Research on the Relationship between the Coercive Force and Maximum Sintering Temperature of WC-Co Cemented Carbides

FAN You-ming;SHI Zhang-ming;CHEN Yi

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 18-20

The factors that affect the coercive force of cemented carbides are analyzed theoretically. Under high-temperate operation mode and actual operation mode,the coercive force is mainly relatedto the maximal sintering temperature. Research is carried out on the high temperature field of PVA sintering furnace. Data processing and analysis is done to obtain the quantitative relationship between coercive force and maximal sintering temperature.

DOI: Cited: 0 Download: 0

In and Ge Integrate Recovery during Zn Metallurgy

DENG Meng-li;XIE Bing

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 21-24

The article discusses the distribution, enrichment and integrate recovery of In and Ge in Zn metallurgy with I. S. P or hot-acid-leaching process. It is pointed out that the use of pressure leaching of Zn concentrate can directly enrich sornemetal values such as Zn, In and Ge, during Zn extraction with large leaching rate and recovery.

DOI: Cited: 0 Download: 0

Study and Practice of Selective Dissolution with HCl for the Recovery of RE Elements from NdFeB Scrap

WANG Yi-jun;LIU Yu-hui;WENG Guo-qing;LI Si-yong;LIU Rong-li;WANG Su-ling

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 25-27

The paper describes basic process flowsheet of HCl selective dissolution for the recovery of RE elements from NdFeB scrap. Extractive separation of Nd and Dy is done in the production line to obtain Dy203 （purity ≥99% mass） with RE impurity up to the Chinese national standard and RE overall recovery 〉92%. The said process is characterized by reliable technology, low industrial operation cost and quick economic return.

DOI: Cited: 0 Download: 0

Application of Contact Filtration Process into Effluent Treatment in the Chemical Smelter

YAN Min

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 28-30

By depth filtration of suspended material in effluent after treatment using contact filtration process,the total Zn and Cd concentration in the effluent discharge can be dropped to 1.50 mg/L and 0.05 mg/L respectively and the availability of effluent after treatment can be improved from 10 % to 60 %. Effluent discharge coefficient is 7- 8 m^3 per ton of production. Effluent discharge can meet the environmental protection requirements of the government.

DOI: Cited: 0 Download: 0

Review and Applications of Arsenazo RE Developer in Photometric Analysis

WANG Yong;YU Xiu-lan;SHU Yan;ZHANG Li-qing

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 31-34

In the paper,arsenazo RE developer was reviewed, focusing on the coloring reaction system,max. absorption wave length/molar absorption factor/detection limit and the interference in corresponding photometric analysis as well as the relevant applications .

DOI: Cited: 0 Download: 0

The Latest Development of the Comprehensive Utilization and Recovery of Precious Rare Metals from Molybdenum Resource in China

ZHANG Wen-pu

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 35-39

The paper reviews the latest research and development of comprehensive utilization and recovery of precious and rare metals from molybdenum resource in China. Analysis and future development is also presented.

DOI: Cited: 0 Download: 0

The Comprehensive Exploitation and Utilization of Mo Resource in Stone Coal

FU Jian-gang;ZHONG Hong;WANG Hui;JIA Li-juan;WEI Zhi-feng

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 40-43

The characteristics, and current development and utilization of molybdenum ore in the stone coal are described. And tendency to further research and utilization of Mo resource is prospected with reference to environmental requirement and comprehensive utilization.

DOI: Cited: 0 Download: 0

Research and Application of External Magnetic Field in the Directional Solidification

LI Qing-lin;WU Chun-yan

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 44-47

In view of the influence of magnetic field on the solidified structure, the paper reviews the latest application and development of alternating and steady magnetic fields during directional solidification, and summarized the microstructure action mechanism of the external magnetic field indirectional solidification. The future development directionis also prospected.

DOI: Cited: 0 Download: 0

The Latest Research into the Influence of Al Content on the Structure and Properties of(Ti,Al)N Film

LI Guo-fang;WANG Shun-hua;SHI Zong-li;HU Yuan-jie

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 48-52

The paper reviews the action mechanism of Al element in（Ti,Al）N film, and the influence of Al content on the （Ti, Al） N film structure, high-temperature-resistant oxidization, wearability and bonding strength etc. The future development is directed.

DOI: Cited: 0 Download: 0

The latest Development of Sm_2Fe₁₇N_x Rare-earth Permanent Magnetic Material

XUE Ping;GUO Xue-yi

Rare Metals and Cemented Carbides | Vol., Issue 2, 2007 | pp. 53-57

In this paper, the crystal structure, the intrinsic magnetism, and the relationship between magnetic properties and the number of N atoms of rare-earth permanent magnetic material are briefly analyzed. Meanwhile,the methods and existing problems of preparing Sm2 Fe17Nx permanent magnetic material are especially described. Finally,the latest development and future development trend of the said material are pointed out.

DOI: Cited: 0 Download: 0