CN110922167A - 一种添加稀土氧化物的镁碳砖 - Google Patents

一种添加稀土氧化物的镁碳砖 Download PDF

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CN110922167A
CN110922167A CN201911236266.5A CN201911236266A CN110922167A CN 110922167 A CN110922167 A CN 110922167A CN 201911236266 A CN201911236266 A CN 201911236266A CN 110922167 A CN110922167 A CN 110922167A
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magnesia
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曹丽云
俞晓东
龚育才
彭仁
茹红强
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Abstract

本发明提供一种添加稀土氧化物的镁碳砖,包括以下组份,各组分按重量份数计为:电熔镁砂颗粒40~50份、所述电熔镁砂细粉20~30,烧结尖晶石细粉20~30份、氧化镧细粉1~5份、氧化铽细粉1~5份、酚醛树脂1~5份、乌洛托品0.5~2.5份。通过本发明,以解决现有技术存在的镁碳砖抗侵蚀性差的问题。

Description

一种添加稀土氧化物的镁碳砖
技术领域
本发明涉及一种镁碳砖,具体涉及一种添加稀土氧化物的镁碳砖。
背景技术
镁碳砖是以高熔点碱性氧化物氧化镁(熔点2800℃)和难以被炉渣侵润的高熔点碳素材料作为原料,添加各种非氧化物添加剂,用炭质结合剂结合而成的不烧炭复合耐火材料。镁碳砖广泛应用于炼钢高炉、电炉、转炉、精炼炉连铸系统和钢包的内衬部位。
镁碳砖作为一种复合耐火材料,有效地利用了镁砂的抗渣侵蚀能力强和碳的高导热性及低膨胀性,补偿了镁砂耐剥落性差的最大缺点。随着生产技术的不断发展和提高,对于耐火材料的要求也不断增加,提高镁碳砖的使用寿命及应用性能是大家一直研究的方向,而提高镁碳砖的抗侵蚀性是技术中的关键。
发明内容
本发明提供一种添加稀土氧化物的镁碳砖,以解决现有技术存在的镁碳砖抗侵蚀性差的问题。
为解决上述技术问题,本发明提供一种添加稀土氧化物的镁碳砖,包括以下组份,各组分按重量份数计为:电熔镁砂颗粒40~50份、所述电熔镁砂细粉20~30,烧结尖晶石细粉 20~30份、氧化镧细粉1~5份、氧化铽细粉1~5份、酚醛树脂1~5份、乌洛托品0.5~2.5份。
进一步的,所述电熔镁砂颗粒包括三种粒度的镁砂颗粒,三种粒度分别为5~3mm、3~1 mm、≤1mm。
进一步的,所述电熔镁砂细粉的粒度为≤0.088mm。
进一步的,所述烧结尖晶石细粉的粒度为≤0.088mm。
进一步的,所述氧化镧细粉以及氧化铽细粉的粒度为≤0.088mm,纯度≥99.0%。
进一步的,所述电熔镁砂颗粒的重量份数为45份,所述电熔镁砂细粉的重量份数为25 份,所述烧结尖晶石细粉的重量份数为20份、所述氧化镧细粉的重量份数为3份、所述氧化铽细粉的重量份数为3份,所述酚醛树脂的重量份数为2.7份,所述乌洛托品的重量份数为 1.3份。
本发明带来的有益效果:本发明提供一种添加稀土氧化物的镁碳砖,在原料中加入稀土氧化物能够提高镁碳砖的抗侵蚀性,进而满足特钢冶炼的要求,满足镁碳砖的优异性能。
稀土氧化物熔点高,化学活性大,有较好的抗侵蚀能力。稀土氧化物在镁碳砖使用过程中能促进合成镁铝尖晶石,加入稀土氧化物氧化镧和氧化铽,能形成复杂氧化物,能使氧化镁晶格发生改变,有利于氧化镁晶粒发育长大,从而促进了镁铝尖晶石的烧结致密化,提高镁碳砖的抗侵蚀性。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚,以下结合具体实施例,对本发明作进一步地详细说明。
本发明提供一种添加稀土氧化物的镁碳砖,包括以下组份,各组分按重量份数计为:电熔镁砂颗粒40~50份、所述电熔镁砂细粉20~30,烧结尖晶石细粉20~30份、氧化镧细粉 1~5份、氧化铽细粉1~5份、酚醛树脂1~5份、乌洛托品0.5~2.5份。
在本实施例中,所述电熔镁砂颗粒包括三种粒度的镁砂颗粒,三种粒度分别为5~3mm、 3~1mm、≤1mm。所述电熔镁砂细粉的粒度为≤0.088mm。所述烧结尖晶石细粉的粒度为≤0.088mm。所述氧化镧细粉以及氧化铽细粉的粒度为≤0.088mm,纯度≥99.0%。
优选的,本实施例中,所述电熔镁砂颗粒的重量份数为45份,所述电熔镁砂细粉的重量份数为25份,所述烧结尖晶石细粉的重量份数为20份、所述氧化镧细粉的重量份数为3份、所述氧化铽细粉的重量份数为3份,所述酚醛树脂的重量份数为2.7份,所述乌洛托品的重量份数为1.3。电熔镁砂的粒度分布见下表1。
表1电熔镁砂的粒度分布
Figure RE-GDA0002374202640000021
将上述原料按比例称量后充分混炼,放入模具中,然后对其进行压制成型,成型后的砖坯放入窑道中烘烤,从窑道中取出后即为成品镁碳砖。
本发明提供一种添加稀土氧化物的镁碳砖,在原料中加入稀土氧化物,具体来说,本实施例在镁碳砖中引入稀土氧化物氧化镧和氧化铽,稀土氧化物熔点高,化学活性大,有较好的抗侵蚀能力。稀土氧化物在镁碳砖使用过程中能促进合成镁铝尖晶石,加入稀土氧化物氧化镧和氧化铽,能形成复杂氧化物,能使氧化镁晶格发生改变,有利于氧化镁晶粒发育长大,从而促进了镁铝尖晶石的烧结致密化,提高镁碳砖的抗侵蚀性。
综上所述,本发明提供一种添加稀土氧化物的镁碳砖,在原料中加入稀土氧化物,提高了镁碳砖的抗氧化性,从而提高镁碳砖的使用寿命,进而满足特钢冶炼的要求,满足镁碳砖的优异性能。
以上所述仅为本发明的实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的权利要求范围之内。

