EP4010293A1 - Matériau granulaire expansé constitué d'un matériau minéral - Google Patents

Matériau granulaire expansé constitué d'un matériau minéral

Info

Publication number
EP4010293A1
EP4010293A1 EP20775638.8A EP20775638A EP4010293A1 EP 4010293 A1 EP4010293 A1 EP 4010293A1 EP 20775638 A EP20775638 A EP 20775638A EP 4010293 A1 EP4010293 A1 EP 4010293A1
Authority
EP
European Patent Office
Prior art keywords
temperature
sand
expanded
mineral material
grain
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
EP20775638.8A
Other languages
German (de)
English (en)
Inventor
Hartmut Kremer
Julian Neubacher
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.)
Omya International AG
Original Assignee
Binder and Co 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
Application filed by Binder and Co AG filed Critical Binder and Co AG
Publication of EP4010293A1 publication Critical patent/EP4010293A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/14—Minerals of vulcanic origin
    • C04B14/18—Perlite
    • C04B14/185—Perlite expanded
    • 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
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch

Definitions

  • the invention relates to a method for producing an expanded granulate from sand-grain-shaped, mineral material which has a bound propellant, for example an expanded granulate made of pearlite sand, the sand-grain-shaped, mineral material being introduced into a feed opening at one end of a furnace shaft, along in a conveying direction a heat treatment section, preferably by gravity, is conveyed while being conveyed through the heat treatment section to a critical temperature above which the sand-grain-shaped, mineral material becomes plastic and begins to expand due to the blowing agent and the expanded granules are discharged at another end of the furnace shaft becomes.
  • a bound propellant for example an expanded granulate made of pearlite sand
  • the invention further relates to expanded granules made of sand-grained mineral material, for example expanded granules made of pearlite sand, and the use of the expanded granules as a mineral filler in a bitumen product.
  • lightweight materials are in great demand as starting materials for various applications such as insulation technology and the finished plastering industry.
  • the lightweight materials are basically divided into petroleum-based and mineral materials.
  • Petroleum-based materials are characterized by a well-researched manufacturing process, but they have the disadvantage of being flammable.
  • mineral materials which are mainly (crystal) water-containing rocks, such as perlite, obsidian, etc., in granulate form, are not flammable.
  • research into the manufacturing process has been significantly poorer than that of petroleum-based materials. Especially with regard to the achievable qualities, the manufacturing process still seems to have a lot of development potential.
  • Furnaces in which hot combustion air is blown from bottom to top through a vertically arranged pipe have long been known from the prior art.
  • the sand grain-shaped, mineral material to be expanded is heated in the hot exhaust gas in countercurrent well above a critical temperature, which is usually between 750 ° C and 800 ° C, in rare cases above 800 ° C, above which the sand-grain-shaped, mineral material becomes plastic and the water bound in the sand-grain-shaped, mineral material evaporates.
  • the evaporation process is accompanied by the bloating of the grain of sand, mineral material.
  • EP 2697181 B1 proposes a method for the expansion of sand-grain-shaped, mineral material with which it can be ensured that the expanded granulate has a largely closed-cell surface, so that there is little or no hygroscopicity having.
  • the method described there makes use of the finding that the swelling process is an isenthalpic process.
  • the cooling of the granulate associated with the isenthalpic expansion process is detected and the temperature is reduced in a targeted manner along a remaining fall path of the expanded granulate so that there is no further expansion process.
  • the present invention is therefore based on the object of providing an expanded granulate made of mineral material which overcomes the mentioned disadvantages of the prior art.
  • the expanded granules should be versatile.
  • This object is achieved in a method for producing an expanded granulate from sand-grain-shaped, mineral material which has a bound propellant,
  • the sand-grain-shaped, mineral material is heated to a second temperature above the critical temperature after heating to the critical temperature, which second temperature is below a third temperature , from which third temperature the surface of the expanded granulate bursts and the second temperature being selected as a function of a desired density of the expanded granulate, so that part of the blowing agent remains in bound form in the granulate.
