CN104291844B - 一种长寿的高炉用铁口泥套的制备方法 - Google Patents
一种长寿的高炉用铁口泥套的制备方法 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 236
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 119
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000009413 insulation Methods 0.000 claims description 35
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 34
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 30
- 239000010431 corundum Substances 0.000 claims description 28
- 229910052593 corundum Inorganic materials 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 27
- 239000011449 brick Substances 0.000 claims description 26
- 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 description 26
- 229910052863 mullite Inorganic materials 0.000 claims description 26
- 239000002893 slag Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000000395 magnesium oxide Substances 0.000 claims description 17
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 17
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 17
- 229910052759 nickel Inorganic materials 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 15
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 14
- 239000003595 mist Substances 0.000 claims description 14
- 235000010413 sodium alginate Nutrition 0.000 claims description 14
- 229940005550 sodium alginate Drugs 0.000 claims description 14
- 239000000661 sodium alginate Substances 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000004113 Sepiolite Substances 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 9
- 229910052624 sepiolite Inorganic materials 0.000 claims description 9
- 235000019355 sepiolite Nutrition 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 7
- 239000011295 pitch Substances 0.000 claims description 7
- 230000002977 hyperthermial effect Effects 0.000 claims description 5
- 230000003245 working effect Effects 0.000 abstract description 14
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- 238000010791 quenching Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
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- 239000000126 substance Substances 0.000 description 3
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- 239000007767 bonding agent Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 150000002505 iron Chemical class 0.000 description 2
- 239000011021 lapis lazuli Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 235000021180 meal component Nutrition 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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Abstract
本发明公开了一种长寿的高炉用铁口泥套的制备方法,属于炼铁高炉铁口配件技术领域。本发明的一种长寿的高炉用铁口泥套的制备方法,其制备方法如下:步骤一:制备铁口泥套浇注料:(1)制备混合物A;(2)制备混合物B;(3)制备浇注料;步骤二:制备铁口泥套:将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤即得铁口泥套。本发明的铁口泥套通过创造性的组分配比,从而大大提高了高炉铁口泥套的使用寿命,减少炉前事故发生率,降低了炉前的劳动强度,较好地保证了高炉炉况稳定和顺行。
Description
技术领域
本发明涉及炼铁高炉铁口配件技术领域,更具体地说,涉及一种长寿的高炉用铁口泥套的制备方法。
背景技术
冶金行业高炉炼铁铁口泥套是高炉出铁时的重要通道,铁口泥套的服役环境极为恶劣,铁口泥套在使用过程中承受着受急冷急热的热震侵蚀、化学侵蚀、高温铁水的机械冲刷。特别是随着高炉冶炼强度的不断提高,出铁速度加快,出铁温度提高,铁口承受的压力加大,铁口成了高炉的薄弱环节,铁口工作稳定与否成了高炉高产稳产的关键因素。
传统的铁口泥套是采用棕刚玉、碳化硅、和焦粉为主原料,用软质粘土、绢云母为结合剂制成,由于成分不合理,使得现有的铁口泥套极易产生裂纹或崩裂,修补频率高,铁口泥套使用寿命短,不仅消耗耐火材料多,耗用时间长,而且严重影响高炉的渣铁处理,进而影响高炉的稳定顺行;此外,由于铁口泥套使用寿命短,大大增加炉前操作人员的劳动强度,泄漏的煤气还威胁操作人员的生命安全,埋下安全隐患。亟需开发出一种长寿、耐用的高炉用铁口泥套,从而减少炉前事故发生率,为高炉顺行提供保障。
经专利检索,已有相关的技术方案公开。如:环保型高强铁口树脂套泥及铁口泥套的制备方法(专利号:ZL200710010189.2,授权公告日:2010-03-24),该铁口套泥是以热固型酚醛树脂树脂为粘合剂,以刚玉颗粒为骨料,以刚玉粉、粘土粉、石墨粉、三氧化二铝超微粉为粉料组成;制备铁口泥套预制成型:按原料的重量组分取刚玉颗粒加入50%量的热固型酚醛树脂粘合剂进行搅拌,然后再加入刚玉粉、粘土粉、石墨粉、三氧化二铝超微粉和另外50%量的热固型酚醛树脂进行搅拌,充分搅拌后出料装模,振动成型,封装:成型后用塑料薄膜风装,便于现场使用、长途运输、长期保存。该申请案提高了铁口泥套的产品质量,同时缩短了制作时间,但是,该铁口泥套的使用寿命有待进一步提高,难以为高炉顺行提供保障。
