RI 3613 Manganese Investigations - Metallurgical Division - 3. Ore-Dressing Studies Of Manganese Ores - Concentration Of Manganese Nodules From Chamberlain, S. Dak. ? Introduction (1766c14f-25bc-49ae-83cb-1d5234e59ac9)

The low-grade deposits of manganese ores along the Missouri River near Chamberlain, S. Dak., are known to contain one of the largest reserves of manganese in the United States. Manganese occurs as concretionary nodules ranging in size from 13 inches in their longest dimension to particles finer than 65-mesh. The nodules are embedded in soft, wet shale, which contains little manganese. The removal of nodules from the low-grade shale is a simple mechanical problem; the question is primarily to determine the lowest-cost method of separation. This report purposes to present data acquired by experimenting with samples of the ore, which form a basis for suggesting methods of concentrating manganese nodules.