CN112321284A - 一种炼铁高炉用铝钛复合耐火浇注料 - Google Patents

一种炼铁高炉用铝钛复合耐火浇注料 Download PDF

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CN112321284A
CN112321284A CN202011168607.2A CN202011168607A CN112321284A CN 112321284 A CN112321284 A CN 112321284A CN 202011168607 A CN202011168607 A CN 202011168607A CN 112321284 A CN112321284 A CN 112321284A
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blast furnace
aluminum
iron
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徐瑞图
孙加林
徐潇晗
何汝生
曹永国
吴敏
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Beijing Ruier Nonmetal Materials Co ltd
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Abstract

本发明公开一种炼铁高炉用铝钛复合耐火浇注料,属于炼铁高炉用耐火材料领域。本发明的铝钛复合耐火浇注料可以采用浇注或者湿法喷涂的方式施工,可用于浇注高炉炉缸陶瓷杯、铁口和风口内衬、还可以浇注冷却壁工作端、浇制风口以上的耐火内衬等;也可以采用湿法喷涂方式进行高炉喷涂造衬。在炼铁高炉特定的含碳、富氮和缺氧的还原性气氛下,本浇注料表面的氧化钛组分将被还原成金属钛进而形成覆盖在制品表面的碳氮化钛,这些高硬度、高熔点的碳氮化钛提高了制品的耐磨性和耐侵蚀性能,而且,在高炉特定气氛下,浇注料表面的碳氮化钛覆盖层可以在被侵蚀后不断新生,从而延长炉衬的使用周期,更好地保护冷却设备、炉壳等装置,进而延长高炉寿命。

