EP2603758A1 - Procédé et dispositif de stabilisation, refroidissement et déshydratation de plâtre à stuc - Google Patents

Procédé et dispositif de stabilisation, refroidissement et déshydratation de plâtre à stuc

Info

Publication number
EP2603758A1
EP2603758A1 EP11757751.0A EP11757751A EP2603758A1 EP 2603758 A1 EP2603758 A1 EP 2603758A1 EP 11757751 A EP11757751 A EP 11757751A EP 2603758 A1 EP2603758 A1 EP 2603758A1
Authority
EP
European Patent Office
Prior art keywords
stucco
calcium sulfate
zone
cooling
ambient air
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.)
Withdrawn
Application number
EP11757751.0A
Other languages
German (de)
English (en)
Inventor
Alfred Brosig
Günther Schäfer
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.)
Grenzebach BSH GmbH
Original Assignee
Grenzebach BSH GmbH
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 Grenzebach BSH GmbH filed Critical Grenzebach BSH GmbH
Publication of EP2603758A1 publication Critical patent/EP2603758A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/028—Cooling with means to convey the charge comprising a rotary drum
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/466—Conversion of one form of calcium sulfate to another
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/007—After-treatment of the dehydration products, e.g. aging, stabilisation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • This invention relates to a process for the continuous conditioning of stucco.
  • Gypsum is the mineralogical technical name of the chemical compound of calcium sulfate dihydrate (CaS0 4 ⁇ 2 H 2 0).
  • gypsum VA loses molecules of its chemically bound water of crystallization per formula unit, the calcium sulfate dihydrate is converted to calcium sulfate hemihydrate CaS0 4 ⁇ 1 H 2 O.
  • the preparation of the alpha modification of the calcium sulfate hemihydrate is carried out from supersaturated aqueous solutions, in solutions of electrolytes of acids and salts or at elevated temperature and elevated vapor pressure in autoclaves. These conversions are typically performed using additives that affect the morphology of the resulting crystals in a desired shape.
  • the present invention relates to the stabilization, cooling and dehumidification of stucco with the aim of producing predominantly the beta-modification of the calcium sulfate hemihydrate.
  • CONFIRMATION COPY There are different methods for calcining gypsum, are classified fn according to the supply of thermal energy "indirect and direct calcination. Cooker and Drehrohrkalzinatoren fall into the category of indirect calcination process, in which the plaster is not in contact with combustion gas Located. Direct calcination, calcination in a rotary kiln, calcining in a current tube and related apparatuses, etc.
  • the directivity of the gypsum calcination, the calcination in the rotary kiln, the calcination in a current tube and related equipment For example, stucco calcined in the digester or rotary kiln calciner exhibits higher phase stability due to the lower thermal load per unit of time gypsum lasting up to several hours. In contrast, the contact time with the combustion gas in a Mahlkalzinier psychologist or during calcination in a stream tube a maximum of 20 to 30 seconds.
  • the direct calcination processes are increasingly used industrially, because the equipment is more compact and thus cheaper and because the thermal efficiency is higher. Also, the setting time of stucco is shorter, which favors the industrial production of plasterboard.
  • the desired phase for the production of gypsum mortars and gypsum boards is the calcium sulfate hemihydrate CaS0 4 ⁇ ⁇ ⁇ H 2 O, which is produced technically at a process temperature of 150 ° C to 170 ° C. If the process temperature is in a range from 180 ° C. to about 300 ° C., then the soluble calcium sulfate anhydrite (anhydrite III) is formed. The soluble anhydrite is free from crystalline water. However, soluble anhydrite converts to calcium sulfate hemihydrate in the presence of water or even water vapor. This is a reversible exothermic conversion that releases thermal energy from 210 kJ to 225 kJ per kg of calcium sulfate hemihydrate.
  • EP 1 547 984 A1 describes a method in which stucco is moistened in a rotating apparatus in order to convert the soluble calcium sulfate anhydrite to calcium sulfate hemihydrate. For this purpose, water or steam is supplied. All external equipment surfaces that are in contact with the stucco are heated to over 100 ° C. A cooling of the stucco is not provided. ,
  • WO 2008 074137 A1 also describes the supply of steam for the conditioning of stucco.
  • Stucco plaster which is in a static apparatus, is brought into contact with water vapor.
  • the water vapor pressure within the apparatus is set higher than the atmospheric pressure. Cooling and dehumidification of stucco is not provided.
  • the process of phase stabilization is discontinuous.
