Abstract:

To distill and utilize the ocean metallic resource effectively and reasonably, the chemical and mineral composition of the ocean manganese nodules was tested and their cobaltic existence state was analyzed. The method of reduced ammonia marinate was selected to do the distill experiment of cobalt and of other metallic elements from ocean manganese nodules and the iron in marinated solution was removed with ammoniojarosite and cobalt was separated from other metallic element with method of sulfuration deposition. The result indicates that the content of cobalt in ocean manganese nodule can reach up to 0.30% and it is hosted in cobaltic silicate, oxide and sulfide. The method of reduced ammonia marinate can dissolve many kinds of metallic elements from manganese nodule effectively with a maximum cobaltic distill ratio of  93.25%. Ammoniojarosite can remove iron from the marinated solution entirely. The distilled cobalt is pure as except trace chromium, no other metallic elements can be found in it.

Key words: ocean manganese nodules, existence state, cobaltic distill