炭化鉄の生成挙動に及ぼす脈石成分の影響

概要

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The purpose of this investigation is to clarify the effect of gangue composition (Al_2O_3, CaO, SiO_2 and MgO) in the hematite pellets on the synthesis of Fe_3C pellets. Pure hematite pellets and those contained one, two or three kinds of the gangue compositions were reacted in the atmosphere with H_2-30vol%CH_4 gas mixture at 750℃. It was confirmed that the Fe_3C were produced when the pellets containing Al_2O_3 (1, 3, 5 mass%), MgO (1, 3, 5 mass%) and SiO_2 (5 mass%) were reduced. All of the reduced pellets had the similar supecific surface area. However, the structure of reduced iron phase were different form each other. The reduced pellets containing Fe_3C had the iron phase with many micro pores, and the reduced pellets containing no Fe_3C 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 Fe_3C is suppressed by CaO and promoted by Al_2O_3.
社団法人日本鉄鋼協会の論文