CN105819880A - 一种铝碳质布流水口及其制备方法 - Google Patents

一种铝碳质布流水口及其制备方法 Download PDF

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CN105819880A
CN105819880A CN201610303418.9A CN201610303418A CN105819880A CN 105819880 A CN105819880 A CN 105819880A CN 201610303418 A CN201610303418 A CN 201610303418A CN 105819880 A CN105819880 A CN 105819880A
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flowing water
aluminum
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祝洪喜
骆中汉
邓承继
余超
员文杰
丁军
朱清友
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Abstract

本发明涉及一种铝碳质布流水口及其制备方法。其技术方案是:以45~55wt%的髙铝质原料大颗粒、15~25wt%的髙铝质原料小颗粒、22~28wt%的髙铝质原料细粉和6~12wt%的鳞片石墨为混合料,外加所述混合料4~8wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。然后将所述混合泥料加入模具中,机械成型,制得铝碳质布流水口坯,将所述铝碳质布流水口坯在180~240℃条件下保温8~12小时,制得铝碳质布流水口。本发明具有耐高温性能好、抗热震性能优良、抗高温液态金属的侵蚀性优异和布流效果良好的特点,所制备的铝碳质布流水口满足双辊薄带坯连铸技术的使用要求。

Description

一种铝碳质布流水口及其制备方法
技术领域
本发明属于布流水口技术领域。具体涉及一种铝碳质布流水口及其制备方法。
背景技术
双辊薄带坯连铸技术是将液态金属直接浇注到两个反向旋转的水冷结晶辊和布流水口(耐火材料)构成的熔池内,通过水冷结晶辊的快速冷却(冷却速率在10~1000℃/s之间)和轧制作用获得1~5mm厚的薄带。与传统的大板坯连铸和薄板坯连铸工艺相比,双辊薄带连铸技术除了通过简化工序能够大幅度降低基建和设备投资、能源消耗和减少环境污染外,其独特的亚快速凝固过程能够使所铸材料在微观结构上发生显著变化,如晶粒得到细化、减少成分偏析、抑制第二相的析出等,可大大改善金属材料的性能。因此,双辊薄带连铸技术已成为当今世界新材料和近终成形研究的热点,并取得了巨大的进展。近年来,我国有关单位也加大了该技术的研发力度,已经从实验室研究进入中试和小规模试生产阶段。
布流水口是将液态金属直接均匀布流到两个反向旋转的水冷结晶辊和布流水口(耐火材料)构成的熔池内、以保障双辊薄带坯连铸工艺正常进行的关键耐火构件,要求其耐高温、抗热震性能好,抗高温液态金属的冲刷和侵蚀性好,能均匀布流液态金属。但是,相对于冶金领域新发展的双辊薄带坯连铸技术而言,耐火材料方面还没有与之配套的布流水口等关键耐火构件。
发明内容
本发明目的在于提供一种耐高温性能好、抗热震性能优良、抗高温液态金属的侵蚀性优异和布流效果良好的铝碳质布流水口及其制备方法,能满足双辊薄带坯连铸技术的使用要求。
为实现上述任务,本发明采用的技术方案是:以45~55wt%的髙铝质原料大颗粒、15~25wt%的髙铝质原料小颗粒、22~28wt%的髙铝质原料细粉和6~12wt%的鳞片石墨为混合料,外加所述混合料4~8wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得铝碳质布流水口坯,将所述铝碳质布流水口坯在180~240℃条件下保温8~12小时,制得铝碳质布流水口。
所述髙铝质原料大颗粒为特级铝矾土熟料大颗粒、刚玉大颗粒和莫来石大颗粒中的一种,所述髙铝质原料大颗粒的粒度为3~1mm;所述髙铝质原料小颗粒为特级铝矾土熟料小颗粒、刚玉小颗粒和莫来石小颗粒中的一种,所述髙铝质原料小颗粒的粒度≤1mm;所述髙铝质原料细粉为特级铝矾土熟料细粉、刚玉细粉和莫来石细粉中的一种,所述髙铝质原料细粉的粒度≤0.088mm。
所述鳞片石墨的C含量≥92%,粒度≤0.15mm。
所述机械成型是采用耐火材料振动成型机进行的机械振动成型。
所述铝碳质布流水口为狭缝式铝碳质布流水口或排孔式铝碳质布流水口。
由于采用上述技术方案,本发明具有如下积极效果:
本发明采用的铝碳质原料耐高温性能好,加入鳞片石墨提高了制品抗高温液态金属侵蚀的性能和导热性,制备的铝碳质布流水口具有优良的抗热震性能。