  • gypsum obtained by flash calcination is post calcinated in a reaction vessel while supplying hot moist gas, the residence time in the reaction vessel being much greater than in the previous flash calcination. Also in this method, cooling and dehumidification of stucco are not provided.
  • the stucco plaster obtained by one of the methods listed above is used in particular for the production of plasterboard.
  • the plasterboard is the most widely used plasterboard.
  • Between two cardboard layers is a gypsum core, which is completely enclosed by the two cardboard layers.
  • fluctuating phases in stucco cause a fluctuating demand for water and a changed setting behavior.
  • a variety of additives is in addition to the main ingredients stucco and water added to a mixer to achieve a desired setting of the stucco. Additives such as dispersants, accelerators and retarders cause the desired setting behavior.
  • the more stable the properties of a stucco the lower the need for water and additives.
  • the setting of plaster stucco is optimal when the temperature of a suspension of stucco and water is 35 ° C and does not exceed 40 ° C. For this reason, the stucco must be cooled to about 80 ° C in order to achieve an optimum suspension temperature.
  • the gypsum industry uses direct and indirect stucco cooling systems.
  • Direct cooling systems are based on direct contact with cooling air in power tubes and fluid bed coolers. Most widespread, however, has an indirect cooling system in which a rotary tube cooler is used. It is known that in a rotary tube cooler in addition to the cooling of the stucco and a certain reduction of the soluble calcium sulfate anhydrite takes place. However, hardly any reduction of calcium sulfate dihydrate takes place because the exothermic energy liberated in the conversion of soluble calcium sulfate anhydrite to calcium sulfate hemihydrate is absorbed by the cooling air.
  • the inventive method has the object to provide a method and apparatus for the production of phase-stable, dehumidified and chilled stucco, which unfolds in an energy-saving manner cost effective and technically reliable its effect.
  • this object is achieved in a method for the continuous conditioning of stucco by stucco in the form of particles from an upstream calcining a Stuckgipskühler is fed, in this first soluble calcium sulfate anhydrite to calcium sulfate hemihydrate and calcium sulfate dihydrate to calcium sulfate Hemihydrate converted and crystal defects are cured and then brought the stucco with ambient air in contact and dehumidified by this and at the same time indirectly cooled.
  • the invention provides a continuous process for the stabilization, cooling and dehumidification of stucco without water or water vapor having to be supplied for the purpose of stabilization. Also, no additional thermal energy is needed to dehumidify the stucco.
  • the stucco is introduced into the stucco cooler at a density of 0.7 to 0.9 kg / dm 3 .
  • the stucco is introduced into the reaction vessel together with process gas entrained from the calcining system.
  • the process gas preferably has a density of 0.65 to 0.7 kg / m 3 .
  • the process gas is introduced with a water vapor content of 0.25 to 0.40 kg / m 3 , based on the volume of the process gas at standard conditions.
  • the stucco plaster is first introduced through a stabilization zone arranged in the rotary tube cooler.
  • the stabilization zone is constructed in such a way that in it the water vapor released by phase exchange in the stucco is removed by the supply of the ambient air into a cooling zone arranged downstream of the stucco in the stabilization zone.
  • the ambient air is passed in countercurrent to the flow direction of the stucco over this for absorbing water vapor in order to ensure a good water absorption and a good heat transfer. It proves to be particularly advantageous if the ambient air is fed into the cooling zone at a flow rate of less than 0.1 m / s.
  • the ambient air supplied is heated by contact with the stucco to a temperature greater than 80 ° C.
  • the ambient air is deflected at a transition between the stabilization zone and the cooling zone in the flow direction of the stucco, ie by 180 ° C, and led out again from the stucco.
  • the reversal of the flow direction prevents the ambient air from extracting water vapor from the stabilization zone, which is required there to phase stabilize the stucco phases.
  • the stucco is additionally cooled indirectly by ambient air guided in cooling tubes.
  • the ambient air used for this indirect cooling is in this case heated to a temperature of up to 100 ° C.
  • a particular advantage of the method according to the invention is that the heated in the cooling tubes ambient air as cooler exhaust air can be supplied as preheated combustion air again at least one burner of the calcining, so that in this way fuel energy is saved.
