CN107857598B - 抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖及其制备方法 - Google Patents
抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖及其制备方法 Download PDFInfo
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- 229910052596 spinel Inorganic materials 0.000 title claims abstract description 75
- 239000011029 spinel Substances 0.000 title claims abstract description 75
- 239000011449 brick Substances 0.000 title claims abstract description 60
- 229910052582 BN Inorganic materials 0.000 title claims abstract description 53
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 239000011777 magnesium Substances 0.000 title claims abstract description 38
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 38
- -1 magnesium aluminate Chemical class 0.000 title claims abstract description 38
- 238000005260 corrosion Methods 0.000 title claims abstract description 33
- 230000007797 corrosion Effects 0.000 title claims abstract description 32
- 239000004568 cement Substances 0.000 title claims abstract description 24
- 230000007704 transition Effects 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 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 27
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 230000032683 aging Effects 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 150000003841 chloride salts Chemical class 0.000 claims abstract description 15
- 229910001510 metal chloride Inorganic materials 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000010451 perlite Substances 0.000 claims abstract description 12
- 235000019362 perlite Nutrition 0.000 claims abstract description 12
- 239000002893 slag Substances 0.000 claims abstract description 12
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 11
- 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 claims abstract description 11
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 11
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 11
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 10
- 238000010304 firing Methods 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920000858 Cyclodextrin Polymers 0.000 claims abstract description 9
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 9
- 229920005551 calcium lignosulfonate Polymers 0.000 claims abstract description 9
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims abstract description 9
