EP1916337A1 - Device for preparing a bituminous concrete - Google Patents

Device for preparing a bituminous concrete Download PDF

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Publication number
EP1916337A1
EP1916337A1 EP07020986A EP07020986A EP1916337A1 EP 1916337 A1 EP1916337 A1 EP 1916337A1 EP 07020986 A EP07020986 A EP 07020986A EP 07020986 A EP07020986 A EP 07020986A EP 1916337 A1 EP1916337 A1 EP 1916337A1
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EP
European Patent Office
Prior art keywords
drum
mixer
filler
mix
aggregates
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
Application number
EP07020986A
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German (de)
French (fr)
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EP1916337B1 (en
Inventor
David Devautour
Michael Devautour
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AP TECHNIC ASPHALT PLANT TECHNIC
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AP TECHNIC ASPHALT PLANT TECHNIC
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Publication of EP1916337A1 publication Critical patent/EP1916337A1/en
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Publication of EP1916337B1 publication Critical patent/EP1916337B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027—Mixing in a rotary receptacle
    • E01C19/1036—Mixing in a rotary receptacle for in-plant recycling or for reprocessing, e.g. adapted to receive and reprocess an addition of salvaged material, adapted to reheat and remix cooled-down batches
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027—Mixing in a rotary receptacle
    • E01C19/1031—Mixing in a rotary receptacle the mixture being discharged continuously
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/1086—Mixing containers having concentric drums
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/109—Mixing containers having a counter flow drum, i.e. the flow of material is opposite to the gas flow

