Reclaiming Cemented Carbide Scrap by Electrolysis

CHAI Li-yuan;ZHONG Hai-yun

Rare Metals and Cemented Carbides | Vol., Issue 3, 1996 | pp. 38-42

A new-type electrolytic cell is designed, in which the technology for the recovery of cemented scrap is studied. The results show that the anode passivation can be decreased through the mechanical force of the drum anode, and the current efficiency can be improved.

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Electron Probe Microanalysis of W-Ni-Fe Alloy

ZOU Xu-mei

Rare Metals and Cemented Carbides | Vol., Issue 3, 1996 | pp. 42-48

The paper describes the features of EPMA method and its applications to microanalysis of W-Ni-Fe alloy fractures and microstructures. In the first case, it details the preparation of fracture sample, defect observation and major fracturing type in the second,it details the proparation of polished microsection, and determination of the binding phase constituents, (NiFe)6W6C carbide phase and W grain size.

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5-Br-PADAP Spectrophotometry of Nb and Ta in W Concentrate and Difficult Cassiterite

LI Tian-rui

Rare Metals and Cemented Carbides | Vol., Issue 3, 1996 | pp. 48-51

Use of spectrophotometry with several wave lengths in mixed complex system with 5-Br-PADAP developer to determine Nb and Ta from W concentrate and cassiterite can make the determination fast, accurate and sensitive with relative standard deviation 0. 021 (n= 16). The paper deals with this method.

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Treatment of Industrial Waste KaTaF7

LI Ji-hua

Rare Metals and Cemented Carbides | Vol., Issue 3, 1996 | pp. 51-52

The process for the treatment of industrial waste KaTaF7 is introduced and the basic reaction mechanism is described.

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Internal Profits Allocation in the Enterprise and Psychological Balance of the Employees ──Preliminary Study on the Modern Enterprise Management

NIE Zhi-hua

Rare Metals and Cemented Carbides | Vol., Issue 3, 1996 | pp. 53-56

Man is the most important factor in enterprise management.The matter of the utmost concern for employees is the internal profit allocation. From this view-point, the paper describes the mechanism of balance of the employees, unbalance reasons and their influence on enterprise management. The suggestions, how to reach the balance, are also given from author's experience.

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The Applications of Electrodialysis by Liquid Membrane

ZHANG Rui-hua;HUANG Xi-bao;TANG Hua

Rare Metals and Cemented Carbides | Vol., Issue 3, 1996 | pp. 56-62

The paper ilas described the liquid membrane electrodialysisprinciple and applications including the concentration and the extraction of compound and/or element the svnthesis of high pure substance,and the desalination The liquid membrane electrodialysis combines the chemical reaction,the diffusion process and the electrical transfer,so that it has a wide application prospect.

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Study of H_3 PO_4 Dynamic Leaching for Treatment of Low-cobalt Cemented Carbide Scraps

DI Xin;ZHOU Chang-song;MIAO Xing-jun

Rare Metals and Cemented Carbides | Vol., Issue 2, 1996 | pp. 1-6

H3 PO4 leaching method in presence of oxidizer was used to study the decomposing of the low-cobalt cemented carbide scraps.Based on the results of exper iment, a proper reclamation route was founded. The paper describes the experiment.

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Influence of Concentration-varied Para-cotanol Solvents on Ta & Nb Extraction and Stripping Properties

ZHANG Yao-hua;CHEN Ji-ming

Rare Metals and Cemented Carbides | Vol., Issue 2, 1996 | pp. 6-9

Study is made of infIuence of taree concentration-varied commercial para-octanol solvents on Ta & Nb extraction and stripping properties.The results show that there are different extraction and stripping results for Ta & Nb when the concentration of para-octanol solvent is changed.For the treatment of high-grade tantalite & niobite and low-grade tantalum ilmenorutile,para-octanol solvents with different concentration can be used to improve the product quality,recovery of Ta and Nb and the operating conditions.

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Fatigue Crack Growth of the High Damping Zn-Al Alloy Containing Trace Ce

ZHOU Shan-chu;LIU Wei-gao;LUO Bing-hui

Rare Metals and Cemented Carbides | Vol., Issue 2, 1996 | pp. 10-14

The fatigue crack growth rate da/dN of a high damping ZnAl eutectoid alloy containing trace Ce has been measured and compared.The writers consider that the lower da/dN value of the alloy is related to the higher internal friction value with Ce-free Zn-Al a11oy.

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Influence of Ce on the Non-metallic Inclusions and the Properties of the ZG75CrMo Steel

YANG Zi-xia

Rare Metals and Cemented Carbides | Vol., Issue 2, 1996 | pp. 14-19

Study is made on the influence of Ce on the non-metallic inclusions and the properties of the ZG75CrMo steel.The results show that addition of Ce to ZG75CrMo steel could decrease the contents of inclusions.lodify their characteristis,and result in greatly incrase.in plasticity,toughness,thermal fatigue resistance and high temperature oxidation resistance of the steel,

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