CN108530089B - 用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴 - Google Patents

用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴 Download PDF

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CN108530089B
CN108530089B CN201710122224.3A CN201710122224A CN108530089B CN 108530089 B CN108530089 B CN 108530089B CN 201710122224 A CN201710122224 A CN 201710122224A CN 108530089 B CN108530089 B CN 108530089B
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朱永军
贾鸿明
侯志昌
赵红波
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Abstract

本发明提供一种用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴,所述耐火浇注料按质量百分比计,包括以下组分:50%~85%的莫来石骨料、2%~10%的纯铝酸钙水泥、10%~25%的氧化铝微粉、2%~10%的氧化硅微粉及1%~5%的不锈钢钢纤维。所述耐火浇注料具有体积密度高、气孔率低、耐火度高、耐高温气体冲刷、耐压耐磨性能好及热震性能好等优点;使用所述耐火浇注料的所述中间包烘烤烧嘴使用寿命更长,在使用过程中不会出现裂纹、整块脱落及表面起斑后陆续脱落等现象,减少了烧嘴备件的更换频率,延长检修周期,节约了成本,更好的保证了连铸的正常生产。

Description

用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴
技术领域
本发明属于材料技术领域,具体涉及一种低成本的用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴。
背景技术
现代连铸生产要求中间包预热工艺在90分钟、120分钟、180分钟分别从常温烘烤至1150℃左右,采用蓄热式燃烧技术后,烧嘴的结构发生了根本的变化,见本申请人专利201520652177X蓄热式快烘烧嘴。作为烧嘴的关键部位,对中间包烘烤烧嘴的浇筑耐材提出了更高要求。蓄热式烧嘴因为烘烤温度高(燃烧室温度达到1700℃);气流较强(高速烧嘴喷口达到50~70m/s),冲刷严重;特别是冷热交替频繁,蓄热燃烧换向频率15~30秒,烧嘴燃烧室温度从常温~1700℃交替。目前蓄热式烧嘴耐材很容易出现裂纹、整块脱落、表面起斑后陆续脱落等现象,烧嘴备件更换频繁,运维成本增加;同时,脱落的耐材直接掉进中间包包体内,因为目前水口烘烤多采用引射预热,脱落的耐材极易堵塞水口,造成水口预热温度低,浇钢时水口折断,严重时甚至影响到连铸的正常生产。
发明内容
鉴于以上所述现有技术的缺点,本发明的目的在于提供一种用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴,用于解决现有技术中由于用于中间包烘烤烧嘴的耐火浇注料耐压及热稳定性较差而导致的中间包烘烤烧嘴容易出现裂纹、整块脱落、表面起斑后陆续脱落等显现,从而造成烧嘴报废,甚至影响连铸的正常生产的问题。
为实现上述目的及其他相关目的,本发明提供一种用于中间包烘烤烧嘴的耐火浇注料,所述耐火浇注料按质量百分比计,包括以下组分:50%~85%的莫来石骨料、2%~10%的纯铝酸钙水泥、10%~25%的氧化铝微粉、2%~10%的氧化硅微粉及1%~5%的不锈钢钢纤维。
作为本发明的耐火浇注料的一种优选方案,所述莫来石骨料按质量百分比计,包括以下组分:65%~75%的Al2O3、25%~35%的SiO2
作为本发明的耐火浇注料的一种优选方案,所述莫来石骨料的耐火度大于1750℃。
作为本发明的耐火浇注料的一种优选方案,所述纯铝酸钙水泥按质量百分比计,包括以下组分:65%~75%的CaO及25%~35%的Al2O3
作为本发明的耐火浇注料的一种优选方案,所述氧化铝粉的纯度大于等于99%,所述氧化铝粉的粒径小于等于3μm。
作为本发明的耐火浇注料的一种优选方案,所述氧化硅粉的纯度大于等于93%,所述氧化硅粉的粒径小于1μm。
作为本发明的耐火浇注料的一种优选方案,所述耐火浇注料的体积密度为2.7g/cm3~2.8g/cm3、气孔率小于18%、耐火度大于1650℃、热震受热端面破损率P=(50±5)%时次数为110。
本发明还提供一种中间包烘烤烧嘴,所述中间包烘烤烧嘴由上述任一方案中所述的耐火浇注料浇注而成。
如上所述,本发明的用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴,所述耐火浇注料按质量百分比计,包括以下组分:50%~85%的莫来石骨料、2%~10%的纯铝酸钙水泥、10%~25%的氧化铝微粉、2%~10%的氧化硅微粉及1%~5%的不锈钢钢纤维;所述耐火浇注料具有体积密度高、气孔率低、耐火度高、耐高温气体冲刷、耐压耐磨性能好及热震性能好等优点;使用所述耐火浇注料的所述中间包烘烤烧嘴性能好,使用寿命更长,在使用过程中不会出现裂纹、整块脱落及表面起斑后陆续脱落等现象,减少了烧嘴备件的更换频率,延长检修周期,节约了成本,更好的保证了连铸的正常生产。
具体实施方式
以下通过特定的具体实例说明本发明的实施方式,本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用,本说明书中的各项细节也可以基于不同观点与应用,在没有背离本发明的精神下进行各种修饰或改变。
实施例一
本实施例提供一种用于中间包烘烤烧嘴的耐火浇注料,所述耐火浇注料按质量百分比计,包括以下组分:50%~85%的莫来石骨料、2%~10%的纯铝酸钙水泥、10%~25%的氧化铝微粉、2%~10%的氧化硅微粉及1%~5%的不锈钢钢纤维。
作为示例,所述耐火浇注料中,所述莫来石骨料的质量百分比可以为50%、55%、60%、65%、70%、75%、80%或85%;所述纯铝酸钙水泥的质量百分比可以为2%、3%、4%、5%、6%、7%、8%、9%或10%;所述氧化铝微粉的质量百分比可以为10%、15%、20%或25%;所述氧化硅微粉的质量百分比可以为2%、3%、4%、5%、6%、7%、8%、9%或10%;所述不锈钢钢纤维的质量百分比可以为:1%、2%、3%、4%或5%。所述耐火浇注料中,在满足各组分的质量百分比之和为100%的前提下,所述耐火浇注料可以为上述任一质量百分比的所述莫来石骨料、所述纯铝酸钙水泥、所述氧化铝微粉、所述氧化硅微粉及所述不锈钢钢纤维的组合。
作为示例,所述莫来石骨料按质量百分比计,包括以下组分:65%~75%的Al2O3、25%~35%的SiO2
作为示例,所述莫来石骨料中,Al2O3的质量百分比可以为65%、70%或75%;SiO2的质量百分比可以为25%、30%或35%。
作为示例,所述莫来石骨料的耐火度大于1750℃。
作为示例,所述纯铝酸钙水泥按质量百分比计,包括以下组分:65%~75%的CaO及25%~35%的Al2O3
作为示例,所述纯铝酸钙水泥中,CaO的质量百分比可以为65%、70%或75%;Al2O3的质量百分比可以为25%、30%或35%。
作为示例,所述氧化铝粉的纯度大于等于99%,所述氧化铝粉的粒径小于等于3μm;优选地,本实施例中,所述氧化铝粉的纯度大于等于99.9%,所述氧化铝粉的粒径小于1μm。
作为示例,所述氧化硅粉的纯度大于等于93%,所述氧化硅粉的粒径小于1μm;优选地,本实施例中,所述氧化铝粉的纯度大于等于99%。
作为示例,所述耐火浇注料的体积密度为2.7g/cm3~2.8g/cm3、气孔率小于18%、耐火度大于1650℃、热震受热端面破损率P=(50±5)%时次数为110。
本实施例中的所述耐火浇注料具有体积密度高、气孔率低、耐火度高、耐高温气体冲刷、耐压耐磨性能好及热震性能好等优点。
实施例二
本实施例提供一种中间包烘烤烧嘴,所述中间包烘烤烧嘴由实施例一中所述的耐火浇注料浇注而成。所述耐火浇注料的具体组分特征详见实施例一,此处不再累述。本实施例中的所述中间包烘烤烧嘴性能好,使用寿命更长,在使用过程中不会出现裂纹、整块脱落及表面起斑后陆续脱落等现象,减少了烧嘴备件的更换频率,延长检修周期,节约了成本,更好的保证了连铸的正常生产。
如上所述,本发明的用于中间包烘烤烧嘴的耐火浇注料及中间包烘烤烧嘴,所述耐火浇注料按质量百分比计,包括以下组分:50%~85%的莫来石骨料、2%~10%的纯铝酸钙水泥、10%~25%的氧化铝微粉、2%~10%的氧化硅微粉及1%~5%的不锈钢钢纤维。所述耐火浇注料具有体积密度高、气孔率低、耐火度高、耐高温气体冲刷、耐压耐磨性能好及热震性能好等优点;使用所述耐火浇注料的所述中间包烘烤烧嘴性能好,使用寿命更长,在使用过程中不会出现裂纹、整块脱落及表面起斑后陆续脱落等现象,减少了烧嘴备件的更换频率,延长检修周期,节约了成本,更好的保证了连铸的正常生产。
上述实施例仅例示性说明本发明的原理及其功效,而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下,对上述实施例进行修饰或改变。因此,举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变,仍应由本发明的权利要求所涵盖。

