WO2019053167A1 - Verfahren zur herstellung einer porösen sintermagnesia, versatz zur herstellung eines grobkeramischen feuerfesten erzeugnisses mit einer körnung aus der sintermagnesia, derartiges erzeugnis sowie verfahren zu seiner herstellung, zustellung eines industrieofens und industrieofen - Google Patents
Verfahren zur herstellung einer porösen sintermagnesia, versatz zur herstellung eines grobkeramischen feuerfesten erzeugnisses mit einer körnung aus der sintermagnesia, derartiges erzeugnis sowie verfahren zu seiner herstellung, zustellung eines industrieofens und industrieofen Download PDFInfo
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- WO2019053167A1 WO2019053167A1 PCT/EP2018/074817 EP2018074817W WO2019053167A1 WO 2019053167 A1 WO2019053167 A1 WO 2019053167A1 EP 2018074817 W EP2018074817 W EP 2018074817W WO 2019053167 A1 WO2019053167 A1 WO 2019053167A1
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- grain
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- magnesia
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 300
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 150
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005469 granulation Methods 0.000 title claims abstract description 12
- 230000003179 granulation Effects 0.000 title claims abstract description 12
- 239000004927 clay Substances 0.000 title claims abstract description 5
- 239000008188 pellet Substances 0.000 claims abstract description 11
- 238000005245 sintering Methods 0.000 claims abstract description 11
- 235000012245 magnesium oxide Nutrition 0.000 claims description 143
- 235000013339 cereals Nutrition 0.000 claims description 92
- 235000013312 flour Nutrition 0.000 claims description 37
- 239000004575 stone Substances 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 33
- 239000011230 binding agent Substances 0.000 claims description 29
- 239000011148 porous material Substances 0.000 claims description 28
- 229910052596 spinel Inorganic materials 0.000 claims description 27
- 239000011029 spinel Substances 0.000 claims description 27
- 238000009826 distribution Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000011819 refractory material Substances 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000010304 firing Methods 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- 239000008187 granular material Substances 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 230000001364 causal effect Effects 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 8
- 239000001095 magnesium carbonate Substances 0.000 claims description 8
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 8
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010459 dolomite Substances 0.000 claims description 5
- 229910000514 dolomite Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910001691 hercynite Inorganic materials 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 238000009628 steelmaking Methods 0.000 claims description 5
- -1 Magnesium aluminate Chemical class 0.000 claims description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 4
- 229910052839 forsterite Inorganic materials 0.000 claims description 4
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000004876 x-ray fluorescence Methods 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 229910001570 bauxite Inorganic materials 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 239000008121 dextrose Substances 0.000 claims description 2
- 238000001033 granulometry Methods 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 235000013379 molasses Nutrition 0.000 claims description 2
- 229910052609 olivine Inorganic materials 0.000 claims description 2
- 239000010450 olivine Substances 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000002694 phosphate binding agent Substances 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 238000010248 power generation Methods 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 238000005496 tempering Methods 0.000 claims 1
- 239000011449 brick Substances 0.000 abstract description 6
- 239000003518 caustics Substances 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 67
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 5
- 238000001764 infiltration Methods 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011451 fired brick Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000013521 mastic Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 235000017060 Arachis glabrata Nutrition 0.000 description 1
- 235000010777 Arachis hypogaea Nutrition 0.000 description 1
- 244000105624 Arachis hypogaea Species 0.000 description 1
- 235000018262 Arachis monticola Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 244000300264 Spinacia oleracea Species 0.000 description 1
- 235000009337 Spinacia oleracea Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011822 basic refractory Substances 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 210000000349 chromosome Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002706 dry binder Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
- C04B35/0435—Refractories from grain sized mixtures containing refractory metal compounds other than chromium oxide or chrome ore
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/6262—Milling of calcined, sintered clinker or ceramics
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/6264—Mixing media, e.g. organic solvents
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62695—Granulation or pelletising
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/64—Burning or sintering processes
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0051—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity
- C04B38/0058—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity open porosity
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- 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
- F27D1/0009—Comprising ceramic fibre elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
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Definitions
- the invention relates to a process for the production of a porous sintered magnesia and to an offset for the production of a porous sintered magnesia, offset for the production of a coarse ceramic refractory product with a grain of sintered magnesia, such a product and method for its production coarse ceramic, refractory, molded or unshaped product containing the porous sintered magnesia.
- the invention also relates to such a product made from the offset and a method for its production.
- the invention relates to a delivery, in particular a working lining and / or a back wall, a large-volume industrial furnace, wherein the delivery, in particular the working lining and / or the Schumautation having at least one such product, as well as such an industrial furnace.
- Refractory should not be limited in the context of the invention to the definition according to ISO 836 or DIN 51060, which define a cone drop point of> 1500 ° C.
- Refractory products according to the invention have a printer softening point T 0 , s according to DIN EN ISO 1893: 2009-09 of T 0 , s ⁇ 600 ° C, preferably To, 5 ⁇ 800 ° C.