发明内容
1.发明要解决的技术问题
本发明的目的在于克服现有技术中高炉铁口泥套使用寿命短,修补、更换频率大的不足,提供了一种长寿的高炉用铁口泥套的制备方法,本发明的铁口泥套通过创造性的原料组分配比,设计出了的铁口泥套具有良好的抗冲刷、抗侵蚀、耐高温强性能,大大提高了高炉铁口泥套的使用寿命,保证了高炉的正常生产秩序,而且制造简易方便。
2.技术方案
为达到上述目的,本发明提供的技术方案为:
本发明的一种长寿的高炉用铁口泥套的制备方法,其特征在于:其制备方法如下:
步骤一:制备铁口泥套浇注料
(1)制备混合物A:将刚玉砖、莫来石、镁质红土镍矿、碳化硅等组分混合,混合均匀制备得混合物A;
(2)制备混合物B:将杨迪粉、沥青、海藻酸钠、结合剂等组分依次加入到步骤(1)制备得到的混合物A中,混合均匀制备得混合物B;
(3)制备浇注料:将添加剂加入到步骤(2)制备得到的混合物B中,混合均匀制备得铁口泥套浇注料;
步骤二:制备铁口泥套
将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤即得铁口泥套。
更进一步地,步骤一中混合物A的制备方法为:按质量份数称取刚玉砖80-90份,莫来石50-60份,镁质红土镍矿10-15份,碳化硅20-30份和转炉风淬渣5-8份,依次加入到搅拌机中,并搅拌40min,搅拌机转速为250r/min,混合均匀后制得混合物A。
更进一步地,步骤一中混合物B的制备方法为:按质量份数称取杨迪粉1-2份,沥青4-10份和海藻酸钠0.5份,依次加入到步骤(1)制备得到的混合物A中,搅拌机继续混合搅拌30min,混合均匀制备得混合物B。
更进一步地,步骤一中浇注料的制备方法为:按质量份数称取添加剂2-5份加入到步骤(2)制备得到的混合物B中,搅拌机继续混合搅拌25min,混合均匀制备得铁口泥套浇注料。
更进一步地,步骤二的铁口泥套的制备方法为:将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤,其中烘烤方法为:
(1)升温处理
首先,升温到150℃,保温4h;
其二,升温到500℃,保温2h;
其三,升温到850℃,保温6h;
最后,升温到1450℃,保温8h;
(2)降温处理
首先,降温到1100℃,保温5h;
其二,降温到650℃,保温3h;
其三,降温到400℃,保温4h;
最后,空冷至常温,即制备得铁口泥套。
更进一步地,所述的刚玉砖的粒度按如下质量百分含量组成:粒度≤0.074mm:25%,0.074-0.5mm:20%,0.5-1.0mm:35%;1.0-3.0mm:20%;所述的莫来石的粒度按如下质量百分含量组成:粒度≤0.074mm:20%,0.074-0.5mm:30%,0.5-1.0mm:25%;1.0-3.0mm:25%。
3.有益效果
采用本发明提供的技术方案,与已有的公知技术相比,具有如下显著效果:
本发明的一种长寿的高炉用铁口泥套的制备方法,铁口泥套采用刚玉砖、莫来石、镁质红土镍矿、碳化硅、转炉风淬渣、杨迪粉、沥青、海藻酸钠等创造性的组分配比,使得铁口泥套具有良好的抗冲刷、抗侵蚀、耐高温强性能,其中沥青为球状沥青,利用较高的碳素含量提高了铁口泥套的抗侵蚀性能,且铁口泥套浇注料的空隙中残留较多的碳素,使得铁口泥套更加致密;
本发明的铁口泥套的刚玉砖和莫来石采用不同的粒度组成,使得耐火骨料的粒度组成更加合理,莫来石具有良好的抗热震性,刚玉砖使得其具有良好的耐侵蚀性能,而且在浇注料中合理的配入Al2O3微粉、石墨粉、SiO2微粉、硼矿粉、铜矿砂和海泡石使得铁口泥套具有高强度、高耐火度,从而大大提高了高炉铁口泥套的使用寿命,减少炉前事故发生率,降低了炉前的劳动强度,较好地保证了高炉炉况稳定和顺行。
具体实施方式
为进一步了解本发明的内容,下面结合实施例对本发明作进一步的描述。
实施例1
本实施例的一种长寿的高炉用铁口泥套,所述的铁口泥套各组分按如下质量份组成:刚玉砖90kg,莫来石60kg,镁质红土镍矿15kg,碳化硅30kg,转炉风淬渣8kg,杨迪粉2kg,沥青10kg,海藻酸钠0.5kg,添加剂5kg。
