WO2022207350A1 - Versatz zur herstellung eines feuerfesten, ungebrannten formkörpers, derartige formkörper, verfahren zu dessen herstellung, sowie zustellung eines ofens und ofen - Google Patents
Versatz zur herstellung eines feuerfesten, ungebrannten formkörpers, derartige formkörper, verfahren zu dessen herstellung, sowie zustellung eines ofens und ofen Download PDFInfo
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- WO2022207350A1 WO2022207350A1 PCT/EP2022/057053 EP2022057053W WO2022207350A1 WO 2022207350 A1 WO2022207350 A1 WO 2022207350A1 EP 2022057053 W EP2022057053 W EP 2022057053W WO 2022207350 A1 WO2022207350 A1 WO 2022207350A1
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- WIPO (PCT)
- Prior art keywords
- mass
- furnace
- lining
- shaped body
- batch
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 46
- 235000009566 rice Nutrition 0.000 claims abstract description 46
- 239000011449 brick Substances 0.000 claims abstract description 17
- 239000010903 husk Substances 0.000 claims abstract description 11
- 241000209094 Oryza Species 0.000 claims description 45
- 239000004568 cement Substances 0.000 claims description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 26
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 235000013339 cereals Nutrition 0.000 claims description 20
- 239000011398 Portland cement Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 9
- 229910021487 silica fume Inorganic materials 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000010459 dolomite Substances 0.000 claims description 6
- 229910000514 dolomite Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 238000003826 uniaxial pressing Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 239000001095 magnesium carbonate Substances 0.000 claims description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 5
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 2
- 238000013003 hot bending Methods 0.000 claims description 2
- 230000001698 pyrogenic effect Effects 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 claims description 2
- 238000010248 power generation Methods 0.000 claims 2
- 238000004056 waste incineration Methods 0.000 claims 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 34
- 238000009413 insulation Methods 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000008187 granular material Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000003991 Rietveld refinement Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000006105 batch ingredient Substances 0.000 description 1
- 230000000035 biogenic effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011823 monolithic refractory Substances 0.000 description 1
- 239000002694 phosphate binding agent Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific 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
- 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
- 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
- C04B28/06—Aluminous 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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 present invention relates to a dry, refractory batch based on rice hull ash as a supplement for the production of a heat-insulating, refractory, unfired shaped body, in particular a stone or a plate, and such a shaped body and a method for its production and the use of the batch .
- the invention relates to various uses of the molded body, in particular also a lining with such a molded body and an oven, in particular an industrial oven or a household oven, with such a lining.
- refractory should not be limited to the definition according to ISO 836 or DIN 51060, which define a cone falling point of >1500°C.
- Refractory products within the meaning of the invention have a pressure softening point To.5 according to DIN EN ISO 1893: 2009-09 of To.5 ⁇ 600.degree. C., preferably To.5 ⁇ 800.degree.
- refractory or refractory granular materials or granules within the meaning of the invention are materials or granules that are suitable for a refractory product with the above-mentioned printer softening point To.5.
- the refractory products according to the invention are used to protect unit constructions in units in which temperatures between 600 and 2000° C., in particular between 1000 and 1800° C., prevail.
- grain or “granular material” in the sense of the invention includes a pourable solid that consists of many small, solid grains. If the grains have a grain size of ⁇ 200 ⁇ m, the grain is a flour or powder.
- the granules are produced, for example, by mechanical comminution, for example breaking and/or milling. The grain distribution of the granulation is usually adjusted by sieving.
- DE 10 2016 112 044 A1 discloses the use of an unfired, refractory shaped body having a binder matrix containing at least one set, permanent binder and aggregate grains with and/or made of biogenic silica, preferably with and/or made of rice husk ash, which are bound into the binder matrix are, for the thermal insulation of a metal melt, in particular a steel melt, and/or a metallic cast block solidifying from the metal melt.
- DE 102016 112 044 A1 discloses the use of the shaped body for thermal insulation of a refractory lining, in particular in multi-layer masonry or in a heat treatment furnace, or as a corrosion barrier, for example against alkali attack, or as a fire protection lining or as a filter material for hot gases.