Description

一种炼铁高炉用铝钛复合耐火浇注料
技术领域
本发明属于炼铁高炉用耐火材料领域,具体涉及一种炼铁高炉用铝钛复合耐火浇注料。
背景技术
炼铁高炉的内衬目前采用的耐火浇注料主要有刚玉质、刚玉-碳化硅质、ASC耐火浇注料等,使用范围主要用于炉缸内衬、铁口区域、风口区域、冷却壁工作端浇注和炉腹、炉腰以及炉身中上部等部位的湿法喷涂等等。
高炉内的耐火炉衬处于存在熔融渣铁和充满高温、高压和高流速煤气等的工作环境。炉腹部位的工作环境中还存在着初生铁以及初成渣等对耐火材料极具侵蚀性的不利因素。高炉冶炼过程中,熔融渣铁和高速煤气流等接触到这些耐火炉衬的工作面时,将对耐火材料产生化学侵蚀和机械冲刷。由于构成这些耐火炉衬材料的氧化物和非氧化物不能在高炉炉内气氛下形成有益于自身保护的化合物,因而只能依靠原始的组织构成和自身的结构强度来抵御熔融渣铁、高速煤气流和其它有害元素的化学侵蚀和机械冲刷,必然导致炉衬厚度随着使用时间逐渐减薄,尽管在高炉冷却设备的冷却作用下,炉衬热面能够形成阻碍化学侵蚀、机械冲刷的“渣皮”,但是化学侵蚀、机械冲刷在旧渣皮脱落后新渣皮形成前仍然存在,耐火内衬的厚度仍然会不断减薄。
高炉目前所用浇注料形成的耐火内衬存在的上述缺陷,导致炉衬厚度在炉内产物的化学侵蚀、机械冲刷下逐渐减薄,最终失去对冷却设备、炉壳等装置的保护功能,使得这些装置不能获得长的使用周期,进而降低了高炉寿命。
发明内容
针对炼铁高炉内衬用现有浇注料的技术不足,本发明的目在于提供一种炼铁高炉用铝钛复合耐火浇注料,取代炼铁高炉内衬目前所用的耐火浇注料,提升高炉内衬的使用周期,延长高炉寿命。
本发明的理论依据是充分利用高炉内的缺氧、富氮和富碳的特有的还原性气氛,促成炉衬材料中复合存在的氧化钛与炉内的氮、碳元素结合,在炉衬材料的表面形成具有高熔点和高耐磨性的氮化钛和碳化钛保护层。而且,随着早期形成的表面保护层遭受侵蚀而消失,新生的保护层会随即生成,形成对耐材表面保护层的不断新旧替换,实现炉衬的自我保护,从而延长炉衬的使用寿命。
本发明的技术方案如下:
本发明提供的炼铁高炉用铝钛复合耐火浇注料,采用相同于普通耐火浇注料的原料称量、混合、包装工序制成,制成的铝钛复合耐火浇注料的成分组成(质量百分比)为:
Al2O3:55%~88%;
TiO2:4%~15%;
Fe2O3:0.1%~1.5%;
SiO2:5%~35%;
其余为CaO和MgO等:0.3%~2.0%。
本发明的炼铁高炉用铝钛复合耐火浇注料的具体成分组成(质量百分比)优选为:
Al2O3:83%;
TiO2:8%;
Fe2O3:0.6%;
SiO2:6.5%;
其余为CaO和MgO等:1.9%。
本发明的炼铁高炉用铝钛复合耐火浇注料的具体成分组成(质量百分比)可选择为:
Al2O3:75%;
TiO2:10%;
Fe2O3:0.8%;
SiO2:12.5%;
其余为CaO和MgO等:1.7%。
本发明的炼铁高炉用铝钛复合耐火浇注料的具体成分组成(质量百分比)还可选择为:
Al2O3:60%;
TiO2:4%;
Fe2O3:0.8%;
SiO2:33%;
其余为CaO和MgO等:1.2%。
所述炼铁高炉用铝钛复合耐火浇注料中的氧化钛由同时含有Ti2O3或者TiO2和Al2O3成分的铝钛复合原料提供,或者由TiO2颗粒、TiO2粉体提供或者其它富含氧化钛的材料提供。
铝钛复合原料中TiO2含量为6%-26%(质量百分比),Al2O3含量为70%-90%(质量百分比),其余1%-5%为Fe2O3、CaO、MgO等。
所述的一种炼铁高炉用铝钛复合耐火浇注料施工时采用的结合剂可以采用水、硅溶胶或者预加硅凝胶固体细粉。
所述的一种炼铁高炉用铝钛复合耐火浇注料的施工方法可以是支摸浇注也可以是使用喷涂设备进行湿法喷涂。
本发明的有益效果:
本发明提供的炼铁高炉用铝钛复合耐火浇注料可用于炉缸内衬、铁口区域、风口区域、冷却壁工作端浇注和炉腹、炉腰以及炉身中上部等部位的湿法喷涂等等。使用中,铝钛复合耐火浇注料中的TiO2组分与高炉内的N2、CO、C接触时,在接触界面上生成高硬度、耐火度高、稳定性好的碳氮化物,从而提高了耐火浇注料自身抵御炉内产物化学侵蚀、机械冲刷的能力,所砌筑的炉衬具有了自保护功能,降低了炉衬的破损速率,延长了冷却设备、炉壳等的使用周期,因此将延长高炉寿命。
具体实施方式
实施例1:
本发明的具体实施是将电熔刚玉颗粒和含有13%的TiO2(质量百分比)、82%的Al2O3(质量百分比)铝钛复合原料配合成混合料,再与α-氧化铝微粉、氧化硅微粉、铝酸钙水泥、三聚磷酸钠、减水剂、按工艺料比称量后进行混合,得到本发明的炼铁高炉用铝钛复合耐火浇注料。
本实施例的炼铁高炉用铝钛复合耐火浇注料的具体成分组成和制样检测的技术性能见表1。本实施方案采用的结合剂为水。
实施例2:
本发明的具体实施是将电熔刚玉颗粒、莫来石颗粒和含有24%的TiO2(质量百分比)、75%的Al2O3(质量百分比)铝钛复合原料按照配合成混合料、再与α-氧化铝微粉、氧化硅微粉、铝酸钙水泥、三聚磷酸钠、减水剂等按工艺料比称量后进行混合,得到本发明的炼铁高炉用铝钛复合耐火浇注料。
本实施例的炼铁高炉用铝钛复合耐火浇注料的具体成分组成和制样检测的技术性能见表1。本实施方案采用的结合剂为水。
实施例3:
本发明的具体实施是将莫来石颗粒、焦宝石颗粒和含有10%的TiO2(质量百分比)、86%的Al2O3(质量百分比)铝钛复合原料配合成混合料、再与α-氧化铝微粉、氧化硅微粉、铝酸钙水泥、三聚磷酸钠、减水剂等按工艺料比称量后进行混合,得到本发明的炼铁高炉用铝钛复合耐火浇注料。
且所述铝钛复合耐火浇注料也可以加溶剂稀释支撑喷涂料使用。
本实施例的炼铁高炉用铝钛复合耐火浇注料的具体成分组成和制样检测的技术性能见表1。本实施方案采用的结合剂为水。
表1:铝钛复合耐火制品的具体成分组成与技术性能
Figure BDA0002746576210000061
其生产工艺比较简单,原料检验-(颗粒料,粉料,结合剂)自动配料-包装-出厂检验;施工工序:使用强力混合机-干混-加水或者硅溶胶湿混-支摸浇注或者使用喷涂设备喷涂。关键是它是不定型产品,与成型产品不同类,用不定型产品逐步取代定型产品是耐火材料发展的趋势。它的主要优点在于生产工艺简单和施工便捷。
尽管本发明的实施方案已公开如上,但并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节。