- refractory or refractory granular materials or granulations in the sense of the invention are those materials or granules which are suitable for a refractory
- the refractory products according to the invention are used to protect aggregate constructions in aggregates in which temperatures between 600 and 2000 ° C., in particular between 1000 and 1800 ° C., prevail "or" granular material "according to the invention, a pourable solid, which consists of many small, solid grains. If the grains have a grain size ⁇ 200 ⁇ , it is in the Grain around a flour or powder.
- the grains are produced by mechanical comminution, eg breaking and / or grinding. Grain size distribution is usually adjusted by sieving.
- refractory materials are known to those skilled in the art as being based on six refractory base oxides, as well as carbon and refractory carbon compounds, e.g. in "Gerald Routschka / Hartmut Wuthnow, practical guide” refractory materials ", 5th edition, Vulkan-Verlag, (hereinafter referred to only with” practical guide "), pp.
- non-basic and basic refractory products based on the chemical reaction behavior
- the non-basic product group comprises the materials of the SiO2-Al2O3 series and other materials which are not grouped according to their chemical reaction behavior, such as SiC and carbon Highly SiO2-containing materials are referred to as "acidic.”
- An essential feature of most basic products is that the sum of the oxides MgO and CaO outweighs, and chromite, picrochromite, spinel, and forsterite rocks are also considered basic products although they are nearly neutral, the shaped basic products include in particular magnesia-containing E in particular, magnesia products, magnesia chromosome products, magnesia spinach products, magnesia zirconia products, magnesia peanut products, magnesia talox products, magnesia hercynite products, magnesia adolomics (see, e.g. Practical Guide,
- Typical Magnesiarohstoffe for the production of magnesia products are granules or granules of sintered and / or fused magnesia.
- Sintered magnesia is produced by firing at a temperature of> 1 700 ° C, preferably> 1800 ° C, in order to achieve the highest possible grain density.
- Melt magnesia is produced at a temperature> 2800 ° C in order to also achieve the highest possible grain density and the lowest possible grain porosity.
- Conventional sintered magnesia varieties have a grain density of> 3.10 g / cm 3 .
- the target values are> 3.30 - 3.40 g / cm 3 .
- the corresponding grain porosities (total porosity) are usually 4-10% by volume.
- Granulations of fused magnesia generally have a grain density of> 3.50 g / cm 3 , with a grain porosity (total porosity) ⁇ 2.5% by volume.
- Shaped products according to the invention are ceramic fired or unfired, in particular pressed, preferably produced in a ceramic factory, products, in particular stones or plates.
- the molded products, in particular the bricks are bricked up, preferably with mortar, walled or mortar-free ("crunchy"), to form the furnace lining or furnace back-wall.
- Unformed products are usually placed behind formwork in larger fields at the place of use and, after hardening, form the furnace lining or furnace back wall They are preferably used as working feed in non-ferrous kilns, preferably in cement kilns, in other fired industrial aggregates, eg in a large-volume industrial furnace to form a refractory lining on the inside of the casing plants, lime pit or lime kilns, or furnaces or furnaces for energy production or used in furnaces of steelmaking or the non-ferrous metal industry.
- the products according to the invention can also be used as insulating backings in one of the ovens mentioned. Generic refractory products should therefore have a low thermal conductivity and a high infiltration resistance.
- the molded products should ensure a good temperature resistance at application temperatures, chemical resistance, thermal shock resistance, good structural elasticity, adapted pressure switch and low gas permeability and high hot bending strength.
- the molded products should have a cold compressive strength adapted to the intended use, which should in particular also be sufficiently high for their handling during and after their production and also after temperature changes.
- Generic refractory products are known from DE 10 2006 040 269 A1 and DE 10 2013 020 732 A1. In these, a desired porosity is set via the particle size distribution:
- refractory products made of different refractory materials are known, which may possibly be used as working fats and possibly also have a relatively low thermal conductivity owing to an open porosity> 10% by volume.
- fine-grained products which are made from a Versetz, the 50-90 wt .-% finely divided refractory material having a particle size d9o ⁇ 100 ⁇ , wherein the proportion of grain size d9o between 100-500 ⁇ to ⁇ 10 wt ..-% is limited.
- the open porosity of the products consists of more than half of pores with a diameter d9o ⁇ 15 ⁇ and more than 1/10 of pores with a diameter d9o> 100 ⁇ . In this case, the pore content between 15 and 100 ⁇ maximum 1/7 of the open total porosity.
- DE 10 2013 020 732 A1 discloses a coarse ceramic, refractory product of at least one granular refractory material which has an open porosity of between 22 and 45% by volume, in particular between 23 and 29 Vol .-%, and has a grain structure in which the middle grain fraction with grain sizes between 0, 1 and 0.5 mm 10 to 55 wt .-%, in particular 35 to 50 wt .-%, wherein the remainder of the grain structure flour meal content with Grain sizes up to 0, 1 mm and / or coarse grain fraction with grain sizes over 0.5 mm.
- the refractory product is used in particular for producing a working chuck of a large-volume industrial furnace.