  • a phase stabilization, dehumidification and cooling of the stucco takes place in two zones: First, calcium sulfate anhydrate soluble in a stabilizing zone is converted to calcium sulfate hemihydrate by absorption of water vapor and release of exothermic conversion energy; Calcium sulfate dihydrate is converted to calcium sulfate hemihydrate using the released exothermic energy, and defects of the primary calcium sulfate hemihydrate are cured.
  • the stucco which is phase-stabilized in this way, is dehumidified in the cooling zone in direct contact with ambient air and cooled in indirect contact with ambient air.
  • activated steam located between Stuckgipspumblen activated from the process gas of an upstream calcination system, the conversion of soluble calcium sulfate anhydrite to calcium sulfate hemihydrate.
  • water vapor of crystalline-bound water of the calcium sulfate dihydrate released upon conversion to calcium sulfate hemihydrate continues to convert from soluble calcium sulfate anhydrite to calcium sulfate hemihydrate.
  • the stabilization of the stucco takes place in a first zone of the device.
  • the cooling and dehumidification take place in a second zone.
  • the invention also relates to a device for carrying out the method.
  • the device is characterized in that it comprises a stucco chiller, which is designed as a rotary tube cooler and comprises a separate stabilization zone and a separate cooling zone.
  • a circumferential seal in particular at least one baffle, is provided between the stabilization zone and the cooling zone.
  • a plurality of vertical baffles are incorporated to avoid shorting the stucco flow from the stucco land chute to exiting the stabilization zone.
  • cooling tubes for indirect heat exchange between the stucco and the ambient air supplied as cooling air are provided in the cooling zone. It also proves to be advantageous if a dehumidifying tube is provided in the cooling zone, in particular in its central axis.
  • an entry chute with a seal is provided centrally in the front plate of the rotary tube cooler for introducing the stucco into the stabilization zone.
  • a simple removal of the finished stucco plaster is made possible if connect to the cooling zone stucco plaster housing and a rotary valve to remove the stucco.
  • the bearing of the rotary tube cooler is designed with races and roller bearings, one of which is designed as a fixed bearing and one, to compensate for thermal expansion as a floating floating bearing.
  • the drive of the rotary tube cooler is designed for example as a chain drive or as a sprocket gear.
  • the rotary tube cooler rotates at three to eight revolutions per minute.
  • a thermal insulation is not necessary for either the stabilization zone or the cooling zone.
  • Fig. 1 a stucco gypsum cooler according to the invention consisting of a
  • Fig. 2 shows the anhydrite III content in stucco in the starting state of a gypsum cooler with a stabilizing zone as a function of time
  • the stucco chiller shown in FIG. 1 is characterized in particular by the fact that it consists of a stabilization zone 2 and a cooling zone 3.
  • an indirectly cooled horizontal rotary tube cooler which is customary in practice is modified according to the invention in that a stabilization zone 2 has been integrated.
  • This stabilization zone 2 has inside a baffle 10, so that the injected calcined stucco A does not flow in the short circuit to the outlet of the stabilization zone 2. It is known that freshly calcined stucco A is in a fluidized state. In this fluidized state, the stucco floats on the stucco already in the stabilization zone 2. The baffle 10 prevents this short circuit and the injected calcined stucco A is mixed with the stucco present in the stabilization zone 2.
  • the fluidized state of the stucco with the associated good flow properties is also the reason why a Stuckgipseintragsschurre 1 at the entrance of the stabilization zone 2 is sufficient.
  • a feed screw is not required.
  • the injected calcined stucco A has, depending on the phase composition, a density of 2.55 to 2.65 kg / dm 3 .
  • the bulk density of the calcined stucco A is only 0.7 to 0.9 kg / dm 3 .
  • the stucco particles are surrounded by low-density process gas of 0.65 to 0.7 kg / m 3 .
  • the process gas comes from the previously installed calcining system.
  • the water vapor content in the process gas is between 0.25 and 0.4 kg / m 3 , reference being made to the volume of the process gas under standard conditions.
  • the heat of conversion of calcium sulfate dihydrate to calcium sulfate hemihydrate is 570 to 580 kJ / kg calcium sulfate hemihydrate.
  • the exothermic conversion energy of soluble calcium sulfate anhydrite to 1 kg of calcium sulfate hemihydrate involves the potential to convert calcium sulfate dihydrate (gypsum) to 0.35-0.4 kg of calcium sulfate hemihydrate.
  • 1 1 / parts of the crystal-bound water are released in calcium sulfate dihydrate. Only part of this crystal-bound water becomes the further transformation of soluble Calcium sulfate anhydrite used. This crystalline water is released until the proportion of calcium sulfate dihydrate in stucco has completely consumed.
