CN111943653B - 一种高炉出铁口用环保型无水炮泥及其制备方法 - Google Patents
一种高炉出铁口用环保型无水炮泥及其制备方法 Download PDFInfo
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Abstract
本发明涉及一种高炉出铁口用环保型无水炮泥及其制备方法。其技术方案是:以25~35份质量的棕刚玉、20~35份质量的改性焦炭、1~2份质量的鳞片石墨、0.5~2份质量的高岭土微粉为原料,以占所述原料10~25wt%的聚碳硅烷或聚硅氮烷为结合剂,0.2~2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。本发明借助焦炭的球形改性以及结合剂的原位反应烧结形成SiC或Si3N4网络,所制备的高炉出铁口用环保型无水炮泥抗铁水冲刷能力和抗侵蚀性能优良,易烧结、中高温强度高、可塑性强,并且具有工艺简单、环境友好的特点。
Description
技术领域
本发明属于高炉出铁口用耐火材料技术领域,尤其涉及一种高炉出铁口用环保型无水炮泥及其制备方法。
背景技术
随着冶炼技术的飞速发展,高炉大型化以及高强冶炼已成为当今钢铁冶金领域的主流,这对高炉出铁口用炮泥提出了新的挑战。通常,炮泥是用于封堵高炉出铁口的耐火可塑料,是渣铁侵蚀和冲刷最严重的区域,对高炉的使用寿命影响巨大。高炉炼铁过程中,出铁口需要被反复充填和打开,炮泥需要承受高炉铁水和渣液强烈的物理、化学侵蚀。这使得炮泥需要具备较高的耐火度、抗渣和铁水冲刷能力;此外,炮泥还须有高的体积稳定性、较好的烧结性能、高的中高温强度和一定的开口性能。
目前,高炉出铁口普遍使用无水炮泥,其以焦油、煤沥青为结合剂,通过结合剂碳化形成碳网络结构将骨料和基质结合在一起。但是,焦油和煤沥青通常含有大量的多环芳烃类的碳氢化合物,其中最为典型的苯并芘(BaP)具有强烈的致癌性。为解决这一环保问题,“一种高炉用环保型炮泥”(CN104725063A)的专利技术,公开了一种以碳树脂和酚醛树脂为结合剂取代焦油和沥青的环保型炮泥。此方法制得的炮泥虽然解决了炮泥中致癌烟气的形成问题、改善了炉前操作环境,但是由于酚醛树脂的残碳量低而致使炮泥的气孔率显著增加,进而明显降低了炮泥耐铁水冲刷能力。为提高炮泥的抗铁水冲刷能力,“一种干式低碳环保炮泥及其制作方法”(CN 104478443A)的专利技术,公开了一种添加碳化硅和氮化硅的复合原料制备环保炮泥,提高炮泥的抗侵蚀和抗冲刷性能。当碳化硅和氮化硅大量添加并在炮泥中形成网络结构时,炮泥的抗冲刷性能和抗侵蚀将显著提高;但是,碳化硅和氮化硅均为非金属键结合的化合物,其大量添加于炮泥中必将导致炮泥难烧结而发生高温强度急剧下降;因而,利用该专利技术制备炮泥,碳化硅和氮化硅的添加量必须控制在一定范围,致使炮泥抗冲刷性能提高的幅度有限。
发明内容
本发明旨在克服现有技术缺陷,目的是提供一种工艺简单的高炉出铁口用环保型无水炮泥的制备方法,用该方法制备的高炉出铁口用环保型无水炮泥抗铁水冲刷能力和抗侵蚀性能优良,易烧结、中高温强度高、不污染环境、现场易生产等优点,能够满足高炉大型化高强冶炼过程中出铁口的服役环境要求。
为实现上述目的,本发明采用的技术方案的步骤是:
以25~35份质量的棕刚玉、20~35份质量的改性焦炭、1~2份质量的鳞片石墨、0.5~2份质量的高岭土微粉为原料,以占所述原料10~25wt%的聚碳硅烷或聚硅氮烷为结合剂,0.2~2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~60份质量、30~40份质量和10~20份质量,所述工业酒精占复合粉体质量的2~5wt%。
所述棕刚玉的Al2O3含量≥95wt%;所述棕刚玉的颗粒级配是:粒径为1~3mm占所述棕刚玉45~50wt%,粒径小于1mm占所述棕刚玉25~30wt%,粒径小于1mm占所述棕刚玉25~30wt%。
所述鳞片石墨中碳含量≥95wt%,粒度≤0.074mm。
所述聚碳硅烷的分子量≥1800,所述聚硅氮烷浓度≥58wt%。
所述红柱石粉中Al2O3含量≥60wt%,粒度≤0.074mm;所述酚醛树脂粉的残碳率≥40wt%。
由于采用上述技术方案,本发明与现有技术相比,具有如下积极效果:
本发明采用聚碳硅烷或聚硅氮烷为结合剂制备环保型无水炮泥,替代传统焦油、煤沥青和酚醛树脂等。一方面,充分利用聚碳硅烷或聚硅氮烷在高温下原位反应形成SiC或Si3N4网络的同时实现炮泥的高温烧结,通过原位形成的SiC或Si3N4网络对炮泥进行增强增韧以及SiC或Si3N4对铁水和渣液的不润湿,赋予炮泥优异的抗铁水冲刷、抗侵蚀性能,提高出铁口炮泥的使用寿命;另一方面,采用聚碳硅烷或聚硅氮烷为结合剂制备环保型无水炮泥,工艺简单,其高温分解时无有毒烟气的产生,避免了炮泥对环境和人员的身体伤害,故所制备的高炉出铁口用环保型无水炮泥绿色环保。
