The purpose of this investigation is to clarify the effect of gangue composition (Al2O3, CaO, SiO2 and MgO) in the hematite pellets on the synthesis of Fe3C pellets. Pure hematite pellets and those contained one, two or three kinds of the gangue compositions were reacted in the atmosphere with H2-30vol%CH4 gas mixture at 750°C. It was confirmed that the Fe3C were produced when the pellets containing Al2O3 (1, 3, 5 mass%), MgO (1, 3, 5 mass%) and SiO2 (5 mass%) were reduced. All of the reduced pellets had the similar specific surface area. However, the structure of reduced iron phase were different form each other. The reduced pellets containing Fe3C had the iron phase with many micro pores, and the reduced pellets containing no Fe3C had that with no micro pores. For the pellets contained two or three kinds of the gangue compositions, it was recognized that the formation of Fe3C is suppressed by CaO and promoted by Al2O3.
|ジャーナル||Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan|
|出版ステータス||出版済み - 6 2001|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry