EP0013946B1 - Dispositif pour la préparation de mélanges bitumineux - Google Patents

Dispositif pour la préparation de mélanges bitumineux Download PDF

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Publication number
EP0013946B1
EP0013946B1 EP80100229A EP80100229A EP0013946B1 EP 0013946 B1 EP0013946 B1 EP 0013946B1 EP 80100229 A EP80100229 A EP 80100229A EP 80100229 A EP80100229 A EP 80100229A EP 0013946 B1 EP0013946 B1 EP 0013946B1
Authority
EP
European Patent Office
Prior art keywords
rotary drum
minerals
drum
mix
binder
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.)
Expired
Application number
EP80100229A
Other languages
German (de)
English (en)
Other versions
EP0013946A1 (fr
Inventor
Carl-Hermann Heise
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT80100229T priority Critical patent/ATE3161T1/de
Publication of EP0013946A1 publication Critical patent/EP0013946A1/fr
Application granted granted Critical
Publication of EP0013946B1 publication Critical patent/EP0013946B1/fr
Expired 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
    • E01C19/105—Mixing or coating by a combination of methods covered by E01C19/1018 - E01C19/104, excluding E01C19/1036
    • 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
    • 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
    • E01C2019/1095—Mixing containers having a parallel flow drum, i.e. the flow of material is parallel to the gas flow

