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김동진,오재현,고인용 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.5
A study on the leaching of stibnite was carried out in acidified ferric chloride solution at temperature ranging from 30℃ to 90℃. Possible leaching mechanism for the reaction was discussed with the experimental kinetic data obtained in this investigation. To evaluate the rate equation satisfying the data of the reaction, various kinetic models were discussed. The results obtained in this work are as follows; 1) The leaching rate of stibnite was enhanced by increasing the temperature and the concentration of solvent, and by making the particle size smaller. 2) In case of fine particle finer than 270 mesh, the leaching reaction is controlled by the diffusion of reactant (Fe(III)) through sulfur layer. The leaching reaction of coarse particle coarser than 270 mesh is controlled by chemical reaction in early stage and shift to diffusion controlled reaction according as the reaction progresses. 3) The apparent activation energy for pore diffusion reaction is 17 ㎉/㏖. 4) The initial leaching rate of 270/325 mesh stibnite can be expressed by the following empirical equation, d[Sb(III)]/dt = k ·[Fe(III)]^0.3 ·[HCl]^0.6
릴레이탐방 - 광주시 브랜드 '자연채'로 농가소득 향상 - 광주시청 농정과 축정팀 -
김동진,Kim, Dong-Jin 대한양계협회 2009 월간 양계 Vol.41 No.9
본 고는 양계산업 발전을 위해 각 도 시 군 등 지자체에서 왕성한 활동을 벌이고 있는 축산관련 기관을 찾아 릴레이 형식으로 탐방을 통해 지자체의 활동을 소개하고 있다. 이달은 경기도 광주시를 찾아 광주시의 활동상황 및 양계정책 방안을 들어보았다.