Definitions

  • the present invention relates to a device for preparing a bituminous concrete, also called asphalt, for the recovery of roads.
  • Asphalt is mainly composed of at least a mixture of small pieces of stones, also called aggregates or aggregates and a binder, also called bitumen.
  • the aggregates are dried in a first step in a rotary drum provided with a burner disposed on its axis of rotation.
  • the dry and hot aggregates are introduced into a kneader forming an entity distinct from the drum.
  • hot bitumen is poured onto the aggregates through the kneader and the mixture is mixed to form a homogeneous paste constituting the mix.
  • the disadvantage of such a device is related to the amounts of energy needed to make it work. Indeed, the aggregates must be sufficiently heated to be able to heat in turn the recycled mix. In addition, the pre-coated aggregates lose heat as they are transferred from the drum to the mixer. Finally, the kneader must be heated so that the output asphalt is at a sufficient temperature.
  • the document US-A-5,261,738 describes an example of an asphalt preparation device in which the useful energy is saved.
  • This device comprises a rotary drum provided with a burner into which the aggregates to be dried are introduced. It further comprises a kneader constituted by a circular space disposed coaxially and at the periphery of the drum. Blades attached to the periphery of the drum move in the mixing space as the drum rotates. Thus, the mix formed by the kneader is maintained at temperature by its contact with the hot drum.
  • the disadvantage of this device is that the mixing is carried out at the speed of rotation of the drum. However, it can sometimes be interesting to knead at different speeds, especially when additives are added.
  • the object of the present invention is therefore to provide a mix preparation device having a good thermal efficiency and allowing a mixing speed variation.
  • the present invention relates to a continuous mix preparation device comprising a drum rotatably mounted about its longitudinal axis, a kneader arranged under the drum, comprising a rotary mixing means and a thermal envelope surrounding the drum, characterized in that the rotary mixing means of the kneader rotates independently of the drum.
  • the device according to the invention has both a good thermal efficiency and a capacity of adaptation of the mixer to the products, these elements not being dependent on one another.
  • the thermal envelope is arranged partly around the drum and partly between the drum and the kneader so as to ensure the junction between the drum and the kneader.
  • the thermal envelope of the invention makes it possible both to maintain the heat in the drum and to use it to heat the kneader.
  • the rotary mixing means is driven by a motorized assembly capable of rotating at several speeds.
  • the speed of the kneader can thus be adapted to the products which are introduced into the kneader.
  • the rotary mixing means is a set of two trees arranged side by side and each provided at its periphery with blades.
  • the thermal envelope comprises openings for introducing via conduits products directly into the mixer.
  • the thermal envelope allows the introduction of products directly into the mixer without opening constraints of the mixer.
  • the products can be introduced at the precise place where it is desired to mix them with other products.
  • the kneader comprises, from upstream to downstream, an inlet for dry aggregates coming from the drum, an inlet for bitumen, an inlet for recycled asphalt, an inlet for dusts of aggregates also called filler and an entry for additives.
  • Each input allows the introduction into the mixer of a product and thus the products can be introduced in the chosen order.
  • the invention also relates to a process for the preparation of a continuous mix in a device according to the invention.
  • This process consists in inserting in order in the mixer: dry aggregates from the drum, then the bitumen and finally the filler.
  • the method further comprises inserting into the mixer between the bitumen and the filler, recycled mix.
  • the method further comprises inserting into the mixer, after the filler, additives such as filler filler, sand, dyes, fibers.
  • the asphalt preparation device according to the invention 1 is of continuous type, that is to say that it allows the uninterrupted production of bituminous concrete also called asphalt. It comprises a movable support platform 10 provided with support feet 100 and an axle 110.
  • the support legs 100 support the device when it is not in use or on the contrary when it is put into operation.
  • the support platform 10 is inclined slightly in a direction opposite to the axle 110.
  • the axle 110 makes it possible to make the mobile device allowing its movement on this axle, the support legs 100 then being moved to a position in which they do not touch the ground so as not to hinder the movement of the support 10.
  • the drum 12 On this support platform 10, are mounted, a drum 12, a thermal envelope 14, a mixer 18 and a burner 16.
  • the drum 12 is cylindrical and rotatably mounted about its longitudinal axis of symmetry. It is intended to dry and heating aggregates A introduced at a first end 12a of the drum 12 via a conveyor 11.
  • the burner 16 is placed at a second end 12b of the drum 12 which is preferably the lowest due to the inclination of the support platform 10. This second end 12b is opposite the first end 12a through which the aggregates A are introduced.
  • the burner 16 produces a flame F at a temperature of about 1200 to 1400 ° C extending longitudinally in the drum 12 at its axis of rotation. This flame F is intended to dry and heat the aggregates A.
  • the thermal envelope 14 surrounds the drum 12 over part of its length, approximately where the flame F produced by the burner 16 is located.
  • the thermal envelope 14 acts as a thermal insulator. It prevents heat leakage from the drum 12 and between the drum 12 and the mixer 18.
  • the thermal envelope 14 has several openings 141 and 143 through which can be inserted conduits 140 and 144 for introducing produced in the mixer 18.
  • the conduits 142 and 180 also make it possible to introduce products into the mixer 18.
  • the mixer 18 is placed under the drum 12 and vertically.
  • the thermal envelope 14 makes the connection between the drum 12 and a tank 181 forming the bottom of the kneader 18 (see Fig. 2).
  • This tank 181 is pivotable, that is to say it can be inclined relative to the support platform 10 along an axis X transverse to the tank 181.
  • the inside of the mixer 18 can be easily cleaned.
  • the mixer 18 comprises two shafts 182 arranged side by side horizontally so as to cause the asphalt forming towards the outlet which is at the highest end of the mixer 18. These shafts 182 are preferably in the form of worm . These shafts 182 are rotated by a motorized assembly 184. Each shaft 182 comprises blades 183 capable of mixing the products introduced into the mixer 18. An outlet chute 186 is provided at the outlet of the mixer 18 to allow embedded in the kneader 18 to be conveyed to a storage hopper (not shown).
  • the aggregates A used for the manufacture of the mix are calibrated in pre-dosing devices (not shown) and are conveyed to the first end 12a of the drum 12.
  • Aggregates A generally used for this purpose, comprise about 5% humidity. Their size established by the predosage devices is determined according to the formula of the mix to be prepared.
  • the aggregates A are driven in rotation and aided by the slight slope imposed by the inclination of the support platform 10 and thus move to the burner 16. During their movement along the drum 12, they are dried and reheated to a temperature of about 140 ° C to about 280 ° C. Preferably, the aggregates A will be heated to a temperature of around 280 ° C. if it is intended to exceptionally add recycled mix to the mix formed in the mixer 18. On the other hand, if this supply of mix recycled is not expected, the temperature of aggregates A will be increased to around 140 ° C.
  • Aggregate dust A also referred to as fines or filler, is recovered in a filter (not shown) via a decompression chamber 20.
  • the filter used is preferably a bag-type filter.
  • This filter is able to suck up and separate the dust from aggregates A circulating in the drum 12.
  • this filter makes it possible to suck up the dust in the drum 12 without the risk of sucking up other substances such as fumes. hydrocarbons released by the mix from the kneader 18, substances which are burned by the flame F of the burner 16 in the drum 12.
  • the decompression chamber 20 is disposed near the first end 12a of the drum 12 and communicates on the one hand with the drum 12 and on the other hand with the filter through a duct (not shown) connected to the an opening O provided on one of its walls.
  • This decompression chamber 20 has for role of creating an intermediate zone between the drum 12 and the filter in which air and dust aggregates suspended in the air drum 12 are sucked.
  • the velocity of the air is reduced so that the heaviest airborne aggregate dust settles down.
  • the lightest dust remains in suspension in the air circulating in the decompression chamber 20.
  • the decompression chamber 20 thus performs a first separation of the aggregate dust.
  • the air with the lightest dust is sucked from the decompression chamber 20 to the filter.
  • the dust remains suspended in the air are filtered.
  • the filter thus performs a second separation of the aggregate dust.
  • the dust thus obtained by filtering is stored in the filter.
  • These dusts constitute the filler f. This filler f will be introduced into the mixer 18 to manufacture the mix.
  • the drum 12 has blades 120 regularly distributed on its inner surface (see Fig. 2).
  • the blades 120 drive the aggregates A which are thus stirred and dry quickly in contact with the flame F.
  • the aggregates A and move from the end 12a through which they are introduced to the source S of the flame F.
  • the drum 12 communicates with the mixer 18 via the thermal envelope 14.
  • the aggregates A dry and heated between 140 ° C and 280 ° C, are therefore poured into the mixer 18 at this location.
  • conduits 142 and 180 In the region of the drum 12 which is covered by the thermal envelope 14, other products are introduced through conduits 142 and 180 through the thermal envelope 14. Bitumen D is introduced in particular through the conduit 180 and the filler f from the filtering is introduced into the conduit 142.
  • the conduits 142 and 180 open into the mixer 18.
  • Other products may optionally be introduced into the mixer 18 through conduits 140, 144 through the thermal envelope 14.
  • These products are in particular recycled mix B, introduced by a first conduit 140 and additives C of all kinds such as fibers, iron oxide, dyes, sand or fill filler composed of mineral particles finely crushed, introduced by a second conduit 144.
  • the filler filler is not derived from filtering but a storage silo provided for this purpose.
  • the aggregates A dropped into the kneader 18 are first mixed with liquid bitumen D heated to 160 ° C., introduced via the pipe 180.
  • the bitumen D which has a flash point at approximately 220 ° C. undergoes a phenomenon of cracking when brought into contact with hot aggregates.
  • the water vapor from the aggregates A and the hydrocarbon vapors produced by the bitumen D back to the burner 16 where they are burned by the flame F of the burner 16. This rise is obtained thanks to a fan that includes the filter which creates a slight depression in the drum 12. Thus, no toxic gas discharge is released into the atmosphere.
  • the paste formed of bitumen D and aggregates A can then advantageously be mixed, if desired, with the recycled mix B.
  • the filler f resulting from the filtering is introduced through the conduit 142 by a booster into the mixer 18 where it mixes in turn with the asphalt paste in formation.
  • This filler being vaporized on the dough in formation does not form balls of fines or inclusions in the dough.
  • the filler f makes it possible to increase the mechanical bonding of the aggregates A with the bitumen D.
  • additives C such as filler filler may be introduced into the kneader 18 via the conduit 144. These additives C and in particular the filler filler are introduced at the end to to avoid the formation of balls of fines in the asphalt paste.
  • the kneading speed can be set independently of the rotational speed of the drum 12, which makes it possible to adapt the kneading to the type of additive introduced into the kneader 18.
  • a homogeneous paste of asphalt at about 160 ° C is derived from the mixer 18 through the outlet chute 186 and transported via a scraper lift (not shown) to a storage hopper (not shown).
  • the asphalt is stored at a temperature of 160 ° C so that it can be spread over roads at a temperature of 130 ° C.
  • the thermal envelope of the preparation device according to the invention advantageously makes it possible to avoid the heat losses between the drum 12 and the mixer 18 and, as a result, makes it possible both to obtain a good thermal efficiency and to reduce the amount of energy required (fuel) to its operation, especially at the mixer 18 which maintains a constant temperature of the asphalt formation.
  • the destruction of hydrocarbon vapors by the burner reduces harmful emissions to the atmosphere more than a conventional installation. This is made possible thanks to the junction created by the thermal envelope 14 between the drum 12 and the mixer 18.
  • the amount of bitumen D necessary for the formation of asphalt is also reduced because of the introduction of recycled asphalt in the mixer.
  • the filler introduction mode f also contributes to this bitumen economy because of the improved mixing it provides.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Working-Up Tar And Pitch (AREA)

Abstract

The device has a drum (12) mounted in a rotating manner around a longitudinal axis, and a mixer (18) is arranged below the drum. A thermal cover (14) surrounds the drum, on part of its length, at place where flame (f) is found, where the flame is produced by a burner. The mixer has shafts (182) that are driven in rotation by a motorized assembly. Each shaft has blades (183) to mix products introduced in the mixer (18), where speed of mixing is adjusted independent of speed of rotation of the drum to adapt mixing of additive introduced in the mixer. An independent claim is also included for a method for preparing bituminous concrete without interruption using bituminous concrete preparing device.

Description

La présente invention concerne un dispositif de préparation d'un béton bitumineux, aussi appelé enrobé, destiné au recouvrement des routes.The present invention relates to a device for preparing a bituminous concrete, also called asphalt, for the recovery of roads.

L'enrobé se compose principalement d'au moins un mélange de petits morceaux de pierres, aussi appelés agrégats ou granulats et d'un liant, aussi appelé bitume. Pour obtenir ce mélange dont les proportions permettent la réalisation d'une formule unique, réalisée en fonction de spécifications client, on procède dans une première étape au séchage des agrégats dans un tambour rotatif pourvu d'un brûleur disposé sur son axe de rotation. Puis, dans une seconde étape, on introduit les agrégats secs et chauds dans un malaxeur formant une entité distincte du tambour. Enfin, dans une troisième étape, du bitume chaud est versé sur les agrégats au travers du malaxeur et l'ensemble est mélangé de manière à former une pâte homogène constituant l'enrobé. Ces étapes peuvent être réalisées de manière continue ou discontinue.Asphalt is mainly composed of at least a mixture of small pieces of stones, also called aggregates or aggregates and a binder, also called bitumen. In order to obtain this mixture, the proportions of which make it possible to produce a single formula, produced according to customer specifications, the aggregates are dried in a first step in a rotary drum provided with a burner disposed on its axis of rotation. Then, in a second step, the dry and hot aggregates are introduced into a kneader forming an entity distinct from the drum. Finally, in a third step, hot bitumen is poured onto the aggregates through the kneader and the mixture is mixed to form a homogeneous paste constituting the mix. These steps can be performed continuously or discontinuously.

Un dispositif de préparation d'enrobé effectuant ces étapes est par exemple décrit dans la demande de brevet français FR-A-2 631 354 . Dans ce document, les agrégats neufs sont séchés et chauffés dans le tambour et des morceaux d'enrobé recyclés sont réchauffés au contact des agrégats neufs chauds. Le bitume que comporte l'enrobé recyclé fond et s'épand sur les agrégats neufs. Les agrégats ainsi pré-enrobés sont introduits dans le malaxeur. Du bitume liquide est alors introduit dans le malaxeur afin d'assurer l'enrobage final des agrégats et la formation d'enrobé.An asphalt preparation device performing these steps is for example described in the patent application. French FR-A-2,631,354 . In this document, the new aggregates are dried and heated in the drum and recycled slabs of reed are reheated in contact with the hot new aggregates. The bitumen contained in recycled mixes melts and spreads on new aggregates. The aggregates thus pre-coated are introduced into the kneader. Liquid bitumen is then introduced into the kneader to ensure the final coating of the aggregates and the formation of asphalt.

L'inconvénient d'un tel dispositif est lié aux quantités d'énergies nécessaires pour le faire fonctionner. En effet, les agrégats doivent être chauffés suffisamment pour pouvoir chauffer à leur tour l'enrobé recyclé. En outre, les agrégats pré-enrobés perdent de la chaleur lorsqu'ils sont transférés du tambour au malaxeur. Enfin, le malaxeur doit être chauffé pour qu'en sortie l'enrobé soit à une température suffisante.The disadvantage of such a device is related to the amounts of energy needed to make it work. Indeed, the aggregates must be sufficiently heated to be able to heat in turn the recycled mix. In addition, the pre-coated aggregates lose heat as they are transferred from the drum to the mixer. Finally, the kneader must be heated so that the output asphalt is at a sufficient temperature.

Le document US-A-5 261 738 décrit un exemple d'un dispositif de préparation d'enrobé dans lequel l'énergie utile est économisée. Ce dispositif comporte un tambour rotatif pourvu d'un brûleur dans lequel sont introduits les agrégats à sécher. Il comporte en outre un malaxeur constitué par un espace circulaire disposé coaxialement et à la périphérie du tambour. Des pales fixées à la périphérie du tambour se déplacent dans l'espace de malaxage lorsque le tambour tourne. Ainsi, l'enrobé formé par le malaxeur est maintenu à température par son contact avec le tambour chaud.The document US-A-5,261,738 describes an example of an asphalt preparation device in which the useful energy is saved. This device comprises a rotary drum provided with a burner into which the aggregates to be dried are introduced. It further comprises a kneader constituted by a circular space disposed coaxially and at the periphery of the drum. Blades attached to the periphery of the drum move in the mixing space as the drum rotates. Thus, the mix formed by the kneader is maintained at temperature by its contact with the hot drum.

L'inconvénient de ce dispositif est que le malaxage est effectué à la vitesse de rotation du tambour. Or, il peut parfois être intéressant de malaxer à des vitesses différentes, notamment lorsque des additifs sont ajoutés.The disadvantage of this device is that the mixing is carried out at the speed of rotation of the drum. However, it can sometimes be interesting to knead at different speeds, especially when additives are added.

Le but de la présente invention est donc de proposer un dispositif de préparation d'enrobé ayant un bon rendement thermique et permettant une variation de vitesse de malaxage.The object of the present invention is therefore to provide a mix preparation device having a good thermal efficiency and allowing a mixing speed variation.

