EP4173789A1 - Procédé et dispositif de fabrication de béton frais refroidi - Google Patents

Procédé et dispositif de fabrication de béton frais refroidi Download PDF

Info

Publication number
EP4173789A1
EP4173789A1 EP22200793.2A EP22200793A EP4173789A1 EP 4173789 A1 EP4173789 A1 EP 4173789A1 EP 22200793 A EP22200793 A EP 22200793A EP 4173789 A1 EP4173789 A1 EP 4173789A1
Authority
EP
European Patent Office
Prior art keywords
additive
cooled
cooling device
cooling
cryogenic refrigerant
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.)
Pending
Application number
EP22200793.2A
Other languages
German (de)
English (en)
Inventor
Gottfried Hatz
Jens Tauchmann
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.)
Messer Austria GmbH
Messer SE and Co KGaA
Original Assignee
Messer Austria GmbH
Messer SE and Co KGaA
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 Messer Austria GmbH, Messer SE and Co KGaA filed Critical Messer Austria GmbH
Publication of EP4173789A1 publication Critical patent/EP4173789A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
    • B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
    • B28C7/0038—Cooling, e.g. using ice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/0404—Proportioning
    • B28C7/0413—Proportioning two or more flows in predetermined ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/0404—Proportioning
    • B28C7/0418—Proportioning control systems therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
    • B28C7/10—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of rotary members, e.g. inclinable screws

