FR2688053A3 - Installation for treating moulding sands, granular products and powders - Google Patents
Installation for treating moulding sands, granular products and powders Download PDFInfo
- Publication number
- FR2688053A3 FR2688053A3 FR9202791A FR9202791A FR2688053A3 FR 2688053 A3 FR2688053 A3 FR 2688053A3 FR 9202791 A FR9202791 A FR 9202791A FR 9202791 A FR9202791 A FR 9202791A FR 2688053 A3 FR2688053 A3 FR 2688053A3
- Authority
- FR
- France
- Prior art keywords
- sands
- tubular member
- installation according
- combustion chamber
- gases
- 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.)
- Granted
Links
- 238000009434 installation Methods 0.000 title claims abstract description 18
- 238000000465 moulding Methods 0.000 title 1
- 239000000843 powder Substances 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 230000003472 neutralizing effect Effects 0.000 claims abstract 2
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000567 combustion gas Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
- F27B7/04—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with longitudinal divisions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/50—Devolatilising; from soil, objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/24—Contaminated soil; foundry sand
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
- F27B7/04—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with longitudinal divisions
- F27B2007/043—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with longitudinal divisions the partition being a cylinder, coaxial to the rotary drum, defining two chambers
- F27B2007/045—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with longitudinal divisions the partition being a cylinder, coaxial to the rotary drum, defining two chambers the charge going in one direction in one chamber, then after a turn coming back in the other direction in the other chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B2009/2484—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being a helical device
Abstract
Description
Installation Dour le traitement des sables de fonderie. de produits aranuleux et oulvérulants. Installation For the processing of foundry sands. aranular and oulverulants products.
Actuellement, compte-tenu des normes de rejet et de pollution de plus en plus strictes, il est nécessaire de traiter thermiquement les sables de fonderie de manière à:
- les recycler au maximum,
- passiver les résidus ultims,
- rejeter dans l'environnement des éléments aux normes de neutralité.Currently, given the increasingly strict discharge and pollution standards, it is necessary to heat treat foundry sands so as to:
- recycle them as much as possible,
- passivate the ultimate residues,
- reject elements in the environment with standards of neutrality.
On connaît des systèmes de régénération thermique continus et discontinus. On peut citer par exemple, les systèmes continus de fluidisation à l'air, destinés à combiner une combustion à coeur des éléments combustibles, une diffusion thermique et une agitation du bain et transport des produits. Toutefois, de tels systèmes impliquent une énergie de brassage par le comburant avec un contrôle rigoureux de températures (détente des gaz) et de vitesse ascentionnelles des impalpables aux risques d'échapper des éléments gazeux non saturés (monoxyde de carbone, oxydes d'azote, hydrocarbures). Continuous and discontinuous thermal regeneration systems are known. Mention may be made, for example, of continuous air fluidization systems, intended to combine core combustion of the fuel elements, thermal diffusion and agitation of the bath and transport of the products. However, such systems involve mixing energy by the oxidant with rigorous control of temperatures (gas expansion) and ascental speed of the intangibles at the risk of escaping unsaturated gaseous elements (carbon monoxide, nitrogen oxides, hydrocarbons).
On peut citer encore, des installations discontinues, dans lesquelles les produits traités sont mis dans un four chauffant équipé drun agitateur de brassage. Dans ce cas, pendant la phase initiale de montée en température du sable, les gaz qui s'échappent du four sont impropres à leur rejet, étant donné que leur temps de séjour à haute température est insuffisant. Mention may also be made of discontinuous installations, in which the treated products are placed in a heating oven equipped with a stirring stirrer. In this case, during the initial temperature rise phase of the sand, the gases which escape from the furnace are unsuitable for rejection, since their residence time at high temperature is insufficient.
L'invention s'est fixée pour but de remédier à ces inconvénients, de manière simple, sûre, efficace et rationnelle. The object of the invention is to remedy these drawbacks in a simple, safe, efficient and rational manner.