  • An externally supplied mass of water, steam or steam-containing process gas is not necessary.
  • the residence time of the calcined stucco A in the stabilization zone 2 is 10 to 15 minutes.
  • the stucco cooler is driven by means of a chain drive 9 or a sprocket gear 9.
  • the races 8 sit on roller bearings, one of the bearings is designed as a fixed bearing.
  • the floating floating bearing compensates for changes in length caused by thermal expansion.
  • the speed of the stucco cooler is between three and eight revolutions per minute. In this case, the stucco in the stabilization zone 2 and the cooling zone 3 is gently moved. The friction between the stucco particles caused by this movement has a positive effect on the water requirement of the stucco plaster.
  • the surface of a stucco cast particulate is rough and fissured after calcination. This is especially true for stucco that was fired in a direct calcination system. Without treatment of the particle surfaces, a higher water requirement is needed to produce a suspension with the stucco. Due to the movement and friction of the stucco in the rotating stucco cooler with stabilization zone 2, the particle surface is smoothed. In the process, fine stucco particles dissolve, which have a positive effect on the particle distribution of the stucco plaster. These fine particles occupy the space between coarser stucco particles and thus reduce the water requirement for filling the gaps. Due to the high thermal load, especially in direct calcination, the Stuckgipspumble are under tension and have intercrystalline disturbances.
  • the phase change from calcium sulfate dihydrate to calcium sulfate hemihydrate using the exothermic heat of the conversion of soluble calcium sulfate anhydrite to calcium sulfate hemihydrate increases the water vapor content in the stabilization zone 2.
  • the water vapor content, which is not used for the conversion of soluble Caicium sulfate anhydrite is needed to calcium sulfate hemihydrate is to be removed.
  • This excess water vapor enter the cooling zone 3 would set by dew point undershooting condensation on the cooling tubes.
  • finely particulate solid tends to contact surfaces in contact with water. Fine stucco particles would be absorbed into the surface moisture and occupy the cooling tubes. As a result, the heat transfer would be hampered by the cooling tubes.
  • the best carrier for dehumidifying stucco is atmospheric ambient air.
  • the dehumidifying air D enters a stucco plaster housing 5 and from there into the cooling housing 3. In countercurrent to stucco, the dehumidifying D heats up to 80 ° C.
  • the flow velocity in the cooling zone 3 is less than 0.1 m / s. This heated air stream has the potential to absorb even the smallest amounts of water vapor from the stucco.
  • the flow direction of the dehumidifying air D is reversed by 180 °. This ensures that the dehumidifying air D no Water vapor from the stabilization zone 2 removes, since the water vapor is needed here for phase stabilization.
  • the dehumidifying air F loaded with steam passes to an external dust filter 12.
  • a fan 13 conveys the dedusting air F through the stucco and the dust filter 12.
  • plaster dust contained in the dehumidifying air F is returned to the stucco cooler.
  • the stucco gypsum atmospheric ambient air is used.
  • This cooling air C is sucked into a plurality of cooling pipes 11 located in the cooling zone 3.
  • the stucco gives off its heat to the cooling air C.
  • the cooling air C heats up to 100 ° C.
  • the heated cooling air C passes from the cooling tubes 11 into a cooling air collecting housing 4 and is sucked out there by means of a fan 15.
  • the heated radiator exhaust air E is dust-free and can therefore be supplied to the burners in the calcining plant as preheated combustion air.
  • the phase-stabilized, cooled and dehumidified stucco B is continuously emptied from the cooling zone 3 by means of lifting blades (not shown). Through the stucco plaster housing 5 and an external rotary valve 6, the stucco can now be removed from the outlet.
  • the continuous process according to the invention or the device according to the invention ensures that the production of phase-stable, cooled and dehumidified stucco takes place in an energy-saving and reliable manner and provides stucco of high quality.
  • the calcium sulfate anhydrite content in stucco in the starting state of the gypsum cooler is lowered to a weight percentage of less than 10% after only one and a half hours, so that in continuous operation of the stucco less than a quarter of an hour in the stabilization zone. 2 must remain in order to lower the anhydrite III content to this value.
  • the content of the calcium sulfate Hemihydrate bound crystal water (Fig. 3), which is also given in weight percent.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Furnace Details (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Drying Of Solid Materials (AREA)
  • Drying Of Gases (AREA)