Claims (8)

1.一种炼铁高炉用铝钛复合耐火浇注料,其特征在于:所述炼铁高炉用铝钛复合耐火浇注料的组成成分的质量百分比为:
Al2O3:55%~88%;
TiO2:4%~15%;
Fe2O3:0.1%~1.5%;
SiO2:5%~35%;
其余为CaO和MgO:0.3%~2.0%。
2.根据权利要求1所述的一种炼铁高炉用铝钛复合耐火浇注料,其特征在于:所述炼铁高炉用铝钛复合耐火浇注料的具体组成成分的质量百分比为:
Al2O3:83%;
TiO2:8%;
Fe2O3:0.6%;
SiO2:6.5%;
其余为CaO和MgO:1.9%。
3.根据权利要求1所述的一种炼铁高炉用铝钛复合耐火浇注料,其特征在于:所述炼铁高炉用铝钛复合耐火浇注料的具体组成成分的质量百分比为:
Al2O3:75%;
TiO2:10%;
Fe2O3:0.8%;
SiO2:12.5%;
其余为CaO和MgO:1.7%。
4.根据权利要求1所述的一种炼铁高炉用铝钛复合耐火浇注料,其特征在于:所述炼铁高炉用铝钛复合耐火浇注料的具体组成成分的质量百分比为:
Al2O3:60%;
TiO2:4%;
Fe2O3:0.8%;
SiO2:33%;
其余为CaO和MgO:1.2%。
5.根据权利要求1~4任一项权利要求所述的一种炼铁高炉用铝钛复合耐火浇注料,其特征在于:所述炼铁高炉用铝钛复合耐火浇注料中的氧化钛由同时含有Ti2O3或者TiO2和Al2O3成分的铝钛复合原料提供,或者由TiO2颗粒、TiO2粉体提供或者由其它富含氧化钛的材料提供。
6.根据权利要求5所述的一种炼铁高炉用铝钛复合耐火浇注料,其特征在于:所述铝钛复合原料中TiO2含量的质量百分比为6%-26%(),Al2O3含量的质量百分比为70%-90%,其余1%-5%为Fe2O3、CaO、MgO。
7.根据权利要求6所述的一种炼铁高炉用铝钛复合耐火浇注料,所述铝钛复合耐火浇注料施工时采用的结合剂为水、硅溶胶或者预加硅凝胶固体细粉。
8.根据权利要求7所述的一种炼铁高炉用铝钛复合耐火浇注料,所述铝钛复合耐火浇注料施工采用浇注或者湿法喷涂方式进行。
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