CN114163254A - 一种高炉出铁沟主沟浇注料 - Google Patents
一种高炉出铁沟主沟浇注料 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 43
- 229910052742 iron Inorganic materials 0.000 title description 23
- 239000002245 particle Substances 0.000 claims abstract description 82
- 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 55
- 238000010079 rubber tapping Methods 0.000 claims abstract description 44
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 36
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 13
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 12
- 239000011575 calcium Substances 0.000 claims abstract description 12
- -1 calcium nitride Chemical class 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 10
- 229910052593 corundum Inorganic materials 0.000 claims description 61
- 239000010431 corundum Substances 0.000 claims description 56
- 239000000203 mixture Substances 0.000 claims description 20
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052580 B4C Inorganic materials 0.000 claims description 7
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 7
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000011863 silicon-based powder Substances 0.000 claims description 5
- 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 claims description 5
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 5
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 16
- 239000002994 raw material Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- 238000005245 sintering Methods 0.000 description 8
- 238000001035 drying Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009991 scouring Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本发明涉及耐火材料技术领域,尤其是一种高炉出铁沟主沟浇注料,按质量份数计算,包括:矾土颗粒20份‑30份,棕刚玉30份‑40份,碳化硅10份‑25份,氧化铝微粉5份‑10份,高铝水泥1份‑4份,碳素1份‑4份,氮化钙细粉0份‑3份,分散剂0.1份‑0.5份,抗氧化剂0.1份‑1份,水4.5份‑4.8份,通过改变原材料成分及其比例以解决现有技术中存在的现有的技术中存在的现有的高炉出铁沟主沟浇注料制备过程中温度急变带来的对铁沟料的损毁和出铁沟抵抗高温铁水的耐冲刷性等问题。
