CN105906349B - 一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法 - Google Patents
一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 29
- 239000003595 mist Substances 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 25
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 25
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 25
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011449 brick Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 14
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- -1 magnesium aluminate Chemical class 0.000 claims abstract description 13
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 13
- 239000011029 spinel Substances 0.000 claims abstract description 13
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
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- 229910052906 cristobalite Inorganic materials 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052682 stishovite Inorganic materials 0.000 claims description 10
- 229910052905 tridymite Inorganic materials 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
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- 238000002474 experimental method Methods 0.000 description 6
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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 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明涉及一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法。其技术方案是：以50~55wt%的高纯镁砂颗粒和10~13wt%的镁铝尖晶石颗粒为骨料，以7~9wt%的用后镁碳砖细粉、9~11wt%的电熔镁砂细粉、13~18wt%的Cr7C3微粉和1~4wt%的氧化锆微粉为基质料。按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混匀。然后外加占所述基质料与所述骨料之和10~12wt%的铝溶胶，搅拌均匀，振动成型，室温养护，在90~110℃条件下保温12~24h，制得高炉出铁沟摆动流槽用耐火浇注料。本发明具有成本低廉和工艺简单的特点；制备的高炉出铁沟摆动流槽用耐火浇注料的导热系数低、高温抗折强度大、抗热震性能好和通铁量高。
Description
技术领域
本发明属于摆动流槽用耐火浇注料技术领域。具体涉及一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法。
背景技术
高炉出铁沟是铁水转流进入混铁车(或鱼雷罐)的重要路径。在出铁沟末端设有摆动流槽，其主要作用在于调节铁水的流动方向，使铁水流向出铁场平台中任一混铁车(或鱼雷罐)，保证出铁过程的连续性。
与出铁沟类似，摆动流槽用耐火材料必须经受整个出铁过程中铁水的冲刷及熔渣的侵蚀；此外，摆动流槽属于间歇式工作，对耐火材料的抗热震性提出了严格的要求。
目前高炉出铁沟摆动流槽用耐火浇注料主要为“Al2O3-SiC-C质浇注料”和“刚玉-莫来石质浇注料”。
采用“Al2O3-SiC-C质浇注料”作为高炉出铁沟摆动流槽用耐火材料，结合了刚玉、SiC和C三者的优点，其耐火度高、抗冲刷磨损能力较强，且由于C的引入，显著提升了材料的抗热震性。但SiC和C在服役时均暴露在空气中，容易发生氧化生成气体而逸出，大大降低了材料的致密度，进而降低了材料的强度和抗渣侵蚀性能。
采用“刚玉-莫来石质浇注料”作为高炉出铁沟摆动流槽用耐火材料，其耐火度高，且莫来石的引入增强了材料的耐磨损和抗冲刷性能；其次，“刚玉-莫来石质浇注料”体系中无SiC或C的引入，避免了SiC或C氧化所引起的结构缺陷。但“刚玉-莫来石质浇注料”常以铝酸钙水泥为结合剂，由于CaO的引入易与体系中的Al2O3-SiO2形成低熔相(如钙长石相)，降低了“刚玉-莫来石质浇注料”的高温强度。
此外，刚玉、SiC和莫来石等耐火原料的成本均较高，提高了高炉出铁沟摆动流槽用耐火浇注料的开发成本。
发明内容
本发明旨在克服现有技术缺陷，目的在于提供一种成本低廉、工艺简单的高炉出铁沟摆动流槽用耐火浇注料的制备方法；用该方法制备的高炉出铁沟摆动流槽用耐火浇注料的导热系数低、高温抗折强度大、抗热震性能好和通铁量高。
