마그네슘함량이 높은 니켈 laterite광으로부터 습식공정에 의한 니켈과 코발트 회수

• Published in: 대한금속·재료학회지, 48(1) pp. 62 - 70
• Main Authors: 이만승, 김상배, 최영윤, 채종귀
• Format: Journal Article
• Language: Korean
• Published: 대한금속·재료학회 01.01.2010
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241

Leaching and solvent extraction experiments have been performed to develop a hydrometallurgical process for the recovery of nickel and cobalt from nickel laterite ore with high magnesium content. Most of the nickel and magnesium in the laterite ore dissolved at leaching conditions of 80℃ and 100 g/L sulfuric acid concentration, while half of the cobalt and iron were leached at the same conditions. Solvent extraction experiments were carried out with D2EHPA and saponifed D2EHPA from a synthetic solution containing Ni,Co, and Mg. The extraction percentage of Co, Mg, and Ni by D2EHPA was very low in a pH range of 4.4 to 7.3, while the extraction percentage sharply increased by using saponified D2EHPA. The stripping percentage of the metals from the saponified D2EHPA increased with sulfuric acid concentration and reached 99.9% at 1 M H2SO4 solution. KCI Citation Count: 3