并在此进行说明,所述的刚玉砖的粒度按如下质量百分含量组成:粒度≤0.074mm:25%,0.074-0.5mm:20%,0.5-1.0mm:35%;1.0-3.0mm:20%;所述的莫来石的粒度按如下质量百分含量组成:粒度≤0.074mm:20%,0.074-0.5mm:30%,0.5-1.0mm:25%;1.0-3.0mm:25%。莫来石具有良好的抗热震性,刚玉砖使得其具有良好的耐侵蚀性能。
本实施例的镁质红土镍矿的粒度为1.0-3.0mm,上述所用的碳化硅的粒度≤0.074mm,碳化硅保证了该高炉铁口泥套的高温强度和抗腐蚀性能。此外,上述的转炉风淬渣是将转炉渣通过渣罐车运至风淬工位后,液态的转炉渣从渣罐车的中间罐流出,再通过拉瓦尔喷嘴喷出的空气吹散,破碎成颗粒状即为转炉风淬渣,该转炉风淬渣的成分的质量百分为:Al2O3:3.22%,CaO:44.85%,MgO:13.02%,MnO:0.73%,Si2O:14.58%,TFe:21.26%,f-CaO:0.45%,其余为不可避免的杂质。
上述的杨迪粉成分的质量百分含量为:TFe:57.89%,SiO2:5.38%,Al2O3:1.34%,CaO:0.14%,MgO:0.23%,其余为不可避免的杂质,该杨迪粉的粒度为2.0-3.5mm。本实施例所采用的沥青为球状沥青。
本实施例的添加剂按如下质量百分含量组成:Al2O3微粉:30%、石墨粉:25%、SiO2微粉:15%、硼矿粉:15%、铜矿砂:10%、海泡石:5%。浇注料中合理的配入Al2O3微粉、石墨粉、SiO2微粉、硼矿粉、铜矿砂和海泡石使得铁口泥套具有高强度、高耐火度,从而大大提高了高炉铁口泥套的使用寿命,减少炉前事故发生率。所述的铜矿砂是从铜矿中开采出来的,然后经过选矿成为含铜品质较高、精细的砂状铜矿,铜矿砂的粒度为0.5-1.0mm,该铜矿砂为黑色的铜矿砂。所述的海泡石是一种纤维状的含水硅酸镁,通常呈白、浅灰、浅黄等颜色,不透明也没有光泽,其质量百分含量为:SiO2:56.5%,Al2O3:24.5%,其余为不可避免的杂质,所述的海泡石的平均粒径为:0.5-1.0mm。
本实施例的一种长寿的高炉用铁口泥套,其具体的制备方法如下:
步骤一:制备铁口泥套浇注料
(1)制备混合物A:按质量份数称取刚玉砖90kg,莫来石60kg,镁质红土镍矿15kg,碳化硅30kg和转炉风淬渣8kg,依次加入到搅拌机中,并搅拌40min,搅拌机转速为250r/min,混合均匀后制得混合物A;
(2)制备混合物B:按质量份数称取杨迪粉2kg,沥青10kg和海藻酸钠0.5kg,依次加入到步骤(1)制备得到的混合物A中,搅拌机继续混合搅拌30min,混合均匀制备得混合物B;
(3)制备浇注料:按质量份数称取添加剂5kg加入到步骤(2)制备得到的混合物B中,搅拌机继续混合搅拌25min,混合均匀制备得铁口泥套浇注料;
步骤二:制备铁口泥套
将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤,其中烘烤方法为:
(1)升温处理
首先,以15℃/h的升温速度升温到150℃,保温4h;
其二,以30℃/h的升温速度升温到500℃,保温2h;
其三,以35℃/h的升温速度升温到850℃,保温6h;
最后,以25℃/h的升温速度升温到1450℃,保温8h;
(2)降温处理
首先,以30℃/h的降温速度降温到1100℃,保温5h;
其二,以40℃/h的降温速度降温到650℃,保温3h;
其三,以25℃/h的降温速度降温到400℃,保温4h;
最后,空冷至常温,即制备得铁口泥套。
本实施例的一种长寿的高炉用铁口泥套,铁口泥套采用刚玉砖、莫来石、镁质红土镍矿、碳化硅、转炉风淬渣、杨迪粉、沥青、海藻酸钠等创造性的组分配比,使得铁口泥套具有良好的抗冲刷、抗侵蚀、耐高温强性能;其中沥青为球状沥青,利用较高的碳素含量提高了铁口泥套的抗侵蚀性能,且铁口泥套浇注料的空隙中残留较多的碳素,使得铁口泥套更加致密,,从而具有较高的强度。
