EP0562234A1 - Misch-Trocken-Trommel für die kontinuierliche Aufbereitung von bituminösem Mischgut unter Wiederverwendung von rückgewonnenem Material - Google Patents

Misch-Trocken-Trommel für die kontinuierliche Aufbereitung von bituminösem Mischgut unter Wiederverwendung von rückgewonnenem Material Download PDF

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Publication number
EP0562234A1
EP0562234A1 EP93101297A EP93101297A EP0562234A1 EP 0562234 A1 EP0562234 A1 EP 0562234A1 EP 93101297 A EP93101297 A EP 93101297A EP 93101297 A EP93101297 A EP 93101297A EP 0562234 A1 EP0562234 A1 EP 0562234A1
Authority
EP
European Patent Office
Prior art keywords
drum
cylinder
drier
aggregates
interspace
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
EP93101297A
Other languages
English (en)
French (fr)
Other versions
EP0562234B1 (de
Inventor
Antonio Cipriani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marini SpA
Original Assignee
MATRA Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MATRA Srl filed Critical MATRA Srl
Publication of EP0562234A1 publication Critical patent/EP0562234A1/de
Application granted granted Critical
Publication of EP0562234B1 publication Critical patent/EP0562234B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 drum mixer-drier for the continuous preparation of bituminous mixes with recycling of reclaimed materials.
  • Drier-mixers of the described type (hereinafter termed simply “mixers” for the sake of brevity in description) are already known. They comprise a drum with internal blades which rotates about an axis which is slightly inclined with respect to a horizontal plane; the aggregates are introduced at the upper end of the drum and, by means of the rotation of the drum, move toward the opposite lower end, where the discharge outlet is located. A burner, orientated along the axis of the drum, is arranged in said upper end and dries and heats the aggregates.
  • the bitumen inlet is located at a certain distance from the burner; the bitumen, with the addition of additives, is mixed together with the aggregates.
  • the bitumen inlet is located at a distance from the burner which is sufficient to avoid the formation of fumes.
  • the inlet for the reclaimed material generally constituted by mixes which originate from the demolition of old paving. This reclaimed material (recyclable asphalt pavement, hereinafter abbreviated as RAP) is mixed with the aggregates and the bitumen.
  • a drawback of the known mixers is the difficulty encountered in heating the aggregates to a high temperature while at the same time preventing the bitumen and the RAP from reaching temperatures which cause the formation of fumes.
  • a technical aim of the present invention is therefore to provide a drier-mixer which obviates the above described problems related to the exposure of bitumen and RAP to excessive heat.
  • a drier-mixer for the continuous preparation of bituminous mixes for pavings, characterized in that it comprises a drum which is rotatably supported about a longitudinal axis which is inclined with respect to a horizontal plane so as to have a lower end and an upper end, means for rotating said drum about said axis, a burner located at the lower end of said drum for directing a flame along said longitudinal axis toward the upper end of the drum in order to heat it internally, means for introducing aggregates at the upper end of said drum, a stationary cylinder which concentrically surrounds the lower portion of said drum and defines an annular interspace together with said portion, said cylinder having a lower end, which is proximate to the burner, and an upper end, means for introducing reclaimed bituminous material into said drum at a point which has a preset distance from the upper end of said cylinder, means for transferring said reclaimed material and said aggregates from said
  • the mixer is generally designated by the reference numeral 1 and comprises a base 2 which may be mounted on wheels for the transfer of the mixer to the work site.
  • a drum 3 is mounted on the base for rotation about the axis A.
  • the axis A is slightly inclined with respect to the horizontal plane, so that the drum has an uppermost or upper end 4 and a lower end 5.
  • the drum proximate to the ends 4 and 5, there are two hoops or annular flanges 6 and 7 which constitute two rolling tracks engaged by pairs of rollers 8 and 9 on which the drum rolls.
  • the rollers 8 and 9 are rotatable in appropriate supports fixed to the base.
  • the rotation of the drum is produced by a gearmotor 10 which is fixed to the base and is provided with an output pinion 11 on which a chain 12 is entrained; said chain is also entrained around a toothed wheel 13 which is fixed to the outside of the drum 3, thus defining a closed-loop formation.
  • the reference numeral 14 designates a cylinder which is arranged concentrically around the lower portion of the drum and defines, together with said drum, an annular interspace 15.
  • the cylinder 14 is rigidly coupled to the base 2, on which it rests by means of lateral feet 16, and comprises two flanges 17 and 18 which are at right angles to the axis A and have an annular crown shape; the inner edge of the flanges 17,18 skims or slidingly contacts the outer surface of the drum 3 so as to close the interspace 15 at its opposite ends.
