Electrorefining of High Carbon Ferromanganese in Molten Salts to Produce Pure Ferromanganese

Abstract

High carbon ferromanganese is used as a starting material to prepare pure ferromanganese by electrorefining in molten salts. High carbon ferromanganese was applied as the anode, molybdenum was the cathode and Ag/AgCl was the reference electrode. The anodic dissolution was investigated by linear polarization in molten NaCl-KCl system. Then potentiostatic electrolysis was carried out to produce pure ferromanganese from high carbon ferromanganese. The cathodic product was determined to be a mixture of manganese and iron by x-ray diffraction (XRD). The content of carbon in the product was analyzed by carbon and sulfur analyzer. The post-electrolysis anode was characterized by scanning electron microscope (SEM). The mechanism of the anode dissolution and the distribution of the main impurity of carbon and silicon after electrolysis were discussed.

Novel process for producing hierarchical carbide derived carbon monolith and low carbon ferromanganese from high carbon ferromanganese

“…[32][33][34][35][36] However, there is a large amount of manganese remained in slag during decarburization process, which leads to high energy consumption and low metal yield during rening process. In recent years, Xiao et al 37 employed HCMnFe as a raw material and prepared low carbon ferromanganese successfully, demonstrating molten salt electrolysis is a promising and feasible method for the production of low carbon ferromanganese. The mechanism of the anode dissolution was mainly discussed, but no much attention was paid to the anode residue (i.e., carbon) aer electrolysis.…”