CN116239370A - 用于低氧铜杆生产中延长流槽寿命的99浇注料及制备方法 - Google Patents
用于低氧铜杆生产中延长流槽寿命的99浇注料及制备方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 16
- 239000010949 copper Substances 0.000 title claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 16
- 239000001301 oxygen Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 97
- 239000000843 powder Substances 0.000 claims abstract description 94
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 30
- 239000010431 corundum Substances 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 28
- 235000019353 potassium silicate Nutrition 0.000 claims description 19
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 16
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 15
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 15
- 229910052596 spinel Inorganic materials 0.000 claims description 15
- 239000011029 spinel Substances 0.000 claims description 15
- 239000000395 magnesium oxide Substances 0.000 claims description 14
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
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- 229910021487 silica fume Inorganic materials 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
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- 229920001568 phenolic resin Polymers 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 5
- 239000007767 bonding agent Substances 0.000 claims description 5
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 13
- 230000000052 comparative effect Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
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- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000007791 liquid phase Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
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Abstract
本发明公开了用于低氧铜杆生产中延长流槽寿命的99浇注料,99浇注料的原料按重量百分比计包括:7~15%的电熔白刚玉粉,5~11%的α‑Al2O3超微粉,5~11%的电熔尖晶石细粉,1~4%的辅助剂,6~15%结合剂,0.1~0.4%的减水剂,余量为烧结板状刚玉颗粒;99浇注料的制备方法为:S1、预制,S2、初次混合,S3、混料制备;本发明制备浇注料,通过严格的控制各步骤原料种类、粒度及热处理制度等工序,使得原料颗粒之间能够紧密接触,同时利用了不同材料的结构特征和不同粒度的原料之间的颗粒级配优点,使得所制备的浇注料具有常温耐压强度大、抗热震性高等优点。
