Abstract
Na2CO3 was proven to enhance the reduction of stubborn iron minerals, which decreased the melting point of refractory iron ores and promoted the aggregation of iron grains. Many studies have revealed that the thermal decomposition of Na2CO3 easily proceeds in the sequence of Na2CO3 → Na2O → Na. In this study, the effect of Na2CO3 on the reduction of iron oxides was investigated. The results indicated that a CO-CO2 atmosphere promoted the reduction of Na2CO3, as well as the volatilization of Na. Then, Na(g) acted as an intermediate medium, which could easily reduce iron oxides, accompanied by mass transfer of Na and the formation of reducible sodium iron oxides.
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