Low carbon ferrochromium was prepared from high carbon ferrochromium in NaCl?KCl molten salts by one-step potentiostatic electrolytic refining (0.3 V, vs. Ag/AgCl), with high carbon ferrochromium acted as working electrode, tungsten acted as counter electrode and Ag/AgCl as reference electrode. The mechanism of electrodeposition of dissolved Cr ions was investigated by square wave voltammetry. Microscopic and phase characterization of cathodic products were analyzed. The results showed that the reduction of chromium ions is a one-step reversible process with two electrons exchanged, which is controlled by diffusion mass transfer, and chromium was dissolved prior to iron in molten salts. The produced low carbon ferrochromium is mostly composed of spherical particles with the size ranging from 0.5 to 2 ?m. The carbon content of the cathode product was 0.24wt%.
Wei LIU Guolong LIU Meichen WANG Saijun XIAO
. Preparation of Low Carbon Pure Ferrochromium from High Carbon Ferrochromium by Molten Salts Electrorefining[J]. The Chinese Journal of Process Engineering, 2018
, 18(1)
: 177
-181
.
DOI: 10.12034/j.issn.1009-606X.217235
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