从废旧电池正极材料低酸浸出渣中高压酸浸钴镍锰锂试验研究

针对废旧电池正极材料低酸浸出渣常压酸浸钴、镍、锰生产效率低、回收率不高等问题,研究了采用高压酸浸工艺浸出有价金属,考察了硫酸浓度、液固体积质量比、温度、反应时间、还原剂种类及加入量对钴、镍、锰、锂浸出率的影响。结果表明:在硫酸浓度4.0mol/L、液固体积质量比8.0mL/g、温度140℃、反应时间120min、还原剂五水硫代硫酸钠用量0.5g/8g渣条件下,钴、镍、锰、锂浸出率均在99%以上,钴、镍金属损失率不到0.2%,且浸出渣可循环利用,具有较好的工业应用价值。     

废锂电三元正极材料和铝镍钴废磁钢混合物酸浸技术研究

采用酸浸技术浸出废锂电三元正极材料和铝镍钴废磁钢混合物中的钴、镍、铜、锂和锰等有价元素,考察了两种废料质量比、反应温度、反应时间、硫酸浓度、液固比等对有价元素浸出率的影响。较优浸出工艺条件为:两废料质量比2.33∶1、硫酸浓度1.1mol/L、液固比6∶1、温度75℃、反应时间4h,在此条件下,钴、铜、镍、锂和锰浸出率均高于99.5%;在酸性条件下Fe~(3+)/Fe~(2+)构成氧化-还原闭路循环反应,促进了浸出反应的进行。该工艺资源利用率高、环境友好,可为综合回收废旧锂电池三元正极材料及铝镍钴废磁钢提供一条新的技术路线。     

低温焦硫酸钾焙烧选择性回收退役三元锂电池中的锂

通过低温焦硫酸钾焙烧与盐溶液浸出复合,实现了退役三元锂电池正极材料中锂的选择性回收。系统研究了焙烧温度、焦硫酸钾与正极材料质量比、焙烧时间对锂、钴、镍、锰回收效果的影响和作用机制。结果表明,在焙烧温度350 ℃、正极材料与焦硫酸钾质量比1︰2、焙烧时间60 min的条件下,再经草酸钾水溶液浸出后,锂的回收率达到97.21%,镍的浸出率为2.61%,钴的浸出率为3.1%,锰的浸出率为10.8%。同时,采用XRD、SEM和EDS表征焙烧前后材料的晶体结构、表面形貌以及元素组成变化,阐明了焦硫酸钾焙烧过程中锂、钴、镍、锰的相转化机制。与传统湿法、火法和生物冶金法相比,该回收技术低能耗、应用前景广阔。     

还原焙烧分步浸出工艺从废旧锂离子电池中回收有价金属

以废旧三元正极材料作为原料,提出了还原焙烧与氨基磺酸浸出相结合的工艺,提高锂的回收效率,同时实现组分的分步分离回收。在焙烧温度650 ℃、碳用量10%、还原焙烧时间90 min条件下,三元正极材料被还原为Li2CO3、NiO、MnO、Ni、Co的混合物,还原焙烧产物分步浸出,水浸回收锂,酸浸回收镍、钴、锰。采用氨基磺酸浸出水浸渣,最佳酸浸条件：氨基磺酸浓度0.75 mol/L、浸出温度60 ℃、固液比28 g/L、浸出时间40 min,此条件下镍、钴、锰的浸出率分别可以达到98.77%、98.71%、98.45%。     

废旧三元电池正极活性材料盐酸浸出液中钴锰共萃取分离镍锂

废旧三元电池正极活性材料盐酸浸出得到含金属钴、锰、镍、锂的浸液,比较选择了新型萃取体系Aliquat336+TBP/煤油共萃取钴锰并分离镍锂,提出了浸液中回收有价金属的新方法。研究了萃取剂种类、修饰剂、萃取剂浓度和相比等因素对钴锰共萃取分离镍和锂的影响。研究表明,当浸出液中氯离子浓度高于6.5M时,Aliquat336+TBP在煤油稀释剂中能够有效萃取钴锰分离镍锂,其它胺类萃取剂如Alamine 304、Alamine 308和Alamine336萃取效果明显低于Aliquat 336。优化条件下Aliquat 336+TBP体系对Co/Mn、Co/Ni和Co/Li分离系数分别为7、1 061、3 183;Mn/Ni和Mn/Li分离系数分别为156和468,表明钴锰能实现高效共萃,并与镍锂高效分离。TBP在体系中主要作为相修饰剂,但对钴锰的萃取起到了协同萃取的效果。采用Aliquat 336+TBP萃取体系共萃取钴锰,设计了废旧三元电池正极活性材料盐酸浸出液中回收钴镍锰锂的新方法。     

