CN117024128A - 一种铝液输送用轻质流槽的耐火材料及其制备与浇注方法 - Google Patents
一种铝液输送用轻质流槽的耐火材料及其制备与浇注方法 Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 93
- 239000007788 liquid Substances 0.000 title claims abstract description 73
- 239000011819 refractory material Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 37
- 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 26
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 18
- 239000010439 graphite Substances 0.000 claims abstract description 18
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 18
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 13
- 239000004005 microsphere Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 18
- 239000007767 bonding agent Substances 0.000 claims description 15
- 239000004615 ingredient Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 239000008399 tap water Substances 0.000 claims description 8
- 235000020679 tap water Nutrition 0.000 claims description 8
- COXUNHIKBNZLLM-UHFFFAOYSA-H [B+3].[B+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O Chemical compound [B+3].[B+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O COXUNHIKBNZLLM-UHFFFAOYSA-H 0.000 claims description 5
- 230000002902 bimodal effect Effects 0.000 claims description 5
- YZYDPPZYDIRSJT-UHFFFAOYSA-K boron phosphate Chemical compound [B+3].[O-]P([O-])([O-])=O YZYDPPZYDIRSJT-UHFFFAOYSA-K 0.000 claims description 5
- 229910000149 boron phosphate Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000011325 microbead Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000005350 fused silica glass Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910017119 AlPO Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