Le problème que se propose de résoudre l'invention est de pouvoir:
- traiter thermiquement tout type de sables de fonderie (à prise chimique ou à vert),
- incinérer les fines et les poussières,
- neutraliser les fumées produites au cours du traitement dans un fonctionnement continu,
- économiser l'énergie en limitant les volumes des comburants mis en oeuvre,
- respecter les normes de rejet dans l'environnement.The problem which the invention proposes to solve is to be able to:
- heat treatment of all types of foundry sands (chemical or green),
- incinerate fines and dust,
- neutralize the fumes produced during the treatment in continuous operation,
- save energy by limiting the volumes of oxidizers used,
- respect the standards of discharge into the environment.
Pour résoudre de tels problèmes, il a été conçu et mis au point, une installation qui comprend, en combinaison
- des moyens de stockage des sables sous forme granuleuse
- des moyens pour acheminer les sables au niveau d'une chambre de combustion pour assurer le préchauffage des sables, la prégénération et le transport.To solve such problems, an installation has been designed and developed which, in combination
- means for storing sands in granular form
- means for conveying the sands to a combustion chamber to ensure the preheating of the sands, the pre-generation and the transport.
- des moyens de chauffage déterminés pour minimiser la génération des gaz de combustion. - heating means determined to minimize the generation of combustion gases.
- des moyens de brassage mécanique. - mechanical mixing means.
- des moyens aptes à maximiser le temps de séjour des gaz de combustion dans la chambre à haute température. - Means capable of maximizing the residence time of the combustion gases in the high temperature chamber.
- des moyens aptes à transporter le sable chaud vers des moyens de refroidissement, en combinant l'évacuation des gaz tout en réchauffant le sable introduit. - Means capable of transporting the hot sand to cooling means, by combining the evacuation of gases while heating the introduced sand.
- des moyens de captation des gaz pour les filtrer, les séparer et les recycler, en évitant tout rejet de poussière. - gas capture means to filter, separate and recycle them, avoiding any rejection of dust.
Pour résoudre le problème posé d'acheminer les sables de fonderie au niveau de la chambre de combustion, en vue de les soumettre à un traitement thermique, les moyens pour acheminer les sables sont constitués par un organe tubulaire fixe en communication avec les moyens de stockage, ledit organe recevant intérieurement une vis sans fin pour véhiculer les sables à l'extrémité opposée de l'organe tubulaire pour qu'ils tombent par gravité dans la chambre de combustion. To resolve the problem posed of conveying the foundry sands to the combustion chamber, with a view to subjecting them to a heat treatment, the means for conveying the sands are constituted by a fixed tubular member in communication with the storage means , said member internally receiving an endless screw for conveying the sands at the opposite end of the tubular member so that they fall by gravity into the combustion chamber.
Le problème posé d'assurer le traitement thermique des sables de fonderie, est résolu en ce que les moyens, aptes à pieger les gaz de combustion, sont constitués par un organe tubulaire entrainé positivement en rotation et disposé d'une manière concentrique à l'organe tubulaire fixe, I'extrémité dudit organe tubulaire entrainé positiviement en rotation, formant la chambre de combustion reliée à une source d'énergie, les deux organes tubulaires présentant en combinaison, des agencements pour le piégage des gaz et le transfert des sables ainsi traités. The problem posed of ensuring the heat treatment of foundry sands is resolved in that the means, capable of trapping the combustion gases, are constituted by a tubular member positively driven in rotation and arranged concentrically with the fixed tubular member, the end of said tubular member positively rotated, forming the combustion chamber connected to an energy source, the two tubular members having, in combination, arrangements for trapping gases and transferring the sands thus treated .
