JP6599574B1 - Curing accelerator, cement composition, and amorphous refractory - Google Patents
Curing accelerator, cement composition, and amorphous refractory Download PDFInfo
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- JP6599574B1 JP6599574B1 JP2019021725A JP2019021725A JP6599574B1 JP 6599574 B1 JP6599574 B1 JP 6599574B1 JP 2019021725 A JP2019021725 A JP 2019021725A JP 2019021725 A JP2019021725 A JP 2019021725A JP 6599574 B1 JP6599574 B1 JP 6599574B1
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- 239000004568 cement Substances 0.000 title claims abstract description 64
- 239000000203 mixture Substances 0.000 title claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 15
- UJPWWRPNIRRCPJ-UHFFFAOYSA-L strontium;dihydroxide;octahydrate Chemical compound O.O.O.O.O.O.O.O.[OH-].[OH-].[Sr+2] UJPWWRPNIRRCPJ-UHFFFAOYSA-L 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000011823 monolithic refractory Substances 0.000 claims 1
- UUCCCPNEFXQJEL-UHFFFAOYSA-L strontium dihydroxide Chemical compound [OH-].[OH-].[Sr+2] UUCCCPNEFXQJEL-UHFFFAOYSA-L 0.000 abstract description 20
- 229910001866 strontium hydroxide Inorganic materials 0.000 abstract description 20
- DDGDWXGKPCHUCI-UHFFFAOYSA-N strontium;hydrate Chemical compound O.[Sr] DDGDWXGKPCHUCI-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 239000002994 raw material Substances 0.000 description 12
- 239000004480 active ingredient Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 8
- 229910001388 sodium aluminate Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000002939 deleterious effect Effects 0.000 description 7
- 239000002270 dispersing agent Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 6
- 238000013329 compounding Methods 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 239000002562 thickening agent Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 231100000647 material safety data sheet Toxicity 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- -1 CaCl 2 Chemical compound 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 150000004645 aluminates Chemical class 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 description 2
- 150000004692 metal hydroxides Chemical class 0.000 description 2
- 125000005341 metaphosphate group Chemical group 0.000 description 2
- 229940045916 polymetaphosphate Drugs 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 241001460678 Napo <wasp> Species 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 229910026551 ZrC Inorganic materials 0.000 description 1
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- CAVCGVPGBKGDTG-UHFFFAOYSA-N alumanylidynemethyl(alumanylidynemethylalumanylidenemethylidene)alumane Chemical compound [Al]#C[Al]=C=[Al]C#[Al] CAVCGVPGBKGDTG-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910052849 andalusite Inorganic materials 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 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
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 229940048084 pyrophosphate Drugs 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052851 sillimanite Inorganic materials 0.000 description 1
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000001433 sodium tartrate Substances 0.000 description 1
- 229960002167 sodium tartrate Drugs 0.000 description 1
- 235000011004 sodium tartrates Nutrition 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- UGTZMIPZNRIWHX-UHFFFAOYSA-K sodium trimetaphosphate Chemical compound [Na+].[Na+].[Na+].[O-]P1(=O)OP([O-])(=O)OP([O-])(=O)O1 UGTZMIPZNRIWHX-UHFFFAOYSA-K 0.000 description 1
- HIEHAIZHJZLEPQ-UHFFFAOYSA-M sodium;naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 HIEHAIZHJZLEPQ-UHFFFAOYSA-M 0.000 description 1
- WYIXXSYDQFHKFE-UHFFFAOYSA-L strontium;dihydroxide;hydrate Chemical group O.[OH-].[OH-].[Sr+2] WYIXXSYDQFHKFE-UHFFFAOYSA-L 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 1
- 229920006312 vinyl chloride fiber Polymers 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
【課題】新規な硬化促進剤、セメント組成物、及び不定形耐火物を提供する。【解決手段】セメントの硬化促進剤は、水酸化ストロンチウム及び/又はその水和物を含む。水酸化ストロンチウム及び/又はその水和物は、水酸化ストロンチウム8水和物であってもよい。セメントは、アルミナセメントであってもよい。【選択図】なしA novel curing accelerator, cement composition, and amorphous refractory are provided. A cement hardening accelerator includes strontium hydroxide and / or a hydrate thereof. The strontium hydroxide and / or hydrate thereof may be strontium hydroxide octahydrate. The cement may be an alumina cement. [Selection figure] None
Description
本発明は、硬化促進剤、セメント組成物、及び不定形耐火物に関する。 The present invention relates to a curing accelerator, a cement composition, and an amorphous refractory.