- US Pat. No. 4,927,611 describes a magnesia clinker having a porosity of> 40% by volume, preferably in the range from 50 to 70% by volume, and a grain bulk density of ⁇ 2.0 g / cm 3 . In addition, more than 90% by volume of the pores have a pore size ⁇ 50 ⁇ m.
- the Magnesiaklinkers is prepared by granulation of a magnesium oxide-forming component with a particle size of ⁇ 150 ⁇ (100 mesh) and a burnable substance in an additional amount of 10-40 wt .-% and the addition of 1 -15% of a magnesium salt and subsequent firing at 1300 to 1600 ° C.
- the magnesia clinker produced in this way is used in sprayable suspensions for coating nozzles and distributor channels.
- magnesia spinel-based lightweight basic grits are also described by Wen Yan et al. 128, UNITECR 2015, and by Wen Yan et al., in "Effect of Spinel Content of the Lightweight Aggregates on the Reaction Characteristics of Periclase-spinel Reactories with Cement Clinker", Effect of Spinel Content on the Reaction of Porous Periclase Spinet Ceramics and Cement Clinker "from Key Engineering Materials, Vol. 697, pp 581-585.
- Grains are then produced from MgO and from MgO-spinel mixtures, ie MgO or MgO spinel Co clinker, with a porosity of 24.8-30.0% by volume, and then with magnesia mixed as a matrix, shaped and fired at a temperature of 1550 ° C. These molded products are characterized by a porosity of about 30 vol .-%.
- MgO grains have a maximum in their pore size distribution at a pore diameter of 50 [im to; the average pore diameter of the MgO spinel Co-clinker grains is reported to be between 1 1, 33 [im and 27.58 ⁇ stated, the average pore diameter of the matrix is 50.52 ⁇ .
- CN 106747594 A discloses the production of granules from a mixture of 5-95% by weight of MgO causal flour and 5-95% by weight of magnesite flour. These mixtures are mixed with ligus sulfonate and pressed into compacts. The pellets are dried for 20 to 50 hours and then fired at 1450-1700 ° C in the tunnel kiln or shuttle kiln for 10-20 hours. Grains prepared by way of example with 95% by weight of MgO causal flour and 5% by weight of magnesite flour have a porosity of 16.5% by volume and a density of 2.97 g / cm 3 .
- the object of the invention is to provide a sintered magnesia with good grain strength for an offset for producing refractory products with high porosity and low thermal conductivity, which have suitable properties for use in large-volume industrial furnaces and in particular a low infiltration tendency against alkali infiltration.
- Another object of the invention is to provide such an offset as well as a molded or unshaped refractory product made from the offset, and a method for its production.
- the object of the invention is to provide a refractory lining of a large-volume industrial furnace, in particular a kiln of non-metal industry, preferably a cement kiln plant, a Kalkschacht- or Kalkfitrohrofen, a furnace for the production of magnesia or Doloma o- of a heating furnace or a furnace for energy production , or else a furnace of the non-ferrous or steel industry, with at least one or formed from at least one product according to the invention.
- a kiln of non-metal industry preferably a cement kiln plant, a Kalkschacht- or Kalkfitrohrofen
- a furnace for the production of magnesia or Doloma o- of a heating furnace or a furnace for energy production or else a furnace of the non-ferrous or steel industry, with at least one or formed from at least one product according to the invention.
- FIG. 1 shows by way of example a pore diameter distribution of a grain of porous sintered magnesia according to the invention
- FIG. 2 shows by way of example a pore diameter distribution of a molded block according to the invention
- FIG. 3 a photomicrograph (incident light) of a sintered stomach according to the invention, sintered in an HT oven at 1530 ° C., burning time 6 h
- MgO flour preferably of MgO cereal flour
- a reduced maximum firing temperature instead of the usual temperatures of> 1700 ° C.
- a sintered magnesia can be produced, which has a grain porosity (total porosity) according to DIN EN 993-1: 195-04 and DIN EN 993-18: 1999-01 of 15 to 38 vol .-%, preferably from 20 to 38 % By volume.
- the MgO flour may e.g. also consist of deadburned magnesia (DBM) or enamel magnesia. Preferably, however, it is MgO-causal flour.
- DBM deadburned magnesia
- enamel magnesia Preferably, however, it is MgO-causal flour.
- the burning time and the sintering temperatures, ie the temperature profile or the temperature regime or the temperature profile, the sintering or the sintering process are thus set according to the invention so that the grain of porous sintered magnesia according to the invention a grain porosity (total porosity) according to DIN 993-18: 2002 -1 1 and DIN 993-1: 1995-4 from 15 to 38 vol. %, preferably 20 to 38% by volume, and preferably has a grain density according to DIN 993-18: 2002-1 1 of 2.20 to 2.85 g / cm 3 , preferably 2.20 to 2.75 g / cm 3 .
- the temperature regime depends, for example, on the magnesia variety (its reactivity) and the particle size of the MgO flour.
- the sintering takes place at a maximum temperature ⁇ 1600 ° C, preferably ⁇ 1550 ° C, preferably ⁇ 1500 ° C, more preferably ⁇ 1400 ° C.
