to overcome a barrier.
  • the coarse parts do not rise as high and are therefore deducted below a barrier.
  • the fresh cleaning water RWF and reused contaminated cleaning water RWK required in the treatment process according to the invention or the cleaning water RW possibly formed by mixing them can, if necessary, be preheated via heat exchangers not shown here, in which waste heat generated in the process according to the invention itself or in other processes is used to heat the respective cleaning water RWF, RWK, RW to an optimal temperature for the respective process step.
  • Fig.1 The process flow followed by the foundry sand mixture G, the slurry S 40 formed from it and the molding sand F contained therein is shown in solid lines.
  • new molding material FA which contains inorganic binder
  • new molding material FO which contains organic binder
  • Cores or molded parts for casting molds can be produced in a conventional manner from the molding materials FA and FO.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (11)

  1. rocédé de récupération de sable de moulage (F) à partir d'un mélange de sable de fonderie (G) qui comporte au moins une proportion (FAB) de fragments de matériau de moulage ou des granulés de matériau de moulage en vrac se produisant lors du démoulage d'une pièce moulée hors du moule de coulage à la suite de la destruction des noyaux de coulée ou des parties de moulage formant la pièce moulée, lesquels sont formés à partir du sable de moulage (F) ainsi que d'un liant inorganique et d'un ou plusieurs additifs pour ajuster les propriétés du matériau de moulage, le procédé comportant les étapes de travail suivantes :
    a) mélanger le mélange de sable de fonderie (G) avec de l'eau de nettoyage (RW) pour former une boue (S) afin de dissoudre les résidus de liant inorganique (AB), contenus dans le mélange de sable de fonderie (G), ainsi que les additifs présents dans le sable de moulage (F) et de les rincer hors du mélange de sable de fonderie (G),
    et
    b) séparer l'eau de nettoyage (RWK) contaminée par les résidus de liants inorganiques du sable de moulage (F) contenu dans la boue (S),
    caractérisé en ce que
    la température de procédé de la boue (S) formée par l'eau de nettoyage et le mélange de sable de fonderie (G) (étape de travail a)) est de 80 - 100 °C,
    le mélange de sable de fonderie (G) avec l'eau de nettoyage (RW) en formant une boue (S) et la dissolution et le rinçage des résidus de liant inorganiques (AB) qui en découlent (étape de travail a)) est effectué en l'espace de 5 min à 60 min, l'eau de nettoyage (RWK) contaminée récupérée dans l'étape de travail b) est réutilisée au moins une fois pour l'étape de travail a),
    la réutilisation est répétée jusqu'à atteindre la solubilité du liant dans l'eau ou jusqu'à ce que la proportion de matière en suspension contenue dans l'eau prédomine.
    le pH du sable de moulage (F) obtenu dans l'étape de travail b) est réglé sur un pH de 7 - 8 par rinçage ou mouillage avec une solution neutralisante (NL).
  2. Procédé selon l'une des revendications précédentes, caractérisé en ce que les fragments de matériau de moulage contenus dans le mélange de sable de fonderie (G) sont granulés mécaniquement avant d'être mélangés avec l'eau de nettoyage (étape de travail a)).
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que le mélange de sable de fonderie (G) passe, avant l'étape de travail a), dans un échangeur de chaleur, à travers lequel est dirigée de l'eau de nettoyage (RWK), encore chaude, contaminée et séparée, dans l'étape de travail b), du sable de moulage (F) afin de préchauffer le mélange de sable de fonderie (G).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'eau de nettoyage (RWK) contaminée séparée, dans l'étape de travail b), du sable de moulage (F) passe dans échangeur de chaleur dans lequel est réchauffée l'eau de nettoyage (RW) affluente pour l'étape de travail a).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un acide dilué est utilisé en tant que solution neutralisante (NL).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le sable de moulage (F) obtenu dans l'étape de travail b) est déshydraté mécaniquement.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le sable de moulage (F) obtenu dans l'étape de travail b) est séché à une température de séchage de 80 - 800 °C.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le mélange de sable de fonderie (G) contient une proportion (FOB) de fragments ou de granulats de noyaux de moulage ou de parties de moulage formés à partir d'un matériau de moulage qui a été formé à partir du sable de moulage (F) ainsi que d'un liant organique et éventuellement à partir d'un ou plusieurs additifs pour ajuster les propriétés du matériau de moulage.
  9. Procédé selon la revendication 8, caractérisé en ce que le sable de moulage (F) obtenu dans l'étape de travail b) est chauffé à une température étant au moins de 500 °C afin de brûler des résidus de liant organique adhérant sur le sable de moulage (F).
  10. Procédé selon l'une des revendications 7 et 9, caractérisé en ce que la combustion des résidus de liant organique a lieu pendant le séchage du sable de moulage (F).
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que le sable de moulage obtenu dans l'étape de travail b) est soumis à une classification.
EP18180868.4A 2018-06-29 2018-06-29 Procédé de préparation d'un mélange de sable de fonderie Active EP3586995B2 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
HUE18180868A HUE054926T2 (hu) 2018-06-29 2018-06-29 Eljárás öntödei homokkeverék elõállítására
EP18180868.4A EP3586995B2 (fr) 2018-06-29 2018-06-29 Procédé de préparation d'un mélange de sable de fonderie
PL18180868T PL3586995T3 (pl) 2018-06-29 2018-06-29 Sposób przerobu mieszaniny masy formierskiej
ES18180868T ES2874204T3 (es) 2018-06-29 2018-06-29 Procedimiento para la preparación de una mezcla de arena de fundición
MX2020014218A MX2020014218A (es) 2018-06-29 2019-07-01 Procedimiento para tratar una mezcla de arena de fundición.
KR1020207036136A KR20210010908A (ko) 2018-06-29 2019-07-01 주물사 혼합물 처리 방법
JP2020572871A JP2021529667A (ja) 2018-06-29 2019-07-01 鋳物砂混合物の処理方法
US17/256,280 US11707777B2 (en) 2018-06-29 2019-07-01 Method for preparing a foundry sand mixture
PCT/IB2019/055584 WO2020003277A1 (fr) 2018-06-29 2019-07-01 Procédé de préparation d'un mélange de sable de fonderie
CN201980043992.7A CN112512723A (zh) 2018-06-29 2019-07-01 铸造用砂混合物的处理方法
BR112020026856-9A BR112020026856B1 (pt) 2018-06-29 2019-07-01 Processo para a recuperação de areia de moldagem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18180868.4A EP3586995B2 (fr) 2018-06-29 2018-06-29 Procédé de préparation d'un mélange de sable de fonderie