耐火性骨材、及び結合材としてのセメントを含む不定形耐火物は、流し込み材、コテ塗り材、吹付け材等の形態で使用され、使用時に水と混ぜて施工することで硬化し耐火構造物として機能する。耐火構造物として保形するためには、セメントと水分が水和反応により硬化することが必要となる。 Unshaped refractories including refractory aggregate and cement as binder are used in the form of casting material, iron coating material, spraying material, etc. It functions as a thing. In order to retain the shape as a refractory structure, it is necessary that the cement and moisture be cured by a hydration reaction.
この硬化反応は温度に依存して、一般に温度が高い場合には早く硬化反応が起き、温度が低い場合には硬化反応が遅延する。このことから実使用の場面では、不定形耐火物を冬季に使用した場合に、硬化時間が長くかかり工期が延長するなどの問題が生じやすい。 This curing reaction depends on the temperature. Generally, the curing reaction occurs early when the temperature is high, and the curing reaction is delayed when the temperature is low. For this reason, in actual use situations, when an irregular refractory is used in winter, problems such as a long curing time and a long construction period are likely to occur.
この硬化遅延を防ぐため、硬化促進剤としてアルミン酸ソーダを使用している。しかし、労働安全衛生法の改正でアルミン酸ソーダが劇物指定を受けたことにより、製造側はアルミン酸ソーダの使用の制限を受け、使用側もアルミン酸ソーダを含む劇物混入品の使用は推奨されない(例えば、非特許文献1)。 In order to prevent this curing delay, sodium aluminate is used as a curing accelerator. However, due to the fact that sodium aluminate was designated as a deleterious substance by the revision of the Industrial Safety and Health Law, the manufacturer was restricted from using sodium aluminate, and the use side was not allowed to use deleterious substances mixed with sodium aluminate. Not recommended (for example, Non-Patent Document 1).
本発明は、新規な硬化促進剤、セメント組成物、及び不定形耐火物を提供することを目的とする。 An object of this invention is to provide a novel hardening accelerator, a cement composition, and an amorphous refractory.
本発明者らは、上記課題に鑑み鋭意検討を重ねた結果、非劇物である水酸化ストロンチウム及び/又はその水和物(以下、「水酸化ストロンチウム系有効成分」という。)が、アルミン酸ソーダと同様にセメントの硬化を促進することができることを見出し、この知見に基づいて更に検討を重ね、本発明を完成した。 As a result of intensive studies in view of the above problems, the present inventors have found that strontium hydroxide and / or its hydrate (hereinafter referred to as “strontium hydroxide-based active ingredient”), which is a non- deleterious substance, is aluminate. The inventors found that cement hardening can be promoted in the same manner as soda, and further studies were made based on this finding, thereby completing the present invention.
すなわち、本発明は、次の態様を含む。
項1.水酸化ストロンチウム及び/又はその水和物を含む、セメントの硬化促進剤。
項2.水酸化ストロンチウム及び/又はその水和物が、水酸化ストロンチウム8水和物である、項1に記載の硬化促進剤。
項3.セメントが、アルミナセメントである、項1又は2に記載の硬化促進剤。
項4.セメントと項1又は2に記載の硬化促進剤とを含む、セメント組成物。
項5.耐火性骨材とセメントと項1又は2に記載の硬化促進剤とを含む、不定形耐火物。
項6.硬化促進剤の含有量が、耐火性骨材100質量部に対して、0.001〜1質量部である、項5に記載の不定形耐火物。
That is, the present invention includes the following aspects.
Item 1. A cement hardening accelerator comprising strontium hydroxide and / or a hydrate thereof.
Item 2. Item 2. The curing accelerator according to Item 1, wherein the strontium hydroxide and / or hydrate thereof is strontium hydroxide octahydrate.
Item 3. Item 3. The curing accelerator according to Item 1 or 2, wherein the cement is alumina cement.
Item 4. A cement composition comprising cement and the curing accelerator according to Item 1 or 2.
Item 5. An amorphous refractory comprising a fireproof aggregate, cement, and the curing accelerator according to Item 1 or 2.
