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。     

从含锰钴镍浸出液中萃取回收锰

采用P204作为萃取剂,磺化煤油为稀释剂,从锰钴镍溶液中二级萃取分离锰,有机相反萃取富集锰,考察各因素对锰萃取率及分离系数的影响并确定最优条件。结果表明,在室温下,一级萃取相比O/A=2.5,P204含量30%,pH=3.5,皂化率30%,锰萃取率为62.39%;二级萃取在P204含量30%,皂化率30%,O/A=2,锰的总萃取率达98.06%,锰与钴、镍分离系数分别为90.11、92.33。萃取液经硫酸反萃洗钴镍,按相比O/A=10,酸度70 g/L,可洗去85%以上的钴和镍。洗钴镍后液经硫酸反萃锰,按相比O/A=4,酸度110 g/L,可反萃98.27%的锰,反萃液钴、镍的浓度小于0.5 g/L。     

复杂铜钴矿浸出溶液处理试验

以复杂铜钴矿浸出溶液为原料,采用M5774萃取铜,硫酸反萃,铜的萃取率和反萃率均大于99%,萃余液用SO_2/空气混合气氧化中和除铁、锰,除铁后液铁和铝均小于0.005g/L,锰没有完全除掉,采用活性氧化镁沉淀镍和钴,在较优条件下,镍、钴沉淀率分别为97.73%和94.33%,用活性氧化钙沉淀锰和镁。     

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。     

用Cyanex~301二元萃取体系从酸性硫酸盐溶液中回收钴/镍

C.Bourget等研究了Cyanex○R301二元萃取体系从硫酸盐溶液中回收钴和镍的萃取与反萃取特性,也研究了体系对钙、锰和镁的选择性特性。这些二元萃取体系由Cyanex○R301与碱性萃取剂(PrimeneJMT,AmberliteLA2,Alamine336和Aliquat336)组成。根据萃取与反萃取特性(效率和速率)及体系对钙、锰和镁的选择性,进行了筛选试验以选择最合适的二元萃取体系。从筛选试验看出,Cyanex○R301/胺体系都能从钙、锰和镁中选择性萃取钴和镍。任何一种胺被加入到Cyanex301中,都对镍和钴的萃取与反萃取动力学和效率有很大的协同作用。在胺类萃取体系中,Cy…     

从PTA残渣中回收站的工艺研究

对从PTA残渣中回收钴的工艺进行了研究。通过技术经济分析,确定了水浸PTA残渣－蒸发除有机酸－P204萃取分离钴、锰－P204萃取富集钴－碳酸盐沉钴－醋酸溶解转化结晶制备四水醋酸钴的工艺流程。试验结果表明,钴总回收率大于80％,产品质量符合我国“HG／I2032－91”标准,可用于PTA生产过程中的催化剂。     

提高铜钴矿湿法冶金过程铜钴回收率的方法概述

为了提高氧化铜钴矿湿法冶金过程中的铜钴回收率,对浸出、浸出渣洗涤、萃取、除铁锰等工艺过程进行了综合分析,并针对制约铜钴回收率的主要因素,提出了相应的解决方法。实践表明,选择合适的浸出方式、浸出渣洗涤方式,增加低铜萃取段,采用低浓度二氧化硫除铁锰工艺,能显著提高铜钴回收率。     

从PTA残渣中回收钴的工艺研究

对从PTA残渣中回收钴的工艺进行了研究。通过技术经济分析 ,确定了水浸PTA残渣 -蒸发除有机酸 -P2 0 4萃取分离钴、锰 -P2 0 4萃取富集钴 -碳酸盐沉钴 -醋酸溶解转化结晶制备四水醋酸钴的工艺流程。试验结果表明 ,钴总回收率大于 80 % ,产品质量符合我国“HG/T2 0 32— 91”标准 ,可用于PTA生产过程中的催化剂。     

溶剂萃取法制备锂离子电池用硫酸钴工艺研究

研究了用粗氢氧化钴制备锂离子电池用硫酸钴的工艺.采用稀硫酸优溶除杂、还原浸出、氧化沉淀法除铁、锰、砷,氟化沉淀法除钙、镁,P204萃取深度净化除杂;P507萃取除钠及分离镍、钴,制备出适用于生产锂钴氧化合物的电子级硫酸钴.     