Plus particulièrement, pour piéger les gaz de combustion et les maintenir à l'air chaud le plus longtemps possible pour créer des pertes de charges, les agencements sont constitués par des spires formées en débordement de la périphérie interne de l'organe tubulaire tournant en étant disposées de manière hélicoïdale, pour assurer le transfert des sables le long de l'organe tubulaire fixe, au fur et à mesure de l'entraînement en rotation dudit organe, des éléments formant chicane étant disposés en débordement de la périphérie externe de l'organe tubulaire fixe. More particularly, in order to trap the combustion gases and keep them in hot air for as long as possible to create pressure drops, the arrangements consist of turns formed overhanging the internal periphery of the tubular member rotating while being arranged in a helical manner, to ensure the transfer of the sands along the fixed tubular member, as the drive in rotation of said member, elements forming a baffle being arranged beyond the outer periphery of the member fixed tubular.
Les éléments formant chicane sont disposés entre les spires. The baffle elements are arranged between the turns.
Compte-tenu du problème posé de créer un échangeur thermique de chaleur pour le traitement des sables, la paroi de l'organe tubulaire fixe est en acier réfractaire. La paroi de l'organe tubulaire tournant est isolé thermiquement. Given the problem posed of creating a heat exchanger for the treatment of sand, the wall of the fixed tubular member is made of refractory steel. The wall of the rotating tubular member is thermally insulated.
Pour résoudre le problème posé de récupérer les sables traités et les gaz, I'extrémité de l'organe tubulaire tournant, opposée à la chambre de combustion, présente périphériquement des orifices débouchants, en communication avec le réservoir de refroidissement et les moyens pour l'aspiration des gaz. To resolve the problem posed of recovering the treated sands and the gases, the end of the rotating tubular member, opposite the combustion chamber, peripherally has through orifices, in communication with the cooling tank and the means for gas suction.
Pour assurer l'alimentation de l'organe tubulaire fixe, les moyens de stockage des sables de fonderie sont reliés à l'organe tubulaire fixe par l'intermédiaire d'un moyen de transfert en communication avec la vis sans fin de l'organe tubulaire fixe. To ensure the supply of the fixed tubular member, the means for storing the foundry sands are connected to the fixed tubular member by means of a transfer means in communication with the worm of the tubular member. fixed.
Pour résoudre le problème posé d'obtenir un traitement thermique optimum, la source d'énergie est déterminée pour porter la chambre de combustion à une température de l'ordre de 850"C. To solve the problem of obtaining optimum heat treatment, the energy source is determined to bring the combustion chamber to a temperature of the order of 850 "C.
Un moyen de captation des gaz diamétralement opposé par rapport à l'évacuation des sables, permet de diriger les gaz vers un dispositif de préséparation des poussières, suivi d'une filtration des gaz avant rejet à l'atmosphère. A means of collecting gases diametrically opposite with respect to the evacuation of the sands, makes it possible to direct the gases towards a device for pre-separating dust, followed by filtration of the gases before discharge to the atmosphere.
L'invention est exposée, ci-après, plus en détail à l'aide des dessins annexés, dans lesquels:
La figure 1 est une vue à caractère schématique de l'installation selon l'invention
La figure 2 est une vue en coupe transversale considérée selon la ligne 2.2 de la figure 1.The invention is set out below in more detail with the aid of the appended drawings, in which:
Figure 1 is a schematic view of the installation according to the invention
Figure 2 is a cross-sectional view taken along line 2.2 of Figure 1.
La figure 3 est une vue en coupe transversale considérée selon la ligne 3.3 de la figure 1. Figure 3 is a cross-sectional view taken along line 3.3 of Figure 1.
Les sables de fonderie sont stockés dans des réservoirs (1) et (2). Par exemple, de manière parfaitement connue, le réservoir (1) contient les fines tandis que le réservoir (2) contient les sables. Les réservoirs (1) et (2) sont reliés à un moyen (3), sous forme d'un élément tubulaire agencé pour assurer le transfert des sables de fonderie, au niveau d'une chambre de combustion (C). The foundry sands are stored in tanks (1) and (2). For example, in a perfectly known manner, the tank (1) contains the fines while the tank (2) contains the sands. The tanks (1) and (2) are connected to a means (3), in the form of a tubular element arranged to ensure the transfer of foundry sands, at the level of a combustion chamber (C).