- the at least one permanent binder can be an inorganic binder, preferably water glass or a sol-gel binder or a phosphate binder or alumina cement or Portland cement.
- the shaped body according to DE 102016 112 044 A1 can contain microsilica, expanded perlite and/or expanded vermiculite and/or expanded clay and/or inorganic fibers, preferably mineral and/or slag and/or glass and/or ceramic fibers , and/o the fly ash and/or (power plant) filter dust.
- the cold compressive strength of the molding is preferably 1.5 to 20.0 MPa, preferably 2.5 to 15.0 MPa, according to DIN EN 993-5 (12/1998).
- the object of the present invention is to provide a dry, refractory batch for the production of a heat-insulating, refractory, unfired shaped body, in particular a brick or a panel, which has improved mechanical properties and at the same time good heat-insulating properties and is highly refractory.
- a further object of the invention is the provision of such a shaped body and a method for its production and the specification of various uses of the shaped body.
- FIG. 1 Schematic and greatly simplified, a cross section through a stone according to the invention
- FIG. 2 Schematic and highly simplified a cross section through a plate according to the invention
- FIG. 3 Schematic and highly simplified a cross section through a lining of a furnace according to the invention with bricks according to the invention
- the unfired shaped body 1 according to the invention has a binding matrix 2 in which aggregate grains 3 of rice hull ash are embedded or bound.
- the aggregate grains 3 are distributed in the binding matrix 2 .
- the shaped body 1 is preferably a stone 4, in particular a brick 5, or a slab 6.
- the binding matrix 2 consists of a set or hardened mixture that contains Portland cement and/or alumina cement as well contains, preferably consists of, a finely divided, preferably amorphous, SiC component.
- the shaped body 1 according to the invention is produced from a dry batch, which has a cement component made from Portland cement and/or alumina cement, the finely divided, preferably amorphous, SiC component and, as an additive, rice hull ash.
- the binding matrix 2 is formed from the cement component and the SiC component.
- the cement component and the Si0 2 component can thus be referred to together as the binding component of the offset.
- the batch preferably has 5 to 40% by mass, preferably 5 to 35% by mass or 10 to 35% by mass, particularly preferably 5 to 30% by mass, cement component and/or the 5 to 40% by mass. %, preferably 5 to 35% by mass or 10 to 35% by mass, particularly preferably 5 to 30% by mass, Si0 2 component and/or 25 to 70% by mass, preferably 25 to 60 M. -%, particularly preferably 30 to 55 M.-%, supplement from rice husk ash.
- the batch preferably consists of at least 90% by mass, preferably at least 95% by mass, particularly preferably at least 98% by mass, and very particularly preferably 100% by mass or exclusively of the cement component nente, the Si0 2 component and the rice hull ash.
- the proportion of further or other components in addition to the cement component, the SiO 2 component and the rice hull ash is therefore preferably ⁇ 10% by mass, preferably ⁇ 5% by mass, particularly preferably >2% by mass.
- the batch preferably has 25 to 70% by mass, preferably 25 to 60% by mass, particularly preferably 30 to 55% by mass, aggregate from rice hull ash and the remainder of the batch consists of the binding component, ie the cement component and the Si0 2 component, and optionally the other components.
- the proportion of cement component and SiC component in the batch is preferably at least 5% by mass in each case.
- the other components can in particular be perlite and/or a burn-out material and/or kieselguhr and/or fly ash.
- standardized Portland cement (CEM I) according to DIN EN 197-1:2011-11 consists of 95-100% by mass of Portland cement clinker and 0-5% by mass of secondary components.
- Portland cement (CEM I) contains a sulphate carrier as a setting regulator.
- Portland cement is understood as meaning a mixture of Portland cement clinker, optionally the secondary components and the sulfate carrier.
- the other normal cements according to DIN EN 197-1:2011-11 are Portland cement in combination with the respective additional main component(s) or a mixture of Portland cement and the respective additional main component(s). - share).
- the other main components are therefore other components of the batch according to the invention. If the other main component is silica dust (eg CEM II AD) or another SiO 2 component according to the invention, this is of course counted towards the SiO 2 component.
