CN110105074A - 一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法 - Google Patents
一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,所述钢包滑板砖由滑板本体和氧化锆板构成;滑板本体按重量百分比计组成为:电熔镁砂颗粒17‑38%、废镁铬砖颗粒25‑37%、碳化硅颗粒1‑10%、电熔镁砂细粉5‑10%、废镁铬砖细粉6‑10%、α‑氧化铝微粉1‑5%、金属铝细粉4‑15%、金属硅细粉0.5‑3.0%、N330炭黑粉1‑3%、高温沥青粉0.5‑3%、粘土粉2‑5%、树脂结合剂3‑5%。本发明的钢包滑板砖具机械强度高,热震稳定性好,荷重软化点高,使用寿命长,抗钢水、钢渣侵蚀和冲刷等优点,可应用于冶炼低碳钢和超低碳钢的钢包滑动系统代替其它材质的滑板。
Description
技术领域
本发明涉及炼钢用耐火材料技术领域,更具体的说是涉及一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法。
背景技术
在连铸生产中,钢包滑板是钢包滑动机构滑动的耐火材料部分。分为两块或者三块滑板结构,滑板工作表面涂有铅粉,以保持滑动的流畅性。中间有开口,并根据开口直径大小和机构样式命名。目前钢包滑动系统多采用机压成型的铝碳质、铝锆碳质、镁碳材质滑板砖,主要原料以刚玉、铝矾土、镁砂为主要原料,添加适量的碳素材料,如石墨或炭黑,以酚醛树脂为结合剂,机压而成。
传统铝碳质钢包滑板在使用中存在如下问题:(1)强度不高,特别是高温氧化后强度会降低,在使用过程中,抗钢水冲刷能力较差,使用寿命短,一般仅能使用2次;(2)在高温使用时,材料易于氧化而失去其中的碳,不仅造成结构疏松,强度下降,而且抗冲刷能力大幅度下降;(3)由于铝碳不烧滑板的强度不高,使用过程滑板铸孔两边很容易出现断裂纹,造成漏钢,烧坏钢包机构和造成钢包浇钢生产不能正常进行。
从近期国内外技术发展趋势看,有以下几种途径提高滑板的性能:(1)通过改进材质提高制品的性能,例如提高材料档次,以刚玉细粉替代高铝粉,尖晶石细粉替代高铝粉,以提高制品的抗侵蚀性能和冲刷性能;(2)改进制造工艺,例如采用氮化技术,使制品形成氮化硅、赛隆(SiALON)结合,大幅度提高制品强度,提高抗热震性能和耐冲刷能力;(3)滑板进行轻烧油浸,降低滑板气孔率,提高其强度,增加残炭量提高其抗侵蚀能力。
因此,结合上述问题,提供一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,是本领域技术人员亟需解决的问题。
发明内容
本发明提供了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,该方法旨在解决现有技术中含碳耐火材料的碳含量过高,污染钢水,造成钢水碳含量增高等问题。本发明钢包滑动系统用镶嵌锆板的镁碳质钢包滑板砖,制备方法简单可行,制备出的钢包滑板砖具有抗钢水和钢渣的侵蚀和冲刷,机械强度高,热震稳定性好,荷重软化点高等优点。
为了实现上述目的,本发明采用如下技术方案:
一种铸孔镶嵌锆板的镁碳质钢包滑板砖,所述钢包滑板砖由滑板本体和氧化锆板构成;滑板本体按重量百分比计,由如下组分组成:电熔镁砂颗粒17-38%、废镁铬砖颗粒25-37%、碳化硅颗粒1-10%、电熔镁砂细粉5-10%、废镁铬砖细粉6-10%、α-氧化铝微粉1-5%、金属铝细粉4-15%、金属硅细粉0.5-3.0%、N330炭黑粉1-3%、高温沥青粉0.5-3%、粘土粉2-5%、树脂结合剂3-5%。
优选的,所述电熔镁砂颗粒粒径为1-5mm,所述电熔镁砂细粉的粒级为240目,废镁铬砖颗粒的粒径为1-5mm。
优选的,电熔镁砂细粉的粒级为320目。
