EP3148954A1 - Procédé et appareil de fabrication de ciment - Google Patents

Procédé et appareil de fabrication de ciment

Info

Publication number
EP3148954A1
EP3148954A1 EP15799132.4A EP15799132A EP3148954A1 EP 3148954 A1 EP3148954 A1 EP 3148954A1 EP 15799132 A EP15799132 A EP 15799132A EP 3148954 A1 EP3148954 A1 EP 3148954A1
Authority
EP
European Patent Office
Prior art keywords
fly ash
cement
grain size
particles
approx
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Withdrawn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
EP15799132.4A
Other languages
German (de)
English (en)
Other versions
EP3148954A4 (fr
Inventor
Aino Heikkinen-Mustonen
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.)
Fatec Oy
Original Assignee
Fatec Oy
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 Fatec Oy filed Critical Fatec Oy
Publication of EP3148954A1 publication Critical patent/EP3148954A1/fr
Publication of EP3148954A4 publication Critical patent/EP3148954A4/fr
Withdrawn legal-status Critical Current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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
    • 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
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the object of the present invention is a method as defined in the preamble of claim 1 and an apparatus as defined in the preamble of claim 13 for manufacturing cement.
  • Ground limestone is used in the manufacture of cement needed for making concrete, into which ground limestone inter alia clay is mixed, and the mixture is burnt in a clinker furnace, where the material sinters into clinker comprising cement minerals.
  • the clinker nodules that are the raw material of cement are ground into cement powder, e.g. in a ball mill, and additives and agents are added to the material in conjunction with the grinding for achieving the desired properties. For example, gypsum is added to the material for regulating the setting time.
  • the rate of strength gain can be adjusted with, inter alia, the grain size of the cement powder.
  • One problem in the manufacture of cement is that it produces a considerable amount of CO 2 emissions .
  • cement powder is used to refer to ground clinker, irrespective of whether it refers to pure clinker powder or to the type of mixture in which additives and agents have been added to the clinker material before grinding or in conjunction with grinding.
  • Fly ash is already used as an agent in the manufacturing of cement according to prior art, but the results have not necessarily been sufficiently good from the viewpoint of the strength of the concrete to be obtained, because the fly ash has generally been used as it is, without grading it in any way, in which case concrete, in which ungraded fly ash has been used as an additive, has been improved in terms of quality only to some extent or not at all.
  • Cements supplemented with fly ash, in solutions according to prior art generally contain approx. 15-40% fly ash.
  • the use of untreated fly ash is typically seasonal, the amounts used are limited and, given the strict technical limit values set, the advantage to be gained has been small.
  • untreated fly ash is added, e.g. along with other agents, to the clinker material used as a raw material in the cement manufacturing process before the grinding of the cement, after which the pulverized and mixed cement powder in the grinding device is conveyed to storage and distribution.
  • One problem, among others, in these solutions is that a cement mixture with a grain size that is not, in all respects, controlled is obtained as the result of grinding. This is because inter alia there are differences between the hardnesses of the clinker material and of the various agents, e.g. the slag used as an agent can be considerably harder or softer than the clinker material. Likewise, the fly ash can have harder particles than the clinker.
  • fly ash being taken from the silo is ground before it is mixed into the cement powder.
  • the round fly ash grains are broken in conjunction with the grinding, in which case the properties of the fly ash as a cement- improving additive appreciably deteriorate.
  • the fly ash is no longer necessarily sufficiently homogeneous, which also detracts from the properties of the fly ash material.
  • the aim of the present invention is to eliminate the aforementioned drawbacks and to achieve an inexpensive and reliable method and apparatus for manufacturing high- quality cement.
  • one aim among others, is to endeavor to manufacture a cement giving strength properties and workability to the concrete made from it that are better than solutions presently known in the art.
  • one aim is to endeavor to manufacture a cement enabling less concrete made from said cement to be used in the finished product than current grades of concrete.
  • the method according to the invention is characterized by what is disclosed in the characterization part of claim 1.
  • the apparatus according to the invention is characterized by what is disclosed in the characterization part of claim 13.
  • Other embodiments of the invention are characterized by what is disclosed in the other claims.
  • a great advantage, among others, of the solution according to the invention is a reduction in the CO 2 emissions produced by the manufacture of cement, because less clinker is needed for the manufacture of cement when some of the clinker is replaced with fly ash precisely graded to a certain grain size. Replacing clinker material with fly ash does not, however, succeed so well with ungraded fly ash.
  • Concrete products made from cement manufactured with the method and apparatus according to the invention are of homogeneous quality and technically reliable, in which case the usage amount needed in the manufacture of concrete is smaller than in concrete products made from conventional cement. In this case raw material costs, transport costs and energy costs can be reduced, in which case the ecological footprint is smaller than with concrete products manufactured from conventional cement.
  • the cement particles and fly ash particles are mixed together optimally when the fly ash particles are of a controlled round shape and suitably smaller than the cement particles in which case the reaction surface area binding the particles in the mixture and boosting strength increases, and at the same time the amount of water needed decreases.