Definitions

  • the invention relates to a device for processing bituminous mix with a removal device for minerals, a mixing device for adding thermoplastic binder and a fired rotating drum provided with internals.
  • Such a device is known from CH-A No. 567628.
  • the minerals are extracted from the corresponding silos using an extraction device.
  • the minerals should have a certain moisture and are additionally showered with water if there is insufficient moisture.
  • This aggregate with the bitumen and possibly the water is passed into a mixing drum which is heated from one end in a known manner by a burner.
  • Liquid or gaseous fuels are preferably used.
  • Special cascade throughput of the mix is achieved through special built-in components in the rotating drum. The mix is heated in cocurrent from the flue gases and via the radiant heat of the open flame of the burner.
  • the addition of water to the minerals is disadvantageous because the water has to be evaporated again at least in part.
  • a residual water content in the mix can also lead to frost damage, especially in the cold season.
  • the addition of water to the minerals also causes affinity deficiencies, i.e. the adhesion between the thermoplastic binder, for example bitumen, and the minerals is deteriorated.
  • DE-B No. 2617839 shows a device for processing bituminous mix with a rotating drum fired in direct current, which is divided into different areas with different tasks and properties. Special fittings are provided in the feed area to protect the minerals from dust formation and dust separation. In the subsequent blending area, bitumen is injected and the still moist minerals are mixed with the binder. In the process according to DE-B No.
  • the first process step is limited to the mixing of the binder with the mineral which has not yet been heated, with regard to the thermoplastic behavior of the binder, which is essentially spherical with a small binding surface and binding quality the still moist mineral particles accumulate, ie Thus, only a statistical distribution of the binder takes place, while in the second process step the minerals are heated and the essential water content is to be evaporated, the binder being intended to take on the function of water with regard to the binding of the dust particles to the rock particles.
  • the mineral material is circulated so strongly in the feed area that an unwanted premature drying occurs even before it is mixed with the binder.
  • DE-A No. 2635933 shows a device for reprocessing asphalt / aggregate mixtures, in which an axially arranged direct burner upstream of this or a radially upstream indirect burner is used in connection with a drying drum.
  • a heat barrier and at the beginning of the drying drum a distribution plate with openings arranged in a distributed manner are provided for the axial introduction of the hot gases into the drum.
  • the drum has lifting bars as internals.
  • DE-A No. 2101004 shows an apparatus for producing asphalt mix, in which a drying drum is preceded by a mixer in the form of a two-shaft trough mixer. Drying drum and mixer form two axially plug-in units. This arrangement is possible if axially on the forehead side of the drying drum, the space required for this is available.
  • the invention has for its object to develop a device of the type described above so that the mix can be largely dust-free and inexpensive to produce.
  • the affinity between the binder and the minerals must be improved, but at the same time the mixture must be heated gently so that overheating of the thermoplastic binder and premature curing are prevented.
  • a hot gas generator is provided for the known indirect firing of the rotating drum, which is arranged tangentially opening into the rotating drum, and in that the internals of the rotating drum are designed in a helical fashion for guiding the hot gases and the mixed material and to the tangential junction the hot gases are adapted.
  • the sensitive thermoplastic binder is not overheated. There is no risk of self-ignition. This also gives the opportunity to reprocess broken asphalt or other mix that has already been laid.
  • the tangential junction of the hot gas generator on the rotating drum enables longer distances for the hot gas in the drum, i.e. longer contact times with a short design. Existing dusts in the hot gas have the opportunity to combine with the bituminous mix and accumulate on it.
  • the radial component of the hot gas flow supports this separation effect.
  • the screw-shaped internals guide part of the mix in the area of the drum wall, so that it is gently processed.
  • a preferably continuously operated compulsory mixer can be provided for adding the thermoplastic binder before it enters the rotary drum.
  • This compulsory mixer brings mechanical contact between the binder and the minerals. This mechanical mixing and action results in an excellent affinity, even with a certain residual moisture in the minerals that are used undried.
  • the compulsory mixer can also be provided so as to protrude centrally into the rotary drum on the end face. This is possible because the hot gas is introduced tangentially, so that the end face of the rotary drum is free for the arrangement of the compulsory mixer.
  • the mixing of the binder and the minerals then takes place in the warm zone, so that the inherently harmful cooling of the binder is counteracted. There is no dust when mixing because the minerals are coated with the binder.
  • the compulsory mixer is indirectly heated by the hot gas generator, so that the hot gas can already give off part of its heat to the mix.
  • the interaction of the mechanical stirring movement in the compulsory mixer, the thermal heating and the subsequent further mixing with trickling effect in the rotating drum is of particular importance.
  • a conveyor for minerals not mixed with thermoplastic binder can be provided in parallel to the compulsory mixer. This results in the possibility of introducing a portion of the minerals, especially the coarser minerals, into the rotary drum without binding agents, while the finer minerals are passed through the compulsory mixer and the dust is bound with a relatively high binder content, so that one such a facility eliminates filter systems for cleaning the hot gases.
  • the parallel arrangement of this conveying device can be used both when the compulsory mixer is arranged in the end face of the rotary drum and when the compulsory mixer is somehow connected upstream of the rotary drum as a separate unit in the material flow.
  • additional lifting boxes or those with increased output can be provided on the rotary drum, in order to use the long contact times due to the tangential confluence of the hot gases particularly effectively.
  • the rotary drum 1 shows the rotary drum 1 with its end face 2.
  • a compulsory mixer 3 with the two shafts 4 is accommodated centrally in this end face 2.
  • the compulsory mixer 3 has a housing 5 enclosing it.
  • the rotary drum 1 has internally screw-shaped internals 6, which also leave an axial passage channel 7 free.
  • the helical internals 6 are attached to the inner circumference of the rotary drum 1.
  • a hot gas generator 8 also opens with a connecting pipe 9. The rotary drum 1 is therefore heated indirectly.
  • the relative position of the details to one another can be seen particularly well from FIG. It can be seen how the compulsory mixer 3 protrudes centrally into the end face of the rotary drum 1 and to a certain extent into the rotary drum. stretched in.
  • the compulsory mixer 3 has an inlet 10 for the minerals and an inlet 11 for the bitumen.
  • the helical internals 6 are particularly well recognizable by the sectional view. The material is cascaded here and in the screw threads leads through the drum moves, whereby the drum can have a comparatively short overall length.
  • the exhaust gases are discharged according to arrow 13, while a discharge belt 14 is provided for the processed bituminous mix.
  • FIG. 3 shows a section through the rotary drum 1 with the screw-shaped internals 6 and the additional lifting boxes 15, which are not shown in FIG. 2 for the sake of simplicity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Processing Of Solid Wastes (AREA)
  • Road Paving Machines (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Coke Industry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Claims (5)