本发明制备的环保型无水炮泥中引入球形改性焦炭,通过球形改性焦炭来提高炮泥中颗粒的流动性和可塑性,降低炮泥的马夏值;再者,球形改性焦炭中还包含红柱石粉和酚醛树脂粉,在高温下酚醛树脂可碳化形成玻璃碳,与红柱石原位反应形成SiC和Al2O3,达到反应烧结目的的同时,原位形成SiC提高炮泥的抗铁水冲刷能力。此外,未发生反应的红柱石在高温下发生一次莫来石化和二次莫来石化的过程存在一定的体积膨胀效应,能提高炮泥在高温下的体积稳定性。
本发明制备的环保型无水炮泥中还添加鳞片石墨,呈片状的鳞片石墨在炮泥中发挥着润滑作用,能提高炮泥的可塑性,降低炮泥的马夏值;此外,鳞片石墨在高温下与红柱石反应原位形成SiC,有利于炮泥的高温强度和抗铁水冲刷能力。鳞片石墨与铁水的不润湿性,能提高炮泥的抗侵蚀性能,防止出铁口扩孔的产生。
本发明制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.87~1.97g/cm3,1400℃×3h体积密度为1.80~1.95g/cm3;200℃×24h抗折强度为7~10MPa,1400℃×3h抗折强度为7~12MPa,马夏值(40℃)为0.4~1.0MPa,平均出铁时间166~200min/次,平均每次出铁量为1005~1258吨/次。
因此,本发明具有工艺简单、环境友好的特点,所制备的高炉出铁口用环保型无水炮泥铁水冲刷能力和抗侵蚀性能优良,易烧结、中高温强度高、可塑性强。
具体实施方式
下面结合具体实施方式对本发明作进一步的描述,并非对其保护范围的限制。
所述棕刚玉的Al2O3含量≥95wt%;所述棕刚玉的颗粒级配是:粒径为1~3mm占所述棕刚玉45~50wt%,粒径小于1mm占所述棕刚玉25~30wt%,粒径小于1mm占所述棕刚玉25~30wt%。
所述鳞片石墨中碳含量≥95wt%,粒度≤0.074mm。
所述聚碳硅烷的分子量≥1800,所述聚硅氮烷浓度≥58wt%。
所述红柱石粉中Al2O3含量≥60wt%,粒度≤0.074mm;所述酚醛树脂粉的残碳率≥40wt%。
实施例1
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以25~30份质量的棕刚玉、30~35份质量的改性焦炭、1~2份质量的鳞片石墨、0.5~2份质量的高岭土微粉为原料,以占所述原料20~25wt%的聚碳硅烷为结合剂,0.5~2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~55份质量、34~40份质量和10~18份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例1制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.87~1.90g/cm3,1400℃×3h体积密度为1.80~1.88g/cm3;200℃×24h抗折强度为7~8MPa,1400℃×3h抗折强度为8~11MPa,马夏值(40℃)为0.4~0.8MPa,平均出铁时间166~189min/次,平均每次出铁量为1107~1256吨/次。
实施例2
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以30~35份质量的棕刚玉、24~32份质量的改性焦炭、0.5~1份质量的鳞片石墨、0.5~2份质量的高岭土微粉为原料,以占所述原料10~18wt%的聚碳硅烷为结合剂,0.2~1wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为53~60份质量、30~35份质量和12~20份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例2制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.87~1.92g/cm3,1400℃×3h体积密度为1.85~1.90g/cm3;200℃×24h抗折强度为7~9MPa,1400℃×3h抗折强度为8~12MPa,马夏值(40℃)为0.5~0.9MPa,平均出铁时间168~195min/次,平均每次出铁量为1005~1158吨/次。
实施例3
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以25~32份质量的棕刚玉、20~26份质量的改性焦炭、1~2份质量的鳞片石墨、0.8~1.3份质量的高岭土微粉为原料,以占所述原料15~20wt%的聚碳硅烷为结合剂,0.2~1.6wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~55份质量、30~35份质量和10~18份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例3制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.89~1.91g/cm3,1400℃×3h体积密度为1.87~1.91g/cm3;200℃×24h抗折强度为8~10MPa,1400℃×3h抗折强度为8~12MPa,马夏值(40℃)为0.6~1.0MPa,平均出铁时间172~196min/次,平均每次出铁量为1117~1258吨/次。