A cet effet, la présente invention concerne un dispositif de préparation d'enrobé en continu comprenant un tambour monté rotatif autour de son axe longitudinal, un malaxeur disposé sous le tambour, comportant un moyen de mélange rotatif et une enveloppe thermique entourant le tambour, caractérisé en ce que le moyen de mélange rotatif du malaxeur tourne indépendamment du tambour.To this end, the present invention relates to a continuous mix preparation device comprising a drum rotatably mounted about its longitudinal axis, a kneader arranged under the drum, comprising a rotary mixing means and a thermal envelope surrounding the drum, characterized in that the rotary mixing means of the kneader rotates independently of the drum.

Le dispositif selon l'invention possède à la fois un bon rendement thermique et une capacité d'adaptation du malaxeur aux produits, ces éléments n'étant pas dépendants l'un de l'autre.The device according to the invention has both a good thermal efficiency and a capacity of adaptation of the mixer to the products, these elements not being dependent on one another.

Selon une caractéristique avantageuse de l'invention, l'enveloppe thermique est disposée en partie autour du tambour et en partie entre le tambour et le malaxeur de manière à assurer la jonction entre le tambour et le malaxeur.According to an advantageous characteristic of the invention, the thermal envelope is arranged partly around the drum and partly between the drum and the kneader so as to ensure the junction between the drum and the kneader.

L'enveloppe thermique de l'invention permet à la fois de maintenir la chaleur dans le tambour et de l'utiliser pour réchauffer le malaxeur.The thermal envelope of the invention makes it possible both to maintain the heat in the drum and to use it to heat the kneader.

Selon un mode de réalisation particulier, le moyen de mélange rotatif est entraîné par un ensemble motorisé apte à le faire tourner à plusieurs vitesses.According to a particular embodiment, the rotary mixing means is driven by a motorized assembly capable of rotating at several speeds.

La vitesse du malaxeur peut ainsi être adaptée aux produits qui sont introduits dans le malaxeur.The speed of the kneader can thus be adapted to the products which are introduced into the kneader.

Selon un mode de réalisation préféré de l'invention, le moyen de mélange rotatif est un ensemble de deux arbres disposés côte à côte et chacun pourvu à sa périphérie de pales.According to a preferred embodiment of the invention, the rotary mixing means is a set of two trees arranged side by side and each provided at its periphery with blades.

Selon une autre caractéristique avantageuse de l'invention, l'enveloppe thermique comporte des ouvertures permettant d'introduire par l'intermédiaire de conduits des produits directement dans le malaxeur.According to another advantageous characteristic of the invention, the thermal envelope comprises openings for introducing via conduits products directly into the mixer.

L'enveloppe thermique permet l'introduction de produits directement dans le malaxeur sans contraintes d'ouverture du malaxeur. En outre, les produits peuvent ainsi être introduits à l'endroit précis où l'on souhaite les mélanger aux autres produits.The thermal envelope allows the introduction of products directly into the mixer without opening constraints of the mixer. In addition, the products can be introduced at the precise place where it is desired to mix them with other products.

Selon une autre caractéristique avantageuse de l'invention, le malaxeur comporte d'amont en aval une entrée pour des agrégats secs issus du tambour, une entrée pour du bitume, une entrée pour de l'enrobé recyclé, une entrée pour des poussières d'agrégats aussi appelées filler et une entrée pour des additifs.According to another advantageous characteristic of the invention, the kneader comprises, from upstream to downstream, an inlet for dry aggregates coming from the drum, an inlet for bitumen, an inlet for recycled asphalt, an inlet for dusts of aggregates also called filler and an entry for additives.

Chaque entrée permet l'introduction dans le malaxeur d'un produit et ainsi les produits peuvent être introduits dans l'ordre choisi.Each input allows the introduction into the mixer of a product and thus the products can be introduced in the chosen order.

L'invention concerne également un procédé de préparation d'enrobé en continu dans un dispositif selon l'invention. Ce procédé consiste à insérer dans l'ordre dans le malaxeur : des agrégats secs issus du tambour, puis du bitume et enfin du filler.The invention also relates to a process for the preparation of a continuous mix in a device according to the invention. This process consists in inserting in order in the mixer: dry aggregates from the drum, then the bitumen and finally the filler.

Selon un mode de mise en oeuvre avantageux de l'invention, le procédé consiste en outre à insérer dans le malaxeur entre le bitume et le filler, de l'enrobé recyclé.According to an advantageous embodiment of the invention, the method further comprises inserting into the mixer between the bitumen and the filler, recycled mix.

Selon un mode de mise en oeuvre avantageux de l'invention, le procédé consiste en outre à insérer dans le malaxeur, après le filler, des additifs tels que du filler d'apport, du sable, des colorants, des fibres.According to an advantageous embodiment of the invention, the method further comprises inserting into the mixer, after the filler, additives such as filler filler, sand, dyes, fibers.

Les caractéristiques de l'invention mentionnées ci-dessus ainsi que d'autres apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels :

  • la Fig. 1 représente une vue de côté d'un dispositif de préparation d'enrobé selon l'invention, et
  • la Fig. 2 représente une vue en coupe selon la plan A-A de la Fig. 1 du dispositif de préparation d'enrobé selon l'invention.
The characteristics of the invention mentioned above as well as others will appear more clearly on reading the following description of an exemplary embodiment, said description being given in relation to the attached drawings, among which:
  • FIG. 1 is a side view of an asphalt preparation device according to the invention, and
  • FIG. 2 is a sectional view along the plane AA of FIG. 1 of the asphalt preparation device according to the invention.

Le dispositif de préparation d'enrobé selon l'invention 1 est de type continu, c'est-à-dire qu'il permet la production sans interruption de béton bitumineux aussi appelé enrobé. Il comporte une plateforme de support 10 mobile pourvue de pieds support 100 et d'un essieu 110. Les pieds de support 100 supportent le dispositif lorsque celui-ci n'est pas utilisé ou au contraire lorsqu'il est mis en fonctionnement. Lorsque les pieds de support 100 sont montés, la plateforme de support 10 est légèrement inclinée dans une direction opposée à l'essieu 110.The asphalt preparation device according to the invention 1 is of continuous type, that is to say that it allows the uninterrupted production of bituminous concrete also called asphalt. It comprises a movable support platform 10 provided with support feet 100 and an axle 110. The support legs 100 support the device when it is not in use or on the contrary when it is put into operation. When the support legs 100 are mounted, the support platform 10 is inclined slightly in a direction opposite to the axle 110.