本发明公开了一种铝液输送用轻质流槽的耐火材料及其制备与浇注方法;所述的耐火材料包括:干料和结合剂;所述的干料包括如下质量分数的组分:氧化铝空心球50.0~70.0%、玻璃空心微珠5.0~15.0%、石墨纤维粉5.0~15.0%、α‑Al2O3微粉5.0~15.0%、铝酸钙水泥5.0~10.0%以及烧结剂1.0~5.0%;所述的结合剂由磷酸二氢铝和水混合而成。本发明提供的耐火材料是一种磷酸盐结合氧化铝空心球基的耐火浇注料,经过搅拌混合、成型、烧成后,得到铝液输送用的轻质流槽,该铝液输送用轻质流槽具有不粘铝、质轻、保温性能优良、中温强度高、杂质含量少等优点,制备的铝液输送用轻质流槽对铝产品生产过程的温度控制和产品质量稳定具有重要意义。
Description
技术领域
本发明涉及耐火材料技术领域,具体涉及一种用于铝液输送用轻质流槽的耐火材料及该耐火材料的制备方法与铝液输送用轻质流槽的浇注方法。
背景技术
在铝合金的生产过程中,常用到不定形耐火材料制作的铝液输送制件,其包括流槽、过滤箱、除气箱等。铝液会与耐火材料发生一系列物理和化学的相互作用,导致流槽的磨损和开裂,无法正常使用。因此,用于铝液输送的流槽制件应满足如下要求:(1)具有不粘铝性能:铝液化学活性高、粘度小,会对接触的耐火材料产生侵蚀反应和渗透行为,因此就要求耐火材料具有铝不润湿性;(2)具有优异的保温性能:铝液在输送过程中会伴随着热量散失,而良好的保温性能则可以减少能量损失,避免铝液凝固;(3)具有良好的力学性能:在铝液输送过程中会持续的冲刷耐火材料(流槽),则必须要求耐火材料具有一定的力学强度,同时频繁的冷热交替对耐火材料的抗热震稳定性能也提出较高要求。
目前,铝酸钙水泥结合的熔融石英基耐火材料是铝液输送中常用的制件材质;该材料具有热膨胀小、热震稳定性良好等优点,其在使用过程中承受冷热温度变化时的体积变化很小;然而高二氧化硅容易与铝液反应,易受到铝侵蚀,使用时需要频繁在表面涂刷氮化硼等涂料以保证材料的抗铝侵蚀能力;同时,这种材料的保温性能一般,需要增加保温层来减少铝液输送过程中的热量损失;其力学性能也一般,当局部发生开裂时,如不及时更换,会导致铝水堆积,严重的会导致衬体破损,铝液流出。
发明内容
本发明的目的在于:针对现有铝液输送用流槽采用的铝酸钙水泥结合的熔融石英基耐火材料所存在的上述问题,而提供了一种用于制作铝液输送用轻质流槽的耐火材料,本发明的这种耐火材料是一种磷酸盐结合氧化铝空心球质的耐火浇注料,利用其制作的流槽具有轻质的特点,同时还具有优异的不粘铝性能、体积稳定性、抗热震稳定性能和良好的保温性能,可以快速烘烤,更适用于铝液输送。
本发明是通过如下技术方案实现的:
一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的耐火材料包括:干料和结合剂;
所述的干料包括如下组分:
氧化铝空心球50.0~70.0wt%、玻璃空心微珠5.0~15.0wt%、石墨纤维粉5.0~15.0wt%、α-Al2O3微粉5.0~15.0wt%、铝酸钙水泥5.0~10.0wt%以及烧结剂1.0~5.0wt%;
所述的结合剂由磷酸二氢铝和水混合而成。
具体的,所述的氧化铝空心球是一种α-Al2O3晶相的高纯轻质氧化铝保温材料。
本发明提供的是一种磷酸盐结合氧化铝空心球质的耐火浇注料,利用该耐火浇注料制造的铝液输送用流槽具有轻质的特性,且该轻质流槽具有优异的不粘铝性能、体积稳定性、抗热震稳定性能、良好的保温性能和力学性能,其解决了现有铝液输送用流槽保温性能较差以及力学性能不佳的问题。
进一步的,一种铝液输送用轻质流槽的耐火材料:所述氧化铝空心球的粒径为0.2~5.0mm。
优选的,氧化铝空心球的粒径为1.0~2.0mm。
进一步的,一种铝液输送用轻质流槽的耐火材料:所述玻璃空心微珠的粒度为50~100目。
进一步的,一种铝液输送用轻质流槽的耐火材料:所述石墨纤维粉的粒度为200~350目。
进一步的,一种铝液输送用轻质流槽的耐火材料:所述的α-Al2O3微粉选用煅烧Al2O3微粉、活性双峰Al2O3微粉中的一种或两种。
进一步的,一种铝液输送用轻质流槽的耐火材料:所述的烧结剂选用磷酸硼、硫酸硼干粉中的一种或两种的混合。
进一步的,一种铝液输送用轻质流槽的耐火材料:所述的结合剂中所述磷酸二氢铝的质量占比为50.0~70.0%,余量为自来水。
进一步的,一种铝液输送用轻质流槽的耐火材料:按质量百分比计,所述结合剂的重量为所述干料重量的10.0~30.0%。