Item 6. Item 6. The amorphous refractory according to Item 5, wherein the content of the curing accelerator is 0.001 to 1 part by mass with respect to 100 parts by mass of the refractory aggregate.
本発明の硬化促進剤は、セメントの硬化を促進することができる。また、本発明の硬化促進剤は、非劇物である水酸化ストロンチウム系有効成分を含んでいるため、安全性に優れている。 The curing accelerator of the present invention can promote the curing of cement. Moreover, since the hardening accelerator of this invention contains the strontium hydroxide type | system | group active ingredient which is a non- deleterious substance, it is excellent in safety.
以下、本発明の硬化促進剤、セメント組成物、及び不定形耐火物について、詳細に説明する。 Hereinafter, the hardening accelerator, cement composition, and amorphous refractory of the present invention will be described in detail.
<硬化促進剤>
硬化促進剤は、セメントの硬化を促進するためのものである。また、硬化促進剤は、セメントの硬化速度が温度等に応じて変化するため、セメントの硬化速度を調整する目的で使用される。このような点から、硬化促進剤は、硬化調整剤ということもできる。
セメントとしては、特に制限されないが、例えば、ポルトランドセメント(例:普通ポルトランドセメント、早強ポルトランドセメント)、混合セメント(例:高炉セメント、フライアッシュセメント、シリカセメント)、アルミナセメント、これらの組合せが挙げられる。これらのうち、アルミナセメントが好ましい。
アルミナセメントとは、アルミナ(Al2O3)を含むセメントをいう。
アルミナセメントは、通常、アルミン酸石灰塩(CaOとAl2O3の2成分系化合物)を含む。アルミン酸石灰塩としては、例えば、3CaO・Al2O3、2CaO・Al2O3、CaO・Al2O3、CaO・2Al2O3、CaO・6Al2O3、12CaO・7Al2O3、これらの組合せが挙げられる。
硬化促進剤は、水酸化ストロンチウム系有効成分を含む。水酸化ストロンチウム系有効成分は、好ましくは水酸化ストロンチウムの水和物であり、さらに好ましくは水酸化ストロンチウム8水和物である。
水酸化ストロンチウム系有効成分の含有量は、硬化促進剤の総質量に対して、例えば、50質量%以上、好ましくは70質量%以上、より好ましくは90質量%以上、さらに好ましくは95質量%以上であり、さらにより好ましくは99質量%以上である。
硬化促進剤は、さらに他の成分を含んでいてもよい。他の成分としては、無機系成分[例えば、塩化物(例:NaCl、CaCl2、KCl)、亜硝酸塩(例:Ca(NO2)2、NaNO2、KNO2)、硝酸塩(例:Ca(NO3)2、NaNO3、KNO3)、硫酸塩(例:CaSO4、Na2SO4、K2SO4)、チオシアン塩(例:NaSCN)、炭酸塩(例:Li2CO3、Na2CO3、K2CO3)、珪酸ソーダ、アルミナ類(例:Al(OH)3、Al2O3)]、有機系成分[例えば、アミン類、有機酸Ca塩、無水マレイン酸]が挙げられる。これらは、単独で又は二種以上組み合わせて使用することができる。なお、これらの中には、分散剤としての機能を兼ね備える成分(例:珪酸ソーダ)も含まれ、当該成分は分散剤として使用することもできる。
硬化促進剤は、安全性の点から、毒物又は劇物に指定されている成分(例:アルミン酸ソーダ)を含まないことが好ましい。
<Curing accelerator>
A hardening accelerator is for accelerating hardening of cement. Moreover, since the hardening rate of a cement changes according to temperature etc., a hardening accelerator is used in order to adjust the hardening rate of a cement. From such a point, the curing accelerator can also be referred to as a curing regulator.
The cement is not particularly limited, and examples thereof include Portland cement (eg, ordinary Portland cement, early-strength Portland cement), mixed cement (eg, blast furnace cement, fly ash cement, silica cement), alumina cement, and combinations thereof. It is done. Of these, alumina cement is preferred.
Alumina cement refers to cement containing alumina (Al 2 O 3 ).
Alumina cement usually contains aluminate lime salt (a two-component compound of CaO and Al 2 O 3 ). The calcium aluminate, for example, 3CaO · Al 2 O 3, 2CaO · Al 2 O 3, CaO · Al 2 O 3, CaO · 2Al 2 O 3, CaO · 6Al 2 O 3, 12CaO · 7Al 2 O 3 And combinations thereof.