  • the result is improved consistency and strength of the concrete after a certain hardening time.
  • Fig. 1 presents a simplified and diagrammatic side view of one method and apparatus according to prior art
  • Fig. 2 presents a simplified and diagrammatic side view of one method and apparatus according to the invention
  • Fig. 3 presents a diagrammatic and simplified sample of recently mixed fresh concrete
  • Fig. 4 presents the sampling point presented with dot- and-dash lines in Fig. 3, significantly magnified and in diagrammatic form.
  • clinker which is the main raw material of cement
  • a storage container 101 from where the amount of clinker material needed at any one time is conveyed by means of conveying apparatus 102 into the clinker proportioning containers 103, from where the clinker is conveyed onwards with a conveyor apparatus 105 to the grinding apparatus 106 for grinding.
  • agents such as gypsum, slag and e.g.
  • ungraded fly ash, that are in the agent containers 104 are also added to the clinker material, which agents are transported with the conveyor apparatus 105 to the grinding apparatus 106, where both the clinker and the agents are ground together.
  • the ground and mixed cement powder is transported by means of a conveying apparatus 107 to the storage & dispensing containers 108 for cement, from which containers the finished cement powder is dispensed for distribution, e.g. into delivery vehicles 109 or distribution containers 110.
  • clinker which is the main raw material of cement
  • a storage container 1 from where the amount of clinker material needed at any one time is conveyed by means of conveying apparatus 2 into the clinker proportioning containers 3, from where the clinker is transported onwards with a conveying apparatus 6 to the grinding apparatus 7 for grinding.
  • agents in one or more agent containers such as gypsum, slag and e.g.
  • the graded fly ash that is essentially rough in terms of its grain size in agent container 4 are also added to the clinker material, which agents are transported with the aforementioned conveying apparatus 6 together with the clinker mass to the grinding apparatus 7, where both the clinker and the agents are ground together in a manner that is known in the art.
  • the average fineness (D50) of the graded rough fly ash is essentially approx. 40-60 ⁇ .
  • the proportioning apparatus 12 of fly ash comprises a weighing unit 12a and a mixing unit 12b, in which the components weighed with the weighing unit 12a are mixed together and conveyed with a conveyor apparatus 13 into the storage & dispensing containers 14 for special cement, from which the finished special cement powder is dispensed for distribution, e.g. into delivery vehicles 15 or distribution containers 16.
  • the apparatus according to the invention comprises one or more additional agent containers 5, 5a, which container (s) is/are connected by means of a conveyor apparatus 10 to the weighing unit 12a of the proportioning apparatus 12.
  • there are two additional agent containers but there can be only one or more than two, e.g. 3, 4, 5 or 6.
  • the first additional agent container 5 is pregraded fly ash of very fine grain size, having an average fineness (D50) of e.g. between 1-8 ⁇ .
  • the second additional agent container 5a can be pregraded fly ash of a rougher grain size, having an average fineness (D50) of e.g. between 8-16 ⁇
  • in the third additional agent container can be pregraded fly ash of even rougher grain size, having an average fineness (D50) of e.g. between 17-40 ⁇ , et cetera.
  • the graded fly ash particles are essentially round in shape, in which case the amount of water needed when making concrete decreases, from which follows also an increase in the strength of the concrete.
  • a large amount of essentially round fly ash particles is ensured, inter alia, by all, or at least some, of the additive containers 5, 5a containing fly ash that is unground, and therefore only graded by grain size.
  • the fly ash material in each additive container 5, 5a contains, in terms of percentage by weight, between approx. 20-80%, suitably approx, 30-70%, preferably approx. 40-60%, and e.g. roughly approx. 50% essentially round particles.
  • the pregraded, preferably unground, fly ash from additional agent container 5 or 5a, et cetera, said fly ash still containing a sufficient proportion of round particles, is conveyed by means of conveyor apparatus 10 directly to the weighing unit 12a for weighing and onwards after weighing to the mixing unit 12b, to which cement powder ground with grinding apparatus 7 is also brought, said cement powder being either completely pure clinker powder or clinker powder in which the necessary amount of possible other additives and agents has been mixed.
  • the aforementioned ground cement powder is brought either directly with the grinding apparatus 7 or is separated, e.g.
  • cement powder can also be brought directly from a storage silo or from some other storage location, in which case the cement powder is preground to the finished grain size and other necessary additives are possibly already added to it.
  • essentially unground graded fly ash of very small grain size and containing suitably round fly ash particles is mixed in suitable proportion in the mixing unit 12b into preground cement powder, in which case the strength properties and workability of the concrete made from cement powder enhanced in this way improve compared to cement according to prior art.
  • the cement powder, into which the aforementioned fine fly ash is added can contain just ground clinker, or mixed in with the clinker there can be small amounts of additives or other agents, such as gypsum.
  • additives or other agents such as gypsum.
  • slag and/or fly ash that is rougher than the aforementioned fine fly ash and that is e.g.
  • Table 1 presents an extract from one test result, in which fly ash was graded with a test device for the use of the method and of the apparatus according to the invention.
  • Product 1 is essentially ungraded coarse source material and Product 5 is the most fine-grained material of all.
  • D10 which corresponds to 10%
  • D50 which corresponds to 50%
  • D97 which corresponds to 97%
  • D100 which corresponds to 100%.
