CN115231908A - 制备锂电池正极材料窑炉用高纯氧化铝砖及其制备方法 - Google Patents
制备锂电池正极材料窑炉用高纯氧化铝砖及其制备方法 Download PDFInfo
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000011449 brick Substances 0.000 title claims abstract description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 27
- 239000010405 anode material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 60
- 239000011230 binding agent Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000006260 foam Substances 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000000462 isostatic pressing Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 238000009775 high-speed stirring Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- 239000010406 cathode material Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 3
- 238000007580 dry-mixing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
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Abstract
本发明公开了制备锂电池正极材料窑炉用高纯氧化铝砖及其制备方法,该高纯氧化铝砖的原料组成如下:氧化铝细粉30%‑50%、氧化铝微粉20%‑40%、纳米级氧化铝粉20%‑24%、结合剂6%‑10%,制备锂电池正极材料窑炉用高纯氧化铝砖的制备方法,将氧化铝细粉、氧化铝微粉、纳米级氧化铝粉以及硬质泡沫球加入高速搅拌机进行高速搅拌,实现各原料充分混合均匀;加入结合剂再次充分搅拌,得到混合料;将混合料通过等静压压制成型,成型胚体经烘干后放入高温窑炉中加热至1550℃进行烧结,烧成后对其进行切磨。材料由氧化铝细粉、氧化铝微粉与纳米级氧化铝粉复合而成,含有大量亚微米孔、少量纳米孔和微米孔,微小气孔赋予材料极低热导率,增加保温效果,较好实现节能减排。
Description
技术领域
本发明属于制备锂电池正极材料窑炉用耐火保温材料技术领域,特别是涉及制备锂电池正极材料窑炉用高纯氧化铝砖及其制备方法。
背景技术
锂电池正极材料生产过程需要经过高温烧成,由于烧成过程普通铝硅系耐火材料中的二氧化硅会导致电池发热,因此这种窑炉在选用耐火材料时,必须使用纯Al2O3制成的砖,Al2O3的含量>99%,尽量回避二氧化硅。
烧锂基正极材料的窑炉工作温度一般在900℃以内,不会超过1000℃。在用的Al2O3含量>99%的砖密度在1.5g/cm3左右,使用温度可以达到1650℃,400℃导热系数在0.8w/(m·k),制作成本很高,保温性能差,重量大并不适用,和用户要求的节能环保的理念不太吻合,但也没有办法,因为没有更好的选择。
发明内容
为了克服现有锂基正极材料烧成窑炉的内衬砖使用缺陷,本发明提供了制备锂电池正极材料窑炉用高纯氧化铝砖及其制备方法。
本发明所采用的技术方案是:
制备锂电池正极材料窑炉用高纯氧化铝砖,原料组成如下:氧化铝细粉30%-50%、氧化铝微粉20%-40%、纳米级氧化铝粉20%-24%、结合剂6%-10%。
优选地:氧化铝细粉40%、氧化铝微粉30%、纳米级氧化铝粉22%、结合剂8%。
优选地:氧化铝细粉30%、氧化铝微粉40%、纳米级氧化铝粉20%、结合剂10%。
优选地:氧化铝细粉50%、氧化铝微粉20%、纳米级氧化铝粉24%、结合剂6%。
优选地:氧化铝细粉为氧化铝含量≥99%,细度D50≤0.3微米。
优选地:氧化铝微粉为氧化铝含量≥99%,细度D50≤0.15微米。
优选地:纳米级氧化铝粉为氧化铝含量≥99%。
优选地:结合剂为聚合氯化铝,烧后释放氯气变为氧化铝。
本发明还提供了制备锂电池正极材料窑炉用高纯氧化铝砖的制备方法,包括以下步骤:
步骤一:将氧化铝细粉、氧化铝微粉、纳米级氧化铝粉以及硬质泡沫球加入高速搅拌机进行高速搅拌干混五分钟,实现各原料充分混合均匀;
步骤二:加入聚合氯化铝和水再次充分搅拌5分钟-8分钟,得到混合湿料;
步骤三:湿料放置24小时困料,困料结束后再高速粉碎均化一次备用;
