• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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• pp.581-589
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• 2003

The variable flotation response ores from different deposits results basically from mineralogical association and their differences. Development of new techniques for analyzing the metallurgical performance of flotation and other concentration processes is demanded even in the treatment of rather simple ores such as porphyry ores. Diagnostic metallurgical analysis can be used to quantify the most possible recovery processes. Several porphyry copper/gold ores around the world were used to examine the responses in flotation, gravity separation and cyanidation in order to define the linkage between the recovery processes for both copper and old values. Laboratory batch flotation, gravity separation and cyanidation tests were carried out on these samples. All results were used to correlate the relative recovery of copper and gold, and to predict the highest possible metal recovery in the system. The metallurgical predictions were made according to the flotation conditions used and gravity separation. The results of various concentration processes on each porphyry ore samples are presented and discussed. All seven samples have shown significantly different gold/copper metallurgy. The grade/recovery relationships of gold and copper in the laboratory batch tests for the best results and the plants are given in the Figures below. The results of laboratory tests show that the copper recoveries converged to about $90\%$, but the gold recoveries were spread over $55-80\%$, except the K S ore. Series of standard cyanidation tests on the flotation concentrate samples and gravity separation using Knelson Separator on heads ores were carried out to cross-link the metallurgy and mineralogy of gold in the porphyry ores.

• 한국재료학회지
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• 제18권12호
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• pp.650-654
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• 2008

The emission of carbon dioxide from the burning of fossil fuels has been identified as a major contributor to green house emissions and subsequent global warming and climate changes. For these reasons, it is necessary to separate and recover $CO_2$ gas. A new process based on gas hydrate crystallization is proposed for the $CO_2$ separation/recovery of the gas mixture. In this study, gas hydrate from $CO_2/H_2$ gas mixtures was formed in a semi-batch stirred vessel at a constant pressure and temperature. This mixture is of interest to $CO_2$ separation and recovery in Integrated Coal Gasification (IGCC) plants. The impact of tetrahydrofuran (THF) on hydrate formation from the $CO_2/H_2$ was observed. The addition of THF not only reduced the equilibrium formation conditions significantly but also helped ease the formation of hydrates. This study illustrates the concept and provides the basic operations of the separation/recovery of $CO_2$ (pre-combustion capture) from a fuel gas ($CO_2/H_2$) mixture.

• 한국항행학회논문지
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• 제16권2호
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• pp.197-203
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• 2012

본 논문에서는 자율형 운항 알고리즘을 활용하여 분리보증 해결과 충돌탐지거리와의 상관관계, 충돌회피 후 경로점 복귀와 시간제약 조건에 따른 항로 복귀, 3대 이상의 다중 충돌회피 상황의 분리보증 실험을 수행하여 운항환경에서 발생하는 실증적인 문제를 규명하였다. 실험결과 자유비행 충돌회피를 위하여 탐지거리 확대가 분리보증 해결과 운항 효율성 향상에 유리하며, 충돌회피 후 복귀기동 시 충돌예측상황에 따라 고정 경로점 복귀 또는 시간제약 조건을 적용한 항로 복귀기동을 선택할 수 있었다. 그리고 다중 충돌 상황에서 2도 이상의 선회각을 적용하면 분리보증 해결되었고, 최적의 선회각 선택 시에는 운항 효율성을 대폭 향상시킬 수 있었다.

• 한국안전학회지
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• 제13권2호
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• pp.39-44
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• 1998

An experimental study on oil absorbent was conducted to investigate the feasibility of utilizing absorbents in oil separation from water-oil mixture for spilt oil recovery. Experiments included investigations of absorptivity and filtering performance of a commercial oil absorbent for different diesel oil concentrations. The measured average absorptivity of the absorbent was above 92% for oil concentrations, 5, 10, 15vo1%, that shows good absorbing performance. Filtering the oil-water mixture, however, was too slow to be used for oil separation. An absorbent baffle system was suggested for oil separation which collects oil panicles by increasing contact between the absorbent and oil particles.

• 한국환경보건학회지
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• 제10권1호
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• pp.87-92
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• 1984

Extraction method of ginseng saponin by Extrelut column was studied as compared with that by phase separation. The results obtained were as follows: 1. Extraction time consumed by Extrelut column was 2 ~ 3 hours and much shorter as compared with that by phase separation. 2. Recovery rates Of ginsenoside by Extrelut column method were 97.8 ~ 106.1% and much higher as compared with those by phase separation method.

