鹽化구리와 鹽化鐵 混合溶液의 組成이 pH와 溶液電位에 미치는 影響
Effect of Composition on the pH and Solution Potential of Mixed Solutions of Copper and Iron Chloride
1
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
염화 제 2철용액에 의한 구리황화광의 침출액을 모사하기 위해 FeCl₃-FeCl₂-CuCl₂-CuCl-NaCl-HCl-H₂O의 조성을 지닌 합성용액을 제조하였다. 합성용액에서 염화철과 염화구리의 농도를 0.1에서 1 m까지 변화시키며 성분의 농도변화에 따른 25˚C에서 용액의 pH와 전위의 변화를 측정하였다. 염산의 농도가 일정한 조건에서 CuCl의 농도를 증가시키면 용액의 pH는 증가하였다. 그러나 염산과 CuCl의 농도가 일정한 조건에서 다른 용질의 농도를 증가시키면 수소이온의 활동도계수가 증가하면서 용액의 pH는 감소하였다. CuCl의 농도를 증가시키면 염화 제 1구리이온이 안정해지는 방향으로 반응이 진행하나 FeCl₃은 반대의 효과를 나타냈다.
Abstract
In order to simulate the leaching solution of copper sulfide ore in FeCl₃ solutions, synthetic solutions with composition of FeCl₃-FeCl₂-CuCl₂-CuCl-NaCl-HCl-H₂O were prepared. The concentration of iron and copper chloride was varied from 0.1 to 1 m in synthetic solutions. The effect of composition on the mixed solution pH and potential at 25˚C was measured. When HCl concentration was constant, the increase of CuCl concentration increased solution pH. The increase of other solutes excluding HCl and CuCl decreased solution pH owing to the increase of the activity coefficient of hydrogen ion. A high CuCl concentration favored the redox equilibrium in the direction of Cu(I), while FeCl₃ had the opposite effect.
참고문헌 (16)
- Córdoba, E. M., "Leaching of chalcopyrite with ferric ion. Part I. General aspects", Hydrometallurgy, 93, pp.81~87 (2008)
- Córdoba, E. M., "Leaching of chalcopyrite with ferric ion. Part I. Effect of redox potential", Hydrometallurgy, 93, pp.88~96 (2008)
- Lundström, M., "Leaching of chalcopyrite in cupric chloride solution", Hydrometallurgy, 77, pp.89~95 (2005)
- Mcdonald, G. W., "Cupric chloride leaching of model sulfur compounds for simple copper ore concentrates", Metallurgical Transactions B, 14B, pp.559~570 (1983)
- Antonijeviæ, M. M., "Investigation of the leaching of chalcopyritic ore in acidic solution", Hydrometallurgy, 73, pp.245~256 (2004)
- Carranza, F., "Treatment of copper concentrates containing chalcopyrite and non-ferrous sulphides by the BRISA process", Hydrometallurgy, 71, pp.413~420 (2004)
- Palencia, I., "Treatment of secondary copper sulphide (chalcocite and covellite) by the BRISA process", Hydrometallurgy, 66, pp.85~93 (2002)
- Aydogan, S., "Dissolution kinetics of sphalerite in acidic ferric chloride leaching", Chemical Engineering Journal, 114, pp.67~72 (2005)
- Park, K. H., "A study on the acidified ferric chloride leaching of a complex (Cu-Ni-Co-Fe) matte", Separation and Purification Technology, 51, pp.332~337 (2006)
- Lee, M. S., "Use of the Bromley equation for the analysis of ionic equilibria in mixed ferric and ferrous chloride solutions at 25oC", Metallurgical and Materials Transactions B, 37B, pp.173~179 (2006)
- Wang, M., "Critical evaluation of thermodynamics of complex formation of metal ions in aqueous solutions III. The system Cu(I,II)-Cl- -e at 298.15K", Hydrometallurgy, 45, pp.53~72 (1997)
- 이만승, "염화 제1구리와 제2구리 혼합용액의 이온평형", 대한금속·재료학회지, 46(1), pp.20~25 (2008), 대한금속ㆍ재료학회
- Mcdonald, G. W., "Equilibria associated with cupric chloride leaching of chalcopyrite concentrate", Hydrometallurgy, 13, pp.125~135 (1984)
- Kimur, R. T., "A mathematical model for calculation of equilibrium solution speciations for the FeCl3-FeCl2-CuCl2-CuCl-HCl- NaCl-H2O system at 25oC", Metallurgical Transactions B, 15B, pp.213~219 (1984)
- Von Bonsdorff, R., "Electrochemical sensors for the HydroCopperTM process solution", Hydrometallurgy, 77, pp.155~161 (2005)
- Zemaitis, J. F., "Handbook of aqueous electrolyte thermodynamics", pp.99~101 (1986), A Publication of the Design Institute for Physical Property Data