CN117247272A - 一种抗氧化高炉铁沟浇注料及其制备方法 - Google Patents
一种抗氧化高炉铁沟浇注料及其制备方法 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 102
- 238000002360 preparation method Methods 0.000 title abstract description 26
- 239000003963 antioxidant agent Substances 0.000 title description 12
- 230000003078 antioxidant effect Effects 0.000 title description 12
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 91
- 239000010431 corundum Substances 0.000 claims abstract description 91
- 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 64
- 239000006229 carbon black Substances 0.000 claims abstract description 44
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 41
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- XIJLBSWGPVLQBE-UHFFFAOYSA-N [Sr].[Mo] Chemical compound [Sr].[Mo] XIJLBSWGPVLQBE-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052849 andalusite Inorganic materials 0.000 claims abstract description 30
- 230000003064 anti-oxidating effect Effects 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 27
- 239000010426 asphalt Substances 0.000 claims abstract description 23
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 22
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 22
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 26
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 claims description 21
- 150000001875 compounds Chemical class 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 18
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 20
- 230000003647 oxidation Effects 0.000 abstract description 18
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 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 2
- 238000001035 drying Methods 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- -1 trimethylaluminum modified carbon Chemical class 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
本发明公开了一种抗氧化高炉铁沟浇注料及其制备方法,涉及耐火材料技术领域,其原料组份质量百分比为:15‑8mm的棕刚玉为10.5~12%,8‑5mm的棕刚玉为14.5~16%,5‑3mm的棕刚玉为10~12%,3‑1mm的棕刚玉为10~11%,3‑1mm的致密刚玉为9~10%,1‑0mm的致密刚玉为4~5%,1‑0mm的碳化硅为11~13%,325目的碳化硅为9~10%,氧化铝微粉为4~6%,硅微粉为1.5~2.5%,高铝水泥为1~1.5%,ρ‑Al2O3为1~1.5%,红柱石为0.5~1%,球状沥青为2~2.5%,炭黑为0.5~1%,碳化硼为0.2~0.4%,钼锶粉为0.05~0.1%,金属硅粉为1.5~2.5%,金属铝粉为0.02~0.04%,有机纤维为0.04~0.07%,减水剂为0.1~0.3%。本发明具有优异的抗氧化性能,能够明显提高铁沟浇注料的使用性能和服役寿命,降低铁沟维修工作强度。
Description
技术领域
本发明属于耐火材料技术领域,具体涉及一种抗氧化高炉铁沟浇注料及其制备方法。
背景技术
炼铁高炉铁水沟是高炉平台关键设施,用于铁水与漂浮于铁水上部的液态高炉渣二者分离,并使铁水和高炉渣流向不同下游工序的重要通道,高炉铁水沟浇注料的使用寿命直接决定着高炉能够安全稳定生产,属于高炉稳定运行重点维护的部位之一。
目前高炉铁沟浇注料主要采用Al2O3-SiC-C体系,该浇注料体系具有良好的抗热震性能和抗渣性能,已成为高炉铁沟内衬层耐火材料的首选。但是Al2O3-SiC-C体系中含有大量的C,这些C在铁沟使用时处于高温条件下,从而很容易发生氧化而流失,进而导致铁沟浇注料抗热震性能、耐高温性能和抗氧化性能的急剧降低,大大降低了耐材的使用寿命。基于此,亟需一种新型的高炉铁沟浇注料以提高Al2O3-SiC-C体系浇注料的抗氧化性能。
发明内容
针对现有的铁沟浇注料抗热震性能、耐高温性能和抗氧化性能较弱的缺陷和问题,本发明提供一种抗氧化高炉铁沟浇注料及其制备方法。
本发明解决其技术问题所采用的方案是:一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,所述铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为10.5~12%,8-5mm的棕刚玉为14.5~16%,5-3mm的棕刚玉为10~12%,3-1mm的棕刚玉为10~11%,3-1mm的致密刚玉为9~10%,1-0mm的致密刚玉为4~5%,1-0mm的碳化硅为11~13%,325目的碳化硅为9~10%,氧化铝微粉为4~6%,硅微粉为1.5~2.5%,高铝水泥为1~1.5%,ρ-Al2O3为1~1.5%,红柱石为0.5~1%,球状沥青为2~2.5%,炭黑为0.5~1%,碳化硼为0.2~0.4%,钼锶粉为0.05~0.1%,金属硅粉为1.5~2.5%,金属铝粉为0.02~0.04%,有机纤维为0.04~0.07%,减水剂为0.1~0.3%。
