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对镍电积工艺近年来的技术进展进行了分析,对镍电积工艺的现状和先进技术、理念进行了概括总结.现代的镍电积厂房设计着眼于改善电积厂房操作环境、提高劳动生产率、提高产品质量以及降低能耗的方向发展.国外镍电积生产厂家在镍电积生产上进行了一些有益的技术改进,值得我国的镍电积工艺相关设计、生产人员借鉴. 相似文献
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以自制的胺类氯盐作为NH_3-NH_4Cl-H_2O体系下电积锌的添加剂,考察不同种类的胺类氯盐对阴极锌表面形貌及电流效率的影响,遴选出最佳电积锌添加剂。结果表明,使用大分子胺类氯盐或多分子胺类氯盐作为添加剂,电积锌的电流效率分别达到93.25%和91.67%,阴极产品表面较为平整、致密的。 相似文献
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镍离子对长周期锌电积的影响 总被引:1,自引:0,他引:1
通过对槽电压,电流效率,电能消耗和阴极极化曲线分析,阐明了镍离子在硫酸锌电积液中的行为和对长周期锌电积的影响。研究表明,当溶液中镍离子的浓度大于0.15 mg/L时,将对48 h长周期电积产生很大的影响。 相似文献
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概述了我国铜电积工业的发展历程与现状,总结了铜电积工艺的成果与不足,重点评述对阳极材料、电积添加剂及其检测、电解液杂质离子除杂等的研究。 相似文献
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P.E.Tsakiridis和S.Agatzini-Leonardou研究了用膦类萃取剂Cyanex272和Cyanex302从硫酸镍溶液中同时萃取分离Co(Ⅱ)和Mg(Ⅱ)。水相中的镍用Cyanex272浓缩,然后用合成的镍废电解液反萃取,产生适合于镍电积的溶液。 相似文献
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W. G. Sherwood P. B. Queneau C. Nikolic D. R. Hodges 《Metallurgical and Materials Transactions B》1979,10(4):659-666
A laboratory scale cylindrical fluidized cathode cell is evaluated as a means for electrowinning nickel. Key parameters affecting
nickel deposition are characterized: cathode current feeder design, flow distribution systems, anode configuration, temperature,
current density, pH, nickel concentration, electrolyte conductivity, and electrolyte impurities. A study is made of anode/cathode
separator membranes. Titanium, steel shot, graphite, sand, nickel shot, and nickel oxide are evaluated as bed materials. 相似文献
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Dazhi Huang Lida Shen Jinsong Chen Jun Zhu 《Transactions of the Indian Institute of Metals》2014,67(3):351-357
In friction aided jet electrodeposition (FAJED), nozzle outlet width, flow of electroplating solution passing through the nozzle, and the distance between nozzle and cathode could influence the flow field on the cathode surface. In this research, a flow field mathematical model of FAJED was constructed using FLUENT to simulate the velocity on the cathode surface and investigate the influence of cathode surface velocity on the quality of nickel film produced experimentally. Results illustrated that in the area influenced by deposition on the cathode surface, moderate and well-distributed velocity on the cathode surface was conducive to the production of low-defect count nickel films. Combined with the friction of free particles on the deposition layer, moderate velocity and its even distribution on the cathode surface were chosen to obtain flat, compact deposition layers and process rotational parts. 相似文献
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采用循环伏安法研究镍电解液中杂质铅、锌、硫、硒在镍电解精炼中的电化学行为。结果表明,铅、锌在阴极还原为金属单质,硫、硒则与镍离子生成NixSy及NixSey。采用阴极极化法研究了电解工艺条件即温度、pH、氯离子浓度对杂质铅、锌、硫、硒的还原电势的影响。在工业生产中可根据杂质控制的需要来调整电解条件,从而减少部分杂质元素在阴极析出的总量。 相似文献
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The influence of electrolytic variables on the content of Zn, Ni and Pb in copper deposited cathodically from ammine solution has been investigated. Solutions spiked with zinc or nickel sulphate were studied using a rotating cylindrical titanium cathode and a lead anode.The nickel and zinc contents in the cathodic deposit increase with increasing current density and their concentration in the electrolyte. A rise in the rotation speed of the cathode increases the lead and nickel contents but diminishes the zinc content in the deposit.To explain these results an attempt has been made to schematically reconstruct polarisation diagrams for each metal. Direct potential measurements are subject to considerable experimental error in the system studied. Polarisation measurements performed on a simplified system were in good agreement with the hypothetical diagram. 相似文献
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以Y2O3为电解原料,以金属镍棒为自耗阴极、石墨板为阳极,在常规的石墨电解槽中采用氟化物体系熔盐电解法制备了YNi合金.研究了电解时间、电解温度、电解质组成、阴极电流密度等主要技术参数对电解过程的影响,并对所制备的钇镍合金进行了表征.结果表明,熔盐电解制备钇镍合金的较优工艺条件为:电解温度1000℃,电解质YF3与Li... 相似文献
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侯慧芬 《有色金属材料与工程》1988,(5)
采用在隔膜槽中,通过电解精炼生产纯镍。文中着重探讨了镍阴极沉积物表面质量问题,即沉积物中气孔的形成、沉积物表面粒子的生长、氧化色和夹层等缺陷产生的原因,及其消除的方法。 相似文献
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本文介绍了电解镍经中频感应电炉熔化,生产水碎镍粒的工艺,并对熔体温度、溢流高度、水温、水压、水量、还原剂等影响因素进行了探讨。 相似文献