학술논문
A Precipitation Separation Method for Cu, Ni and Co Recovery from Sulfurous Acid Leach Liquor of Sea Manganese Nodule / マンガン・ノジュール亜硫酸浸出液からの沈殿分離法によるCu, NiおよびCoの回収
Document Type
Journal Article
Author
Source
日本鉱業会誌 / Journal of the Mining and Metallurgical Institute of Japan. 1986, 102(1183):585
Subject
Language
Japanese
ISSN
0369-4194
2185-6729
2185-6729
Abstract
A precipitation separation method has been investigated at ambient temperature to recover Cu, Ni and Co from sulfurous acid leach liquor of deep sea manganese nodules.The Cu, Ni, Co and Mn values are completely leached out of the nodule byusing a slight excess amount of sulfurous acid for reducing MnO2 in nodules to Mn2+, whereas 30% of Fe is undissolved. Fe2+ is oxidized by aeration and precipitated as Fe (OH) 3 by adjusting pH of the leach liquor to 4.2-4.4. Subsequently, Mn is precipitated as MnCO3 by adding (NH4) 2CO3 when Cu, Ni and Co in the solution are stabilized as ammine-complexes in the presence of NH+4 added as ammonia-water, (NH4) 2CO3, (NH4) 2SO3 or (NH4) 2SO4. After several trials, over 90% recoveries of Cu, Ni and Co are obtained and about 97% of Mn and 99.9% of Fe could be removed. The optimum conditions for recovering metal values will be discussed.