ACTIVATING SULFURIC ACID LEACHING TO EXTRACT VALUABLE METALS FROM OCEAN MANGANESE NODULES

An activating sulfuric acid leaching of ocean manganese nodules at ambient temperature and pressure is conducted to comprehensively recover nickel,cobalt,copper,and manganese.The effect of various parameters on leaching and the behavior of different active leaching systems are researched.The results show that H 2SO 4-H 2SO 3(SO 2)system is optimum.The investigation of various leaching circuit structures shows that reductive activation-oxidation leaching is comparatively reasonable and realizable as a selective leaching process.