CN111470854A - 一种复合质中间包吸渣过滤器及生产方法 - Google Patents
一种复合质中间包吸渣过滤器及生产方法 Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 47
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 33
- 239000002131 composite material Substances 0.000 title claims abstract description 30
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 21
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- 230000000996 additive effect Effects 0.000 claims abstract description 19
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 15
- 239000010431 corundum Substances 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 12
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000013329 compounding Methods 0.000 claims abstract description 10
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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 claims abstract description 9
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
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Abstract
本发明涉及一种复合质中间包吸渣过滤器及生产方法,由滤筒与本体两部份复合而成,所述的滤筒由含碳多孔轻质材料添加结合剂经冷等静压成型,滤筒由以下原料组成:氧化铝空心球,莫来石,刚玉,碳化硅,石墨,轻烧氧化铝粉,添加剂一,外加液体酚醛树脂,添加剂一为硼玻璃粉、硅粉、铝粉中的一种或几种组合;本体由镁铝质耐火材料浇注而成,本体由以下原料组成:烧结镁砂,板状刚玉粉,硅灰,铝粉,添加剂二。优点是:滤筒材质有其多孔的结构,并与下水口内腔材料相仿,可有效的去除钢液中的间杂物,减少下水口堵塞现象发生。使用过程中在滤筒表面形成空隙率更高的粗糙面,更有利于钢水中的夹杂物的吸附。
Description
技术领域
本发明属于钢铁连铸用耐火材料领域,尤其涉及一种复合质中间包吸渣过滤器及生产方法。
背景技术
随着钢铁技术水平和工装设备的不断提升,连铸比提高,对钢材质量和品种结构而言,提高钢水洁净度,减少钢水中的夹渣物越来越受到人们的重视,中间包作为连铸工艺中的关键设备,除了满足钢水供应,均匀钢水成分和温度以外,更重要的功能是起到促进夹杂物上浮和净化钢水的作用,其中安装中间包吸渣过滤器是常见去除夹杂物行之有效的措施之一,通常吸渣过滤器和湍流器、挡渣墙、挡渣坝配合使用起到净化钢水,促进夹杂物上浮,减少水口结瘤,防止下水口絮流堵塞影响连铸正常进行的作用。