- Alumina cement (CAC) is standardized in DIN EN 14647:2006-01.
- the alumina cement clinker essentially consists of monocalcium aluminate (CA).
- Alumina cement consists of alumina cement clinker and possibly grinding aids. However, their share is > 0.2 M.-%.
- the cement component preferably consists of at least 90% by mass, preferably exclusively, of Portland cement.
- the Si0 2 component is very finely divided or in powder form.
- the specific surface area according to DIN ISO 9277:2014-01 is 10 to 230 m 2 /g, preferably 10 to 100 m 2 /g, very particularly preferably 15 to 60 m 2 /g.
- the SiO 2 component preferably has a grain size or particle size ⁇ 200 ⁇ m, preferably ⁇ 150 ⁇ m, determined according to ISO 13320:2020-01. In other words, it is present exclusively in a grain size ⁇ 200 ⁇ m, preferably ⁇ 150 ⁇ m.
- the Si0 2 component has a content of S1O2 ⁇ 85% by mass determined according to DIN EN ISO 12677:2013-02.
- Amorphous means that the Si0 2 component contains more amorphous S1O2 than crystalline S1O2, determined by quantitative Riedveld analysis.
- a defined quantity of an internal standard of known composition is added to the sample to be examined.
- the sample prepared in this way is then examined in an X-ray diffractometer.
- the amorphous portion of the sample is then calculated using the Rietveld analysis of the measurement file (diffraction image of the sample) (see eg "Quantitative Rietveld analysis of amorphous materials using the example of blast furnace slag and fly ash", Torsten Westphal, 2007).
- the SiO 2 component preferably has a bulk density of 0.2 to 0.7 g/cm 3 , preferably 0.25 to 0.6 g/cm 3 , determined according to DIN EN ISO 60:2000-01.
- the Si0 2 component can consist of one or more, preferably amorphous, Si0 2 raw materials.
- the Si0 2 raw materials also have the properties specified for the Si0 2 component (Si0 2 content, grain size or specific surface area, density, etc.).
- the SiC component consists of microsilica and/or fumed silicon dioxide and/or precipitated silicon dioxide.
- the SiO 2 component particularly preferably consists of at least 90% by mass, preferably exclusively, of microsilica.
- Microsilica (silica dust or silica fume) is a by-product of the reduction of high-purity quartz with carbon in electric arc furnaces in the manufacture of silicon and ferrosilicon alloys. Microsilica consists of very fine spherical particles.
- Pyrogenic silicon dioxide (fumed silica or fumed silica) is a synthetically produced, colloidal material made of amorphous silicon dioxide grains or silicon dioxide particles, which are aggregated into larger units. It is made by high-temperature pyrolysis.
- Precipitated silica is a white, powdery material produced by precipitation from a siliceous solution.
- the aggregate grains 3 also consist of rice husk ash, which has a significantly lower carbon content than conventional rice husk ash.
- the rice hull ash has a carbon content of ⁇ 3% by mass, preferably ⁇ 1.5% by mass, particularly preferably ⁇ 0.5% by mass, very particularly preferably ⁇ 0.2% by mass, determined according to DIN 51075-2:1984-03, on.
- conventional rice hull ash has a carbon content of 4 to 15% by mass, determined according to DIN DIN 51075-2:1984-03.
- Traditional rice hull ash is black in color due to its high carbon content.
- the low-carbon rice hull ash of the present invention is light in color, such as light gray or even pink.
- the low-carbon rice hull ash according to the invention is produced, for example, by thermal treatment of conventional black, ie high-carbon rice hull ash at temperatures of at least 1300° C., preferably at least 1400° C. In the process, the carbon contained is largely oxidized, so that the rice hull ash first takes on a gray and finally a light, especially pink, color. Or it is fired directly at these temperatures.
- the rice hull ash according to the invention also preferably has the following chemical composition according to DIN EN ISO 12677 (02/2013), the individual components (without ignition losses) adding up to 100% by weight:
- the carbon content is not included in the chemical analysis, since according to DIN EN ISO 12677:2013-02 the analysis is carried out on an annealed or melted substance.