  • the decimal figures presented in the columns are the grain sizes of the fly ash material in micrometers ( ⁇ ) .
  • the aperture size of which is 4 ⁇ , i.e. in the graded product the largest grain size is 4 ⁇ .
  • a more important criterion is considered to be a grain size with the value D97, which in most cases is sufficient instead of D100, and the product is usually evaluated with the value D50, with which the average fineness of the grain size of the product is determined. From Table 1 it is seen that the average fineness D50 of Product 5 is thus 1.46 ⁇ and more than 10% of the product is of material having a grain size of below 1 ⁇ , i.e. some of the product already belongs to the nanometer scale in terms of its grain size.
  • fly ash that is selected according to exactly the correct grain size, that is unground and that contains an abundance of round fly ash particles, as an additive to cement used in concrete, among other things, improves the quality and strength of the concrete and also lowers the price of concrete and reduces the consumption of clinker needed in the concrete, in which case also the ecological footprint improves .
  • Table 2 presents an extract from one test result, in which the development of the compression strength of concrete of strength grade K40 was tested.
  • the products compared were concrete manufactured with cement according to prior art and concrete manufactured with special cement according to the invention in which very fine fly ash graded by grain size had been added to the ground clinker material.
  • Table 2 The baseline for comparison was therefore concrete manufactured from cement according to prior art (Prior Art), in the manufacture of which 300 kg of cement was used, in which cement there was no fly ash as an agent.
  • Full compression strength developed gradually in such a way that after the first day (24-hour period) the compression strength was 15 MPa and after 28 days 45 MPa.
  • only 225 kg of cement and 15 kg of very fine fly ash graded by grain size was needed for the concrete manufactured with the special cement according to the invention (Invention) for achieving the same strength properties, the fly ash being mixed into the cement powder after grinding of the clinker.
  • the missing volume could be replaced with nature's own material, i.e. sand.
  • percentages refer to percentages by weight. Since the amount of cement could be reduced for achieving the same final result and the manufacture of cement stresses the environment a lot with its CO 2 emissions, the cement mixture manufactured with the solution according to the invention is, in addition to its other advantages, also a lot more environmentally friendly than cement according to prior art.
  • fly ash that is graded into precisely the correct grain size and that contains a suitable abundance of essentially round fly ash particles is used as an additive to the cement needed in the manufacture of concrete
  • fly ash that is graded into precisely the correct grain size and that contains a suitable abundance of essentially round fly ash particles
  • the grain size of the fly ash is e.g. as follows: D50 is between 1-8 ⁇ , D97 is between 2-60 ⁇ and D100 is between 3-80 ⁇ .
  • D10 is between 0.5-2 ⁇ .
  • Table 3 presents an extract from another test result, in which the development of the compression strength of concrete was tested.
  • the products compared were concrete manufactured with cement according to prior art, in which fly ash had been added to the clinker material before the grinding of the clinker, and three concretes manufactured with special cement according to the invention, in which different percentages of very fine fly ash graded by grain size had been added to the ground clinker material, said fly ash having a grain size that was smaller than the grain size of the ground clinker material.
  • Table 3 The column Prior Art (20-25%) of Table 3 presents the compression strengths of concrete made from a cement mixture according to prior art 1, 7, 28 and 91 days after the placement of the concrete. In this case a percentage of approx. 20-25% by weight of ungraded, or very roughly graded, fly ash has been added to the clinker material before the grinding of the clinker material.
  • the column Invention 1 presents the compression strengths of concrete made from one cement mixture according to the invention 1, 7, 28 and 91 days after the placement of the concrete.
  • an amount of 20% by weight of fly ash graded according to the invention that is smaller in grain size than the grain size of the ground clinker has been added to essentially pure cement powder that is approx. 95% pure and mixed only with conventional agents, such as gypsum, but not with fly ash.
  • the fly ash is added only after the grinding of the clinker.
  • the column Invention 2 presents the compression strengths of concrete made from a second cement mixture according to the invention 1, 7, 28 and 91 days after the placement of the concrete.
  • fly ash is added in the same way as in the previous column, but now to a percentage by weight of 25% of the amount of ground clinker.
  • column Invention 3 presents the compression strengths of concrete made from a third cement mixture according to the invention 1, 28 and 91 days after the placement of the concrete.
  • fly ash is added in the same way as in the previous two columns, but now to a percentage by weight of only 5% of the amount of ground clinker.
  • the compression strength of concrete made from cement mixtures (Invention 1-3) according to the invention is substantially greater than the compression strength of concrete made from cement (Prior Art) according to prior art mixed with fly ash.
  • the cement mixture Invention 3 reaches a compression strength of 15 MPa already 24 hours after placement, i.e. a compression strength that is two times greater than concrete made from the Prior Art cement mixture.
  • Figure 3 presents a diagrammatic and simplified sample of recently mixed fresh concrete, in which is both small stones 18 and larger stones 19 as a reinforcement in a mixture of cement gel 17, presented with diagonal lines, that is the binder agent.
