CN115332657A - A two-step acid leaching process for lithium ion of power battery - Google Patents
A two-step acid leaching process for lithium ion of power battery Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及废旧动力电池回收处理技术领域，尤其涉及一种动力电池锂离子二步酸浸出工艺。The invention relates to the technical field of recovery and treatment of waste power batteries, in particular to a two-step acid leaching process for lithium ions of power batteries.
背景技术Background technique
锂离子电池以其高能量密度、循环寿命长、环境友好等优势受到了市场和消费者的青睐，广泛应用于笔记本电脑、相机、手机等便携式电子设备。随着新能源汽车的大发展，动力锂电池作为新能源汽车的心脏，也随之迅猛发展。随之而来的是更多的退役锂离子电池的出现，这些退役锂离子电池含有大量的锂等有价金属，这些有机金属含有较大的回收利用价值，如果不回收，又会对环境造成严重污染。因此，对动力锂电池进行有效回收再利用显得尤为重要，是同时实现经济价值、社会价值和生态价值之举。Lithium-ion batteries are favored by the market and consumers for their high energy density, long cycle life, and environmental friendliness, and are widely used in portable electronic devices such as laptops, cameras, and mobile phones. With the great development of new energy vehicles, power lithium batteries, as the heart of new energy vehicles, are also developing rapidly. What followed was the emergence of more decommissioned lithium-ion batteries. These decommissioned lithium-ion batteries contain a large amount of valuable metals such as lithium. These organic metals contain a large recycling value. If they are not recycled, they will cause environmental damage. heavily polluted. Therefore, it is particularly important to effectively recycle and reuse power lithium batteries, which is a move to simultaneously realize economic value, social value and ecological value.
在废旧动力电池回收过程中，动力电池锂离子二步酸浸出工艺是必不可少的工艺之一。然而，现有的动力电池锂离子浸出工艺往往伴随着二次污染、浸出液要求高、产品纯度低、生产成本高昂、工艺流程复杂、工业放大困难等环境和技术问题，且其还存在消耗酸碱量极大，浸出效率低，资源消耗大的缺陷。In the recycling process of waste power batteries, the lithium ion two-step acid leaching process for power batteries is one of the essential processes. However, the existing lithium-ion leaching process for power batteries is often accompanied by environmental and technical problems such as secondary pollution, high requirements for leachate, low product purity, high production costs, complex process flow, and difficulty in industrial scale-up, and it also consumes acid and alkali. The amount is huge, the leaching efficiency is low, and the defects of resource consumption are large.
为了解决上述问题，中国发明专利CN105206889A公布的“一种废旧镍钴锰酸锂三元电池正极材料的处理方法”利用酸浸出法回收镍钴锰酸锂废旧电池中的有价金属，先用沉淀法除杂，然后加碱共沉淀镍钴锰制备前驱体，该方法虽克服了分别沉淀回收镍盐、钴盐、锰盐产品纯度不高的问题，操作也较简单，但对浸出液除杂深度要求高且浸出后液离子浓度较低，浸出酸的利用率也普遍降低。In order to solve the above problems, the Chinese invention patent CN105206889A published “A Treatment Method for Anode Material of Waste Nickel Cobalt Lithium Manganese Oxide Ternary Battery” utilizes the acid leaching method to reclaim the valuable metals in nickel cobalt lithium manganese oxide waste battery, first use precipitation method to remove impurities, and then add alkali to co-precipitate nickel-cobalt-manganese to prepare the precursor. Although this method overcomes the problem of low purity of nickel salt, cobalt salt, and manganese salt by precipitation and recovery separately, the operation is also relatively simple, but the depth of impurity removal in the leachate is limited. The requirements are high and the concentration of liquid ions after leaching is low, and the utilization rate of leaching acid is also generally reduced.
因此，开发一种锂离子浸出效率和浸出率高，消耗酸量小，环保性足，适用性强，工艺流程简单，易于控制和放大的动力电池锂离子二步酸浸出工艺符合市场需求，具有广泛的市场价值和应用前景，对促进废旧动力电池的高效安全回收再利用具有非常重要的意义。Therefore, the development of a lithium-ion two-step acid leaching process for power batteries with high efficiency and high leaching rate, low acid consumption, sufficient environmental protection, strong applicability, simple process flow, and easy control and amplification meets market demand and has Extensive market value and application prospects are of great significance to promote the efficient and safe recycling of waste power batteries.