- sintering takes place at a maximum temperature between 1100-1600 ° C, preferably between 1200-1600 ° C, preferably between 1200-1550 ° C, more preferably between 1200-1500 ° C.
- the firing time at the maximum temperature for producing the sintered magnesia according to the invention is preferably 0.5 h to 7 h, preferably 2 h to 6 h.
- the entire burning time preferably corresponds to that of the customary production of sintered magnesia.
- the firing is preferably carried out in an oxidizing atmosphere, but can also take place in a reducing atmosphere. After firing, the sintered magnesia is mechanically comminuted, in particular broken, and classified by sieving.
- the flour-shaped MgO causter used or the MgO causal flour is preferably prepared in the usual way from magnesium hydroxide or from magnesium carbonate.
- the MgO flour used preferably the MgO causal flour, preferably has a particle size distribution with the following values: dgo between 80 and 100 ⁇ and / or dso between 5 and 15 ⁇ and / or dio between 1 and 3 ⁇ .
- the d x value is known to mean that x% by weight the particles are smaller than the specified value. It is determined by means of laser granulometry according to DIN ISO 13320: 2009.
- the MgO flour is dispersed by means of ultrasound in ethanol.
- the MgO flour used preferably the MgO-mastic used, preferably at least 88 wt .-%, preferably at least 95 wt .-% MgO, more preferably at least 97 wt .-% MgO, determined by X-ray fluorescence analysis (RFA) according to DIN 12677: 2013-02.
- the MgO flour used preferably the MgO-mastic used, preferably contains not more than 4% by weight, preferably not more than 2% by weight of CaO, determined by X-ray fluorescence analysis (RFA) according to DIN 12677: 2013-02.
- the MgO flour preferably the MgO causal flour
- a conventional press preferably a pelleting press or briquetting press or a hydraulic press, in such a way that the compacts have a raw density in accordance with DIN 66133: 1993-06 from 1, 8 to 2 , 3 g / cm 3 , preferably 1, 9 to 2.2 g / cm 3 , and / or a porosity according to DIN 66133: 1993-06 of 32 to 52% by volume, preferably 35 to 45% by volume, respectively.
- the compacts are preferably pellets. But it may also be advantageously briquettes or stones.
- only the MgO flour, preferably the MgO causal flour if appropriate with the addition of a little water, is compressed, ie without binders and thus without any combustibles.
- the compacts thus consist, based on their dry matter, preferably at least 96 wt .-%, preferably at least 98 wt .-%, particularly preferably 100 wt .-%, of MgO flour, preferably from MgO-Kaustermehl.
- the pellets in particular contain no magnesite flour.
- the burning time and the sintering temperatures are, as already explained, adjusted so that the grain of the invention of porous sintered magnesia a grain porosity (total porosity) according to DIN 993-18: 2002-1 1 and DIN 993-1: 1995-4 of 15 to 38% by volume, preferably 20 to 38% by volume, and preferably a grain density according to DIN 993- 18: 2002-1 1 from 2.20 to 2.85 g / cm 3 , preferably 2.20 to 2.75 g / cm 3 . This also applies to the other properties of the grain.
- the grain of porous sintered magnesia according to the invention preferably has a small mean pore diameter d 50 of from 0.1 to 10 ⁇ m, preferably from 2 to 8 ⁇ m, determined in accordance with DIN 66133: 1993-06.
- the pore diameter distribution can be monomodal (see FIG. 1).
- the structure of the sintered magnesia according to the invention is shown in FIG. 3. It has a homogeneous distribution of magnesia particles 1 and small pores 2. Larger pores are not recognizable. The lighter pores 2 are filled with epoxy resin pores, the slightly darker pores 2 are unfilled.
- the grain size of porous sintered magnesia according to the invention also preferably has a grain compressive strength in accordance with DIN 13055: 2016-1 1 (10 mm instead of 20 mm) of 10 to 30 MPa, preferably from 1 to 25 MPa.
- the grain size of porous sintered magnesia according to the invention preferably also has the following thermal conductivities (WLF) according to DIN EN 821-2: 1997-08: TABLE 1 Preferred thermal conductivities of the sintered magnesia according to the invention
- the granulation according to the invention is characterized in particular by the following properties: Table 2: Properties of inventive, porous and dense sintered magnesia
- the sintered magnesia according to the invention is used in offsets according to the invention for the production of shaped, shaped or unshaped refractory products according to the invention.
- An inventive offset comprises a dry matter mixture containing the sintered magnesia according to the invention and binder. That is, the amount of binder (dry or liquid) is added additively and refers to the total dry matter of the dry matter mixture. If appropriate, it is also possible for a liquid additive to be present, which is likewise added in an additive manner and relates to the total dry matter of the dry substance mixture.
- the offset is at least 90 wt .-%, preferably at least 99 wt .-%, more preferably 100 wt .-%, of binder and the dry material mixture, based on the total mass of the offset.