L'essieu 110 permet de rendre le dispositif mobile en autorisant son déplacement sur cet essieu, les pieds de support 100 étant alors déplacés vers une position dans laquelle ils ne touchent pas le sol afin de ne pas gêner le déplacement du support 10.The axle 110 makes it possible to make the mobile device allowing its movement on this axle, the support legs 100 then being moved to a position in which they do not touch the ground so as not to hinder the movement of the support 10.

Sur cette platefornne de support 10, sont montés, un tambour 12, une enveloppe thermique 14, un malaxeur 18 et un brûleur 16. Le tambour 12 est cylindrique et monté à rotation autour de son axe de symétrie longitudinal. Il est prévu pour sécher et réchauffer des agrégats A introduits à une première extrémité 12a du tambour 12 par l'intermédiaire d'un convoyeur 11.On this support platform 10, are mounted, a drum 12, a thermal envelope 14, a mixer 18 and a burner 16. The drum 12 is cylindrical and rotatably mounted about its longitudinal axis of symmetry. It is intended to dry and heating aggregates A introduced at a first end 12a of the drum 12 via a conveyor 11.

Le brûleur 16 est placé à une seconde extrémité 12b du tambour 12 qui est préférentiellement la plus basse du fait de l'inclinaison de la plateforme de support 10. Cette seconde extrémité 12b est opposée à la première extrémité 12a par laquelle sont introduits les agrégats A. Le brûleur 16 produit une flamme F à une température d'environ 1200 à 1400°C s'étendant longitudinalement dans le tambour 12 au niveau de son axe de rotation. Cette flamme F est prévue pour sécher et chauffer les agrégats A.The burner 16 is placed at a second end 12b of the drum 12 which is preferably the lowest due to the inclination of the support platform 10. This second end 12b is opposite the first end 12a through which the aggregates A are introduced. The burner 16 produces a flame F at a temperature of about 1200 to 1400 ° C extending longitudinally in the drum 12 at its axis of rotation. This flame F is intended to dry and heat the aggregates A.

L'enveloppe thermique 14 entoure le tambour 12 sur une partie de sa longueur, approximativement à l'endroit où se trouve la flamme F produite par le brûleur 16. L'enveloppe thermique 14 agit comme un isolateur thermique. Elle permet d'éviter les fuites de chaleur du tambour 12 et entre le tambour 12 et le malaxeur 18. L'enveloppe thermique 14 dispose de plusieurs ouvertures 141 et 143 au travers desquelles peuvent être insérés des conduits 140 et 144 permettant d'introduire des produits jusque dans le malaxeur 18. Des conduits 142 et 180 permettent également d'introduire des produits jusque dans le malaxeur 18.The thermal envelope 14 surrounds the drum 12 over part of its length, approximately where the flame F produced by the burner 16 is located. The thermal envelope 14 acts as a thermal insulator. It prevents heat leakage from the drum 12 and between the drum 12 and the mixer 18. The thermal envelope 14 has several openings 141 and 143 through which can be inserted conduits 140 and 144 for introducing produced in the mixer 18. The conduits 142 and 180 also make it possible to introduce products into the mixer 18.

Le malaxeur 18 est disposé sous le tambour 12 et à sa verticale. L'enveloppe thermique 14 fait le lien entre le tambour 12 et une cuve 181 formant le fond du malaxeur 18 (voir Fig. 2). Cette cuve 181 est pivotante, c'est-à-dire qu'elle peut être inclinée par rapport à la plateforme de support 10 selon un axe X transversal à la cuve 181. Ainsi, l'intérieur du malaxeur 18 peut être facilement nettoyé.The mixer 18 is placed under the drum 12 and vertically. The thermal envelope 14 makes the connection between the drum 12 and a tank 181 forming the bottom of the kneader 18 (see Fig. 2). This tank 181 is pivotable, that is to say it can be inclined relative to the support platform 10 along an axis X transverse to the tank 181. Thus, the inside of the mixer 18 can be easily cleaned.

Le malaxeur 18 comporte deux arbres 182 disposés côte à côte horizontalement de manière à entraîner l'enrobé en formation vers la sortie qui se trouve à l'extrémité la plus haute du malaxeur 18. Ces arbres 182 ont de préférence la forme de vis sans fin. Ces arbres 182 sont entraînés en rotation par un ensemble motorisé 184. Chaque arbre 182 comporte des pales 183 aptes à assurer le malaxage des produits introduits dans le malaxeur 18. Une goulotte de sortie 186 est prévue à la sortie du malaxeur 18 pour permettre à l'enrobé formé dans le malaxeur 18 d'être acheminé vers une trémie de stockage (non représentée).The mixer 18 comprises two shafts 182 arranged side by side horizontally so as to cause the asphalt forming towards the outlet which is at the highest end of the mixer 18. These shafts 182 are preferably in the form of worm . These shafts 182 are rotated by a motorized assembly 184. Each shaft 182 comprises blades 183 capable of mixing the products introduced into the mixer 18. An outlet chute 186 is provided at the outlet of the mixer 18 to allow embedded in the kneader 18 to be conveyed to a storage hopper (not shown).

Le fonctionnement du dispositif de préparation d'enrobé selon l'invention est le suivant :

  • le tambour 12 et le malaxeur 18 sont disposés l'un au-dessus de l'autre dans un même plan, si bien que les flux de matière circulant respectivement dans chacun de ces éléments sont inversés.
The operation of the asphalt preparation device according to the invention is as follows:
  • the drum 12 and the kneader 18 are arranged one above the other in the same plane, so that the flows of material flowing respectively in each of these elements are reversed.

Les agrégats A utilisés pour la fabrication de l'enrobé sont calibrés dans des dispositifs de prédosage (non représentés) et sont acheminés jusqu'à la première extrémité 12a du tambour 12, Les agrégats A, généralement utilisés à cet effet, comportent environ 5% d'humidité. Leur dimension établie par les dispositifs de prédosage est déterminée en fonction de la formule de l'enrobé à préparer.The aggregates A used for the manufacture of the mix are calibrated in pre-dosing devices (not shown) and are conveyed to the first end 12a of the drum 12. Aggregates A, generally used for this purpose, comprise about 5% humidity. Their size established by the predosage devices is determined according to the formula of the mix to be prepared.