本实施例的铁口泥套的刚玉砖和莫来石采用不同的粒度组成,使得耐火骨料的粒度组成更加合理,莫来石具有良好的抗热震性,刚玉砖使得其具有良好的耐侵蚀性能,而且在浇注料中合理的配入Al2O3微粉、石墨粉、SiO2微粉、硼矿粉、铜矿砂和海泡石使得铁口泥套具有高强度、高耐火度,从而大大提高了高炉铁口的使用寿命,高炉铁口泥套的使用寿命达到46天,且安装方便,不但大大降低了炉前的劳动强度,而且减少炉前事故发生率,较好地保证了高炉炉况稳定和顺行,为低成本炼铁提供技术支持。
实施例2
本实施例的基本内容同实施例1,其不同之处在于:本实施例的铁口泥套各组分按如下质量份组成:刚玉砖80kg,莫来石50kg,镁质红土镍矿10kg,碳化硅20kg,转炉风淬渣5kg,杨迪粉1kg,沥青4kg,海藻酸钠0.5kg,添加剂2kg。
本实施例的一种长寿的高炉用铁口泥套,其具体的制备方法如下:
步骤一:制备铁口泥套浇注料
(1)制备混合物A:按质量份数称取刚玉砖80kg,莫来石50kg,镁质红土镍矿10kg,碳化硅20kg和转炉风淬渣5kg,依次加入到搅拌机中,并搅拌40min,搅拌机转速为250r/min,混合均匀后制得混合物A;
(2)制备混合物B:按质量份数称取杨迪粉1kg,沥青4kg和海藻酸钠0.5kg,依次加入到步骤(1)制备得到的混合物A中,搅拌机继续混合搅拌30min,混合均匀制备得混合物B;
(3)制备浇注料:按质量份数称取添加剂2kg加入到步骤(2)制备得到的混合物B中,搅拌机继续混合搅拌25min,混合均匀制备得铁口泥套浇注料;
步骤二:制备铁口泥套
将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤,其中烘烤方法为:
(1)升温处理
首先,以15℃/h的升温速度升温到150℃,保温4h;
其二,以30℃/h的升温速度升温到500℃,保温2h;
其三,以35℃/h的升温速度升温到850℃,保温6h;
最后,以25℃/h的升温速度升温到1450℃,保温8h;
(2)降温处理
首先,以30℃/h的降温速度降温到1100℃,保温5h;
其二,以40℃/h的降温速度降温到650℃,保温3h;
其三,以25℃/h的降温速度降温到400℃,保温4h;
最后,空冷至常温,即制备得铁口泥套。
本实施例的一种长寿的高炉用铁口泥套,铁口泥套采用刚玉砖、莫来石、镁质红土镍矿、碳化硅、转炉风淬渣、杨迪粉、沥青、海藻酸钠等创造性的组分配比,使得铁口泥套具有良好的抗冲刷、抗侵蚀、耐高温强性能;其中沥青为球状沥青,利用较高的碳素含量提高了铁口泥套的抗侵蚀性能,且铁口泥套浇注料的空隙中残留较多的碳素,使得铁口泥套更加致密,,从而具有较高的强度。
本实施例的铁口泥套的刚玉砖和莫来石采用不同的粒度组成,使得耐火骨料的粒度组成更加合理,莫来石具有良好的抗热震性,刚玉砖使得其具有良好的耐侵蚀性能,而且在浇注料中合理的配入Al2O3微粉、石墨粉、SiO2微粉、硼矿粉、铜矿砂和海泡石使得铁口泥套具有高强度、高耐火度,从而大大提高了高炉铁口的使用寿命,高炉铁口泥套的使用寿命达到48天,且安装方便,不但大大降低了炉前的劳动强度,而且减少炉前事故发生率,较好地保证了高炉炉况稳定和顺行,为低成本炼铁提供技术支持。
实施例3
本实施例的基本内容同实施例1,其不同之处在于:本实施例的铁口泥套各组分按如下质量份组成:刚玉砖85kg,莫来石54kg,镁质红土镍矿12kg,碳化硅25kg,转炉风淬渣6kg,杨迪粉1kg,沥青6kg,海藻酸钠0.5kg,添加剂3kg。
步骤一:制备铁口泥套浇注料
(1)制备混合物A:按质量份数称取刚玉砖85kg,莫来石54kg,镁质红土镍矿12kg,碳化硅25kg和转炉风淬渣6kg,依次加入到搅拌机中,并搅拌40min,搅拌机转速为250r/min,混合均匀后制得混合物A;
(2)制备混合物B:按质量份数称取杨迪粉1kg,沥青6kg和海藻酸钠0.5kg,依次加入到步骤(1)制备得到的混合物A中,搅拌机继续混合搅拌30min,混合均匀制备得混合物B;
(3)制备浇注料:按质量份数称取添加剂3kg加入到步骤(2)制备得到的混合物B中,搅拌机继续混合搅拌25min,混合均匀制备得铁口泥套浇注料;
步骤二:制备铁口泥套
将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤,其中烘烤方法为:
(1)升温处理
首先,以15℃/h的升温速度升温到150℃,保温4h;
其二,以30℃/h的升温速度升温到500℃,保温2h;
其三,以35℃/h的升温速度升温到850℃,保温6h;
最后,以25℃/h的升温速度升温到1450℃,保温8h;
(2)降温处理
首先,以30℃/h的降温速度降温到1100℃,保温5h;
其二,以40℃/h的降温速度降温到650℃,保温3h;
其三,以25℃/h的降温速度降温到400℃,保温4h;
最后,空冷至常温,即制备得铁口泥套。
本实施例的一种长寿的高炉用铁口泥套,铁口泥套采用刚玉砖、莫来石、镁质红土镍矿、碳化硅、转炉风淬渣、杨迪粉、沥青、海藻酸钠等创造性的组分配比,使得铁口泥套具有良好的抗冲刷、抗侵蚀、耐高温强性能;其中沥青为球状沥青,利用较高的碳素含量提高了铁口泥套的抗侵蚀性能,且铁口泥套浇注料的空隙中残留较多的碳素,使得铁口泥套更加致密,,从而具有较高的强度。
本实施例的铁口泥套的刚玉砖和莫来石采用不同的粒度组成,使得耐火骨料的粒度组成更加合理,莫来石具有良好的抗热震性,刚玉砖使得其具有良好的耐侵蚀性能,而且在浇注料中合理的配入Al2O3微粉、石墨粉、SiO2微粉、硼矿粉、铜矿砂和海泡石使得铁口泥套具有高强度、高耐火度,从而大大提高了高炉铁口的使用寿命,高炉铁口泥套的使用寿命达到50天,且安装方便,不但大大降低了炉前的劳动强度,而且减少炉前事故发生率,较好地保证了高炉炉况稳定和顺行,为低成本炼铁提供技术支持。
Claims (3)
1.一种长寿的高炉用铁口泥套的制备方法,其特征在于:其制备方法如下:
步骤一:制备铁口泥套浇注料
(1)制备混合物A:将刚玉砖、莫来石、镁质红土镍矿、碳化硅和转炉风淬渣混合,混合均匀制备得混合物A;
(2)制备混合物B:将杨迪粉、沥青、海藻酸钠依次加入到步骤(1)制备得到的混合物A中,混合均匀制备得混合物B;
(3)制备浇注料:将添加剂加入到步骤(2)制备得到的混合物B中,混合均匀制备得铁口泥套浇注料;
步骤二:制备铁口泥套
将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤即得铁口泥套;
其中,步骤一中混合物A的制备方法为:按质量份数称取刚玉砖80-90份,莫来石50-60份,镁质红土镍矿10-15份,碳化硅20-30份和转炉风淬渣5-8份,依次加入到搅拌机中,并搅拌40min,搅拌机转速为250r/min,混合均匀后制得混合物A;
步骤一中混合物B的制备方法为:按质量份数称取杨迪粉1-2份,沥青4-10份和海藻酸钠0.5份,依次加入到步骤(1)制备得到的混合物A中,搅拌机继续混合搅拌30min,混合均匀制备得混合物B;
步骤一中浇注料的制备方法为:按质量份数称取添加剂2-5份加入到步骤(2)制备得到的混合物B中,搅拌机继续混合搅拌25min,混合均匀制备得铁口泥套浇注料,其中:添加剂按如下质量百分含量组成:Al2O3微粉:30%、石墨粉:25%、SiO2微粉:15%、硼矿粉:15%、铜矿砂:10%、海泡石:5%。
2.根据权利要求1所述的一种长寿的高炉用铁口泥套的制备方法,其特征在于:步骤二的铁口泥套的制备方法为:将步骤一制备得到的浇注料浇注到铁口泥套的模具中,再进行烘烤,其中烘烤方法为:
(1)升温处理
首先,升温到150℃,保温4h;
其二,升温到500℃,保温2h;
其三,升温到850℃,保温6h;
最后,升温到1450℃,保温8h;
(2)降温处理
首先,降温到1100℃,保温5h;
其二,降温到650℃,保温3h;
其三,降温到400℃,保温4h;
最后,空冷至常温,即制备得铁口泥套。
3.根据权利要求1或2所述的一种长寿的高炉用铁口泥套的制备方法,其特征在于:所述的刚玉砖的粒度按如下质量百分含量组成:粒度≤0.074mm:25%,0.074-0.5mm:20%,0.5-1.0mm:35%;1.0-3.0mm:20%;所述的莫来石的粒度按如下质量百分含量组成:粒度≤0.074mm:20%,0.074-0.5mm:30%,0.5-1.0mm:25%;1.0-3.0mm:25%。
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