Abstract

L'invention concerne un procédé de conditionnement en continu de plâtre à stuc, au cours duquel ce dernier est introduit, sous forme de particules, à partir d'une installation de calcination située en amont, dans un refroidisseur de plâtre à stuc. Dans ce refroidisseur de plâtre à stuc, l'anhydrite de sulfate de calcium soluble est transformée, tout d'abord, en semihydrate de sulfate de calcium, le dihydrate de sulfate de calcium est transformé en semihydrate de sulfate de calcium, et les défauts cristallins sont supprimés. Le plâtre à stuc est ensuite mis en contact avec l'air ambiant, et déshydraté par cet air et, en même temps, indirectement refroidi.
EP11757751.0A 2010-08-11 2011-08-10 Procédé et dispositif de stabilisation, refroidissement et déshydratation de plâtre à stuc Withdrawn EP2603758A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010033988A DE102010033988A1 (de) 2010-08-11 2010-08-11 Verfahren und Vorrichtung zur Stabilisierung, Kühlung und Entfeuchtung von Stuckgips
PCT/EP2011/004006 WO2012028251A1 (fr) 2010-08-11 2011-08-10 Procédé et dispositif de stabilisation, refroidissement et déshydratation de plâtre à stuc

Publications (1)

Publication Number Publication Date
EP2603758A1 true EP2603758A1 (fr) 2013-06-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11757751.0A Withdrawn EP2603758A1 (fr) 2010-08-11 2011-08-10 Procédé et dispositif de stabilisation, refroidissement et déshydratation de plâtre à stuc

Country Status (9)

Country Link
EP (1) EP2603758A1 (fr)
JP (1) JP2013535401A (fr)
KR (1) KR20130138193A (fr)
CN (1) CN103080684A (fr)
BR (1) BR112013003154A2 (fr)
CA (1) CA2807961A1 (fr)
DE (1) DE102010033988A1 (fr)
EA (1) EA201390211A1 (fr)
WO (1) WO2012028251A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3021805B1 (fr) 2014-05-27 2019-05-03 Commissariat A L'energie Atomique Et Aux Energies Alternatives Presse pour mettre en forme des pastilles dans un environnement restreint et hostile et procede d'assemblage de la presse
CN106145724B (zh) * 2015-04-14 2018-01-05 郑州三迪建筑科技有限公司 一种石膏加工生产线的混合输送冷却装置
CN104913644B (zh) * 2015-05-21 2017-02-01 山东鲁北企业集团总公司 一种高温煅烧生产用冷却装置
KR102454646B1 (ko) 2016-02-02 2022-10-14 요시노 셋고 가부시키가이샤 소석고 처리 장치 및 소석고 처리 방법
DK3498680T3 (da) 2016-08-10 2021-01-25 Yoshino Gypsum Co Indretning og fremgangsmåde til at behandle gips
KR102552265B1 (ko) * 2018-04-02 2023-07-06 요시노 셋고 가부시키가이샤 다관식 회전형 열교환기
CN111960699A (zh) * 2020-08-27 2020-11-20 山东新大地环保建材有限公司 基于连续性的制作熟石膏装置和方法
CN113479924B (zh) * 2021-07-29 2022-09-30 桂林理工大学 一种用于工业副产物石膏制备α高强石膏的转晶剂
DE102022004276A1 (de) 2022-11-18 2024-05-23 Grenzebach Bsh Gmbh Verfahren zum Herstellen eines Bindemittels unter Einsatz thermischer Energie und Verfahren zum Trocknen von unter Einsatz eines Bindemittels gefertigten Platten in einer Trocknungsvorrichtung

