CN111517767B - 一种钢包包底材料和由该材料制备冲击区预制块的方法 - Google Patents
一种钢包包底材料和由该材料制备冲击区预制块的方法 Download PDFInfo
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Abstract
本发明涉及耐火材料技术领域,具体涉及一种钢包包底材料和由该材料制备冲击区预制块的方法。所述钢包包底材料包含如下质量份的组分:板状刚玉30~35份、白刚玉40~50份、电熔镁砂5~10份、α‑氧化铝粉5~15份、水泥2~5份、纤维0.5~1.5份、锆复合硅微粉0.5~1.5份、铝粉0.01~0.05份、减水剂0.05~0.15份、缓凝剂0.01~0.05份。本发明制得的冲击区预制块与包底浇注料结合使用安全性高,所得预制块抗冲刷性强、热震性能好,使用寿命长,维修工作量少,有效减轻了工人的工作强度,同时节省了耐材使用量,具有较大经济效益。
Description
技术领域
本发明涉及耐火材料技术领域,尤其涉及一种钢包包底材料和由该材料制备冲击区预制块的方法。
背景技术
在冶金工业中,钢包起到承接钢水和炉外精炼的重要作用,在承接钢水过程中包底不断受到冲刷,且接钢、浇钢过程温度波动较大,包底冲击区使用环境恶劣,要求苛刻,冲击区性能直接影响到包底甚至整个钢包的使用寿命。为此,开发一种综合性能较好的钢包包底冲击区材料具有重大意义。
发明内容
本发明的目的在于提供一种钢包包底材料和由该材料制备冲击区预制块的方法,该冲击区预制块抗冲刷性强、热震性能好、使用寿命长。
为了实现上述发明目的,本发明提供以下技术方案:
本发明提供了一种钢包包底材料,包含如下质量份的组分:板状刚玉30~35份、白刚玉40~50份、电熔镁砂5~10份、α-氧化铝粉5~15份、水泥2~5份、纤维0.5~1.5份、锆复合硅微粉0.5~1.5份、铝粉0.01~0.05份、减水剂0.05~0.15份、缓凝剂0.01~0.05份。
作为优选,所述板状刚玉的组成为:粒径为3~5mm的组分与粒径为5~8mm的组分质量比为10~15:15~25。
作为优选,所述白刚玉的组成为:粒径为0~1mm的组分与粒径为1~3mm的组分的质量比为12~40:15~25。
作为优选,所述电熔镁砂的粒径为0~1mm;所述铝粉的粒径为150~250目。
作为优选,所述α-氧化铝粉的组成为:粒径为1~2μm的组分与粒径为2~4μm的组分质量比为5~10:1~5。
作为优选,所述纤维的组成为:钢纤维与聚乙烯纤维的质量比为0.5~1:0.05~0.15。
作为优选,所述减水剂为三聚磷酸钠和六偏磷酸钠中一种或两种的混合物;所述缓凝剂为柠檬酸和酒石酸中一种或两种的混合物。
本发明还提供了一种制备冲击区预制块的方法,包含如下步骤:
将所述组分和水混合,得到混合料;
将所得混合料进行成型,得到成型料;
将所述成型料进行养护处理,得到所述冲击区预制块。
作为优选,所述水与各组分的质量比为5~7:100。
作为优选,所述成型料进行养护处理后再进行烧结。
作为优选,所述烧结的温度为1500~1700℃,所述烧结的时间为2~4h。
本发明的有益效果是:由本申请提供的钢包包底材料制备的冲击区预制块中不含碳,避免了对钢水的污染。并且所得预制块与包底浇注料结合安全性高,不会出现砖缝渗钢的现象,包底冲击区预制块抗冲刷性强、热震性能好,使用寿命长,在实际工业生产中冲击区寿命达到115次以上,维修工作量少,有效减轻了工人的工作强度,节省了耐材使用量,具有较大经济效益。
具体实施方式
