- Study on the Reduction of Forging Oxide Scale using Hydrogen
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Dong-Won Lee, Jung-Yeul Yun, Shun-Myung Shin, In-Soo Kim, Jei-Pil Wang
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J Korean Powder Metall Inst. 2013;20(3):174-179.
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DOI: https://doi.org/10.4150/KPMI.2013.20.3.174
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- The study on the fabrication of iron powder from forging scales using hydrogen gas has been conducted on the effect of hydrogen partial pressure, temperature, and reactive time. The mechanism for the reduction of iron oxides was proposed with various steps, and it was found that reduction pattern might be different depending on temperature. The iron content in the scale and reduction ratio of oxygen were both increased with increasing reactive time at 0.1atm of hydrogen partial pressure. On the other hand, for over 30 minutes at 0.5 atm of hydrogen partial pressure, the values were found to be almost same. In the long run, iron metallic powder was obtained with over 90% of iron content and an average size of its powder was observed to be about 100µm.
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Citations
Citations to this article as recorded by  - Effects of expanded graphite content on the performance of MgO‐C refractories
Junseong Kim, Seunghwa Jeong, Minsuk Lee, Dong Jae Kang, Hong‐woo Park, Hwa‐In Lee, Dong‐Yeol Yang, Eun Hee Kim, Soonil Lee, Seung‐Cheol Yang, Sang‐Chae Jeon
International Journal of Applied Ceramic Technology.2023; 20(6): 3803. CrossRef - Smithing Processes Based on Hammer Scale Excavated from the Third- to Fourth-Century Ancient Iron-Making Sites of the Korean Peninsula
Dayeon Jung, Heehong Kwon, Namchul Cho
Materials.2022; 15(12): 4188. CrossRef
- Trend in Research and Development of Recovery of Valuable Metallic Powder from Wasted Batteries
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Shun-Myung Shin, Sung-Ho Joo, Dong-Won Lee, Jung-Yeul Yun, Jei-Pil Wang
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J Korean Powder Metall Inst. 2013;20(1):60-67.
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DOI: https://doi.org/10.4150/KPMI.2013.20.1.060
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186
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Citations to this article as recorded by - A study on Zn recovery from other metals in the spent mixed batteries through a sequence of hydrometallurgical processes
Dong Ju Shin, Sung-Ho Joo, Chang-Hyun Oh, Jei-Pil Wang, Jin-Tae Park, Dong Joon Min, Shun Myung Shin
Environmental Technology.2019; 40(26): 3512. CrossRef - Development of Batch-Type Electric Furnace for Recovery of Valuable Materials from Spent Batteries
Shun Myung Shin, Dong Won Lee, Jung Yeul Yun, Byung Ho Jung, Jei Pil Wang
Applied Mechanics and Materials.2014; 607: 197. CrossRef
- Oxidation Study on the Fabrication of Fe-36Ni Oxide Powder from Its Scrap
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Jung Yeul Yun, Man Ho Park, Sangsun Yang, Dong-Won Lee, Jei-Pil Wang
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J Korean Powder Metall Inst. 2013;20(1):48-52.
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DOI: https://doi.org/10.4150/KPMI.2013.20.1.048
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- A study of oxidation kinetic of Fe-36Ni alloy has been investigated using thermogravimetric apparatus (TGA) in an attempt to define the basic mechanism over a range of temperature of 400 to 1000°C and finally to fabricate its powder. The oxidation rate was increased with increasing temperature and oxidation behavior of the alloy followed a parabolic rate law at elevated temperature. Temperature dependence of the reaction rate was determined with Arrhenius-type equation and activation energy was calculated to be 106.49 kJ/mol. Based on the kinetic data and micro-structure examination, oxidation mechanism was revealed that iron ions and electrons might migrate outward along grain boundaries and oxygen anion diffused inward through a spinel structure, (Ni,Fe)_3O_4.
- Extraction of Vanadium Powder by Metallothermic Reduction
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Dong-Won Lee, Sang-Hyun Heo, Jong-Taek Yeom, Jei-Pil Wang
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J Korean Powder Metall Inst. 2013;20(1):43-47.
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DOI: https://doi.org/10.4150/KPMI.2013.20.1.043
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130
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- The extraction of metallic pure vanadium powder from raw oxide has been tried by Mg-reduction. In first stage, V_2O_5 powders as initial raw material was reduced by hydrogen gas into V_2O_3 phase. V_2O_3 powder was reduced in next stage by magnesium gas at 1,073K for 24 hours. After reduction reaction, the MgO component mixed with reduced vanadium powder were dissolved and removed fully in 10% HCl solution for 5 hours at room temperature. The oxygen content and particle size of finally produced vanadium powders were 0.84 wt% and 1 µm, respectively
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Citations
Citations to this article as recorded by - Preparation of tantalum metal powder by magnesium gas reduction of tantalum pentoxide with different initial particle size
Seon-Min Hwang, Su-Jin Park, Jei-Pil Wang, Yong-Ho Park, Dong-Won Lee
International Journal of Refractory Metals and Hard Materials.2021; 100: 105620. CrossRef - Metallic Niobium Powder Reduced by Atmospheric Magnesium Gas with Niobium Pentoxide Powder
Su-Jin Park, Seon-Min Hwang, Jei-pil Wang, Young-Guk Son, Dong-Won Lee
MATERIALS TRANSACTIONS.2021; 62(1): 34. CrossRef - Fabrication of Metallic Tantalum Powder by Magnesium-gas Reduction of Tantalum Oxide
Dong-Won Lee
Journal of Korean Powder Metallurgy Institute.2018; 25(5): 390. CrossRef - Effect of magnesium on the phase equilibria in magnesio-thermic reduction of Nb2O5
Kyunsuk Choi, Hanshin Choi, Hyunwoong Na, Il Sohn
Materials Letters.2016; 183: 151. CrossRef
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