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반도체(半導體) 제조공정(製造工程)에서 발생하는 혼산폐액(混酸廢液)으로부터 고순도(高純度) 인산회수(燐酸回收)
박성국,노유미,이상길,김주엽,신창훈,김준영,안재우,Park, Sung-Kook,Roh, Yu-Mi,Lee, Sang-Gil,Kim, Ju-Yup,Shin, Chang-Hoon,Kim, Jun-Young,Ahn, Jae-Woo 한국자원리싸이클링학회 2006 資源 리싸이클링 Vol.15 No.5
LCD와 반도체 제조공정에서 발생하는 인산, 질산, 초산, Al, Mo 등이 혼재하고 있는 인산계 혼산폐액을 액정제조공정에서 사용할 수 있는 고순도 에칭액으로 재활용하기 위해서 용매추출법, 진공증발법, 확산투석법 및 이온교환법의 각각의 기술적 특성을 살린 혼합 처리공정을 이용하여 고순도 인산회수 기술을 확립하고 상용화 시스템을 개발하고자 하였다. 시험 결과 진공증발에 의해 질산과 초산을 100% 제거할 수 있었고, TOP를 이용한 용매추출에서도 추출 4단, 탈거 6단으로 완벽하게 제거할 수 있었다. 이온교환의 전단계로 적용한 확산투석에서 Al 97.5%, Mo 36.7% 제거할 수 있었고 이온교환공정에서 Al 및 Mo를 각각 1ppm이하로 정제할 수 있었다. The waste solution discharged from the LCD manufacturing process contains acids like nitric, acetic and phosphoric acid and metal ions such as Al, Mo and other impurities. It is important to remove impurities less than 1 ppm in phosphoric acid to reuse as an etchant because the residual impurities even in sub-ppm concentration in semiconductor materials play a major role on the electronic properties. In this study, a mixed system of solvent extraction, diffusion dialysis and ion-exchange was developed to commercialize in an efficient system fur recovering the high-purity phosphoric acid. By vacuum evaporation, almost 99% of nitric and acetic acid was removed. And by solvent extraction method with tri-octyl phosphate (TOP) as an extractant, the removal of acetic and nitric acid from the acid mixture was achieved effectively at the ratio A/O=1/3 with 4th stage of extraction stage. About 97.5% of Al and 36.7% of Mo were removed by diffusion dialysis. Essentially almost complete removal of metal ions and purification of high-purity phosphoric acid could be obtained by using ion exchange.
PD제어 기법을 적용한 어뢰형 무인잠수정(HW200)의 선수각 및 심도제어기 설계와 실해역 성능 검증
박성국,이필엽,박상웅,권순태,정훈상,박민수,Park, Sung-kook,Lee, Phil-yeop,Park, Sangwoong,Kwon, Soon T.,Jung, Hunsang,Park, Min-su 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.10
This Paper considers the heading and depth control problem for an underactuated AUV (Autonomous Underwater Vehicle) HW200. The HW200 is a torpedo-type AUV that is developed from Hanwha corporation R&D Center for military operation such as MCM (Mine Counter Measures). The HW200 controls horizontal and vertical motion with two stern plane and two rudder plane. It is well known that fine control of an AUV motion is not easy because of model uncertainties, highly nonlinear and coupled motions. To overcome those kind of uncertainties, a number of control methods have been presented. In this paper, the motion controllers of the HW200 are designed using PD controller design method based on the linear and perturbed model of the typical 6-DOF equations of an AUV, and confirmed the effectiveness of the controller through simulations and field test.