本发明提供了一种钢包包底材料,包含如下质量份的组分:板状刚玉30~35份、白刚玉40~50份、电熔镁砂5~10份、α-氧化铝粉5~15份、水泥2~5份、纤维0.5~1.5份、锆复合硅微粉0.5~1.5份、铝粉0.01~0.05份、减水剂0.05~0.15份、缓凝剂0.01~0.05份。
本发明提供的钢包包底材料包含板状刚玉30~35份,优选为32~33份。
在本发明中,所述板状刚玉中Al2O3含量优选大于90wt%,进一步优选大于99wt%。
在本发明中,所述板状刚玉的组成优选为:粒径为3~5mm的组分与粒径为5~8mm的组分质量比优选为10~15:15~25,进一步优选为11~14:18~22。
在本发明中,所述板状刚玉中粒径为3~5mm的组分包含粒径等于3mm的成分,不包含粒径等于5mm的成分;所述板状刚玉颗粒中粒径为5~8mm的组分包含粒径等于5mm的成分,包含粒径等于8mm的成分。
本发明提供的钢包包底材料包含白刚玉40~50份,优选为42~47份,进一步优选为44~45份。
在本发明中,所述白刚玉中Al2O3含量优选大于90wt%,进一步优选大于99wt%。
在本发明中,所述白刚玉的组成为:粒径为0~1mm的组分与粒径为1~3mm的组分的质量比优选为12~40:15~25,进一步优选为15~35:17~20。
在本发明中,所述白刚玉中粒径为0~1mm的组分不包含粒径等于1mm的成分;所述板状刚玉颗粒中粒径为1~3mm的组分包含粒径等于1mm的成分,包含粒径等于3mm的成分。
本发明提供的钢包包底材料包含电熔镁砂5~10份,优选为7~8份。
在本发明中,所述电熔镁砂中MgO的含量优选≥97.2wt%,进一步优选≥99wt%。
在本发明中,所述电熔镁砂的粒径优选为0~1mm,进一步优选为0~0.075mm。
本发明提供的钢包包底材料包含α-氧化铝粉5~15份,优选为8~10.5份。
在本发明中,所述α-氧化铝粉的组成优选为:粒径为1~2μm的组分与粒径为2~4μm的组分质量比优选为5~10:1~5,进一步优选为6~9:2~4。
在本发明中,所述α-氧化铝粉中粒径为1~2μm的组分包含粒径等于1μm的成分,不包含粒径等于2μm的成分;所述α-氧化铝粉中粒径为2~4μm的组分包含粒径等于2μm的成分,包含粒径等于4μm的成分。
本发明提供的钢包包底材料包含水泥2~5份,优选为3.8~4.2份。
本发明提供的钢包包底材料包含纤维0.5~1.5份,优选为0.6~1.1份。
在本发明中,所述纤维的组成优选为:钢纤维与聚乙烯纤维的质量比优选为0.5~1:0.05~0.15,进一步优选为0.6~0.9:0.08~0.12。
在本发明中,所述聚乙烯纤维优选高分子量聚乙烯纤维。
本发明提供的钢包包底材料包含锆复合硅微粉0.5~1.5份,优选为0.8~1.05份。
本发明提供的钢包包底材料包含铝粉0.01~0.05份,优选为0.02~0.03份。
在本发明中,所述铝粉的粒径优选为150~250目,进一步优选为170~210目,更进一步优选为180~200目。
本发明提供的钢包包底材料包含减水剂0.05~0.15份,优选为0.08~0.1份。
在本发明中,所述减水剂优选为三聚磷酸钠和六偏磷酸钠中一种或两种的混合物。
本发明提供的钢包包底材料包含缓凝剂0.01~0.05份,优选为0.02~0.03份。
在本发明中,所述缓凝剂优选为柠檬酸和酒石酸中一种或两种的混合物。
本发明还提供了一种制备冲击区预制块的方法,包含如下步骤:
将所述组分和水混合,得到混合料;
将所得混合料进行成型,得到成型料;
将所述成型料进行养护处理,得到所述冲击区预制块。