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 claims abstract description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 71
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 229910021555 Chromium Chloride Inorganic materials 0.000 claims description 8
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 8
- 229910021550 Vanadium Chloride Inorganic materials 0.000 claims description 8
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 claims description 8
- GICWIDZXWJGTCI-UHFFFAOYSA-I molybdenum pentachloride Chemical compound Cl[Mo](Cl)(Cl)(Cl)Cl GICWIDZXWJGTCI-UHFFFAOYSA-I 0.000 claims description 8
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 8
- RPESBQCJGHJMTK-UHFFFAOYSA-I pentachlorovanadium Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[V+5] RPESBQCJGHJMTK-UHFFFAOYSA-I 0.000 claims description 8
- IEXRMSFAVATTJX-UHFFFAOYSA-N tetrachlorogermane Chemical compound Cl[Ge](Cl)(Cl)Cl IEXRMSFAVATTJX-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
本发明公开了一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖及其制备方法,该制备方法包括:1)在保护气的存在下,将镁铝尖晶石、氮化硼、珍珠岩、碳粉、金属氯盐进行煅烧以制得煅烧产物;2)将铝矾土、莫来石、铝矿渣、碳化硅、氧化铝、锆英砂、煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水进行混合、陈化以制得混合料;3)将混合料进行压制以制得砖坯;4)将砖坯进行干燥、烧制、冷却以制得抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖。该过渡带用氮化硼复合镁铝尖晶石砖具有优异的抗腐蚀性能。
Description
技术领域
本发明涉及氮化硼复合镁铝尖晶石砖,具体地,涉及一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖及其制备方法。
背景技术
水泥回转窑经历了漫长的演变和发展过程,目前水泥工业窑炉主要由窑口、下过渡带、烧成带、下过渡带和安全带组成;由于烧成带和过渡带的工作环境较为恶劣,故而需要在烧成带和过渡带的窑壁上设置耐火砖。理想中的耐火砖需要具有以下特点:1)优异的挂窑皮性能;2)高抗热化学反应能力;3)优异的抗渣能力;4)优异的机械强度;5)优异的热震稳定性。
但是现有的水泥回转窑中往往对有各种产业废弃物的资源再利用和低品位原燃料的使用,使水泥窑炉成为工业垃圾的消费者,由于这些废弃物的燃烧使水泥窑中的碱、氯、硫循环量增大,对耐火材料的侵蚀会加剧,结皮问题更加严重。
发明内容
本发明的目的是提供一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖及其制备方法,该过渡带用氮化硼复合镁铝尖晶石砖具有优异的抗腐蚀性能,同时该制备方法具有工序简单和原料易得的优点。
为了实现上述目的,本发明提供了一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖的制备方法,该制备方法包括:
1)在保护气的存在下,将镁铝尖晶石、氮化硼、珍珠岩、碳粉、金属氯盐进行煅烧以制得煅烧产物;
2)将铝矾土、莫来石、铝矿渣、碳化硅、氧化铝、锆英砂、煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水进行混合、陈化以制得混合料;
3)将混合料进行压制以制得砖坯;
4)将砖坯进行干燥、烧制、冷却以制得抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖;
其中,镁铝尖晶石由平均粒径为0.12-0.18mm的尖晶石颗粒A、平均粒径为0.32-0.45mm的尖晶石颗粒B和平均粒径为1.6-2.0mm的尖晶石颗粒C按照10:10-15:3-5的重量比组成;所述金属氯盐由氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗组成。
本发明还提供了一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖,该抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖通过上的制备方法制备而得。