中间包吸渣过滤器与挡渣墙将中间包分隔成为两个独立的区域,长水口所在的区域为冲击区,下水口所在的区域为浇注区,钢液只能在吸渣过滤器的引导下由冲击区流向浇注区,过滤器能够阻碍一部分大颗粒夹杂物从冲击区流向浇注区,把由长水口流入中间包的钢液而形成激烈的湍流运动控制在冲击区。改变钢液的运动轨迹,有利于夹杂物进行碰撞上浮,或被过滤器直接吸附。
中间包吸渣过滤器的结构类型有网格型、颗粒层型、多孔型和直通孔型等,其中多孔型和直通孔型是应用最为广泛的形式。
目前,过滤器的材质有很多种,如石灰、氧化铝、莫来石、氧化锆、碳化硅等,而以上材质对钢水中的氧含量的去除没有明显的效果。通过滤筒材料中添加部分石墨碳,可有效的去除钢水中的氧,而含碳材料作为过滤器材质尚未应用。
钢液经过滤器滤筒由冲击区流向浇注区,通过优化改进滤筒的材质及采用多孔结构,对钢液中的夹杂物进行快速吸附过滤,净化流向浇注区的钢液,减少下水口的堵塞现象。而且现有的陶瓷过滤器,由于陶瓷表面相当比较光滑,夹杂物的不易附着。
发明内容
为克服现有技术的不足,本发明的目的是提供一种复合质中间包吸渣过滤器及生产方法,可有效的去除钢液中的夹杂物,降低钢液中的氧含量,有效的减轻下水口浇注中堵塞的现象。
为实现上述目的,本发明通过以下技术方案实现:
一种复合质中间包吸渣过滤器,由滤筒与本体两部份复合而成,所述的滤筒由含碳多孔轻质材料添加结合剂经冷等静压成型,滤筒按质量百分比由以下原料组成:氧化铝空心球40%-70%,莫来石5%-15%,刚玉0-30%,碳化硅5%-15%,石墨3%-10%,轻烧氧化铝粉3%-8%,添加剂一2%-6%,外加上述原料总质量8%-10%的液体酚醛树脂,添加剂一为硼玻璃粉、硅粉、铝粉中的一种或几种组合;
本体由镁铝质耐火材料浇注而成,本体按质量百分比由以下原料组成:烧结镁砂66%-85%,板状刚玉粉10%-25%,硅灰3%-5%,铝粉0.5%-2%,添加剂二0.5%-2%,添加剂二为聚磷酸钠、柠檬酸、防爆纤维、耐热钢纤维的一种或几种组合。
所述的氧化铝空心球粒径为1-0mm;碳化硅的粒径为200-0目;莫来石的粒径为0.21-0mm;刚玉的粒径为0.5-0mm;石墨粒径为100目,碳含量为98%以上;轻烧氧化铝粉的粒径为5-1微米。
所述的添加剂一中硼玻璃粉的粒径为200-0目;硅粉的粒径为325目;金属铝粉的粒径为200目。
所述的滤筒的内腔截面积为70-5500mm2,滤筒的内腔总截面积为下水口内腔截面积的3-10倍。
所述的烧结镁砂粒径为10-0mm;板状刚玉的粒径为200目;铝粉的粒径为200目。
其中,氧化铝空心球是一种高温隔热材料,用工业氧化铝在电炉中熔炼吹制而成。应用氧化铝空心球的空心结构经压制成型后,将滤筒材料制作成多孔、粗糙的表面结构,更加有利于钢液中的夹杂物(以Al2O3为主要成分)吸附。
莫来石可提高滤筒材料的抗热震稳定性能。
刚玉用以取代部分氧化铝空心球,提高滤筒材料的成型强度。
石墨,将滤筒材料制作成含碳材料,以去除钢液中的氧含量。
滤筒材料中采用碳化硅、铝粉、硅粉可起到抗氧化剂作用。
滤筒材料中采用氧化铝粉与硼玻璃粉以改善滤筒材料的烧结性能。
本体材料中采用烧结镁砂作为主要原材料,应用镁质材料可吸附钢液中的部分夹杂物且不污染钢水的特点。
本体材料中采用部分板状刚玉粉,在高温使用中可与镁砂反应生成镁铝尖晶石,改善材料的高温性能。
本体材料中采用硅灰,可填充本体浇注料的内部空隙,增加浇注料的流动性。
本体材料中采用的添加剂二,主要功能为减水剂,防止干燥过程中产生裂纹。