用溶剂萃取—沉淀法从废锂离子电池正极材料中回收钴镍锂

采用溶剂萃取—化学沉淀法从废锂离子电池正极材料中回收硫酸钴、氢氧化镍和氟化锂,比较了萃取剂P507和Cyanex272对钴、镍的萃取分离性能。试验结果表明:1-1-1型废锂离子电池正极材料浸出液经P204除锰后,用0.5 mol/L P507或0.6 mol/L Cyanex272经两级错流萃取钴,钴萃取率分别为98.21%和99.44%,镍共萃取率分别为24.42%和4.26%,锂共萃取率分别为15.84%和5.11%,Cyanex272对钴镍的萃取分离性能明显优于P507;P507和Cyanex272负载有机相分别用CoSO_4溶液和HAc-NaAc溶液洗脱共萃取的镍和锂,然后用硫酸反萃取钴,反萃取液中Co/Ni质量比分别为3 217(P507)和12 643(Cyanex272),蒸发结晶可得高纯硫酸钴;萃余液中的镍、锂分别用NaOH和HF沉淀,可得氢氧化镍和氟化锂固体。采用此方法,废锂离子电池正极材料中的钴、镍、锂都得到有效回收。     

电解金属锰合格液中锰镁的萃取分离研究

利用P507-磺化煤油体系对电解金属锰合格液中的锰镁组分进行了萃取研究。分别对硫酸铵的浓度,P507的体积分数,皂化率,相比以及反萃工艺中的各个参数进行了探讨。结果表明:在硫酸铵浓度为78.00 g/L,P507体积分数为30%,皂化率为20%,相比为1∶1等条件下,镁的萃取率达到48.57%,锰的萃取率达到了75.00%;反萃过程中镁的最高反萃率为45.84%,但锰的反萃率均为零。该研究为电解金属锰合格液中锰镁的萃取分离提供了必要的理论依据,对我国电解金属锰生产工艺的完善有较大的促进作用。     

含银氧化锰矿选矿试验研究

山西某含银氧化锰矿通过湿式强磁选,磁选精矿含锰 37．07％,锰回收率 87．46％。原矿 S     

Improved manganese extraction in the production of manganese ferroalloys

In the production of manganese ferroalloys from ore, about 50% of the manganese in the ore is lost. The manganese lost with the enrichment-slag tailings may be returned to the production of manganese ferroalloys by dithionate method of enrichment of the slurries. A technology is developed for the production of high-carbon ferromanganese from concentrate obtained by the chemical enrichment of tailings slurries. Low-phosphorus Mn slag is used in the production of ferrosilicomanganese and refined manganese ferroalloys. A method is described for alloying hot metal with manganese from slag during the production of lowand medium-carbon ferromanganese. Processes are developed for the production of medium-carbon ferromanganese by mixing ore–limestone melt with high-carbon ferromanganese and removing the phosphorus from Mn-bearing melts by bubbling with CO. The degree of phosphorus removal (70–90%) depends on the bubbling time. By means of improved production of manganese ferroalloys and extraction of manganese from slag and slurries, the manganese extraction may be significantly increased.     

溶剂萃取法脱除锰矿浸出液中钙镁的研究

研究了低品位氧化锰矿经还原焙烧、硫酸浸出得到的原料液中钙镁杂质的祛除工艺。研究结果为：用30％的P507加70％的磺化煤油作为萃取剂;控制原料液初始pH值0.2左右;相比1：1;常温五级逆流萃取镁、钙的萃取率分别为72．06％和48．97％,锰的损失为6．35％。既有效脱除了钙镁,又抑制锰的损失,同时还避免了通常所用的氟化物沉淀法腐蚀设备的缺点。     

原位硫酸焙烧浸出低品位软锰矿及元素分离

研究了一种低品位软锰矿焙烧-水浸提锰的新方法.以锰和铁的提取率为指标,通过正交试验,确定了焙烧工艺的最合适条件为酸矿比2 ∶ 1,焙烧温度650℃,水酸比0.2 ∶ 1,焙烧时间4h.进一步研究溶出温度、溶出时间、溶出液固比等因素对锰、铁提取率的影响,确定了溶出试验的最合适条件为搅拌速度300 r/min,溶出温度90...     