Dans le tambour 12, les agrégats A sont entraînés en rotation et aidés par la légère pente imposée par l'inclinaison de la plateforme de support 10 et se déplacent ainsi jusqu'au brûleur 16. Durant leur déplacement tout au long du tambour 12, ils sont séchés et réchauffés jusqu'à atteindre une température comprise entre 140°C et 280°C environ. De préférence, les agrégats A seront chauffés jusqu'à une température avoisinant 280°C s'il est prévu d'ajouter exceptionnellement de l'enrobé recyclé à l'enrobé formé dans le malaxeur 18. A contrario, si cet apport d'enrobé recyclé n'est pas prévu, la température des agrégats A sera portée aux environs de 140°C.In the drum 12, the aggregates A are driven in rotation and aided by the slight slope imposed by the inclination of the support platform 10 and thus move to the burner 16. During their movement along the drum 12, they are dried and reheated to a temperature of about 140 ° C to about 280 ° C. Preferably, the aggregates A will be heated to a temperature of around 280 ° C. if it is intended to exceptionally add recycled mix to the mix formed in the mixer 18. On the other hand, if this supply of mix recycled is not expected, the temperature of aggregates A will be increased to around 140 ° C.

Les poussières d'agrégats A, aussi appelées fines ou filler, sont récupérées dans un filtre (non représenté) par l'intermédiaire d'une chambre de décompression 20.Aggregate dust A, also referred to as fines or filler, is recovered in a filter (not shown) via a decompression chamber 20.

Le filtre utilisé est de préférence un filtre de type à manche. Ce filtre est apte à aspirer et à séparer les poussières d'agrégats A circulant dans le tambour 12. Avantageusement, ce filtre permet d'aspirer les poussières dans le tambour 12 sans risquer d'aspirer d'autres substances telles que des vapeurs d'hydrocarbures dégagées par l'enrobé depuis le malaxeur 18, substances qui sont brûlées par la flamme F du brûleur 16 dans le tambour 12.The filter used is preferably a bag-type filter. This filter is able to suck up and separate the dust from aggregates A circulating in the drum 12. Advantageously, this filter makes it possible to suck up the dust in the drum 12 without the risk of sucking up other substances such as fumes. hydrocarbons released by the mix from the kneader 18, substances which are burned by the flame F of the burner 16 in the drum 12.

La chambre de décompression 20 est disposée à proximité de la première extrémité 12a du tambour 12 et communique d'une part, avec le tambour 12 et, d'autre part, avec le filtre au travers d'un conduit (non représenté) raccordé à une ouverture O prévue sur l'une de ses parois. Cette chambre de décompression 20 a pour rôle de créer une zone intermédiaire entre le tambour 12 et le filtre dans laquelle l'air et les poussières d'agrégats en suspension dans l'air du tambour 12 sont aspirées. Dans la chambre de décompression 20, la vitesse de l'air est réduite si bien que les poussières d'agrégats en suspension dans l'air, les plus lourdes, retombent. Les poussières les plus légères restent en suspension dans l'air circulant dans la chambre de décompression 20. La chambre de décompression 20 réalise ainsi une première séparation des poussières d'agrégats.The decompression chamber 20 is disposed near the first end 12a of the drum 12 and communicates on the one hand with the drum 12 and on the other hand with the filter through a duct (not shown) connected to the an opening O provided on one of its walls. This decompression chamber 20 has for role of creating an intermediate zone between the drum 12 and the filter in which air and dust aggregates suspended in the air drum 12 are sucked. In the decompression chamber 20, the velocity of the air is reduced so that the heaviest airborne aggregate dust settles down. The lightest dust remains in suspension in the air circulating in the decompression chamber 20. The decompression chamber 20 thus performs a first separation of the aggregate dust.

L'air pourvu des poussières les plus légères est aspiré de la chambre de décompression 20 vers le filtre. Dans le filtre, les poussières restées en suspension dans l'air sont filtrées. Le filtre réalise ainsi une deuxième séparation des poussières d'agrégats. Les poussières ainsi obtenues par filtrage sont stockées dans le filtre. Ces poussières constituent le filler f. Ce filler f sera introduit dans le malaxeur 18 pour fabriquer l'enrobé.The air with the lightest dust is sucked from the decompression chamber 20 to the filter. In the filter, the dust remains suspended in the air are filtered. The filter thus performs a second separation of the aggregate dust. The dust thus obtained by filtering is stored in the filter. These dusts constitute the filler f. This filler f will be introduced into the mixer 18 to manufacture the mix.

Le tambour 12 comporte des aubes 120 régulièrement réparties sur sa surface interne (voir Fig. 2). Lorsque le tambour 12 tourne, les aubes 120 entraînent les agrégats A qui sont ainsi brassés et sèchent rapidement au contact de la flamme F. Les agrégats A se déplacent ainsi de l'extrémité 12a par laquelle ils sont introduits jusqu'à la source S de la flamme F.The drum 12 has blades 120 regularly distributed on its inner surface (see Fig. 2). When the drum 12 rotates, the blades 120 drive the aggregates A which are thus stirred and dry quickly in contact with the flame F. The aggregates A and move from the end 12a through which they are introduced to the source S of the flame F.

A ce niveau, le tambour 12 communique avec le malaxeur 18 par l'intermédiaire de l'enveloppe thermique 14. Les agrégats A secs et chauffés entre 140°C et 280°C environ, sont donc déversés dans le malaxeur 18 à cet endroit.At this point, the drum 12 communicates with the mixer 18 via the thermal envelope 14. The aggregates A dry and heated between 140 ° C and 280 ° C, are therefore poured into the mixer 18 at this location.

Dans la zone du tambour 12 qui est recouverte par l'enveloppe thermique 14, d'autres produits sont introduits au travers de conduits 142 et 180 traversant l'enveloppe thermique 14. Du bitume D est notamment introduit au travers du conduit 180 et le filler f issu du filtrage est introduit dans le conduit 142. Les conduits 142 et 180 débouchent dans le malaxeur 18. D'autres produits peuvent optionnellement être introduits dans le malaxeur 18 au travers de conduits 140, 144 traversant l'enveloppe thermique 14. Ces produits sont notamment de l'enrobé recyclé B, introduit par un premier conduit 140 et des additifs C de toutes sortes tels que des fibres, de l'oxyde de fer, des colorants, du sable ou du filler d'apport composé de particules minérales finement concassées, introduits par un second conduit 144. Le filler d'apport n'est pas issu du filtrage mais d'un silo de stockage prévu à cet effet.In the region of the drum 12 which is covered by the thermal envelope 14, other products are introduced through conduits 142 and 180 through the thermal envelope 14. Bitumen D is introduced in particular through the conduit 180 and the filler f from the filtering is introduced into the conduit 142. The conduits 142 and 180 open into the mixer 18. Other products may optionally be introduced into the mixer 18 through conduits 140, 144 through the thermal envelope 14. These products are in particular recycled mix B, introduced by a first conduit 140 and additives C of all kinds such as fibers, iron oxide, dyes, sand or fill filler composed of mineral particles finely crushed, introduced by a second conduit 144. The filler filler is not derived from filtering but a storage silo provided for this purpose.