The curing accelerator contains a strontium hydroxide-based active ingredient. The strontium hydroxide active ingredient is preferably strontium hydroxide hydrate, more preferably strontium hydroxide octahydrate.
The content of the strontium hydroxide-based active ingredient is, for example, 50% by mass or more, preferably 70% by mass or more, more preferably 90% by mass or more, and further preferably 95% by mass or more, based on the total mass of the curing accelerator. And even more preferably 99% by mass or more.
The curing accelerator may further contain other components. Other components include inorganic components [eg, chloride (eg, NaCl, CaCl 2 , KCl), nitrite (eg: Ca (NO 2 ) 2 , NaNO 2 , KNO 2 ), nitrate (eg, Ca ( NO 3 ) 2 , NaNO 3 , KNO 3 ), sulfate (eg CaSO 4 , Na 2 SO 4 , K 2 SO 4 ), thiocyanate (eg NaSCN), carbonate (eg Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 ), sodium silicate, aluminas (eg, Al (OH) 3 , Al 2 O 3 )], organic components [eg, amines, organic acid Ca salts, maleic anhydride] Can be mentioned. These can be used alone or in combination of two or more. In addition, in these, the component (Example: Sodium silicate) which has a function as a dispersing agent is also contained, The said component can also be used as a dispersing agent.
It is preferable that a hardening accelerator does not contain the component (For example: sodium aluminate) designated as a poisonous substance or a deleterious substance from a safety point.
<セメント組成物>
セメント組成物は、一実施態様において、セメント及び硬化促進剤を含む。
硬化促進剤の配合量は、低温の場合等に硬化反応を促進する点から、セメント100質量部に対して、0.05質量部以上が好ましく、0.1質量部以上がさらに好ましく、0.5質量部以上が特に好ましい。また、硬化促進剤の配合量は、取扱性及び施工性の点から、セメント100質量部に対して、20質量部以下が好ましく、15質量部以下がさらに好ましく、10質量部以下が特に好ましい。
セメント組成物は、別の実施態様において、セメント及び水酸化ストロンチウム系有効成分を含む。水酸化ストロンチウム系有効成分の配合量は、前記実施態様における硬化促進剤の配合量と同様の配合量であることができる。
セメント及び水酸化ストロンチウム系有効成分は、「硬化促進剤」の項で例示したものと同じ成分を使用することができ、好ましい成分も同じである。
<Cement composition>
The cement composition, in one embodiment, includes cement and a set accelerator.
The blending amount of the curing accelerator is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, more preferably 0.1 parts by mass or more with respect to 100 parts by mass of the cement from the viewpoint of promoting the curing reaction at a low temperature or the like. 5 parts by mass or more is particularly preferable. In addition, the blending amount of the curing accelerator is preferably 20 parts by mass or less, more preferably 15 parts by mass or less, and particularly preferably 10 parts by mass or less with respect to 100 parts by mass of cement from the viewpoint of handleability and workability.
In another embodiment, the cement composition includes cement and a strontium hydroxide-based active ingredient. The compounding amount of the strontium hydroxide-based active ingredient can be the same as the compounding amount of the curing accelerator in the above embodiment.
As the cement and the strontium hydroxide-based active ingredient, the same ingredients as those exemplified in the section of “curing accelerator” can be used, and preferred ingredients are also the same.
セメント組成物は、さらに添加剤を含んでいてもよい。添加剤としては、例えば、耐火性粉末、分散剤、爆裂防止剤、増粘剤、これらの組合せが挙げられる。 The cement composition may further contain an additive. Examples of the additive include a refractory powder, a dispersant, an explosion prevention agent, a thickener, and a combination thereof.