进一步地,所述棕刚玉中Al2O3≥95%,SiO2≤1%,Fe2O3≤0.3%,TiO2≤3%,C≤0.1%,粉化率≤0.02%;致密刚玉中Al2O3≥99%,Fe2O3≤0.1%;碳化硅中SiC≥97%,SiO2≤0.4%,Fe2O3≤0.3%,游离碳≤0.5%;氧化铝微粉的粒度≤1µm;硅微粉中SiO2≥95%;高铝水泥中Al2O3≥80%;ρ-Al2O3中Al2O3≥92%;红柱石中Al2O3≥57%,粒度为325目;球状沥青中固定碳≥60%,灰分≤0.2%,挥发分≤40%,粒度为1-0.2mm;炭黑中固定碳≥95%,灰分≤0.5%,挥发分≤2.5%;碳化硼中B4C≥95%,SiO2≤0.1%,Fe2O3≤0.25%。
进一步地,所述钼锶粉由氧化钼和氧化锶组成,粒度均为500-800目,其中氧化钼和氧化锶的比例为7:3;金属硅粉的粒度为300-400目;金属铝粉的粒度为80-200目;减水剂为聚乙二醇基减水剂。
进一步地,所述炭黑表面经三甲基铝浸渍处理,三甲基铝修饰的位点与总碳边缘位点的比例≥60%。
进一步地,所述铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11%,8-5mm的棕刚玉为15.5%,5-3mm的棕刚玉为11%,3-1mm的棕刚玉为10.5%,3-1mm的致密刚玉为9.5%,1-0mm的致密刚玉为4.5%,1-0mm的碳化硅为12%,325目的碳化硅为9.5%,氧化铝微粉为5.5%,硅微粉为2%,高铝水泥为1.2%,ρ-Al2O3为1.3%,红柱石为0.8%,球状沥青为2.3%,炭黑为0.7%,碳化硼为0.3%,钼锶粉为0.07%,金属硅粉为2%,金属铝粉为0.03%,有机纤维为0.06%,减水剂为0.24%。
本发明还提供一种抗氧化高炉铁沟浇注料的制备方法,包括以下步骤:
S1、按照重量百分比分别称取325目的碳化硅、氧化铝微粉、硅微粉、高铝水泥、ρ-Al2O3、红柱石、炭黑、碳化硼、钼锶粉、金属硅粉、金属铝粉、有机纤维、减水剂,并依次加入容器中进行混合搅拌,搅拌时间为5-7min,得到配合混料;
S2、再按照重量百分比分别称取15-8mm的棕刚玉、8-5mm的棕刚玉、5-3mm的棕刚玉、3-1mm的棕刚玉、3-1mm的致密刚玉、1-0mm的致密刚玉、1-0mm的碳化硅、球状沥青,并依次加入另一容器中进行混合搅拌,搅拌时间为3-5min,得到配合粒料;
S3、一边搅拌上述配合粒料一边向该容器中连续、均匀添加配合混料,所述配合混料添加时间为3-5min,待添加完毕后再次将两者的混合料均匀搅拌3-5min之后即可得到高炉铁沟浇注料。
与现有技术相比,本发明的有益效果是:
本发明提供的抗氧化高炉铁沟浇注料及其制备方法,经过性能指标测试,具有较优的体积密度、抗折强度、耐压强度以及线变化率,具有优异的抗氧化性能,从而能够明显提高铁沟浇注料的使用性能和服役寿命,降低铁沟维修成本和员工工作强度。
通过引入钼锶粉提高铁沟浇注料的抗氧化性能,进而提高铁沟的使用寿命;通过加入红柱石,用以在铁沟浇注料在使用过程中,高温条件下产生富含SiO2的液相,在毛细力作用下渗入细小孔隙,堵塞孔道,阻止氧气与浇注料内部物料的反应。且富含SiO2的液相与浇注料中的Al2O3反应,生成莫来石,使得结构更加致密,并阻挡氧气向浇注料内部的渗入,提高浇注料的抗氧化性能。
实施方式
下面结合实施例对本发明进一步说明。
本发明提供了一种抗氧化高炉铁沟浇注料及其制备方法的技术方案,用于提高Al2O3-SiC-C体系浇注料的抗氧化性能。
实施例
本实施例提供一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11%,8-5mm的棕刚玉为15.5%,5-3mm的棕刚玉为11%,3-1mm的棕刚玉为10.5%,3-1mm的致密刚玉为9.5%,1-0mm的致密刚玉为4.5%,1-0mm的碳化硅为12%,325目的碳化硅为9.5%,氧化铝微粉为5.5%,硅微粉为2%,高铝水泥为1.2%,ρ-Al2O3为1.3%,红柱石为0.8%,球状沥青为2.3%,炭黑为0.7%,碳化硼为0.3%,钼锶粉为0.07%,金属硅粉为2%,金属铝粉为0.03%,有机纤维为0.06%,减水剂为0.24%。