L'élément tubulaire (3), sous forme d'un tube cylindrique, reçoit intérieurement, une vis sans fin (4), dont le pas est déterminé pour assurer le transfert des sables en direction d'une ouverture (3a) formée à l'autre extrémité du tube (3) et en communication avec la chambre de combustion (C). Le tube (3) est fixe, tandis que la vis sans fin (4) est entrainée à rotation par tout moyen connu et approprié. L'alimentation en sables du tube (3) s'effectue, par exemple, au moyen d'une vis sans fin (5), reliée à chacun des réservoirs (1) et (2). The tubular element (3), in the form of a cylindrical tube, internally receives an endless screw (4), the pitch of which is determined to ensure the transfer of the sands towards an opening (3a) formed at 'other end of the tube (3) and in communication with the combustion chamber (C). The tube (3) is fixed, while the worm (4) is rotated by any known and appropriate means. The supply of sand to the tube (3) takes place, for example, by means of an endless screw (5), connected to each of the reservoirs (1) and (2).
Le tube (3) présente, d'une manière concentrique, un autre organe tubulaire (6) monté tournant par rapport audit tube (3). Là encore, l'entraînement en rotation de l'organe tubulaire (6) peut s'effectuer par tout moyen connu et approprié. Par exemple, L'organe tubulaire (6) et la vis sans fin (4) peuvent être entraînés d'une manière concomitante en rotation. The tube (3) has, concentrically, another tubular member (6) rotatably mounted relative to said tube (3). Here again, the tubular member (6) can be driven in rotation by any known and appropriate means. For example, the tubular member (6) and the worm (4) can be driven in a concomitant manner in rotation.
L'extrémité (6a) de l'organe tubulaire (6) située du côté de l'ouverture (3a) du tube (3) est conformée pour constituer la chambre de combustion (C). Cette extrémité (6a) reçoit une source d'énergie quelconque (17) pour porter la chambre de combustion (C) à une température de l'ordre de 850"C. The end (6a) of the tubular member (6) located on the side of the opening (3a) of the tube (3) is shaped to constitute the combustion chamber (C). This end (6a) receives any energy source (17) to bring the combustion chamber (C) to a temperature of the order of 850 "C.
Suivant une autre caractéristique importante de l'invention,
L'organe tubulaire (6) est agencé en combinaison, notamment avec le tube fixe (3), pour assurer le piégage des gaz et maintenir ces derniers un maximum de temps, au niveau de la chambre de combustion (C), pour les soumettre à l'effet de la température en vue de les neutraliser. A cet égard, I'alésage de l'organe (6) présente des spires (6b) disposées d'une manière hélicoïdale pour assurer, sous l'effet de l'entraînement en rotation dudit organe (6), I'entraînement concomitant des sables, le long du tube (3), en direction de l'extrémité (6c) opposée à la chambre de combustion (C). Le tube (3) présente en débordement de sa périphérie externe, des éléments (3b) faisant office de chicanes pour ralentir le passage des gaz.According to another important characteristic of the invention,
The tubular member (6) is arranged in combination, in particular with the fixed tube (3), to ensure the trapping of the gases and maintain them for a maximum of time, at the level of the combustion chamber (C), to subject them to the effect of temperature in order to neutralize them. In this regard, the bore of the member (6) has turns (6b) arranged in a helical manner to ensure, under the effect of the rotary drive of said member (6), the concomitant drive of sands, along the tube (3), towards the end (6c) opposite the combustion chamber (C). The tube (3) has, overflowing from its external periphery, elements (3b) acting as baffles to slow the passage of gases.
