WO2024061687A1 - Traitement thermique de matière minérale, en particulier d'argiles, pour l'industrie du ciment, notamment pour la production de pouzzolanes artificielles - Google Patents

Traitement thermique de matière minérale, en particulier d'argiles, pour l'industrie du ciment, notamment pour la production de pouzzolanes artificielles Download PDF

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Publication number
WO2024061687A1
WO2024061687A1 PCT/EP2023/074966 EP2023074966W WO2024061687A1 WO 2024061687 A1 WO2024061687 A1 WO 2024061687A1 EP 2023074966 W EP2023074966 W EP 2023074966W WO 2024061687 A1 WO2024061687 A1 WO 2024061687A1
Authority
WO
WIPO (PCT)
Prior art keywords
calciner
preheater
control device
educt
flow divider
Prior art date
Application number
PCT/EP2023/074966
Other languages
German (de)
English (en)
Inventor
Guido Grund
Dirk Schefer
Melanie Flaßpöhler
Original Assignee
Thyssenkrupp Industrial Solutions Ag
Thyssenkrupp Ag
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
Priority claimed from LU103009A external-priority patent/LU103009B1/de
Priority claimed from DE102022209827.7A external-priority patent/DE102022209827A1/de
Application filed by Thyssenkrupp Industrial Solutions Ag, Thyssenkrupp Ag filed Critical Thyssenkrupp Industrial Solutions Ag
Publication of WO2024061687A1 publication Critical patent/WO2024061687A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/12—Natural pozzuolanas; Natural pozzuolana cements; Artificial pozzuolanas or artificial pozzuolana cements other than those obtained from waste or combustion residues, e.g. burned clay; Treating inorganic materials to improve their pozzuolanic characteristics
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/361—Condition or time responsive control in hydraulic cement manufacturing processes
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/364—Avoiding environmental pollution during cement-manufacturing
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/434—Preheating with addition of fuel, e.g. calcining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/26—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
    • F27B7/2033—Arrangements of preheating devices for the charge consisting of a single string of cyclones with means for precalcining the raw material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases

Definitions

  • the invention relates to a method for the thermal treatment of mineral material, in particular clays, and a system for this, the material properties being used at the same time to reduce the air pollutants produced during production.
  • Clays and clay-like substances are now often used, for example, to produce artificial pozzolans, which are then used in cement production.
  • One reason for this is that when producing cement clinker, for example from limestone, CO2 escapes from the raw material.
  • switching to a different starting product, currently for example clay is an important step in order to avoid emissions that are harmful to the climate.
  • a disadvantage of clays is that they contain a number of substances with different compositions.
  • a substance that often comes out of the clay during the thermal treatment of clay when the material is preheated is ammonia. Since ammonia should not (and must not) be released into the atmosphere, exhaust gas treatment is carried out downstream, which treats the exhaust gas that comes from the preheater and removes pollutants such as ammonia and/or nitrogen oxides from the exhaust gas.
  • exhaust gas purification is now state of the art and can usually be found in practically every industrial plant that carries out material treatment at higher temperatures.
  • hydrocarbons and hydrocarbon-containing compounds Another pollutant that often escapes when clays are heated are hydrocarbons and hydrocarbon-containing compounds, summarized here and below for simplicity (and neglecting other heteroatoms) under C x H y , which also have to be removed from the exhaust gas.
  • a dry process for producing cement clinker using precalcination is known from EP 0 148 090 A2.
  • the object of the invention is to provide a method which enables the thermal treatment of mineral material, in particular clays, in the most energy-saving and thus environmentally friendly way possible.
  • the method according to the invention is used to produce thermally treated mineral material, in particular clays, for example and in particular to produce artificial pozzolans for use in the cement industry.
  • the production takes place in a calciner.
  • pollutants are released that should not be released into the environment. These are, for example and in particular, ammonia NH3 and hydrocarbons as well as compounds containing hydrocarbons.
  • pollutants are usually converted in an energy-intensive manner in an exhaust gas treatment downstream of the manufacturing device and are thus removed. However, this process is energy-intensive and therefore leads to further, avoidable CCh emissions. Therefore, the pollutants released when the clay is heated are thermally converted in the calciner.
  • the calciner is at the right temperature for the decomposition of pollutants. There is also an additional, very positive effect.
  • Ammonia usually comes out of the clay. Nitrogen oxides are formed during the combustion required to generate the temperature in the calciner. The nitrogen oxides from the combustion process synproportionate with the ammonia from the clay to form nitrogen and water. This creates a double benefit and the usual, energy-intensive downstream exhaust gas treatment can even be dispensed with.
