Abstract
A description is given of a technology for processing deep-water ferromanganese nodules in the Baltic Sea with the use of sulfatizing roasting. It is shown that the use of this technology makes it possible to recover manganese in solution without the transfer of phosphorus to the solution as well. Results are reported from studies of the precipitation of manganese by ammonia during the subsequent processing of phosphorusbearing ferromanganese nodules (FMN). The results show that manganese can be precipitated by a hydrometallurgical method after sulfatizing roasting is completed as part of FMN processing.
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