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH276080A (de) * 1949-09-20 1951-06-30 Fellner & Ziegler Gmbh Verfahren und Vorrichtung zum Betrieb von mit Einbauten versehenen Kühltrommeln für Öfen zum Brennen von Zement, Magnesit, Kalk, Gips und dgl.
DE902595C (de) * 1949-11-08 1954-01-25 Miag Vertriebs Gmbh Verfahren zum Kuehlen von heissem Brenngut und Kuehltrommel zur Durchfuehrung des Verfahrens
JPS524520B1 (fr) * 1968-07-15 1977-02-04
JPS52480B2 (fr) * 1971-11-20 1977-01-07
DE2200532A1 (de) * 1972-01-07 1973-07-12 Rheinstahl Ag Verfahren und vorrichtung zum herstellen von mehrphasengipsen
BR7307777D0 (pt) * 1973-01-17 1974-10-22 Buettner Schilde Haas Ag Tambor rotativo para a producao de anidrita ou gesso de estuque
JPS5659658A (en) * 1979-10-17 1981-05-23 Tohoku Electric Power Co Manufacture of gypsum hardened body
DE3002025A1 (de) * 1980-01-21 1981-07-23 Rigips Baustoffwerke Gmbh & Co Kg, 3452 Bodenwerder Vorrichtung zum brennen von gipx, insbesondere industriegips
DE19606075C2 (de) * 1996-02-19 2000-02-17 Sulzer Chemtech Gmbh Verfahren und Vorrichtungen zur thermischen Behandlung von Gips
JPH10323814A (ja) * 1997-05-26 1998-12-08 Matsushita Electric Works Ltd ボードの乾燥方法
DE10146179C1 (de) * 2001-09-19 2002-10-31 Babcock Bsh Gmbh Anlage zum Trocknen von Gipskartonplatten
AT412342B (de) * 2003-01-31 2005-01-25 Ernst Ing Stockhammer Kühltrommel mit stabilisierungszone
PT1547984E (pt) 2003-12-19 2006-12-29 Lafarge Platres Método e dispositivo para estabilizar reboco
US7765813B2 (en) * 2004-07-15 2010-08-03 United States Gypsum Company Apparatus and process for cooling and de-steaming calcined stucco
EP1747814A1 (fr) * 2005-07-25 2007-01-31 Claudius Peters Technologies GmbH Broyeur et procédé pour la dessiccation de matière broyée
DE102006023677A1 (de) * 2006-05-19 2007-11-22 Polysius Ag Anlage und Verfahren zur Herstellung von Zementklinker
UA99271C2 (ru) * 2006-12-20 2012-08-10 Дзе Ньюджип Корп. Способ обработки полугидрата сульфата кальция
CN201006859Y (zh) * 2006-12-30 2008-01-16 山东泰和东新股份有限公司 石膏板促凝剂制备装置
JP4657281B2 (ja) * 2007-12-28 2011-03-23 株式会社御池鐵工所 廃石膏リサイクルプラント及び廃石膏リサイクル方法
EP2116294A1 (fr) 2008-05-09 2009-11-11 Claudius Peters Technologies GmbH Procédé et installation de calcination

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012028251A1 *

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WO2012028251A1 (fr) 2012-03-08
DE102010033988A1 (de) 2012-02-16
JP2013535401A (ja) 2013-09-12
EA201390211A1 (ru) 2013-06-28
BR112013003154A2 (pt) 2016-06-28
KR20130138193A (ko) 2013-12-18
CN103080684A (zh) 2013-05-01
CA2807961A1 (fr) 2012-03-08

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