  • the mineral material in particular the clay
  • the calciner without preheating.
  • Another important aspect of the invention is that the pollutants emerging from a clay, in particular ammonia and carbon compounds, have a high calorific value and these are converted directly in the calcination, which consumes a lot of heat, and the energy is thus released at the highest and best usable energy level. It has been found that with certain clays the amount of these thermally usable pollutants can be so high that an additional supply of fuel can be dispensed with, but in most cases the fuel supply can at least be reduced. Thus, by supplying the mineral material directly and not preheated, not only is no thermal energy withdrawn from the process, but ultimately it is actually increased. Without preheating in the sense of the invention is meant a heating in which heating takes place close to the treatment temperature and this can be associated with a release of pollutants.
  • the starting material is heated, but not over a temperature window of 70 °C to 120 °C (the maximum temperature varies depending on the drying method and the starting material used).
  • the emissions of pollutants according to the invention do not yet occur, or at least not to a significant extent, so that drying alone is not critical with regard to these emissions.
  • Without preheating therefore preferably means in the sense of the invention with a temperature of at most 120 ° C.
  • a mineral material is selected which releases ammonia and/or organic carbon compounds when heated.
  • the preheater is a cascade of two to six co-current heat exchangers with cyclone separators.
  • the mineral material, in particular the clay is fed into the warmest co-current heat exchanger adjacent to the calciner.
  • the calciner is operated at a comparatively high temperature, for example and in particular between 800 ° C and 1200 ° C. In this case, the temperature in this first part of the preheater is so high that the mineral material, in particular the clay, can be reliably decomposed when heated. This allows a balance to be achieved between heat recovery and effective pollutant minimization.
  • a second mineral raw material is introduced into the preheater, with a mineral raw material being selected as the second mineral raw material which emits no or only very small amounts of pollutants during heating.
  • Typical examples are limestone, slag, blast furnace slag, Waste cement stone or sand, which are used together with artificial pozzolans in mixtures in the cement industry, for example. This means that heat recovery can be achieved with the less critical educts and at the same time complex exhaust gas cleaning can be prevented.
  • a second part of the mineral material is fed into the preheater.
  • the second part is chosen so that the resulting emissions are within the legal requirements and thus exhaust gas aftertreatment is avoided.
  • At least part of the mineral material, in particular the clay is introduced into a preheater and preheated in the preheater and from there transferred to the calciner. Therefore, the pollutants already emerge from the mineral material, in particular the clay, in the preheater and are therefore in the gas stream coming from the preheater. Therefore, the gas coming from the preheater is at least partially fed into the calciner.
  • the gas stream coming from the preheater can be fed, for example, to a combustion chamber that is connected to the calciner.
  • the pollutants also reach the calciner as with the direct introduction of the mineral material, in particular the clay, and have the same positive effect, in particular on the nitrogen oxides generated during the combustion required to generate the temperature.
  • the gas coming from the preheater is fed into the calciner via a material cooler.
  • a combustion chamber can also be arranged between the material cooler and the calciner. As a result, the heat discharged by the product from the calciner is fed back into the process.
  • the gas coming from the preheater is fed to a dedusting device, which is designed, for example, as a fabric filter, ceramic filter or electrostatic precipitator, before being fed into a combustion chamber.
  • a dedusting device which is designed, for example, as a fabric filter, ceramic filter or electrostatic precipitator, before being fed into a combustion chamber.
  • At least one reactant is supplied to the gas coming from the preheater before the gas is supplied to the calciner.
  • the reactant can be used, for example, to convert sulfur compounds, in particular to convert them into sulfate.
  • Sulfate is a desired additive in the cement industry, meaning that sulfur impurities can be used profitably in this way.
  • the calciner has a temperature between 600 ° C and 1400 ° C, preferably between 600 ° C and 1200 ° C, more preferably between 750 ° C and 1050 ° C, particularly preferably between 800 ° C and 1000 °C operated.
  • a fuel is supplied to the calciner.
  • the fuel is selected from the group comprising solid fuel, in particular coal dust, natural gas, biogas, hydrogen, ammonia, synthesis gas, liquid fuel, in particular oil. These fuels are highly energetic and allow for good firing.
  • sulfur-containing compounds from the mineral material, in particular the clay are oxidized to sulfate in the calciner.