为实现上述目的，本发明采用的技术方案是：以50～55wt％的高纯镁砂颗粒和10～13wt％的镁铝尖晶石颗粒为骨料，以7～9wt％的用后镁碳砖细粉、9～11wt％的电熔镁砂细粉、13～18wt％的Cr7C3微粉和1～4wt％的氧化锆微粉为基质料。按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀。然后外加占所述基质料与所述骨料之和10～12wt％的铝溶胶，搅拌均匀，振动成型，室温条件下养护6～12小时，最后在90～110℃条件下保温12～24h，制得高炉出铁沟摆动流槽用耐火浇注料。
所述高纯镁砂颗粒的主要化学成分是：MgO含量为97～98wt％，SiO2含量＜0.5wt％；高纯镁砂颗粒的粒度为0.1～8mm。
所述镁铝尖晶石颗粒的主要化学成分是：MgO含量为50～55wt％，Al2O3含量为40～45wt％；镁铝尖晶石颗粒的粒度为0.1～5mm。
所述用后镁碳砖细粉的主要化学成分是：MgO含量为90～91wt％，C含量为7～8wt％，CaO含量＜0.5wt％，SiO2含量＜0.5wt％；用后镁碳砖细粉的粒度为0.064～0.088mm。
所述电熔镁砂细粉的主要化学成分是：MgO含量为99.0～99.5wt％，SiO2含量＜0.2wt％；电熔镁砂细粉的粒度为0.064～0.088mm。
所述Cr7C3微粉的Cr7C3含量＞99wt％；Cr7C3微粉的粒度为20～30μm。
所述氧化锆微粉的ZrO2含量＞99wt％；氧化锆微粉的粒度为20～30μm。
所述硅溶胶的SiO2含量为30～35wt％。
由于采取上述技术方案，本发明与现有技术相比具有如下积极效果：
1、本发明采用高纯镁砂和用后镁碳砖为原料，显著降低了高炉出铁沟摆动流槽用耐火浇注料的开发成本。
2、本发明无需特殊的制备设备和处理技术，节省劳动力资源，工艺流程简单。
3、本发明采用溶胶结合，不与浇注料组分形成低熔相，进而增大了材料的高温强度。
4、本发明通过使用过程中浇注料组分间的物相反应所引发的体积效应缓解浇注料内部的热应力，降低材料的导热系数，并提高材料的抗热震性能。
本发明制备的高炉出铁沟摆动流槽用耐火浇注料经测定：导热系数(900℃)为2.40～2.45W/(m·K)；高温(1400℃×0.5h)抗折强度为6.5～7.0MPa；1300℃水冷一次热震稳定性实验残余强度保持率为89～94％；一次通铁量为23.0～25.0万吨。
因此，本发明具有成本低廉和工艺简单的特点；所制备的高炉出铁沟摆动流槽用耐火浇注料的导热系数低、高温抗折强度大、抗热震性能好和通铁量高。
具体实施方式
下面结合具体实施方式对本发明作进一步的描述，并非对其保护范围的限制。
为避免重复，先将本具体实施方式所涉及的骨料和基质料统一描述如下，实施例中不再赘述：
所述高纯镁砂颗粒的主要化学成分是：MgO含量为97～98wt％，SiO2含量＜0.5wt％；高纯镁砂颗粒的粒度为0.1～8mm。
所述镁铝尖晶石颗粒的主要化学成分是：MgO含量为50～55wt％，Al2O3含量为40～45wt％；镁铝尖晶石颗粒的粒度为0.1～5mm。
所述用后镁碳砖细粉的主要化学成分是：MgO含量为90～91wt％，C含量为7～8wt％，CaO含量＜0.5wt％，SiO2含量＜0.5wt％；用后镁碳砖细粉的粒度为0.064～0.088mm。
所述电熔镁砂细粉的主要化学成分是：MgO含量为99.0～99.5wt％，SiO2含量＜0.2wt％；，电熔镁砂细粉的粒度为0.064～0.088mm。
所述Cr7C3微粉的Cr7C3含量＞99wt％；Cr7C3微粉的粒度为20～30μm。
所述氧化锆微粉的ZrO2含量＞99wt％；氧化锆微粉的粒度为20～30μm。
所述硅溶胶的SiO2含量为30～35wt％。
实施例1
一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法。以53～55wt％的高纯镁砂颗粒和10～12wt％的镁铝尖晶石颗粒为骨料，以7～8wt％的用后镁碳砖细粉、9～10wt％的电熔镁砂细粉、13～15wt％的Cr7C3微粉和1～3wt％的氧化锆微粉为基质料。按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀。然后外加占所述基质料与所述骨料之和10～11wt％的铝溶胶，搅拌均匀，振动成型，室温条件下养护6～12小时，最后在90～110℃条件下保温12～24h，制得高炉出铁沟摆动流槽用耐火浇注料。
本实施例制备的高炉出铁沟摆动流槽用耐火浇注料经测定：导热系数(900℃)为2.43～2.45W/(m·K)；高温(1400℃×0.5h)抗折强度为6.5～6.7MPa；1300℃水冷一次热震稳定性实验残余强度保持率为89～91％；一次通铁量为23.0～23.8万吨。
实施例2
一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法。以52～54wt％的高纯镁砂颗粒和10～12wt％的镁铝尖晶石颗粒为骨料，以7～8wt％的用后镁碳砖细粉、9～10wt％的电熔镁砂细粉、14～16wt％的Cr7C3微粉和1～3wt％的氧化锆微粉为基质料。按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀。然后外加占所述基质料与所述骨料之和10～11wt％的铝溶胶，搅拌均匀，振动成型，室温条件下养护6～12小时，最后在90～110℃条件下保温12～24h，制得高炉出铁沟摆动流槽用耐火浇注料。
本实施例制备的高炉出铁沟摆动流槽用耐火浇注料经测定：导热系数(900℃)为2.42～2.44W/(m·K)；高温(1400℃×0.5h)抗折强度为6.6～6.8MPa；1300℃水冷一次热震稳定性实验残余强度保持率为90～92％；一次通铁量为23.4～24.2万吨。
实施例3