- the rice hull ash preferably has the following particle size distribution in accordance with DIN 66165-2 (04/1987) based on the dry matter, with the individual components adding up to 100% by weight:
- the rice hull ash preferably has a dgo value of 350 to 650 miti, preferably 400 to 600 miti, and/or a dso value of 100 to 400 miti, preferably 150 to 350 miti, according to DIN 66165-2 (04/1987) on.
- the rice hull ash according to the invention is therefore somewhat finer than conventional rice hull ash and as a result also improves the cold compressive strength.
- the bulk density according to DIN EN 1097-3 (06/1998) of the rice hull ash is preferably 200 to 600 kg/m 3 , preferably 300 to 500 kg/m 3 , particularly preferably 350 to 450 kg/m 3 .
- the rice hull ash of the present invention has a slightly different structure than the high-carbon rice hull ash. While high-carbon rice hull ash has a relatively coarse, porous, and long-acicular structure, the low-carbon rice hull ash of the present invention is more fine-grained, somewhat denser, and less acicular.
- the dry batch ingredients are mixed together.
- the amount of mixing water is preferably 10 to 40% by mass, preferably 15 to 30% by mass, based on the mass of the dry components of the mixture or the mass of the dry batch.
- the relatively high mixing water content can also contribute to improving the cold compressive strength.
- SiC component in the form of an aqueous dispersion and to mix this with the other dry components.
- addition in dry form is preferred.
- the finished aqueous mixture comprising the cement component, the S1O2 component, the rice hull ash and the water, is then placed in a mold and compacted in it.
- the densification is preferably carried out by means of uniaxial pressing. But it can also be done by means of load vibration.
- the mold In tamper head vibration, the mold is placed on a vibrating table. A weight is placed on the finished mixture in the mould, the vibrating table is activated and the mixture is compacted by means of vibration. Smaller formats are usually produced by means of vibrating loads.
- uniaxial pressing the mold filled with the finished mixture is placed in a press, with a cover plate being placed on the mixture. The upper ram of the press is then moved against the cover plate and the mixture is thus compacted with a specific pressure. Several pressing strokes are preferably carried out. Larger formats are usually produced using uniaxial pressing.
- the compression ratio (compression stroke) of the molding compound is preferably between 2.5 and 3.5.
- the green-solid shaped body is removed from the mold and left to set. Since the shaped body 1 according to the invention is unfired, the setting takes place in a manner known per se below the temperature for ceramic firing. Preferably, the moldings are allowed to set at room temperature for a period of 20 to 48 hours. The set moldings are then preferably dried, in particular to constant weight. As already explained, the shaped body 1 according to the invention has excellent cold compressive strength combined with high fire resistance and excellent thermal insulation properties.
- the cold compressive strength of the shaped body 1 is 18 to 40 MPa, preferably >20 to 35 MPa, particularly preferably 22 to
- the shaped body 1 preferably has a softening temperature of 1000 to 1700° C., preferably 1250 to 1650° C., as determined using a heating microscope in accordance with DIN EN 51730 (09/2007).
- the shaped body 1 is therefore suitable for long-term or permanent use at very high temperatures.
- the high softening temperature results, among other things, from the use of the finely divided SiC component, which means that the cement component content could be reduced.
- the shaped body 1 preferably has a porosity of 30 to 90%, preferably 40 to 60% according to DIN EN 1094-4 (09/1995).
- the high porosity results in particular from the high proportion of rice hull ash and its high microporosity. Because of this, surprisingly, the very fine particles of the SiO 2 component do not penetrate into the aggregate grains 3 of rice hull ash, so that their porosity is retained. In particular, due to the high porosity, the shaped body 1 has a very low thermal conductivity.
- the shaped body 1 preferably has the following thermal conductivities in accordance with DIN EN 993-15 (07/2005):
- the shaped body 1 according to the invention also preferably has a dry bulk density po of 0.3 to 1.5 g/cm 3 , preferably 0.5 to 1.4 g/cm 3 , according to DIN EN 1094-4 (09/1995). .