  • Sulfates are common additives in cement, so that in this way the sulfur can be bound to create value and provide added value for the finished product. At the same time, environmentally harmful emissions are avoided.
  • the invention relates to a device for the thermal treatment of mineral material, in particular clays.
  • the device has a calciner.
  • the device also has an educt feed. It is important that the educt feed introduces mineral material, especially clay, directly into the calciner without preheating. This causes the first heating of the mineral material, especially clay, only in the calciner. This in turn causes the pollutants, in particular ammonia, hydrocarbons and hydrocarbon compounds, to be released precisely in the calciner at the high temperature of the calciner. Hydrocarbons and hydrocarbon-containing compounds are burned directly, and ammonia is converted into nitrogen and water with the nitrogen oxides produced at these high temperatures. In this way, the pollutants are converted directly in the calciner.
  • the calciner is connected directly to an exhaust gas treatment or a fume hood without an intermediate preheater.
  • the material stream is completely brought into the calciner without preheating.
  • the exhaust gas flow can already be brought to the temperature of the gas outlet of the calciner, which makes the usually necessary reheating of the exhaust gas unnecessary.
  • the invention relates to a device for the thermal treatment of mineral material, in particular clays, the device having a calciner and a preheater.
  • a gas flow divider is arranged in the gas flow leaving the preheater.
  • the gas flow divider serves to divide the gas flow into a recirculation gas flow and an exhaust air flow.
  • the gas flow divider is connected to a return line.
  • the return line serves to receive the recirculation gas stream.
  • the return line is connected to the calciner or a combustion chamber or a material cooler. This uses two effects.
  • the energy can at least partially be fed back into the process by preheating the material to be thermally treated.
  • the pollutants are at least partially transferred to the calciner via the gas divider and can be converted there become. Since complete recirculation would lead to an enrichment of, for example, the CO2 coming from the firing, part of the gas stream must also be released into the environment as an exhaust air stream.
  • the return line has a dedusting device.
  • the dedusting device is connected to a dust return line.
  • the dust return line has two ends. One end is connected to the dedusting device, the other end is connected to the calciner or preheater.
  • This also includes an indirect connection, for example the connection between the calciner and the preheater or a material feed device to the preheater or calciner. This allows the dust to be fed into the product without overheating and therefore without deactivation, for example in the combustion chamber.
  • the educt feed has an educt flow division.
  • the educt flow division is connected to a first partial duct current line and a second partial duct current line.
  • the first partial duct current line is connected to the calciner and the second partial duct current line is connected to the preheater.
  • the device has a second educt feed, wherein the second educt feed is designed to feed a second mineral raw material.
  • the second educt feed is connected to the preheater and a second mineral raw material can be fed to the preheater via the second educt feed and the return of the thermal energy from the exhaust gas of the preheater can be further improved.
  • the second mineral raw material is, for example, limestone or sand, which releases no or very little pollutants when preheated can therefore be used to recover thermal energy in the preheater without any problems.
  • the device has at least one first temperature sensor.
  • the temperature sensor is arranged in the calciner or between the calciner and preheater.
  • the device further has at least one auxiliary combustion device.
  • the auxiliary combustion device serves in particular to compensate for temperature fluctuations and is therefore usually operated with a fuel that is easy to meter and has a constant calorific value, for example gas or pulverized coal.
  • the auxiliary combustion device is arranged on the combustion chamber, between the combustion chamber and the calciner or in the calciner.
  • the device has a first control device.
  • the first control device is connected to the first temperature sensor and the auxiliary combustion device.
  • the first control device is designed to control the auxiliary combustion device depending on the temperature detected by the first temperature sensor.
  • the device has at least a first NO x analyzer.
  • the NO x analyzer detects the NO x concentration using infrared spectroscopy in an extractive measurement.
  • the NO x analyzer is arranged in the calciner or between the calciner and preheater or in the preheater or after the preheater.
  • the device has at least one educt flow divider and/or at least one second educt feed and/or a gas flow divider.
  • the device has a first control device or a second control device. The first control device or the second control device is connected to the first NO x analyzer and/or at least a first temperature sensor and the educt flow divider and/or the gas flow divider.
  • the first control device or the second control device is designed to control the educt flow division and/or the gas flow divider depending on the NO x concentration detected by the first NO x analyzer, taking into account the prevailing temperatures. This makes it possible to easily adapt to a fluctuating composition of the starting material and thus to a fluctuating release of pollutants in the process.
  • the device has at least a first organic analyzer.