- the dry substance mixture preferably has the following constituents, based in each case on the total dry matter of the dry substance mixture (the Quantities indicate in each case the total sum of the respective components, ie, for example, the total amount of coarse grains of sintered magnesia according to the invention, the total amount of flour grain or on further grain size): a) at least one coarse grain of the sintered magnesia according to the invention with a particle size> 200 ⁇ , preferably in an amount of 10 to 90 wt .-%, preferably from 20 to 80 wt .-% b) at least one flour grain of magnesia, for example from the sintered magnesia invention, with a particle size ⁇ 200 ⁇ , preferably in an amount of 90 to 10 wt %, preferably from 80 to 20 wt .-% c) optionally at least one further granulation of a refractory material, preferably in a total amount of further grain size from 0.5 to 40 wt .-%, preferably from
- -% d) optionally at least one additive for refractory materials, preferably in a total amount ⁇ 5 wt .-% e) optionally at least one additive for refractory Wer hydrocarbons, preferably in a total amount of ⁇ 5% by weight.
- the components may be included in the dry mix in any combination.
- the offset according to the invention also contains, as already explained, in addition to the dry substance mixture at least one liquid or solid binder for refractory materials, preferably in a total amount of 1 to 9 wt .-%, preferably from 2.5 to 6 wt .-%, based on the dry total mass of the dry substance mixture.
- the liquid binder is preferably included in a container separate from the dry components of the batch.
- the coarse grain size of the sintered magnesia according to the invention preferably has a grain size of at most 8 mm, preferably up to a maximum of 6 mm, particularly preferably up to a maximum of 4 mm.
- the grain distribution of the coarse grains from the sintered magnesia according to the invention and / or the dry substance mixture according to the invention is preferably continuous, preferably according to a Litzow, Furnas or Fuller curve, or it has a Gaussian distribution.
- the further granulation preferably consists of an elasticizing raw material, that is to say a raw material which typically serves to lower the elasticity modulus.
- the further granulation preferably consists of a raw material from the following group:
- the invention is particularly effective with a dry matter mixture of the following materials:
- Magnesia with zirconia As explained, combinations of different further grains are also possible, preferably a combination of a further grain of hercynite with a further grain of magnesium aluminate spinel.
- the further grain size preferably has a maximum grain size of ⁇ 8 mm, preferably of ⁇ 6 mm, particularly preferably of ⁇ 4 mm.
- the dry binder is a binder suitable for refractory products. These binders are given for example in the Practical Guide, page 28 / point 3.2.
- the liquid binder is preferably a binder from the following group: thermosetting synthetic resin binder, in particular phenol-formaldehyde resin, or molasses or lignin sulfonate or a sulfur-free binder, in particular a dextrose-based binder, an organic acid, sucrose, an A. Os binder, phosphoric acid, a phosphate binder, water glass, ethyl silicate, or a sulfate, e.g. As magnesium sulfate or aluminum sulfate, or a sol-gel system.
- the dry additive is an additive suitable for refractory products. These additives are given for example in the Practical Guide, page 28 / point 3.3. They are used to improve the processability or deformability or to modify the structure of the products and thus to achieve special properties.
- the offset according to the invention is used to produce refractory shaped or unshaped products according to the invention.
- a mixture or plastic mass is prepared from the dry mixture of the inventive offset with at least one liquid and / or solid binder and / or water. If the offset contains a liquid binder, the addition of water is not necessary, but possible. For optimum distribution of the binder (s) and / or water, mixing is carried out, for example, for 3 to 10 minutes.
- the mixture is poured into molds and pressed so that moldings are formed.
- the pressing pressures are in common ranges, e.g. at 60-180 MPa, preferably at 100-150 MPa.
- drying is carried out after pressing, e.g. between 60 and 200 ° C, in particular between 90 and 140 ° C.
- the drying is preferably carried out to a residual moisture content of between 0.1 and 0.6% by weight, in particular between 0.2 and 0.5% by weight, determined in accordance with DIN 51078: 2002-12.
- the production of moldings with conventional pressing pressures is possible in order to achieve the said porosities with the corresponding mechanical and thermal properties.
- the porosity of the sintered magnesia according to the invention which is used in particular in the usual grain sizes after the filler or Litzowkornver whatsoever the material mixtures throughout the grain build-up mixture that especially when pressing the pore volume according to the invention can form without the grains a supporting framework have to train in the structure according to DE 10 2013 020 732 A1.
- the shaped bodies according to the invention in particular the stones, can be used unfired or tempered or fired. Preferably, however, they are burned used.
- the green pressed stones are tempered in a ceramic kiln, e.g. a tunnel kiln, between 400 and 1000 ° C, in particular see between 500 and 800 ° C.
- a ceramic kiln e.g. a tunnel kiln
- a ceramic kiln such as a tunnel kiln
- ceramic burned preferably between 1200 and 1800 ° C, in particular between 1400 and 1700 ° C.
- it is oxidatively fired, but depending on the material composition, a reducing fire may also be advantageous.
- the thermal conductivity according to the hot-wire (parallel) method according to DIN 993-15: 2005-14 of the fired, shaped products according to the invention, in particular the stones, is preferably at 300 ° C. at 4.0 to 6.0 W / mK, preferably at 4.5 to 5.8 W / mK, at 700 ° C at 3.0 to 5.0 W / mK, preferably 3.0 to 4.8 W / mK, and at 1000 ° C at 2.0 to 3.5 W / mK, preferably at 2.0 to 3.2 W / mK.
