• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.11
• /
• pp.263-281
• /
• 2017

Global optimization that considers the processes at integrated steel mills is more important than the local optimization to improve the efficiency of a single process. Research utilizing mathematical models at integrated steel mills predominantly focus on solving problems solely for a specific process or focusing on what techniques are applied to. However, it is important to define the problems that must be solved at the steelworks, identify the objectives and constraints that can be modeled, and selection of methodologies that can be applied to the problems. The purpose of this study is to investigate the problems in improving efficiency at integrated steel mills from the viewpoint of production & operations management. We review the research have been conducted in order to solve those problems. We classified the research into 6 categories and suggested future research direction based on the global optimization. It is expected that research themes for improving the efficiency at integrated steel mills will be derived.

• Journal of the Korean Society for Precision Engineering
• /
• v.13 no.5
• /
• pp.84-94
• /
• 1996

In order to prevent shell sticking by providing sufficient lubrication between the strand and the mold, the mold oscillation has been used. Now it is well known that the shape of the oscillation curve has a decisive effect on the surface quality of the cast product. Besides, oscillation parameters such as stroke and frequency are also very important. In order to guarantee that parameters which have been found to be optimal for a certain grade of steel do not change with time, periodical checks of the physical condition of the whole equipment are necessary. The portable mold oscillation analyzer with integrated computer, developed by POSCO, records the movement of the mold in every spatial direction. The system uses the gap sensors to measure the mold movement (displacement ) in the two horizontal directions according to the mold narrow and broad faces and the vertical strokes in the four corners of mold. The gap sensor is a non-contacting minute displacement measuring device using the principle of high frequency eddy current loss. The mold oscillation diagnosis system integrates the gap sensors, their converters and the industrial portable computer with plug-in data acquisition boards. The all programs, such as the fast Fourier transformation module (amplitude and phase spectrums) and harmonic analysis module, was coded by LabVIEW$^{TM}$ software as the graphical language. In an own 'expert module' which is included in the diagnosis program, one can obtain much information about the mold oscillation equipment.

• 주택과사람들
• /
• no.56 s.73
• /
• pp.159-163
• /
• 1996

한국철강협회(회장 김만제) 스틸하우스 클럽은 5월 29일 포스코센터 서과 4층 아트홀에서 철강소재, 설계 $\cdot$시공업체, 철강가공, 주택업계, 정부유관기관 관계자 500여명이 참석한 가운데 포항제철과 한국주택협회, 한국철강신문 후원으로 철강재주택 선진 기술개발 동향에 대한 국제세미나를 개최했다.

• Resources Recycling
• /
• v.3 no.3
• /
• pp.12-20
• /
• 1994

Difficulties lies on using the dust from iron making process as a raw material for sintering process mainly because of high amount of Zn or alkali content and its ultra fine characteristics. To eliminate these toxic influence, new fluxing materials were tested and could get a very successful results. This fluxing materials, Calcium-ferrite of magnesio-ferrite were made from various waste materials such as lime stone sludge, bag filter dust, waste EP dust and dolomite sludge by simple way of pre-sintering. Sintering behavior as a fluxing materials was revealed to be good in any aspects and new concept of total recycling system could be established.

• The Safety technology
• /
• no.183
• /
• pp.24-26
• /
• 2013

(주)화인은 전남 광양 포스코 제철소 내에서 크레인, 굴삭기, 휠로더, 무인로더 및 각종 설비를 이용하여 Slag를 처리하고 있는 전문 외주사로, 대한산업안전협회 전남지회가 안전우수사업장으로 적극 추천할 정도로 안전에 대해서는 큰 모범을 보이고 있는 회사다. 이곳은 업종 특성상 폭발, 화재 위험이 매우 크다. 하지만 113명의 임직원 모두가 안전을 최우선으로 하면서 설립(2010년 7월 1일) 이후부터 무사고를 기록, 지난해 10월 안전보건공단으로부터 무재해 2배수를 인정받았다. 이러한 안전에 대한 성과는 작업 능률로 그대로 이어지면서 이곳은 지난 2011년 포스코의 우수 외주 파트너사로 선정되기도 했다. 안전뿐만 아니라 보건 측면에서도 매우 큰 성과를 냈다. 전사적으로 금연 프로그램을 적극적으로 시행하여, 지난해 전남 광양시로부터 '담배 연기 없는 기업'을 수상한 것이다. 위험천만한 제철소 환경 속에서 확고한 안전보건 문화를 구축, 지역사업장의 모범이 되고 있는 (주)화인의 안전관리 활동을 살펴봤다.

• JOURNAL OF ELECTRICAL WORLD
• /
• no.5 s.89
• /
• pp.76-84
• /
• 1984

마이크로 프로세서가 1971년에 발명된 이래, 산업이 모든 분야에서 디지털 제품이 실용에 공여되고 있으나, 전동기 구동 시스템의 전디지털화는 실용화가 늦어져 겨우 1981년께부터 실용에 쓰이게 되었다. 여기서는 제철소에 있어서의 전동기의 가변속 구동 시스템에 대해서 그 변천, 기술적진보 전디지털화의 현장등에 대해 기술한다.

• NEWSLETTER 전기공업
• /
• no.91-28 s.41
• /
• pp.1-17
• /
• 1991

• ICROS
• /
• v.15 no.1
• /
• pp.37-43
• /
• 2009

철강제조공정에서 강판을 만드는 공정이 압연이다. 압연공정은 연속주조 공장에서 생산되는 Steel Slab, Bloom, Billet등의 반제품을 높은 온도로 재 가열하고 물리적인 힘을 가해 압연하는 열간압연(이하 열연)과 열연으로 얇아진 강판을 열을 가하지 않고 냉각상태에서 압연하는 냉간압연으로 나뉜다. 본 원고에서는 열연 공정의 가열로 온도제어에 적용한 MFA(Model Free Adaptive Controller)를 소개하고자 한다.

• The Magazine for Energy Service Companies
• /
• s.42
• /
• pp.28-29
• /
• 2006

20여 년간 철강설비 및 산업설비 전문회사로서 입지를 공고히 해 온, 포스코 100% 출자회사인 포철기연이 그동안 축적된 엔지니어링 능력과 철강소재를 다룬 기술력을 바탕으로 ESCO사업에 진출했다. 포철기연은 단.중.장기 프로젝트를 통해 광양제철소와 인근 공장에 에너지절약 설비를 채용하고 이를 위해 현장 적용력이 확실한 진단기법을 개발하고 장기적으로 저급 폐열 회수기술 등을 개발, 기술과 시스템 중심의 ESCO시장 장악력을 높여갈 계획이다.

• Journal of Science and Technology Studies
• /
• v.10 no.2
• /
• pp.37-76
• /
• 2010

Park Tae-Joon, a pioneer in the Korean steel industry, has greatly influenced the advancement of science and technology as well as the development of the nation's economy. He believed that POSCO, which was a government-owned company, should not only focus on making profits, but also operate for higher state-level purposes. This belief became the basis for founding a general laboratory and a research university, as well as building big science and technology R&D facilities. Park Tae-Joon's efforts to establish a research university and his dedication to the advancement of science education stemmed from his devotion to public welfare. Just like he believed that the steel industry, which is the basis for all other industries, should be promoted at the state-level, he believed that university and basic science should also be promoted at the state-level. Thanks to his philosophy, the Pohang University of Science and Technology has risen beyond just a polytechnic school to become a research university that makes revolutionary science and technology advancements for the nation. The fact that Park Tae-Joon used profits from business to build the university and national research facilities such as the Pohang Light Source also shows that he nurtured pure science with the welfare of the whole nation in mind.