• Korean Chemical Engineering Research
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• 제43권2호
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• pp.266-271
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• 2005

혼합유기산으로부터 숙신산의 분리를 단극 분리막을 사용한 탈염전기투석장치를 이용하여 행하였다. 전류효율, 회수율, 에너지소요량, 분리비 등의 변화를 pH 값과 초기농도비에 따라 측정하였다. 숙신산의 분리는 숙신산과 아세트산의 이온화율, 분자량, 이온전도도, 전자가 크기 그리고 초기농도비 등으로 해석될 수 있었다.

• 멤브레인
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• 제8권2호
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• pp.69-76
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• 1998

막분리기술은 다른 분리기술에 비해 에너지절약형이며 또 비교적 대량으로 분리를 수행할 수 있다는 장점이 있어 근래 산업 현장에서 많이 이용되고 있다. 특히 mass separating agent를 사용하지 않고, 상변화를 수반하지 않는 순조건에서 실시할 수 있다는 특성으로 인하여 생물물질의 생산 및 회수에 있어서 막분리의 사용이 크게 증가하고 있다. 근래에 들어 막의 재지라 분리 module의 개발 등에 의해 fouling, 농도분극현상 등, 막분리의 근본적 문제점들이 많이 해결되고 있을 뿐 아니라, 기존의 조분리의 영역을 넘어서 정밀분리에로의 발전이 가시화되고 있다. 또한 생물분리기술의 추세인 복합분리와 동시분리의 측면에 있어서도 막분리의 응용성은 우수하여, 향후 생물공학 제품의 생산에 있어 막분리 기술의 역할은 막대할 것으로 사료된다.

• 한국막학회:학술대회논문집
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• 한국막학회 1999년도 The 7th Summer Workshop of the Membrane Society of Korea
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• pp.108-110
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• 1999

• Journal of Biosystems Engineering
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• 제5권1호
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• pp.43-50
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• 1980

The milling plants in Korea have been generally used the paddy-separator that operated in accordance with the principle of sieving action. This type of paddy separator was considered as inefficient, especially in relation to the new high-yielding varieties which have different size characteristics within their varieties and also as compared to traditional varieties. With the installation of modern paddy separator it may be possible to increase the overall milling system efficiency and to reduce the grain loss. This study was intended to identify and define important parameters required for assessing the separation performance of a tray-type paddy separator and to determine the optimum conditions of the inclination of separator-table. The results of the study were summarized as follows : (1) Separation performance can be given by use of many parameters found from the measurement of separator outputs. such as upper-tail recovery $(\varepsilon)$, purity of upper-tail $(\gamma)$ , separation recovery of brown rice $(\alpha)$, separation recovery paddy $(\beta)$, and efficiency of separator $(\epsilon)$, Among these para-meters , $\varepsilon$, $\gamma$, $\alpha$ and $\beta$, were designated , respectively, their independent properties of the paddy separator. In addition, their modes of variation due to a varied inclination of the separation table did not indicated in the same direction . However, the efficiency of separator had an advantage to indicate the overall characteristics of the separator performance with a clear optimum inclination condition of the separator table. (2) The optimum feed rate and maximum efficiency of the separator did not occur at the identical inclination of the separator table. Thus, for its practical operation it is necessary to compromise between the qualitative and quantitative performances of the separator. (3) The optimum setting of the separator table tested in the study showed to occur at its inclination of approximately $26^\circ<$/TEX> for the front and $8^\circ<$/TEX> for lateral.

• 대한환경공학회지
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• 제36권2호
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• pp.147-152
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• 2014

본 연구에서는 폴리설폰 중공사막을 이용하여 화석연료 연소에서 배출되는 온실가스 중 $CO_2$의 회수에 관한 연구를 실시하였다. 고농도의 $CO_2$를 회수하기 위한 막분리 공정에 대한 선행연구이다. 혼합가스 분리거동 관찰을 위하여 이산화탄소가 10% 함유된 배기가스를 사용하였다. 압력, 온도, 주입가스 조성, 다단 막 변화를 주어 스테이지 컷에 따른 분리 성능을 조사하였다. 압력과 온도가 증가 할수록 투과측에 $CO_2$ 농도와 회수율이 증가하였다. 주입 가스 조성 변화 시 $CO_2$의 함량이 높을 경우 회수율 및 분리 효율이 높아졌다. 3단 분리막 시스템을 이용시 $CO_2$ 농도 95% 이상, 회수율 90% 이상 보였으며 1단 분리막 보다 분리율이 향상되었다.