Les agrégats A tombés dans le malaxeur 18, sont d'abord mélangés avec du bitume D liquide chauffé à 160°C, introduit par le conduit 180. Le bitume D qui possède un point d'éclair à environ 220°C subit un phénomène de cracking lorsqu'il est mis en contact avec les agrégats chauds. Il y a alors dégagement de vapeur d'eau et d'hydrocarbures. La vapeur d'eau issue des agrégats A et les vapeurs d'hydrocarbure produites par le bitume D remontent vers le brûleur 16 où elles sont brûlées par la flamme F du brûleur 16. Cette remontée est obtenue grâce à un ventilateur que comporte le filtre qui crée une légère dépression dans le tambour 12. Ainsi, aucun rejet gazeux toxique n'est rejeté dans l'atmosphère.The aggregates A dropped into the kneader 18 are first mixed with liquid bitumen D heated to 160 ° C., introduced via the pipe 180. The bitumen D which has a flash point at approximately 220 ° C. undergoes a phenomenon of cracking when brought into contact with hot aggregates. There is then release of water vapor and hydrocarbons. The water vapor from the aggregates A and the hydrocarbon vapors produced by the bitumen D back to the burner 16 where they are burned by the flame F of the burner 16. This rise is obtained thanks to a fan that includes the filter which creates a slight depression in the drum 12. Thus, no toxic gas discharge is released into the atmosphere.

La pâte formée de bitume D et d'agrégats A peut ensuite avantageusement être mélangée, si on le souhaite, à l'enrobé recyclé B.The paste formed of bitumen D and aggregates A can then advantageously be mixed, if desired, with the recycled mix B.

Ensuite, le filler f issu du filtrage est introduit au travers du conduit 142 par un surpresseur jusque dans le malaxeur 18 où il se mélange à son tour avec la pâte d'enrobé en formation. Ce filler f étant vaporisé sur la pâte en formation ne forme pas de boules de fines ou inclusions dans la pâte. Réparti de manière homogène, le filler f permet d'accroître la liaison mécanique des agrégats A avec le bitume D.Then, the filler f resulting from the filtering is introduced through the conduit 142 by a booster into the mixer 18 where it mixes in turn with the asphalt paste in formation. This filler being vaporized on the dough in formation does not form balls of fines or inclusions in the dough. Distributed in a homogeneous manner, the filler f makes it possible to increase the mechanical bonding of the aggregates A with the bitumen D.

Enfin, d'autres produits ou additifs C tels que le filler d'apport peuvent être introduits dans le malaxeur 18 par l'intermédiaire du conduit 144. Ces additifs C et notamment le filler d'apport ne sont introduits qu'à la fin afin d'éviter la formation de boules de fines dans la pâte d'enrobé.Finally, other products or additives C such as filler filler may be introduced into the kneader 18 via the conduit 144. These additives C and in particular the filler filler are introduced at the end to to avoid the formation of balls of fines in the asphalt paste.

Après les différents apports dans le malaxeur 18, le malaxage de la pâte d'enrobé est poursuivi jusqu'en sortie du malaxeur 18.After the various contributions in the kneader 18, mixing the asphalt paste is continued to the output of the kneader 18.

De manière avantageuse, la vitesse de malaxage peut être réglée indépendamment de la vitesse de rotation du tambour 12 ce qui permet d'adapter le malaxage au type d'additif introduit dans le malaxeur 18.Advantageously, the kneading speed can be set independently of the rotational speed of the drum 12, which makes it possible to adapt the kneading to the type of additive introduced into the kneader 18.

Une pâte homogène d'enrobé à 160°C environ est issue du malaxeur 18 par la goulotte de sortie 186 et transportée par l'intermédiaire d'un élévateur à raclette (non représenté) jusqu'à une trémie de stockage (non représentée). Dans la trémie, l'enrobé est conservé à une température de 160°C afin de pouvoir être étalé sur les routes à une température de 130°C.A homogeneous paste of asphalt at about 160 ° C is derived from the mixer 18 through the outlet chute 186 and transported via a scraper lift (not shown) to a storage hopper (not shown). In the hopper, the asphalt is stored at a temperature of 160 ° C so that it can be spread over roads at a temperature of 130 ° C.

L'enveloppe thermique du dispositif de préparation selon l'invention permet avantageusement d'éviter les pertes de chaleur entre le tambour 12 et le malaxeur 18 et, de ce fait, permet à la fois d'obtenir un bon rendement thermique et de diminuer la quantité d'énergie nécessaire (fuel) à son fonctionnement, notamment au niveau du malaxeur 18 qui maintient une température constante de l'enrobé en formation. La destruction des vapeurs d'hydrocarbures par le brûleur permet de réduire les rejets nocifs dans l'atmosphère de manière plus importante qu'une installation classique. Cela est rendu possible grâce à la jonction créée par l'enveloppe thermique 14 entre le tambour 12 et le malaxeur 18. La quantité de bitume D nécessaire à la formation d'enrobé est par ailleurs réduite du fait de l'introduction d'enrobé recyclé dans le malaxeur. En outre, le mode d'introduction de filler f participe également à cette économie de bitume du fait de l'amélioration du malaxage qu'il fournit.The thermal envelope of the preparation device according to the invention advantageously makes it possible to avoid the heat losses between the drum 12 and the mixer 18 and, as a result, makes it possible both to obtain a good thermal efficiency and to reduce the amount of energy required (fuel) to its operation, especially at the mixer 18 which maintains a constant temperature of the asphalt formation. The destruction of hydrocarbon vapors by the burner reduces harmful emissions to the atmosphere more than a conventional installation. This is made possible thanks to the junction created by the thermal envelope 14 between the drum 12 and the mixer 18. The amount of bitumen D necessary for the formation of asphalt is also reduced because of the introduction of recycled asphalt in the mixer. In addition, the filler introduction mode f also contributes to this bitumen economy because of the improved mixing it provides.