Manganese extraction from slag obtained in the production of refined manganese ferroalloys

The extraction of manganese from the tailings slag obtained in the production of refined manganese ferroalloys is studied thermodynamically and experimentally. In such extraction, the slag reacts with metal melts (hot metal, ferromanganese, and ferrosilicomanganese) containing reducing elements (carbon and silicon), with the goal of increasing the overall transfer of manganese to the final manganese ferroalloys. According to the results, the reduction of manganese by carbon only occurs in the case of hot metal. A method is developed for alloying hot metal with manganese from tailings slag obtained in the production of refined manganese ferroalloys.     

菱锰矿与软锰矿混合矿浆烟气脱硫研究

在高密度矿浆（液固比3：1）湿法烟气脱硫中,单组分菱锰矿很难较长时间维持较高的脱硫率,而单组分软锰矿在脱硫时锰浸出率低。针对这些问题,通过配制不同比例菱锰矿和软锰矿的混合矿浆,考察了其对脱硫率、锰浸出率和pH值的影响。研究表明：当混合矿浆中软锰矿与菱锰矿的质量比在1：1左右时,脱硫率与锰浸出率能同时达到80％以上的较好水平,研究结果可为锰矿资源在工业和环保领域的应用提供一条新途径。     

电场强化锰矿尾矿湿法浸出行为研究

随着锰产业的迅锰发展,国内高品位锰矿逐渐枯竭,有必要探索锰矿尾矿资源化利用技术。实验采用电场强化锰矿尾矿的湿法浸出过程,并探索其强化机理。通过C射线衍射（XRD）、X射线荧光分析（XRF）、扫描电镜（SEM）以及紫外可见漫反射光谱（UV—visDRS）等检测方法,分析了碳酸锰矿尾矿的结构和成分,以及浸出反应前后的物相变化行为,研究了强化浸出工艺条件。结果表明,电场可改变矿浆颗粒表面电荷分布,强化锰矿尾矿浸出过程。在电流密度为5000A／m^2、液固比6：1mL／g、矿酸比为1：0．7、温度为60℃、时间为1h时,锰浸出率可达94．23％,与同等条件不加电场时相比提高18％,尾矿锰含量由4．33％降到0．14％。     

Purification of Cobalt Solutions from Manganese by Extraction with Mixture of Organic Acids

extraction on pH and composition of the aqueous phase, and concentration of extractants have been investigated. D2EHPA was shown to extract the metals, but monocarboxylic acids took part in extracting the complex formed by means of additional solvation.

Electronic adsorption spectra of extracts of cobalt and manganese di (2-ethylhexyl) phosphates in SMA show that there are mainly octahedral complexes in extracts. It confirms the formation of a mixed extracted complex in organic phase. In contrast to the systems with “inert” solvents, manganese oxidation by air does not occur due to stabilization of manganese (II) in octahedral complex. The conditions of purification of cobalt chloride and cobalt sulphate solutions from manganese were determined and tested on a pilot scale. According to the technological scheme the cobalt solution after purification from iron was purified from manganese by extraction with 0.6-0.8 M D2EHPA in a monocarboxylic acids (C₁-C₉ solution. Scrubbing of extracts from cobalt and stripping of manganese were conducted by hydrochloric or sulhpuric acids depending on the type of initial solution. Purified cobalt solution practically does not contain manganese and cobalt recovery was 99.5%. The suggested scheme of purification has been applied at the Norilsk Mining and Metallurgical plant for processing of manganese by-product.