  • the sample of concrete according to Fig. 4 is diagrammatic and simplified and it only presents how the particles, i.e. grains 21, of fly ash graded according to the invention are situated between cement particles, i.e. cement grains 22, larger than them, condensing the structure of the cement mass functioning as a binder agent. Without fly ash grains 21 smaller in size than the cement grains 22, an unnecessary abundance of empty space, e.g. approx. 2-15%, would remain between the cement grains 22, which empty space weakens the structure.
  • Fly ash that is smaller- grained than the cement grains 22 and that is correctly selected by grain size for the intended use and is used as an additive to the cement thus physically increases the reaction surface area of the particles of the mixture and thereby the strength of the cement and in this way strengthens concrete manufactured from cement to which the fly ash has been added, and the concrete becomes more workable and placeable.
  • particles of small grain size replace the amount of water and cement to be used, because the empty spaces of the cement grains 22 would otherwise be filed with a cement-water mixture. This property also helps to save cement as a raw material.
  • drying cracks decrease and frost resistance improves when using small fly ash particles 21 that are pregraded by grain size mixed in with the cement particles 22.
  • fly ash that is ungraded by grain size is added to the clinker material before the grinding of the clinker material.
  • fly ash of the correct size in terms of grain size with respect to the properties of the cement grade being manufactured at that particular time.
  • fly ash that is of precisely the correct grain size that is preferably unground and that contains a suitable abundance of round fly ash grains is added to clinker material, in which are small amounts of additives and agents possibly needed, only after grinding of the material, in which case the grain size of the fly ash to be used depends on the intended use of the cement to be manufactured.
  • Average grain size (D50) is used in the definition of the grain size of both the fly ash and the cement powder.
  • fly ash grains 21 smaller than the cement grains 22 are mixed into cement made for the manufacture of concrete to fill the empty spaces between the cement grains 22.
  • the solution according to the invention comprises at least one extra agent container 5 of fly ash, the container containing fly ash that is graded by grain size, is preferably unground and contains a sufficient abundance of essentially round fly ash particles, the grain size of the particles 21 of which fly ash are, in terms of their average fineness (D50), between approx. ( 0.1...0.8 ) *grain size of the particles 22 of clinker material, suitably approx. ( 0.2...0.7 ) *grain size of the particles 22 of clinker material, preferably approx.
  • Suitable fly ash from the additional agent container 5, 5a, et cetera is added to the grade of cement being manufactured at the time in such a way that essentially unground fly ash pregraded by grain size is added to the clinker material after the grinding of the clinker material, said fly ash containing a percentage by weight of essentially round fly ash particles of approx. 20-80%, suitably approx. 30-70%, preferably approx. 40-60% or e.g. roughly approx. 50%.
  • the grain size of the aforementioned fly ash particles 21 are, in terms of their average fineness (D50), smaller than the ground clinker material of the cement mixture being manufactured at any given time, i.e. smaller than the corresponding grain size according to the average particle size (D50) of the particles 22 of the cement powder .
  • fly ash that is precisely pregraded and selected by grain size, and also preferably unground, is mixed with the grinding apparatus 7 into the ground clinker material, i.e. into cement powder containing approx. 0-4% of possibly necessary additives and agents, to a percentage by weight of e.g. either approx. 2-40% of the amount of the material, or only approx. 2-25% of the amount of the material, or e.g. 3-14%, suitably e.g. approx. 4-10% and preferably e.g. approx. 5-
  • the ground clinker material i.e. cement powder with possible additives and agents
  • 3-12% mixing ratio 3- 12 kg of fly ash is mixed into the cement powder.
  • the fly ash to be mixed is taken e.g. from additional agent container 5, transported to the proportioning unit 12 by means of conveyor apparatus 10 and weighed and also mixed, by means of proportioning unit 12, into the clinker material, i.e. into the cement powder, that came from the grinding apparatus 7, which cement powder is conducted to the proportioning unit 12 by means of conveyor apparatus 11.
  • the amount of fly ash to be used in the manufacturing of cement can thus, owing to the precise grain size grading, also be a lot smaller than the approx. 15-40% of the amount of the clinker material that is used according to prior art, although more savings in the amount of clinker are achieved with a larger percentage.
  • a larger percentage of graded fly ash added after the grinding of the clinker enables greater compression strength of the concrete after hardening of the concrete has progressed further, i.e. greater final strength of the concrete .
  • the special cement manufactured with the method and apparatus according to the invention is extremely well suited for manufacturing strong concrete, e.g. in conjunction with the manufacturing of cement producing normal concrete strength.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Cette invention concerne un procédé et un appareil de fabrication de ciment. Ledit procédé consiste à ajouter à un matériau de clinker broyé des additifs et/ou des agents tels que des cendres volantes, dont les particules (21) présentent une grosseur de grain inférieure à celle des particules de ciment (22) de la poudre de ciment. En conjonction avec le procédé de fabrication de ciment, de cendres volantes calibrées avec précision par grosseur de grain sont ajoutées à la poudre de ciment broyée à partir d'un matériau de clinker après le broyage, ledit cendres volantes comprenant environ 20 à 80 % de particules de cendres volantes sensiblement rondes.
EP15799132.4A 2014-05-28 2015-05-27 Procédé et appareil de fabrication de ciment Withdrawn EP3148954A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20145489A FI127048B (fi) 2014-05-28 2014-05-28 Menetelmä ja laitteisto sementin valmistamiseksi
PCT/FI2015/050367 WO2015181447A1 (fr) 2014-05-28 2015-05-27 Procédé et appareil de fabrication de ciment