박성국,전희동 ( Sung Kook Park,Hee Dong Chun ) 한국공업화학회 1995 공업화학 Vol.6 No.5
제철공정에서 발생되는 산화철, 폐산, 폐아연양극, Scrap 등의 폐기물을 이용하여 전기도금원액으로 사용되는 염화제일철 수용액을 제조하는 공정을 개발하였다. 이 공정은 다음과 같은 3단계로 이루어진다. 1) 주 원료인 산화철과 폐산에 함유되어 있는 Cr, Al, Mn, Ni, Na, Mg, K 등의 불순물 제거 및 산화철 용해공정, 2) 염화제이철 수용액의 염화제일철 수용액으로의 환원공정, 그리고 3) 제조한 염화제일철 수용액의 품질평가. 원료로 사용한 산화철 중에 함유된 불순물을 감소시키기 위해서는 각 불순물과 산화철의 염산용액에서의 용해속도 차이를 이용하였다. 불순물을 제거한 산화철을 용해시켜 얻은 염화제이철 수용액을 도금용액으로 사용할 수 있는 염화제일철 수용액으로 환원시키기 위하여 본 연구에서는 Steel chip, 폐아연 양극 등을 사용하였다. 본 연구를 통하여 제조한 염화제일철 용액을 사용하여 전기도금을 행하고 도금특성을 평가한 결과, 도금층의 Fe 함량, 조직의 치밀도, 표면조도, 광택도, 백색도 등이 현재 국내 도금공장에서 시판되는 도금용액을 사용하여 제조한 것과 유사한 것으로 나타났다. A recycling process of metallic wastes from a steel plant such as iron oxide, waste acid, spent zinc anode, scrap to ferrous chloride electroplating solution was developed. The process consists of three steps : 1) minimization of impurities contained in wastes 2) reduction of ferric chloride to ferrous chloride with metallic reducing agent and 3) properties evaluation of recycled ferrous chloride solution. In order to decrease the content of impurities such as Cr, Al, Mn, Ni, Mg, Na and K in iron oxide which is the main waste used in this study, dissolution and precipitation steps were used. Ferric chloride solution formed by the dissolution of iron oxide must be reduced to ferrous chloride which can be used as electroplating solution. In this study, the characteristics of reduction process with steel chips and waste zinc anode were examined. Property evaluation of manufactured ferrous chloride solution through quality test of electroplated layer was conducted. Fe content, microstructure, surface roughness, brightness and whiteness of electroplated layers were similar to those by commercial ferrous chloride electroplating solution.
제3궤조 전차선의 신축장치(Expansion Joint)작용에 관한 고찰
박성국(Sung-Kook Park),장영환(Yeong-Hwan Jang),안천헌(Cheon-Heon An),김충수(Chung-Soo Kim) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10
제3궤조 전차선 급전레일은 주위온도와 전류로 인하여 발생하는 열 때문에 길이 방향으로 신축변화하며, 그로 인한 각각의 급전레일들 사이에 기계적, 전기적 문제가 발생하지 않도록 하기 위하여 길이 변화를 수용할 수 있는 신축장치(Expansion Joint)를 사용한다.최근 신설되는 경량전철은 제3궤조 전차선 급전방식을 주로 적용하고 있으나, 급전레일온도에 따른 관리 및 유지보수기준이 명확하게 제시되지 않고 있다. 또한, 영업운전으로 인한 급전레일 급전중에는 신축장치의 상태변화를 확인할 수 있는 시스템이 구축되어 있지 않으므로, 검측을 통하여 측정된 데이터를 분석하여 최악의 환경에서도 장비성능을 유지하며 운용되는지 검증할 필요가 있다. 본 논문에서는 제3궤조 전차선의 운용경험을 토대로 급전레일의 온도변화에 따른 신축변화를 조사·분석하였다. 그 일련의 과정들을 통해 신축장치의 신축량 조사·분석 방법과 분석결과에 따른 신축장치의 유지보수기준 적용 방법을 제시하고자 한다. The third rail of conductor rail occur the rail expansion and contraction to length direction by surrounding temperature and electric current produced heat. In order to avoid both mechanical and electronic problem between each of the conductor rail, expansion joint normally is used to accommodate the change of the length. Lately, the newly created light rail transit is mainly applied the third rail of conductor rail with method of electric supply, the standards which include management and maintenance according to temperature change of conductor rail is not presented clearly yet. Besides, during the supply of power that conductor rail by business driving, the system which Inspect variable of expansion joint is not constructed. Therefore, it should be examining status of expansion joint even in the worst of circumstances maintaining and working capabilities instruments through analyzing measurements data. In this thesis examined and analyzed the rail expansion and contraction based on the management experience about the third rail of conductor rail. We kindly suggest the method of investigation and analysis that amount of expansion about expansion joint. And also, the standard application method of administration and maintenance of expansion joint in accordance with analytical researches through a series of those process as well.
PD제어 기법을 적용한 어뢰형 무인잠수정(HW200)의 선수각 및 심도제어기 설계와 실해역 성능 검증
박성국(Sung-kook Park),이필엽(Phil-yeop Lee),박상웅(Sangwoong Park),권순태(Soon T. Kwon),정훈상(Hunsang Jung),박민수(Min-su Park) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.18 No.12
This Paper considers the heading and depth control problem for an underactuated AUV (Autonomous Underwater Vehicle) HW200. The HW200 is a torpedo-type AUV that is developed from Hanwha corporation R&D Center for military operation such as MCM (Mine Counter Measures). The HW200 controls horizontal and vertical motion with two stern plane and two rudder plane. It is well known that fine control of an AUV motion is not easy because of model uncertainties, highly nonlinear and coupled motions. To overcome those kind of uncertainties, a number of control methods have been presented. In this paper, the motion controllers of the HW200 are designed using PD controller design method based on the linear and perturbed model of the typical 6-DOF equations of an AUV, and confirmed the effectiveness of the controller through simulations and field test.