  • the upper end 4 of the drum is closed by a fume expansion chamber 19, outside which a hopper 20 for feeding the aggregates is fitted; said aggregates are introduced in the drum through an opening of the chamber 19.
  • the drum is furthermore connected, by means of an opening 21 of the fume expansion chamber, to a stack 22 for aspirating the volatile substances and the dust which form during preparation of the bituminous mix.
  • RAP reclaimed material
  • the RAP is introduced into the drum through a funnel 23 which leads into an annular duct 24 located at a preset distance from the flange 18 of the cylinder 14.
  • the annular duct 24 defines, around the drum, an annular chamber 25 in which blades 26 rotate; said blades are fixed to the outside of the drum 3.
  • Openings 27 are defined on the drum between the blades 26 and allow the RAP to pass inside the drum during its rotation.
  • the blades 26 are rigidly coupled to the drum 3 at the annular chamber 25 along a band 30 which is as wide as said chamber and defines recesses 28a.
  • the recesses 28a are open towards the end 5 and are closed toward the end 4.
  • Wings 28 and 29 are rigidly coupled to the inner surface of the drum.
  • the wings 29 extend up to the end 4 and the wings 28 extend from the annular duct 24 toward the end 5, end at the level of the flange 18 and are shaped so as to cause advancement of the material in the direction B.
  • the wings 29 furthermore have a substantially L-shaped profile which, during rotation of the drum, facilitates the tipping or cascading of the material through the combustion gases and enhances heat exchange with them.
  • the wings 28 are instead shaped so as to shield the internal surface of the drum 3 from the radiant heat of the flame. They simultaneously prevent the rise of the material and thus its falling through the flame. The heat received by the wings 28 is transferred, upon each rotation of the drum 3, to the material which flows in the lower region in this portion of the drum.
  • the wings 28 are aligned, at the level of the flange 18, with openings 31 defined in the drum 3.
  • the openings 31 connect the inside of the drum to the end of the annular interspace 15 which is adjacent to the flange 18. In this manner the material can be transferred from the drum into the interspace 15.
  • the portion of the drum which extends from the flange 33 to the end 5 constitutes the combustion chamber 34, into which the flame of a burner 35, which is coaxial to the axis A, is directed.
  • the combustion chamber 34 is internally covered with a lining of ceramic fibers 36 which protects the drum against excessive temperatures.
  • the burner 35 is mounted on a flange 37 which is supported by a support 38 fixed on the base 2.
  • the flange 37 is arranged adjacent to the end 5 of the drum in order to allow rotation of the drum with respect to the burner.
  • the drum 3 is externally provided, along the portion which corresponds to the length of the cylinder 14, with fins 39 for mixing the material and conveying it toward a discharge outlet 40 located adjacent to the flange 17.
  • the outlet 40 leads into a hopper 41 provided with a discharge shutter 42.
  • the described mixer is completed by two ducts 43 and 44 for feeding bitumen and respectively additives (fillers) into the interspace 15.
  • the ducts 43 and 44 are arranged on the fixed cylinder 14 on a plane which is perpendicular to the axis A and is located downstream of the flange 18.
  • the aggregates have a temperature in the range of 150-250 o , by the time they reach the ring 24, where RAP is added; said RAP is transferred into the interspace 15 through the openings 31 together with the aggregates, after covering the portion of the blades 28.
  • the blades 39 thoroughly mix the aggregates and the RAP with bitumen and additives, added through the ducts 43 and 44 to produce a final mix which has a temperature in the range of 150-180 o and is discharged into the hopper 41 through the outlet 40.
  • the cylinder 14 creates a mixing region in which the bitumen and the materials are protected against direct exposure to the flame and kept at such a temperature as to avoid the formation of fumes.
  • the inside of the drum due to aspiration through the stack 22, is at a negative pressure, so that any gases released from the mix during mixing in the interspace 15 pass through the openings 31 into the drum, where they are burned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Drying Of Solid Materials (AREA)
EP93101297A 1992-02-04 1993-01-28 Misch-Trocken-Trommel für die kontinuierliche Aufbereitung von bituminösem Mischgut unter Wiederverwendung von rückgewonnenem Material Expired - Lifetime EP0562234B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO920032 1992-02-04
ITBO920032A IT1257637B (it) 1992-02-04 1992-02-04 Essiccatore-miscelatore a tamburo per la preparazione a ciclo continuodi conglomerati bituminosi con riciclaggio di materiali di recupero

Publications (2)

Publication Number Publication Date
EP0562234A1 true EP0562234A1 (de) 1993-09-29
EP0562234B1 EP0562234B1 (de) 1997-05-28