发明内容Contents of the invention
本发明目的是为了克服现有技术的不足而提供一种锂离子浸出效率和浸出率高，消耗酸量小，环保性足，适用性强，工艺流程简单，易于控制和放大的动力电池锂离子二步酸浸出工艺。The purpose of the present invention is to overcome the deficiencies of the prior art and provide a lithium ion power battery with high leaching efficiency and leaching rate, low acid consumption, sufficient environmental protection, strong applicability, simple process flow, and easy control and amplification. Two-step acid leaching process.
为达到上述目的，本发明采用的技术方案是：一种动力电池锂离子二步酸浸出工艺，其特征在于，包括如下步骤：In order to achieve the above object, the technical solution adopted in the present invention is: a two-step acid leaching process for lithium ions of power batteries, which is characterized in that it comprises the following steps:
步骤S101、预处理：将废旧动力电池依次经过放电、拆解、分选，得到的正极材料粗碎、干燥处理；Step S101, pretreatment: Discharging, dismantling, and sorting the waste power batteries in sequence, and coarsely crushing and drying the obtained positive electrode material;
步骤S102、一步酸浸：采用浸泡液A对经过步骤S101处理的正极材料进行浸出，浸出过程中伴有双频超声处理和稳恒磁场处理；后过滤，得到一步浸出液和浸出渣；Step S102, one-step acid leaching: leaching the positive electrode material treated in step S101 with soaking solution A, accompanied by dual-frequency ultrasonic treatment and constant magnetic field treatment during the leaching process; and then filtering to obtain one-step leaching solution and leaching residue;
步骤S103、二步酸浸：将经过步骤S102制成的浸出渣在100-120℃下干燥至恒重，然后再采用浸泡液B对其进行二步浸出，浸出过程中伴有微波处理和超声处理；后过滤，取滤液得到二步浸出液。Step S103, two-step acid leaching: dry the leaching residue prepared in step S102 at 100-120°C to constant weight, and then use soaking solution B to carry out two-step leaching, accompanied by microwave treatment and ultrasound during the leaching process Processing; after filtration, take the filtrate to obtain the two-step leachate.
优选的，步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 3-5份、水溶性壳聚糖0.1-0.3份、木质素磺酸钠0.5-1.0份、水25-35份。Preferably, the soaking solution A described in step S102 is made from the following components by weight: 3-5 parts of H 2 SO 4 , 0.1-0.3 parts of water-soluble chitosan, 0.5-0 parts of sodium lignosulfonate 1.0 parts, 25-35 parts of water.
优选的，步骤S102中所述浸泡液A、正极材料的液固比为(8-12):1。Preferably, the liquid-solid ratio of the soaking solution A and the positive electrode material in step S102 is (8-12):1.
优选的，步骤S102中所述浸出的温度为60℃～90℃，时间为 1.5～3.5h。Preferably, the temperature of the leaching in step S102 is 60°C-90°C, and the time is 1.5-3.5h.
优选的，步骤S102中所述双频超声处理具体为26-37KHz下超声处理8-12min，73-92KHz下超声处理13-18min。Preferably, the dual-frequency ultrasonic treatment in step S102 is specifically ultrasonic treatment at 26-37KHz for 8-12min, and ultrasonic treatment at 73-92KHz for 13-18min.
优选的，步骤S102中所述稳恒磁场处理的磁场强度为2100-3300Gs，磁场处理的时间为25-30min。Preferably, the magnetic field intensity of the steady magnetic field treatment in step S102 is 2100-3300Gs, and the time of the magnetic field treatment is 25-30min.
优选的，步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸3-5份、还原剂0.2-0.4份、烟酰胺腺嘌呤双核苷酸0.1-0.3份、N-羟乙基乙二胺三乙酸0.8-1.2份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.3-0.5份、水35-45份。Preferably, the soaking solution B in step S103 is made of the following components in parts by weight: 3-5 parts of mixed acid, 0.2-0.4 parts of reducing agent, 0.1-0.3 parts of nicotinamide adenine dinucleotide , 0.8-1.2 parts of N-hydroxyethylethylenediaminetriacetic acid, 0.3-0.5 parts of N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate sodium, 35-45 parts of water.
优选的，步骤S103中所述混合酸为硫酸、硝酸、柠檬酸、甲酸、乙酸中的至少一种。Preferably, the mixed acid in step S103 is at least one of sulfuric acid, nitric acid, citric acid, formic acid and acetic acid.