Claims (6)

1.一种添加稀土氧化物的镁碳砖,其特征在于,包括以下组份,各组分按重量份数计为:电熔镁砂颗粒40~50份、电熔镁砂细粉20~30,烧结尖晶石细粉20~30份、氧化镧细粉1~5份、氧化铽细粉1~5份、酚醛树脂1~5份、乌洛托品0.5~2.5份。
2.如权利要求1所述的添加稀土氧化物的镁碳砖,其特征在于,所述电熔镁砂颗粒包括三种粒度的镁砂颗粒,三种粒度分别为5~3mm、3~1mm、≤1mm。
3.如权利要求1所述的添加稀土氧化物的镁碳砖,其特征在于,所述电熔镁砂细粉的粒度为≤0.088mm。
4.如权利要求1所述的添加稀土氧化物的镁碳砖,其特征在于,所述烧结尖晶石细粉的粒度为≤0.088mm。
5.如权利要求1所述的添加稀土氧化物的镁碳砖,其特征在于,所述氧化镧细粉以及氧化铽细粉的粒度为≤0.088mm,纯度≥99.0%。
6.如权利要求1所述的添加稀土氧化物的镁碳砖,其特征在于,所述电熔镁砂颗粒的重量份数为45份,所述电熔镁砂细粉的重量份数为25份,所述烧结尖晶石细粉的重量份数为20份、所述氧化镧细粉的重量份数为3份、所述氧化铽细粉的重量份数为3份,所述酚醛树脂的重量份数为2.7份,所述乌洛托品的重量份数为1.3份。
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CN112897992A (zh) * 2021-01-29 2021-06-04 鞍山市和丰耐火材料有限公司 一种rh浸渍管与环流管用高温处理镁碳砖及其制备方法
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CN112479684A (zh) * 2020-11-27 2021-03-12 云南濮耐昆钢高温材料有限公司 一种电弧炉炉壁热点区用镁碳砖
CN112390654A (zh) * 2020-11-30 2021-02-23 邯郸市翰润达耐火材料有限公司 一种耐火材料及其制备方法和应用
CN112897992A (zh) * 2021-01-29 2021-06-04 鞍山市和丰耐火材料有限公司 一种rh浸渍管与环流管用高温处理镁碳砖及其制备方法
CN113248233A (zh) * 2021-04-29 2021-08-13 海城利尔麦格西塔材料有限公司 一种镁碳砖的制备方法
CN114671668A (zh) * 2022-03-11 2022-06-28 钢铁研究总院有限公司 一种稀土钢冶炼用钢包耐火材料及其制作方法

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