优选的,所述电熔镁砂颗粒以质量百分比计,化学组分为:成分A:MgO≥97%,成分B:SiO2≤0.1%、Fe2O3≤0.2%、Na2O+K2O≤0.2%,余量为杂质;所述电熔镁砂细粉以质量百分比计,化学组分为:成分A:MgO≥96%,成分B:SiO2≤0.8%、Fe2O3≤0.3%、Na2O+K2O≤0.3%,余量为杂质;所述废镁铬砖颗粒以质量百分比计,化学组分为:成分A:Cr2O3≥28%、MgO≥60.0%,成分B:SiO2≤5.05%、Fe2O3≤2.2%、Na2O+K2O≤0.3%,余量为杂质;碳化硅颗粒以质量百分比计,化学组分为:SiC≥97%,余量为杂质。
优选的,所述金属铝细粉的粒级为320目,金属硅细粉的粒级为240目,N330炭黑粉的粒径为5-8μm。
优选的,所述金属铝细粉以质量百分比计,化学组分为:Al≥99.0%,余量为杂质;金属硅细粉以质量百分比计,化学组分为:Si≥98.0%,余量为杂质;N330炭黑粉以质量百分比计,化学组分为:C≥99.0%,余量为杂质。
优选的,所述α-氧化铝微粉的粒径为:1-5μm,α-氧化铝微粉以质量百分比计,其化学组分为:成分A:Al2O3≥98.0%,成分B:SiO2≤0.3%、Fe2O3≤0.3%、Na2O+K2O≤0.4%,余量为杂质。
优选的,所述树脂结合剂为5323滑板专用树脂,其性能如下:粘度为15-25Pa.S,固含量≥78%,残碳≥45,游离酚小于5%,水份小于2%,pH为6.8~7.1。
一种铸孔镶嵌锆板的镁碳质钢包滑板砖的制备方法,具体步骤如下:
S1、按比例称取电熔镁砂细粉、废镁铬砖细粉、α-氧化铝微粉、N330炭黑粉、高温沥青粉、金属铝细粉、金属硅细粉和粘土粉共磨,混合均匀,得到共磨粉;
S2、按比例称取电熔镁砂颗粒、废镁铬砖颗粒和碳化硅颗粒,加入高速混碾机中,干混2~5min后,加入树脂结合剂,混碾2~3min,混合均匀,得到S2骨料;
S3、向S2得到的骨料中加入共磨粉,碾压30-40min后出料,压料、困料0.5小时,投入1000吨液压机压制成型,静置12h得到半成品;
S4、将步骤S3所得的半成品放入干燥窑热处理24h,进窑口温度为25-60℃,烘烤5h,温度为60-110℃,烘烤6h,温度为110-200℃烘烤13h,装窑车置入中温窑设置温度620℃保温18h,出窑拣选,得到一种铸孔镶嵌锆板的镁碳质钢包滑板砖。
优选的,所述步骤S3中1000吨液压机可用630吨电动摩擦压力机替代。
经由上述技术方案可知,与现有技术相比,本发明的有益效果如下:
1、通过加入共磨粉,经由高速恒温混练工艺,分散均匀,使得制品在使用过程中形成均匀分布、尺寸微细的气孔,能够很好的吸收和耗散弹性应变能,缓解热应力对材料的破坏,改善镶嵌锆板的镁碳质钢包滑板砖的热震稳定性,提高其抗剥落性和抵抗钢渣和钢水的侵蚀性能;
2、采用金属铝、粉金属硅粉抗氧化剂,有效防止树脂在高温下氧化,显著减少材料因高温氧化脱碳而引起的结构剥落;
3、加入低膨胀性能废镁铬砖,吸收骨料热膨胀产生的应力,提高材料的抗热震性和抗剥落性,利用其在高温下能够优良抵抗钢渣的侵蚀,来提高复合材料的侵蚀和抗冲刷性。
4、镶嵌锆板的镁碳质钢包滑板砖的本体中碳含量(树脂碳等)碳低于4%,与钢水接触铸孔的氧化锆板不含碳,其不会对钢水增碳,能满足钢厂冶炼品种钢要求,同时具有良好的抵抗钢水和钢渣的侵蚀性能和热震稳定性,从而满足洁净钢和超低碳钢的生产。减少钢包滑板砖在使用过程产生铸孔处横向的断裂,保障滑板连滑使用。高钙钢用铸孔镶嵌锆板的镁碳质滑板砖具有抗钢水和钢渣的侵蚀和冲刷,机械强度高,热震稳定性好,荷重软化点高等优点。代替其它材质应用于冶炼低碳钢和超低碳钢的钢包滑动系统的滑板,其使用寿命≥3次。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据提供的附图获得其他的附图。
图1为本发明生产工艺的流程图。
具体实施方式
下面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。
实施例1:
本发明实施例1公开了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,采用的技术方案如下:
一种铸孔镶嵌锆板的镁碳质钢包滑板砖,所述钢包滑板砖由基料和氧化锆板构成;基料按重量百分比计,由如下组分组成:电熔镁砂颗粒粒径为0-1mm占14%、粒径为1-3mm占10%,废镁铬砖颗粒粒径为1-3mm占19%、粒径为3-5mm占14%,碳化硅颗粒粒径为0-1mm占比5%,电熔镁砂细粉粒型为240目占比7%,废镁铬砖细粉粒型200目占比8.5%,α-氧化铝微粉粒径5μm占比1%,金属铝细粉粒型320目占比8%,金属硅细粉粒型320目占比2%,N330炭黑粉粒径5μm占比1.5%、高温沥青粉粒型320目占比2%、粘土粉粒型200目占比3.7%、树脂结合剂占比4.3%。
实施例2:
本发明实施例2公开了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,采用的技术方案如下:
一种铸孔镶嵌锆板的镁碳质钢包滑板砖,所述钢包滑板砖由基料和氧化锆板构成;基料按重量百分比计,由如下组分组成:电熔镁砂颗粒粒径为3-5mm占17%、粒径为1-3mm占13%,废镁铬砖颗粒粒径为1-3mm占21%、粒径为3-5mm占7%,碳化硅颗粒粒径为0-1mm占比5%,电熔镁砂细粉粒型为320目占比5%,废镁铬砖细粉粒型200目占比10%,α-氧化铝微粉粒径5μm占比1%,金属铝细粉粒型320目占比10%,金属硅细粉粒型320目占比1.5%,N330炭黑粉粒径5μm占比1.5%、高温沥青粉粒型320目占比1%、粘土粉粒型200目占比4%、树脂结合剂占比3%。
实施例3:
本发明实施例3公开了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,采用的技术方案如下:
一种铸孔镶嵌锆板的镁碳质钢包滑板砖,所述钢包滑板砖由基料和氧化锆板构成;基料按重量百分比计,由如下组分组成:电熔镁砂颗粒粒径为3-5mm占10%、粒径为1-3mm占15%,废镁铬砖颗粒粒径为1-3mm占18%、粒径3-5mm占15%,碳化硅颗粒粒径为0-1mm占比5%,电熔镁砂细粉粒型为320目占比6%,废镁铬砖细粉粒型200目占比8%,α-氧化铝微粉粒径5μm占比1%,金属铝细粉粒型320目占比11%,金属硅细粉粒型320目占比0.5%,N330炭黑粉粒径5μm占比1.5%、高温沥青粉粒型320目占比1%、粘土粉粒型200目占比3.7%、树脂结合剂占比4.3%。
实施例4:
本发明实施例4公开了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,采用的技术方案如下:
一种铸孔镶嵌锆板的镁碳质钢包滑板砖,所述钢包滑板砖由基料和氧化锆板构成;基料按重量百分比计,由如下组分组成:电熔镁砂颗粒粒径为3-5mm占14%、粒径为1-3mm占10%,废镁铬砖颗粒粒径为1-3mm占20%、粒径为3-5mm占16%,碳化硅颗粒粒径为0-1mm占比3%,电熔镁砂细粉粒型为320目占比5%,废镁铬砖细粉粒型200目占比10%,α-氧化铝微粉粒径5μm占比1%,金属铝细粉粒型320目占比6%,金属硅细粉粒型320目占比3%,N330炭黑粉粒径5μm占比3%、高温沥青粉粒型320目占比3%、粘土粉粒型200目占比3%、树脂结合剂占比3%。
实施例5:
本发明实施例5公开了一种铸孔镶嵌锆板的镁碳质钢包滑板砖及其制备方法,采用的技术方案如下:
一种铸孔镶嵌锆板的镁碳质钢包滑板砖,所述钢包滑板砖由基料和氧化锆板构成;基料按重量百分比计,由如下组分组成:电熔镁砂颗粒粒径为3-5mm占12%、粒径为1-3mm占10%,废镁铬砖颗粒粒径为1-3mm占23%、粒径为3-5mm占5%,碳化硅颗粒粒径为0-1mm占比10%,电熔镁砂细粉粒型为320目占比10%,废镁铬砖细粉粒型200目占比6%,α-氧化铝微粉粒径5μm占比3%,金属铝细粉粒型320目占比14%,金属硅细粉粒型320目占比0.5%,N330炭黑粉粒径5μm占比1%、高温沥青粉粒型320目占比0.5%、粘土粉粒型200目占比2%、树脂结合剂占比3%。