- the fired, shaped products, in particular the stones preferably have a high open porosity of 22 to 45% by volume, preferably 23 to 35% by volume, determined in accordance with DIN EN 993-1: 1995-04.
- the fired, shaped products, in particular the stones preferably have a low bulk density of from 1.9 to 2.9 g / cm 3 , in particular from 2.0 to 2.8 g / cm 3 , determined in accordance with DIN 993-1: 1995-04 on.
- the cold compressive strength according to DIN EN 993-5: 1998-12 of the fired, shaped products according to the invention, in particular the stones, is preferably 30 and 100 MPa, in particular 45 and 90 MPa.
- the cold bending strength according to DIN EN 993-6: 1995-04 of the fired, shaped products according to the invention, in particular of the stones, is preferably from 2 to 18 MPa, in particular from 3 to 10 MPa.
- the gas permeability according to DIN EN 993-4: 1995-04 of the fired, shaped products according to the invention, in particular the stones, is preferably 0.2 to 8 nPm, in particular 0.5 to 6 nPm.
- the thermal shock resistance determined according to DIN EN 993-1 1: 2008-03 in air at an elevated test temperature of 1100 ° C. of the fired, shaped products according to the invention, in particular of the bricks, is preferably> 20 quench cycles, in particular> 30 quench cycles.
- a mixture of the dry material mixture according to the invention with at least one dry and / or liquid binder and / or water is also prepared. If the offset contains a liquid binder, the addition of water is not necessary, but possible.
- the invention provides highly porous, but with respect to thermal conductivity and pore size and thus the gas permeability as working food and also as a backrounding extremely suitable refractory products.
- Particularly advantageous is the small average pore diameter dso of the sintered magnesia according to the invention, which is preferably at 2-8 ⁇ and in the manufactured product, in addition to the average pore diameter dso of the matrix of about 4 ⁇ , still present (see Figure 2).
- the shaped, in particular pressed, or unshaped, large-ceramic refractory products according to the invention can be used as working feed in a fired industrial furnace aggregate, despite their high porosity, because they have the required mechanical, thermomechanical and thermochemical working feed properties.
- the caustic magnesia was pressed into almond-shaped pellets with dimensions of 13 ⁇ 20 ⁇ 30 mm 3 using a pelleting press. These green pellets had a grain density of 2.0 g / cm 3 .
- pellets were sintered in a high temperature laboratory furnace with a temperature profile in which the temperature was increased to 800 ° C at 2 K / min. After a holding time of 6 hours, the temperature was further raised to 1450 ° C. at 2 K / min. The residence time at this temperature was 5 h. The cooling was carried out continuously by heat emission of the high-temperature laboratory furnace to the environment.
- porous sintered magnesia was crushed and classified by sieving.
- the granules of the porous sintered magnesia according to the invention had a grain density of 2.59 g / cm 3 .
- the corresponding open porosity was 25.8% by volume (DIN EN 993-18: 2002-1 1, DIN EN 993-1: 1 195-04).
- the raw materials used had the following properties:
- the corresponding raw materials according to Table 3 with a particle size distribution by filler were mixed in a mixer for 3 min dry, provided with the liquid binder, and further mixed for 5 min.
- the mixture was placed on a hydraulic press and in a B-format for rotary kiln stones Pressed a pressing pressure according to Table 3.
- the stones were dried in a dryer at about 130 ° C and then fired at 1600 ° C in a tunnel oven for 50 hours oxidizing.
- the holding time at maximum temperature was 5 h.
- the burning shrinkage by measuring, the finished density by measuring and weighing, the open porosity according to DIN EN 993-1: 1995- 04, the cold compressive strength according to DIN EN 993-5: 1998-12, the cold bending strength according to DIN EN 993-6: 1995-04, the gas permeability according to DIN EN 993-4: 1995- 04 and the thermal conductivity according to the hot-wire (parallel) method DIN 993-15: 2005-14.
- the thermal shock resistance was determined in accordance with DIN EN 993-1 1: 2008-03 in air at an elevated test temperature of 1100 ° C.
- the stone properties compared to the conventional dense stones according to b) change in the case of a) and also c), which have a significantly increased porosity and a significantly reduced bulk density, without exerting a negative impact on the other stone properties.
- the gas permeability and the pore diameter are reduced in the bricks according to the present invention.
- the reduction in the bulk density and the increase in the open porosity compared with b) are clear.
- the average pore diameter dso is dramatically reduced compared to b) and c), so that there is a reduced infiltration tendency towards alkalis and clinker melts.
- the cold compressive strength and the cold bending strength remain safe in the typical area for dense stones.
- Example 3 The stone properties compared to the stones according to Example 1 change only slightly with the use of porous magnesia and porous spinel, but a further reduced thermal conductivity can be observed. All other positive mechanical and thermal properties are retained.