1. Installation pour la préparation d'un mélange bitumineux, comportant un dispositif d'extraction de produits minéraux, un dispositif de mélange pour l'adjonction d'un liant thermoplastique et un tambour rotatif équipé de chicanes internes, caractérisée en ce qu'il est prévu pour le chauffage indirect, connu en soi, du tambour rotatif un générateur de gaz chauds qui est disposé de façon à déboucher tangentiellement dans le tambour rotatif, et en ce que les chicanes intérieures du tambour rotatif sont de forme hélicoïdale pour guider les gaz chauds et le mélange et sont adaptées à l'embouchure tangentielle des gaz chauds.
2. Installation selon la revendication 1, caractérisée en ce qu'il est prévu un mélangeur à force, entraîné de préférence de façon continue, pour l'adjonction du liant thermoplastique avant la pénétration dans le tambour rotatif.
3. Installation selon la revendication 1, caractérisée en ce qu'il est prévu un mélangeur à force, entraîné de préférence de façon continue, disposé de façon à pénétrer dans le tambour rotatif au centre de la face frontale.
4. Installation selon l'une des revendications 2 ou 3, caractérisée en ce qu'il est prévu, parallèlement au mélangeur à force, un dispositif d'alimentation de produits minéraux sans liant thermoplastique.
5. Installation selon la revendication 1, caractérisée en ce que des caissons de soulèvement supplémentaires, ou organes analogues ayant une efficacité accrue, sont prévus sur le tambour rotatif pour accroître l'action d'alimentation et l'effet de ruissellement.
EP80100229A 1979-01-29 1980-01-18 Dispositif pour la préparation de mélanges bitumineux Expired EP0013946B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100229T ATE3161T1 (de) 1979-01-29 1980-01-18 Einrichtung zum aufbereiten von bituminoesem mischgut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2903235 1979-01-29
DE2903235A DE2903235C2 (de) 1979-01-29 1979-01-29 Einrichtung zum Aufbereiten von bituminösem Mischgut

Publications (2)

Publication Number Publication Date
EP0013946A1 EP0013946A1 (fr) 1980-08-06
EP0013946B1 true EP0013946B1 (fr) 1983-04-27

Family

ID=6061588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100229A Expired EP0013946B1 (fr) 1979-01-29 1980-01-18 Dispositif pour la préparation de mélanges bitumineux

Country Status (5)

Country Link
EP (1) EP0013946B1 (fr)
JP (1) JPS55102683A (fr)
AT (1) ATE3161T1 (fr)
DE (1) DE2903235C2 (fr)
DK (1) DK33780A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106347C2 (de) * 1981-02-20 1986-09-25 Reinhard 5461 Windhagen Wirtgen Vorrichtung zur Herstellung von auftragfähigem erwärmtem Belagmaterial zum Beschichten von Straßendecken
US5320585A (en) * 1989-11-06 1994-06-14 Fukuyama Gomu Kogyo Kabushiki Kaisha Endless track belt assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE838451C (de) * 1950-02-21 1952-05-08 Camille Gabriel Henri Rieux Apparat zur Warmumhuellung von zerkleinerten oder pulverfoermigen Stoffen
US3423222A (en) * 1965-05-10 1969-01-21 Kenneth E Mcconnaughay Method of making a paving composition
FR1516830A (fr) * 1966-12-02 1968-02-05 Produits et procédés d'enrobage à l'aide de liants plastiques et hydrauliques
DE2101004A1 (de) * 1971-01-11 1972-07-27 Huther & Co, 6521 Bechtheim Verfahren und Vorrichtung zum Her stellen von Asphalt Mischgut
CH567628A5 (fr) * 1973-05-25 1975-10-15 Pavements Systems Inc
US3999743A (en) * 1975-08-11 1976-12-28 Mendenhall Robert Lamar Asphalt-aggregate recycle process and apparatus
DE2617839C3 (de) * 1976-04-23 1979-01-18 Wibau (Westdeutsche Industrie- Und Strassenbau-Maschinen-Gesellschaft Mbh), 6466 Gruendau Einrichtung zum Aufbereiten von bituminösem Mischgut mit einer im Gleichstrom befeuerten Drehtrommel

Also Published As

Publication number Publication date
DE2903235C2 (de) 1981-03-12
EP0013946A1 (fr) 1980-08-06
DK33780A (da) 1980-07-30
JPS55102683A (en) 1980-08-06
ATE3161T1 (de) 1983-05-15
DE2903235B1 (de) 1980-07-24

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