Publications (3)

Publication Number Publication Date
EP3586995A1 EP3586995A1 (fr) 2020-01-01
EP3586995B1 EP3586995B1 (fr) 2021-04-14
EP3586995B2 true EP3586995B2 (fr) 2024-04-24

Family

ID=62837769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18180868.4A Active EP3586995B2 (fr) 2018-06-29 2018-06-29 Procédé de préparation d'un mélange de sable de fonderie

Country Status (11)

Country Link
US (1) US11707777B2 (fr)
EP (1) EP3586995B2 (fr)
JP (1) JP2021529667A (fr)
KR (1) KR20210010908A (fr)
CN (1) CN112512723A (fr)
BR (1) BR112020026856B1 (fr)
ES (1) ES2874204T3 (fr)
HU (1) HUE054926T2 (fr)
MX (1) MX2020014218A (fr)
PL (1) PL3586995T3 (fr)
WO (1) WO2020003277A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116393655A (zh) * 2023-06-06 2023-07-07 河北光德精密机械股份有限公司 一种速溶型芯及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103056291A (zh) † 2012-12-12 2013-04-24 青岛三合山精密铸造有限公司 水玻璃旧砂的回收再生方法
DE102012011384A1 (de) † 2012-06-11 2013-12-12 DEANTEC GmbH Vorrichtung zum Regenerieren anorganisch gebundener Gießereisande
CN104759584A (zh) † 2015-04-22 2015-07-08 莒州集团有限公司 水玻璃废砂再生优化处理方法及系统