钴冰镍常压浸出工艺研究

以镍转炉渣还原硫化熔炼得到的钴冰镍为原料,在常压下于硫酸体系中进行浸出,考察了硫酸浓度、液固比、浸出时间及浸出温度对钴冰镍中有价成分浸出率的影响。结果表明,液固比和硫酸浓度对钴、镍、铁的浸出率影响较大。当硫酸浓度为1.6mol/L、液固比5、浸出时间2.5h、浸出温度85℃时,铁浸出率达到69%,镍、钴浸出率分别控制在1%和5%以内,取得了很好的选择性浸出效果。     

采用两矿研磨浸出法从含镍钴等废料中浸出有价金属试验研究

根据两矿法原理,研究了采用振动研磨—同步浸出工艺从含镍钴的废锂电池正极材料和铅镍钴磁钢废料中浸出镍、钴等有价元素,考察了振动频率、球料质量比、2种废料质量比、硫酸浓度、磨浸时间对金属浸出率的影响。结果表明:在振动频率24 Hz、球料质量比4∶1、锂电三元正极废料与铝镍钴磁钢废料质量比5.25∶1、硫酸浓度0.6 mol/L、液固体积质量比6∶1、磨浸时间2 h、温度75℃条件下,镍、钴等金属浸出率均高于99.3%。此工艺流程短,成本低,是综合处理含镍钴等废料的较好方法。     

焙烧水浸法从废旧三元正极材料中选择性提锂

针对废旧三元正极材料回收过程中工艺流程长、酸碱消耗高、锂直收率低、回收成本较高等问题,提出了助剂焙烧常温水浸联合新工艺,选择性提取废旧三元正极粉料中的锂,实现锂与其他金属(镍、钴、锰)的高效分离。新工艺以试剂A(无机酸)、试剂B(无机酸盐)为助剂,通过低温煅烧转化与常温水浸技术,提高废旧三元正极材料中锂的直收率,研究了煅烧温度、助剂与正极材料质量比、浸出液固比等条件对金属浸出率的影响。结果表明,在煅烧温度600℃、助剂A添加量为正极材料质量的50%、助剂B添加量为正极材料质量的5%、煅烧时间2h、水浸液固比3mL/g的条件下,Li浸出率达95%以上,浸出液中Li+浓度21g/L以上,其他金属(Ni、Co、Mn)含量均小于1mg/L。     

用常压酸浸 — 溶剂萃取法从硫锰废渣中回收锰钴镍试验研究

研究了采用常压酸浸—溶剂萃取法从硫锰废渣中回收锰、钴、镍。结果表明:10 g电解锰净化渣中加入1.5 g铁粉和1.32 g MnO_2,在硫酸浓度0.54 mol/L、液料体积质量比5 mL/g、温度90℃条件下浸出1.5 h,锰、钴、镍浸出率分别为89.20%、98.86%和98.16%;浸出过程中无硫化氢逸出。然后,用碳酸钙调pH除铁及加氟化锰除钙,再用P204萃取锰,P507萃取分离钴和镍。适宜条件下,锰、钴、镍回收率分别为87.44%、81.05%和83.17%,有价金属得到有效分离回收。     

从钴渣中浸出钴、锌、镉试验研究

研究了采用水洗—焙烧—还原酸浸工艺从A药剂钴渣中高效回收钴等有价金属,考察了焙烧温度、浸出时间、浸出温度、硫酸浓度、还原剂用量等对有价金属浸出率的影响。结果表明:钴渣在液固体积质量比5/1、常温下搅拌水洗1 h,然后在500℃下焙烧2 h,最后在80℃下用质量浓度80 g/L硫酸、10 g/L亚硫酸钠浸出1 h,钴浸出率在90%以上,锌浸出率在96%以上,镉浸出率大于99%,浸出液中的有价金属可高效回收。     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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