耐火性粉末としては、特に制限されないが、例えば、アルミナ原料(例:電融アルミナ、焼結アルミナ、仮焼アルミナなどの高アルミナ原料)、アルミナ−シリカ原料(例:仮焼ボーキサイト、ムライト、シリマナイト、カイヤナイト、アンダルサイト)、シリカ−アルミナ原料(例:ロー石、シャモット、粘土)、珪酸質原料(例:シリカ、珪砂、珪石、溶融石英)、スピネル原料(例:クロム鉄鉱、焼結スピネル、電融スピネル、マグクロ)、塩基性原料(例:マグネシアクリンカー、フォルステライト、ドロマイトクリンカー、カルシア)、炭化物質原料(例:ジルコン質原料、ジルコニア質原料、炭化珪素、炭化ジルコニウム、炭化アルミニウム、炭化硼素)、窒化物質原料(例:窒化珪素、窒化ジルコニウム、窒化硼素、窒化アルミニウム)、炭素質原料(例:コークス、天然黒鉛、人造黒鉛、無煙炭、カーボンブラック、カーボンれんが屑、電極屑)、珪酸ソーダ塊、珪素、酸化クロムなどが挙げられる。これらは、単独で又は二種以上組み合わせて使用することができる。 Although it does not restrict | limit especially as a refractory powder, For example, an alumina raw material (Example: High alumina raw materials, such as a fused alumina, sintered alumina, calcined alumina), an alumina-silica raw material (Example: calcined bauxite, mullite, sillimanite) , Kayanite, andalusite), silica-alumina raw materials (eg, rholite, chamotte, clay), siliceous raw materials (eg, silica, silica sand, silica, fused quartz), spinel raw materials (eg, chromite, sintered spinel) , Electrofused spinel, magcro), basic materials (eg, magnesia clinker, forsterite, dolomite clinker, calcia), carbide materials (eg, zircon material, zirconia material, silicon carbide, zirconium carbide, aluminum carbide, carbonized) Boron), nitride materials (eg silicon nitride, zirconium nitride, boron nitride, aluminum nitride) Ion), a carbonaceous material (e.g. coke, natural graphite, artificial graphite, anthracite, carbon black, carbon brick scraps, electrode chips), sodium silicate mass, silicon, chromium oxide and the like. These can be used alone or in combination of two or more.
分散剤としては、例えば、メタリン酸塩(例:NaPO3)、ポリメタリン酸塩(例:トリメタリン酸ソーダ、ヘキサメタリン酸ソーダ)、ピロリン酸塩(例:ピロリン酸ソーダ)、カルボン酸塩(例:クエン酸ソーダ、酒石酸ソーダ)、ポリカルボン酸塩系重合体(例:ポリアクリル酸ソーダ)、有機スルホン酸塩(例:ナフタレンスルホン酸ソーダ)、これらの組合せが挙げられる。なお、これらの中には、硬化促進剤としての機能を兼ね備える成分(例:メタリン酸塩、ポリメタリン酸塩)も含まれ、当該成分は硬化促進剤として使用することもできる。 Examples of the dispersant include metaphosphate (eg, NaPO 3 ), polymetaphosphate (eg, sodium trimetaphosphate, sodium hexametaphosphate), pyrophosphate (eg: sodium pyrophosphate), carboxylate (eg, citrate). Acid soda, sodium tartrate), polycarboxylate-based polymers (eg, sodium polyacrylate), organic sulfonates (eg, sodium naphthalene sulfonate), and combinations thereof. In addition, in these, the component (Example: metaphosphate, polymetaphosphate) which has a function as a hardening accelerator is also contained, and the said component can also be used as a hardening accelerator.
爆裂防止剤としては、例えば、発泡剤(例:金属アルミニウム、金属マグネシウム)、有機繊維(例:ビニロン繊維、ポリプロピレン繊維、塩化ビニル繊維)、塩基性コロイド(例:乳酸アルミニウム)、窒素ガス発生分解繊維、フミン酸類が挙げられる。これらは、単独で又は二種以上組み合わせて使用することができる。 Examples of explosion prevention agents include foaming agents (eg, metallic aluminum, metallic magnesium), organic fibers (eg, vinylon fibers, polypropylene fibers, vinyl chloride fibers), basic colloids (eg, aluminum lactate), and nitrogen gas generation and decomposition. Examples thereof include fibers and humic acids. These can be used alone or in combination of two or more.
増粘剤としては、例えば、メチルセルロース、カルボキシメチルセルロース、ポリビニルアルコール、ポリアクリルアミドが挙げられる。これらは、単独で又は二種以上組み合わせて使用することができる。 Examples of the thickener include methyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, and polyacrylamide. These can be used alone or in combination of two or more.