  • a surface of a puffed granulate is not considered to have cracked open and thus closed-cell if less than 15%, preferably less than 10%, particularly preferably less than 5%, of the surface of the puffed granulate has burst and the remaining surface is smooth.
  • the controlled expansion of the sand-grain-shaped, mineral material makes it possible to set the density [kg / m 3 ] or an expansion factor of the expanded granulate for fields of application relevant in practice.
  • the second temperature by selecting the second temperature accordingly, expanded granules with different densities and thus different strengths can be produced, all of which nevertheless have closed surfaces, are mechanically stable and therefore not hygroscopic.
  • expansion factor is to be understood as the ratio of the volume of the sand-grain-shaped, mineral material before the expansion process to the volume of the granules after the expansion process.
  • the "closer" the second temperature is to the critical temperature, the "less” the sand-grain-shaped mineral material is expanded, i.e. the lower the expansion factor of the granulate. In this case, part of the propellant is not used for the expansion process. This remains in bound form in the granulate.
  • the second temperature is increased, the expansion factor of the granules also increases.
  • the "closer” the second temperature is to the third temperature, the more propellant is used for the expansion process - i.e. the less propellant remains in bound form in the granulate.
  • the expansion process is controlled insofar as it reduces the residual moisture of the expanded granules, i.e. the proportion of water not used for the expansion of the starting material, which in turn allows the density of the expanded granules to be set in a targeted manner.
  • the lower the second temperature selected the higher the density of the expanded granulate.
  • the higher the second temperature selected the lower the density of the expanded granulate. Since the density is proportional to the mechanical strength, the lower the density of the expanded granulate, the lower the mechanical strength of the expanded granulate, while the higher the density of the expanded granulate, the higher the mechanical strength of the expanded granulate.
  • the expanded granulate For any practical application of the expanded granulate, that strength can always be selected for which the mechanical strength is just sufficient. This ensures that the puffed granulate is just as stable as necessary, but at the same time as light as possible.
  • the expanded granules can therefore be used in many ways and, with the aid of the method according to the invention, can be adapted to the particular application in such a way that the solution is particularly efficient.
  • the method proceeds as follows:
  • the sand-grain-shaped, mineral material is first heated to the critical temperature and then to the second temperature while it is being conveyed through the heat treatment section. From the critical temperature, the sand-grain-shaped, mineral material, which comprises numerous grains, each with a structure and a surface, becomes plastic - i.e. the sand-grained, mineral material becomes soft.
  • the majority of the sand grain-shaped mineral material begins to expand at the critical temperature.
  • “majority” is understood to mean that more than 80%, preferably more than 90%, particularly preferably more than 95%, of the abandoned sand-grain-shaped, mineral material begins to expand. Since not all grains of the abandoned sand-grain-shaped, mineral material have the same physical and chemical parameters, it cannot be completely avoided that with a certain number of grains the plasticization and thus the expansion process does not start until later than with the majority of the grains.
  • the sand-grain-shaped, mineral material applied has grains with properties that are as identical as possible, so that the heating of the sand-grained, mineral material when carrying out the method according to the invention is the same for all grains, but at least for the majority of the grains Behavior causes.
  • the second temperature lies in a range between the critical temperature and the third temperature, the surface of the granulate bursting at the third temperature.
  • the sand-grain-shaped, mineral material expands to the greatest possible extent without bursting.