上述的棕刚玉中Al2O3≥95%,SiO2≤1%,Fe2O3≤0.3%,TiO2≤3%,C≤0.1%,粉化率≤0.02%;致密刚玉中Al2O3≥99%,Fe2O3≤0.1%;碳化硅中SiC≥97%,SiO2≤0.4%,Fe2O3≤0.3%,游离碳≤0.5%;氧化铝微粉的粒度≤1µm;硅微粉中SiO2≥95%;高铝水泥中Al2O3≥80%;ρ-Al2O3中Al2O3≥92%;红柱石中Al2O3≥57%,粒度为325目;球状沥青中固定碳≥60%,灰分≤0.2%,挥发分≤40%,粒度为1-0.2mm;炭黑中固定碳≥95%,灰分≤0.5%,挥发分≤2.5%;碳化硼中B4C≥95%,SiO2≤0.1%,Fe2O3≤0.25%。
其中钼锶粉是由氧化钼和氧化锶组成,粒度均为800目,其中氧化钼和氧化锶的比例为7:3;上述金属硅粉的粒度为325目,金属铝粉的粒度为200目,减水剂采用的是聚乙二醇基减水剂。
本发明中为提高炭黑的抗氧化性能,采用三甲基铝对炭黑表面进行浸渍处理,处理后三甲基铝修饰的位点与总碳边缘位点的比例≥60%,具体包括以下过程:
①将炭黑加入反应器中,加入适量的正己烷、甲苯等,搅拌均匀;
②将炭黑重量4%的三甲基铝加入到反应器中,继续搅拌均匀;
③加热反应器,温度保持在100-110℃,搅拌反应3-4h,使三甲基铝与炭黑表面的羟基或羰基发生反应,形成化学键,将三甲基铝与炭黑紧密结合在一起;
④反应结束后,用溶剂洗涤,去除未反应的三甲基铝和其它杂质;
⑤将洗涤后的炭黑放置在通风干燥室中,使其干燥,去除残留的溶剂,得到三甲基铝修饰的炭黑。
经三甲基铝修饰的位点与总碳边缘位点的比例≥60%,经修饰的炭黑在高温条件下具有优异的抗氧化性能。
本发明通过加入钼锶粉来提高铁沟浇注料的抗氧化性能,氧化钼和氧化锶可与氧气反应,反应产物为高温条件下稳定态的氧化物,在浇注料的表面形成一层稳定的保护膜层,阻止氧气与浇注料中其他物料发生反应。同时,氧化钼和氧化锶可吸附在浇注料的表面,防止氧气与浇注料中的其他化学物质反应,通过这种物理反应可以提高浇注料的抗氧化性能,且在高温条件下具有良好的稳定性。
此外,本发明通过加入红柱石从而使铁沟浇注料在使用过程中,高温条件下能够产生富含SiO2的液相,在毛细力作用下渗入细小孔隙,堵塞孔道,阻止氧气与浇注料内部物料的反应。且富含SiO2的液相能够与浇注料中的Al2O3反应,生成莫来石,使得结构更加致密,并阻挡氧气向浇注料内部的渗入,提高浇注料的抗氧化性能。
基于上述的抗氧化高炉铁沟浇注料,本发明还提供一种抗氧化高炉铁沟浇注料的制备方法,具体包括以下步骤:
S1、按照上述重量百分比分别称取325目的碳化硅、氧化铝微粉、硅微粉、高铝水泥、ρ-Al2O3、红柱石、炭黑、碳化硼、钼锶粉、金属硅粉、金属铝粉、有机纤维、减水剂,并依次加入容器中进行混合搅拌,搅拌时间为7min,得到配合混料;
S2、再按照上述重量百分比分别称取15-8mm的棕刚玉、8-5mm的棕刚玉、5-3mm的棕刚玉、3-1mm的棕刚玉、3-1mm的致密刚玉、1-0mm的致密刚玉、1-0mm的碳化硅、球状沥青,并依次加入另一容器中进行混合搅拌,搅拌时间为3min,得到配合粒料;
S3、一边搅拌上述配合粒料一边向该容器中连续、均匀添加配合混料,所述配合混料添加时间为5min,待添加完毕后再次将两者的混合料均匀搅拌3min之后即可得到高炉铁沟浇注料。
本发明提供的抗氧化高炉铁沟浇注料及其制备方法,能够制备出具有优异抗氧化性能的铁沟浇注料,主要用于高炉出铁沟的主沟,通过本发明方法制备的铁沟浇注料能够明显提高铁沟浇注料的使用性能和服役寿命,并有效降低了铁沟维修成本和工作强度。