一种复合质中间包吸渣过滤器的生产方法,包括以下步骤:
(1)滤筒的制作
①除液体酚醛树脂外,将按配比称量好的滤筒原料加入混炼机中预混3-5分钟,然后加入液体液体酚醛树脂,混炼均匀后,在90-120℃条件下干燥,作为滤筒胚料待用;
②将滤筒胚料加入到胶膜中,震实后密封,在冷等静压机中打压成型,成型压力为50-80Mpa;
③成型后的滤筒毛坯在窑炉中预烧,升温速率为15-20℃/h,升温至200-240℃;
④将预烧后的毛坯置于烧成窑内,在还原气氛中烧成,烧成温度为1200℃-1300℃,保温时间3小时以上;
(2)中间包吸渣过滤器的制作
①将烧制好的滤筒置于过滤器模具中;
②将按配比称量好的本体原料加入搅拌机中,混合3-5分钟后加入水,水的加入量为本体原料质量的4%-5.5%,再搅拌3分钟以上;
③将搅拌好的本体原料加入模具中,使用震动台或震动棒震动成型;成型后的吸渣过滤器经养护后拆模;
④成型后的吸渣过滤器置于干燥窑内进行干燥,升温速率5-15℃/h,升温至300-350℃,保温5小时以上;
⑤干燥后的中间包吸渣过滤器包装即可。
与现有技术相比,本发明的有益效果是:
复合质中间包吸渣过滤器的滤筒材质有其多孔的结构,并与下水口内腔材料相仿,可有效的去除钢液中的间杂物,减少下水口堵塞现象发生。滤筒添加含碳材料,可以有效的去除钢液中的氧含量。相比现有的陶瓷过滤器,由于陶瓷表面相当比较光滑,夹杂物的不易附着。而本发明过滤器的滤筒材料采用含碳耐火材料,使用前滤筒表面并非光滑的陶瓷层,使用过程中由于滤筒表面的石墨碳与钢水中的氧反应,进而在滤筒表面形成空隙率更高的粗糙面,更有利于钢水中的夹杂物(以Al2O3为主要成分)的吸附。而本体采用镁质材料,也能起到净化钢水的作用。
附图说明
图1是复合质中间包吸渣过滤器的结构示意图。
图中:1-滤筒 2-本体。
具体实施方式
下面结合说明书附图对本发明进行详细地描述,但是应该指出本发明的实施不限于以下的实施方式。
见图1,一种复合质中间包吸渣过滤器,
由滤筒与本体两部份复合而成,滤筒由含碳多孔轻质材料添加结合剂经冷等静压成型,滤筒按质量百分比由以下原料组成:氧化铝空心球40%-70%,莫来石5%-15%,刚玉0-30%,碳化硅5%-15%,石墨3%-10%,轻烧氧化铝粉3%-8%,添加剂一2%-6%,外加上述原料总质量8%-10%的液体酚醛树脂,添加剂一为硼玻璃粉、硅粉、铝粉中的一种或几种组合;滤筒原料中,氧化铝空心球粒径为1-0mm;碳化硅的粒径为200-0目;莫来石的粒径为0.21-0mm;石墨规格为198(粒径100目,碳含量为98%以上);轻烧氧化铝粉的粒径为5-1微米。添加剂一中硼玻璃粉的粒径为200-0目;硅粉的粒径为325目;金属铝粉的粒径为200目。
本体由镁铝质耐火材料浇注而成,本体按质量百分比由以下原料组成:烧结镁砂66%-85%,板状刚玉粉10%-25%,硅灰3%-5%,铝粉0.5-2%,添加剂二0.5%-2%,添加剂二为聚磷酸钠、柠檬酸、防爆纤维、耐热钢纤维的一种或几种组合。本体原料中,烧结镁砂粒径为10-0mm;板状刚玉的粒径为200目。
滤筒的内腔截面积为70-5500mm2(单个内腔),滤筒内腔的总截面积为下水口内腔截面积的3-10倍。
一种复合质中间包吸渣过滤器的生产方法,包括以下步骤:
(1)滤筒的制作
①除液体酚醛树脂外,将按配比称量好的滤筒原料加入混炼机中预混3-5分钟,然后加入液体液体酚醛树脂,将以上材料混炼均匀后,在90-120℃,优选100℃,条件下干燥至适合成型的挥发份值,作为滤筒胚料待用;
