Cyanex 272萃取分离硫酸钴溶液中镍钴的试验研究

采用Cyanex 272萃取剂从硫酸钴溶液中分离去除镍,在有机相组成为25%Cyanex 272+75%航空煤油(用30%NaOH皂化,皂化率75%)、萃原液pH值4.5～5.0、温度25～35 ℃、相比1.5～2条件下,经5级逆流萃取,混合萃取时间5 min,然后用1 mol/L硫酸溶液4级反萃取获得反萃取液,钴直收率达99.86%,Ni去除率达95.20%,钴镍分离效果较好。反萃取后的硫酸钴溶液中杂质含量很低,Co/Ni比达368 95,可以满足生产精制CoSO₄·7H₂O和电钴的要求。     

用N235从大洋多金属结核萃铜余液中萃取钴

研究了用N235从大洋多金属结核熔炼-锈蚀-萃取工艺中所产出的萃铜余液中萃取分离钴的方法。实验结果表明, N235萃取钴效果明显, 负载有机相中的钴能被稀酸反萃完全。采用N235萃取和稀酸反萃方法可以把Co(Ⅱ)、Ni(Ⅱ)分离开。从含钴0.85 g/L的料液中, 按相比V_O/V_A= 1/2, 经四级逆流萃取, 二级反萃可将钴富集到15.20 g/L, 萃余液中含钴0.0055 g/L, 萃余液中Ni/Co高达1 838, 反萃液中Co/Ni =1 520, 产品质量符合优质工业氯化钴质量要求, 钴镍萃取分离效果甚佳, 钴的回收率大于98%。     

P204/4PC协同萃取分离镍钴与镁钙的研究

采用新型协同萃取剂P204/4PC从含少量镍钴钙的硫酸镁溶液中选择性萃取镍和钴, 考察了萃取剂浓度、平衡pH值等因素对萃取分离效果的影响, 绘制了萃取、反萃取等温线, 并进行了串级模拟萃取-反萃取全流程实验。研究结果表明: P204/4PC协同萃取剂能从硫酸镁溶液中选择性萃取镍钴, 实现镍钴与钙镁的高效分离以及镍钴的高倍富集回收。模拟串级全流程实验结果显示, 对于含镍1.68 g/L、钴0.10 g/L、镁15.68 g/L和钙0.11 g/L的料液, 采用组成为0.25 mol/L P204+0.5 mol/L 4PC+磺化煤油的有机相经5级逆流萃取-1级洗涤-6级反萃取, 萃余液中镍和钴含量均小于0.01 g/L, 镍和钴萃取率均达到99.5%以上;反萃液中镍和钴浓度分别达到40.4 g/L和1.8 g/L, 杂质钙和镁浓度分别为0.02 g/L和0.09 g/L, 全流程钙镁除去率分别达到99.97%和99.36%。     

利用离心萃取器研究协同萃取分离镍钴

利用离心萃取器研究硫酸体系中P507和P204协同萃取分离镍钴的效果。实验研究表明P507和P204组成的协同萃取体系对镍钴的分离存在正协同效应,在有机相组成为VP507: VP204为3:2; VO：VA为1:1;水相酸度为0.2mol/L,流通量为10L/h,转速为2300r/min,常温条件下,钴的二级逆流萃取率为95.8%%,βCo/Ni为5680。负载有机用2mol/L的H2SO4溶液2级逆流反萃,Co2 的反萃取率为93.5%,反萃液中的钴离子浓度为12.6g/L。     

离心萃取器协同萃取分离镍钴

利用离心萃取器研究硫酸体系中P507和P204协同萃取分离镍钴的效果。结果表明,P507和P204组成的协同萃取体系对镍钴的分离存在正协同效应,在有机相组成VP507∶VP204为3∶2,VO∶VA为1∶1,水相酸度为0.2 mol/L,流通量为10 L/h,转速为2 300 r/min,常温条件下,钴的二级逆流萃取率为95.8%,βCo/Ni为5 680。负载有机相用2 mol/L的H2SO4溶液2级逆流反萃,Co2+的反萃取率为93.5%,反萃液中的钴离子浓度为12.6 g/L。     

N_(235)萃取净化氯化镍溶液的有机相组成及其工艺的研究

镍精矿氯气浸出液经除铁后 ,用萃取剂N2 35 萃取净化 ,研究了有机相组成对除杂效果的影响 ;确定了最佳的有机相组成为 2 5 %N2 35 — 12 %异构醇— 63 %磺化煤油 (体积分数 ) ;测定了有机相的钴饱和容量并进行了相应的串级试验。结果表明 :净化后溶液中 ρ(Ni) >2 0 0g L ,ρ(Ni) ρ(Co) >5 0 0 0 0 ,并且溶液中Cu、Fe、Mn、Zn等杂质含量也达到了生产 1号电镍的技术要求 ;产出的氯化钴溶液中 ρ(Co) >110g L ,ρ(Co) ρ(Ni) >5 0 0 0 ,实现了钴的富集。     

富钴结壳浸出液中钴镍的N235萃取分离

对大洋富钴结壳硫酸活化浸出液经萃取分离铜、锌、锰后得到的镍钴富集溶液，用N235萃取分离镍钴。钴镍氯化物溶液用N235萃取分离的最佳的萃取工艺条件为室温，相比（O／A）=2～3：1。混合时间0．5min。经四级逆流萃取、洗涤与反萃。钴萃取率达99．99％，反萃率达99．81％，反萃液钴镍比达10^6。萃取分离后得到的氯化钴和氯化镍溶液纯度高，既可满足电解沉积金属的要求，又适于生产高纯化工产品。     

