CN110066166A - 一种高强高隔热耐火材料及其制备方法 - Google Patents
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Abstract
本发明提供了一种高强高隔热耐火材料,包括以下质量分数的组份,0.2~5mm的氧化铝空心球60~68%,0~0.044mm的氧化铝粉20~30%,0~0.074mm的纯铝酸钙水泥6~10%,0~0.044mm三氧化二铬粉3%,分散剂0.1~0.3%。本发明高强高隔热耐火材料,用于气化炉反应器等部位,具有荷重软化温度高、强度大,隔热性能好,使用温度最高可达1500℃,是高温特种内衬永久层的理想隔热材料。本发明还提供了一种高强高隔热耐火材料的制备方法。本发明中的分散剂由多元活性物质组成,使得耐火材料需水量极低,在广泛的工作温度范围内提供优良的流变性能。
Description
技术领域
本发明属于耐火材料领域,尤其涉及一种高强高隔热耐火材料及其制备方法。
背景技术
众所周知,热工窑炉内衬都需要耐火及隔热材料,包括各种定型耐火制品和不定形耐火材料。热工窑炉不仅要求耐高温高强度,而且也要求隔热节能,因此现阶段在结构处理上有多层、双层和单层之分。多层和单层结构的优点是多种材料分别承担耐火耐磨及隔热功能,但需两层或多层施工比较繁琐。
研究单层高强高隔热耐火材料其目的在于用一种材料、一次施工达到多种功能的要求。高强高隔热耐火材料的开发利用,使材料能够单层使用,达到多层的使用效果。
发明内容
发明目的:本发明的目的在于针对现有技术的不足,提供一种高强高隔热耐火材料及其制备方法。
本发明的创新点在于本发明中的材料即有高强的耐火作用,又有高隔热作用。
技术方案:为了达到上述发明目的,本发明具体是这样来实现的:一种高强高隔热耐火材料,包括以下质量分数的组份,0.2~5mm的氧化铝空心球60~68%,0~0.044mm的氧化铝粉20~30%,0~0.074mm的纯铝酸钙水泥6~10%,0~0.044mm三氧化二铬粉3%,分散剂0.1~0.3%。
进一步地,所述分散剂由质量分数为17~28%的木质素磺酸钠、25~30%的六偏磷酸钠,45~53%的聚丙烯酸铵混合而成。
进一步地,所述氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数≥ 99.5%。
进一步地,所述纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数≥ 68.5%。
一种高强高隔热耐火材料的制备方法,包括以下步骤:
按配方取料,取料后将分散剂和氧化铝粉在振动磨中共磨30min,制得均化粉,再将均化粉和其他组份混合得到混合料;
在混合料中加入混合料质量分数6%的水,混练均匀。
本发明的有益效果:与传统技术相比,本发明具有如下优点:
1、本发明高强高隔热耐火材料,用于气化炉反应器等部位,具有荷重软化温度高、强度大,隔热性能好,使用温度最高可达1500℃,是高温特种内衬永久层的理想隔热材料。其中氧化铝空心球是一种新型的高温隔热材料,它是用工业氧化铝在电炉中熔炼吹制而成的,晶型为a- Al2O3微晶体。以氧化铝空心球为主体,可制成各种形状制品,最高使用温度1800℃,制品机械强度高,为一般轻质制品的数倍,而体积密度仅为刚玉制品的二分之一,在各种气氛下使用都非常稳定。在石化工业气化炉、炭黑工业反应炉、冶金工业感应电炉等高温窑炉上得到广泛应用,取得了十分满意的节能效果。
2、本发明中的分散剂由多元活性物质组成,使得耐火材料需水量极低,在广泛的工作温度范围内提供优良的流变性能。
具体实施方式
实施例1:一种高强高隔热耐火材料,包括以下质量分数的组份,0.2~5mm的氧化铝空心球68%,0~0.044mm的氧化铝粉22.9%,0~0.074mm的纯铝酸钙水泥6%,0~0.044mm三氧化二铬粉3%,分散剂0.1%。分散剂由质量分数为17%的木质素磺酸钠、30%的六偏磷酸钠,53%的聚丙烯酸铵混合而成。氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数为99.5%。纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数为68.5%。
实施例2:一种高强高隔热耐火材料,包括以下质量分数的组份,0.2~5mm的氧化铝空心球66.7%,0~0.044mm的氧化铝粉20%,0~0.074mm的纯铝酸钙水泥10%,0~0.044mm三氧化二铬粉3%,分散剂0.3%。分散剂由质量分数为28%的木质素磺酸钠、25%的六偏磷酸钠, 47%的聚丙烯酸铵混合而成。氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数为99.7%。纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数为85%。
