Study on the Reduction of Magnetite Pellets Containing Anthracite
1971 Volume 57 Issue 3 Pages 465-484
Details
1971 Volume 57 Issue 3 Pages 465-484
A study was made of the influence of firing atmosphere (CO2-N2, N2, and CO-N2) on the reduction of magnetite pellets containing anthracite. Phase change during the firing was investigated by X-ray diffraction method and microscopic observations. The results are as follows.
1) The finer the particles of are and anthracite were, and the more content of anthracite in initial pellet was, the faster the reduction proceeded.
2) Fayalite was found in the outside layer of magnetite pellets which were fired in CO2-, N2 atmosphere.
3) The amount of residual carbon in pellets decreased rapidly during the first 30 min of firing in every atmosphere, but the decrease was most rapid in CO2-N2 atmoshere.
4) It was found in microscopic observations that reduction of are particles in pellets proceeded topochemically.
5) Decrepitation and lamellar structure of metallic iron were found in some of are particles in pellets fired.
6) Cementation of metallic iron was observed in pellets fired in N2and CO-N2atmosphere.