本发明采用狭缝式或排孔式的良好布流结构,为注入水冷双辊中间熔池高温液态金属的成分均匀化提供了保障作用,有利于提高薄带连铸坯的质量,故所制备的铝碳质布流水口能满足双辊薄带坯连铸技术的使用要求。
因此,本发明具有耐高温性能好、抗热震性能优良、抗高温液态金属的侵蚀性优异和布流效果良好的特点,所制备的铝碳质布流水口满足双辊薄带坯连铸技术的使用要求。
具体实施方式
下面结合具体实施方式,对本发明做进一步的描述,并非对保护范围的限制。
本具体实施方式中:
所述髙铝质原料大颗粒为特级铝矾土熟料大颗粒、刚玉大颗粒和莫来石大颗粒中的一种,所述髙铝质原料大颗粒的粒度为3~1mm;所述髙铝质原料小颗粒为特级铝矾土熟料小颗粒、刚玉小颗粒和莫来石小颗粒中的一种,所述髙铝质原料小颗粒的粒度≤1mm;所述髙铝质原料细粉为特级铝矾土熟料细粉、刚玉细粉和莫来石细粉中的一种,所述髙铝质原料细粉的粒度≤0.088mm。
所述鳞片石墨的C含量≥92%,粒度≤0.15mm。
所述机械成型是采用耐火材料振动成型机进行的机械振动成型。
实施例中不再赘述。
实施例1
一种铝碳质布流水口及其制备方法。以45~50wt%的刚玉大颗粒、20~25wt%的刚玉小颗粒、22~26wt%的刚玉细粉和6~8wt%的鳞片石墨为混合料,外加所述混合料4~6wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得排孔式铝碳质布流水口坯,将所述排孔式铝碳质布流水口坯在180~220℃条件下保温10~12小时,制得排孔式铝碳质布流水口。
实施例2
一种铝碳质布流水口及其制备方法。以50~55wt%的莫来石大颗粒、15~20wt%的莫来石小颗粒、22~26wt%的莫来石细粉和8~10wt%的鳞片石墨为混合料,外加所述混合料5~7wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得狭缝式铝碳质布流水口坯,将所述狭缝式铝碳质布流水口坯在200~240℃条件下保温8~10小时,制得狭缝式铝碳质布流水口。
实施例3
一种铝碳质布流水口及其制备方法。以50~55wt%的特级铝矾土熟料大颗粒、15~20wt%的莫来石小颗粒、24~28wt%的刚玉熟料细粉和6~8wt%的鳞片石墨为混合料,外加所述混合料6~8wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得排孔式铝碳质布流水口坯,将所述排孔式铝碳质布流水口坯在200~240℃条件下保温8~10小时,制得排孔式铝碳质布流水口。
实施例4
一种铝碳质布流水口及其制备方法。以50~55wt%的特级铝矾土熟料大颗粒、15~20wt%的特级铝矾土熟料小颗粒、22~26wt%的特级铝矾土熟料细粉和8~12wt%的鳞片石墨为混合料,外加所述混合料6~8wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得狭缝式铝碳质布流水口坯,将所述狭缝式铝碳质布流水口坯在200~240℃条件下保温8~10小时,制得狭缝式铝碳质布流水口。
实施例5
一种铝碳质布流水口及其制备方法。以50~55wt%的刚玉颗粒、15~20wt%的特级铝矾土熟料小颗粒、24~28wt%的莫来石细粉和6~8wt%的鳞片石墨为混合料,外加所述混合料5~7wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得排孔式铝碳质布流水口坯,将所述排孔式铝碳质布流水口坯在180~220℃条件下保温10~12小时,制得排孔式铝碳质布流水口。
实施例6
一种铝碳质布流水口及其制备方法。以45~50wt%的莫来石大颗粒、20~25wt%的刚玉小颗粒、22~26wt%的特级铝矾土熟料细粉和6~8wt%的鳞片石墨为基本配料,外加所述配料4~6wt%的酚醛树脂,再将所述配料和酚醛树脂加入混料机中混练,得到混合泥料。
将所述混合泥料加入模具中,机械成型,制得排孔式铝碳质布流水口坯,将所述排孔式铝碳质布流水口坯在180~220℃条件下保温10~12小时,制得排孔式铝碳质布流水口。
本具体实施方式具有如下积极效果:
本具体实施方式采用的铝碳质原料耐高温性能好,加入鳞片石墨提高了制品抗高温液态金属侵蚀的性能和导热性,制备的铝碳质布流水口具有优良的抗热震性能。
本具体实施方式采用狭缝式或排孔式的良好布流结构,为注入水冷双辊中间熔池高温液态金属的成分均匀化提供了保障作用,有利于提高薄带连铸坯的质量,故所制备的铝碳质布流水口能满足双辊薄带坯连铸技术的使用要求。
因此,本具体实施方式具有耐高温性能好、抗热震性能优良、抗高温液态金属的侵蚀性优异和布流效果良好的特点,所制备的铝碳质布流水口满足双辊薄带坯连铸技术的使用要求。