- Example 3 The stone properties compared to the stones according to Example 1 change only slightly with the use of porous magnesia and porous spinel, but a further reduced thermal conductivity can be observed. All other positive mechanical and thermal properties are retained.
- Table 4 shows that the porous sintered magnesia according to the invention can also be used with magnesia pebbles, the porosity is significantly increased by the use of the sintered magnesia according to the invention, all positive mechanical and thermal properties are retained.
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- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
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- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
Description
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Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
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EP18769685.1A EP3523264B1 (de) | 2017-09-15 | 2018-09-13 | Verfahren zur herstellung einer porösen sintermagnesia, versatz zur herstellung eines grobkeramischen feuerfesten erzeugnisses mit einer körnung aus der sintermagnesia, derartiges erzeugnis sowie verfahren zu seiner herstellung, zustellung eines industrieofens und industrieofen |
JP2019542172A JP7299157B2 (ja) | 2017-09-15 | 2018-09-13 | 多孔質焼結マグネシアを製造する方法、焼結マグネシアからなる造粒物(Koernung)を有する粗セラミックの(grobkeramisch)耐火性生産物を製造するためのバッチ、このような生産物、および生産物を製造する方法、工業炉の裏張り(Zustellung)、ならびに工業炉 |
RU2020100219A RU2752414C2 (ru) | 2017-09-15 | 2018-09-13 | Способ получения пористой спеченной магнезии, шихты для получения грубокерамического огнеупорного изделия с зернистым материалом из спеченной магнезии, изделия такого рода, а также способы их получения, футеровки промышленной печи и промышленная печь |
MX2020002853A MX2020002853A (es) | 2017-09-15 | 2018-09-13 | Procedimiento para la produccion de una magnesia sinterizada porosa, mezcla para la produccion de un producto ceramico grueso refractario con una granulacion de magnesia sinterizada, producto de este tipo asi como procedimiento para su produccion, revestimiento interior con mamposteria de un horno industrial y horno industrial. |
AU2018334019A AU2018334019B2 (en) | 2017-09-15 | 2018-09-13 | Method for producing a porous sintered magnesia, batch for producing a coarse ceramic refractory product having a granular material made of the sintered magnesia, such a product and method for its production, lining of an industrial furnace, and industrial furnace |
PL18769685.1T PL3523264T3 (pl) | 2017-09-15 | 2018-09-13 | Sposób wytwarzania porowatej magnezji spiekanej, zestaw do wytwarzania wyrobu ogniotrwałego z ceramiki technicznej z materiałem ziarnistym z magnezji spiekanej, taki wyrób oraz sposób jego wytwarzania, wyłożenie pieca przemysłowego i piec przemysłowy |
RS20230947A RS64721B1 (sr) | 2017-09-15 | 2018-09-13 | Postupak za izradu porozne sinterovane magnezije, šarža za izradu grubog keramičkog vatrostalnog proizvoda sa frakcijom zrna iz sinterovane magnezije, proizvod ove vrste kao i postupak za njegovu izradu, obloga industrijskih peći i industrijska peć |
CN201880011985.4A CN110325487B (zh) | 2017-09-15 | 2018-09-13 | 多孔烧结氧化镁的制备方法、回填料、这种类型的产品及制备方法、工业炉内衬和工业炉 |
KR1020197027533A KR102399226B1 (ko) | 2017-09-15 | 2018-09-13 | 다공성 소결 마그네시아의 제조 방법, 소결 마그네시아 과립을 포함하는 중점토 세라믹 내화성 제품의 제조를 위한 뒤채움재, 그 제품 및 그의 제조 방법, 공업로의 라이닝, 및 공업로 |
ES18769685T ES2956739T3 (es) | 2017-09-15 | 2018-09-13 | Procedimiento para la producción de una magnesia sinterizada porosa, combinación para la producción de un producto refractario cerámico ordinario con una granulación de la magnesia sinterizada, producto de este tipo así como procedimiento para su producción, revestimiento interior con mampostería de un horno industrial y horno industrial |
CA3070785A CA3070785C (en) | 2017-09-15 | 2018-09-13 | Method for producing a porous sintered magnesia, batch for producing a coarse ceramic refractory product having a granular material made of the sintered magnesia, such a product and method for its production, lining of an industrial furnace, and industrial furnace |
JOP/2020/0061A JOP20200061A1 (ar) | 2017-09-15 | 2018-09-13 | طريقة لإنتاج ماغنسيا ملبدة مسامية، دفعة لإنتاج منتج خزفي خشن مقاوم للحرارة به مادة حبيبية مصنوعة من الماغنسيا الملبدة، وهذا المنتج وطريقة لإنتاجه، تبطين فرن صناعي، وفرن صناعي |