添加剤の配合量は、その種類、用途等に応じて適宜選択することができ、例えば、セメント100質量部に対して、0.5〜5000質量部の範囲から選択することができ、セメントの配合量よりも少量(例:1〜80質量部)であってもよく、セメントの配合量と同量以上(例:100〜3000質量部)であってもよい。 The blending amount of the additive can be appropriately selected according to the type, use, etc., for example, can be selected from the range of 0.5 to 5000 parts by mass with respect to 100 parts by mass of cement. It may be a smaller amount (e.g., 1 to 80 parts by mass) than the blending amount, or may be the same or more (e.g., 100 to 3000 parts by mass) as the blending amount of cement.
<不定形耐火物>
不定形耐火物は、一実施態様において、耐火性骨材、セメント、及び硬化促進剤を含む。
セメントの配合量は、耐火性骨材との結合性の点から、耐火性骨材100質量部に対して、0.1質量部以上が好ましく、1質量部以上がさらに好ましい。また、セメントの配合量は、硬度の点から、耐火性骨材100質量部に対して、15質量部以下が好ましく、10質量部以下がさらに好ましい。
硬化促進剤の配合量は、低温の場合等に硬化反応を促進する点から、耐火性骨材100質量部(又は耐火性骨材とセメントの合計100質量部)に対して、0.001質量部以上が好ましく、0.005質量部以上がより好ましく、0.01質量部以上がさらに好ましい。また、硬化促進剤の配合量は、取扱性及び施工性の点から、耐火性骨材100質量部(又は耐火性骨材とセメントの合計100質量部)に対して、1質量部以下が好ましく、0.8質量部以下がより好ましく、0.5質量部以下がさらに好ましい。なお、セメント100質量部に対する硬化促進剤の配合量は、「セメント組成物」の項で例示した配合量と同じであってもよい。
不定形耐火物は、別の実施態様において、耐火性骨材、セメント、及び水酸化ストロンチウム系有効成分を含む。
セメントの配合量は、前記実施態様と同様の配合量であることができる。また、水酸化ストロンチウム系有効成分の配合量は、前記実施態様における硬化促進剤の配合量と同じであってもよい。
<Unshaped refractories>
The amorphous refractory includes, in one embodiment, refractory aggregate, cement, and a hardening accelerator.
The blending amount of the cement is preferably 0.1 parts by mass or more and more preferably 1 part by mass or more with respect to 100 parts by mass of the refractory aggregate from the viewpoint of bonding with the refractory aggregate. The cement content is preferably 15 parts by mass or less and more preferably 10 parts by mass or less with respect to 100 parts by mass of the refractory aggregate in terms of hardness.
The blending amount of the curing accelerator is 0.001 mass with respect to 100 mass parts of the refractory aggregate (or 100 mass parts of the refractory aggregate and cement in total) from the viewpoint of promoting the curing reaction at a low temperature or the like. Part or more, preferably 0.005 part by weight or more, more preferably 0.01 part by weight or more. Further, the blending amount of the hardening accelerator is preferably 1 part by mass or less with respect to 100 parts by mass of the refractory aggregate (or 100 parts by mass in total of the refractory aggregate and the cement) from the viewpoint of handleability and workability. 0.8 parts by mass or less is more preferable, and 0.5 parts by mass or less is more preferable. In addition, the compounding quantity of the hardening accelerator with respect to 100 mass parts of cement may be the same as the compounding quantity illustrated by the term of the "cement composition".
The amorphous refractory includes, in another embodiment, refractory aggregate, cement, and a strontium hydroxide-based active ingredient.
The blending amount of cement can be the same blending amount as in the above embodiment. Moreover, the compounding quantity of a strontium hydroxide type | system | group active ingredient may be the same as the compounding quantity of the hardening accelerator in the said embodiment.
耐火性骨材としては、「セメント組成物」の項で耐火性粉末として例示したものと同じ成分を使用することができる。耐火性骨材としては、アルミナ原料、アルミナ−シリカ原料、シリカ−アルミナ原料、及び珪酸質原料から選択される少なくとも一種が好ましく、アルミナ、仮焼ボーキサイト、及びシリカから選択される少なくとも一種がさらに好ましい。
耐火性骨材の粒径(又は粒度)は、特に制限されないが、例えば、5.0mm以下、好ましくは4.5mm以下、さらに好ましくは4.0mm以下である。耐火性骨材の粒径(又は粒度)は、例えば、篩い分けに用いられるメッシュの目開きの寸法に基づく。
耐火性骨材は、粒径が100μmを超える粗粉、粒径が100μm以下の微粉(粒径が50μm以下の超微粉を含む)、及びこれらの組合せを含んでいてもよい。
耐火性骨材として、粗粉と微粉を組み合わせる場合、粗粉と微粉の質量比は、例えば、60:40〜99:1、好ましくは70:30〜95:5、さらに好ましくは80:20〜90:10である。
セメント及び水酸化ストロンチウム系有効成分は、「硬化促進剤」の項で例示したものと同じ成分を使用することができ、好ましい成分も同じである。
As the refractory aggregate, the same components as those exemplified as the refractory powder in the section “Cement composition” can be used. The refractory aggregate is preferably at least one selected from alumina raw materials, alumina-silica raw materials, silica-alumina raw materials, and siliceous raw materials, and more preferably at least one selected from alumina, calcined bauxite, and silica. .
