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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
광액시료와 비-자성광액시료에 포함된 황비철석을 자류철석으로 상변환 시키기 위하여 그리고 비소 함량을 2,000 mg/kg 이하로 제거하기 위하여 마이크로웨이브 장치를 다양한 시간으로 가열하였고, 습식-자력선별하였다. 마이크로웨이브 가열시간이 증가함에 따라 황비철석 표면의 가장자리부터 자류철석으로 상변환이 일어났고, 열점 현상에 의하여 자류철석 내부에 용융공극과 마이크로-크랙들이 형성되었다. 마이크로웨이브 가열을 10분간 수행한 광액시료(비소 함량 : 14,732.66 mg/kg)와 비-자성 광액시료(비소 함량 : 19,970.13 mg/kg)를 습식-자력선별하여 자성광물로 분리시킨 결과, 10분 가열한 자성광물 시료에서 만 비소 함량이 2,000 mg/kg 이하로 나타났다. 따라서 향후 비소 페널티부과 대상인 복합황화광물을 마이크로웨이브 가열과 습식-자력선별을 효과적으로 활용하면, 비소 함량을 페널티 부과대상 이하의 광석광물을 얻을 수 있을 것으로 기대한다. 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.
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.
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
금정광에 함유된 금, 은 및 유용금속을 효과적으로 용해시키기 위해서 비가시성 금정광을 소성 및 소금소성처리하였다. 이들 소성처리 생성물에 대하여 왕수분해 결과 금, 은 및 유용금속 함량은 비가시성 장광에서보다 소성정광에서, 그리고 소성정광에서 보다 소금소성정광에서 더 많이 용해되었다. 금과 은이 최대로 용해되는 입도는 181 ~ 127 ㎛, 750℃의 소성온도, 그리고 20%의 소금첨가량에서였다. XRD 분석을 수행한 결과, 석영과 황철석은 750℃의 소성처리, 그리고 왕수분해에도 불구하고 분해되지 않았다. 황철석은 소금소성처리에 의하여 완전하게 분해되었지만 석영은 파괴되지 않았다. 따라서 석영에 함유된 금은 소금소성처리나 왕수분해를 수행해도 용해되지 않을 것으로 예상된다. 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.