Study on the Reduction of Iron Oxide Powder

Abstract

This study is related to the solid-gas reaction. The focus is placed on the relationship between specific surface area and the deposition of carbon in CO, CO₂ gas atmosphere, and the mechanism of sintering process of reduction powders is also studied.
The results are as follows.
1) Change of specific suface area of reduced powders is dependent on the reduction temperature.
2) The rate of deposition of carbon on the powder reduced at low temperature (500°C, 600°C) is larger than that reduced at high temperature (800°C, 900°C).
3) The correlation between the weight of deposite carbon and the specific suface area is found.
4) The sirtering of reduced powder proceeds through fiber material of 2-5μ in length.