  • the structure and the surfaces of the sand-grain-shaped, mineral material have a temperature-dependent viscosity. At a higher temperature, the surfaces and the bodies of the sand-grain-shaped, mineral material are less viscous, which is why the sand-grain-shaped, mineral material is expanded more by the evaporating propellant. Below the critical temperature, the viscosity is so high that the surfaces and the bodies of the sand-grain-shaped, mineral material do not become plastic and there is no swelling process. Above the third temperature, the viscosity of the body and the surfaces is again so low, and on the other hand the evaporation pressure of the propellant is so high that the surfaces of the expanded granules burst open in the course of the expansion process.
  • the viscosity of the granulate, the expansion process and, subsequently, the density and mechanical strength of the expanded granulate are set via the level of the second temperature.
  • the expansion factor or the density of the expanded granules can be adjusted in a targeted manner by the level of the second temperature in such a way that the level of the second temperature is inversely proportional to the density of the expanded granules, ie the lower the The second temperature is selected, the higher the density of the expanded granules and vice versa.
  • the density is proportional to the mechanical strength.
  • the mechanical strength of the expanded granulate is also lower, while if the density of the expanded granulate is higher, the mechanical strength of the expanded granulate is higher.
  • that strength can always be selected for which the mechanical strength is just sufficient.
  • the expanded granulate not only has the advantages associated with a closed-cell structure, but is also just as stable as necessary, but at the same time as light as possible.
  • the expanded granules are therefore versatile and can be adapted to the respective application with the aid of the method according to the invention so that the solution is particularly efficient.
  • the grains of the expanded granules with a closed-cell surface are ideally spherical, but can also have the shape of an egg, potato or the shape of several interconnected entities - similar to several interconnected soap bubbles.
  • the propellant is bound, more or less uniformly, within the volume of the grains of the granulate.
  • several expanded cells can form within a grain, which do not split off from one another, creating several interconnected entities.
  • the sand-grain-shaped, mineral material is first preheated to a preheating temperature below the critical temperature after being introduced into the furnace shaft in preparation for the expansion process, preferably not more than 750 ° C.
  • the preheating temperature can also be in the range between 500 ° C and 650 ° C.
  • the preheating is used to slowly warm up the grain of sand-shaped, mineral material down to the core before the expansion process. By heating to the preheating temperature, all layers of the sand-grain-shaped, mineral material - starting from a surface to a core - are heated slowly and not suddenly.
  • the aim is to ensure that the preheating creates a temperature profile that is as uniform as possible within the layers of the sand-grain-shaped, mineral material. Limiting the preheating temperature prevents outer layers close to the surface from swelling and forming an insulation layer before the core is heated if the temperature is too rapid to reach the critical temperature. Furthermore, the limitation of the preheating temperature serves to prevent the propellant from developing so great a pressure that the sand-grain-shaped, mineral material expands in an uncontrolled manner, whereby the surface bursts open.
  • a duration of up to Reaching the preheating temperature between 0.5 and 1.5 seconds, preferably between 0.5 and 2 seconds, particularly preferably between 0.5 and 3 seconds.
  • the starting material in the furnace shaft is slowly preheated and not suddenly heated.
  • the temperature increase until the preheating temperature is reached is preferably linear. However, it is also conceivable that the temperature rise takes place exponentially or to a limited extent until the preheating temperature is reached.
  • the heat treatment section has heating elements for emitting heat to the sand-grained, mineral material, the control from within at least 1 m, preferably within at least 2.5 m, particularly preferably from within at least 4m, measured from the feed opening, arranged heating elements with a feed temperature of at most 750 ° C takes place.
  • the start of the expansion process in the furnace shaft can be shifted as far down as possible, depending on the starting material and the density to be set. The further down the start of the bloating process, the longer and more even the preheating. In any case, it must be ensured that the remaining conveying path is sufficient to achieve the second temperature and thus the desired density.
