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마이크로웨이브 가열에 의한 황비철석의 열분해와 습식-자력선별에 의한 비소 제거 효과
온현성,김현수,명은지,임대학,박천영,On, Hyun-Sung,Kim, Hyun-Soo,Myung, Eun-Ji,Lim, Dae-Hack,Park, Cheon-Young 한국광물학회 2017 광물과 암석 (J.Miner.Soc.Korea) Vol.30 No.3
In order to transform arsenopyrite into pyrrhotite and to decrease As content by less than 2,000 mg/kg, pulp sample and non-magnetic pulp sample were heated in a microwave oven at different heating times and were separated through wet-magnetic separation. As the microwave heating time increased, the phase of pyrrhotite was extended to become arsenopyrite entirely. The melting pores and micro-cracks occurred on the pyrrhotite due to hot spot phenomenon with microwave heating. The heated raw pulp sample (As content : 19,970.13 mg/kg) and non-magnetic pulp sample (As content : 19,970.13 mg/kg) which were heated in a microwave oven for 10 minutes were separated through wet-magnetic separation and magnetic fraction containing less than 2,000 mg/kg of As content was recovered only from the heated sample of magnetic separation. It was discovered that for the sulfide complex ore with As penalty imposed on, if microwave heating and wet-magnetic separation are effectively utilized, magnetic fraction. We expect to be able to obtain ore minerals with an arsenic content below the penalty charge.
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마이크로웨이브-질산용출과 납-시금법을 이용한 금산정광으로부터 금 회수
이종주,온현성,박천영 한국광물학회 2019 광물과 암석 (J.Miner.Soc.Korea) Vol.32 No.2
본 연구 목적은 비-가시성 금 형태로 산출되는 황화광물 정광을 마이크로웨이브-질산용출하여 황 화광물을 효과적으로 용해시키고자 하였고, 고체-잔류물을 납-시금법을 적용하여 금을 회수하고자 하 였다. 따라서 질산농도, 용출시간 그리고 시료 첨가량 효과에 대하여 마이크로웨이브-용출실험을 각각 수행하였다. 고체-잔류물의 무게 감소율은 질산농도가 증가할수록 그리고 용출시간이 증가할수록 증가 하였지만 시료 첨가량이 증가하면 무게 감소율이 감소하였다. 마이크로웨이브-질산용출을 수행한 결과 질산농도 6 M에서, 마이크로웨이브 용출시간 18분에서 황철석이 완전히 사라진 것을 XRD 분석에서 확인하였다. 고체-잔류물에 대하여 납-시금법을 수행한 결과, 질산농도가 증가할수록 그리고 용출시간 이 증가할수록 함량이 증가된 금 입자들을 회수하였다. 반면에 시료 첨가량이 증가할수록 금 함량이 감 소하는 입자들을 회수하였다.
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생물동역학 인자를 이용한 해양심층수기반 친환경 저비용 Spirulina platensis 배지 적용 가능성
임대학 ( Dae-hack Lim ),온현성 ( Hyun-sung On ),김현수 ( Hyun-soo Kim ),명은지 ( Eun-ji Myung ),이성재 ( Sung-jae Lee ),박천영 ( Cheon-young Park ) 조선대학교 공학기술연구원 2017 공학기술논문지 Vol.10 No.3
The aim of this study was to investigate the application of Deep See Water(DSW) in S. platensis cultivation through the growth experiments, bio-kinetics factors(maximum specific growth rate, doubling time and yield) and production cost. Growth experiments was performed with S. platensis under various culture medium conditions (deep sea water + low cost medium). Growth tests for culture medium demonstrated that the deep sea water to low cost medium ratio of 25:75(W/W) was effective in S. platensis with the maximum biomass of 0.88 g/L and minimum medium making cost per production mass of 8.17 KRW/g. The parameter estimation of bio-kinetics (maximum growth rate and yield) for low cost medium results showed that the maximum growth rate, doubling time and yield of N, P, K was obtained under deep sea water to low cost medium ratio of 25:75(W/W) of 0.099 1/day, 3.007 day and 0.170, 0.029, 0.033, respectively.
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비가시성 금정광의 효율적 용해를 위한 소성전처리 적용과 분해 잔유물에 대한 광물학적 해석
김봉주 ( Bong Ju Kim ),조강희 ( Kang Hee Cho ),오스지 ( Su Ji Oh ),온현성 ( Hyun Sung On ),김병주 ( Byung Joo Kim ),최낙철 ( Nag Choul Choi ),박천영 ( Cheon Young Park ) 한국광물학회 2013 광물과 암석 (J.Miner.Soc.Korea) Vol.26 No.1
In order to dissolve Au, Ag, and other valuable metals from gold ore concentrate, raw gold concentrate was pre-treated by roasting and salt-roasting at 750℃. The roasted concentrate was treated with aqua regia digestion to dissolve the valuable metals and higher amount of Au, Ag, and valuable metals were extracted from the roasted concentrates than from the raw concentrate. Higher amount of these metals were also extracted from the salt-roasted concentrate than from the roasted concentrate. The results of the gold dissolution experiments showed that the gold dissolution was most efficient when particle size, roasting temperature, and the percentage of added salt in salt roasting were about 181~127 ㎛, 750℃, and was 20.0%, respectively. The XRD analysis suggests that quartz and pyrite were not destroyed even through roasting at 750℃ and decomposition with aqua regia. However, through salt roasting, pyrite was completely decomposed, whereas quartz could not be destroyed through salt-roasting at 750℃ and aqua regia digestion. Accordingly, it was expected that the gold contained in quartz can not be dissolves through salt-roasting and treatment with aqua regia.
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