实施例4
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以25~32份质量的棕刚玉、20~26份质量的改性焦炭、1~2份质量的鳞片石墨、1~2份质量的高岭土微粉为原料,以占所述原料20~25wt%的聚硅氮烷为结合剂,0.6~2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~55份质量、30~35份质量和10~18份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例4制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.88~1.93g/cm3,1400℃×3h体积密度为1.88~1.93g/cm3;200℃×24h抗折强度为8~10MPa,1400℃×3h抗折强度为7~11MPa,马夏值(40℃)为0.5~0.9MPa,平均出铁时间176~199min/次,平均每次出铁量为1105~1200吨/次。
实施例5
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以25~32份质量的棕刚玉、20~26份质量的改性焦炭、1~2份质量的鳞片石墨、0.8~1.3份质量的高岭土微粉为原料,以占所述原料10~18wt%的聚硅氮烷为结合剂,0.5~2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~55份质量、30~35份质量和10~18份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例5制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.89~1.97g/cm3,1400℃×3h体积密度为1.83~1.91g/cm3;200℃×24h抗折强度为8~10MPa,1400℃×3h抗折强度为7~12MPa,马夏值(40℃)为0.4~0.9MPa,平均出铁时间180~200min/次,平均每次出铁量为1009~1255吨/次。
实施例6
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以25~32份质量的棕刚玉、20~26份质量的改性焦炭、1~2份质量的鳞片石墨、0.8~1.3份质量的高岭土微粉为原料,以占所述原料15~20wt%的聚硅氮烷为结合剂,0.2~1.2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为53~60份质量、34~40份质量和12~20份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例6制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.90~1.96g/cm3,1400℃×3h体积密度为1.85~1.93g/cm3;200℃×24h抗折强度为7~9MPa,1400℃×3h抗折强度为8~10MPa,马夏值(40℃)为0.5~1.0MPa,平均出铁时间166~192min/次,平均每次出铁量为1012~1258吨/次。
实施例7
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以30~35份质量的棕刚玉、24~32份质量的改性焦炭、1~2份质量的鳞片石墨、0.5~1份质量的高岭土微粉为原料,以占所述原料5~12wt%的聚碳硅烷和5~15wt%的聚硅氮烷为结合剂,0.4~1.8wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~55份质量、30~35份质量和10~18份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例7制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.92~1.97g/cm3,1400℃×3h体积密度为1.86~1.95g/cm3;200℃×24h抗折强度为8~10MPa,1400℃×3h抗折强度为8~10MPa,马夏值(40℃)为0.4~0.8MPa,平均出铁时间176~198min/次,平均每次出铁量为1107~1258吨/次。
实施例8
一种高炉出铁口用环保型无水炮泥及其制备方法。本实施例所述制备方法的具体步骤是:
先以30~35份质量的棕刚玉、24~32份质量的改性焦炭、1~2份质量的鳞片石墨、0.5~1份质量的高岭土微粉为原料,以占所述原料5~12wt%的聚碳硅烷和5~15wt%的聚硅氮烷为结合剂,0.2~1.2wt%的羧甲基纤维素及柠檬酸为添加剂。将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥。