②将滤筒胚料加入到胶膜中,震实后密封,在冷等静压机中打压成型,成型压力为50-80MPa。
③成型后的滤筒毛坯在窑炉中预烧,升温速率为15-20℃/h,优选20℃/h,升温至200-240℃;
④将预烧后的毛坯置于烧成窑内,在还原气氛中烧成,烧成温度为1200℃-1300℃,保温时间3小时以上;
(2)中间包吸渣过滤器的制作
①将烧制好的滤筒置于过滤器模具中,且各滤筒固定在对应位置;
②将按配比称量好的本体原料加入搅拌机中,混合3-5分钟后加入水,水的加入量为本体原料质量的4%-5.5%,再搅拌3分钟以上;
③将搅拌好的本体原料加入模具中,使用震动台或震动棒震动成型;成型后的吸渣过滤器经养护后拆模;
④成型后的吸渣过滤器置于干燥窑内进行干燥,升温速率5-15℃/h,升温至300-350℃,保温5小时以上;
⑤干燥后的中间包吸渣过滤器包装即可。
〖实施例1〗
复合质中间包吸渣过滤器,由滤筒和本体复合而成:
滤筒由以下原料按质量百分比配比组成:
本体由以下原料按质量百分比配比组成:
上述复合质中间包吸渣过滤器的生产工艺如下:
(1)滤筒的制作
①将按配比称量好的滤筒原料加入混炼机中预混3分钟,然后加入液体树脂,将以上的材料混炼均匀后,在100℃条件下干燥至适合成型的挥发份值,作为滤筒胚料待用。
②将滤筒胚料加入胶膜中,震实后密封,在冷等静压机中打压成型,成型压力为50-80MPa。
③成型后的滤筒毛坯在窑炉中预烧,升温速率为20℃/h,升温至240℃。
④将预烧后的毛坯置于烧成窑内,还原气氛中烧成,烧成最高温度为1200℃-1300℃,保温时间3小时以上。
(2)中间包吸渣过滤器的制作
①将烧制好的滤筒置于过滤器模具中,固定在其对应的位置。
②将按配比称量好的本体原料加入搅拌机中,混合3分钟后加入称量好的水,再搅拌3分钟以上。
③将搅拌好的本体原料加入模具中,使用振动台或振动棒振动成型。成型后的吸渣过滤器经养护后拆模。
④成型后的吸渣过滤器置于干燥窑内进行干燥,升温速率5-15℃/h,最高温度为350℃,保温5小时以上。
⑤干燥后的中间包吸渣过滤器包装即可。
〖实施例2〗
复合质中间包吸渣过滤器,由滤筒和本体复合而成:
滤筒由以下原料按质量百分比配比组成:
本体由以下原料按质量百分比配比组成:
本实施例中,复合质中间包吸渣过滤器的制造工艺与实施例1相同。
〖实施例3〗
复合质中间包吸渣过滤器,由滤筒和本体复合而成:
滤筒由以下原料按质量百分比配比组成:
本体由以下原料按质量百分比配比组成:
本实施例中,复合质中间包吸渣过滤器的制造工艺与实施例1相同。
〖实施例4〗
复合质中间包吸渣过滤器,由滤筒和本体复合而成:
滤筒由以下原料按质量百分比配比组成:
本体由以下原料按质量百分比配比组成:
本实施例中,复合质中间包吸渣过滤器的制造工艺与实施例1相同。
〖实施例5〗
复合质中间包吸渣过滤器,由滤筒和本体复合而成:
滤筒由以下原料按质量百分比配比组成:
本体由以下原料按质量百分比配比组成:
本实施例中,复合质中间包吸渣过滤器的制造工艺与实施例1相同。
〖实施例6〗
复合质中间包吸渣过滤器,由滤筒和本体复合而成:
滤筒由以下原料按质量百分比配比组成:
本体由以下原料按质量百分比配比组成:
上述复合质中间包吸渣过滤器的生产工艺如下:
(1)滤筒的制作
①将按配比称量好的滤筒原料加入混炼机中预混均匀,然后加入液体树脂,将以上的材料混炼均匀后,在105℃条件下干燥至适合成型的挥发份值,作为滤筒胚料待用。
②将滤筒胚料加入胶膜中,震实后密封,在冷等静压机中打压成型,成型压力为50-80MPa。