本发明所述的钢包滑动系统用铸孔镶嵌锆板的镁碳质钢包滑板砖的主要理化指标如下:MgO≥60%、C≤4%、200℃烘后体积密度≥3.20g/cm3、显气孔率(200℃×24h)≤8%、耐压强度(200℃×24h)≥130MPa、线变化率(1600℃×3h)0~1.0%;氧化锆板ZrO2≥94%、耐压强度(200℃×24h)≥200MPa、线变化率(1600℃×3h)0~1.0%。本产品在钢包滑动系统使用,镶嵌锆板的镁碳质钢包滑板砖的使用寿命≥3次,在使用过程中强度高、耐侵蚀、热稳定性好。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
Claims (7)
1.一种铸孔镶嵌锆板的镁碳质钢包滑板砖,其特征在于,所述钢包滑板砖由滑板本体和氧化锆板构成;滑板本体按重量百分比计,由如下组分组成:电熔镁砂颗粒17-38%、废镁铬砖颗粒25-37%、碳化硅颗粒1-10%、电熔镁砂细粉5-10%、废镁铬砖细粉6-10%、α-氧化铝微粉1-5%、金属铝细粉4-15%、金属硅细粉0.5-3.0%、N330炭黑粉1-3%、高温沥青粉0.5-3%、粘土粉2-5%、树脂结合剂3-5%。
2.根据权利要求1所述的一种铸孔镶嵌锆板的镁碳质钢包滑板砖,其特征在于,所述电熔镁砂颗粒粒径为1-5mm,所述电熔镁砂细粉的粒级为240目,废镁铬砖颗粒的粒径为1-5mm。
3.根据权利要求1所述的一种铸孔镶嵌锆板的镁碳质钢包滑板砖,其特征在于,所述电熔镁砂颗粒以质量百分比计,化学组分为:成分A:MgO≥97%,成分B:SiO2≤0.1%、Fe2O3≤0.2%、Na2O+K2O≤0.2%,余量为杂质;所述电熔镁砂细粉以质量百分比计,化学组分为:成分A:MgO≥96%,成分B:SiO2≤0.8%、Fe2O3≤0.3%、Na2O+K2O≤0.3%,余量为杂质;所述废镁铬砖颗粒以质量百分比计,化学组分为:成分A:Cr2O3≥28%、MgO≥60.0%,成分B:SiO2≤5.05%、Fe2O3≤2.2%、Na2O+K2O≤0.3%,余量为杂质;碳化硅颗粒以质量百分比计,化学组分为:SiC≥97%,余量为杂质。
4.根据权利要求1所述的一种铸孔镶嵌锆板的镁碳质钢包滑板砖,其特征在于,所述金属铝细粉的粒级为320目,金属硅细粉的粒级为240目,N330炭黑粉的粒径为5-8μm。
5.根据权利要求1所述的一种铸孔镶嵌锆板的镁碳质钢包滑板砖,其特征在于,所述金属铝细粉以质量百分比计,化学组分为:Al≥99.0%,余量为杂质;金属硅细粉以质量百分比计,化学组分为:Si≥98.0%,余量为杂质;N330炭黑粉以质量百分比计,化学组分为:C≥99.0%,余量为杂质。
6.根据权利要求1所述的一种铸孔镶嵌锆板的镁碳质钢包滑板砖,其特征在于,所述α-氧化铝微粉的粒径为:1-5μm,α-氧化铝微粉以质量百分比计,其化学组分为:成分A:Al2O3≥98.0%,成分B:SiO2≤0.3%、Fe2O3≤0.3%、Na2O+K2O≤0.4%,余量为杂质。
7.根据权利要求1-6任一所述的一种铸孔镶嵌锆板的镁碳质钢包滑板砖的制备方法,其特征在于,具体步骤如下:
S1、按比例称取电熔镁砂细粉、废镁铬砖细粉、α-氧化铝微粉、N330炭黑粉、高温沥青粉、金属铝细粉、金属硅细粉和粘土粉共磨,混合均匀,得到共磨粉;
S2、按比例称取电熔镁砂颗粒、废镁铬砖颗粒和碳化硅颗粒,加入高速混碾机中,干混2~5min后,加入树脂结合剂,混碾2~3min,混合均匀,得到S2骨料;
S3、向S2得到的骨料中加入共磨粉,碾压30-40min后出料,压料、困料0.5小时,投入1000吨液压机压制成型,静置12h得到半成品;
S4、将步骤S3所得的半成品放入干燥窑热处理24h,进窑口温度为25-60℃,烘烤5h,温度为60-110℃,烘烤6h,温度为110-200℃烘烤13h,装窑车置入中温窑设置温度620℃保温18h,出窑拣选,得到一种铸孔镶嵌锆板的镁碳质钢包滑板砖。
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