  • the control of the heating elements located in the conveying direction after the heating elements controlled by the feed temperature takes place at a temperature that is above the feed temperature, preferably between 800 ° C and 1100 ° C. This ensures that at least the critical temperature is reached, so that a swelling process occurs.
  • the second temperature is in a range between the critical temperature and 1.5 times or 1.4 times or 1.3 times or 1.2 times or 1.1 times the critical temperature .
  • the second temperature does not exceed 1.5 times the critical temperature.
  • the second temperature which is in any case below the third temperature, it is ensured that - depending on the starting material - more than 85%, preferably more than 90%, particularly preferably more than 95%, of the expanded granules after the expansion process in the second Temperature has a closed-cell, unbroken surface.
  • the first temperature and / or the critical temperature and / or the third Temperature for a certain type of starting material is determined experimentally before it is introduced into the furnace shaft, the first and / or the critical temperature being determined, for example, with the help of a test furnace, preferably with the help of a muffle furnace.
  • the corresponding temperatures are determined experimentally - especially in the case of unknown starting materials - before the granulate is introduced into the furnace shaft.
  • the moisture content of the granulate and its decrease in mass during drying are determined.
  • the starting materials are similar (raw sand type and grain size), a new determination is not necessary.
  • the first temperature and / or the critical temperature and / or the third temperature are then determined as a function of a material class of the mineral material in the form of sand grains, on an initial grain size of the mineral material in the form of sand grains and on the mass of the blowing agent.
  • the second temperature is then selected as a function of the desired density to be achieved.
  • the blowing agent comprises water, which water is bound in the sand-grain-shaped, mineral material.
  • the sand-grain-shaped, mineral material becomes plastic at the critical temperature, whereby the evaporating water-containing propellant exerts pressure on the sand-grain-shaped, mineral material, in particular on the surface of the sand-grain-shaped, mineral material, which leads to the expansion process.
  • the supply of heat to the expanded granules is regulated in such a way that the temperature of the expanded granules does not increase any further. This prevents another swelling process, the tearing of the expanded granulate is prevented and the inflation factor set by the second temperature can be maintained.
  • a large part - ie more than 85%, preferably more than 90%, particularly preferably more than 95% - of the expanded granulate at the other end of the furnace shaft has a closed-cell surface and a density set specifically by the second temperature.
  • the puffed granules are then characterized by a lack of hygroscopicity or a hygroscopicity which is less negative in practice and high mechanical stability.
  • the heating power of the heating elements in the heating zones in the heat treatment section remaining after the expansion process is preferably successively reduced. This means that after the second temperature has been reached, the temperature of the expanded granulate drops.
  • the second temperature is only reached in a region of the heat treatment section, which region is close to the other end of the furnace shaft. This has the advantage that the number of heating elements located behind this area, viewed in the conveying direction, can be kept low.
  • the expanded granules can be used as a mineral filler in a bitumen product. This is a particularly preferred area of application for the expanded granulate with a closed-cell surface and a targeted density.
  • the weight of the bitumen product can namely be optimized without adversely affecting the sealing effect of the bitumen product.
  • the unexpanded pearlite sand A has an initial grain size in a range from 100 ⁇ m to 300 ⁇ m.
  • a critical temperature which in this embodiment is 790 ° C
  • a third temperature which is> 1080 ° C
  • Table 1 shows - purely by way of example - an overview of the correlation between the second temperature and the bulk density of the expanded granulate and its compressive strength of the pearlite A when heated to the second temperature. Table 1 also shows the values in the expanded pearlite grains A remaining residual moisture, which is due to the remaining in the expanded granules, bound propellant, eg. Water, setting, evident.
  • bound propellant eg. Water, setting