- the cold bending strength of the shaped body 1 is preferably 1.0 to 9.0 MPa, preferably 1.5 to 7.0 MPa, according to DIN EN 993-6 (04/1995).
- the hot bending strength at 1000° C. of the shaped body 1 is preferably 1.0 to 7.0 MPa, preferably 1.5 to 5.0 MPa, according to DIN EN 993-7 (04/1995).
- the SiO 2 content according to DIN EN ISO 12677 (02/2013) of the molding 1 according to the invention is preferably in the range from 65 to 90% by mass. Due to its high cold bending strength, the shaped body 1 according to the invention is excellently suited to be used in furnaces, in particular in large-volume industrial furnaces, in which the shaped body 1 is exposed to high dynamic loads.
- the industrial furnace which is particularly large in volume, is preferably a kiln or a smelting furnace or a furnace for generating energy or a heat treatment furnace, e.g. an annealing furnace.
- These furnaces are preferably furnaces for the non-metal industry or the metal industry, in particular the steel industry or the non-ferrous metal industry.
- a waste incinerator a glass melting furnace, a furnace from the ceramics industry, a furnace from the paper industry, a shaft or rotary kiln, preferably a cement shaft or cement rotary kiln, a lime shaft or lime rotary kiln, a magnesia shaft or a Magnesite rotary kiln or a dolomite shaft or dolomite rotary kiln.
- a furnace generally has an outer furnace shell 8 which surrounds a furnace interior 11 .
- the furnace has a refractory lining 9 lining the furnace shell on the inside.
- the delivery 9 is used for, in particular thermal, insulation of the furnace shell 8 from the furnace interior 11.
- the multi-layer masonry 7 lines the inside of the furnace shell 8 and forms the refractory lining 9 of the industrial furnace.
- the multi-layer masonry 7 also has a fire-side or hot-side working lining or a lining 10 on the inside of the unit, which is in direct contact with a furnace interior 11 or closes it off. Between the furnace shell 8 and the working lining 10 there is an insulating layer or an isolating backing or an insulating lining 12 . This is used for thermal insulation of the furnace shell 8 from the working lining 10. Furthermore, an intermediate layer lining (not shown) can be present between the working lining 10 and the insulating lining 12.
- the working liner 10 can be constructed in a conventional manner from refractory bricks or it can be a monolithic refractory lining.
- at least the insulating lining 12 now has bricks 5 according to the invention (FIG. 3) and/or panels 6 (not shown) or consists of these.
- the intermediate layer lining can also have bricks 5 according to the invention (FIG. 3) and/or slabs 6 (not shown) or consist of these.
- the lining 9 can also be a single-shell or single-layer lining 9, in particular a single-layer masonry or a single-layer masonry (not shown).
- the single-shell delivery 9 thus serves as a working lining and for thermal insulation of the furnace jacket 8 from the furnace interior 11.
- the single-shell position 9 now has bricks 5 and/or slabs 6 according to the invention or consists of these.
- the delivery can also be a delivery of an aggregate or metallurgical vessel of the metal industry, in particular the steel industry or the non-ferrous metal industry, for receiving and/or transporting and/or treating liquid metal, in particular steel.
- These units are therefore transport vessels and/or treatment vessels and/or distribution vessels, preferably converters, ladles or distribution channels.
- the molded bricks 1 according to the invention preferably the bricks 5 and/or the slabs 6, can also be used particularly advantageously in an analogous manner for lining a domestic stove, preferably a fireplace stove.
- the shaped body 1 according to the invention has excellent cold bending strength combined with high fire resistance and excellent thermal insulation properties.
- the moldings 1 according to the invention also surprisingly have a high acid resistance.
- a plate according to the invention was produced from a batch with the following composition by means of uniaxial pressing:
- the finished mixture was compacted by a factor of 3.
- the plate had the following dimensions: 800 x 800 x 64 mm 3 .
- the panel produced had the following properties:
- the finished mixture was compacted by a factor of 3.
- the plate had the following dimensions: 800 x 800 x 64 mm 3 .