Description
技术领域
本发明涉及耐火材料技术领域,尤其是一种高炉出铁沟主沟浇注料。
背景技术
高炉出铁沟是引导高炉内高温铁水和熔渣的通道,高炉出铁沟系统包括主沟、支沟和渣沟,其中主沟是高炉内流出来的高温渣铁混合物的共同通道。在主沟后段设计有撇渣器,从高炉里流出来的高温渣铁混合物到达蔽渣器时,由于体积密度不同,在主沟中分成上下两层,即上层的熔渣和下层的铁水,体积密度相对较小的熔渣从上面溢出进入渣沟,而体积密度相对较大的铁水则从撇渣器下面的通道穿过流进支沟。因此,主沟不但承受高温熔渣的侵蚀,而且也要承受高温铁水的冲刷,同时还要承受间歇式出铁引起的温度骤变对主沟的热震损毁,故而主沟使用环境很恶劣。随着钢铁冶炼技术的发展,高炉出铁沟主沟材料及其结构都随之发展,在其结构上设计为整体浇注的贮铁式结构,对主沟浇注料得理化性能要求越来越高,既要降低由于温度急变带来的对铁沟料的损毁,也要提高出铁沟抵抗高温铁水的冲刷性,延长出铁沟的使用寿命。
因此,针对上述问题本发明急需提供一种高炉出铁沟主沟浇注料。
发明内容
本发明的目的在于提供一种高炉出铁沟主沟浇注料,通过改善和增加原材料成分及其比例以解决现有技术中存在的现有的高炉出铁沟主沟浇注料制备过程中温度急变带来的对铁沟料的损毁和出铁沟抵抗高温铁水的耐冲刷性等问题。
本发明提供的一种高炉出铁沟主沟浇注料,按质量份数计算,包括: 矾土颗粒20份-30份,棕刚玉30份-40份,碳化硅10份-25份,氧化铝微粉5份-10份,高铝水泥1份-4份,碳素1份-4份,氮化钙细粉0份-3份,分散剂0.1份-0.5份,抗氧化剂0.1份-1份,水4.5份-4.8份。
优选地,矾土颗粒的成份包括:Al2O3≥87%、TiO2≥4%、Fe2O3≤1.5%、R2O≤0.15%、SiO2≤5%,矾土颗粒的体积密度≥3.25g/cm3。
优选地,矾土颗粒的粒度包括:15-8mm和8-5mm。
优选地,碳化硅包括碳化硅颗粒和碳化硅细粉;棕刚玉为电熔棕刚玉;分散剂包括六偏磷酸钠和三聚磷酸钠中的任意一种;抗氧化剂包括金属硅粉和碳化硼中的任意一种。
优选地,电熔棕刚玉包括电熔棕刚玉颗粒和电熔棕刚玉细粉。
优选地,电熔棕刚玉颗粒粒度包括:5-3mm、 3-1mm和1-0mm,电熔棕刚玉细粉200目。
优选地,碳化硅颗粒的粒度为1-0mm,碳化硅细粉的粒度为325目。
优选地,碳化硅的成份包括:SiC≥97%、Fe2O3≤0.4%、游离碳≤0.5%、游离硅≤0.6%。
优选地,氧化铝微粉为α-氧化铝微粉,粒度为1µm。
优选地,α-氧化铝微粉包括Al2O3≥99.0%、Fe2O3≤0.04%、R2O≤0.3%、SiO2≤0.1%。
本发明提供的一种高炉出铁沟主沟浇注料与现有技术相比具有以下进步:
1、本发明提供的高炉出铁沟主沟浇注料,通过引入氮化钙,遇水发生水解,生成氢氧化钙并放出氨气,即消耗了原材料中多余的水分达到快干的目的,放出的氨气在基质中形成微气孔,使浇注料排气性能良好,防止浇注料在高温使用下出现爆裂现象,同时生成的氢氧化钙提高了浇注料的强度。
2、本发明提供的高炉出铁沟主沟浇注料,主沟浇注料的材质使用Al2O3-SiC-C材质,材料的理化性能优异,这种结构和材料的应用不仅降低了工人劳动的强度,而且大大降低了由于温度急变带来的对铁沟料的损毁,同时提高了出铁沟抵抗高温铁水的冲刷性,从而延长出铁沟的使用寿命。
具体实施方式
下面将对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例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做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。