  • the pearlite sand A is first brought to the critical temperature of 790 ° C. while being conveyed through a heat treatment section and then heated to the second temperature. From the critical temperature of 790 ° C. while being conveyed through a heat treatment section and then heated to the second temperature. From the critical temperature of 790 ° C. while being conveyed through a heat treatment section and then heated to the second temperature. From the critical temperature of 790 ° C.
  • the pearlite sand A becomes plastic, whereby the water bound in the pearlite sand A, the so-called crystal water, begins to evaporate and thus acts as a blowing agent.
  • the pearlite sand A swells to a multiple of its original volume.
  • the third temperature which in this exemplary embodiment is above 1080 ° C., that is to say, for example, 1090 ° C. or 1100 ° C. or 1200 ° C.
  • the surface of the perlite A begins to burst.
  • the water that was still bound in the granulate at the beginning evaporates completely.
  • the temperature is limited to a temperature (second temperature) below the third temperature, water remains in bound form in the granulate.
  • second temperature the proportion of bound water remaining in the granulate and thus the bulk density to be achieved can be adjusted. This fact can be seen from table 1 using numerical values. Since there is proportionality between bulk density and compressive strength, you can choose the second Temperature also the compressive strength can be adjusted.
  • the lowest bulk density of 90 kg / m 3 and the lowest compressive strength of 0.15 N / mm 2 is achieved with perlite A at a second temperature of approx. 1080 ° C - this is because in this case the second temperature is very close to the third Temperature is.
  • a high bulk density of 400 kg / m 3 and a high compressive strength of 3.60 N / mm 2 of the expanded perlite A is achieved at a second temperature of 950 ° C. - in this case the second temperature is closer to the critical temperature.
  • the bulk density of the non-expanded perlite sand A (raw material) is approx. 1050 kg / m 3 , the moisture 3.66 m%, which is only intended to serve as a comparison value for the original proportion of bound water.
  • the "closer” the second temperature is to the critical temperature, the "less” the pearlite sand A is expanded. Part of the water remains in bound form in perlite A.
  • the “closer” the second temperature is to the third temperature, the more water evaporates - that is, the less water remains in bound form in perlite A.
  • the residual moisture shown in Table 1 is a measure of the water remaining after the expansion process in perlite A. With a bulk density of the expanded perlite A of 90 kg / m 3 , only 0.74 m% of bound water remains in the expanded perlite A, while with a bulk density of 400 kg / m 3 1.40 m% of bound water remains in the expanded perlite A. In this context, it should be mentioned that here The unit used for the residual moisture is percent by mass [m%].
  • the unexpanded pearlite sand B has an initial grain size in a range from 75 ⁇ m to 170 ⁇ m.
  • the statements / definitions generally made in the first exemplary embodiment with regard to critical temperature, second temperature, third temperature, bulk density, residual moisture and compressive strength and their relationship to one another also apply to the second exemplary embodiment.
  • the pearlite sand B is likewise first brought to the critical temperature of 790 ° C. while being conveyed through the heat treatment section and then heated to the second temperature. From the critical temperature of 790 ° C, the pearlite sand B also becomes plastic, whereby the water bound in the pearlite sand B begins to evaporate and thus acts as a blowing agent. When it is heated above the third temperature, which in this exemplary embodiment is above 1015 ° C., that is to say, for example, 1025 ° C. or 1050 ° C. or 1100 ° C., the surface of the perlite B begins to burst. The water that was still bound in the granulate at the beginning evaporates completely.
  • pearlite B has a lower temperature than pearlite A due to the finer initial grain size.
  • pearlite sand B achieves higher bulk densities of expanded pearlite B and thus also higher compressive strengths.
  • more than 80%, preferably more than 90%, particularly preferably more than 95%, of the raw material (e.g. pearlite sand A or pearlite sand B) at the critical temperature specified in the two exemplary embodiments begin to expand and begin to break open at the third temperature listed in the tables, in order to be able to ensure by choosing the second temperature that only part of the water bound in the raw material is used for the expansion and the rest remains in the expanded granulate.
  • the raw material e.g. pearlite sand A or pearlite sand B