  • An organic analyzer can be, for example, a flame ionization detector for detecting the concentration of hydrocarbon and hydrocarbon-containing compounds.
  • the organic analyzer is arranged in the calciner or between the calciner and preheater or in the preheater or after the preheater.
  • the device has at least one educt flow divider and/or at least one second educt feed and/or a gas flow divider.
  • the device has a first control device or a second control device.
  • the first control device or the second control device is connected to the first organic analyzer and/or at least a first temperature sensor and the educt flow divider and/or the gas flow divider.
  • the first control device or the second control device is designed to control the educt flow division and/or the gas flow divider depending on the organic concentration detected by the first organic analyzer, taking into account the prevailing temperatures. This makes it possible to easily adapt to a fluctuating composition of the starting material and thus to a fluctuating release of pollutants in the process.
  • the device has at least a first NHs analyzer.
  • the NHs analyzer is arranged in the calciner or between the calciner and preheater or in the preheater or after the preheater.
  • the device has at least one educt flow divider and/or a gas flow divider.
  • the device has a first control device or a second control device.
  • the first control device or the second control device is connected to the first NHs analyzer and/or the temperature sensor and the educt flow divider and/or the gas flow divider.
  • the first control device or the second control device is designed to control the educt flow division and/or the gas flow divider depending on the NHs concentration detected by the first NH3 analyzer and/or the temperature level detected by the temperature sensor.
  • the aforementioned devices are particularly preferably designed to carry out the method according to the invention or the method according to the invention
  • the method can particularly preferably be carried out on one of the aforementioned devices.
  • the direct educt feed 30 into the calciner 10 is shown in FIG.
  • the device does not have a preheater.
  • the gas leaving the calciner 10 is released directly as exhaust air; the educt is not preheated and heat recovered in the preheater.
  • the product leaving the calciner 10 is cooled in a material cooler 20 and leaves the device via the product stream 40.
  • Gas, for example air, is fed to the material cooler 20 via the gas supply 50 and from there preheated to the calciner 10.
  • the calciner 10 has a combustion device which is either arranged in the calciner 10 or upstream of the calciner 10.
  • the nitrogen oxides produced during combustion there are reacted with the ammonia from the clay, so that no or only tolerable emissions are produced.
  • hydrocarbons and hydrocarbon-containing compounds that come from the clay are reliably burned to a sufficient extent.
  • the lack of heat recovery in a preheater is compensated for by the fact that no additional energy has to be used for exhaust gas
  • Fig. 2 shows a second, alternative embodiment.
  • the educt is fed 30 to the preheater 70 by transferring the heat from the gas coming from the calciner 10 to the educt.
  • this leads to the release of ammonia and/or hydrocarbons and hydrocarbon-containing compounds.
  • the gas flow is passed through a gas flow divider 80 after the preheater 70.
  • a partial stream is released as exhaust air 80,
  • a further partial stream is combined with the gas supply 50 and fed to the material cooler and thus fed to the calciner 10 via the material cooler 20.
  • the nitrogen oxides generated by combustion are then converted again by ammonia released from the clay and hydrocarbons and hydrocarbon-containing compounds are also burned.
  • the preheated material is moved from the preheater 70 into the calciner 10 and, after the thermal treatment in the calciner 10, into the material cooler 20 and leaves the device as a product stream 40.
  • the third embodiment shown in Fig. 3 represents a mixed form of the first embodiment and the second embodiment.
  • the educt feed 30 takes place to an educt stream division 90.
  • the educt stream is divided and a first partial educt stream line 31 leads an unpreheated partial stream of the educt directly into the calciner 10 and a second partial educt flow line 32 leads a partial flow of the educt into the preheater 70.
  • a part is only heated in the calciner 10, so that the substances released here, in particular ammonia as well as hydrocarbons and hydrocarbon-containing compounds, can be converted directly in the calciner 10.
  • the other partial stream can recover part of the heat of the gas stream from the calciner 10 in the preheater 70.
  • This third embodiment has the advantage that an adjustment can be made using two setting options (educt flow divider 90 and gas flow divider 80). This can be useful, for example, to compensate for fluctuating emissions caused by differences in sound.
  • the preheated material is fed from the preheater 70 into the calciner 10 and combined there with the first partial duct stream. After the thermal treatment in the calciner 10, the material is brought into the material cooler 20 and leaves the device as a product stream 40.