下面结合具体实施例对本发明作进一步说明。
以下实施例中,所有的原料均为已知的市售产品,作为参考的,提供部分原料的相关参数:
以下实施例所述,按质量份数计算,包括: 矾土颗粒20份-30份,棕刚玉30份-40份,碳化硅10份-25份,氧化铝微粉5份-10份,高铝水泥1份-4份,碳素1份-4份,氮化钙细粉0份-3份,分散剂0.1份-0.5份,抗氧化剂0.1份-1份,水4.5份-4.8份;矾土颗粒的成份包括:Al2O3≥87%、TiO2≥4%、Fe2O3≤1.5%、R2O≤0.15%、SiO2≤5%,矾土颗粒的体积密度≥3.25g/cm3;矾土颗粒的粒度包括:15-8mm和8-5mm;棕刚玉粒度包括:5-3mm、 3-1mm、1-0mm和200目;碳化硅包括碳化硅颗粒和碳化硅细粉;碳化硅颗粒的粒度为1-0mm,碳化硅细粉的粒度为325目;碳化硅的成份包括:SiC≥97%、Fe2O3≤0.4%、游离碳≤0.5%、游离硅≤0.6%;氧化铝微粉为α-氧化铝微粉,粒度为1µm;α-氧化铝微粉包括Al2O3≥99.0%、Fe2O3≤0.04%、R2O≤0.3%、SiO2≤0.1%;棕刚玉为电熔棕刚玉;电熔棕刚玉包括电熔棕刚玉颗粒和电熔棕刚玉细粉;分散剂包括六偏磷酸钠和三聚磷酸钠中的任意一种;抗氧化剂包括金属硅粉和碳化硼中的任意一种。
实施例一
本实施例提供了一种高炉出铁沟主沟浇注料,其原料组分和具体重量份如下:
矾土颗粒 20份,其中,粒度为15-8mm10份,粒度为8-5mm10份;
棕刚玉 38份,其中,电熔棕刚玉颗粒36份,分别包括粒度为5-3mm12份, 粒度为3-1mm12份,粒度为1-0mm12份;电熔棕刚玉细粉2份,粒度为200目;
碳化硅 25份,其中,碳化硅颗粒粒度为1-0mm13份,碳化硅细粉的粒度为325目12份;
氧化铝微粉 10份;
高铝水泥 2份;
碳素 3份;
抗氧化剂:金属硅粉 0.1份;
分散剂:六偏磷酸钠 0.4份;
氮化钙细粉 1.5份;
水 4.5份;
按上述配比配置好的混合物先搅拌2分钟,加入4.5份的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,在温度为110℃的条件下烘烤24h,再放置高温炉中,温度1450℃条件下烧结3h,获得高炉出铁沟主沟浇注料,将浇注料放置于1400℃条件下0.5h后进行热态抗折强度测试,获得检测结果见表一。
实施例二
本实施例提供了一种高炉出铁沟主沟浇注料,其原料组分和具体重量份如下:
矾土颗粒 25份,其中,粒度为15-8mm15份,粒度为8-5mm10份;
棕刚玉 38份,其中,电熔棕刚玉颗粒34份,分别包括粒度为5-3mm12份, 粒度为3-1mm12份,粒度为1-0mm10份;电熔棕刚玉细粉4份,粒度为200目;
碳化硅 20份,其中,碳化硅颗粒粒度为1-0mm10份,碳化硅细粉的粒度为325目10份;
氧化铝微粉 10份;
高铝水泥 2份;
碳素 3份;
抗氧化剂:碳化硼 0.3份;
分散剂:三聚磷酸钠 0.4份;
氮化钙细粉 1.3份;
水 4.6份;
按上述配比配置好的混合物先搅拌2分钟,加入4.6份的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,在温度为110℃的条件下烘烤24h,再放置高温炉中,温度1450℃条件下烧结3h,获得高炉出铁沟主沟浇注料,将浇注料放置于1400℃条件下0.5h后进行热态抗折强度测试,获得检测结果见表一。
实施例三
本实施例提供了一种高炉出铁沟主沟浇注料,其原料组分和具体重量份如下:
矾土颗粒 29份,其中,粒度为15-8mm15份,粒度为8-5mm14份;
棕刚玉 36份,其中,电熔棕刚玉颗粒30份,分别包括粒度为5-3mm10份, 粒度为3-1mm10份,粒度为1-0mm10份;电熔棕刚玉细粉6份,粒度为200目;
碳化硅 18份,其中,碳化硅颗粒粒度为1-0mm8份,碳化硅细粉的粒度为325目10份;
氧化铝微粉 10份;