Family

ID=11337960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101297A Expired - Lifetime EP0562234B1 (de) 1992-02-04 1993-01-28 Misch-Trocken-Trommel für die kontinuierliche Aufbereitung von bituminösem Mischgut unter Wiederverwendung von rückgewonnenem Material

Country Status (4)

Country Link
EP (1) EP0562234B1 (de)
DE (1) DE69310972T2 (de)
ES (1) ES2104969T3 (de)
IT (1) IT1257637B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016228A1 (en) * 1994-11-24 1996-05-30 Svedala Faço Ltda. An asphalt plant
WO2011004314A1 (en) * 2009-07-09 2011-01-13 S.I.M. - Societa' Italiana Macchine S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
WO2011004316A1 (en) * 2009-07-09 2011-01-13 S.I.M. - Societa' Italiana Macchine S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
FR2986016A1 (fr) * 2012-01-25 2013-07-26 Argumat Dispositif et procede de fabrication de produits enrobes, par exemple de produits enrobes bitumineux, a plaques de protection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136966A (en) * 1974-07-15 1979-01-30 Mendenhall Robert Lamar Asphalt sleeve mixer apparatus
US4867572A (en) * 1987-09-08 1989-09-19 Astec Industries, Inc. Asphalt plant with fixed sleeve mixer
EP0347281A1 (de) * 1988-06-13 1989-12-20 Ermont. C.M. Vorrichtung zur Aufbereitung von bituminösem Mischgut in einem unbeweglichen Mixer
US5052810A (en) * 1990-02-16 1991-10-01 Astec Industries, Inc. Asphalt drum mixer with bypass temperature control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136966A (en) * 1974-07-15 1979-01-30 Mendenhall Robert Lamar Asphalt sleeve mixer apparatus
US4867572A (en) * 1987-09-08 1989-09-19 Astec Industries, Inc. Asphalt plant with fixed sleeve mixer
EP0347281A1 (de) * 1988-06-13 1989-12-20 Ermont. C.M. Vorrichtung zur Aufbereitung von bituminösem Mischgut in einem unbeweglichen Mixer
US5052810A (en) * 1990-02-16 1991-10-01 Astec Industries, Inc. Asphalt drum mixer with bypass temperature control

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016228A1 (en) * 1994-11-24 1996-05-30 Svedala Faço Ltda. An asphalt plant
CN102472021A (zh) * 2009-07-09 2012-05-23 安曼意大利股份公司 用于采用再生材料生产沥青碎石的设备的旋转干燥器
WO2011004316A1 (en) * 2009-07-09 2011-01-13 S.I.M. - Societa' Italiana Macchine S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
EP2281946A1 (de) * 2009-07-09 2011-02-09 S.I.M. Societa Italiana Macchine Trockentrommel für Anlagen für die Herstellung von bituminösem Mischgut unter Verwendung von Recyclingmaterial
EP2281944A1 (de) * 2009-07-09 2011-02-09 S.I.M. Societa Italiana Macchine Drehtrockner für Pflanzen zur Herstellung von Bitumen-Macadamen unter Verwendung recycelter Materialien
CN102472023A (zh) * 2009-07-09 2012-05-23 安曼意大利股份公司 用于采用再生材料生产沥青碎石的设备的旋转干燥器
WO2011004314A1 (en) * 2009-07-09 2011-01-13 S.I.M. - Societa' Italiana Macchine S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
CN102472023B (zh) * 2009-07-09 2014-07-02 安曼意大利股份公司 用于采用再生材料生产沥青碎石的设备的旋转干燥器
AU2010269926B2 (en) * 2009-07-09 2014-10-16 Ammann Italy S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
US8993931B2 (en) 2009-07-09 2015-03-31 Ammann Italy S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
US8993932B2 (en) 2009-07-09 2015-03-31 Ammann Italy S.P.A. Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
FR2986016A1 (fr) * 2012-01-25 2013-07-26 Argumat Dispositif et procede de fabrication de produits enrobes, par exemple de produits enrobes bitumineux, a plaques de protection
WO2013110896A1 (fr) * 2012-01-25 2013-08-01 Argumat Dispositif et procédé de fabrication de produits enrobes, par exemple de produits enrobes bitumineux, a plaques de protection
US9957674B2 (en) 2012-01-25 2018-05-01 Argumat Device and method for producing coated products, for example bituminous coated products, with protection plates

Also Published As

Publication number Publication date
IT1257637B (it) 1996-02-01
DE69310972T2 (de) 1998-07-09
EP0562234B1 (de) 1997-05-28
ES2104969T3 (es) 1997-10-16
ITBO920032A0 (it) 1992-02-04
ITBO920032A1 (it) 1993-08-04
DE69310972D1 (de) 1997-07-03

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