Definitions

  • the invention relates to a method for the production of cooled fresh concrete, in which at least a first partial flow of an additive is brought into direct or indirect thermal contact with a liquefied cryogenic refrigerant in a cooling device and is thereby cooled with at least partial evaporation of the cryogenic refrigerant and the cooled additive is then is fed to a mixing device, in which it is combined with one or more other additives and with added water to produce the fresh concrete.
  • the invention also relates to a corresponding device.
  • a device and a method for the production of fresh concrete in which a second conveyor line is arranged parallel to an existing conveyor line between the storage silo and the scales or mixing device, in which a partial flow of the respective additive is branched off and in a cooling device with a cryogenic refrigerant, for example nitrogen or carbon dioxide, is brought into thermal contact.
  • the cooling device is a turbulent worm cooler or a fluidized bed reactor.
  • the invention is therefore based on the object of specifying a method and a device for the production of cooled fresh concrete, in which the efficiency of the cooling used is improved compared to methods and devices according to the prior art.
  • a method of the type and purpose mentioned at the outset is characterized in that the cryogenic refrigerant which evaporates in the cooling device when cooling the first partial flow of the additive is used at least partially to cool the water to be added and/or another additive.
  • the cold of the cryogenic refrigerant is used twice, namely for cooling the additive, for example the cement used for the production of fresh concrete, and for cooling the additive water and/or another additive, such as sand or gravel.
  • the invention thus overcomes the disadvantage of others with cryogenic Cement cooling processes that work with refrigerants, in which a significant part of the cooling energy of the refrigerant is lost unused.
  • an advantageous embodiment of the invention provides that a second partial flow of the additive is guided past the cooling device and fed to the mixing device, with the ratio of the quantities of the additive contained in the first and second partial flow being controlled as a function of a target temperature of the fresh concrete produced.
  • the additive is stored in a storage silo and two partial flows are taken to produce the fresh concrete, of which only a first partial flow is cooled.
  • the second sub-stream contains either uncooled additive or additive that has been cooled to a higher temperature, for example using conventional, non-cryogenic cooling methods, than the first sub-stream cooled with the cryogenic refrigerant.
  • the temperature of the fresh concrete produced is measured continuously or at regular time intervals, and the mixing ratio of the two partial flows is regulated as a function of the difference between the measured temperature and a specified target temperature.
  • the first partial flow of the additive is cooled to a temperature of below -50°C, preferably below -100°C, particularly preferably below -150°C.
  • the second partial flow which is not cooled with the liquefied cryogenic medium, has, for example, ambient temperature or a temperature that can be achieved using conventional cooling methods. Its temperature is preferably between 0°C and 30°C.
  • liquid nitrogen or liquid carbon dioxide is used as the cryogenic refrigerant in the cooling device.
  • cryogenic refrigerant depends on the circumstances: nitrogen enables the additive to be cooled to temperatures of down to -193°C.
  • carbon dioxide allows only a cooling down to approx. -78.5°C, but compared to nitrogen it has the advantage of a sublimation enhalpy that is about twice as large.
  • the additive to be cooled can be cement, sand or any other free-flowing additive that is required for the production of fresh concrete.
  • the cooling of the first substream can be carried out batchwise or continuously.
  • a mixer for example a twin-shaft mixer, is preferably used as the cooling device, into which a specified quantity of additive is filled and mixed for a certain period of time with the cryogenic refrigerant supplied via one or more feed lines, until a target temperature of the additive is reached is.
  • the cooled additive is then fed to the mixing device for mixing with the other additives and the additive water or is temporarily stored in an insulated container; the vaporized cryogenic refrigerant is extracted and, after passing through a filter that separates solid particles of the additive, e.g. cement dust, from the refrigerant gas, it is used to cool the additive water.
  • a conveyor device for example a conveyor screw, which continuously transports the additive in the direction of the mixing device.
  • the conveyor is equipped with a heat exchanger surface on which the additive is brought into indirect thermal contact with the cryogenic refrigerant.
  • the latter variant is structurally more complex, but has the advantage that a higher pressure can be generated on the refrigerant side of the heat exchanger surface, which consequently enables more efficient cooling of the feed water.
  • the flow rate of the feed material fed to the cooling device and/or the flow rate of the cryogenic refrigerant fed to the cooling device in To regulate depending on a measured temperature of the added water. It is essential that the feed water is not cooled to such an extent that water ice forms in the feed water tank. If the temperature of the added water falls below a predetermined minimum, the supply of cement to the cooling device can be increased and/or the supply of cryogenic refrigerant to the cooling device and/or the throughput of the cooling device can be reduced overall. This is preferably done according to a predetermined program by an automatic controller.
  • a device for the production of cooled fresh concrete with a container for added water and with at least one storage container for an additive, which storage container is flow-connected via at least one supply line to a mixing device, and with a supply line for a liquefied cryogenic refrigerant and a gas discharge line for evaporated cooling device equipped with a cryogenic refrigerant, which is integrated in the supply line between the storage tank and the mixing device or in a filling line opening into the storage tank, is characterized according to the invention in that the gas discharge line for the vaporized cryogenic refrigerant is thermally connected to the additional water stored in the tank.
  • the cooling of the feed water takes place in such a way that the vaporized cryogenic refrigerant is fed from the cooling device into the feed water.
  • the gas discharge line opens into the container at an outlet opening or at a plurality of outlet openings at an inlet device which is arranged within the liquid volume of the make-up water present in the tank when the device is in use.
  • the input device is, for example, a nozzle or lance or a hollow body equipped with a large number of outlet openings, for example in a sintered body made of metal, ceramic or plastic.
  • the cooling of the added water can also take place indirectly, on a heat exchanger arranged in the container and connected to the gas discharge line, through which the vaporized refrigerant from the cooling device is passed and thereby brought into thermal contact with the added water.
  • the gas discharge line first runs at least in part through a heat exchanger in the container flushed with added water and then opens out into the container at at least one outlet opening, so that the vaporized cryogenic refrigerant bubbles into the added water and cools it down.
  • the cooling effect is based on the still comparatively low temperature of the vaporized refrigerant and on the absorption of evaporation heat from the added water, since the refrigerant flows into the added water as a completely dry gas and absorbs water vapor as it passes through the added water.
  • the exhaust gas line runs through a heat exchanger arranged in the container upstream (seen in the direction of flow of the vaporized cryogenic refrigerant) to the outlet opening, at which the Cryogenic refrigerant first comes into indirect thermal contact with the added water and is heated up as a result. In this way, in particular, the formation of water ice at the outlet opening is reduced or completely prevented.