Description
技术领域
本发明涉及浇注材料技术领域,具体是涉及用于低氧铜杆生产中延长流槽寿命的99浇注料及制备方法。
背景技术
流槽是低氧铜杆生产中用于输送熔融的功能耐火材料,它具有承接、导向、分流、输送、分类控制等关键作用,与闸板配合使用可以实现高温熔液流向及流速控制,以满足低氧铜杆的生产需求。由于流槽直接与熔液进行接触,因此,其质量好坏直接决定了生产能否顺利进行、低氧铜杆的质量。
流槽是生产过程中的消耗性材料,需要定期更换。目前低氧铜杆生产中的流槽在使用过程中经频繁的急冷急热以及熔液的冲击,导致流槽表面开裂,流槽蚀损较快破损严重;因此,现设计一种抗热震性强的用于低氧铜杆生产中延长流槽寿命的99浇注料及制备方法。
发明内容
为解决上述技术问题,本发明提供了用于低氧铜杆生产中延长流槽寿命的99浇注料及制备方法。
本发明的技术方案是:用于低氧铜杆生产中延长流槽寿命的99浇注料,所述99浇注料的原料按重量百分比计包括:7~15%的电熔白刚玉粉,5~11%的α-Al2O3超微粉,5~11%的电熔尖晶石细粉,1~4%的辅助剂,6~15%结合剂,0.1~0.4%的减水剂,余量为烧结板状刚玉颗粒。
说明:电熔白刚玉粉化学稳定性较好,抗酸碱的能力强,在各种金属液中不会发生化学反应和变化,烧结板状刚玉颗粒具有耐冲刷性、耐热震稳定性、强度高、韧性好、化学性能稳定等优点,使产品的抗渣渗透和热震稳定性能明显增强;α-Al2O3超微粉在高温下可以部分转化为刚玉相,改善产品组织结构,使原料液相粘性升高,能够有效抑制渣的渗透,可以优化浇注料的组织结构又可以保证浇注料的中、低温强度;电熔尖晶石细粉具有抗剥落能力强和抗热震稳定性好等优良性能;采用氧化铝含量极高的电熔白刚玉粉以及烧结板状刚玉颗粒为基料,加入α-Al2O3超微粉、电熔尖晶石细粉、辅助剂以及结合剂,提高了浇注料的强度、抗热震性以及抗剥落性,使浇注料制备的流槽内存在一定数量的气孔,并有效的降低弹性模量,增强了流槽抵抗不断地温度波动而变形的能力,提高流槽的抗热震性以及抗开裂性,进而提高流槽的使用寿命。
进一步地,所述结合剂由组分A以及组分B构成,按重量比组分A:组分B=3:1;
所述组分A按重量百分比计包括:50~60%的电熔镁砂细粉,20~30%的SiO2微粉,0.5~1.5%的氧化钇微粉,余量为热固性酚醛树脂;
所述组分B按重量百分比计包括:30~40%的水玻璃,40~50%的硅灰超微粉,余量为Secar71水泥。
说明:组分A中,电熔镁砂细粉与SiO2微粉结合通过SiO2在水化过程中与MgO发生反应,逐渐在浇注料表面形成MgO-SiO2-H2O,在浇注料表面形成镁氧硅链状网络结构,提高浇注料的抗热震性以及抗冲刷性;氧化钇具有耐热性好、抗腐蚀性强的优点;热固性酚醛树脂能够有效降低弹性模量,弹性模量越小,能缓解和释放热应力,进而能显著的提高浇注料的抗热震稳定性。组分B中,水玻璃硬化体的结构致密、强度高;硅灰超微粉它可以显著的改善浇注料的流动性能,并具有极好的减水性,凝结性、良好的高温性能,Secar71水泥能够提高浇注料的烧前强度,促进产品凝固。
进一步地,所述减水剂为三聚磷酸钠。
说明:三聚磷酸钠中的分子可吸附在各原料颗粒表面,通过吸附发生相互作用而破坏颗粒间的絮凝状,得到分散性和流动性好的浆体,通过钠离子减少水化层分子数,从而释放出多余吸附的水,增加泥浆中自由水的含量,达到减水效果;同时,三聚磷酸钠可以提高水玻璃的硬化强度,降低水玻璃的高温残留强度,改善其溃散性,易溶于水玻璃,可以提高水玻璃粘性。
进一步地,所述辅助剂由不锈钢纤维与氧化铈微粉混合而成,按重量分数计不锈钢纤维:氧化铈微粉=3:2。
说明:不锈钢纤维具有高强度耐高温、抗冲击、抗热震、耐磨性能好等特点,氧化铈具有极低的线膨胀系数,抗热震性;加入此辅助剂能够提高制备的浇注料抗热震性,使得浇注料制备的流槽具有良好的气孔率。
进一步地,所述水玻璃模数为2.4-3.2。
说明:水玻璃模数越大,氧化硅含量越多,水玻璃黏度增大,易于分解硬化,粘结力增大,使得浇注料结构致密、强度高。
进一步地,所述烧结板桩刚玉颗粒的粒径为1-3mm,所述电熔白玉刚粉的粒径为0.5-1mm,所述电熔尖晶石细粉、电熔镁砂细粉的粒径均为0.064-0.1mm,所述SiO2微粉、氧化钇微粉的粒径均为0.002-0.064mm,所述α-Al2O3超微粉、硅灰超微粉的粒径均为0.001-0.002mm。