在上述技术方案,本发明通过各原料和各工序的有机结合使得制得的氮化硼复合镁铝尖晶石砖具有优异的抗腐蚀,同时该制备方法具有工序简单和原料易得的优点。
本发明的其他特征和优点将在随后的具体实施方式部分予以详细说明。
具体实施方式
以下对本发明的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。
本发明提供了一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖的制备方法,该制备方法包括:
1)在保护气的存在下,将镁铝尖晶石、氮化硼、珍珠岩、碳粉、金属氯盐进行煅烧以制得煅烧产物;
2)将铝矾土、莫来石、铝矿渣、碳化硅、氧化铝、锆英砂、煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水进行混合、陈化以制得混合料;
3)将混合料进行压制以制得砖坯;
4)将砖坯进行干燥、烧制、冷却以制得抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖;
其中,镁铝尖晶石由平均粒径为0.12-0.18mm的尖晶石颗粒A、平均粒径为0.32-0.45mm的尖晶石颗粒B和平均粒径为1.6-2.0mm的尖晶石颗粒C按照10:10-15:3-5的重量比组成;所述金属氯盐由氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗组成。
在本发明的步骤1)中,各物料的粒径可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤1)中,氮化硼的平均粒径为0.11-0.16mm,珍珠岩的平均粒径为0.10-0.25mm。
在本发明的步骤1)中,各物料的用量可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,所述镁铝尖晶石、氮化硼、珍珠岩、碳粉、金属氯盐的重量比为10:1-1.5:2-7:2.5-3.5:0.8-1.5。
其中,在在所述金属氯盐中,各组分的配比可以在宽的范围内选择,但是为了使制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在金属氯盐中,所述氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗的重量比为5:2-5:1-3:0.8-1.6:0.5-1。
在本发明的步骤1)中,煅烧的具体条件可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤1)中,所述煅烧为:先将物料自15-35℃以0.8-1.5℃/min升温至150-200℃并保温1-2h,接着以0.4-0.9℃/min升温至480-520℃并保温3-5h,最后以1-1.5℃/min降温至300-360℃并保温1-2h。
在本发明的步骤2)中,各物料的用量可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤2)中,铝矾土、莫来石、铝矿渣、碳化硅、氧化铝、锆英砂、煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水的重量比为10:6-9:2-4:1-1.6:2-2.4:3-4.5:6-9:2-4:1-3:3.5-4.5:30-50。
在本发明的步骤2)中,混合的条件可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤2)中,混合满足以下条件:混合温度为30-40℃,混合时间为40-60min。
在本发明的步骤2)中,陈化的条件可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤2)中,陈化满足以下条件:陈化温度为45-60℃,陈化时间为10-20h。
在本发明的步骤2)中,各物料的粒径可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤2)中,铝矾土、莫来石、铝矿渣的平均粒径各自独立地为1.1-1.5mm,碳化硅、氧化铝、锆英砂的平均粒径各自独立地为2.5-3mm。
在本发明的步骤3)中,压制的条件可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤3)中,压制的过程为:先将混合料于20-25MPa下压制20-30min,接着于40-60MPa下压制40-60min,最后于10-15MPa下压制10-15min。
在本发明的步骤3)中,干燥的条件可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤4)中,干燥满足以下条件:干燥温度为125-140℃,干燥时间为30-40h。
在本发明的步骤4)中,烧制的条件可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,在步骤4)中,烧制为:先自15-35℃以0.5-1℃/min升温至250-320℃并保温1-2h,接着以2.5-3℃/min升温至800-960℃并保温3-5h,最后以1-1.5℃/min升温至1760-1780℃并保温1-2h。
在本发明的步骤4)中,冷却的方式可以在宽的范围内选择,但是为了使得制得的氮化硼复合镁铝尖晶石砖具有更优异的抗腐蚀,优选地,冷却采用自然冷却的方式进行。
