| 摘要 |
An electro-deposition process for simultaneously producing manganese metal and manganese dioxide. Manganese metal and manganese dioxide are simultaneously electro-deposited in an electrolytic cell without the use of membranes separating the anode and cathode compartments. This is accomplished using a manganese chloride electrolyte in a temperature range of about 70 to 90 degrees C., with the free hydrochloride acid being removed from the electrolyte to a level below about 0.1M. The acid removal can be accomplished, for example, with an acid retardation step involving the use of strong base ion exchange resins in the preferred form. This is carried out in a continuous countercurrent current ion exchanger such that the molarity of the electrolyte is achieved with the acid being removed. The process described is suitable for the economical electro-deposition of manganese metal and manganese dioxide from leach solutions obtained from relatively low assay ores having of the order of 10 percent manganese. The current density and current efficiency are such that an economical process is achieved that is competitive with the processes of the prior art utilizing high grade ores.
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