L'extrémité (6c) de l'organe tubulaire (6) présente périphériquement, des orifices (6d), en communication, d'une part, avec un réservoir de refroidissement (7) destiné à récupérer les sables traités et, d'autre part, avec un appareil (8) susceptible de piéger les poussières par effet cyclonique. A noter que les calories récupérées dans le refroidisseur (7) peuvent être réinjectées dans l'installation. De même, I'appareil (8) peut être relié à un filtre (9) avant rejet à l'atmosphère des gaz. The end (6c) of the tubular member (6) has peripherally, orifices (6d), in communication, on the one hand, with a cooling tank (7) intended to recover the treated sands and, on the other hand part, with an apparatus (8) capable of trapping dust by cyclonic effect. Note that the calories recovered in the cooler (7) can be reinjected into the installation. Likewise, the device (8) can be connected to a filter (9) before discharge to the gas atmosphere.
Le tube (3) est en acier réfractaire, permettant l'échange thermique à contre courant entre les sables convoyés par la vis sans fin (4) et ceux convoyés par l'organe tubulaire (6). L'organe tubulaire tournant (6) est isolé thermiquement. The tube (3) is made of refractory steel, allowing the countercurrent heat exchange between the sands conveyed by the worm (4) and those conveyed by the tubular member (6). The rotating tubular member (6) is thermally insulated.
II convient d'analyser le fonctionnement de l'installation selon l'invention. It is necessary to analyze the operation of the installation according to the invention.
Les sables contenus dans les réservoirs (1) et (2) sont acheminés par la vis sans fin (5), à l'état froid, dans le tube (3). La vis sans fin (4) assure le déplacement des sables à l'intérieur du tube (3), jusqu'au niveau de l'ouverture (3a). A ce niveau, les sables tombent dans la chambre de combustion (C) portée à une température de l'ordre de 850"C par la source d'énergie (17). L'entraînement en rotation de l'organe (6) a pour effet de faire remonter à contre courant les sables, le long du tube (3), en direction de l'extrémité (6c), compte-tenu du pas de vis (6b). Les chicanes (3b) ralentissent le passage des gaz résultant de la combustion, pour les maintenir un maximum de temps, à l'air chaud. Au niveau de l'extrémité (6c) et sous l'effet de la rotation de l'organe (6), les sables traités tombent par gravité par les ouvertures (6d) (figure 2), dans le système de refroidissement (7). The sands contained in the tanks (1) and (2) are conveyed by the worm (5), in the cold state, in the tube (3). The worm (4) moves the sands inside the tube (3) to the level of the opening (3a). At this level, the sands fall into the combustion chamber (C) brought to a temperature of about 850 "C by the energy source (17). The drive in rotation of the member (6) has the effect of raising the sands against the current, along the tube (3), in the direction of the end (6c), taking into account the thread (6b). The baffles (3b) slow the passage of gases resulting from combustion, to keep them as long as possible, with hot air. At the end (6c) and under the effect of the rotation of the member (6), the treated sands fall by gravity through the openings (6d) (Figure 2), in the cooling system (7).
Les gaz de combustion s'échappent par les ouvertures (6d) et sont aspirés par l'appareil (8). The combustion gases escape through the openings (6d) and are sucked in by the appliance (8).
