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A Study on the Treatment and Recovery of Sodium Sulfate (Na<sub>2</sub>SO<sub>4</sub>) Generated When Recovering Valuable Metals (Ni, Co, Mn, Li) from Waste Lithium Ion Batteries(LIBs)
폐리튬배터리(LIBs)에서 유가금속(Ni, Co, Mn, Li) 회수 시 발생하는 황산나트륨의 처리 및 회수 연구
Yeonchul Cho, Minhyuk Seo, Youngjae Lee, Jaewoo Ahn
조연철, 서민혁, 이영재, 안재우
Korean J. Met. Mater. 2024;62(4):275-283.   Published online 2024 Mar 29
DOI: https://doi.org/10.3365/KJMM.2024.62.4.275

Concerns have arisen regarding the high concentrations of sodium sulfate in wastewater resulting from the waste Li-ion battery wet recycling process. In addressing this issue, Bipolar electrodialysis was employed to desalinate high-concentration sodium sulfate and recover it as sulfuric acid and sodium hydroxide. The investigation encompassed various experimental variables, such..... More

Lithium Recovery from NCM Lithium Ion Battery by Carbonation Roasting Followed by Water Leaching
NCM계 리튬이온 전지 양극재의 탄산화 배소와 수침출 의한 Li 회수
Dae-Hyeon Lee, So-Yeon Lee, So-Yeong Lee, Ho-Sang Sohn
이대현, 이소연, 이소영, 손호상
Korean J. Met. Mater. 2022;60(10):744-750.   Published online 2022 Sep 29
DOI: https://doi.org/10.3365/KJMM.2022.60.10.744

Lithium is a representative rare metal and ranks 32nd in abundance among elements in the earth’s crust. Lithium is used in a variety of applications, including the production of organolithium compounds, as an alloying addition to aluminum and magnesium, and as the anode in rechargeable lithium ion batteries especially for..... More

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Comparison of Phase Evolution and Sintering Properties of Ti-10Mo Alloys Prepared using Bulk Scrap and Blended Elemental (BE) Powder
In-Hyeok Choi, Jung-Min Oh, Daeyoung Kim, Jong-Woong Kim, Hanjung Kwon
Korean J. Met. Mater. 2022;60(3):180-187.   Published online 2022 Feb 8
DOI: https://doi.org/10.3365/KJMM.2022.60.3.180

In this study, Ti-10Mo alloy powder and sintered bodies were successfully fabricated using a threestep process of acid/organic solvent cleaning, hydrogenation/dehydrogenation (HDH) of bulk Ti-Mo scrap, and pressureless vacuum sintering of the alloy powder. This process can be used to recycle valuable Ti alloy. And unlike remelting-based recycling processes, in..... More

                   Web of Science 3  Crossref 3
Sintering Behavior and Hardness of Tungsten Prepared by Hard Metal Sludge Recycling Process without Ammonium Paratungstate
텅스텐산암모늄 단계 생략 초경합금 슬러지 재활용 공정에 의해 제조된 텅스텐의 소결 및 경도 특성
Hanjung Kwon, Jung-Min Shin
권한중, 신정민
Korean J. Met. Mater. 2022;60(1):53-61.   Published online 2021 Dec 10
DOI: https://doi.org/10.3365/KJMM.2022.60.1.53

In this paper, we suggest a novel recycling process for hard metal sludge that does not use ammonium paratungstate. Ammonia, which in the conventional recycling process is essential for removing sodium and crystallized tungstate, was not used in the novel process. Instead of ammonia, acid was used to remove the..... More

                   Web of Science 1  Crossref 3
Dispersion Behavior of Blast Furnace Sludge for Valuable Metal Recovery
유가금속 회수를 위한 고로 슬러지의 분산 거동
Jae-Heon Jung, So-Yeong Lee, Joo Choi, Ho-Sang Sohn
정재헌, 이소영, 최 주, 손호상
Korean J. Met. Mater. 2021;59(5):295-303.   Published online 2021 Apr 6
DOI: https://doi.org/10.3365/KJMM.2021.59.5.295

Blast furnace sludge, which comes from the iron making process, contains many valuable materials including iron, carbon, and zinc, etc. Because a cohesive agent is added during filtration, fine sludge particles are agglomerated together. Therefore, This makes it necessary to disperse the sludge in solution before separating or recovering valuable..... More

                   Web of Science 2  Crossref 2
Effect of Ultrasonic Cleaning of Titanium Turning Scraps Immersed in Alkaline Solution and Subsequent Preparation of Ferrotitanium Ingots
Suhwan Yoo, Jikwang Chae, Jung-Min Oh, Jae-Won Lim
Korean J. Met. Mater. ;59(2):113-120.   Published online 2021 Jan 27
DOI: https://doi.org/10.3365/KJMM.2021.59.2.113

Ti has excellent properties but is more expensive than other materials due to its high melting point, high reactivity and difficult processability. One way to lower the production cost of Ti products is to recycle Ti scraps. Before recycling Ti scraps, pretreatment to remove contamination is essential. Ti scraps can..... More

                   Web of Science 2  Crossref 3
Recovery of Cadmium in Nickel-Cadmium Leaching Solution by Sulfide Precipitation Method
폐니켈-카드뮴 침출용액으로부터 황화물 침전법을 이용한 카드뮴 회수에 대한 연구
Il-Jeong Park, Dae-Weon Kim, Min-Jun Kim, Hang-Chul Jeong
박일정, 김대원, 김민준, 정항철
Korean J. Met. Mater. 2019;57(11):726-731.   Published online 2019 Nov 5
DOI: https://doi.org/10.3365/KJMM.2019.57.11.726

A large amount of waste nickel-cadmium batteries are being produced, and various studies have been conducted to recover the valuable metals contained in the batteries. Solvent extraction is mainly used to recover nickel and cadmium, but that method has economic and environmental problems. In this study, to solve these problems,..... More

                   Web of Science 1  Crossref 1
Formation and Characterization of Mg-Cu-Gd-Nd Bulk Metallic Glass Using NdFeB Magnet Scrap
NdFeB 자석 스크랩을 이용한 Mg-Cu-Gd-Nd 비정질 합금의 제조 및 특성
Duck Hwan Yoon, Hong Min, Hong Jun Chae, Jin Kyu Lee
윤덕환, 민홍, 채홍준, 이진규
Korean J. Met. Mater. 2019;57(10):617-623.   Published online 2019 Sep 6
DOI: https://doi.org/10.3365/KJMM.2019.57.10.617

In the present study, new Mg-based bulk metallic glasses have been developed in a Mg-Cu-GdNd based system using a Mg-Nd byproduct obtained from the recycling process of NdFeB magnet scrap through liquid metal extraction. The Mg-Cu-Gd-Nd bulk metallic glasses with a diameter of 2 mm are fabricated by injection casting..... More

Eco-Friendly Pretreatment of Titanium Turning Scraps and Subsequent Preparation of Ferro-Titanium Ingots
Jikwang Chae, Jung-Min Oh, Suhwan Yoo, Jae-Won Lim
Korean J. Met. Mater. 2019;57(9):569-574.   Published online 2019 Aug 21
DOI: https://doi.org/10.3365/KJMM.2019.57.9.569

In this study, an eco-friendly pretreatment process was developed to recycle titanium turning scraps and ferro-titanium ingots with low gaseous impurities were prepared using recycled titanium turning scraps. The amount of gaseous impurities of titanium scraps before removing the machining oils on the surface was as high as 20000 ppm...... More

                   Web of Science 6  Crossref 5
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