Claims (5)

1.一种铝碳质布流水口的制备方法,其特征在于:以45~55wt%的髙铝质原料大颗粒、15~25wt%的髙铝质原料小颗粒、22~28wt%的髙铝质原料细粉和6~12wt%的鳞片石墨为混合料,外加所述混合料4~8wt%的酚醛树脂,再将所述混合料和酚醛树脂加入混料机中混练,得到混合泥料;
将所述混合泥料加入模具中,机械成型,制得铝碳质布流水口坯,将所述铝碳质布流水口坯在180~240℃条件下保温8~12小时,制得铝碳质布流水口;
所述髙铝质原料大颗粒为特级铝矾土熟料大颗粒、刚玉大颗粒和莫来石大颗粒中的一种,所述髙铝质原料大颗粒的粒度为3~1mm;所述髙铝质原料小颗粒为特级铝矾土熟料小颗粒、刚玉小颗粒和莫来石小颗粒中的一种,所述髙铝质原料小颗粒的粒度≤1mm;所述髙铝质原料细粉为特级铝矾土熟料细粉、刚玉细粉和莫来石细粉中的一种,所述髙铝质原料细粉的粒度≤0.088mm。
2.根据权利要求1所述的铝碳质布流水口的制备方法,其特征在于所述鳞片石墨的C含量≥92%,粒度≤0.15mm。
3.根据权利要求1所述的铝碳质布流水口的制备方法,其特征在于所述机械成型是采用耐火材料振动成型机进行的机械振动成型。
4.根据权利要求1所述的铝碳质布流水口的制备方法,其特征在于所述铝碳质布流水口为狭缝式铝碳质布流水口或排孔式铝碳质布流水口。
5.一种铝碳质布流水口,其特征在于所述铝碳质布流水口是根据权利要求1~4项中任一项所述铝碳质布流水口的制备方法所制备的铝碳质布流水口。
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CN107162606A (zh) * 2017-05-02 2017-09-15 长兴县煤山工业炉料有限公司 一种勾缝用不定形耐火材料的制备方法
CN107176841A (zh) * 2017-05-02 2017-09-19 长兴县煤山工业炉料有限公司 一种勾缝用不定形耐火材料
CN111470855A (zh) * 2020-04-21 2020-07-31 北京瑞普同创科技发展有限公司 一种抗钢水冲刷的中间包冲击板及其制备方法和施工方法
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