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299924A (en) * 1976-02-18 1977-08-22 Hitachi Ltd Old sand cleaning reproduction process
SU921664A1 (ru) 1980-04-25 1982-04-23 Предприятие П/Я А-1125 Способ регенерации формовочной и стержневой смеси с в жущими в виде гидроалюмината или гидрограната кальци
SU910309A1 (ru) 1980-09-05 1982-03-07 Государственный Проектный И Технологический Институт Кузнечно-Прессового Машиностроения Установка дл регенерации формовочных смесей
WO1985003462A1 (fr) 1984-02-02 1985-08-15 Giesserei-Technik H.-G. Lorek Vdg Procede et installation pour eliminer les restes de liants organiques et inorganiques provenant de sable de fonderie
DE4004553C1 (fr) 1990-02-14 1991-10-10 Saz Sommer Aluminium Zug Ag, Zug, Ch
BR9105097A (pt) 1990-03-20 1992-06-02 Kuettner Gmbh & Co Kg Dr Processo para a regeneracao de areia usada de fundicao
JP4679718B2 (ja) 2000-12-15 2011-04-27 国立大学法人豊橋技術科学大学 回収鋳物砂の再生方法
DE102005004519A1 (de) 2005-01-31 2006-08-10 Behr Gmbh & Co. Kg Kondensator für eine Klimaanlage, insbesondere eines Kraftfahrzeuges
DE102005041519A1 (de) 2005-08-31 2007-03-01 Klein Anlagenbau Ag Verfahren zum Behandeln von Gießereiformstoffen
WO2007082747A1 (fr) 2006-01-18 2007-07-26 Hos Hottinger Systems Gbr Procédé et dispositif pour recycler un mélange noyau-sable de fonderie
DE102007008149A1 (de) 2007-02-19 2008-08-21 Ashland-Südchemie-Kernfest GmbH Thermische Regenerierung von Gießereisand
CN101209485B (zh) * 2007-12-21 2013-10-16 李江平 一种旧砂再生方法及其旧砂再生系统
JP2011088125A (ja) 2009-10-26 2011-05-06 Acreco:Kk 遠赤外線放射材料
CN103394638A (zh) * 2013-08-20 2013-11-20 武汉纺织大学 一种逆洗再生铸造旧砂的方法与装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012011384A1 (de) † 2012-06-11 2013-12-12 DEANTEC GmbH Vorrichtung zum Regenerieren anorganisch gebundener Gießereisande
CN103056291A (zh) † 2012-12-12 2013-04-24 青岛三合山精密铸造有限公司 水玻璃旧砂的回收再生方法
CN104759584A (zh) † 2015-04-22 2015-07-08 莒州集团有限公司 水玻璃废砂再生优化处理方法及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BAUMBACH R.: "Erarbeitung einer umweltverfahrenstechnischen Konzeption zur Naß- Reinigung von Gießereialtsanden des sogenannten Wasserglas-Verfahrens", DIPLOMARBEIT, WOLFSBURG, 16 September 2002 (2002-09-16), Wolfsburg, [retrieved on 20220411] †

Also Published As

Publication number Publication date
EP3586995A1 (fr) 2020-01-01
JP2021529667A (ja) 2021-11-04
EP3586995B1 (fr) 2021-04-14
BR112020026856A2 (pt) 2021-04-06
PL3586995T3 (pl) 2021-10-25
BR112020026856B1 (pt) 2024-03-12
US11707777B2 (en) 2023-07-25
WO2020003277A1 (fr) 2020-01-02
US20210260647A1 (en) 2021-08-26
ES2874204T3 (es) 2021-11-04
HUE054926T2 (hu) 2021-10-28
MX2020014218A (es) 2021-05-27
KR20210010908A (ko) 2021-01-28
CN112512723A (zh) 2021-03-16