本发明还提供了一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖,该抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖通过上的制备方法制备而得。
以下将通过实施例对本发明进行详细描述。
实施例1
1)在氩气的保护下,将镁铝尖晶石、氮化硼(平均粒径为0.14mm)和珍珠岩(的平均粒径为0.15mm)、碳粉、金属氯盐(由氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗按照5:3:2:1:0.8的重量比组成)按照10:1.3:5:3:1.2的重量比进行煅烧(先将物料自25℃以1℃/min升温至180℃并保温1.5h,接着以0.7℃/min升温至500℃并保温4h,最后以1.3℃/min降温至340℃并保温1.5h)以制得煅烧产物;
2)将铝矾土(平均粒径为1..4mm)、莫来石(平均粒径为1.3mm)、铝矿渣(平均粒径为1.2mm)、碳化硅(平均粒径为2.8mm)、氧化铝(平均粒径为2.7mm)、锆英砂(平均粒径为2.6mm)、所述煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水按照10:8:3:1.3:2.2:3.5:7:3:2:4:40的重量比进行混合(混合温度为35℃,混合时间为50min)、陈化(陈化温度为50℃,陈化时间为15h)以制得混合料;
3)将所述混合料先于22MPa下压制25min,接着于50MPa下压制50min,最后于13MPa下压制12min进行压制以制得砖坯;
4)将所述砖坯进行干燥(干燥温度为130℃,干燥时间为35h)、烧制;接着将干燥后的砖坯先自25℃以0.8℃/min升温至300℃并保温1.5h,再以2.8℃/min升温至860℃并保温4h,然后以1.3℃/min升温至1770℃并保温1.5h;最后冷却采用以制得所述抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖A1;
其中,所述镁铝尖晶石由平均粒径为0.15mm的尖晶石颗粒A、平均粒径为0.38mm的尖晶石颗粒B和平均粒径为1.8mm的尖晶石颗粒C按照10:13:4的重量比组成。
实施例2
1)在氩气的保护下,将镁铝尖晶石、氮化硼(平均粒径为0.11mm)和珍珠岩(的平均粒径为0.10mm)、碳粉、金属氯盐(由氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗按照5:2:1:0.8:0.5的重量比组成)按照10:1:2:2.5:0.8的重量比进行煅烧(先将物料自15℃以0.8℃/min升温至150℃并保温1h,接着以0.4℃/min升温至480℃并保温3h,最后以1℃/min降温至300℃并保温1h)以制得煅烧产物;
2)将铝矾土(平均粒径为1.1mm)、莫来石(平均粒径为1.1mm)、铝矿渣(平均粒径为1.1mm)、碳化硅(平均粒径为2.5mm)、氧化铝(平均粒径为2.5mm)、锆英砂(平均粒径为2.5mm)、所述煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水按照10:6:2:1:2:3:6:2:1:3.5:30的重量比进行混合(混合温度为30℃,混合时间为40min)、陈化(陈化温度为45℃,陈化时间为10h)以制得混合料;
3)将所述混合料先于20MPa下压制20min,接着于40MPa下压制40min,最后于10MPa下压制10min进行压制以制得砖坯;
4)将所述砖坯进行干燥(干燥温度为125℃,干燥时间为30h)、烧制;接着将干燥后的砖坯先自15℃以0.5℃/min升温至250℃并保温1h,再以2.5℃/min升温至800℃并保温3h,然后以1℃/min升温至1760℃并保温1h;最后冷却采用以制得所述抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖A2;
其中,所述镁铝尖晶石由平均粒径为0.12mm的尖晶石颗粒A、平均粒径为0.32mm的尖晶石颗粒B和平均粒径为1.6mm的尖晶石颗粒C按照10:10:3的重量比组成。
实施例3
1)在氩气的保护下,将镁铝尖晶石、氮化硼(平均粒径为0.16mm)和珍珠岩(的平均粒径为0.25mm)、碳粉、金属氯盐(由氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗按照5:5:3:1.6:1的重量比组成)按照10:1.5:7:3.5:1.5的重量比进行煅烧(先将物料自35℃以1.5℃/min升温至200℃并保温2h,接着以0.9℃/min升温至520℃并保温5h,最后以1.5℃/min降温至360℃并保温2h)以制得煅烧产物;
2)将铝矾土(平均粒径为1.5mm)、莫来石(平均粒径为1.5mm)、铝矿渣(平均粒径为1.5mm)、碳化硅(平均粒径为3mm)、氧化铝(平均粒径为3mm)、锆英砂(平均粒径为3mm)、所述煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水按照10:9:4:1.6:2.4:4.5:9:4:3:4.5:50的重量比进行混合(混合温度为40℃,混合时间为60min)、陈化(陈化温度为60℃,陈化时间为20h)以制得混合料;
3)将所述混合料先于25MPa下压制30min,接着于60MPa下压制60min,最后于15MPa下压制15min进行压制以制得砖坯;
