CN112759405A - 一种炼铁高炉用铝钛碳化硅复合耐火定型制品 - Google Patents
一种炼铁高炉用铝钛碳化硅复合耐火定型制品 Download PDFInfo
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- -1 Aluminum titanium silicon Chemical compound 0.000 title claims abstract description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 17
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 9
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 8
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- 239000000463 material Substances 0.000 claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
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- 238000001035 drying Methods 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开了一种炼铁高炉用铝钛碳化硅复合耐火定型制品，其组成成分的质量百分比为：Al2O3：60％‑76％；TiO2：3％‑15％；SiC：8％‑20％；Fe2O3：0.1％‑1.0％；SiO2：3％‑8％；其余为CaO和MgO、K2O、Na2O：0.3％‑1.5％。本发明提供的一种炼铁高炉用铝钛碳化硅复合耐火定型制品，可用于砌筑高炉陶瓷杯、风口和铁口内衬、风口以上的高炉内衬，还可用作冷却壁镶砖。使用中，铝钛碳化硅复合耐火定型制品中的钛氧化物组分与高炉内的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，从而提高了耐火定型制品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。
Description
技术领域
本发明涉及炼铁高炉用耐火材料技术领域，具体涉及一种炼铁高炉用铝钛碳化硅复合耐火定型制品。
背景技术
炼铁高炉的内衬目前采用的耐火炉衬材料通常有刚玉砖、刚玉莫来石砖、刚玉碳化硅砖、氮化硅结合碳化硅砖、赛隆结合刚玉砖等。
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、高速煤气流等接触到这些耐火砖的工作端时，将对耐火砖产生化学侵蚀、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，炉衬材料的使用寿命尚有较大改进需求。
高炉目前所用耐火炉衬存在的上述缺陷，随着炉衬厚度的逐渐减薄，会导致对冷却设备以及炉壳等装置的保护功能逐渐减弱并最终失去，进而使得高炉进一步延长寿命的技术进步遭遇瓶颈。
发明内容
针对炼铁高炉内衬用现有耐火砖的技术不足，本发明的目在于提供一种炼铁高炉用铝钛碳化硅复合耐火定型制品，取代炼铁高炉内衬目前所用的耐火炉衬，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碳化硅复合耐火定型制品，制造工艺可以采用与普通耐火定型制品的原料称量、混合、成型、干燥、热处理或烧成等相同的工序制造。
制成的炼铁高炉用铝钛碳化硅复合耐火定型制品的成分组成(质量百分比)为：Al2O3：60％-76％；TiO2：3％-15％；SiC：8％-20％；Fe2O3：0.1％-1.0％；SiO2：3％-8％；其余为CaO和MgO、K2O、Na2O：0.3％-1.5％。
本发明的炼铁高炉用铝钛碳化硅复合耐火定型制品的具体成分组成(质量百分比)优选为：Al2O3：68％；TiO2：11％；SiC：14％；Fe2O3：0.4％；SiO2：6％；其余为CaO和MgO、K2O、Na2O：0.6％。
本发明的炼铁高炉用铝钛碳化硅复合耐火定型制品的具体成分组成(质量百分比)可选择为：Al2O3：61％；TiO2：15％；SiC：18％；Fe2O3：0.8％；SiO2：4.5％；其余为CaO和MgO、K2O、Na2O：0.7％。
本发明的炼铁高炉用铝钛碳化硅复合耐火定型制品的具体成分组成(质量百分比)还可选择为：Al2O3：75％；TiO2：4％；SiC：16％；Fe2O3：0.3％；SiO2：4.3％；其余为CaO和MgO、K2O、Na2O：0.4％。