Claims (9)

Dispositif de préparation d'enrobé en continu comprenant un tambour (12) monté rotatif autour de son axe longitudinal, un malaxeur (18) disposé sous le tambour (12), comportant un moyen de mélange rotatif (182, 183) et une enveloppe thermique (14) entourant le tambour (12), caractérisé en ce que le moyen de mélange rotatif (182, 183) du malaxeur (18) tourne indépendamment du tambour (12).Continuous mix preparation device comprising a drum (12) rotatably mounted about its longitudinal axis, a kneader (18) arranged under the drum (12), comprising a rotary mixing means (182, 183) and a thermal envelope (14) surrounding the drum (12), characterized in that the rotary mixing means (182, 183) of the mixer (18) rotates independently of the drum (12). Dispositif selon la revendication 1, caractérisé en ce que l'enveloppe thermique (14) est disposée en partie autour du tambour (12) et en partie entre le tambour (12) et le malaxeur (18) de manière à assurer la jonction entre le tambour (12) et le malaxeur (18).Device according to claim 1, characterized in that the thermal envelope (14) is arranged partly around the drum (12) and partly between the drum (12) and the mixer (18) so as to ensure the connection between the drum (12) and the mixer (18). Dispositif selon la revendication 1 ou 2, caractérisé en ce que le moyen de mélange rotatif (182, 183) est entraîné par un ensemble motorisé apte à le faire tourner à plusieurs vitesses.Device according to claim 1 or 2, characterized in that the rotary mixing means (182, 183) is driven by a motorized assembly adapted to rotate at several speeds. Dispositif selon l'une des revendications 1 à 3 caractérisé en ce que le moyen de mélange rotatif est un ensemble de deux arbres (182) disposés côte à côte et chacun pourvu à sa périphérie de pales (183).Device according to one of claims 1 to 3 characterized in that the rotary mixing means is an assembly of two shafts (182) arranged side by side and each provided at its periphery with blades (183). Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'enveloppe thermique (14) comporte des ouvertures (141, 143) permettant d'introduire par l'intermédiaire de conduits (140, 142, 144, 180) des produits directement dans le malaxeur (18).Device according to one of the preceding claims, characterized in that the thermal envelope (14) has openings (141, 143) for introducing products via conduits (140, 142, 144, 180) directly in the mixer (18). Dispositif selon l'une des revendications précédentes, caractérisé en ce que le malaxeur (18) comporte d'amont en aval une entrée pour des agrégats (A) secs issus du tambour (12), une entrée pour du bitume (D), une entrée pour de l'enrobé recyclé (B), une entrée pour du filler (f) et une entrée pour des additifs (C).Device according to one of the preceding claims, characterized in that the mixer (18) comprises, from upstream to downstream, an inlet for dry aggregates (A) coming from the drum (12), an inlet for bitumen (D), a entry for recycled mix (B), entry for filler (f) and entry for additives (C). Procédé de préparation d'enrobé en continu dans un dispositif selon la revendication 6, caractérisé en ce qu'il consiste à insérer dans l'ordre dans le malaxeur (18) : des agrégats (A) secs issus du tambour (12), puis du bitume (D) et du filler (f).Process for the preparation of continuous mix in a device according to claim 6, characterized in that it consists in inserting in order in the mixer (18): dry aggregates (A) coming from the drum (12), then bitumen (D) and filler (f). Procédé de préparation d'enrobé selon la revendication 7, caractérisé en ce qu'il consiste en outre à insérer dans le malaxeur (18) entre le bitume (D) et le filler (f) de l'enrobé recyclé (B).A method of preparing asphalt mix according to claim 7, characterized in that it further comprises inserting into the mixer (18) between the bitumen (D) and the filler (f) of the recycled mix (B). Procédé de préparation d'enrobé selon la revendication 7 ou 8, caractérisé en ce qu'il consiste en outre à insérer dans le malaxeur (18), après le filler (f), des additifs (C) tels que du filler d'apport, du sable, des colorants, des fibres.A process for the preparation of an asphalt mix according to claim 7 or 8, characterized in that it further comprises adding to the kneader (18), after the filler (f), additives (C) such as filler , sand, dyes, fibers.
EP07020986.1A 2006-10-27 2007-10-26 Device for preparing a bituminous concrete Active EP1916337B1 (en)

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EP3412829A1 (en) * 2017-06-09 2018-12-12 Ermont Facility and method for producing asphalts
CN110700042A (en) * 2019-11-07 2020-01-17 江苏集萃道路工程技术与装备研究所有限公司 Collect stirs in continuous type regeneration cylinder of an organic whole in advance by force
CN111893839A (en) * 2020-09-10 2020-11-06 新乡市路康机械有限公司 Asphalt mixture continuous production transport vehicle
WO2021232859A1 (en) * 2020-05-22 2021-11-25 福建省铁拓机械股份有限公司 Continuous recycled asphalt mixture production device

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
EP2085518A1 (en) * 2008-02-01 2009-08-05 Eurovia Method of manufacturing a bituminous coating with simultaneous insertion of the binder and a part of the solid mineral fractions in the mixer
CN104452532A (en) * 2014-11-13 2015-03-25 福建南方路面机械有限公司 Self-cleaning regenerated asphalt drying roller and self-cleaning method
CN104452532B (en) * 2014-11-13 2017-03-15 福建南方路面机械有限公司 Can self-cleaning regeneration asphalt drying drum and self cleaning method
EP3412829A1 (en) * 2017-06-09 2018-12-12 Ermont Facility and method for producing asphalts
FR3067371A1 (en) * 2017-06-09 2018-12-14 Ermont INSTALLATION AND PROCESS FOR PRODUCING COILS
CN107345385A (en) * 2017-07-27 2017-11-14 北京欧亚机械设备股份有限公司 Feeding device of drying cylinder
CN110700042A (en) * 2019-11-07 2020-01-17 江苏集萃道路工程技术与装备研究所有限公司 Collect stirs in continuous type regeneration cylinder of an organic whole in advance by force
WO2021232859A1 (en) * 2020-05-22 2021-11-25 福建省铁拓机械股份有限公司 Continuous recycled asphalt mixture production device
CN111893839A (en) * 2020-09-10 2020-11-06 新乡市路康机械有限公司 Asphalt mixture continuous production transport vehicle

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EP1916337B1 (en) 2017-05-24
ES2637503T3 (en) 2017-10-13
FR2907810A1 (en) 2008-05-02
FR2907810B1 (en) 2008-12-26

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