- the panel produced had the following properties:
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22716375.5A EP4313905A1 (de) | 2021-04-01 | 2022-03-17 | Versatz zur herstellung eines feuerfesten, ungebrannten formkörpers, derartige formkörper, verfahren zu dessen herstellung, sowie zustellung eines ofens und ofen |
BR112023019831A BR112023019831A2 (pt) | 2021-04-01 | 2022-03-17 | Composição para produção de corpo moldado não queimado refratário, corpo moldado deste tipo, método de produção de corpo moldado, revestimento de forno e forno |
CN202280025735.2A CN117222605A (zh) | 2021-04-01 | 2022-03-17 | 用于制造耐火的未烧制的成形体的配合料、这种成形体、其制造方法以及炉的衬里和炉 |
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DE102021203371.7 | 2021-04-01 | ||
DE102021203371.7A DE102021203371A1 (de) | 2021-04-01 | 2021-04-01 | Versatz zur Herstellung eines feuerfesten, ungebrannten Formkörpers, derartiger Formkörper, Verfahren zu dessen Herstellung, sowie Zustellung eines Ofens und Ofen |
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WO2022207350A1 true WO2022207350A1 (de) | 2022-10-06 |
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PCT/EP2022/057053 WO2022207350A1 (de) | 2021-04-01 | 2022-03-17 | Versatz zur herstellung eines feuerfesten, ungebrannten formkörpers, derartige formkörper, verfahren zu dessen herstellung, sowie zustellung eines ofens und ofen |
Country Status (5)
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EP (1) | EP4313905A1 (de) |
CN (1) | CN117222605A (de) |
BR (1) | BR112023019831A2 (de) |
DE (1) | DE102021203371A1 (de) |
WO (1) | WO2022207350A1 (de) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2425532A (en) * | 2005-04-27 | 2006-11-01 | Univ Sheffield | Concrete compositions containing glass powder with a particle size between 1mm and less than 35 microns |
FR3001727A1 (fr) * | 2013-02-06 | 2014-08-08 | Lafarge Sa | Liant hydraulique |
DE102013218689A1 (de) * | 2013-09-18 | 2015-03-19 | Wacker Chemie Ag | Kieselsäure-Mischungen und ihre Verwendung als Wärmedämmmaterial |
WO2016170092A1 (en) * | 2015-04-23 | 2016-10-27 | Lafarge | Low density cementitious compositions for use at low and high temperatures |
US20170369375A1 (en) * | 2016-06-28 | 2017-12-28 | King Fahd University Of Petroleum And Minerals | Cementitious blend and concrete mix compositions resistant to high temperatures and alkaline conditions |
DE102016112044A1 (de) | 2016-06-30 | 2018-01-04 | Refratechnik Holding Gmbh | Verwendung eines wärmedämmenden Formkörpers zur Isolation von Metallschmelzen gegenüber der Atmosphäre oder einem metallurgischen Gefäß |
CN108218353A (zh) * | 2018-03-23 | 2018-06-29 | 代彦霞 | 一种高强度抗裂混凝土 |
CN108794061A (zh) * | 2018-08-20 | 2018-11-13 | 北京新时代寰宇科技发展有限公司 | 一种含复合掺合料的泡沫混凝土及其制备方法和应用 |
CN108975821A (zh) * | 2018-08-28 | 2018-12-11 | 江西省袋鼠教育科技有限公司 | 一种绿色环保型瓷砖粘接剂及其制备方法 |
CN107512890B (zh) * | 2017-08-16 | 2019-11-05 | 西安建筑科技大学 | 一种c190强度等级的超高强高性能纤维混凝土及其制备方法 |
CN107382216B (zh) * | 2017-08-30 | 2020-06-19 | 河北建筑工程学院 | 掺加铁尾矿与建筑垃圾的高强混凝土及其制备方法 |