  • this is equipped with a non-return valve, for example directly at its outlet opening.
  • a non-return valve for example directly at its outlet opening.
  • This can be, for example, a simple flap that prevents backflow, or a valve that only opens at a predetermined minimum pressure in the gas discharge line that is above the ambient pressure or the hydrostatic pressure of the feed water.
  • the cooling device comprises a mixing device accommodated in a gas-tight and thermally insulated housing, such as a twin-shaft mixer.
  • a mixing device accommodated in a gas-tight and thermally insulated housing, such as a twin-shaft mixer.
  • a predetermined amount of additive to be cooled is mixed with the liquid cryogenic refrigerant.
  • the gas-tight housing ensures that the evaporated refrigerant does not escape, at least to a large extent, but is used to cool the added water.
  • a conveying device for the additive is provided as the cooling device, in which a heat exchanger for indirect heat exchange of the additive with the cryogenic refrigerant is arranged.
  • Additive and refrigerant do not come into direct contact in this variant, but there is only a heat transfer from the additive to the refrigerant on a heat exchanger surface of the heat exchanger.
  • the conveying device is a screw conveyor with a conveying screw accommodated in a screw housing and mounted rotatably about a shaft, which is designed in such a way that the wall of the screw housing and/or the wall of the shaft designed as a hollow shaft acts as a heat exchanger surface for thermal contact with the cryogenic refrigerant.
  • the mass flows of additive and refrigerant to the cooling device can preferably be automatically regulated by a control device according to a predetermined program as a function of measured parameters.
  • a temperature of the fresh concrete and/or a temperature of the water to be added come into consideration as parameters. In this way, the use of the refrigerant can be optimized and thus the efficiency of the device can be further improved.
  • drawing ( 1 ) shows schematically a device according to the invention for the production of cooled fresh concrete.
  • the device 1 comprises in the usual way a storage silo 2 for an additive, in the exemplary embodiment for cement.
  • the storage silo 2 is connected via a conveying line 3 to a scale 5, to which a mixing device 4 connects, which serves to mix the fresh concrete and open into the further feeds for other additives, such as sand, additives or additive water.
  • the conveyor line 3 can be either a pneumatic conveyor line or a mechanical conveyor device, for example a conveyor belt.
  • a dosing element 6 is arranged in the conveying line 3 in a manner known per se, which is, for example, a slider or a dosing screw.
  • the storage silo 2 is filled from time to time with the respective additive via a filling line 7, which can be connected to a transport vehicle, not shown here.
  • a secondary line 8 also branches off, which is also connected to the scale 5 and in which cement is also transported from the storage silo 2 pneumatically or mechanically.
  • the material flow guided through the secondary line 8 is regulated by means of a valve 9 .
  • the dosing element 6 and the valve 9 By actuating the dosing element 6 and the valve 9 , the material flow can be guided entirely or partially through the conveying line 3 or through the secondary line 8 .
  • the material flow conducted through the secondary line 8 is cooled in the manner described below.
  • the secondary line 8 opens into a cooling device 10 in which the cement is brought into direct or indirect thermal contact with a liquefied cryogenic refrigerant.
  • the cooling device 10 is a mixer equipped with a gas-tight and thermally well-insulated housing, in which the cement is intimately mixed in batches with a liquefied cryogenic refrigerant, or a conveyor device, in which the cement is transported continuously to the mixing device and at the same time is brought into direct or indirect thermal contact with the refrigerant on a heat exchanger surface, not shown here.
  • the refrigerant is liquid nitrogen, which is stored in a tank 11 and supplied via a thermally insulated refrigerant supply line 12 Cooling device 10 is funded. Due to the thorough mixing with the liquid nitrogen in the cooling device 10, the cement can be cooled down to temperatures as low as -193.degree.
  • another cryogenic refrigerant can also be used, for example liquid carbon dioxide.
  • the nitrogen evaporating during the cooling process is discharged from the cooling device 10 via a gas discharge line 13 .
  • a cooling device (not shown here), which otherwise works in the same way, can also be integrated in the filling line 7 in order to cool the cement filled into the storage silo.
  • a cooling device can be provided in addition to or instead of the cooling device 10 shown here.
  • the cooled cement is then either - not shown here - fed directly to the scales 5 via a suitable dosing element or, as in the exemplary embodiment, temporarily stored temporarily in a storage container 14 with good thermal insulation.
  • a dosing element 15 arranged on the storage container 14, for example a slide the cooled cement in the storage container 14 is supplied to the scale 5 in its entirety or in a predetermined quantity. Cooled cement from the reservoir 14 and uncooled cement from the delivery line 3 can be weighed in the scales 5 either together or independently of one another and then mixed into the mixing device 4 .
  • the added water is stored in a closed container 16 which is flow-connected to the mixing device 4 via a water line 17 .
  • the gas discharge line 13 leads into the interior of the container 16, where it runs through a heat exchanger 18, the heat exchanger surface of which is located below a water level 19 of the feed water in the container 16 when the device 1 is in operation, and finally opens out at at least one outlet opening 20 on an inlet device 21 below the Water level 19 in the container 16 from.
  • the input device 21 is, for example, a nozzle or land or around a hollow body which is equipped with a large number of orifices 20 .
  • liquid nitrogen from the tank 11 is brought into thermal contact with the cement from the secondary line 8 in the cooling device 10 and cools it down, in the process of which it evaporates itself.
  • the vaporized and still cold nitrogen i.e. at a temperature well below 0°C, passes through a filter 22, if necessary, in which any cement powder that may have been entrained is separated from the nitrogen.
  • the nitrogen in the heat exchanger 18 is then brought into indirect thermal contact with the added water in the container 16 , heating up to such an extent that its exit at the outlet opening 20 does not lead to the formation of ice at the outlet opening 20 .
  • the nitrogen gas which accumulates in the container 16 above the water level is discharged via an exhaust pipe 23 .
  • the gas discharge line 13 can optionally be equipped with a non-return fitting 24, for example a non-return valve.
  • a non-return valve 24 can be arranged upstream and/or downstream of the heat exchanger 18 or can be part of the entry device 21 .
  • the entry device can include a valve that only opens the gas discharge line 13 from a specific, predetermined excess pressure in the gas discharge line 13 compared to the hydrostatic pressure of the water in the container 16, but otherwise closes it.
  • the temperature of the fresh concrete can be adjusted to the respective requirements or customer requests.
  • the dosing elements 6, 15 are data-connected to a control unit 25, by means of which the respective quantity flows can be regulated as a function of a temperature measured by means of a sensor, not shown here, in the fresh concrete produced.
  • control unit 25 can be used to coordinate the cooling of cement and mixing water.
  • control unit 25 can be used to control the valve 9 by controlling the supply of cement and/or or the supply of liquid nitrogen to the cooling device 10 can be controlled as a function of a measured temperature of the added water in the container 16 by actuating a valve 26 in the refrigerant supply line 12 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP22200793.2A 2021-10-27 2022-10-11 Procédé et dispositif de fabrication de béton frais refroidi Pending EP4173789A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021005339.7A DE102021005339A1 (de) 2021-10-27 2021-10-27 Verfahren und Vorrichtung zur Herstellung von gekühltem Frischbeton