在本发明中,所述水与各组分的质量比优选为5~7:100,进一步优选为6:100,所述组分与水的混合时间优选为2~4分钟,进一步优选为3分钟。
在本发明中,所述成型优选振动机成型,所述振动机的振频优选为50~70Hz,进一步优选为60Hz;振幅优选为0.3~0.6mm,进一步优选为0.4~0.5mm;电机功率优选为3~4Kw,进一步优选为3.2Kw;振动时间优选为3~5分钟,进一步优选为4分钟。
在本发明中,所述成型料养护具体在养护窑中进行,所述成型料养护的温度优选为50~70℃,进一步优选为55~65℃,更进一步优选为58~60℃;养护的时间优选为12~36h,进一步优选为24h,养护后进行脱模处理。
在本发明中,所述成型料进行养护处理后优选再进行烧结,所述烧结可进一步地优化所得产品的性能。
在本发明中,所述烧结的温度优选为1500~1700℃,进一步优选为1600℃;所述烧结的时间优选为2~4h,进一步优选为3h。
下面结合实施例对本发明提供的一种钢包包底材料和由该材料制备冲击区预制块的方法进行详细的说明,但是不能把它们理解为对本发明保护范围的限定。
实施例1
取12份粒径为3~5mm的板状刚玉,20份粒径为5~8mm的板状刚玉,24份粒径为0~1mm的白刚玉,20份粒径为1~3mm的白刚玉,7份粒径为0~1mm的电熔镁砂,7.5份粒径为1μm的α-氧化铝粉,3份粒径为3μm的α-氧化铝粉,4.2份的水泥,1.05份的锆复合硅微粉,0.1份的聚乙烯纤维,1份的钢纤维,0.1份的三聚磷酸钠,0.02份的铝粉,0.03份的柠檬酸。将原料按设定的比例和粒度组成混合后干混3分钟,再外加5.2wt%的水搅拌5分钟,经振动机(振幅0.5mm,振频60Hz,功率3.2Kw)振动至样品表面均匀翻浆,制成40mm×40mm×160mm的标准条形试样,在60℃条件下自然养护24h后,脱模。
实施例2
取12份粒径为3~5mm的板状刚玉,22份粒径为5~8mm的板状刚玉,24份粒径为0~1mm的白刚玉,18份粒径为1~3mm的白刚玉,7份粒径为0~1mm的电熔镁砂,7.5份粒径为1μm的α-氧化铝粉,3份粒径为3μm的α-氧化铝粉,4.2份的水泥,1.05份的锆复合硅微粉,0.1份的聚乙烯纤维,1份的钢纤维,0.1份的三聚磷酸钠,0.03份的铝粉,0.02份的柠檬酸。将原料按设定的比例和粒度组成混合后干混3分钟,再外加5.2wt%的水搅拌5分钟,经振动机(振幅0.5mm,振频60Hz,功率3.2Kw)振动至样品表面均匀翻浆,制成40mm×40mm×160mm的标准条形试样,在60℃条件下自然养护24h后,脱模。
实施例3
取15份粒径为3~5mm的板状刚玉,20份粒径为5~8mm的板状刚玉,21份粒径为0~1mm的白刚玉,20份粒径为1~3mm的白刚玉,7份粒径为0~1mm的电熔镁砂,7.5份粒径为1μm的α-氧化铝粉,3份粒径为3μm的α-氧化铝粉,4.2份的水泥,1.05份的锆复合硅微粉,0.1份的聚乙烯纤维,1份的钢纤维,0.1份的三聚磷酸钠,0.02份的铝粉,0.03份的柠檬酸。将原料按设定的比例和粒度组成混合后干混3分钟,再外加5.2wt%的水搅拌5分钟,经振动机(振幅0.5mm,振频60Hz,功率3.2Kw)振动至样品表面均匀翻浆,制成40mm×40mm×160mm的标准条形试样,在60℃条件下自然养护24h后,脱模。
实施例4
