The electrochemical reduction mechanism of Fe3O4 in NaCl-CaCl2 melts

Author:

Li Hui1,Jia Lei1,Cao Weigang1,Liang Jinglong1,Wang Le1,Yan Hongyan1

Affiliation:

1. North China University of Science and Technology , 063009 , Tangshan , Hebei , China

Abstract

Abstract In order to study the process of Fe3O4 reduction by melt electro-deoxidation. Electrochemical method was used to analyze the reduction mechanism of Fe3O4 in NaCl-CaCl2 melts. The effects of cell voltage and time on the product were discussed through constant cell voltage electrolysis. The results showed: (1) The reduction of solid Fe3O4 to metallic Fe is a two-step process for obtaining electrons. (2) The transformation process (600 min, 0–1.0 V) of the electrolysis products with the increase of the cell voltage is as follows: Fe3O4 → FeO → FeO + Fe → Fe. (3) The intermediate product Ca2Fe2O5 was formed (2.0 V, 10–300 min), which inhibited the deoxygenation process in the early stage of the reaction. When the electrolysis time exceeds 60 min, the main reaction is the reduction of Ca2Fe2O5 to Fe.

Funder

National Natural Science Foundation of China

Hebei Province Higher Education Science and Technology Research Project

Graduate Student Innovation Fund of North China University of Science and Technology

Publisher

Walter de Gruyter GmbH

Subject

General Chemical Engineering

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