The particle size (or particle size) of the refractory aggregate is not particularly limited, but is, for example, 5.0 mm or less, preferably 4.5 mm or less, and more preferably 4.0 mm or less. The particle size (or particle size) of the refractory aggregate is based on, for example, the size of mesh openings used for sieving.
The refractory aggregate may include coarse powder having a particle size of more than 100 μm, fine powder having a particle size of 100 μm or less (including ultrafine powder having a particle size of 50 μm or less), and combinations thereof.
When combining coarse powder and fine powder as a fireproof aggregate, the mass ratio of coarse powder to fine powder is, for example, 60:40 to 99: 1, preferably 70:30 to 95: 5, and more preferably 80:20 to 90:10.
As the cement and the strontium hydroxide-based active ingredient, the same ingredients as those exemplified in the section of “curing accelerator” can be used, and preferred ingredients are also the same.
不定形耐火物は、さらに添加剤を含んでいてもよい。添加剤としては、例えば、分散剤、爆裂防止剤、増粘剤、これらの組合せが挙げられる。
分散剤としては、「セメント組成物」の項で例示したものと同じ成分を使用することができる。分散剤の配合量は、特に制限されないが、耐火性骨材100質量部(又は耐火性骨材とセメントの合計100質量部)に対して、例えば、0.001〜1質量部、好ましくは、0.01〜0.5質量部である。
爆裂防止剤としては、「セメント組成物」の項で例示したものと同じ成分を使用することができる。爆裂防止剤の配合量は、特に制限されないが、耐火性骨材100質量部(又は耐火性骨材とセメントの合計100質量部)に対して、例えば、0.001〜1質量部であり、好ましくは0.01〜0.5質量部である。
増粘剤としては、「セメント組成物」の項で例示したものと同じ成分を使用することができる。増粘剤の配合量は、特に制限されないが、耐火性骨材100質量部(又は耐火性骨材とセメントの合計100質量部)に対して、例えば、0.001〜1質量部であり、好ましくは0.01〜0.5質量部である。
The amorphous refractory may further contain an additive. Examples of the additive include a dispersant, an explosion preventing agent, a thickener, and a combination thereof.
As the dispersant, the same components as those exemplified in the section “Cement composition” can be used. The blending amount of the dispersant is not particularly limited, but is, for example, 0.001 to 1 part by mass with respect to 100 parts by mass of the refractory aggregate (or a total of 100 parts by mass of the refractory aggregate and cement), 0.01 to 0.5 parts by mass.
As the explosion preventing agent, the same components as those exemplified in the section “Cement composition” can be used. The blending amount of the explosion preventing agent is not particularly limited, but is, for example, 0.001 to 1 part by mass with respect to 100 parts by mass of the refractory aggregate (or 100 parts by mass of the refractory aggregate and cement), Preferably it is 0.01-0.5 mass part.
As the thickener, the same components as those exemplified in the section “Cement composition” can be used. The blending amount of the thickener is not particularly limited, but is, for example, 0.001 to 1 part by mass with respect to 100 parts by mass of the refractory aggregate (or 100 parts by mass of the refractory aggregate and cement), Preferably it is 0.01-0.5 mass part.
