Mullite Refractory and Application of Rare Earths

WEI Kun

Rare Metals and Cemented Carbides | Vol., Issue 3, 1997 | pp. 45-49

介绍了莫来石的性能、研究现状和用途，对莫来石的两种生产方法及稀土对莫来石的改性作用进行了评述，展望了稀土莫来石高级耐火材料的应用前景。

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Recovery of Ti from the Raffinate of High-Ti Ore Solvent Extraction

HU Zhang-ming;CENG Fang-ping;ZHANG Zhi-xin

Rare Metals and Cemented Carbides | Vol., Issue 3, 1997 | pp. 50-51

The paper describes the study of Ti recovery from the raffinate of high-Ti ore solvent extraction.Quite pure KaTiF6 and TiO2 are obtained through MIBK exrtaction for Fe removal,preparation of Na2SiF6 by NaCl to desilicate and crystalline.The said process is well coordinated with the existing Ta/Nb hydrometallurgy flowsheet.However,the Ti recovery is yet to be improved

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Calculation of Secondary Phase Content in Hypoeutectic and Hypereutectic Alloys

LIU Sha

Rare Metals and Cemented Carbides | Vol., Issue 3, 1997 | pp. 52-53

A simple calculation method for relative contents of secondary phase in hy poeutectic dissolubility solution and hypereutectic alloys of limited solid solution deduced in this paper it is of great importance for theoretical study on secondary phase

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Great Importance of RE Energy-Saving Lamps Production to Hunan Province

GUAN Guo-ping

Rare Metals and Cemented Carbides | Vol., Issue 3, 1997 | pp. 53-55

Great importance of RE energy-saving lamps production to Hunan is described in terms of lamp features,its market and Hauan's RE advantages.

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Production,Applications and Outlook of ITO Film

WEN You

Rare Metals and Cemented Carbides | Vol., Issue 3, 1997 | pp. 56-59

The paper introduces the properties of ITO film. process technologies and its applications in the fields of automobile,aerospace,,construction,electronics, etc and outlooks the production and the market.

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Recent Development and Application of Surface Treatment and Coating Technology

HUANG Jin-chang;XU Xiu-ru

Rare Metals and Cemented Carbides | Vol., Issue 3, 1997 | pp. 60-62

Physical vapor deposit ion coating are widely used in industry.New coating technology,such as duplex treatment,TiN deposition at low temperature and Ti2N coatings,are still under investigation and their field of application is not yet fully known.This paper describes the description,properties and future application of these coating systems

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Study on Recovery of RE from Elution Deposit Ore in Weathering Crust of Biotite Granite

HE Lun-yan;ZHOU Xin-mu;HE Yi;WANG Shi-nan

Rare Metals and Cemented Carbides | Vol., Issue 2, 1997 | pp. 1-6

Study was made on recovery of RE from the elution deposit ore in weatheringcrust of biotite granite. The raw material is leached by a selected strong-acid ammonium salt(ammonium sulfate .ammonium chloride and ammonium nitrate, etc. ). The extraction ratereached more than 95%. Leached solution of RE is controlled for PH by aqua ammonia, purified with ammonium sulfide, and precipitated with oxalate or ammonium bicarbonate to obtain pure oxide of RE.

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Study on the Solvent Extractive Separation of Tungsten and Molybdanum from Sodium Tungstate Solution Containing High Molybdanum

GU Hang;WANG Jian-ling;WANG Ji-min;LI Xing-ying

Rare Metals and Cemented Carbides | Vol., Issue 2, 1997 | pp. 7-11

Without adding complex reagents, the solvent extractive separation of tungsten and molybdamun by N263 in suiiuric acid system has been studied' The effect of manyfactors in the process of mono-step separation has been investigated, and the perfect conditions of separation has been found. Results of the multi-steps show that ratio of molybdamim to tungsten trioxide in stripping liquid (ammonium tungstate) is not more than 0.01percent and attained the quality demand for separation.

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Factors Affecting the Oxidation Roast of Iran's Mo Concentrate

HE Shu-rong

Rare Metals and Cemented Carbides | Vol., Issue 2, 1997 | pp. 11-15

Oxidation roast test of iran's Mo concentrate in a rotary tube electric furnacehas revealed that physical and chemical properties of the concentrate has a great effect on itsoxidation roast performance, and in order to obtain satisfactory cinder from this type concentrate proper measures must be taken during roasting.

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Improvement of Te Recovery from Te-containing Residues

NIE Bao-sheng

Rare Metals and Cemented Carbides | Vol., Issue 2, 1997 | pp. 15-17

Experiments and comparision analyses were made on improved technology asto grade and one-pass recovery of Te. Results indicate that addition of CaCl2: solution atleaching and purification stages can greatly increase the Te grade and its one-pass recovery.

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