高铝水泥 2份;
碳素 3份;
抗氧化剂:碳化硼 1份;
分散剂:三聚磷酸钠 0.4份;
氮化钙细粉 0.5份;
水 4.8份;
按上述配比配置好的混合物先搅拌2分钟,加入4.8份的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,在温度为110℃的条件下烘烤24h,再放置高温炉中,温度1450℃条件下烧结3h,获得高炉出铁沟主沟浇注料,将浇注料放置于1400℃条件下0.5h后进行热态抗折强度测试,获得检测结果见表一。
对比例一
本对比例提供了一种高炉出铁沟主沟浇注料,其原料组分和具体重量份如下:
矾土颗粒 29份,其中,粒度为15-8mm15份,粒度为8-5mm14份;
棕刚玉 36份,其中,电熔棕刚玉颗粒30份,分别包括粒度为5-3mm10份, 粒度为3-1mm10份,粒度为1-0mm10份;电熔棕刚玉细粉6份,粒度为200目;
碳化硅 18份,其中,碳化硅颗粒粒度为1-0mm8份,碳化硅细粉的粒度为325目10份;
氧化铝微粉 10份;
高铝水泥 2份;
碳素 3份;
抗氧化剂:碳化硼 1份;
分散剂:三聚磷酸钠 0.4份;
水 4.8份;
按上述配比配置好的混合物先搅拌2分钟,加入4.8份的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,在温度为110℃的条件下烘烤24h,再放置高温炉中,温度1450℃条件下烧结3h,获得高炉出铁沟主沟浇注料,将浇注料放置于1400℃条件下0.5h后进行热态抗折强度测试,获得检测结果见表一。
对比例一与实施例三的区别在于对比例一成份中去掉了氮化钙细粉成份,其他成份及比例均相同。
实施例四
本实施例提供了一种高炉出铁沟主沟浇注料,其原料组分和具体重量份如下:
矾土颗粒 30份,其中,粒度为15-8mm15份,粒度为8-5mm15份;
棕刚玉 40份,其中,电熔棕刚玉颗粒30份,分别包括粒度为5-3mm10份, 粒度为3-1mm10份,粒度为1-0mm10份;电熔棕刚玉细粉10份,粒度为200目;
碳化硅 25份,其中,碳化硅颗粒粒度为1-0mm12份,碳化硅细粉的粒度为325目13份;
氧化铝微粉 10份;
高铝水泥 4份;
碳素 4份;
抗氧化剂:金属硅粉 1份;
分散剂:六偏磷酸钠 0.5份;
氮化钙细粉 3份;
水 4.8份;
按上述配比配置好的混合物先搅拌2分钟,加入4.8份的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,在温度为110℃的条件下烘烤24h,再放置高温炉中,温度1450℃条件下烧结3h,获得高炉出铁沟主沟浇注料,将浇注料放置于1400℃条件下0.5h后进行热态抗折强度测试,获得检测结果见表一。
实施例五
本实施例提供了一种高炉出铁沟主沟浇注料,其原料组分和具体重量份如下:
矾土颗粒 20份,其中,粒度为15-8mm10份,粒度为8-5mm10份;
棕刚玉 30份,其中,电熔棕刚玉颗粒20份,分别包括粒度为5-3mm8份, 粒度为3-1mm8份,粒度为1-0mm4份;电熔棕刚玉细粉10份,粒度为200目;
碳化硅 10份,其中,碳化硅颗粒粒度为1-0mm5份,碳化硅细粉的粒度为325目5份;
氧化铝微粉 5份;
高铝水泥 1份;
碳素 1份;
抗氧化剂:碳化硼 0.1份;
分散剂:三聚磷酸钠 0.1份;
氮化钙细粉 0.5份;
水 4.8份;
按上述配比配置好的混合物先搅拌2分钟,加入4.8份的水后再搅拌3分钟,震动浇注成型为40mm×40mm×160mm的样块,养护24小时,在温度为110℃的条件下烘烤24h,再放置高温炉中,温度1450℃条件下烧结3h,获得高炉出铁沟主沟浇注料,将浇注料放置于1400℃条件下0.5h后进行热态抗折强度测试,获得检测结果见表一。
实施例一-实施例五为高炉出铁沟主沟浇注料的原料成份和质量份配比有所区别。