CN112028576A (zh) * | 2020-09-14 | 2020-12-04 | 江西龙正科技发展有限公司 | 适用于uhpc路桥快速修复材料 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2298710A1 (de) | 2009-09-21 | 2011-03-23 | Sika Technology AG | Zusatzmittel für mineralische Bindemittel |
DE102011079692A1 (de) | 2011-07-22 | 2013-01-24 | Chemex Gmbh | Speiser und formbare Zusammensetzungen zu deren Herstellung |
-
2021
- 2021-04-01 DE DE102021203371.7A patent/DE102021203371A1/de active Pending
-
2022
- 2022-03-17 WO PCT/EP2022/057053 patent/WO2022207350A1/de active Application Filing
- 2022-03-17 BR BR112023019831A patent/BR112023019831A2/pt unknown
- 2022-03-17 EP EP22716375.5A patent/EP4313905A1/de active Pending
- 2022-03-17 CN CN202280025735.2A patent/CN117222605A/zh active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2425532A (en) * | 2005-04-27 | 2006-11-01 | Univ Sheffield | Concrete compositions containing glass powder with a particle size between 1mm and less than 35 microns |
FR3001727A1 (fr) * | 2013-02-06 | 2014-08-08 | Lafarge Sa | Liant hydraulique |
DE102013218689A1 (de) * | 2013-09-18 | 2015-03-19 | Wacker Chemie Ag | Kieselsäure-Mischungen und ihre Verwendung als Wärmedämmmaterial |
WO2016170092A1 (en) * | 2015-04-23 | 2016-10-27 | Lafarge | Low density cementitious compositions for use at low and high temperatures |
US20170369375A1 (en) * | 2016-06-28 | 2017-12-28 | King Fahd University Of Petroleum And Minerals | Cementitious blend and concrete mix compositions resistant to high temperatures and alkaline conditions |
DE102016112044A1 (de) | 2016-06-30 | 2018-01-04 | Refratechnik Holding Gmbh | Verwendung eines wärmedämmenden Formkörpers zur Isolation von Metallschmelzen gegenüber der Atmosphäre oder einem metallurgischen Gefäß |
CN107512890B (zh) * | 2017-08-16 | 2019-11-05 | 西安建筑科技大学 | 一种c190强度等级的超高强高性能纤维混凝土及其制备方法 |
CN107382216B (zh) * | 2017-08-30 | 2020-06-19 | 河北建筑工程学院 | 掺加铁尾矿与建筑垃圾的高强混凝土及其制备方法 |
CN108218353A (zh) * | 2018-03-23 | 2018-06-29 | 代彦霞 | 一种高强度抗裂混凝土 |
CN108794061A (zh) * | 2018-08-20 | 2018-11-13 | 北京新时代寰宇科技发展有限公司 | 一种含复合掺合料的泡沫混凝土及其制备方法和应用 |
CN108975821A (zh) * | 2018-08-28 | 2018-12-11 | 江西省袋鼠教育科技有限公司 | 一种绿色环保型瓷砖粘接剂及其制备方法 |
CN112028576A (zh) * | 2020-09-14 | 2020-12-04 | 江西龙正科技发展有限公司 | 适用于uhpc路桥快速修复材料 |
Non-Patent Citations (2)
Title |
---|
CHATVEERA B ET AL: "Durability of conventional concretes containing black rice husk ash", JOURNAL OF ENVIRONMENTAL MANAGEMENT, ELSEVIER, AMSTERDAM, NL, vol. 92, no. 1, 1 January 2011 (2011-01-01), pages 59 - 66, XP027473044, ISSN: 0301-4797, [retrieved on 20100921], DOI: 10.1016/J.JENVMAN.2010.08.007 * |
LE HA THANH ET AL: "The mix design for self-compacting high performance concrete containing various mineral admixtures", MATERIALS AND DESIGN, vol. 72, 20 February 2015 (2015-02-20), pages 51 - 62, XP029202042, ISSN: 0261-3069, DOI: 10.1016/J.MATDES.2015.01.006 * |
Also Published As
Publication number | Publication date |
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DE102021203371A1 (de) | 2022-10-06 |
EP4313905A1 (de) | 2024-02-07 |
BR112023019831A2 (pt) | 2023-11-07 |
CN117222605A (zh) | 2023-12-12 |
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