  • FIG. 4 shows a fourth embodiment, which differs from the third embodiment in particular in that this fourth embodiment has a control device 100 which is connected to three temperature sensors 110, wherein a temperature sensor 110 is arranged in the calciner 10, a temperature sensor between the calciner 10 and preheater 70 and a further temperature sensor 110 is arranged in the calciner.
  • a temperature sensor 110 is arranged in the calciner 10
  • a temperature sensor between the calciner 10 and preheater 70 and a further temperature sensor 110 is arranged in the calciner.
  • additional temperature sensors 110 can also be present.
  • the device has a NO x analyzer 120, which detects the NO x content in the exhaust gas of the preheater 70, and an NHs analyzer 122, which corresponds to the NHs content in the exhaust gas of the preheater 70.
  • the control device 100 can in particular depending on the NO x concentration detected by the NO x analyzer 120 and the NHs concentration detected by the NHs analyzer 122 carry out control of the educt flow division 90 and/or the gas flow divider 80. This allows, for example, more educt to be introduced directly into the calciner 10 when the NO x concentration increases or more educt to be introduced into the preheater 70 in order to recover more energy at low NO x concentrations. Likewise, at high NO X concentrations, the proportion of recirculation in the gas flow divider can be increased.
  • the fourth embodiment shows a separate combustion chamber 130 in which, for example and in particular, substitute fuels, for example biomass, can be burned.
  • the calciner 10 preferably has an auxiliary combustion device (not shown here), which is preferably also controlled via the control device 100. Temperature fluctuations resulting from fluctuations in the calorific value of the substitute fuel can be detected via the temperature sensors 110 and compensated accordingly via the auxiliary combustion device.

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Abstract

La présente invention concerne un procédé de production d'argiles traitées thermiquement dans un four de calcination (10), les polluants s'échappant lors du chauffage de l'argile étant convertis thermiquement dans le four de calcination (10).
PCT/EP2023/074966 2022-09-19 2023-09-12 Traitement thermique de matière minérale, en particulier d'argiles, pour l'industrie du ciment, notamment pour la production de pouzzolanes artificielles WO2024061687A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
LU103009A LU103009B1 (de) 2022-09-19 2022-09-19 Thermische Behandlung von mineralischem Material, insbesondere Tonen, für die Zementindustrie, insbesondere zur Herstellung künstlicher Puzzolane
DE102022209827.7A DE102022209827A1 (de) 2022-09-19 2022-09-19 Thermische Behandlung von mineralischem Material, insbesondere Tonen, für die Zementindustrie, insbesondere zur Herstellung künstlicher Puzzolane
LULU103009 2022-09-19
DE102022209827.7 2022-09-19

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WO2024061687A1 true WO2024061687A1 (fr) 2024-03-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2001171A1 (de) 1970-01-13 1971-10-21 Lechler Chemie Gmbh Zusatzmittel fuer hydraulisch erhaertende anorganische Bindemittel
EP0148090A2 (fr) 1984-01-03 1985-07-10 FIVES-CAIL BABCOCK, Société anonyme Procédé de fabrication de clinker de ciment en voie sèche avec précalcination
US20120145042A1 (en) * 2010-12-13 2012-06-14 Flsmidth A/S Process for the Calcination and Manufacture of Synthetic Pozzolan
DE102011014498A1 (de) 2011-03-18 2012-09-20 Outotec Oyj Klinkerersatzstoff
WO2015082075A1 (fr) 2013-12-04 2015-06-11 Thyssenkrupp Industrial Solutions Ag Procédé de fabrication d'un substitut de clinker de ciment hydraulique latent ou puzzolanique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2001171A1 (de) 1970-01-13 1971-10-21 Lechler Chemie Gmbh Zusatzmittel fuer hydraulisch erhaertende anorganische Bindemittel
EP0148090A2 (fr) 1984-01-03 1985-07-10 FIVES-CAIL BABCOCK, Société anonyme Procédé de fabrication de clinker de ciment en voie sèche avec précalcination
US20120145042A1 (en) * 2010-12-13 2012-06-14 Flsmidth A/S Process for the Calcination and Manufacture of Synthetic Pozzolan
US9458059B2 (en) 2010-12-13 2016-10-04 Flsmidth A/S Process for the calcination and manufacture of synthetic pozzolan
DE102011014498A1 (de) 2011-03-18 2012-09-20 Outotec Oyj Klinkerersatzstoff
WO2015082075A1 (fr) 2013-12-04 2015-06-11 Thyssenkrupp Industrial Solutions Ag Procédé de fabrication d'un substitut de clinker de ciment hydraulique latent ou puzzolanique

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