4)将所述砖坯进行干燥(干燥温度为140℃,干燥时间为40h)、烧制;接着将干燥后的砖坯先自35℃以1℃/min升温至320℃并保温2h,再以3℃/min升温至960℃并保温5h,然后以1.5℃/min升温至1780℃并保温2h;最后冷却采用以制得所述抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖A3;
其中,所述镁铝尖晶石由平均粒径为0.18mm的尖晶石颗粒A、平均粒径为0.45mm的尖晶石颗粒B和平均粒径为2.0mm的尖晶石颗粒C按照10:15:5的重量比组成。
对比例1
按照实施例1的方法进行制得氮化硼复合镁铝尖晶石砖B1,不同的是,步骤1)未进行煅烧工序。
对比例2
按照实施例1的方法进行制得氮化硼复合镁铝尖晶石砖B2,不同的是,步骤1)未使用镁铝尖晶石。
对比例3
按照实施例1的方法进行制得氮化硼复合镁铝尖晶石砖B3,不同的是,步骤1)未使用氮化硼。
对比例4
按照实施例1的方法进行制得氮化硼复合镁铝尖晶石砖B4,不同的是,步骤1)未使用珍珠岩。
检测例1
在上述氮化硼复合镁铝尖晶石砖的中部开口径为5cm的盲孔,接着填充水泥熟料和碳酸钾颗粒,再将氮化硼复合镁铝尖晶石砖于1200℃下热处理5h,最后将氮化硼复合镁铝尖晶石砖切开并统计氮化硼复合镁铝尖晶石砖中的侵蚀深度,具体结果见表1。
表1
以上详细描述了本发明的优选实施方式,但是,本发明并不限于上述实施方式中的具体细节,在本发明的技术构思范围内,可以对本发明的技术方案进行多种简单变型,这些简单变型均属于本发明的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本发明对各种可能的组合方式不再另行说明。
此外,本发明的各种不同的实施方式之间也可以进行任意组合,只要其不违背本发明的思想,其同样应当视为本发明所公开的内容。
Claims (11)
1.一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖的制备方法,其特征在于,所述制备方法包括:
1)在保护气的存在下,将镁铝尖晶石、氮化硼、珍珠岩、碳粉、金属氯盐进行煅烧以制得煅烧产物;
2)将铝矾土、莫来石、铝矿渣、碳化硅、氧化铝、锆英砂、所述煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水进行混合、陈化以制得混合料;
3)将所述混合料进行压制以制得砖坯;
4)将所述砖坯进行干燥、烧制、冷却以制得所述抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖;
其中,所述镁铝尖晶石由平均粒径为0.12-0.18mm的尖晶石颗粒A、平均粒径为0.32-0.45mm的尖晶石颗粒B和平均粒径为1.6-2.0mm的尖晶石颗粒C按照10:10-15:3-5的重量比组成;所述金属氯盐由氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗组成;在步骤1)中,所述镁铝尖晶石、氮化硼、珍珠岩、碳粉、金属氯盐的重量比为10:1-1.5:2-7:2.5-3.5:0.8-1.5;在所述金属氯盐中,所述氯化镍、氯化铬、五氯化钼、氯化钒和氯化锗的重量比为5:2-5:1-3:0.8-1.6:0.5-1;在步骤2)中,所述铝矾土、莫来石、铝矿渣、碳化硅、氧化铝、锆英砂、所述煅烧产物、木质素磺酸钙、硅酸钠、环糊精和水的重量比为10:6-9:2-4:1-1.6:2-2.4:3-4.5:6-9:2-4:1-3:3.5-4.5:30-50。
2.根据权利要求1所述的制备方法,其中,所述氮化硼的平均粒径为0.11-0.16mm,所述珍珠岩的平均粒径为0.10-0.25mm。
3.根据权利要求1所述的制备方法,其中,在步骤1)中,所述煅烧为:先将物料自15-35℃以0.8-1.5℃/min升温至150-200℃并保温1-2h,接着以0.4-0.9℃/min升温至480-520℃并保温3-5h,最后以1-1.5℃/min降温至300-360℃并保温1-2h。
4.根据权利要求1所述的制备方法,其中,在步骤2)中,所述混合满足以下条件:混合温度为30-40℃,混合时间为40-60min。
5.根据权利要求1所述的制备方法,其中,在步骤2)中,所述陈化满足以下条件:陈化温度为45-60℃,陈化时间为10-20h。
6.根据权利要求1所述的制备方法,其中,在步骤2)中,所述铝矾土、莫来石、铝矿渣的平均粒径各自独立地为1.1-1.5mm,所述碳化硅、氧化铝、锆英砂的平均粒径各自独立地为2.5-3mm。
7.根据权利要求1-6中任意一项所述的制备方法,其中,在步骤3)中,所述压制的过程为:先将所述混合料于20-25MPa下压制20-30min,接着于40-60MPa下压制40-60min,最后于10-15MPa下压制10-15min。
8.根据权利要求7所述的制备方法,其中,在步骤4)中,所述干燥满足以下条件:干燥温度为125-140℃,干燥时间为30-40h。
9.根据权利要求7所述的制备方法,其中,在步骤4)中,所述烧制为:先自15-35℃以0.5-1℃/min升温至250-320℃并保温1-2h,接着以2.5-3℃/min升温至800-960℃并保温3-5h,最后以1-1.5℃/min升温至1760-1780℃并保温1-2h。
10.根据权利要求1所述的制备方法,其中,所述冷却采用自然冷却的方式进行。
11.一种抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖,其特征在于,所述抗腐蚀水泥窑过渡带用氮化硼复合镁铝尖晶石砖通过权利要求1-10中任意一项所述的制备方法制备而得。
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