③成型后的滤筒毛坯在窑炉中预烧,升温速率为18℃/h,升温至230℃。
④将预烧后的毛坯置于烧成窑内,还原气氛中烧成,烧成最高温度为1200℃,保温时间3小时以上。
(2)中间包吸渣过滤器的制作
①将烧制好的滤筒置于过滤器模具中,固定在其对应的位置。
②将按配比称量好的本体原料加入搅拌机中,混合均匀后加入称量好的水,再搅拌3分钟。
③将搅拌好的本体原料加入模具中,使用振动台或振动棒振动成型。成型后的吸渣过滤器经养护后拆模。
④成型后的吸渣过滤器置于干燥窑内进行干燥,升温速率10℃/h,最高温度为330℃,保温5小时以上。
⑤干燥后的中间包吸渣过滤器包装即可。
Claims (6)
1.一种复合质中间包吸渣过滤器,其特征在于,由滤筒与本体两部份复合而成,所述的滤筒由含碳多孔轻质材料添加结合剂经冷等静压成型,滤筒按质量百分比由以下原料组成:氧化铝空心球40%-70%,莫来石5%-15%,刚玉0-30%,碳化硅5%-15%,石墨3%-10%,轻烧氧化铝粉3%-8%,添加剂一2%-6%,外加上述原料总质量8%-10%的液体酚醛树脂,添加剂一为硼玻璃粉、硅粉、铝粉中的一种或几种组合;
本体由镁铝质耐火材料浇注而成,本体按质量百分比由以下原料组成:烧结镁砂66%-85%,板状刚玉粉10%-25%,硅灰3%-5%,铝粉0.5%-2%,添加剂二0.5%-2%,添加剂二为聚磷酸钠、柠檬酸、防爆纤维、耐热钢纤维的一种或几种组合。
2.根据权利要求书1所述的一种复合质中间包吸渣过滤器,其特征在于,所述的氧化铝空心球粒径为1-0mm;碳化硅的粒径为200-0目;莫来石的粒径为0.21-0mm;刚玉的粒径为0.5-0mm;石墨粒径为100目,碳含量为98%以上;轻烧氧化铝粉的粒径为5-1微米。
3.根据权利要求书1所述的一种复合质中间包吸渣过滤器,其特征在于,所述的添加剂一中硼玻璃粉的粒径为200-0目;硅粉的粒径为325目;金属铝粉的粒径为200目。
4.根据权利要求书1所述的一种复合质中间包吸渣过滤器,其特征在于,所述的滤筒的内腔截面积为70-5500mm2,滤筒的内腔总截面积为下水口内腔截面积的3-10倍。
5.根据权利要求书1所述的一种复合质中间包吸渣过滤器,其特征在于,所述的烧结镁砂粒径为10-0mm;板状刚玉的粒径为200目;铝粉的粒径为200目。
6.根据权利要求书1-5任意一项所述的一种复合质中间包吸渣过滤器的生产方法,其特征在于,包括以下步骤:
(1)滤筒的制作
①除液体酚醛树脂外,将按配比称量好的滤筒原料加入混炼机中预混3-5分钟,然后加入液体液体酚醛树脂,混炼均匀后,在90-120℃条件下干燥,作为滤筒胚料待用;
②将滤筒胚料加入到胶膜中,震实后密封,在冷等静压机中打压成型,成型压力为50-80Mpa;
③成型后的滤筒毛坯在窑炉中预烧,升温速率为15-20℃/h,升温至200-240℃;
④将预烧后的毛坯置于烧成窑内,在还原气氛中烧成,烧成温度为1200℃-1300℃,保温时间3小时以上;
(2)中间包吸渣过滤器的制作
①将烧制好的滤筒置于过滤器模具中;
②将按配比称量好的本体原料加入搅拌机中,混合3-5分钟后加入水,水的加入量为本体原料质量的4%-5.5%,再搅拌3分钟以上;
③将搅拌好的本体原料加入模具中,使用震动台或震动棒震动成型;成型后的吸渣过滤器经养护后拆模;
④成型后的吸渣过滤器置于干燥窑内进行干燥,升温速率5-15℃/h,升温至300-350℃,保温5小时以上;
⑤干燥后的中间包吸渣过滤器包装即可。
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