所述炼铁高炉用铝钛碳化硅复合耐火定型制品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。
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、K2O、Na2O。
本发明的有益效果：
本发明提供的炼铁高炉用铝钛碳化硅复合耐火定型制品可用于砌筑高炉陶瓷杯、风口和铁口内衬、风口以上的高炉内衬，还可用作冷却壁镶砖。使用中，铝钛碳化硅复合耐火定型制品中的钛氧化物组分与高炉内的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，从而提高了耐火定型制品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
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合具体实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例1：
本发明的具体实施是将电熔刚玉颗粒和含有16％的TiO2(质量百分比)、77％的Al2O3(质量百分比)铝钛复合原料、碳化硅颗粒按工艺料比配合成混合料，再与碳化硅细粉、α-氧化铝微粉、氧化硅微粉、铝酸钙水泥、三聚磷酸钠、减水剂、水或硅溶胶等按工艺料比称量后进行混合，之后经成型、干燥、热处理或烧成，得到本发明的炼铁高炉用铝钛碳化硅复合耐火定型制品。
本实施例的炼铁高炉用铝钛碳化硅复合耐火定型制品的具体成分组成、技术性能见表1。
实施例2：
本发明的具体实施是将电熔刚玉颗粒、含有24％的TiO2(质量百分比)、75％的Al2O3(质量百分比)铝钛复合原料、碳化硅颗粒按工艺料比配合成混合料、再与碳化硅细粉、α-氧化铝微粉、氧化硅微粉、铝酸钙水泥、三聚磷酸钠、减水剂、水或硅溶胶等，按工艺料比称量后进行混合，之后经成型、干燥、热处理或烧成，得到本发明的炼铁高炉用铝钛碳化硅复合耐火定型制品。
本实施例的炼铁高炉用铝钛碳化硅复合耐火定型制品的具体成分组成、技术性能见表1。
实施例3：
本发明的具体实施是将电熔刚玉颗粒、含有7％的TiO2(质量百分比)、88％的Al2O3(质量百分比)铝钛复合原料、碳化硅颗粒按工艺料比配合成混合料、再与碳化硅细粉、α-氧化铝微粉、氧化硅微粉、铝酸钙水泥、三聚磷酸钠、减水剂、水或硅溶胶等，按工艺料比称量后进行混合，之后经成型、干燥、热处理或烧成，得到本发明的炼铁高炉用铝钛碳化硅复合耐火定型制品。
本实施例的炼铁高炉用铝钛碳化硅复合耐火定型制品的具体成分组成、技术性能见表1。
表1铝钛碳化硅复合耐火定型制品的具体成分组成与技术性能
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。
Claims (6)
1.一种炼铁高炉用铝钛碳化硅复合耐火定型制品，其特征在于：其组成成分的质量百分比为：Al2O3：60％-76％；TiO2：3％-15％；SiC：8％-20％；Fe2O3：0.1％-1.0％；SiO2：3％-8％；其余为CaO和MgO、K2O、Na2O：0.3％-1.5％。
2.根据权利要求1所述的一种炼铁高炉用铝钛碳化硅复合耐火定型制品，其特征在于：所述炼铁高炉用铝钛碳化硅复合耐火定型制品的具体组成成分的质量百分比为：Al2O3：68％；TiO2：11％；SiC：14％；Fe2O3：0.4％；SiO2：6％；其余为CaO和MgO、K2O、Na2O：0.6％。
3.根据权利要求1所述的一种炼铁高炉用铝钛碳化硅复合耐火定型制品，其特征在于：所述炼铁高炉用铝钛碳化硅复合耐火定型制品的具体组成成分的质量百分比为：Al2O3：61％；TiO2：15％；SiC：18％；Fe2O3：0.8％；SiO2：4.5％；其余为CaO和MgO、K2O、Na2O：0.7％。
4.根据权利要求1所述的一种炼铁高炉用铝钛碳化硅复合耐火定型制品，其特征在于：所述炼铁高炉用铝钛碳化硅复合耐火定型制品的具体组成成分的质量百分比为：Al2O3：75％；TiO2：4％；SiC：16％；Fe2O3：0.3％；SiO2：4.3％；其余为CaO和MgO、K2O、Na2O：0.4％。
5.根据权利要求1所述的一种炼铁高炉用铝钛碳化硅复合耐火定型制品，其特征在于：所述炼铁高炉用铝钛碳化硅复合耐火定型制品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碳化硅复合耐火定型制品，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、K2O、Na2O。
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