实施例一-实施例五中获得高炉出铁沟主沟浇注料,对比例一中的高炉出铁沟主沟浇注料,对上述实施例和对比例获得的高炉出铁沟主沟浇注料进行测试前的前处理,然后进行性能测试,分别进行110℃/24h烘干后体积密度测试、110℃/24h烘干后冷态抗折强度测试、110℃/24h烘干后冷态耐压强度测试、1450℃/3h烧结后冷态抗折强度测试、1450℃/3h烧结后冷态耐压强度测试、1450℃/3h烧结后永久线变化率测试、1400℃/0.5h烧结后热态抗折强度测试,测试结果如表一所示:
表一
通过表一中的测试结果可知,本发明所用的原料和质量份配比获得的高炉出铁沟主沟浇注料具有优异的性能表征,110℃/24h烘干后体积密度>3 g/cm3,110℃/24h烘干后冷态抗折强度大于8.5 MPa,110℃/24h烘干后冷态耐压强度大于38 Mpa,此条件下实施例三获得的高炉出铁沟主沟浇注料的冷态耐压强度最优,1450℃/3h烧结后冷态抗折强度大于16Mpa,1450℃/3h烧结后冷态耐压强度大于55Mpa,1450℃/3h烧结后永久线变化率测试膨胀比例较小,1400℃/0.5h烧结后热态抗折强度测试大于4.5 Mpa,实施例三与对比例一相比,对比例一的冷态抗折强度、冷态耐压强度、冷态抗折强度、冷态耐压强度性能均低于实施例三获得的高炉出铁沟主沟浇注料,永久线变化率相对较大,综合看来,实施例三获得的高炉出铁沟主沟浇注料的整体综合性能较好,上述结果显示,本发明提供的成份和配比所获得的高炉出铁沟主沟浇注料的理化性能优异。
本发明提供的高炉出铁沟主沟浇注料,通过引入氮化钙,遇水发生水解,生成氢氧化钙并放出氨气,即消耗了原材料中多余的水分达到快干的目的,放出的氨气在基质中形成微气孔,使浇注料排气性能良好,防止浇注料在高温使用下出现爆裂现象,同时生成的氢氧化钙提高了浇注料的强度;主沟浇注料的材质使用Al2O3-SiC-C材质,材料的理化性能优异,这种结构和材料的应用不仅降低了工人劳动的强度,而且大大降低了由于温度急变带来的对铁沟料的损毁,同时提高了出铁沟抵抗高温铁水的冲刷性,从而延长出铁沟的使用寿命。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims (10)
1.一种高炉出铁沟主沟浇注料,其特征在于,按质量份数计算,包括: 矾土颗粒20份-30份,棕刚玉30份-40份,碳化硅10份-25份,氧化铝微粉5份-10份,高铝水泥1份-4份,碳素1份-4份,氮化钙细粉0份-3份,分散剂0.1份-0.5份,抗氧化剂0.1份-1份,水4.5份-4.8份。
2.根据权利要求1所述的高炉出铁沟主沟浇注料,其特征在于,矾土颗粒的成份包括:Al2O3≥87%、TiO2≥4%、Fe2O3≤1.5%、R2O≤0.15%、SiO2≤5%,矾土颗粒的体积密度≥3.25g/cm3。
3.根据权利要求2所述的高炉出铁沟主沟浇注料,其特征在于,矾土颗粒的粒度包括:15-8mm和8-5mm。
4.根据权利要求3所述的高炉出铁沟主沟浇注料,其特征在于,棕刚玉为电熔棕刚玉;碳化硅包括碳化硅颗粒和碳化硅细粉;分散剂包括六偏磷酸钠和三聚磷酸钠中的任意一种;抗氧化剂包括金属硅粉和碳化硼中的任意一种。
5.根据权利要求4所述的高炉出铁沟主沟浇注料,其特征在于,电熔棕刚玉包括电熔棕刚玉颗粒和电熔棕刚玉细粉。
6.根据权利要求5所述的高炉出铁沟主沟浇注料,其特征在于,电熔棕刚玉颗粒的粒度包括:5-3mm、 3-1mm和1-0mm;电熔棕刚玉细粉的粒度为200目。
7.根据权利要求6所述的高炉出铁沟主沟浇注料,其特征在于,碳化硅颗粒的粒度为1-0mm,碳化硅细粉的粒度为325目。
8.根据权利要求7所述的高炉出铁沟主沟浇注料,其特征在于,碳化硅的成份包括:SiC≥97%、Fe2O3≤0.4%、游离碳≤0.5%、游离硅≤0.6%。
9.根据权利要求8所述的高炉出铁沟主沟浇注料,其特征在于,氧化铝微粉为α-氧化铝微粉,粒度为1µm。
10.根据权利要求9所述的高炉出铁沟主沟浇注料,其特征在于,α-氧化铝微粉包括Al2O3≥99.0%、Fe2O3≤0.04%、R2O≤0.3%、SiO2≤0.1%。
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