取15份粒径为3~5mm的板状刚玉,20份粒径为5~8mm的板状刚玉,21份粒径为0~1mm的白刚玉,20份粒径为1~3mm的白刚玉,7份粒径为0~1mm的电熔镁砂,7.5份粒径为1μm的α-氧化铝粉,3份粒径为3μm的α-氧化铝粉,4.2份的水泥,1.05份的锆复合硅微粉,0.1份的聚乙烯纤维,1份的钢纤维,0.1份的三聚磷酸钠,0.03份的铝粉,0.02份的柠檬酸。将原料按设定的比例和粒度组成混合后干混3分钟,再外加5.2wt%的水搅拌5分钟,经振动机(振幅0.5mm,振频60Hz,功率3.2Kw)振动至样品表面均匀翻浆,制成40mm×40mm×160mm的标准条形试样,在60℃条件下自然养护24h后,脱模。
将实施例1~4的脱模后的试样放入烘箱内在110℃条件下干燥24h,并将试样在1600℃下烧结3h。所得产品理化指标如下:
实施例5
按照实施例1的原料组成混合,干混3分钟,再外加5.2wt%的水搅拌5分钟,经振动机(振幅0.5mm,振频60Hz,功率3.2Kw)振动至样品表面均匀翻浆,制成40mm×40mm×160mm的标准条形试样,在60℃条件下自然养护24h后脱模,将试样放入烘箱内在110℃下干燥24h,并将试样在1600℃下烧结3h即得到预制块,将该预制块用于钢包包底冲击区,其使用寿命可达115次。
由以上实施例可知,本发明提供了一种钢包包底材料和由该材料制备冲击区预制块的方法,冲击区材料中不含碳,避免了对钢水的污染,预制块与包底浇注料结合安全性高,不会出现砖缝渗钢的现象,包底冲击区预制块抗冲刷性强、热震性能好,使用寿命长,在实际工业生产中冲击区寿命达到115次以上,维修工作量少,有效减轻了工人的工作强度,节省了耐材使用量,具有较大经济效益。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (9)
1.一种钢包包底材料,其特征在于,包含如下质量份的组分:板状刚玉30~35份、白刚玉40~50份、电熔镁砂5~10份、α-氧化铝粉5~15份、水泥2~5份、纤维0.5~1.5份、锆复合硅微粉0.5~1.5份、铝粉0.01~0.05份、减水剂0.05~0.15份、缓凝剂0.01~0.05份;
所述α-氧化铝粉的组成为:粒径为1~2μm的组分与粒径为2~4μm的组分质量比为5~10:1~5。
2.根据权利要求1所述的钢包包底材料,其特征在于,所述板状刚玉的组成为:粒径为3~5mm的组分与粒径为5~8mm的组分质量比为10~15:15~25;所述白刚玉的组成为:粒径为0~1mm的组分与粒径为1~3mm的组分的质量比为12~40:15~25。
3.根据权利要求1所述的钢包包底材料,其特征在于,所述电熔镁砂的粒径为0~1mm;所述铝粉的粒径为150~250目。
4.根据权利要求1所述的钢包包底材料,其特征在于,所述纤维的组成为:钢纤维与聚乙烯纤维的质量比为0.5~1:0.05~0.15。
5.根据权利要求1所述的钢包包底材料,其特征在于,所述减水剂为三聚磷酸钠和六偏磷酸钠中一种或两种的混合物;所述缓凝剂为柠檬酸和酒石酸中一种或两种的混合物。
6.一种由权利要求1~5任意一项所述材料制备冲击区预制块的方法,其特征在于,包含如下步骤:
将所述组分和水混合,得到混合料;
将所得混合料进行成型,得到成型料;
将所述成型料进行养护处理,得到所述冲击区预制块。
7.根据权利要求6所述的制备方法,其特征在于,所述水与各组分的质量比为5~7:100。
8.根据权利要求7所述的制备方法,其特征在于,所述成型料进行养护处理后再进行烧结。
9.根据权利要求8所述的制备方法,其特征在于,所述烧结的温度为1500~1700℃,所述烧结的时间为2~4h。
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