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A Study on the Supersonic Jet Nozzle to Improve of the Operating Efficiency of the Converter Process
전로 공정 조업 효율 향상을 위한 초음속 제트 노즐 연구
Jae-Hong Kwon, Ji-A Lee, Kyeng-Uk Lee, Jeong-Whan Han
권재홍, 이지아, 이경욱, 한정환
Korean J. Met. Mater. 2020;58(8):550-559.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.550

Abstract
Recently, various worldwide studies have been conducted to improve converter operation by modifying the lance nozzle. In this study, a numerical analysis of the lance nozzle was conducted to improve the dephosphorization efficiency, and to reduce blowing time. The lance nozzle was designed in the form of an abnormal expansion..... More

                        
The Study on the Manufacturing Cold Cured Briquette Using Curing Reaction of Sodium Silicate
규산 소다의 경화 반응을 이용한 상온 경화 괴성광 제조에 대한 연구
Kang-Min Kim, Jeong-Whan Han
김강민, 한정환
Korean J. Met. Mater. 2020;58(6):369-374.   Published online 2020 May 20
DOI: https://doi.org/10.3365/KJMM.2020.58.6.369

Abstract
New technologies need to be developed in the ironmaking process to reduce carbon dioxide emissions. To achieve this, in recent years steelmakers have been working to reduce coke usage by increasing thermal energy efficiency. However, it is very difficult to reduce coke consumption while maintaining production, because the level of..... More

                        
Corrosion Behavior of SiC and Si3N4 by Alkali Gas
알칼리 가스에 의한 SiC 및 Si3N4의 침식 거동
Ju-Hun Kim, Kang-Min Kim, Ji-A Lee, Jeong-il Kim, Jeong-Whan Han
김주훈, 김강민, 이지아, 김정일, 한정환
Korean J. Met. Mater. 2020;58(1):17-25.   Published online 2019 Dec 12
DOI: https://doi.org/10.3365/KJMM.2020.58.1.17

Abstract
Studies of effective furnace cooling technology and refractory materials have extended the lifetime of a blast furnace to more than 15 years. On the other hand, the replacement of refractories in the blast furnace results in considerable cost and time loss for stopping the blast furnace operation. Various kinds of..... More

                        
Charging Behavior of Sinter Feed according to Types of Charging Chute
장입 슈트 형태에 따른 소결 원료 장입 거동
Kang-Min Kim, Ki-Woo Lee, Jae-Hong Kwon, Hae-Kwon Jeong, Jeong-Whan Han
김강민, 이기우, 권재홍, 정해권, 한정환
Korean J. Met. Mater. 2017;55(12):896-904.   Published online 2017 Dec 4
DOI: https://doi.org/10.3365/KJMM.2017.55.12.896

Abstract
In the iron ore sintering process, a thermal imbalance can occur in the sinter feed bed which degrades the quality of the sintered ores. In order to solve this thermal imbalance, it is necessary to control the sizes of the sintering feed charging through the chute by designing an appropriate..... More

      
Effect of Overflow Geometry and Injection Speed on the Casting Product during the Magnesium Alloy Die-casting Process for Thin-walled Electronic Housing Components
마그네슘 합금 박육 부품 다이캐스팅 주조시 오버플로우 형상 및 주입속도가 주조 품질에 미치는 영향
Eui-Hyuk Kwon, Jaehong Kwon, Beyong-Chul Kim, Jeong-Whan Han
권의혁, 권재홍, 김병철, 한정환
Korean J. Met. Mater. 2017;55(7):515-522.   Published online 2017 Jul 4
DOI: https://doi.org/10.3365/KJMM.2017.55.7.515

Abstract
Casting defects such as gas traps and oxide particles must be removed in the die-casting process in order to obtain good cast products. Experimental research is costly and time-consuming, so computer simulations are typically performed in advance and then compared to experimental results. In this paper, a magnesium alloy die-casting..... More

      
Reduction Behaviors of Carbon Composite Iron Oxide Briquette Under Oxidation Atmosphere
산화성분위기에서의 탄재 내장 산화철 브리켓의 환원특성
Ki-Woo Lee, Kang-Min Kim, Jae-Hong Kwon, Sang-Han Son, Jeong-Whan Han
이기우, 김강민, 권재홍, 손상한, 한정환
Korean J. Met. Mater. 2017;55(1):24-30.   Published online 2017 Jan 5
DOI: https://doi.org/10.3365/KJMM.2017.55.1.24

Abstract
The carbon composite iron oxide briquette (CCB) is considered a potential solution to the upcoming use of low grade iron resources in the ironmaking process. CCB is able to reduce raw material cost by enabling the use of low grade powdered iron ores and coal. Additionally, the fast reduction of..... More

      
Effect of Basicity on the Reduction Behavior of Carbon Composite Iron Oxide Briquette
탄재내장 산화철 브리켓의 환원거동에 미치는 염기도 영향
Jae-Hong Kwon, Eui-Hyuk Kwon, Ki-Woo Lee, Kang-Min Kim, Ji-A Lee, Jeong-Whan Han
권재홍, 권의혁, 이기우, 김강민, 이지아, 한정환
Korean J. Met. Mater. 2016;54(11):846-854.   Published online 2016 Nov 5
DOI: https://doi.org/10.3365/KJMM.2016.54.11.846

Abstract
The world is gradually running short of high quality iron resources. This forces ironmaking processes to focus on the use of low quality iron ores. Carbon composite iron oxide briquettes (CCB) are one of the alternative choices. CCB enables the utilization of low quality powdered iron ores and coal, and..... More

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