Publications (1)

Publication Number Publication Date
EP4173789A1 true EP4173789A1 (fr) 2023-05-03

Family

ID=83690582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22200793.2A Pending EP4173789A1 (fr) 2021-10-27 2022-10-11 Procédé et dispositif de fabrication de béton frais refroidi

Country Status (2)

Country Link
EP (1) EP4173789A1 (fr)
DE (1) DE102021005339A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537173A1 (de) * 1975-08-21 1977-03-10 Kuehl Hans Joerg Verfahren und vorrichtung zum kuehlen von frischbeton
EP0272880A1 (fr) * 1986-12-19 1988-06-29 SHIMIZU CONSTRUCTION Co. LTD. Procédé pour la fabrication de béton et dispositif à cet effet
JPS6426406A (en) * 1987-07-23 1989-01-27 Takenaka Komuten Co Manufacture of cooled concrete due to injection of low-temperature liquefied gas
JPS6426407A (en) * 1987-07-23 1989-01-27 Takenaka Komuten Co Manufacture of cooled concrete due to low-temperature liquefied gas and manufacturing device
JPH02137902A (ja) * 1988-11-18 1990-05-28 Tokyo Gas Co Ltd コンクリート練りまぜ水冷却方法および装置
JPH02169205A (ja) * 1988-12-22 1990-06-29 Toda Constr Co Ltd コンクリート配合成分の冷却装置
EP0436140A1 (fr) 1989-12-14 1991-07-10 Linde Aktiengesellschaft Procédé et dispositif de refroidissement d'une substance pulvérulente
DE4010045A1 (de) 1990-03-29 1991-10-02 Linde Ag Verfahren und vorrichtung zur kuehlung einer pulverfoermigen substanz
EP1749629A2 (fr) 2005-08-03 2007-02-07 Messer Group GmbH Procédé et dispositif pour refroidir du ciment ou des materiaux cimentaires pilvérulents
EP1749767A2 (fr) 2005-08-03 2007-02-07 Messer Group GmbH Procédé et dispositif pour refroidir du ciment ou des materiaux cimentaires pulvérulents
EP2077933A1 (fr) 2006-10-04 2009-07-15 Messer Group GmbH Procédé et dispositif de fabrication de béton frais refroidi

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005039570A1 (de) 2004-08-20 2006-03-23 Air Liquide Deutschland Gmbh Verfahren zur Herstellung von gekühltem Frischbeton
DE102006047261B4 (de) 2006-10-04 2019-06-06 Messer Group Gmbh Verfahren und Vorrichtung zur Herstellung von gekühltem Frischbeton