实施例
本实施例提供一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11.8%,8-5mm的棕刚玉为14.5%,5-3mm的棕刚玉为11.6%,3-1mm的棕刚玉为10.3%,3-1mm的致密刚玉为10%,1-0mm的致密刚玉为4.8%,1-0mm的碳化硅为12.5%,325目的碳化硅为10%,氧化铝微粉为4.6%,硅微粉为1.5%,高铝水泥为1.4%,ρ-Al2O3为1%,红柱石为0.6%,球状沥青为2.2%,炭黑为0.6%,碳化硼为0.36%,钼锶粉为0.05%,金属硅粉为1.8%,金属铝粉为0.04%,有机纤维为0.05%,减水剂为0.3%。
其中钼锶粉是由氧化钼和氧化锶组成,粒度均为800目,其中氧化钼和氧化锶的比例为7:3;上述金属硅粉的粒度为325目,金属铝粉的粒度为200目,减水剂采用的是聚乙二醇基减水剂。本实施例为提高炭黑的抗氧化性能,采用三甲基铝对炭黑表面进行浸渍处理,处理过程同实施例1,处理后三甲基铝修饰的位点与总碳边缘位点的比例≥60%。
上述的抗氧化高炉铁沟浇注料的制备方法,具体包括以下步骤:
S1、按照上述重量百分比分别称取325目的碳化硅、氧化铝微粉、硅微粉、高铝水泥、ρ-Al2O3、红柱石、炭黑、碳化硼、钼锶粉、金属硅粉、金属铝粉、有机纤维、减水剂,并依次加入容器中进行混合搅拌,搅拌时间为5min,得到配合混料;
S2、再按照上述重量百分比分别称取15-8mm的棕刚玉、8-5mm的棕刚玉、5-3mm的棕刚玉、3-1mm的棕刚玉、3-1mm的致密刚玉、1-0mm的致密刚玉、1-0mm的碳化硅、球状沥青,并依次加入另一容器中进行混合搅拌,搅拌时间为5min,得到配合粒料;
S3、一边搅拌上述配合粒料一边向该容器中连续、均匀添加配合混料,所述配合混料添加时间为3min,待添加完毕后再次将两者的混合料均匀搅拌3min之后即可得到高炉铁沟浇注料。
实施例
本实施例提供一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为12%,8-5mm的棕刚玉为14.7%,5-3mm的棕刚玉为12%,3-1mm的棕刚玉为10.2%,3-1mm的致密刚玉为9.2%,1-0mm的致密刚玉为4.2%,1-0mm的碳化硅为11%,325目的碳化硅为9.8%,氧化铝微粉为6%,硅微粉为1.7%,高铝水泥为1.3%,ρ-Al2O3为1.5%,红柱石为0.7%,球状沥青为2%,炭黑为0.7%,碳化硼为0.2%,钼锶粉为0.08%,金属硅粉为2.5%,金属铝粉为0.03%,有机纤维为0.04%,减水剂为0.15%。
其中钼锶粉是由氧化钼和氧化锶组成,粒度均为500目,其中氧化钼和氧化锶的比例为7:3;上述金属硅粉的粒度为300目,金属铝粉的粒度为100目,减水剂采用的是聚乙二醇基减水剂。
本实施例为提高炭黑的抗氧化性能,采用三甲基铝对炭黑表面进行浸渍处理,处理过程同实施例1,处理后三甲基铝修饰的位点与总碳边缘位点的比例≥60%;且本实施例中抗氧化高炉铁沟浇注料的制备方法采用上述重量比按照实施例1的步骤制备而成。
实施例
本实施例提供一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11.3%,8-5mm的棕刚玉为16%,5-3mm的棕刚玉为10.7%,3-1mm的棕刚玉为10%,3-1mm的致密刚玉为9%,1-0mm的致密刚玉为4.4%,1-0mm的碳化硅为12.3%,325目的碳化硅为9%,氧化铝微粉为5.4%,硅微粉为2.5%,高铝水泥为1.2%,ρ-Al2O3为1.4%,红柱石为1%,球状沥青为2.4%,炭黑为0.5%,碳化硼为0.37%,钼锶粉为0.1%,金属硅粉为2.1%,金属铝粉为0.02%,有机纤维为0.06%,减水剂为0.25%。
