Application of Thermodynamic Calculations to the Pyro-refining Process for Production of High Purity Bismuth

2016 ◽  
Vol 48 (1) ◽  
pp. 73-90 ◽  
Author(s):  
Mohammad Mezbahul-Islam ◽  
Frederic Belanger ◽  
Patrice Chartrand ◽  
In-Ho Jung ◽  
Pascal Coursol
Keyword(s):  
High Purity ◽  
Refining Process ◽  
Thermodynamic Calculations

Preparation of High Purity Tellurium by Zone Refining Process

PRICM ◽  
2013 ◽  
pp. 2679-2685
Author(s):  
Wan Gou Kim ◽  
Hong Youl Ryu ◽  
Man Sik Kong ◽  
Soon Jik Hong ◽  
Hwa Young Lee ◽  
...  
Keyword(s):  
High Purity ◽  
Refining Process ◽  
Zone Refining

scholarly journals Development of Refining Process for Production of High Purity Ultra-low-carbon Steel

1990 ◽  
Vol 76 (11) ◽  
pp. 1932-1939
Author(s):  
Nobukazu KITAGAWA ◽  
Hisashi OSANAI ◽  
Masahito SUITO ◽  
Shigeru OHMIYA ◽  
Yoshiei KATO ◽  
...  
Keyword(s):  
Carbon Steel ◽  
High Purity ◽  
Low Carbon Steel ◽  
Refining Process ◽  
Low Carbon ◽  
Ultra Low Carbon Steel

Preparation of High Purity Tellurium by Zone Refining Process

2013 ◽  
pp. 2679-2685
Author(s):  
Wan Gou Kim ◽  
Hong Youl Ryu ◽  
Man Sik Kong ◽  
Soon Jik Hong ◽  
Hwa Young Lee ◽  
...  
Keyword(s):  
High Purity ◽  
Refining Process ◽  
Zone Refining

scholarly journals Characterization and Interpretation of the Aluminum Zone Refining through Infrared Thermographic Analysis

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2039
Author(s):  
Xiaoxin Zhang ◽  
Semiramis Friedrich ◽  
Bernd Friedrich
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
High Purity ◽  
Refining Process ◽  
Crystal Growth Rate ◽  
Molten Zone ◽  
Zone Refining ◽  
Ir Camera ◽  
Zone Length ◽  
Thermographic Analysis

High purity metals are nowadays increasingly in demand to serve in electronic, photovoltaic, and target materials industries. The zone refining process is the most common way to achieve high purity in the final step of metal purification. Zone length and crystal growth rate are the main parameters that control the zone refining process. To determine these values, information about temperature profiles in the molten zone is necessary due to its direct correlation with these values. As the determination of this profile is not practically achievable in the present, the novel approach of applying an infrared (IR) camera during the zone refining of 2N8 aluminum is the focus of the investigation in this work. The whole temperature profile of the region near the molten zone was recorded by IR camera during the entire running process. The zone length and the crystal growth rate at each thermographic image shooting moment were successfully extracted by thermographic analysis. Results showed that both factors varied significantly, which is in contrast to the assumption in literature about their stability while running under constant input power and heater movement velocity, though noticeable purification took place in all of these experiments. However, the impurity concentration during refinement fluctuated remarkably. This was well-demonstrated by the tendency of variation in crystal growth rate attained in this work. These results provide a better understanding of the mechanisms of zone refining with an inductive heater and contributes to the optimization of the process.

Recycling high-purity silicon from diamond-wire saw kerf slurry waste by vacuum refining process

2020 ◽  
pp. 124979
Author(s):  
Jian Kong ◽  
Donghui Wei ◽  
Pengfei Xing ◽  
Xing Jin ◽  
Yanxin Zhuang ◽  
...  
Keyword(s):  
High Purity ◽  
Refining Process ◽  
Diamond Wire ◽  
Vacuum Refining ◽  
Wire Saw ◽  
Diamond Wire Saw ◽  
High Purity Silicon

Synthesis and Characterization of High Purity Ruthenium Sponge

2016 ◽  
Vol 850 ◽  
pp. 489-493
Author(s):  
Wei Yi ◽  
Ze Na Xin ◽  
Yue Sheng ◽  
Zhi Long Tan ◽  
Jun Min Zhang ◽  
...  
Keyword(s):  
High Purity ◽  
Electrode Materials ◽  
Reduction Method ◽  
Hydrogen Reduction ◽  
Refining Process ◽  
Synthesis And Characterization ◽  
Chemical Refining ◽  
Powder Density ◽  
Average Size

Ruthenium is widely used as catalyst, magnetic recording and electrode materials. In this study, high-purity (≥99.995 wt%) ruthenium sponge was synthesized from crude ruthenium (≤99.9 wt%) by chemical refining technique. Initially, crude Ru was transformed into H2RuCl6 by distilling treatment. The H2RuCl6 was, then, added with NH4Cl powder to precipitate (NH4)2RuCl6 powder. Afterward, the (NH4)2RuCl6 powder was ignited in air and transformed into RuO2. Finally, RuO2 was changed to Ru by hydrogen reduction method. Impurities included in the starting Ru powder were eliminated after distillation and precipitation treatments. As-obtained ruthenium particles were spherical-like agglomeration, the average size was about 6 μm and the powder density was 11.83 g/cm3. The details of chemical transforming mechanisms in the refining process were described.

scholarly journals Production of High Purity Metals: A Review on Zone Refining Process

2018 ◽  
Vol 08 (01) ◽  
pp. 33-55 ◽  
Author(s):  
Xiaoxin Zhang ◽  
Semiramis Friedrich ◽  
Bernd Friedrich
Keyword(s):  
High Purity ◽  
Refining Process ◽  
Zone Refining
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