优选的，步骤S103中所述还原剂为亚硫酸钠、亚硫酸、硫代硫酸钠、过氧化氢中的至少一种。Preferably, the reducing agent in step S103 is at least one of sodium sulfite, sulfurous acid, sodium thiosulfate, and hydrogen peroxide.
优选的，步骤S103中所述浸出的温度为70℃～100℃，时间为 2～5h。Preferably, the temperature of the leaching in step S103 is 70°C-100°C, and the time is 2-5h.
优选的，步骤S103中所述微波处理的微波频率为110-230W，处理时间为10-15min。Preferably, the microwave frequency of the microwave treatment in step S103 is 110-230W, and the treatment time is 10-15min.
优选的，步骤S103中所述超声处理为50-70KHZ的条件下超声30-50分钟。Preferably, the ultrasonic treatment in step S103 is performed under the condition of 50-70KHZ for 30-50 minutes.
具体实施方式Detailed ways
下面将结合对本发明优选实施方案进行详细说明。The preferred embodiments of the present invention will be described in detail below.
一种动力电池锂离子二步酸浸出工艺，其特征在于，包括如下步骤：A two-step acid leaching process for power battery lithium ions, characterized in that it comprises the following steps:
步骤S101、预处理：将废旧动力电池依次经过放电、拆解、分选，得到的正极材料粗碎、干燥处理；Step S101, pretreatment: Discharging, dismantling, and sorting the waste power batteries in sequence, and coarsely crushing and drying the obtained positive electrode material;
步骤S102、一步酸浸：采用浸泡液A对经过步骤S101处理的正极材料进行浸出，浸出过程中伴有双频超声处理和稳恒磁场处理；后过滤，得到一步浸出液和浸出渣；Step S102, one-step acid leaching: leaching the positive electrode material treated in step S101 with soaking solution A, accompanied by dual-frequency ultrasonic treatment and constant magnetic field treatment during the leaching process; and then filtering to obtain one-step leaching solution and leaching residue;
步骤S103、二步酸浸：将经过步骤S102制成的浸出渣在100-120℃下干燥至恒重，然后再采用浸泡液B对其进行二步浸出，浸出过程中伴有微波处理和超声处理；后过滤，取滤液得到二步浸出液。Step S103, two-step acid leaching: dry the leaching residue prepared in step S102 at 100-120°C to constant weight, and then use soaking solution B to carry out two-step leaching, accompanied by microwave treatment and ultrasound during the leaching process Processing; after filtration, take the filtrate to obtain the two-step leachate.
优选的，步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 3-5份、水溶性壳聚糖0.1-0.3份、木质素磺酸钠0.5-1.0份、水25-35份。Preferably, the soaking solution A described in step S102 is made from the following components by weight: 3-5 parts of H 2 SO 4 , 0.1-0.3 parts of water-soluble chitosan, 0.5-0 parts of sodium lignosulfonate 1.0 parts, 25-35 parts of water.
优选的，步骤S102中所述浸泡液A、正极材料的液固比为(3-5):1。Preferably, the liquid-solid ratio of the soaking solution A and the positive electrode material in step S102 is (3-5):1.
优选的，步骤S102中所述浸出的温度为60℃～90℃，时间为 1.5～3.5h。Preferably, the temperature of the leaching in step S102 is 60°C-90°C, and the time is 1.5-3.5h.
优选的，步骤S102中所述双频超声处理具体为26-37KHz下超声处理8-12min，73-92KHz下超声处理13-18min。Preferably, the dual-frequency ultrasonic treatment in step S102 is specifically ultrasonic treatment at 26-37KHz for 8-12min, and ultrasonic treatment at 73-92KHz for 13-18min.
优选的，步骤S102中所述稳恒磁场处理的磁场强度为2100-3300Gs，磁场处理的时间为25-30min。Preferably, the magnetic field intensity of the steady magnetic field treatment in step S102 is 2100-3300Gs, and the time of the magnetic field treatment is 25-30min.
优选的，步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸3-5份、还原剂0.2-0.4份、烟酰胺腺嘌呤双核苷酸0.1-0.3份、N-羟乙基乙二胺三乙酸0.8-1.2份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.3-0.5份、水35-45份。Preferably, the soaking solution B in step S103 is made of the following components in parts by weight: 3-5 parts of mixed acid, 0.2-0.4 parts of reducing agent, 0.1-0.3 parts of nicotinamide adenine dinucleotide , 0.8-1.2 parts of N-hydroxyethylethylenediaminetriacetic acid, 0.3-0.5 parts of N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate sodium, 35-45 parts of water.