Les avantages ressortent bien de la description. The advantages are apparent from the description.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9202791A FR2688053B3 (en) | 1992-03-02 | 1992-03-02 | PLANT FOR THE TREATMENT OF FOUNDRY SAND, GRANULAR AND POWDERY PRODUCTS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9202791A FR2688053B3 (en) | 1992-03-02 | 1992-03-02 | PLANT FOR THE TREATMENT OF FOUNDRY SAND, GRANULAR AND POWDERY PRODUCTS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2688053A3 true FR2688053A3 (en) | 1993-09-03 |
| FR2688053B3 FR2688053B3 (en) | 1994-02-18 |
Family
ID=9427499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9202791A Expired - Fee Related FR2688053B3 (en) | 1992-03-02 | 1992-03-02 | PLANT FOR THE TREATMENT OF FOUNDRY SAND, GRANULAR AND POWDERY PRODUCTS. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2688053B3 (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR391698A (en) * | 1908-06-25 | 1908-11-06 | Friedrich Julius Poths | Method and apparatus for firing cement in a rotary kiln |
| FR1493954A (en) * | 1966-09-19 | 1967-09-01 | Olin Mathieson | Rotary kilns with axially spaced transverse baffles |
| FR2354523A1 (en) * | 1976-06-08 | 1978-01-06 | Kobe Steel Ltd | METHOD AND APPARATUS FOR HEATING SOLID SUBSTANCES TO REDUCE THEIR VOLATILE MATTER CONTENT |
| DE3042146A1 (en) * | 1980-11-08 | 1982-06-16 | Karl Friedrich 7887 Laufenburg Zimmermann | Rotary kiln, esp. for treating oil sands or shales - has several conical stages giving gravity feed from one to next |
| US4439141A (en) * | 1982-05-05 | 1984-03-27 | Deckebach George J | Recuperative double chamber rotary furnace |
| EP0132493A1 (en) * | 1980-12-16 | 1985-02-13 | Cosworth Research And Development Limited | Apparatus for and method of reclaiming used foundry sand |
| WO1985005054A1 (en) * | 1984-04-30 | 1985-11-21 | Combustion Engineering, Inc. | Sand reclamation system embodying a combination thermal reclaimer and sand-to-sand heat exchanger apparatus |
| FR2584484A1 (en) * | 1985-07-04 | 1987-01-09 | Const Meca Et | Device for heating or cooling mechanical parts or other solid bodies |
| US4639217A (en) * | 1985-01-14 | 1987-01-27 | Adams D Carlos | Countercurrent heat transfer device for solid particle streams |
| US4941822A (en) * | 1989-07-20 | 1990-07-17 | Marvin Evans | Apparatus for heat treating contaminated particulate material |
-
1992
- 1992-03-02 FR FR9202791A patent/FR2688053B3/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR391698A (en) * | 1908-06-25 | 1908-11-06 | Friedrich Julius Poths | Method and apparatus for firing cement in a rotary kiln |
| FR1493954A (en) * | 1966-09-19 | 1967-09-01 | Olin Mathieson | Rotary kilns with axially spaced transverse baffles |
| FR2354523A1 (en) * | 1976-06-08 | 1978-01-06 | Kobe Steel Ltd | METHOD AND APPARATUS FOR HEATING SOLID SUBSTANCES TO REDUCE THEIR VOLATILE MATTER CONTENT |
| DE3042146A1 (en) * | 1980-11-08 | 1982-06-16 | Karl Friedrich 7887 Laufenburg Zimmermann | Rotary kiln, esp. for treating oil sands or shales - has several conical stages giving gravity feed from one to next |
| EP0132493A1 (en) * | 1980-12-16 | 1985-02-13 | Cosworth Research And Development Limited | Apparatus for and method of reclaiming used foundry sand |
| US4439141A (en) * | 1982-05-05 | 1984-03-27 | Deckebach George J | Recuperative double chamber rotary furnace |
| WO1985005054A1 (en) * | 1984-04-30 | 1985-11-21 | Combustion Engineering, Inc. | Sand reclamation system embodying a combination thermal reclaimer and sand-to-sand heat exchanger apparatus |
| US4639217A (en) * | 1985-01-14 | 1987-01-27 | Adams D Carlos | Countercurrent heat transfer device for solid particle streams |
| FR2584484A1 (en) * | 1985-07-04 | 1987-01-09 | Const Meca Et | Device for heating or cooling mechanical parts or other solid bodies |
| US4941822A (en) * | 1989-07-20 | 1990-07-17 | Marvin Evans | Apparatus for heat treating contaminated particulate material |
Non-Patent Citations (1)
| Title |
|---|
| FOUNDRY TRADE JOURNAL vol. 158, no. 3033, Avril 1985, REDHILL, SURREY, GB pages 267 - 273 LAVINGTON 'Thermal Reclamation of Resin-bonded Sands' * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2688053B3 (en) | 1994-02-18 |
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