一种铝液输送用轻质流槽的耐火材料的制备方法,其特征在于,方法用于制备上述的耐火材料;
该制备方法包括如下步骤:
S1、按质量百分比,分别称取氧化铝空心球、玻璃空心微珠、石墨纤维粉、α-Al2O3微粉、铝酸钙水泥以及烧结剂;
S2、将上述配料置于搅拌机中干混10~15分钟至配料混合均匀,获得所述干料;
S3、按质量百分比,称取磷酸二氢铝并将其与水混合搅拌5~10分钟,获得所述结合剂;
S4、按质量百分比,将所述结合剂加入到所述干料中搅拌5~10分钟,得到可以用于制作铝液输送用轻质流槽的耐火材料。
一种铝液输送用轻质流槽的浇注方法,其特征在于,该方法采用上述的耐火材料进行浇注;
该浇注方法包括如下步骤:
S1、设计浇注铝液输送用轻质流槽所需的浇注模具;
S2、在所述浇注模具的浇注面上涂刷脱模剂,将所述耐火材料倾倒至所述浇注模具中,振动5~10分钟,收光浇注面;自然放置8~24小时,获得铝液输送轻质流槽预制件;
S3、脱模后,将所述铝液输送轻质流槽预制件置于烘干窑内,然后按照≤50℃/h的速率升温至750~850℃保温2~4小时,自然冷却至室温后,取出得到铝液输送用轻质流槽。
本发明的有益效果:
(1)本发明提供的是一种磷酸盐结合氧化铝空心球基耐火浇注料,经过搅拌混合、成型、烧成后,得到铝液输送用的轻质流槽,该轻质流槽具有不粘铝、质轻、保温性能优良、中温强度高、杂质含量少等优点,该轻质流槽对铝产品生产过程的温度控制和产品质量稳定具有重要意义。
(2)在本发明提供的一种用于浇注铝液输送用轻质流槽的耐火材料中采用的氧化铝空心球是一种α-Al2O3晶相的高纯轻质氧化铝保温材料,将其引入到耐火材料中主要作用是利用其高纯铝、质轻、强度高、中空结构、体积稳定性好等特性,可以避免与铝液反应、确保流槽具有良好的耐冲刷性能以及良好的保温性能和热震稳定性。
(3)本发明的耐火材料中采用的玻璃空心微珠是一种硅酸铝空心结构,其具有耐高温、质轻的特点,引入材料中可以通过降低体积密度从而降低热导率,起到保温的作用。
(4)本发明在耐火材料中加入的石墨纤维粉是一种优良的铝不润湿添加剂,其还具有质轻、强度高的特点,引入材料中可以改善耐火材料的抗侵蚀性能,解决了现有铝液输送流槽容易与铝液反应,易受到铝侵蚀的问题。
(5)在本发明的耐火材料中加入的α-Al2O3微粉的主要作用一方面是填充空隙,另一方面是与结合剂在500℃以上反应生成AlPO4晶相,以提高该耐火材料的热震稳定性和高温强度。
(6)在本发明的耐火材料中由于氧化铝空心球、玻璃空心微珠和石墨纤维粉的引入,降低了该耐火材料的体积密度,使得以该耐火材料浇注的铝液输送用流槽具有轻质的特点。同时,为了确保耐火材料具有优良的高温强度,本发明通过引入烧结剂(磷酸硼),可以降低结合剂(磷酸二氢铝)和各类磷酸盐产物的烧结温度,形成液相,一方面填充空隙避免铝液渗透,另一方面大幅提升该耐火材料在700~800℃范围内的高温强度,从而满足铝液输送的使用工况要求。
具体实施方式
下面将结合具体实施例,对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明的一部分实施例,而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的,决不作为对本发明及其应用或使用的任何限制。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
提供一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的耐火材料包括干料和结合剂;按质量百分比计,所述结合剂的重量为所述干料重量的20.0%;
其中:所述的干料包括如下组分:
氧化铝空心球60.0wt%、玻璃空心微珠10.0wt%、石墨纤维粉5.0wt%、α-Al2O3微粉15.0wt%、铝酸钙水泥5.0wt%、烧结剂5.0wt%;
所述的结合剂包括如下质量分数的组分:磷酸二氢铝60.0wt%和自来水40.0wt%;
具体的,上述所选用的氧化铝空心球的粒径为2.0mm;所述的玻璃空心微珠的粒度为80目;所述的石墨纤维粉的粒度为250目;所述的α-Al2O3微粉选用活性双峰Al2O3微粉(活性双峰Al2O3微粉为青岛安迈生产的CL370);所述烧结剂选用磷酸硼。