一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法。以51～53wt％的高纯镁砂颗粒和11～13wt％的镁铝尖晶石颗粒为骨料，以8～9wt％的用后镁碳砖细粉、10～11wt％的电熔镁砂细粉、15～17wt％的Cr7C3微粉和2～4wt％的氧化锆微粉为基质料。按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀。然后外加占所述基质料与所述骨料之和11～12wt％的铝溶胶，搅拌均匀，振动成型，室温条件下养护6～12小时，最后在90～110℃条件下保温12～24h，制得高炉出铁沟摆动流槽用耐火浇注料。
本实施例制备的高炉出铁沟摆动流槽用耐火浇注料经测定：导热系数(900℃)为2.41～2.43W/(m·K)；高温(1400℃×0.5h)抗折强度为6.7～6.9MPa；1300℃水冷一次热震稳定性实验残余强度保持率为91～93％；一次通铁量为23.8～24.6万吨。
实施例4
一种高炉出铁沟摆动流槽用耐火浇注料及其制备方法。以50～52wt％的高纯镁砂颗粒和11～13wt％的镁铝尖晶石颗粒为骨料，以8～9wt％的用后镁碳砖细粉、10～11wt％的电熔镁砂细粉、16～18wt％的Cr7C3微粉和2～4wt％的氧化锆微粉为基质料。按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀。然后外加占所述基质料与所述骨料之和11～12wt％的铝溶胶，搅拌均匀，振动成型，室温条件下养护6～12小时，最后在90～110℃条件下保温12～24h，制得高炉出铁沟摆动流槽用耐火浇注料。
本实施例制备的高炉出铁沟摆动流槽用耐火浇注料经测定：导热系数(900℃)为2.40～2.42W/(m·K)；高温(1400℃×0.5h)抗折强度为6.8～7.0MPa；1300℃水冷一次热震稳定性实验残余强度保持率为92～94％；一次通铁量为24.2～25.0万吨。
本具体实施方式与现有技术相比具有如下积极效果：
1、本具体实施方式采用高纯镁砂和用后镁碳砖为原料，显著降低了高炉出铁沟摆动流槽用耐火浇注料的开发成本。
2、本具体实施方式无需特殊的制备设备和处理技术，节省劳动力资源，工艺流程简单。
3、本具体实施方式采用溶胶结合，不与浇注料组分形成低熔相，进而增大了材料的高温强度。
4、本具体实施方式通过使用过程中浇注料组分间的物相反应所引发的体积效应缓解浇注料内部的热应力，降低材料的导热系数，并提高材料的抗热震性能。
本具体实施方式制备的高炉出铁沟摆动流槽用耐火浇注料经测定：导热系数(900℃)为2.40～2.45W/(m·K)；高温(1400℃×0.5h)抗折强度为6.5～7.0MPa；1300℃水冷一次热震稳定性实验残余强度保持率为89～94％；一次通铁量为23.0～25.0万吨。
因此，本具体实施方式具有成本低廉和工艺简单的特点；所制备的高炉出铁沟摆动流槽用耐火浇注料的导热系数低、高温抗折强度大、抗热震性能好和通铁量高。
Claims (8)
1.一种高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于以50～55wt％的高纯镁砂颗粒和10～13wt％的镁铝尖晶石颗粒为骨料，以7～9wt％的用后镁碳砖细粉、9～11wt％的电熔镁砂细粉、13～18wt％的Cr7C3微粉和1～4wt％的氧化锆微粉为基质料；按所述骨料和所述基质料的含量，先将基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀；然后外加占所述基质料与所述骨料之和10～12wt％的铝溶胶，搅拌均匀，振动成型，室温条件下养护6～12小时，最后在90～110℃条件下保温12～24h，制得高炉出铁沟摆动流槽用耐火浇注料。
2.根据权利要求1所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于所述高纯镁砂颗粒的主要化学成分是：MgO含量为97～98wt％，SiO2含量＜0.5wt％；高纯镁砂颗粒的粒度为0.1～8mm。
3.根据权利要求1所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于所述镁铝尖晶石颗粒的主要化学成分是：MgO含量为50～55wt％，Al2O3含量为40～45wt％；镁铝尖晶石颗粒的粒度为0.1～5mm。
4.根据权利要求1所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于所述用后镁碳砖细粉的主要化学成分是：MgO含量为90～91wt％，C含量为7～8wt％，CaO含量＜0.5wt％，SiO2含量＜0.5wt％；用后镁碳砖细粉的粒度为0.064～0.088mm。
5.根据权利要求1所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于所述电熔镁砂细粉的主要化学成分是：MgO含量为99.0～99.5wt％，SiO2含量＜0.2wt％；电熔镁砂细粉的粒度为0.064～0.088mm。
6.根据权利要求1所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于所述Cr7C3微粉的Cr7C3含量＞99wt％；Cr7C3微粉的粒度为20～30μm。
7.根据权利要求1所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法，其特征在于所述氧化锆微粉的ZrO2含量＞99wt％；氧化锆微粉的粒度为20～30μm。
8.一种高炉出铁沟摆动流槽用耐火浇注料，其特征在于所述高炉出铁沟摆动流槽用耐火浇注料是根据权利要求1～7项中任一项所述的高炉出铁沟摆动流槽用耐火浇注料的制备方法所制备的高炉出铁沟摆动流槽用耐火浇注料。
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