优选的，步骤S103中所述混合酸为硫酸、硝酸、柠檬酸、甲酸、乙酸中的至少一种。Preferably, the mixed acid in step S103 is at least one of sulfuric acid, nitric acid, citric acid, formic acid and acetic acid.
优选的，步骤S103中所述还原剂为亚硫酸钠、亚硫酸、硫代硫酸钠、过氧化氢中的至少一种。Preferably, the reducing agent in step S103 is at least one of sodium sulfite, sulfurous acid, sodium thiosulfate, and hydrogen peroxide.
优选的，步骤S103中所述浸出的温度为70℃～100℃，时间为 2～5h。Preferably, the temperature of the leaching in step S103 is 70°C-100°C, and the time is 2-5h.
优选的，步骤S103中所述微波处理的微波频率为110-230W，处理时间为10-15min。Preferably, the microwave frequency of the microwave treatment in step S103 is 110-230W, and the treatment time is 10-15min.
优选的，步骤S103中所述超声处理为50-70KHZ的条件下超声30-50分钟。Preferably, the ultrasonic treatment in step S103 is performed under the condition of 50-70KHZ for 30-50 minutes.
优选的，步骤S103中所述浸泡液B、正极材料的液固比为(5-8):1。Preferably, the liquid-solid ratio of the soaking solution B and the positive electrode material in step S103 is (5-8):1.
由于上述技术方案运用，本发明与现有技术相比具有下列优点：本发明提供的一种动力电池锂离子二步酸浸出工艺，通过浸泡剂组分配方的合理选取，与各步骤相互配合共同作用，使得该方法锂离子浸出效率和浸出率高，消耗酸量小，环保性足，适用性强，工艺流程简单，易于控制和放大。步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 3-5份、水溶性壳聚糖0.1-0.3份、木质素磺酸钠0.5-1.0份、水25-35份。步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸3-5份、还原剂0.2-0.4份、烟酰胺腺嘌呤双核苷酸0.1-0.3份、N-羟乙基乙二胺三乙酸0.8-1.2份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.3-0.5份、水35-45份。其中的水溶性壳聚糖、木质素磺酸钠、烟酰胺腺嘌呤双核苷酸、N-羟乙基乙二胺三乙酸和N,N-二(2-羟乙基)-2-氨基乙磺酸钠是首次应用于浸泡液，它们与其它组分协同作用，能有效改善锂离子的溶出，进而改善浸出效率和浸出率。所述水溶性壳聚糖购于河南中辰生物科技有限公司，为食品级产品。Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: a two-step acid leaching process for power battery lithium ions provided by the present invention, through the reasonable selection of soaking agent component formulations, cooperates with each step Therefore, the method has high lithium ion leaching efficiency and leaching rate, low acid consumption, sufficient environmental protection, strong applicability, simple process flow, and easy control and amplification. The soaking liquid A described in step S102 is made of the following components by weight: 3-5 parts of H2SO4 , 0.1-0.3 parts of water - soluble chitosan, 0.5-1.0 parts of sodium lignosulfonate, 25-35 parts of water. The soaking solution B described in step S103 is made of the following components in parts by weight: 3-5 parts of mixed acid, 0.2-0.4 parts of reducing agent, 0.1-0.3 parts of nicotinamide adenine dinucleotide, N- 0.8-1.2 parts of hydroxyethylethylenediamine triacetic acid, 0.3-0.5 parts of sodium N,N-di(2-hydroxyethyl)-2-aminoethanesulfonate, and 35-45 parts of water. Among them, water-soluble chitosan, sodium lignosulfonate, nicotinamide adenine dinucleotide, N-hydroxyethylethylenediaminetriacetic acid and N,N-di(2-hydroxyethyl)-2-aminoethyl Sodium sulfonate is used in the soaking solution for the first time. They work synergistically with other components to effectively improve the dissolution of lithium ions, thereby improving the leaching efficiency and leaching rate. The water-soluble chitosan was purchased from Henan Zhongchen Biotechnology Co., Ltd. and is a food-grade product.
