CN116328933A - 锂电池黑粉均匀化方法 - Google Patents
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Abstract
本发明公开了一种锂电池黑粉均匀化方法,包括以下步骤:将锂电池黑粉投入一温度可控的反应槽内进行清洗;将清洗所得的固体进行一温度可控的过滤;将所得的滤饼投入浮选槽内,用水将锂电池黑粉调配成浮选矿浆,向浮选矿浆中加入碳捕集剂和起泡剂,得到碳产品和金属盐沉矿,若金属盐沉矿中碳成分>0.5wt%则继续投入浮选槽浮选,直至碳成分<0.5wt%;将碳成分<0.5wt%的金属盐沉矿进行磁选,以去除其中所含的铁成分;将所得的产物进行涡电流分选,以去除其中所含的铝成分;所得的固体即为含锂、锰、钴、镍成分的金属盐精矿,可进行后续有价金属的提取及化学精炼处理。
Description
技术领域
本发明是有关于一种锂电池黑粉均匀化方法,针对废锂电池有价金属的提取及化学精炼处理的前处理纯化的方法。
背景技术
锂电池的组成大致可分为电极(含正极与负极)、隔离膜、电解液及罐体等,废锂电池的电极材料一旦进入到环境中,电池正极的金属离子、负极的碳粉尘、电解质中的强碱和重金属离子可能造成严重的环境污染,故需将废锂电池予以回收处理,而废锂电池的处理技术可分为物理前处理过程、有价金属的提取过程及化学精炼处理过程,其中物理前处理技术主要透过简易的放电处理后,利用物理破碎及分选过程,将废电池处理成含金属及混合塑料的混合粉末(俗称黑粉),再进行后续有价金属的提取以及化学精炼处理;然而,现今废锂电池的前处理方法,主要是利用高温处理的方法从废锂电池中提取金属或金属化合物,该高温处理方法反应速度快、耗时短,但成本较高、黑粉纯度也较低,且高温能耗高,电解液和黏结剂在高温下会产生大量的有毒废气,会造成环境二次污染。
发明内容
本发明的主要目的,是在于提供一种锂电池黑粉均匀化方法,可有效解决废锂电池中黑粉纯度不佳的缺点。
本发明的锂电池黑粉均匀化方法,所述方法包括以下步骤:
(1)将锂电池黑粉投入一温度可控的反应槽内进行清洗,清洗温度为50℃~150℃,清洗时间为0.5~2小时,清洗液的成分为苯、N-甲基吡咯烷酮、丙二醇单甲醚、丙二醇单甲醚醋酸酯或含卤素的烷烃类中的一种或一种以上;
(2)将步骤(1)清洗所得的固体,进行一温度可控的过滤,过滤温度50℃~150℃,过滤时间为0.5~2小时;
(3)将步骤(2)所得的滤饼投入浮选槽内,用水将黑粉调配成浓度5~35wt%的浮选矿浆,向浮选矿浆中加入碳捕集剂和起泡剂,碳捕集剂和起泡剂的添加量为投入黑粉重量的0.1~10%,得到碳产品和金属盐沉矿,若金属盐沉矿中碳成分>0.5wt%则继续投入浮选槽浮选,直至碳成分<0.5wt%;
(4)将步骤(3)碳成分<0.5wt%的金属盐沉矿进行磁选,磁力强度为5000~30000高斯,以去除其中所含的铁成分;
(5)将步骤(4)磁选后所得的产物进行涡电流分选,以去除其中所含的铝成分;
(6)步骤(5)所得的固体即为含锂、锰、钴、镍成分的金属盐精矿,用于后续有价金属的提取及化学精炼处理。
本发明的锂电池黑粉均匀化方法,其优点是在于:针对废锂电池黑粉前处理过程开发程序,可降低黑粉中塑料、金属等杂质成分,提高黑粉纯度,以利后续有价金属的提取及化学精炼处理,并可避免对环境造成二次污染。
附图说明
图1所示为本发明锂电池黑粉的成份表。
图2所示为本发明锂电池黑粉均匀化处理的流程图。
具体实施方式
有关本发明为达上述的使用目的与功效所采用的技术手段,现举出较佳可行的实施例,并配合附图所示,详述如下:
本发明的锂电池黑粉均匀化方法,其黑粉的成分如图1所示,而锂电池黑粉均匀化方法的处理流程如图2所示,其处理步骤如下:
(1)将锂电池黑粉投入一温度可控的反应槽内进行清洗,清洗温度为50℃~150℃,清洗时间为0.5~2小时,清洗液的成分为苯、N-甲基吡咯烷酮(英文名称NMP)、丙二醇单甲醚(英文名称PGME)、丙二醇单甲醚醋酸酯(英文名称PGMEA)或含卤素的烷烃类(例如二氯甲烷)中的一种或一种以上;
(2)将步骤(1)清洗所得的固体,进行一温度可控的过滤,过滤温度为50℃~150℃,过滤时间为0.5~2小时;
(3)将步骤(2)所得的滤饼投入浮选槽内,用水将黑粉调配成浓度5~35wt%的浮选矿浆,向浮选矿浆中加入碳捕集剂(如煤油或柴油)和起泡剂(如松节油),碳捕集剂和起泡剂的添加量为投入黑粉重量的0.1~10%,得到碳产品和金属盐沉矿,若金属盐沉矿中碳成分>0.5wt%则继续投入浮选槽浮选,直至碳成分<0.5wt%;
(4)将步骤(3)碳成分<0.5wt%的金属盐沉矿进行磁选,磁力强度为5000~30000高斯,以去除其中所含的铁成分;
(5)将步骤(4)磁选所得的产物进行涡电流分选,以去除其中所含的铝成分;
(6)步骤(5)所得的固体即为含锂、锰、钴、镍成分的金属盐精矿,可进行后续有价金属的提取及化学精炼处理。
本发明的实施例1:
(1)将锂电池黑粉投入一温度可控的反应槽内进行清洗,清洗温度为90℃,清洗时间为1小时,清洗液的成分为苯;
(2)将步骤(1)清洗所得的固体,进行一温度可控的过滤,过滤温度为90℃,过滤时间为1小时;
(3)将步骤(2)所得的滤饼投入浮选槽内,用水将黑粉调配成浓度20wt%的浮选矿浆,向浮选矿浆中加入0.5wt%煤油和0.5wt%松节油,得到碳产品和金属盐沉矿,若金属盐沉矿中碳成分>0.5wt%则继续投入浮选槽浮选,经由增加配比使其中浮选矿浆浓度维持在20wt%,碳捕集剂浓度维持在0.5wt%,起泡剂浓度维持在0.5wt%,直至碳成分<0.5wt%;
(4)将步骤(3)浮选所得碳成分<0.5wt%的金属盐沉矿进行磁选,磁力强度为30000高斯,以去除其中所含的铁成分;
(5)将步骤(4)磁选所得的产物进行涡电流分选,以去除其中所含的铝成分;
(6)所得的固体即为含锂、锰、钴、镍成分的金属盐精矿,可进行后续有价金属的提取及化学精炼处理。
综上所述,本发明确实已达到所预期的使用目的与功效,且相较于已知技术更为理想、实用,只是,上述实施例仅是针对本发明的较佳实施例进行具体说明而已,该实施例并非用以限定本发明的申请专利范围,其它未脱离本发明所揭示的技术手段下所完成的均等变化与修饰,均应包含于本发明所涵盖的申请专利范围中。
Claims (1)
1.一种锂电池黑粉均匀化方法,其特征在于,所述方法包括以下步骤:
(1)将锂电池黑粉投入一温度可控的反应槽内进行清洗,清洗温度为50℃~150℃,清洗时间为0.5~2小时,清洗液的成分为苯、N-甲基吡咯烷酮、丙二醇单甲醚、丙二醇单甲醚醋酸酯或含卤素的烷烃类中的一种或一种以上;
(2)将步骤(1)清洗所得的固体,进行一温度可控的过滤,过滤温度50℃~150℃,过滤时间为0.5~2小时;
(3)将步骤(2)所得的滤饼投入浮选槽内,用水将黑粉调配成浓度5~35wt%的浮选矿浆,向浮选矿浆中加入碳捕集剂和起泡剂,碳捕集剂和起泡剂的添加量为投入黑粉重量的0.1~10%,得到碳产品和金属盐沉矿,若金属盐沉矿中碳成分>0.5wt%则继续投入浮选槽浮选,直至碳成分<0.5wt%;
(4)将步骤(3)浮选所得碳成分<0.5wt%的金属盐沉矿进行磁选,磁力强度为5000~30000高斯,以去除其中所含的铁成分;
(5)将步骤(4)磁选后所得的产物进行涡电流分选,以去除其中所含的铝成分;
(6)步骤(5)所得的固体即为含锂、锰、钴、镍成分的金属盐精矿,用于后续有价金属的提取及化学精炼处理。
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