不定形耐火物は、通常、水により硬化する性質(水硬性)を有する。不定形耐火物に水を添加して硬化する場合、水の添加量は、不定形耐火物100質量部に対して、例えば、1〜15質量部、好ましくは5〜10質量部である。
なお、不定形耐火物には、水(自由水)を含有させないことが好ましいが、水和停止剤(例:キレート剤、縮合リン酸塩、リン酸アルミニウム、硼酸)と共に水(自由水)を含有させることもできる。
硬化温度は、特に制限されないが、例えば、5〜40℃の範囲から選択することができる。本発明では、硬化温度が低温(例:5〜15℃)であっても、短時間(例:1〜3時間)で硬化することができる。
The amorphous refractory usually has the property of being cured by water (hydraulic). When adding and hardening water to an amorphous refractory, the addition amount of water is 1-15 mass parts with respect to 100 mass parts of amorphous refractories, Preferably it is 5-10 mass parts.
In addition, it is preferable that the amorphous refractory does not contain water (free water), but water (free water) is added together with a hydration terminator (eg, chelating agent, condensed phosphate, aluminum phosphate, boric acid). It can also be contained.
The curing temperature is not particularly limited, but can be selected from a range of 5 to 40 ° C., for example. In the present invention, even if the curing temperature is low (eg, 5 to 15 ° C.), it can be cured in a short time (eg, 1 to 3 hours).
不定形耐火物は、例えば、流し込み材、コテ塗り材、吹付け材等の形態で使用される。また、不定形耐火物の硬化物は、例えば、各種の熱源で機能する溶解炉、保持炉、取鍋、樋等のライニングとして使用することができる。 The amorphous refractory is used in the form of, for example, a casting material, a trowel coating material, or a spraying material. Moreover, the hardened | cured material of an amorphous refractory can be used as linings, such as a melting furnace, a holding furnace, a ladle, and a bowl, which function with various heat sources.
以下、実施例を参照して本発明をより詳細に説明するが、本発明はこれらに限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated in detail with reference to an Example, this invention is not limited to these.
添加水以外の各原料を表1に示す割合で10L容量のV型ミキサーに入れて混合することにより、不定形耐火物を調製した。
10℃の恒温器に、不定形耐火物と添加水を別々に24時間静置した。静置後の不定形耐火物に添加水を加え、10L容量の実験用羽付ミキサーで混練した。
混練後にフロー値を測定し、測定後に混練物をビニール袋に入れて、10℃の恒温器に静置し硬化するまで1時間おきに、フロー値の測定を継続した。なお、フロー値の測定はJIS−R2521に準じて実施した。
The amorphous refractory and the added water were allowed to stand separately in a thermostat at 10 ° C. for 24 hours. Added water was added to the amorphous refractory after standing, and the mixture was kneaded with a 10 L capacity wing mixer for experiments.
After kneading, the flow value was measured, and after the measurement, the kneaded product was put in a plastic bag, and kept in a 10 ° C. incubator, and the flow value was measured every 1 hour until cured. The flow value was measured according to JIS-R2521.
実験結果を表2に示す。
従来例及び実施例は、混練直後からのフロー値の変化が概ね同じであり、同じ時間で硬化している。
比較例1は硬化促進剤を添加していないため10時間後も硬化していない。比較例2は、金属水酸化物という点で水酸化ストロンチウムと共通する水酸化マグネシウムを添加しているが、比較例1と同様に10時間後も硬化していない。比較例3では、水酸化カルシウムを添加しているが、流動性(作業性)を阻害していることが分かる。
In the conventional example and the example, the change in the flow value immediately after the kneading is almost the same, and is cured in the same time.
Since Comparative Example 1 did not add a curing accelerator, it was not cured even after 10 hours. In Comparative Example 2, magnesium hydroxide which is common to strontium hydroxide in terms of metal hydroxide is added, but it is not cured after 10 hours as in Comparative Example 1. In the comparative example 3, although calcium hydroxide is added, it turns out that fluidity | liquidity (workability | operativity) is inhibited.
以上から明らかなように、水酸化ストロンチウムは、他の金属水酸化物とは異なり、アルミン酸ソーダと同様の硬化挙動を示す。非劇物である水酸化ストロンチウムは、劇物指定されたアルミン酸ソーダの代替物質として使用することができ、冬季などの低温下でも適度な作業時間により不定形耐火物を硬化することができる。 As is apparent from the above, strontium hydroxide exhibits the same curing behavior as sodium aluminate, unlike other metal hydroxides. Strontium hydroxide, which is a non- deleterious substance, can be used as a substitute for sodium aluminate, which is designated as a deleterious substance, and can cure an amorphous refractory with an appropriate working time even at low temperatures such as in winter.
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