US16/646,409 US11440847B2 (en) | 2017-09-15 | 2018-09-13 | Method for producing a porous sintered magnesia, backfill for producing a heavy-clay refractory product with a granulation from the sintered magnesia, product of this type, and method for the production thereof, lining of an industrial furnace and industrial furnace |
BR112020005054-7A BR112020005054A2 (pt) | 2017-09-15 | 2018-09-13 | processo para a produção de um óxido de magnésio sinterizado poroso, mistura para a produção de um produto cerâmico bruto resistente ao fogo com uma granulação do óxido de magnésio sinterizado, tal produto, assim como processo para sua produção, revestimento de um forno industrial e forno industrial |
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DE102017121452.6A DE102017121452B9 (de) | 2017-09-15 | 2017-09-15 | Verfahren zur Herstellung einer porösen Sintermagnesia, Versatz zur Herstellung eines grobkeramischen feuerfesten Erzeugnisses mit einer Körnung aus der Sintermagnesia, Verwendung des Versatzes zur Herstellung des Erzeugnisses sowie Verfahren zur Herstellung des Erzeugnisses |
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US (1) | US11440847B2 (de) |
EP (1) | EP3523264B1 (de) |
JP (1) | JP7299157B2 (de) |
KR (1) | KR102399226B1 (de) |
CN (1) | CN110325487B (de) |
AU (1) | AU2018334019B2 (de) |
BR (1) | BR112020005054A2 (de) |
CA (1) | CA3070785C (de) |
DE (1) | DE102017121452B9 (de) |
ES (1) | ES2956739T3 (de) |
JO (1) | JOP20200061A1 (de) |
MX (1) | MX2020002853A (de) |
PL (1) | PL3523264T3 (de) |
RS (1) | RS64721B1 (de) |
RU (1) | RU2752414C2 (de) |
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US10759697B1 (en) | 2019-06-11 | 2020-09-01 | MSB Global, Inc. | Curable formulations for structural and non-structural applications |
WO2021123363A1 (de) * | 2019-12-18 | 2021-06-24 | Refratechnik Holding Gmbh | Versatz zur herstellung eines grobkeramischen feuerfesten basischen erzeugnisses, derartiges erzeugnis sowie verfahren zu seiner herstellung, zustellung eines industrieofens und industrieofen |
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CN110407546B (zh) * | 2019-06-19 | 2021-11-23 | 中盐安徽红四方新型建材科技有限公司 | 多孔蒸压砂砖 |
KR102344655B1 (ko) * | 2019-12-20 | 2021-12-29 | (주)포스코케미칼 | 시멘트 클린커 코팅성 및 알카리 침투 저항성이 우수한 소성 마그네시아 스피넬질 내화 조성물 |
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US10759697B1 (en) | 2019-06-11 | 2020-09-01 | MSB Global, Inc. | Curable formulations for structural and non-structural applications |
US11008252B2 (en) | 2019-06-11 | 2021-05-18 | MSB Global, Inc. | Curable formulations for structural and non-structural applications |
US11655187B2 (en) | 2019-06-11 | 2023-05-23 | Partanna Global, Inc. | Curable formulations for structural and non-structural applications |
WO2021123363A1 (de) * | 2019-12-18 | 2021-06-24 | Refratechnik Holding Gmbh | Versatz zur herstellung eines grobkeramischen feuerfesten basischen erzeugnisses, derartiges erzeugnis sowie verfahren zu seiner herstellung, zustellung eines industrieofens und industrieofen |
CN114761370A (zh) * | 2019-12-18 | 2022-07-15 | 耐火材料控股有限公司 | 用于制造碱性粗陶瓷耐火制品的配合料、这种制品及其制造方法、工业炉的衬里以及工业炉 |
CN114761370B (zh) * | 2019-12-18 | 2023-07-28 | 耐火材料控股有限公司 | 用于制造碱性粗陶瓷耐火制品的配合料、这种制品及其制造方法、工业炉的衬里以及工业炉 |
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PL3523264T3 (pl) | 2024-02-19 |
CA3070785C (en) | 2024-05-14 |
EP3523264A1 (de) | 2019-08-14 |
CN110325487A (zh) | 2019-10-11 |
DE102017121452B9 (de) | 2024-04-04 |
RU2020100219A (ru) | 2021-06-30 |
DE102017121452A9 (de) | 2019-10-10 |
RU2752414C2 (ru) | 2021-07-27 |
RS64721B1 (sr) | 2023-11-30 |
AU2018334019B2 (en) | 2023-10-05 |
ES2956739T3 (es) | 2023-12-27 |
US11440847B2 (en) | 2022-09-13 |
JP2021502941A (ja) | 2021-02-04 |
JOP20200061A1 (ar) | 2020-03-15 |
US20200277231A1 (en) | 2020-09-03 |
DE102017121452A1 (de) | 2019-03-21 |
DE102017121452B4 (de) | 2024-01-25 |
BR112020005054A2 (pt) | 2020-09-15 |
KR102399226B1 (ko) | 2022-05-19 |
KR20190122728A (ko) | 2019-10-30 |
RU2020100219A3 (de) | 2021-06-30 |
AU2018334019A1 (en) | 2020-02-20 |
EP3523264B1 (de) | 2023-08-16 |
CN110325487B (zh) | 2022-10-11 |
JP7299157B2 (ja) | 2023-06-27 |
MX2020002853A (es) | 2020-07-22 |
CA3070785A1 (en) | 2019-03-21 |
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