CN108373337A - 一种高炉内衬耐磨喷补料 - Google Patents
一种高炉内衬耐磨喷补料 Download PDFInfo
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- 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 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 14
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 239000010431 corundum Substances 0.000 claims abstract description 11
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 11
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 11
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000004880 explosion Methods 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims description 10
- 229910052850 kyanite Inorganic materials 0.000 claims description 10
- 239000010443 kyanite Substances 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 8
- 229910052849 andalusite Inorganic materials 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
本发明提出了一种高炉内衬耐磨喷补料,为了解决现有技术中高炉内喷补料耐磨性能差、使用寿命短的问题,一种高炉内衬耐磨喷补料,包含以下重量份的原料:电熔棕刚玉50~70份,白刚玉细粉10~20份,锆复合硅微粉5~15份,氧化铝微粉5~15份,高铝水泥1~8份,复合膨胀剂1~8份,复合防爆剂0.1~0.5份,分散剂0.1~0.5份,本发明的原料配方中精选耐磨性能良好的电熔棕刚玉、白刚玉,使得硬度高,制备的喷补料具有良好的耐高温性能,耐磨抗冲刷性能和抗剥落性能好,使用寿命长。
Description
技术领域
本发明涉及耐火材料技术领域,特别是指一种高炉内衬耐磨喷补料。
背景技术
高炉长寿能产生巨大的经济效益和社会效益,当今发达国家高炉寿命一般都在10年以上,工业发达国家新建和改造高炉设计寿命都在15年以上,有的达到20年。我国高炉寿命相对要短的多,虽然有部分高炉寿命达到了10年,但是高炉平均寿命在6年左右。影响高炉寿命的因素很多,其中我国大多数高炉未进行喷补维护是其寿命短的根本原因,部分寿命超过10年的高炉则都采用了高炉喷补维护技术。因此,对高炉内衬进行定期有效地喷补维护,以及提高喷补料的性能,完善喷补工艺,对提高高炉寿命,降低炼铁成本,减低能耗,提高生铁质量和产量,都具有重要意义。
研究发现,高炉不同部位耐火材料的损毁机理差异较大,炉喉区材料受炉料的冲击和摩擦而磨损,炉身中上部温度处于400~700℃之间,炉内易发生CO的分解反应,造成碳素析出,并沉积于耐火材料空隙中,引起炉衬材料开裂和组织疏松。炉身下部和炉腰是软熔带根部处区域,承受达到60KW/m2的热负荷以及热震、碱金属蒸汽的侵蚀、碳素沉积作用、上升高温炉气的冲刷和炉料下降的磨损以及熔融物侵蚀。炉腹以下主要受渣铁侵蚀和冲刷。可见,研究高性能的高炉喷补料,使其具有较高的强度,较大的体积密度,高的耐磨性能直接决定着炉衬的使用寿命。
发明内容
本发明提出一种高炉内衬耐磨喷补料,为了解决现有技术中高炉内喷补料耐磨性能差、使用寿命短的问题。
本发明的技术方案是这样实现的:一种高炉内衬耐磨喷补料,包含以下重量份的原料:
电熔棕刚玉50~70份,白刚玉细粉10~20份,锆复合硅微粉5~15份,氧化铝微粉5~15份,高铝水泥1~8份,复合膨胀剂1~8份,复合防爆剂0.1~0.5份,分散剂0.1~0.5份。
优选的,所述锆复合硅微粉的平均粒径D0.8~50μm,其中SiO2含量92~95%,ZrO2含量3~7%,Fe2O3≤0.2%。
优选的,所述氧化铝微粉为α-氧化铝微粉,其粒度为1μm,α-氧化铝微粉的理化性能为Al2O3≥99.0%、Fe2O3≤0.04%、R2O≤0.3%、SiO2≤0.1%。
优选的,所述复合膨胀剂为蓝晶石、红柱石和石英砂中的两种或三种,其中蓝晶石粒度为0~0.4mm,红柱石的粒度为0~0.4mm,石英砂粒度为200目。
优选的,分散剂为MG800,PH值为6.0~7.0,其中水不溶物≤0.2%。
本发明的有益效果:
本发明的原料配方中精选耐磨性能良好的电熔棕刚玉、白刚玉,使得硬度高,制备的喷补料具有良好的耐高温性能,耐磨抗冲刷性能和抗剥落性能好,使用寿命长。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:
一种高炉内衬耐磨喷补料,包含以下重量份的原料:
电熔棕刚玉50~70份,白刚玉细粉10份,锆复合硅微粉5份,α-氧化铝微粉5份,高铝水泥1份,复合膨胀剂1份,复合防爆剂0.1份,分散剂0.1份,复合膨胀剂为蓝晶石和石英砂的混合物,其中蓝晶石和石英砂的重量比为1∶1。
该喷补料各组份的颗粒组成:电熔棕刚玉5~8mm,3~5mm,1~3mm,0~1mm,白刚玉细粉325mm,锆复合硅微粉的平均粒径D0.8~50μm。
性能检测
按上述比例配置好的混合物先搅拌2分钟,加入6%的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,烘烤110℃×24h,在高温炉中烧1000℃×3h,测得抗折强度、耐压强度和线变化,检测结果如下表1。
表1
110℃×24h烘后体积密度 | 2.96g/cm3 |
110℃×24h烘后冷态抗折强度 | 14.8MPa |
110℃×24h烘后冷态耐压强度 | 83.0MPa |
1000℃×3h烧后冷态抗折强度 | 19.6MPa |
1000℃×3h烧后冷态耐压强度 | 98.5MPa |
1000℃×3h烧后永久线变化率 | -0.2% |
实施例2:
一种高炉内衬耐磨喷补料,包含以下重量份的原料:
电熔棕刚玉60份,白刚玉细粉15份,锆复合硅微粉8份,α-氧化铝微粉10份,高铝水泥3份,复合膨胀剂5份,复合防爆剂0.4份,分散剂0.3份,复合膨胀剂用蓝晶石、红柱石和石英砂的混合物,其中蓝晶石、红柱石和石英砂的重量比为1∶1∶1。
该喷补料各组份的颗粒组成:电熔棕刚玉5~8mm,3~5mm,1~3mm,0~1mm,白刚玉细粉325mm,锆复合硅微粉的平均粒径D0.8~50μm。
性能检测
按上述比例配置好的混合物先搅拌2分钟,加入6%的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,烘烤110℃×24h,在高温炉中烧1000℃×3h,测得抗折强度、耐压强度和线变化,检测结果如下表2。
表2
110℃×24h烘后体积密度 | 3.04g/cm3 |
110℃×24h烘后冷态抗折强度 | 18.2MPa |
110℃×24h烘后冷态耐压强度 | 90.7MPa |
1000℃×3h烧后冷态抗折强度 | 22.1MPa |
1000℃×3h烧后冷态耐压强度 | 107.7MPa |
1000℃×3h烧后永久线变化率 | +0.1% |
实施例3:
一种高炉内衬耐磨喷补料,包含以下重量份的原料:
电熔棕刚玉70份,白刚玉细粉20份,锆复合硅微粉15份,α-氧化铝微粉15份,高铝水泥8份,复合膨胀剂8份,复合防爆剂0.5份,分散剂0.5份,复合膨胀剂用蓝晶石、红柱石和石英砂的混合物,其中蓝晶石、红柱石和石英砂的重量比为1∶3∶2。
该喷补料各组份的颗粒组成:电熔棕刚玉5~8mm,3~5mm,1~3mm,0~1mm,白刚玉细粉325mm,锆复合硅微粉的平均粒径D0.8~50μm。
性能检测
按上述比例配置好的混合物先搅拌2分钟,加入6%的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,烘烤110℃×24h,在高温炉中烧1000℃×3h,测得抗折强度、耐压强度和线变化,检测结果如下表3。
表3
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (5)
1.一种高炉内衬耐磨喷补料,其特征在于,包含以下重量份的原料:
电熔棕刚玉50~70份,白刚玉细粉10~20份,锆复合硅微粉5~15份,氧化铝微粉5~15份,高铝水泥1~8份,复合膨胀剂1~8份,复合防爆剂0.1~0.5份,分散剂0.1~0.5份。
2.如权利要求1所述的一种高炉内衬耐磨喷补料,其特征在于:
所述锆复合硅微粉的平均粒径D0.8~50μm,其中SiO2含量92~95%,ZrO2含量3~7%,Fe2O3≤0.2%。
3.如权利要求1所述的一种高炉内衬耐磨喷补料,其特征在于:
所述氧化铝微粉为α-氧化铝微粉,其粒度为1μm,α-氧化铝微粉的理化性能为Al2O3≥99.0%、Fe2O3≤0.04%、R2O≤0.3%、SiO2≤0.1%。
4.如权利要求1所述的一种高炉内衬耐磨喷补料,其特征在于:
所述复合膨胀剂为蓝晶石、红柱石和石英砂中的两种或三种,其中蓝晶石粒度为0~0.4mm,红柱石的粒度为0~0.4mm,石英砂粒度为200目。
5.如权利要求1所述的一种高炉内衬耐磨喷补料,其特征在于:
分散剂为MG800,PH值为6.0~7.0,其中水不溶物≤0.2%。
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