ON THE WETTABILITY OF CARBON ELECTRODES BY MOLTEN CRYOLITE-ALUMINA ELECTROLYTE

<正> 在冰晶石-氧化铝熔盐电解中,电解质向阴极渗透以及在阳极上发生阳极效应,这些过程都和电解质对炭电极的湿润性有关系。将近二十年前Жемчужина和Беляев曾在电极极化条件下研究NaF-AlF_3,Na_3AlF_6-Al_2O_3系以及含有盐类添加物的冰晶石熔液在炭板上的湿润角,但试验用电流强度较小(0.01—0.3A)。我们在实验室用微型电解槽,采取较大的电流强度(0.1—5.0A,其中包括与工业上铝电解槽阳极电流密度值     

高纯均匀A1-V4中间合金制备工艺研究

利用铝热还原法，通过过量铝粉一步还原工业V2O5得到Al－V50合金。在300kg熔铝用中频感应炉中， 温度1050－1150℃，把Al－V50分批加入Al99．85熔体，机械装置强力搅拌条件下。可以生产出优质高纯且成分均匀的Al－V4中间合金，并用于生产各种大型复杂关键的ZL205A合金铸件。     

Formation of metal fog during molten salt electrolysis observed in a see-through cell

Visual observations of several molten salt electrolysis processes were made in a two-compartment, see-through quartz cell. The electrolyses of aluminium, magnesium, lead, zinc, sodium and potassium were studied. The colour of the melt in the anode compartment was pale yellow for fluoride-chloride melts and red for chloride melts, caused by the presence of dispersed anode gases during electrolysis. In the cathode compartment, streamers of metal fog were formed. The colours of the metal fog were purple for aluminium, grey for magnesium, lead and zinc, blue for sodium and green for potassium.The metal fog tended to sink to the bottom of the cell, which indicated that it had a higher density than that of the melt. The metal fog also penetrated into the anode compartment, probable due to convection and diffusion in the melt. The most probable explanation of the nature of the metal fog is that it consisted ofdispersed metal particles. This chemically unstable phase dissolved easily in the melt and was oxidized quickly by the anode gases.     

浅谈企业思想政治教育的创新

分析了开展企业思想政治教育创新的意义,提出了企业思想政治教育在教育观念、方法和模式方面创新的思路。     

Copper-nickel superalloys as inert alloy anodes for aluminum electrolysis

The superalloys Cu-Ni-Al, Cu-Ni-Fe, and Cu-Ni-Cr were studied as anodes for aluminum electrolysis. The alloys were tested for corrosion in acidic electrolyte molten salt and for oxidation in both air and oxygen. The results showed that the Cu-Ni-Al anodes possess excellent resistance to oxidation and corrosion, and the oxidation rates of Cu-Ni-Fe and Cu-Ni-Al anodes were slower than those of pure copper or nickel. During electrolysis, the cell voltage of the Cu-Ni-Al anode was affected most by the concentration of alumina in cryolite molten salt. The Cu-Ni-Fe anode exhibited corrosion resistance in electrolyte molten salt. Comparatively, the Cu-Ni-Cr anode showed poor resistance to oxidation and corrosion. The testing found that further study is warranted on the use of Cu-Ni-Al and Cu-Ni-Fe as inert alloy anodes. For more information, contact Zhongning Shi, Northeastern University, School of Materials and Metallurgy, WenhuiRoad No. 3, Shenynag, Liaoning 110004 China; e-mail znshi@163.com     

在熔盐中电镀Al—Mn合金的工艺研究

本文在酸性的氯化物熔盐体系中，通过一系列探索性试验和霍尔试验确定了获得光亮性Ａｌ－Ｍｎ合金镀层的工艺条件，同时也研究了不同组成的Ａｌ－Ｍｎ合金镀层的表面形貌，微观结构和性能，结果表明：在实验条件下，熔盐组成和阴极电流密度对镀层的光亮性，表面形貌，镀层成分以及镀层结构和性能均有很大影响。具有非晶态结构的光亮性Ａｌ－Ｍｎ合金镀层呈现出较高的耐蚀性和硬度。     

铝电解槽炭渣的综合利用研究

研究了铝电解槽炭渣的组成和浮选法综合利用工艺。试验表明：浮选法能使炭渣中的炭和电解质得到良好的分离；浮选炭粉可用作制造自烙铝电解槽阳极的配料；浮选电解质经600℃焙烧后再用作铝电解质。本工艺流程简单，成本低，易于工业化应用。     

锂盐在铝电解中的作用

报道了锂盐在铝电解中的作用.阐述了其提高熔体的电导率,降低电解质的熔点,减少铝的溶解损失,减小极化电压,降低电解质的蒸气压及延长阴极寿命等优点.提出锂盐与其它添加剂的有机结合,可获得更大经济效益和社会效益的构想.     

刍议建筑工程施工的质量控制措施

目前,随着经济的发展以及人们生活水平的提高,建筑行业逐渐兴起,一定程度上引起了人们的广泛关注。为了能够更好地探讨建筑工程施工质量控制措施,本文从建筑施工质量问题特点出发,对施工质量控制措施进行了研究。     

球型惯性元件配合间隙差动共焦精密测量方法

配合间隙是决定球型惯性器件精度和可靠性的关键参数之一,针对球型惯性器球面元件表面有缺口且未完全抛光导致曲率半径难以精确测量,进而难以准确控制球碗、球冠配合间隙瓶颈问题,提出了一种球面惯性元件配合间隙激光差动共焦高精度方法。该方法利用抗散射的激光差动共焦曲率半径测量方法分别对球碗、球冠的曲率半径进行测量,然后利用差动共焦曲率半径测量系统测得的球碗和球冠的半径差来控制球型惯性器球面的配合间隙。理论分析与实验验证表明:该方法测量球冠和球碗配合间隙的相对扩展不确定度优于20×10~(-6),其为惯性器件球冠和球碗配合间隙的高精度测量与控制提供了一种全新的技术手段。