硫酸钴溶液析钴研究及生产实践

研究某硫酸钴溶液漂水析钴的工艺条件并应用于生产实践。结果表明 ,在氯碱比 5 0～ 5 5 g/L∶3 7～ 40g/L ,始温 3 5～40℃ ,终温不超过 60℃ ,始点pH 1 5～ 2 0 ,终点pH 2 5 ,漂水加入速度为 3 0L/min的条件下 ,含杂硫酸钴溶液漂水析钴 ,所获粗氢氧化钴含钴 >43 % ,锌、锰、铜、镍、铁、砷等杂质含量较低 ,母液含钴 <0 0 6g/L ,钴收率 >98%。     

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%。     

广西某低品位铜镍矿选矿试验研究

广西某低品位铜镍矿含铜0.11%,含镍0.18%,铜矿物主要为硫化铜,镍矿物为镍黄铁矿。试验采用浮选—磁选联合工艺流程,在进行了详细的条件试验下,获得了较好的选矿指标。铜镍精矿产率1.83%,品位:铜4.81%、镍7.34%、钴0.31%、银230.60 g/t;回收率:铜88.69%、镍80.12%、钴55.76%、银78.75%。     

氨性溶液中铜镍钴的萃取分离

采用PT5050萃取剂，分离和富集镍矿氨液中的铜、镍、钴。采用2级萃取，溶液中铜、镍的萃取率可达99．5％以上，钴不被萃取，经3级低酸选择性反萃镍，镍的反萃率达99％以上，镍反萃液中铜含量小于0．001g/L，满足电镍生产要求。有机相经高酸（180g/L H2SO4)反萃铜，铜反萃液生产电铜或结晶硫酸铜。用硫化钠沉淀萃余液中的钴，钴的沉淀率大于96％，所得到的钴硫精矿含钴大于40％。     

某富钴低镍锍矿的铜镍钴分离技术研究

某公司生产的富钴低镍锍为人造金属硫化矿石,矿石中富含镍、铜、钴等有价金属。结合该矿石工艺矿物学特性,对原矿进行一段磨矿,采用一次粗选—五次精选—二次扫选的工艺流程对该矿石进行了选矿试验。在磨矿细度-0.053mm占96%,用NaOH调节矿浆pH值至12.5～12.6,捕收剂S11016用量为110g/t的条件下进行全流程闭路试验,获得了含铜62.98%、含镍5.06%的高品位铜精矿和含镍42.65%、含铜5.66%的镍精矿;钴在镍精矿中富集,回收率为97.00%。该工艺选矿指标良好,较好地实现了富钴低镍锍矿石中铜与镍钴的浮选分离。     

氧化铜钴精矿浸出试验研究

以硫酸为浸出剂, 针对某含铜5.75%、含钴0.34%、以铜计氧化率为78.96%的氧化铜钴精矿进行了浸出工艺研究。结果表明, 在浸出温度50 ℃、酸矿比0.3∶1、液固比4∶1、浸出时间6 h条件下, 以渣计铜浸出率达到94.34%、钴浸出率达到97.57%, 浸出液中铜含量为12.38 g/L, 钴含量为0.73 g/L, 铁、锰、镁等杂质含量均较低。     

废电池合金制备氯化镍溶液的工艺研究

对用废旧电池熔铸的含镍废合金制备氯化镍溶液的工艺进行了研究.采用的工艺流程为:盐酸体系膜电解→化学沉淀法除杂→萃取除杂.通过该工艺流程获得的三级萃余液中镍含量大于30 g/L、铁为痕量、钴为0.51 g/L、铜含量小于0.0183 mg/L,该溶液可直接用于电镍生产.     

改性大洋富钴结壳吸附铜的研究

研究改性大洋富钴结壳对铜的吸附过程,测定改性大洋富钴结壳对Cu2+的吸附容量,考察介质pH、初始浓度、吸附时间等因素对吸附过程的影响。结果表明,改性大洋富钴结壳吸附Cu2+适宜的pH值是2-6,吸附符合Langmuir等温吸附规律,饱和吸附容量约为90mg/g。在室温下,含铜151.0mg/L的废水经3.750g/L改性大洋富钴结壳处理2h后,其铜残余浓度为0.30mg/L,低于国家规定的工业废水一级排放标准(GB8978-1996)(Cu≯0.5mg/L)。改性大洋富钴结壳是一种具有应用潜力的含铜废水的水处理剂。     

青海某镍多金属矿选矿试验研究

本文针对青海省某铜镍钴多金属矿进行选矿实验研究,该矿为原生硫化矿,原矿中的镍、铜、钴的含量分别为0.80%、0.20%、0.025%,铜矿物主要为黄铜矿,镍矿物主要为镍黄铁矿,钴以类质同象形式赋存在镍黄铁矿中,非金属矿物主要为透闪石、滑石、辉石。采用以铜为主的滑石-铜镍等可浮-尾矿强化回收镍工艺流程,闭路试验指标,铜精矿含铜25.15%,含镍1.23%,铜回收率62.14%;镍精矿含镍7.95%,含铜0.40%,含钴0.24%,镍回收率80.67%,钴回收率75.76%。     

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     

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,     

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。     

矿井摩擦式提升机制动力补偿装置的设计

讨论了在煤矿提升机二级制动的基础上 ,对制动力矩进行补偿 ,保证提升机紧急制动时的减速度维持在《煤矿安全规程》规定的范围内。