说明:不同系不同配比中原料的粒径分布必须综合考虑确定最佳加入量,原料的粒度及其分布对浇注料的流动性和物理性能影响较大,选用上述粒径的原料所制备的浇注料物理性能更优。
进一步地,氧化铈微粉的粒径为0.002-0.064mm。
说明:选用与本申请其他微粉相同粒径的氧化铈,更易于提升浇注料的室温韧性。
进一步地,所述组分A的制备方法为:
将组分A的原料混合均匀后,在1300-1600℃下烧结2-3小时,然后将烧结产物破碎、研磨,得到粒径为0.064-0.1mm的组分A。
说明:上述制备的组分A高温体积稳定性好,抗热震稳定性能。
进一步地,所述99浇注料的制备方法为:
S1、预制
将电熔白刚玉粉、α-Al2O3超微粉、电熔尖晶石细粉、烧结板状刚玉颗粒以及80%的组分B干混均匀得到混合体造粒,在1550-1650℃下热处理2-3小时,筛分得到粒径为3-5mm的A颗粒以及粒径为1-3mm的B颗粒;
S2、初次混合
将A颗粒、组分A以及辅助剂混合均匀,置于110-140MPa下压制成型,随后在1400-1500℃下热处理2-3小时,最后经破碎、研磨到粒径为0.064-0.1mm的C颗粒;
向剩余20%的B组分中加入水制成浆液,将B颗粒加入浆液中充分混合,得到包裹浆液的D颗粒;
S3、混料制备:
将C颗粒、D颗粒以及减水剂混合均匀,振动成型,在温度为95-105℃下保温15-35小时,得到99浇注料。
说明:将烧结一次的组分A与、辅助剂以及A颗粒进行混合热处理,通过对组分A二次烧结有利于改善浇注料制备的流槽的气孔率以及提高热导率,并减少在流槽使用过程中产生的裂纹,提高流槽的使用寿命;上述方法制备的C颗粒以及D颗粒,具有优良的抗热震性高以及重烧线变化率低的优良特性;通过严格的控制各步骤原料种类、粒度及热处理制度等工序,使得原料颗粒之间的能够紧密接触,同时利用了不同材料的结构特征和不同粒度的原料之间的颗粒级配优点,依次方法制备的浇注料具有常温耐压强度大、抗热震性高等优点。
进一步地,步骤S2中,制备的浆液质量浓度为2-7%。
说明:控制浆液浓度在2-7%之间,使得黏性足够将组分B粘附在B颗粒表面。
本发明的有益效果是:
(1)本发明制备浇注料,通过严格的控制各步骤原料种类、粒度及热处理制度等工序,使得原料颗粒之间的能够紧密接触,同时利用了不同材料的结构特征和不同粒度的原料之间的颗粒级配优点,使得所制备的浇注料具有常温耐压强度大、抗热震性高等优点。
(2)将烧结一次的组分A与、辅助剂以及A颗粒进行混合热处理,通过对组分A二次烧结有利于改善浇注料制备的流槽的气孔率以及提高热导率,并减少在流槽使用过程中产生的裂纹,提高流槽的使用寿命。
具体实施方式
下面结合具体实施方式来对本发明进行更进一步详细的说明,以更好地体现本发明的优势。
实施例1
所述99浇注料的原料按重量百分比计包括:11%的电熔白刚玉粉,8%的α-Al2O3超微粉,8%的电熔尖晶石细粉,2%的辅助剂,10%结合剂,0.2%的减水剂,余量为烧结板状刚玉颗粒;
所述结合剂由组分A以及组分B构成,按重量比组分A:组分B=3:1;
所述组分A按重量百分比计包括:55%的电熔镁砂细粉,25%的SiO2微粉,1.0%的氧化钇微粉,余量为热固性酚醛树脂;
所述组分B按重量百分比计包括:35%的水玻璃,45%的硅灰超微粉,余量为Secar71水泥;
所述减水剂为三聚磷酸钠;
所述辅助剂由不锈钢纤维与氧化铈微粉混合而成,按重量分数计不锈钢纤维:氧化铈微粉=3:2;
所述水玻璃模数为2.8;
所述烧结板桩刚玉颗粒的粒径为1.8-2.2mm,所述电熔白玉刚粉的粒径为0.65-0.85mm,所述电熔尖晶石细粉、电熔镁砂细粉的粒径均为0.075-0.085mm,所述SiO2微粉、氧化钇微粉的粒径均为0.015-0.028mm,所述α-Al2O3超微粉、硅灰超微粉的粒径均为0.0014-0.0016mm;
氧化铈微粉的粒径为0.015-0.028mm;
所述组分A的制备方法为:
将组分A的原料混合均匀后,在1450℃下烧结2.5小时,然后将烧结产物破碎、研磨,得到粒径为0.075-0.085mm的组分A。
所述99浇注料的制备方法为:
S1、预制
将电熔白刚玉粉、α-Al2O3超微粉、电熔尖晶石细粉、烧结板状刚玉颗粒以及80%的组分B干混均匀得到混合体造粒,在1600℃下热处理2.5小时,筛分得到粒径为3.8-4.2mm的A颗粒以及粒径为1.7-2.0mm的B颗粒;
S2、初次混合
将A颗粒、组分A以及辅助剂混合均匀,置于125MPa下压制成型,随后在1450℃下热处理2-3小时,最后经破碎、研磨到粒径为0.075-0.085mm的C颗粒;
向剩余20%的B组分中加入水制成浆液,制备的浆液质量浓度为5%,将B颗粒加入浆液中充分混合,得到包裹浆液的D颗粒;
S3、混料制备:
将C颗粒、D颗粒以及减水剂混合均匀,振动成型,在温度为100℃下保温20小时,得到99浇注料。
实施例2
本实施例与实施例1基本相同,与其不同之处在于,所述99浇注料的原料按重量分数计包括:7%的电熔白刚玉粉,5%的α-Al2O3超微粉,5%的电熔尖晶石细粉,1%的辅助剂,6%结合剂,0.1%的减水剂,余量为烧结板状刚玉颗粒。
实施例3
本实施例与实施例1基本相同,与其不同之处在于,所述99浇注料的原料按重量分数计包括:15%的电熔白刚玉粉,11%的α-Al2O3超微粉,11%的电熔尖晶石细粉,4%的辅助剂,15%结合剂,0.4%的减水剂,余量为烧结板状刚玉颗粒。
实施例4
本实施例与实施例1基本相同,与其不同之处在于,所述组分A按重量分数计包括:50%的电熔镁砂细粉,20%的SiO2微粉,0.5%的氧化钇微粉,余量为热固性酚醛树脂。
实施例5
本实施例与实施例1基本相同,与其不同之处在于,所述组分A按重量分数计包括:60%的电熔镁砂细粉,30%的SiO2微粉,1.5%的氧化钇微粉,余量为热固性酚醛树脂。
实施例6
本实施例与实施例1基本相同,与其不同之处在于,所述组分B按重量分数计包括:30%的水玻璃,40%的硅灰超微粉,余量为Secar71水泥。
实施例7
本实施例与实施例1基本相同,与其不同之处在于,所述组分B按重量分数计包括:40%的水玻璃,50%的硅灰超微粉,余量为Secar71水泥。
实施例8
本实施例与实施例1基本相同,与其不同之处在于,所述水玻璃模数为2.4。
实施例9
本实施例与实施例1基本相同,与其不同之处在于,所述水玻璃模数为3.2。
实施例10
本实施例与实施例1基本相同,与其不同之处在于,所述烧结板桩刚玉颗粒的粒径为1-1.3mm,所述电熔白玉刚粉的粒径为0.52-0.61mm,所述电熔尖晶石细粉、电熔镁砂细粉的粒径均为0.064-0.072mm,所述SiO2微粉、氧化钇微粉、氧化铈微粉的粒径均为0.002-0.009mm,所述α-Al2O3超微粉、硅灰超微粉的粒径均为0.0011-0.0013mm。
实施例11
本实施例与实施例1基本相同,与其不同之处在于,所述烧结板桩刚玉颗粒的粒径为2.6-3mm,所述电熔白玉刚粉的粒径为0.9-1mm,所述电熔尖晶石细粉、电熔镁砂细粉的粒径均为0.09-0.1mm,所述SiO2微粉、氧化钇微粉、氧化铈微粉的粒径均为0.056-0.064mm,所述α-Al2O3超微粉、硅灰超微粉的粒径均为0.0018-0.002mm。
实施例12
本实施例与实施例1基本相同,与其不同之处在于,所述组分A的制备方法为:
将组分A原料混合均匀后,在1450℃下烧结2.5小时,然后将烧结产物破碎、研磨,得到粒径为0.064-0.076mm的组分A。
实施例13
本实施例与实施例1基本相同,与其不同之处在于,所述组分A的制备方法为:
将组分A原料混合均匀后,在1450℃下烧结2.5小时,然后将烧结产物破碎、研磨,得到粒径为0.09-0.1mm的组分A。
实施例14
本实施例与实施例1基本相同,与其不同之处在于,在步骤S1中,筛分得到粒径为3.1-3.8mm的A颗粒以及粒径为1.1-1.4mm的B颗粒。
实施例15
本实施例与实施例1基本相同,与其不同之处在于,在步骤S1中,筛分得到粒径为4.2-5mm的A颗粒以及粒径为2.3-3mm的B颗粒。
实施例16
本实施例与实施例1基本相同,与其不同之处在于,在步骤S2中,最后经破碎、研磨到粒径为0.064-0.081mm的C颗粒。
实施例17
本实施例与实施例1基本相同,与其不同之处在于,在步骤S2中,最后经破碎、研磨到粒径为0.094-0.1mm的C颗粒。
实施例18
本实施例与实施例1基本相同,与其不同之处在于,步骤S2中,制备的浆液浓度为2%。
实施例19
本实施例与实施例1基本相同,与其不同之处在于,步骤S2中,制备的浆液浓度为7%。
实验例
针对各个实施例所制备的浇注料,测量其物理性能,具体探究如下:
探究浇注料原料的不同配比对浇注料所制备的流槽的影响。
以实施例1-9、18、19做为实验例对比;
同时设置对比例1:制备浇注料原料没有加入辅助剂,其他条件均不变;
对比例2:结合剂由组分A制成,其他条件均不变;
对比例3:结合剂由组分B制成,其他条件均不变;
对比例4:所述99浇注料的制备方法为:将电熔白刚玉粉、α-Al2O3超微粉、电熔尖晶石细粉、烧结板状刚玉颗粒、辅助剂、结合剂以及减水剂混均匀后振动成型,在温度为30℃、相对湿度为90%的条件下养护25小时,升温至100℃保温20小时,得到浇注料。
浇注料制备的流槽经110℃×24h烘后耐压强度,1200℃×3h烧后线变化率、显气孔率,结果如表1所示:
表1各配料下浇注料所制备的流槽的性能测试表
由上表1结果可以看出,不同的原料的不同配比对浇注料的性能有着一定影响,对浇注料所制备的流槽物理性能有影响;其中,实施例1制备的浇注料所制备的流槽线变化率低,显气孔率高,抗热震性高,从而使得流槽的使用寿命更高;
同时,通过对比例1与实施例1对比可以看出,在制备浇注料时没有加入辅助剂时,所制备的流槽的线变化率明显升高,显气孔率变大,抗热震性降低,导致制备的流槽寿命低,因此,本申请的辅助剂对流槽性能的提升较为明显;通过对比例2、3与实施例1可以看出,单独使用组分A或组分B,制备的流槽线变化率高、显气孔率高、抗热震性降低;通过对比例4与实施例1对比可以看出,实施例1的制备方法得的浇注料所制备的流槽线变化率低、显气孔率低、抗热震性高,寿命更长;所以,本申请的结合剂组分以及浇注料的制备方法对浇注料的提升明显。
Claims (10)
1.用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述99浇注料的原料按重量百分比计包括:7~15%的电熔白刚玉粉,5~11%的α-Al2O3超微粉,5~11%的电熔尖晶石细粉,1~4%的辅助剂,6~15%结合剂,0.1~0.4%的减水剂,余量为烧结板状刚玉颗粒。
2.如权利要求1所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述结合剂由组分A以及组分B构成,按重量比组分A:组分B=3:1;
所述组分A按重量百分比计包括:50~60%的电熔镁砂细粉,20~30%的SiO2微粉,0.5~1.5%的氧化钇微粉,余量为热固性酚醛树脂;
所述组分B按重量百分比计包括:30~40%的水玻璃,40~50%的硅灰超微粉,余量为Secar71水泥。
3.如权利要求1所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述减水剂为三聚磷酸钠。
4.如权利要求1所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述辅助剂由不锈钢纤维与氧化铈微粉混合而成,按重量分数计不锈钢纤维:氧化铈微粉=3:2。
5.如权利要求2所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述水玻璃模数为2.4-3.2。
6.如权利要求2所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述烧结板桩刚玉颗粒的粒径为1-3mm,所述电熔白玉刚粉的粒径为0.5-1mm,所述电熔尖晶石细粉、电熔镁砂细粉的粒径均为0.064-0.1mm,所述SiO2微粉、氧化钇微粉的粒径均为0.002-0.064mm,所述α-Al2O3超微粉、硅灰超微粉的粒径均为0.001-0.002mm。
7.如权利要求4所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,氧化铈微粉的粒径为0.002-0.064mm。
8.如权利要求2所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述组分A的制备方法为:
将组分A的原料混合均匀后,在1300-1600℃下烧结2-3小时,然后将烧结产物破碎、研磨,得到粒径为0.064-0.1mm的组分A。
9.如权利要求2所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述99浇注料的制备方法为:
S1、预制
将电熔白刚玉粉、α-Al2O3超微粉、电熔尖晶石细粉、烧结板状刚玉颗粒以及80%的组分B干混均匀得到混合体造粒,在1550-1650℃下热处理2-3小时,筛分得到粒径为3-5mm的A颗粒以及粒径为1-3mm的B颗粒;
S2、初次混合
将A颗粒、组分A以及辅助剂混合均匀,置于110-140MPa下压制成型,随后在1400-1500℃下热处理2-3小时,最后经破碎、研磨到粒径为0.064-0.1mm的C颗粒;
向剩余20%的B组分中加入水制成浆液,将B颗粒加入浆液中充分混合,得到包裹浆液的D颗粒;
S3、混料制备:
将C颗粒、D颗粒以及减水剂混合均匀,振动成型,在温度为95-105℃下保温15-35小时,得到99浇注料。
10.如权利要求1所述的用于低氧铜杆生产中延长流槽寿命的99浇注料,其特征在于,所述辅助剂由不锈钢纤维与氧化铈微粉混合而成,按重量分数计不锈钢纤维:氧化铈微粉=3:2。
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