废旧三元锂电池回收中间产物铝渣的资源化研究

采用氢氧化钠碱浸-碳分工艺处理废旧电池回收中间产物——铝渣, 实现了废渣中的镍钴锰与铝分离并分步回收。结果表明, 在反应温度200 ℃、氢氧化钠浓度6 mol/L、苛性比为5、碱浸5 h条件下, 碱浸液中铝浸出率可达97.70%, 镍钴锰浸出率小于0.23%; 碱浸渣经浸出-除杂-萃取后, 得到Ni、Co、Mn含量均大于100 g/L, Fe、Al含量均小于0.001 g/L的纯净硫酸镍、硫酸钴、硫酸锰溶液, 从而实现废旧三元锂电池中铝与镍钴锰的资源化高效回收利用。     

某含钴硫酸镍溶液除钴实验

考查某含钴中间产物碳酸镍硫酸溶解所得硫酸镍溶液黑镍除钴和溶剂萃取法净化除钴的效果。黑镍除钴和溶剂萃取都能达到净化硫酸镍溶液的目的 ,得到符合电解沉积的阴极液。黑镍除钴需 3段重复作业且黑镍制备成本高。溶剂萃取成本低、对环境友好 ,是比较理想的处理此含镍物料的方法。     

疏水性低共熔溶剂萃取分离镍钴的研究

采用三辛基甲基氯化铵（Aliquat 336）与薄荷醇组成的疏水性低共熔溶剂（DES）为萃取剂,从硫氰酸钠溶液中分离Co(Ⅱ)和Ni(Ⅱ),考察了SCN-浓度、温度、酸度等条件对萃取分离性能的影响,研究了Co(Ⅱ)和Ni(Ⅱ)的反萃行为,并采用紫外-可见吸收光谱分析了疏水DES萃取Co(Ⅱ)的机理。结果表明,Co(Ⅱ)和Ni(Ⅱ)的分配比随着SCN-浓度的增加而增加,温度和酸度对镍钴的萃取分离性能影响很小,优化条件下Co(Ⅱ)和Ni(Ⅱ)的分离因子大于400。萃入有机相的Ni(Ⅱ)可采用0.1 mol/L NH3?H2O + 0.1 mol/L NH4Cl + 4 mol/L NaCl溶液洗涤到水相,有机相中的Co(Ⅱ)可采用1 mol/L乙二胺完全反萃。该DES体系萃取Co(Ⅱ)的机理符合阴离子交换。     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new     

注浆加固技术在十三矿-685 m进风大巷中的应用

针对煤矿开采深度不断向深部延伸,掘进巷道受深部高应力的影响越来越大,巷道围岩整体稳定性差,矿山压力显现越剧烈现象,一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术,依据对巷道掘进之后变形监测数据的采集,对巷道变形机理进行分析研究,并对注浆时段进行了合理选择,在对巷道的注浆工艺进行了充分论证的基础上,对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要,巷道在恰当的时间内进行注浆加固施工,能有效控制巷道的变形,巷道注浆后变形量明显减小,岩体的稳定性明显增强,减少了巷道日常维修工作,降低了矿井的生产成本,保障了矿井的安全生产。     

Brief news

正China Minmetals Rare Earth Construction of Jianghua Separation Plant is set to complete at the yearend Civil works of Jianghua Separation Plant have been finished and the company is installing and debugging equipments now.It is estimated that construction of Jianghua Separation Plant will be     

Brief news

正Total transactions of rare earth in Rare Earth Ex-change Center of Hunan South Rare and Precious Metal Exchange neared 40 billion yuan from January to October From the opening in January of this year to the end of October,the total transaction of rare earth products in Rare Earth Exchange Center of Hunan South Rare and Precious Metal Exchange neared40 billion yuan.There are 16 varieties including dysprosium oxide and terbium oxide traded on the exchange center,one of the largest trading platforms for rare earth oxides in China.     

Theoretical basis for optimal collector concentrations and pulp pH values during flotation of sulfide-free minerals

A hypothesis that associates optimal conditions of mineral flotation with a zero charge of their surface is put forward. This hypothesis serves as a basis for a methodology to obtain and verify quantitative physical-chemical models for a minimal necessary concentration of a collector during flotation of sulfide-free minerals. These models may be of use for upgrading engineering processes of flotation and as a job for the concentration plant automation systems. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 89–99, March–April, 2006.     

基于LPWAN技术的采煤沉陷区杆塔倾斜监测系统

随着地下采煤活动不断加大，越来越多的输电杆塔不可避免地被建设在煤矿沉陷区。目前，现有手段采用靠人力去进行定期检查一定会浪费大量的人力和物力，因而需开展对位于煤矿沉陷区的杆塔进行实时在线检测。基于NB-IoT和LoRa提出了一种新的算法——低功耗广域网（LPWAN）技术，提出了一种新型的输电杆塔倾斜监测系统，其中包含1个主节点和多个子节点，以适应地域广和远距离的需求信息监控。该系统通过LoRa多节点网络的数据传输，将杆塔的倾斜参数通过NB-IoT上传至在线实时监控系统。管理人员可以从后台得出监测数据并分析结果，及时对处于煤矿沉陷区的有故障的输电杆塔进行针对性的维护。     

基于AutoCAD的复杂曲线绘制的实现

介绍了如何利用其他软件在AutoCAD中精确绘制各种不同规划曲线的技巧 ,很好地解决了在AutoCAD中绘制多义线方法形成复杂曲线的误差问题 ,取得了较好的效果 ,具有实际意义。