下面将结合具体实施例对本发明进行进一步描述，但本发明的保护范围并不仅限于此：The present invention will be further described below in conjunction with specific embodiment, but protection scope of the present invention is not limited thereto:
实施例1Example 1
步骤S101、预处理：将废旧动力电池依次经过放电、拆解、分选，得到的正极材料粗碎、干燥处理；Step S101, pretreatment: Discharging, dismantling, and sorting the waste power batteries in sequence, and coarsely crushing and drying the obtained positive electrode material;
步骤S102、一步酸浸：采用浸泡液A对经过步骤S101处理的正极材料进行浸出，浸出过程中伴有双频超声处理和稳恒磁场处理；后过滤，得到一步浸出液和浸出渣；Step S102, one-step acid leaching: leaching the positive electrode material treated in step S101 with soaking solution A, accompanied by dual-frequency ultrasonic treatment and constant magnetic field treatment during the leaching process; and then filtering to obtain one-step leaching solution and leaching residue;
步骤S103、二步酸浸：将经过步骤S102制成的浸出渣在100℃下干燥至恒重，然后再采用浸泡液B对其进行二步浸出，浸出过程中伴有微波处理和超声处理；后过滤，取滤液得到二步浸出液。Step S103, two-step acid leaching: drying the leaching residue prepared in step S102 to a constant weight at 100° C., and then performing two-step leaching with soaking solution B, accompanied by microwave treatment and ultrasonic treatment during the leaching process; After filtering, take the filtrate to obtain the two-step leaching solution.
步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 3份、水溶性壳聚糖0.1份、木质素磺酸钠0.5份、水25份；步骤S102中所述浸泡液A、正极材料的液固比为3:1；步骤S102中所述浸出的温度为60℃，时间为 1.5h；步骤S102中所述双频超声处理具体为26KHz下超声处理8min，73KHz下超声处理13min；步骤S102中所述稳恒磁场处理的磁场强度为2100Gs，磁场处理的时间为25min。The soaking solution A described in step S102 is made from the following components by weight: 3 parts of H2SO4 , 0.1 part of water-soluble chitosan, 0.5 part of sodium lignosulfonate, and 25 parts of water; step S102 The liquid-solid ratio of the soaking solution A and the positive electrode material is 3:1; the temperature of the leaching in step S102 is 60°C, and the time is 1.5h; the dual-frequency ultrasonic treatment described in step S102 is specifically ultrasonic treatment at 26KHz 8 minutes, ultrasonic treatment at 73KHz for 13 minutes; the magnetic field strength of the steady magnetic field treatment in step S102 is 2100Gs, and the time of the magnetic field treatment is 25 minutes.
步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸3份、还原剂0.2份、烟酰胺腺嘌呤双核苷酸0.1份、N-羟乙基乙二胺三乙酸0.8份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.3份、水35份；骤S103中所述混合酸为硫酸；步骤S103中所述还原剂为亚硫酸钠。The soaking solution B described in step S103 is made from the following components in parts by weight: 3 parts of mixed acid, 0.2 part of reducing agent, 0.1 part of nicotinamide adenine dinucleotide, N-hydroxyethylethylenediamine 0.8 part of triacetic acid, 0.3 part of N,N-di(2-hydroxyethyl)-2-aminoethanesulfonate sodium, 35 parts of water; the mixed acid described in step S103 is sulfuric acid; the reducing agent described in step S103 is Sulfite.
步骤S103中所述浸出的温度为70℃，时间为 2h；步骤S103中所述微波处理的微波频率为110W，处理时间为10min；步骤S103中所述超声处理为50KHZ的条件下超声30分钟；步骤S103中所述浸泡液B、正极材料的液固比为5:1。The leaching temperature in step S103 is 70° C., and the time is 2 hours; the microwave frequency of the microwave treatment in step S103 is 110 W, and the treatment time is 10 minutes; the ultrasonic treatment in step S103 is 50 KHZ for 30 minutes; The liquid-solid ratio of the soaking solution B and the positive electrode material in step S103 is 5:1.
实施例2Example 2
一种动力电池锂离子二步酸浸出工艺，其与实施例1基本相同，不同的是，步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 3.5份、水溶性壳聚糖0.15份、木质素磺酸钠0.6份、水27份。步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸3.5份、还原剂0.25份、烟酰胺腺嘌呤双核苷酸0.15份、N-羟乙基乙二胺三乙酸0.9份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.35份、水38份。A two-step acid leaching process for lithium ions of a power battery, which is basically the same as in Example 1, except that the soaking solution A described in step S102 is made of the following components in parts by weight: H 2 SO 4 3.5 0.15 parts of water-soluble chitosan, 0.6 parts of sodium lignosulfonate, and 27 parts of water. The soaking solution B described in step S103 is made from the following components in parts by weight: 3.5 parts of mixed acid, 0.25 part of reducing agent, 0.15 part of nicotinamide adenine dinucleotide, N-hydroxyethylethylenediamine 0.9 parts of triacetic acid, 0.35 parts of sodium N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and 38 parts of water.