其中钼锶粉是由氧化钼和氧化锶组成,粒度均为500目,其中氧化钼和氧化锶的比例为7:3;上述金属硅粉的粒度为400目,金属铝粉的粒度为200目,减水剂采用的是聚乙二醇基减水剂。
本实施例为提高炭黑的抗氧化性能,采用三甲基铝对炭黑表面进行浸渍处理,处理过程同实施例1,处理后三甲基铝修饰的位点与总碳边缘位点的比例≥60%;且本实施例中抗氧化高炉铁沟浇注料的制备方法采用上述重量比按照实施例1的步骤制备而成。
实施例
本实施例提供一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为10.5%,8-5mm的棕刚玉为14.6%,5-3mm的棕刚玉为11.4%,3-1mm的棕刚玉为11%,3-1mm的致密刚玉为9.2%,1-0mm的致密刚玉为4%,1-0mm的碳化硅为12.7%,325目的碳化硅为9.4%,氧化铝微粉为5.8%,硅微粉为1.8%,高铝水泥为1%,ρ-Al2O3为1.3%,红柱石为0.8%,球状沥青为2.5%,炭黑为1%,碳化硼为0.26%,钼锶粉为0.07%,金属硅粉为2.3%,金属铝粉为0.03%,有机纤维为0.07%,减水剂为0.27%。
其中钼锶粉是由氧化钼和氧化锶组成,粒度均为800目,其中氧化钼和氧化锶的比例为7:3;上述金属硅粉的粒度为300目,金属铝粉的粒度为80目,减水剂采用的是聚乙二醇基减水剂。
本实施例为提高炭黑的抗氧化性能,采用三甲基铝对炭黑表面进行浸渍处理,处理过程同实施例1,处理后三甲基铝修饰的位点与总碳边缘位点的比例≥60%;且本实施例中抗氧化高炉铁沟浇注料的制备方法采用上述重量比按照实施例1的步骤制备而成。
实施例
本实施例提供一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11.6%,8-5mm的棕刚玉为15.8%,5-3mm的棕刚玉为10%,3-1mm的棕刚玉为10.6%,3-1mm的致密刚玉为9.4%,1-0mm的致密刚玉为5%,1-0mm的碳化硅为13%,325目的碳化硅为9.7%,氧化铝微粉为4%,硅微粉为2.4%,高铝水泥为1.5%,ρ-Al2O3为1.2%,红柱石为0.5%,球状沥青为2.3%,炭黑为0.85%,碳化硼为0.4%,钼锶粉为0.06%,金属硅粉为1.5%,金属铝粉为0.03%,有机纤维为0.06%,减水剂为0.1%。
其中钼锶粉是由氧化钼和氧化锶组成,粒度均为800目,其中氧化钼和氧化锶的比例为7:3;上述金属硅粉的粒度为400目,金属铝粉的粒度为80目,减水剂采用的是聚乙二醇基减水剂。
本实施例为提高炭黑的抗氧化性能,采用三甲基铝对炭黑表面进行浸渍处理,处理过程同实施例1,处理后三甲基铝修饰的位点与总碳边缘位点的比例≥60%;且本实施例中抗氧化高炉铁沟浇注料的制备方法采用上述重量比按照实施例1的步骤制备而成。
对比例1:
本对比例提供一种抗氧化高炉铁沟浇注料及其制备方法,其中铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11.5%,8-5mm的棕刚玉为15.5%,5-3mm的棕刚玉为11%,3-1mm的棕刚玉为10.5%,3-1mm的致密刚玉为9.5%,1-0mm的致密刚玉为4.5%,1-0mm的碳化硅为12%,325目的碳化硅为9.5%,氧化铝微粉为5.5%,硅微粉为2%,高铝水泥为1.2%,ρ-Al2O3为1.3%,红柱石为0.8%,球状沥青为2.3%,炭黑为0.2%,碳化硼为0.3%,钼锶粉为0.07%,金属硅粉为2%,金属铝粉为0.03%,有机纤维为0.06%,减水剂为0.24%。上述的抗氧化高炉铁沟浇注料的制备方法按照实施例1所述的制备方法。