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭。所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~60份质量、30~40份质量和10~20份质量,所述工业酒精占复合粉体质量的2~5wt%。
本实施例8制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.87~1.95g/cm3,1400℃×3h体积密度为1.82~1.93g/cm3;200℃×24h抗折强度为7~10MPa,1400℃×3h抗折强度为7~11MPa,马夏值(40℃)为0.5~1.0MPa,平均出铁时间176~190min/次,平均每次出铁量为1065~1258吨/次。
本具体实施方式与现有技术相比,具有如下积极效果:
本具体实施方式采用聚碳硅烷或聚硅氮烷为结合剂制备环保型无水炮泥,替代传统焦油、煤沥青和酚醛树脂等。一方面,充分利用聚碳硅烷或聚硅氮烷在高温下原位反应形成SiC或Si3N4网络的同时实现炮泥的高温烧结,通过原位形成的SiC或Si3N4网络对炮泥进行增强增韧以及SiC或Si3N4对铁水和渣液的不润湿,赋予炮泥优异的抗铁水冲刷、抗侵蚀性能,提高出铁口炮泥的使用寿命;另一方面,采用聚碳硅烷或聚硅氮烷为结合剂制备环保型无水炮泥,工艺简单,其高温分解时无有毒烟气的产生,避免了炮泥对环境和人员的身体伤害,故所制备的高炉出铁口用环保型无水炮泥绿色环保。
本具体实施方式制备的环保型无水炮泥中引入球形改性焦炭,通过球形改性焦炭来提高炮泥的流动性和可塑性,降低炮泥的马夏值;再者,球形改性焦炭中还包含红柱石粉和酚醛树脂粉,在高温下酚醛树脂可碳化形成玻璃碳,与红柱石原位反应形成SiC和Al2O3,达到反应烧结目的的同时,原位形成SiC提高炮泥的抗铁水冲刷能力。此外,未发生反应的红柱石在高温下发生一次莫来石化和二次莫来石化的过程存在一定的体积膨胀效应,能提高炮泥在高温下的体积稳定性。
本具体实施方式制备的环保型无水炮泥中还添加鳞片石墨,呈片状的鳞片石墨在炮泥中发挥着润滑作用,能提高炮泥的可塑性,降低炮泥的马夏值;此外,鳞片石墨在高温下与红柱石反应原位形成SiC,有利于炮泥的高温强度和抗铁水冲刷能力。鳞片石墨与铁水的不润湿性,能提高炮泥的抗侵蚀性能,防止出铁口扩孔的产生。
本具体实施方式制备的高炉出铁口用环保型无水炮泥经检测:200℃×24h体积密度为1.87~1.97g/cm3,1400℃×3h体积密度为1.80~1.95g/cm3;200℃×24h抗折强度为7~10MPa,1400℃×3h抗折强度为7~12MPa,马夏值(40℃)为0.4~1.0MPa,平均出铁时间166~200min/次,平均每次出铁量为1005~1258吨/次。
因此,本具体实施方式具有工艺简单、环境友好的特点,所制备的高炉出铁口用环保型无水炮泥铁水冲刷能力和抗侵蚀性能优良,易烧结、中高温强度高、可塑性强。
Claims (6)
1.一种高炉出铁口用环保型无水炮泥的制备方法,其特征在于:以25~35份质量的棕刚玉、20~35份质量的改性焦炭、1~2份质量的鳞片石墨、0.5~2份质量的高岭土微粉为原料,以占所述原料10~25wt%的聚碳硅烷或聚硅氮烷为结合剂,0.2~2wt%的羧甲基纤维素及柠檬酸为添加剂;将所述原料、结合剂和添加剂湿碾20~30分钟,然后经挤泥机挤出成型,制得高炉出铁口用环保型无水炮泥;
所述改性焦炭按如下方法制得:将焦炭、红柱石粉与酚醛树脂粉混合共磨至粒度小于0.074mm的复合粉体,然后在造粒机中对所述复合粉体喷洒工业酒精,制成粒度为0.1~3mm的球形改性焦炭;最后将球形改性焦炭在100℃下烘干12~24小时,即得改性焦炭;所述改性焦炭中焦炭、红柱石粉与酚醛树脂粉的质量占比分别为50~60份质量、30~40份质量和10~20份质量,所述工业酒精占复合粉体质量的2~5wt%。
2.如权利要求1所述的高炉出铁口用环保型无水炮泥的制备方法,其特征在于:所述棕刚玉的Al2O3含量≥95wt%;所述棕刚玉的颗粒级配是:粒径为1~3mm占所述棕刚玉45~50wt%,粒径小于1mm占所述棕刚玉25~30wt%。
3.如权利要求1所述的高炉出铁口用环保型无水炮泥的制备方法,其特征在于:所述鳞片石墨中碳含量≥95wt%,粒度≤0.074mm。
4.如权利要求1所述的高炉出铁口用环保型无水炮泥的制备方法,其特征在于:所述聚碳硅烷的分子量≥1800,所述聚硅氮烷浓度≥58wt%。
5.如权利要求1所述的高炉出铁口用环保型无水炮泥的制备方法,其特征在于:所述红柱石粉中Al2O3含量≥60wt%,粒度≤0.074mm;所述酚醛树脂粉的残碳率≥40wt%。
6.一种高炉出铁口用环保型无水炮泥,其特征在于:所述高炉出铁口用环保型无水炮泥是根据权利要求1~5项中任一项所述高炉出铁口用环保型无水炮泥的制备方法所制备的高炉出铁口用环保型无水炮泥。
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