Claims (5)

1.一种用于中间包烘烤烧嘴的耐火浇注料,其特征在于,所述耐火浇注料按质量百分比计,包括以下组分:50%~85%的莫来石骨料、2%~10%的纯铝酸钙水泥、10%~25%的氧化铝微粉、2%~10%的氧化硅微粉及1%~5%的不锈钢钢纤维,所述氧化铝微粉的纯度大于等于99%,所述氧化铝微粉的粒径小于等于3μm,所述氧化硅微粉的纯度大于等于93%,所述氧化硅微粉的粒径小于1μm,所述耐火浇注料的体积密度为2.7g/cm3~2.8g/cm3、气孔率小于18%、耐火度大于1650℃、热震受热端面破损率P=(50±5)%时次数为110。
2.根据权利要求1所述的耐火浇注料,其特征在于:所述莫来石骨料按质量百分比计,包括以下组分:65%~75%的Al2O3、25%~35%的SiO2
3.根据权利要求2所述的耐火浇注料,其特征在于:所述莫来石骨料的耐火度大于1750℃。
4.根据权利要求1所述的耐火浇注料,其特征在于:所述纯铝酸钙水泥按质量百分比计,包括以下组分:65%~75%的CaO及25%~35%的Al2O3
5.一种中间包烘烤烧嘴,其特征在于,所述中间包烘烤烧嘴由如权利要求1至4中任一项所述的耐火浇注料浇注而成。
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