实施例3Example 3
一种动力电池锂离子二步酸浸出工艺，其与实施例1基本相同，不同的是，步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 4份、水溶性壳聚糖0.2份、木质素磺酸钠0.8份、水30份。步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸4份、还原剂0.3份、烟酰胺腺嘌呤双核苷酸0.2份、N-羟乙基乙二胺三乙酸1份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.4份、水40份。A two-step acid leaching process for lithium ions of a power battery, which is basically the same as in Example 1, except that the soaking solution A described in step S102 is made of the following components in parts by weight: H 2 SO 4 4 parts, 0.2 parts of water-soluble chitosan, 0.8 parts of sodium lignosulfonate, and 30 parts of water. The soaking solution B described in step S103 is made from the following components in parts by weight: 4 parts of mixed acid, 0.3 part of reducing agent, 0.2 part of nicotinamide adenine dinucleotide, N-hydroxyethylethylenediamine 1 part of triacetic acid, 0.4 part of sodium N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and 40 parts of water.
实施例4Example 4
一种动力电池锂离子二步酸浸出工艺，其与实施例1基本相同，不同的是，步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 4.5份、水溶性壳聚糖0.25份、木质素磺酸钠0.9份、水33份。步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸4.5份、还原剂0.35份、烟酰胺腺嘌呤双核苷酸0.25份、N-羟乙基乙二胺三乙酸1.1份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.45份、水43份。A two-step acid leaching process for lithium ions of a power battery, which is basically the same as in Example 1, except that the soaking solution A described in step S102 is made of the following components in parts by weight: H 2 SO 4 4.5 0.25 parts of water-soluble chitosan, 0.9 parts of sodium lignosulfonate, and 33 parts of water. The soaking solution B described in step S103 is made of the following components in parts by weight: 4.5 parts of mixed acid, 0.35 parts of reducing agent, 0.25 parts of nicotinamide adenine dinucleotide, N-hydroxyethylethylenediamine 1.1 parts of triacetic acid, 0.45 parts of sodium N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and 43 parts of water.
实施例5Example 5
一种动力电池锂离子二步酸浸出工艺，其与实施例1基本相同，不同的是，步骤S102中所述浸泡液A是由如下按重量份的各组分制成：H2SO4 5份、水溶性壳聚糖0.3份、木质素磺酸钠1.0份、水35份。步骤S103中所述浸泡液B是由如下按重量份计的各组分制成：混合酸5份、还原剂0.4份、烟酰胺腺嘌呤双核苷酸0.3份、N-羟乙基乙二胺三乙酸1.2份、N,N-二(2-羟乙基)-2-氨基乙磺酸钠0.5份、水45份。A two-step acid leaching process for lithium ions of a power battery, which is basically the same as in Example 1, except that the soaking solution A described in step S102 is made of the following components in parts by weight: H 2 SO 4 5 part, 0.3 part of water-soluble chitosan, 1.0 part of sodium lignosulfonate, and 35 parts of water. The soaking solution B described in step S103 is made from the following components in parts by weight: 5 parts of mixed acid, 0.4 part of reducing agent, 0.3 part of nicotinamide adenine dinucleotide, N-hydroxyethylethylenediamine 1.2 parts of triacetic acid, 0.5 parts of sodium N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and 45 parts of water.
对比例comparative example
一种动力电池锂离子二步酸浸出工艺，其与实施例1基本相同，不同的是，没有添加烟酰胺腺嘌呤双核苷酸和木质素磺酸钠。A lithium ion two-step acid leaching process for a power battery, which is basically the same as in Example 1, except that nicotinamide adenine dinucleotide and sodium lignosulfonate are not added.
为了进一步说明各例工艺的有益技术效果，对各例中锂离子浸出率进行统计，结果见表1。In order to further illustrate the beneficial technical effects of each example process, the lithium ion leaching rate in each example was counted, and the results are shown in Table 1.
表1Table 1
从上表可以看出，本发明实施例公开的动力电池锂离子二步酸浸出工艺锂离子浸出率更高，这是各步骤和各浸泡液配方共同作用的结果。It can be seen from the above table that the two-step acid leaching process for power battery lithium ions disclosed in the embodiment of the present invention has a higher lithium ion leaching rate, which is the result of the joint action of each step and each soaking solution formula.
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围，凡根据依据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present invention. Equivalent changes or modifications made in the spirit of the invention shall fall within the protection scope of the present invention.
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