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537173A1 (de) * 1975-08-21 1977-03-10 Kuehl Hans Joerg Verfahren und vorrichtung zum kuehlen von frischbeton
EP0272880A1 (fr) * 1986-12-19 1988-06-29 SHIMIZU CONSTRUCTION Co. LTD. Procédé pour la fabrication de béton et dispositif à cet effet
JPH07108537B2 (ja) * 1987-07-23 1995-11-22 株式会社竹中工務店 低温液化ガスによる冷却コンクリ−トの製造方法及び製造装置
JPS6426406A (en) * 1987-07-23 1989-01-27 Takenaka Komuten Co Manufacture of cooled concrete due to injection of low-temperature liquefied gas
JPS6426407A (en) * 1987-07-23 1989-01-27 Takenaka Komuten Co Manufacture of cooled concrete due to low-temperature liquefied gas and manufacturing device
JPH02137902A (ja) * 1988-11-18 1990-05-28 Tokyo Gas Co Ltd コンクリート練りまぜ水冷却方法および装置
JPH02169205A (ja) * 1988-12-22 1990-06-29 Toda Constr Co Ltd コンクリート配合成分の冷却装置
EP0436140A1 (fr) 1989-12-14 1991-07-10 Linde Aktiengesellschaft Procédé et dispositif de refroidissement d'une substance pulvérulente
DE4010045A1 (de) 1990-03-29 1991-10-02 Linde Ag Verfahren und vorrichtung zur kuehlung einer pulverfoermigen substanz
EP1749629A2 (fr) 2005-08-03 2007-02-07 Messer Group GmbH Procédé et dispositif pour refroidir du ciment ou des materiaux cimentaires pilvérulents
EP1749767A2 (fr) 2005-08-03 2007-02-07 Messer Group GmbH Procédé et dispositif pour refroidir du ciment ou des materiaux cimentaires pulvérulents
EP2077933A1 (fr) 2006-10-04 2009-07-15 Messer Group GmbH Procédé et dispositif de fabrication de béton frais refroidi
EP2077933B1 (fr) * 2006-10-04 2012-02-01 Messer Group GmbH Procédé et dispositif de fabrication de béton frais refroidi

Also Published As

Publication number Publication date
DE102021005339A1 (de) 2023-04-27

Similar Documents

Publication Publication Date Title
DE2651871C2 (de) Verfahren und Vorrichtung zum Abkühlen von Gegenständen oder Stoffen
EP1749629B1 (fr) Procédé et dispositif pour refroidir du ciment ou des materiaux cimentaires pulvérulents
EP2077933B1 (fr) Procédé et dispositif de fabrication de béton frais refroidi
DE102007051545A1 (de) Verfahren und Vorrichtung zur Feinstmahlung von Feststoffen
EP0546359B1 (fr) Procédé de dépôt par pulvérisation thermique avec refroidissement
EP1337498B1 (fr) Procede et dispositif de preparation du beton
EP1612495B1 (fr) Procédé et dispositif de réfrigération de produits
DE4414292A1 (de) Verfahren und Anlage zur Kühlung von Weißzementklinker
EP4173791A1 (fr) Dispositif et procédé de fabrication de béton frais refroidi
EP1671100A1 (fr) Dispositif de rerigeration, notamment de cryoconservation, et mode de fonctionnement correspondant
EP4173789A1 (fr) Procédé et dispositif de fabrication de béton frais refroidi
DE102006047261B4 (de) Verfahren und Vorrichtung zur Herstellung von gekühltem Frischbeton
WO2012010705A1 (fr) Procédé et dispositif de refroidissement d'un liquide
DE19859354A1 (de) Verfahren und Vorrichtung zur Erzeugung von Metall aus Metallerzen
EP4173790A1 (fr) Dispositif de fabrication de béton frais refroidi
WO2016082827A1 (fr) Procédé de traitement de matières premières contenant de l'aluminium
DE102004062670B4 (de) Verfahren und Vorrichtung zur Kühlung von Zement
EP2368638A1 (fr) Procédé et dispositif destinés au broyage à froid
DE2626000A1 (de) Verfahren und anlage zur kuehlung von losen guetern
DE102007008811B3 (de) Verfahren und Vorrichtung zur Herstellung von gekühltem Frischbeton
DE102009029893B4 (de) Vorrichtung und Verfahren zum Kühlen und Eintragen eines riesel- oder pulverförmigen Stoffstroms in einen Lagerbehälter
DE102015009351B4 (de) Verfahren und Vorrichtung zum Herstellen von Trockeneis
DE102020103912A1 (de) Transportvorrichtung zum Befördern von Kunststoffpartikeln sowie Verfahren zum Zerkleinern von Kunststoffpartikeln
WO2001021341A1 (fr) Procede et dispositif de preparation de sable de coulee
DE10234120A1 (de) Verfahren und Vorrichtung zur Bereitstellung von gekühltem Frischbeton

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

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

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20231103

RBV Designated contracting states (corrected)

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