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Processing Manganiferous Sea Nodules.

Authors
Brooks-PT; Martin-DA
Source
NTIS: PB 197 024 :19 pages
Link
NIOSHTIC No.
10009218
Abstract
Mineral nodules from the ocean floor represent a vast potential source of manganese, nickel, cobalt, and copper. Process development studies to devise methods for recovering these metals were conducted by the Bureau of Mines using two types of nodules-- relatively low-grade calcareous nodules from the Atlantic ocean and higher grade siliceous nodules from the Pacific ocean. Ammoniacal carbonate leaching of reduced nodules appeared to have the best potential for processing the calcareous nodules, but the method proved to be impractical for recovering manganese. Extraction of 90 percent or better of the nickel, cobalt, and copper showed the technique to be attractive for recovery of these metals. The siliceous nodules appeared amenable to a process that starts with either a sulfur dioxide leach or a sulfation roast followed by a water leach to dissolve the soluble sulfates.
Publication Date
19710101
Document Type
IH; Report of Investigations
Fiscal Year
1971
NTIS Accession No.
PB-197024
NTIS Price
A03
Identifying No.
RI 7473
NIOSH Division
SLRC;
Source Name
NTIS: PB 197 024
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