Publications (2)

Publication Number Publication Date
EP3148954A1 true EP3148954A1 (fr) 2017-04-05
EP3148954A4 EP3148954A4 (fr) 2018-03-28

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Family Applications (1)

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EP15799132.4A Withdrawn EP3148954A4 (fr) 2014-05-28 2015-05-27 Procédé et appareil de fabrication de ciment

Country Status (3)

Country Link
EP (1) EP3148954A4 (fr)
FI (1) FI127048B (fr)
WO (1) WO2015181447A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116840007A (zh) * 2023-06-28 2023-10-03 中国建筑材料科学研究总院有限公司 一种分级计量的水泥基材料高通量制备方法及装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2930215B2 (ja) * 1990-04-17 1999-08-03 株式会社四国総合研究所 水密性コンクリート用セメント組成物およびその製造方法
WO1995032162A1 (fr) * 1994-05-20 1995-11-30 New Jersey Institute Of Technology Beton et mortier resistants aux sulfates et aux acides
FI126025B (fi) * 2012-09-12 2016-05-31 Fatec Oy Menetelmä ja laitteisto jätteeksi luokiteltavan aineen käsittelemiseksi, menetelmällä valmistettu tuote ja tuotteen käyttö

Also Published As

Publication number Publication date
EP3148954A4 (fr) 2018-03-28
WO2015181447A1 (fr) 2015-12-03
FI20145489A7 (fi) 2015-11-29
FI127048B (fi) 2017-10-13

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