Similar Documents

Publication Publication Date Title
DE3103030C2 (de) Verfahren zur Gewinnung von Gießereisand aus gebrauchtem Gießereisand
DE4190731C1 (fr)
CH631643A5 (de) Verfahren zur regenerierung von giesserei-altsand sowie einrichtung zur durchfuehrung des verfahrens und erzeugnis des verfahrens.
DD296867A5 (de) Verfahren zur regenerierung von gebrauchten gruenem formsand
EP3586995B2 (fr) Procédé de préparation d'un mélange de sable de fonderie
CH681283A5 (fr)
DE102009041789A1 (de) Verfahren zum Recyclen von Aluminium aus Getränkedosen
DE2252217A1 (de) Verfahren zum rueckgewinnen von formgrundstoff
DE102021128758A1 (de) Verfahren und Vorrichtung zum Reinigen von mit organischen Stoffen behafteten gebrauchten Faserwertstoffen
DE3400656A1 (de) Verfahren zur regeneration von giesserei-schuttsanden
DE102007008104A1 (de) Verfahren zur Regeneration von Gießereisanden
DE2626224C2 (de) Verfahren zur Entfernung von Formmasse aus einer mit Guß gefüllten Form
EP3202927B1 (fr) Procede et dispositif de regeneration de sable de fonderie
DE1806842A1 (de) Verfahren und Vorrichtung,um Giesserei-Altsande zu regenerieren
CH681434A5 (fr)
DE212022000104U1 (de) Reaktionsvorrichtung zum Nachfüllen von anorganischem Kernsand mit Wasser zurWiederverwendung
DE102005029742B3 (de) Verfahren zum Behandeln von Gießereiformstoffen
DE2808773A1 (de) Verfahren zur rueckgewinnung von form- und kernsand von giessereien
EP0837747B1 (fr) Noyau pour moules a couler
DE4010377A1 (de) Verfahren zur formsandrueckgewinnung aus altsand von giessereibetrieben und system zu seiner durchfuehrung
DE4323217C1 (de) Verfahren und Anlage zum Herstellen von Baumaterialien sowie Verwendung von Leiterplattenmaterial hierfür
WO1985003462A1 (fr) Procede et installation pour eliminer les restes de liants organiques et inorganiques provenant de sable de fonderie
EP0149595A2 (fr) Procédé et dispositif de régénération de sables de fonderie
DE2451494A1 (de) Verfahren zum regenerieren von giesserei-schuttsand
DE2138481B2 (de) Verfahren zur Herstellung von Platten oder Formkorpern fur Steiger oder Blockkopfe fur den Metallguß sowie Vorrichtung zur Durchfuhrung dieses Verfahrens

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200630

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20201029

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502018004765

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1381866

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210515

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20210414

REG Reference to a national code

Ref country code: SK

Ref legal event code: T3

Ref document number: E 37818

Country of ref document: SK

REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E054926

Country of ref document: HU

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210816

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210714

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210715

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210814

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 502018004765

Country of ref document: DE

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: DEANTEC GMBH

Effective date: 20211210

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210629

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210814

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230622

Year of fee payment: 6

Ref country code: DE

Payment date: 20230622

Year of fee payment: 6

Ref country code: CZ

Payment date: 20230524

Year of fee payment: 6

Ref country code: BG

Payment date: 20230525

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20230616

Year of fee payment: 6

Ref country code: SK

Payment date: 20230524

Year of fee payment: 6

Ref country code: PL

Payment date: 20230626

Year of fee payment: 6

Ref country code: HU

Payment date: 20230602

Year of fee payment: 6

Ref country code: AT

Payment date: 20230623

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230623

Year of fee payment: 6

Ref country code: GB

Payment date: 20230622

Year of fee payment: 6

Ref country code: ES

Payment date: 20230726

Year of fee payment: 6

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20240424

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R102

Ref document number: 502018004765

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

REG Reference to a national code

Ref country code: CH

Ref legal event code: PK

Free format text: DIE PUBLIKATION VOM 27.03.2024 WURDE AM 24.04.2024 IRRTUEMLICHERWEISE ERNEUT PUBLIZIERT. LA PUBLICATION DU 27.03.2024 A ETE REPUBLIEE PAR ERREUR LE 24.04.2024. LA PUBBLICAZIONE DEL 27.03.2024 E STATA ERRONEAMENTE RIPUBBLICATA IL 24.04.2024.