步骤四:将混合料通过等静压压制成型,成型胚体经烘干后放入高温窑炉中加热至1550℃进行烧结,烧成后对其进行切磨。
优选地:步骤一中高速搅拌的搅拌转速为200rpm。
优选地:烧结温度为1450℃-1500℃。
本发明的优点如下:
材料由氧化铝细粉、氧化铝微粉与纳米级氧化铝粉复合而成,含有大量亚微米孔、少量纳米孔和微米孔,微小气孔赋予材料极低热导率,增加保温效果,较好实现节能减排,具体地:导热系数(平均350℃)为0.24w/(m·k),保温更好,节能降耗,Al2O3含量>99%,密度只有0.8g/cm3,制作成本更低,同样的体积重量也更轻,大大减少了炉体的承重,减少不必要的投入,更节约原料,烧成温度也更低更节约燃料,可以替代传统高纯氧化铝砖成为锂基正极材料烧成窑炉的工作衬。
具体实施方式
下面对本发明作进一步的说明,但本发明并不局限于这些内容。
实施例1
制备锂电池正极材料窑炉用高纯氧化铝砖,原料组成如下:氧化铝细粉40%、氧化铝微粉30%、纳米级氧化铝粉22%、结合剂8%。
实施例2
制备锂电池正极材料窑炉用高纯氧化铝砖,原料组成如下:氧化铝细粉30%、氧化铝微粉40%、纳米级氧化铝粉20%、结合剂10%。
实施例3
制备锂电池正极材料窑炉用高纯氧化铝砖,原料组成如下:氧化铝细粉50%、氧化铝微粉20%、纳米级氧化铝粉24%、结合剂6%。
其中,氧化铝细粉为氧化铝含量≥99%,细度D50≤0.3微米;氧化铝微粉为氧化铝含量≥99%,细度D50≤0.15微米;纳米级氧化铝粉为氧化铝含量≥99%;结合剂为聚合氯化铝,烧后释放氯气变为氧化铝。
本发明还提供了制备锂电池正极材料窑炉用高纯氧化铝砖的制备方法,其特征在于:包括以下步骤:
步骤一:将氧化铝细粉、氧化铝微粉、纳米级氧化铝粉以及硬质泡沫球加入高速搅拌机进行高速搅拌干混五分钟,实现各原料充分混合均匀;
步骤二:加入聚合氯化铝和水再次充分搅拌5分钟-8分钟,得到混合湿料;
步骤三:湿料放置24小时困料,困料结束后再高速粉碎均化一次备用;
步骤四:将混合料通过等静压压制成型,成型胚体经烘干后放入高温窑炉中加热至1550℃进行烧结,烧成后对其进行切磨。
本发明并不限于上述实施方式,在所属技术领域技术人员所具备的知识范围内,还可以在不脱离本发明宗旨的前提下作出各种变化。
Claims (10)
1.制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:原料组成如下:氧化铝细粉30%-50%、氧化铝微粉20%-40%、纳米级氧化铝粉20%-24%、结合剂6%-10%。
2.根据权利要求1所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:氧化铝细粉40%、氧化铝微粉30%、纳米级氧化铝粉22%、结合剂8%。
3.根据权利要求1所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:氧化铝细粉30%、氧化铝微粉40%、纳米级氧化铝粉20%、结合剂10%。
4.根据权利要求1所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:氧化铝细粉50%、氧化铝微粉20%、纳米级氧化铝粉24%、结合剂6%。
5.根据权利要求1-4任一所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:所述的氧化铝细粉为氧化铝含量≥99%,细度D50≤0.3微米。
6.根据权利要求1-4任一所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:所述的氧化铝微粉为氧化铝含量≥99%,细度D50≤0.15微米。
7.根据权利要求1-4任一所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:所述的纳米级氧化铝粉为氧化铝含量≥99%。
8.根据权利要求1-4任一所述的制备锂电池正极材料窑炉用高纯氧化铝砖,其特征在于:所述的结合剂为聚合氯化铝,烧后释放氯气变为氧化铝。
9.根据权利要求1-4任一所述的制备锂电池正极材料窑炉用高纯氧化铝砖的制备方法,其特征在于:包括以下步骤:
步骤一:将氧化铝细粉、氧化铝微粉、纳米级氧化铝粉以及硬质泡沫球加入高速搅拌机进行高速搅拌干混五分钟,实现各原料充分混合均匀;
步骤二:加入聚合氯化铝和水再次充分搅拌5分钟-8分钟,得到混合湿料;
步骤三:湿料放置24小时困料,困料结束后再高速粉碎均化一次备用;
步骤四:将混合料通过等静压压制成型,成型胚体经烘干后放入高温窑炉中加热至1550℃进行烧结,烧成后对其进行切磨。
10.根据权利要求9所述的制备锂电池正极材料窑炉用高纯氧化铝砖的制备方法,其特征在于:所述的步骤一中高速搅拌的搅拌转速为200rpm,步骤三中烧结温度为1450℃-1500℃。
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