对比例2:
本对比例提供一种抗氧化高炉铁沟浇注料及其制备方法,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11.8%,8-5mm的棕刚玉为15%,5-3mm的棕刚玉为11.6%,3-1mm的棕刚玉为10.3%,3-1mm的致密刚玉为10%,1-0mm的致密刚玉为4.8%,1-0mm的碳化硅为12.5%,325目的碳化硅为10%,氧化铝微粉为4.6%,硅微粉为1.5%,高铝水泥为1.4%,ρ-Al2O3为0.5%,红柱石为0.6%,球状沥青为2.2%,炭黑为0.6%,碳化硼为0.36%,钼锶粉为0.05%,金属硅粉为1.8%,金属铝粉为0.04%,有机纤维为0.05%,减水剂为0.3%。上述的抗氧化高炉铁沟浇注料的制备方法按照实施例1所述的制备方法。
对比例3:
本对比例提供一种抗氧化高炉铁沟浇注料及其制备方法,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为12%,8-5mm的棕刚玉为14.78%,5-3mm的棕刚玉为12%,3-1mm的棕刚玉为10.2%,3-1mm的致密刚玉为9.2%,1-0mm的致密刚玉为4.2%,1-0mm的碳化硅为11%,325目的碳化硅为9.8%,氧化铝微粉为6%,硅微粉为1.7%,高铝水泥为1.3%,ρ-Al2O3为1.5%,红柱石为0.7%,球状沥青为2%,炭黑为0.7%,碳化硼为0.2%,钼锶粉为0%,金属硅粉为2.5%,金属铝粉为0.03%,有机纤维为0.04%,减水剂为0.15%。上述的抗氧化高炉铁沟浇注料的制备方法按照实施例1所述的制备方法。本对比例中钼锶粉的含量占比为0。
对比例4:
本对比例提供一种抗氧化高炉铁沟浇注料及其制备方法,该铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11.3%,8-5mm的棕刚玉为16%,5-3mm的棕刚玉为10.72%,3-1mm的棕刚玉为10%,3-1mm的致密刚玉为9%,1-0mm的致密刚玉为4.4%,1-0mm的碳化硅为12.3%,325目的碳化硅为9%,氧化铝微粉为5.4%,硅微粉为2.5%,高铝水泥为1.2%,ρ-Al2O3为1.4%,红柱石为1%,球状沥青为2.4%,炭黑为0.5%,碳化硼为0.37%,钼锶粉为0.1%,金属硅粉为2.1%,金属铝粉为0%,有机纤维为0.06%,减水剂为0.25%。本对比例中金属铝粉的含量占比为0。
通过对上述实施例1-6以及对比例1-4不同配比制备而成的抗氧化高炉铁沟浇注料进行产品合格性能指标检测,其检测指标范围如下表所示:
表1 合格产品检测指标范围
检测结果如下表所示:
表2 实施例1-6和对比例1-4的性能指标检测结果
通过上表能够得到,按照本发明实施例1-6提供的抗氧化高炉铁沟浇注料各组分配比制备而成的抗氧化高炉铁沟浇注料,在不同高温煅烧下,无论是体积密度、抗折强度、耐压强度或是线变化率均满足测试范围要求,而依照对比例1-4中各组分占比配制而成的高炉铁沟浇注料,在经过110℃下煅烧时其抗折强度以及耐压强度相对较弱,待在1450℃高温煅烧下,无论是抗折强度、耐压强度以及线变化率均不满足指标测试范围要求,且其性能强度均较弱。
综上,本发明提供的抗氧化高炉铁沟浇注料及其制备方法,经过性能指标测试,具有较优的体积密度、抗折强度、耐压强度以及线变化率,具有优异的抗氧化性能,从而能够明显提高铁沟浇注料的使用性能和服役寿命。
以上所述仅为本发明的较佳实施例,并不限制本发明,凡在本发明的精神和原则范围内所做的任何修改、等同替换和改进,均应包含在本发明的保护范围之内。
Claims (6)
