TREATMENT OF MANGANESE-CONTAINING MATERIALS

摘要

An improved method for treating manganese-containing materials, such as seafloor manganese nodules, by leaching such materials with aqueous HNO3 and polymerized nitric oxide (N2O3)x, and more particularly to methods for recovering valuable constituents from such nodules, especially manganese, cobalt, nickel, iron, and copper. It also provides a method to leach manganese-containing material to release any titanium, vanadium, cerium, molybdenum and other metals from the manganese oxides and to make them available to be recovered, as well as providing a method of producing a fertilizer grade nitrate product.

主权项

1. A method of recovering manganese from manganese-containing materials, comprising the steps of:
a. obtaining manganese-containing materials having a manganese content of at least 5%; b. leaching the manganese-containing materials with HNO3 and polymerized nitric oxide (N2O3)x in an aqueous solution to form MnO and to release the other metals; c. filtering the acid-insoluble residue from the solution leaving desired metal values in solution; and d. precipitating and recovering manganese.