实施例3:一种高强高隔热耐火材料,包括以下质量分数的组份,0.2~5mm的的氧化铝空心球60%,0~0.044mm的氧化铝粉30%,0~0.074mm的纯铝酸钙水泥6.8%,0~0.044mm三氧化二铬粉3%,分散剂0.2%。分散剂由质量分数为25%的木质素磺酸钠、30%的六偏磷酸钠,45%的聚丙烯酸铵混合而成。氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数为100%。纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数为100%。
实施例4:一种高强高隔热耐火材料的制备方法,包括以下步骤:按以下质量分数的组份取料,0.2~5mm的氧化铝空心球68%,0~0.044mm的氧化铝粉22.9%,0~0.074mm的纯铝酸钙水泥6%,0~0.044mm三氧化二铬粉3%,分散剂0.1%。分散剂由质量分数为17%的木质素磺酸钠、30%的六偏磷酸钠, 53%的聚丙烯酸铵混合而成。氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数为99.5%。纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数为68.5%。取料后将分散剂和氧化铝粉在振动磨中共磨30min,制得均化粉,再将均化粉和其他组份混合得到混合料;在混合料中加入混合料质量分数6%的水,混练均匀。
实施例5:一种高强高隔热耐火材料的制备方法,包括以下步骤:按以下质量分数的组份取料, 0.2~5mm的氧化铝空心球66.7%,0~0.044mm的氧化铝粉20%,0~0.074mm的纯铝酸钙水泥10%,0~0.044mm三氧化二铬粉3%,分散剂0.3%。分散剂由质量分数为28%的木质素磺酸钠、25%的六偏磷酸钠, 47%的聚丙烯酸铵混合而成。氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数为99.7%。纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数为85%。取料后将分散剂和氧化铝粉在振动磨中共磨30min,制得均化粉,再将均化粉和其他组份混合得到混合料;在混合料中加入混合料质量分数6%的水,混练均匀。
实施例6:一种高强高隔热耐火材料的制备方法,包括以下步骤:按以下质量分数的组份取料, 0.2~5mm的的氧化铝空心球60%,0~0.044mm的氧化铝粉30%,0~0.074mm的纯铝酸钙水泥6.8%,0~0.044mm三氧化二铬粉3%,分散剂0.2%。分散剂由质量分数为25%的木质素磺酸钠、30%的六偏磷酸钠, 45%的聚丙烯酸铵混合而成。氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数为100%。纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数为100%。取料后将分散剂和氧化铝粉在振动磨中共磨30min,制得均化粉,再将均化粉和其他组份混合得到混合料;在混合料中加入混合料质量分数6%的水,混练均匀。
实施例1的产品参数:
实施例2的产品参数:
实施例3的产品参数:
Claims (5)
1.一种高强高隔热耐火材料,其特征在于,包括以下质量分数的组份,0.2~5mm的氧化铝空心球60~68%,0~0.044mm的氧化铝粉20~30%,0~0.074mm的纯铝酸钙水泥6~10%,0~0.044mm三氧化二铬粉3%,分散剂0.1~0.3%。
2.根据权利要求1所述的高强高隔热耐火材料,其特征在于,所述分散剂由质量分数为17~28%的木质素磺酸钠、25~30%的六偏磷酸钠,45~53%的聚丙烯酸铵混合而成。
3.根据权利要求1所述的高强高隔热耐火材料,其特征在于,所述氧化铝粉的体积密度≥ 3.50g/cm3,氧化铝粉中Al2O3 的质量分数≥ 99.5%。
4.根据权利要求1所述的高强高隔热耐火材料,其特征在于,所述纯铝酸钙水泥的松散密度为1.04g/cm3,比重为3.0g/cm3,耐火度为1600℃,纯铝酸钙水泥中Al2O3 的质量分数≥68.5%。
5.一种高强高隔热耐火材料的制备方法,其特征在于,包括以下步骤:
(1)按配方取料,取料后将分散剂和氧化铝粉在振动磨中共磨30min,制得均化粉,再将均化粉和其他组份混合得到混合料;
(2)在混合料中加入混合料质量分数6%的水,混练均匀。
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