1.一种抗氧化高炉铁沟浇注料,用于高炉出铁沟的主沟,其特征在于:所述铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为10.5~12%,8-5mm的棕刚玉为14.5~16%,5-3mm的棕刚玉为10~12%,3-1mm的棕刚玉为10~11%,3-1mm的致密刚玉为9~10%,1-0mm的致密刚玉为4~5%,1-0mm的碳化硅为11~13%,325目的碳化硅为9~10%,氧化铝微粉为4~6%,硅微粉为1.5~2.5%,高铝水泥为1~1.5%,ρ-Al2O3为1~1.5%,红柱石为0.5~1%,球状沥青为2~2.5%,炭黑为0.5~1%,碳化硼为0.2~0.4%,钼锶粉为0.05~0.1%,金属硅粉为1.5~2.5%,金属铝粉为0.02~0.04%,有机纤维为0.04~0.07%,减水剂为0.1~0.3%。
2.根据权利要求1所述的抗氧化高炉铁沟浇注料,其特征在于:所述棕刚玉中Al2O3≥95%,SiO2≤1%,Fe2O3≤0.3%,TiO2≤3%,C≤0.1%,粉化率≤0.02%;致密刚玉中Al2O3≥99%,Fe2O3≤0.1%;碳化硅中SiC≥97%,SiO2≤0.4%,Fe2O3≤0.3%,游离碳≤0.5%;氧化铝微粉的粒度≤1µm;硅微粉中SiO2≥95%;高铝水泥中Al2O3≥80%;ρ-Al2O3中Al2O3≥92%;红柱石中Al2O3≥57%,粒度为325目;球状沥青中固定碳≥60%,灰分≤0.2%,挥发分≤40%,粒度为1-0.2mm;炭黑中固定碳≥95%,灰分≤0.5%,挥发分≤2.5%;碳化硼中B4C≥95%,SiO2≤0.1%,Fe2O3≤0.25%。
3.根据权利要求1所述的抗氧化高炉铁沟浇注料,其特征在于:所述钼锶粉由氧化钼和氧化锶组成,粒度均为500-800目,其中氧化钼和氧化锶的比例为7:3;金属硅粉的粒度为300-400目;金属铝粉的粒度为80-200目;减水剂为聚乙二醇基减水剂。
4.根据权利要求1所述的抗氧化高炉铁沟浇注料,其特征在于:所述炭黑表面经三甲基铝浸渍处理,三甲基铝修饰的位点与总碳边缘位点的比例≥60%。
5.根据权利要求1所述的抗氧化高炉铁沟浇注料,其特征在于:所述铁沟浇注料中各原料组份的质量百分比为:15-8mm的棕刚玉为11%,8-5mm的棕刚玉为15.5%,5-3mm的棕刚玉为11%,3-1mm的棕刚玉为10.5%,3-1mm的致密刚玉为9.5%,1-0mm的致密刚玉为4.5%,1-0mm的碳化硅为12%,325目的碳化硅为9.5%,氧化铝微粉为5.5%,硅微粉为2%,高铝水泥为1.2%,ρ-Al2O3为1.3%,红柱石为0.8%,球状沥青为2.3%,炭黑为0.7%,碳化硼为0.3%,钼锶粉为0.07%,金属硅粉为2%,金属铝粉为0.03%,有机纤维为0.06%,减水剂为0.24%。
6.一种如权利要求1-5任一项所述的抗氧化高炉铁沟浇注料的制备方法, 其特征在于:包括以下步骤:
S1、按照重量百分比分别称取325目的碳化硅、氧化铝微粉、硅微粉、高铝水泥、ρ-Al2O3、红柱石、炭黑、碳化硼、钼锶粉、金属硅粉、金属铝粉、有机纤维、减水剂,并依次加入容器中进行混合搅拌,搅拌时间为5-7min,得到配合混料;
S2、再按照重量百分比分别称取15-8mm的棕刚玉、8-5mm的棕刚玉、5-3mm的棕刚玉、3-1mm的棕刚玉、3-1mm的致密刚玉、1-0mm的致密刚玉、1-0mm的碳化硅、球状沥青,并依次加入另一容器中进行混合搅拌,搅拌时间为3-5min,得到配合粒料;
S3、一边搅拌上述配合粒料一边向该容器中连续、均匀添加配合混料,所述配合混料添加时间为3-5min,待添加完毕后再次将两者的混合料均匀搅拌3-5min之后即可得到高炉铁沟浇注料。
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