上述实施例1提供的一种铝液输送用轻质流槽的耐火材料的制备方法,包括如下具体步骤:
S1、按质量百分比,分别称取上述提到的氧化铝空心球、玻璃空心微珠、石墨纤维粉、活性双峰Al2O3微粉、铝酸钙水泥以及磷酸硼;
S2、将上述配料置于搅拌机中干混10分钟至配料混合均匀,获得所述干料;
S3、按质量百分比,称取磷酸二氢铝并将其与自来水混合搅拌5分钟,获得所述结合剂;
S4、按质量百分比(结合剂的重量为干料重量的20.0%),将所述结合剂加入到所述干料中搅拌8分钟,得到可以用于制作铝液输送用轻质流槽的耐火材料。
实施例2
提供一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的耐火材料包括干料和结合剂;按质量百分比计,所述结合剂的重量为所述干料重量的30.0%;
其中:所述的干料包括如下组分:
氧化铝空心球50.0wt%、玻璃空心微珠15.0wt%、石墨纤维粉15.0wt%、α-Al2O3微粉9.0wt%、铝酸钙水泥10.0wt%、烧结剂1.0wt%;
所述的结合剂包括如下质量分数的组分:磷酸二氢铝50.0wt%和自来水50.0wt%;
具体的,上述所选用的氧化铝空心球的粒径为0.2mm;所述的玻璃空心微珠的粒度为50目;所述的石墨纤维粉的粒度为350目;所述α-Al2O3微粉选用煅烧级Al2O3微粉(煅烧Al2O3微粉为青岛安迈生产的CT9FG);所述烧结剂选用硫酸硼干粉。
上述实施例2提供的一种铝液输送用轻质流槽的耐火材料的制备方法,包括如下具体步骤:
S1、按质量百分比,分别称取上述提到的氧化铝空心球、玻璃空心微珠、石墨纤维粉、煅烧Al2O3微粉、铝酸钙水泥以及硫酸硼干粉;
S2、将上述配料置于搅拌机中干混10分钟至配料混合均匀,获得所述干料;
S3、按质量百分比,称取磷酸二氢铝并将其与自来水混合搅拌8分钟,获得所述结合剂;
S4、按质量百分比(结合剂的重量为干料重量的30.0%),将所述结合剂加入到所述干料中搅拌5分钟,得到可以用于制作铝液输送用轻质流槽的耐火材料。
实施例3
提供一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的耐火材料包括干料和结合剂;按质量百分比计,所述结合剂的重量为所述干料重量的10.0%;
其中:所述的干料包括如下组分:
氧化铝空心球70.0wt%、玻璃空心微珠5.0wt%、石墨纤维粉10.0wt%、α-Al2O3微粉5.0wt%、铝酸钙水泥7.0wt%、烧结剂3.0wt%;
所述的结合剂包括如下质量分数的组分:磷酸二氢铝70.0wt%和自来水30.0wt%;
具体的,上述所选用的氧化铝空心球的粒径为5.0mm;所述的玻璃空心微珠的粒度为100目;所述的石墨纤维粉的粒度为200目;所述的α-Al2O3微粉选用质量比1:1的煅烧级Al2O3微粉与活性双峰Al2O3微粉的混合物;所述的烧结剂选用质量比1:1的磷酸硼与硫酸硼干粉的混合物。
上述实施例3提供的一种铝液输送用轻质流槽的耐火材料的制备方法,包括如下具体步骤:
S1、按质量百分比,分别称取上述提到的氧化铝空心球、玻璃空心微珠、石墨纤维粉、α-Al2O3微粉、铝酸钙水泥以及烧结剂;
S2、将上述配料置于搅拌机中干混15分钟至配料混合均匀,获得所述干料;
S3、按质量百分比,称取磷酸二氢铝并将其与自来水混合搅拌10分钟,获得所述结合剂;
S4、按质量百分比(结合剂的重量为干料重量的10.0%),将所述结合剂加入到所述干料中搅拌10分钟,得到可以用于制作铝液输送用轻质流槽的耐火材料。
应用例1
利用上述实施例1提供的耐火材料来浇注铝液输送用轻质流槽,其浇注方法包括如下具体步骤:
S1、首先,根据铝液输送用轻质流槽的外形,方形设计一种用于浇注铝液输送用轻质流槽所需的浇注模具;
S2、将所述浇注模具水平放置,然后在所述浇注模具的浇注面上涂刷脱模剂,然后将上述实施例1提供的耐火材料倾倒至该浇注模具中,用强制振动棒辅助振动10分钟后,收光浇注面;自然放置12小时,冷却定型,获得具有一定强度的铝液输送轻质流槽预制件;