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Building Environments (AREA)

Abstract

L'invention concerne un procédé de production d'un matériau granulaire expansé à partir d'un matériau minéral de type grain de sable comprenant un agent d'expansion lié, par exemple pour la production d'un matériau granulaire expansé à partir de sable de perlite. Le matériau minéral de type grain de sable est introduit dans une ouverture d'alimentation à une extrémité d'une cuve de four, transporté le long d'une section de traitement thermique dans une direction de transport, de préférence par gravité, et chauffé à une température critique tout en étant transporté à travers la section de traitement thermique, le matériau minéral de type grain de sable se plastifiant à partir de ladite température et commençant à s'expanser sous l'effet de l'agent d'expansion, et le matériau granulaire expansé est évacué à l'autre extrémité de la cuve du four. Le but de l'invention est d'améliorer la polyvalence du matériau granulaire expansé. Selon l'invention, l'objectif est atteint en ce que le matériau minéral de type grain de sable est chauffé à une deuxième température supérieure à la température critique après avoir été chauffé à la température critique, ladite deuxième température étant inférieure à une troisième température à laquelle la surface du matériau granulaire expansé éclate, et en ce que la deuxième température est sélectionnée sur la base d'une densité souhaitée du matériau granulaire expansé de sorte qu'une partie de l'agent d'expansion reste lié dans le matériau granulaire.
EP20775638.8A 2019-09-23 2020-09-23 Matériau granulaire expansé constitué d'un matériau minéral Pending EP4010293A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19199056.3A EP3795548A1 (fr) 2019-09-23 2019-09-23 Granulat expansé de matière minérale
PCT/EP2020/076555 WO2021058556A1 (fr) 2019-09-23 2020-09-23 Matériau granulaire expansé constitué d'un matériau minéral

Publications (1)

Publication Number Publication Date
EP4010293A1 true EP4010293A1 (fr) 2022-06-15

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Family Applications (2)

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EP19199056.3A Pending EP3795548A1 (fr) 2019-09-23 2019-09-23 Granulat expansé de matière minérale
EP20775638.8A Pending EP4010293A1 (fr) 2019-09-23 2020-09-23 Matériau granulaire expansé constitué d'un matériau minéral

Family Applications Before (1)

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EP19199056.3A Pending EP3795548A1 (fr) 2019-09-23 2019-09-23 Granulat expansé de matière minérale

Country Status (6)

Country Link
US (1) US20220340489A1 (fr)
EP (2) EP3795548A1 (fr)
CA (1) CA3153978C (fr)
IL (1) IL291411A (fr)
MX (1) MX2022001917A (fr)
WO (1) WO2021058556A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI4107458T3 (fi) 2020-08-21 2024-01-17 Omya Int Ag Laite paisutetun granulaatin valmistamiseksi
PL4089355T3 (pl) 2021-05-11 2024-05-13 Omya International Ag Urządzenie do wytwarzania ekspandowanego granulatu

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB558015A (en) * 1942-06-13 1943-12-15 Kenyon & Sons Ltd William A method and means for treating vermiculite and similar mineral substances
US2626872A (en) * 1948-06-02 1953-01-27 Great Lakes Carbon Corp Asphalt building board
US3765919A (en) * 1970-10-15 1973-10-16 L Gelbman Synthetic light-weight material and process and system for manufacturing same
US4519777A (en) * 1982-09-08 1985-05-28 Akhtyamov Yakub A Method and apparatus for bloating granular material
US5002696A (en) * 1988-08-01 1991-03-26 Grefco, Inc. Expanded mineral particles and apparatus and method of production
AT12878U1 (de) 2011-10-10 2013-01-15 Binder Co Ag Verfahren zum geschlossenzelligen blähen von mineralischen material
CH709866B1 (de) * 2014-07-11 2018-05-31 Adt Aero Daemm Technik Gmbh Mörtelmischung zur Wärmedämmung und/oder als Brandschutz sowie für universale Anwendungen sowie Verfahren zu ihrer Herstellung und Verwendung.
DE102017119371A1 (de) * 2017-08-24 2019-02-28 Thermprotec Gmbh Herstellung von Blähsand mit NIR

Also Published As

Publication number Publication date
US20220340489A1 (en) 2022-10-27
WO2021058556A1 (fr) 2021-04-01
MX2022001917A (es) 2022-03-17
EP3795548A1 (fr) 2021-03-24
IL291411A (en) 2022-05-01
CA3153978C (fr) 2024-06-11
CA3153978A1 (fr) 2021-04-01

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