황산용액에서 해사 티탄철석내의 티타늄 침출거동
Leaching Behavior of Titanium from Beach Sand Ilmenite in Sulfuric Acid Solution
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
본 연구에서는 메카노케미컬 처리된 티탄철석(ilmenite)의 황산용액 내에서의 침출거동을 조사하였다. 교반속도, 고/액비, 시간, 침출온도 및 황산농도가 Ti 침출율에 미치는 영향을 평가하였다. 침출실험은 교반속도 600 rpm 및 고액비 1/60로 고정한 후 60～90℃범위의 온도와 2～6 M 범위의 황산농도에서 실시하였다. 실험 결과 침출 온도 및 황산 농도가 높을수록 Ti의 침출율은 증가하였으며 침출속도는 Dickinson and Heal 모델로 해석하는 것이 가장 적합하였다. 모델식에 의한 활성화 에너지(Ea)는 110.70 kJ/mol, 반응 차수(n)는 2.41이었다. 반응속도는 반응 계면의 이동(Interface transfer)과 생성물 층에서의 확산에 동시에 영향을 받는 것으로 판단된다.
Abstract
In this study, leaching behavior of Ti from ilmenite was investigated for establishing an efficient process of Ti leaching. The effects of agitation speed, S/L (Solid/Liquid) ratio, leaching temperature and sulfuric acid concentration on the leaching rate of Ti was assessed. The experiment was proceeded under the conditions; temperature between 60 and 90℃ and concentration of sulfuric acid between 2～6 M after fixing agitation speed (600 rpm) and S/L ratio (1/60). As the result of kinetics, data for the leaching rate was observed to agree better to Dickinson and Heal model than any other models. The activation energy was determined to be 110.70 kJ/mol and order of reaction was determined to be 2.41 in this model. The leaching rate of Ti was influenced by both the interfacial transfer and diffusion across the product layer.
참고문헌 (18)
- 김병수, "鹽酸溶液에서 蛇紋石으로부터 마그네슘의 浸出擧動", 한국자원공학회지, 45(6), pp.627~634 (2008), 한국자원공학회
- 김진수, "해사 티탄철광으로부터 TiO2 합성 및 광촉매 활성", 한국자원공학회지, 47(3), pp.359~368 (2010), 한국자원공학회
- Amer, A.M, "Investigation of the direct hydrometallurgical processing of mechanically activated low-grade wolframite concentrate", Hydrometallurgy, 58(3), pp.251~259 (2000)
- Amer, A.M, "Alkaline pressure leaching of mechanically activated Rosetta ilmenite concentrate", Hydrometallurgy, 67(1), pp.125~133 (2002)
- Dehghan, R, "Leaching and kinetic modelling of low-grade calcareoussphalerite in acidic ferric chloride solution", Hydrometallurgy, 96(3), pp.275~282 (2009)
- Dickinson, C.F, "Solid-liquid diffusion controlled rate equations", Thermochimica Acta, 340(9), pp.89~103 (1999)
- Han, K.N, "Leaching behaviour of ilmenite with sulfuric acid", Metallurgical Transactions B, 18(2), pp.325~330 (1987)
- Liddell, K.C, "Shrinking core models in hydrometallurgy: What students are not being told about the pseudo-steady approximation", Hydrometallurgy, 79(9), pp.62~68 (2005)
- Li, C, "Combined milling dissolution of Panzhihua ilmenite in sulfuric acid", Hydrometallurgy, 82(11), pp.93~99 (2006)
- Liang, B, "Leaching kinetics of Panzhihua ilmenite in sulfuric acid", Hydrometallurgy, 76(3), pp.173~179 (2005)
- Li, M, "Kinetics of vanadium dissolution from black shalein pressure acid leaching", Hydrometallurgy, 104(2), pp.193~200 (2010)
- Sasikumar, C, "Effect of mechanical activation on the kinetics of sulfuric acid leaching of beach sand ilmenite from Orissa, India", Hydrometallurgy, 75(18), pp.189~204 (2004)
- Sasikumar, C, "Dissolution studies of mechanically activated Manavalakurichi ilmenite with HCl and H2SO4", Hydrometallurgy, 88(17), pp.154~164 (2007)
- Van Dyk, J.P, "Kinetics of ilmenite dissolution in hydrochloric acid", Hydrometallurgy, 65(5), pp.31~36 (2002)
- Welham, N.J, "Enhancement of the dissolution of ilmenite (FeTiO3) by extended milling", Transactions of the Institution of Mining Metallurgy, Section C: Mineral Processing and Extractive Metallurgy, 106, pp.138~141 (1997)
- Welham, N.J., "Mechanical enhancement of the dissolution of ilmenite", Minerals Engineering, 11(4), pp.827~841 (1998)
- Welham, N.J, "Enhanced dissolution of tantalite", columbite following milling, 2001, pp.61(1), 145~154
- Zhang, S, "Kinetics of the dissolution of ilmenite in sulfuric acid solutions under reducing conditions", Hydrometallurgy, 103(30), pp.196~204 (2010)