S3、脱模后,将所得铝液输送轻质流槽预制件置于烘干窑内,然后按照50℃/h的速率升温至800℃保温3小时,自然冷却至室温后,取出得到铝液输送用轻质流槽。
测试:
对上述实施例1中的耐火材料的性能进行测试,其测试结果如下:
(1)测得上述实施例1提供的耐火材料,其在600℃下的导热系数<0.4W/m*k,说明了本发明提供的耐火材料具有较好的保温性能,因此用其制备的铝液输送用流槽也会具有相应的保温性能;
(2)测得实施例1的耐火材料其体积密度<1.5g/cm3,说明了本发明提供的耐火材料具有轻质的特点,因此用其制备的铝液输送用流槽也将具有相应的轻质特性;
(3)测得实施例1的耐火材料制备的铝液输送用轻质流槽其耐压强度>20MPa,表明其具有良好的力学性能;
(4)测得实施例1的耐火材料在800℃下加热3小时后,其加热线变化<0.10%,可以证明该耐火材料具有较好的热稳定性。
上述为本发明的较佳实施例仅用于解释本发明,并不用于限定本发明。凡由本发明的技术方案所引伸出的显而易见的变化或变动仍处于本发明的保护范围之中。
Claims (10)
1.一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的耐火材料包括:干料和结合剂;
所述的干料包括如下组分:
氧化铝空心球50.0~70.0wt%、玻璃空心微珠5.0~15.0wt%、石墨纤维粉5.0~15.0wt%、α-Al2O3微粉5.0~15.0wt%、铝酸钙水泥5.0~10.0wt%以及烧结剂1.0~5.0wt%;
所述的结合剂由磷酸二氢铝和水混合而成。
2.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,所述氧化铝空心球的粒径为0.2~5.0mm。
3.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,所述玻璃空心微珠的粒度为50~100目。
4.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,所述石墨纤维粉的粒度为200~350目。
5.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的α-Al2O3微粉选用煅烧Al2O3微粉、活性双峰Al2O3微粉中的一种或两种。
6.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的烧结剂选用磷酸硼、硫酸硼干粉中的一种或两种的混合。
7.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,所述的结合剂中所述磷酸二氢铝的质量占比为50.0~70.0%,余量为自来水。
8.根据权利要求1所述的一种铝液输送用轻质流槽的耐火材料,其特征在于,按质量百分比计,所述结合剂的重量为所述干料重量的10.0~30.0%。
9.一种铝液输送用轻质流槽的耐火材料的制备方法,其特征在于,方法用于制备权利要求1~8任一项所述的耐火材料;
该制备方法包括如下步骤:
S1、按质量百分比,分别称取氧化铝空心球、玻璃空心微珠、石墨纤维粉、α-Al2O3微粉、铝酸钙水泥以及烧结剂;
S2、将上述配料置于搅拌机中干混10~15分钟至配料混合均匀,获得所述干料;
S3、按质量百分比,称取磷酸二氢铝并将其与水混合搅拌5~10分钟,获得所述结合剂;
S4、按质量百分比,将所述结合剂加入到所述干料中搅拌5~10分钟,得到可用于制作铝液输送用轻质流槽的耐火材料。
10.一种铝液输送用轻质流槽的浇注方法,其特征在于,该方法采用权利要求1~8任一项所述的耐火材料进行浇注;
该浇注方法包括如下步骤:
S1、设计浇注铝液输送用轻质流槽所需的浇注模具;
S2、在所述浇注模具的浇注面上涂刷脱模剂,将所述耐火材料倾倒至所述浇注模具中,振动5~10分钟,收光浇注面;自然放置8~24小时,获得铝液输送轻质流槽预制件;
S3、脱模后,将所述铝液输送轻质流槽预制件置于烘干窑内,然后按照≤50℃/h的速率升温至750~850℃保温2~4小时,自然冷却至室温后,取出得到铝液输送用轻质流槽。
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