N_2-CH_4 および N_2-H_2 雰囲気中の炭材内装クロム鉱ペレットの還元挙動

概要

論文の詳細を見る
Chromium ore pellet containing carbonaceous material was reduced at various temperatures between 1000 and 1200℃ in flowing N_2-CH_4 and N_2-H_2 atmospheres. Below 1050℃ the reduction rate in N_2-CH_4 atmosphere was much higher than that in N_2-H_2 atmosphere. From the consideration about the results of the present and previous works, it was reasoned that such a promoting effect of CH_4 was attributed to the enhanced conversion of CO_2 and H_2O to CO and H_2 with CH_4 and fine carbon deposited from it. To the contrary, above 1100℃ the reduction was retarded in N_2-CH_4 atmosphere. This seemed to be attributed to the fact that in higher temperature range the deposited carbon hindered the mass transfer of gas species through the inside of pellet because it clogged to a large extent the pores, particularly in the peripheral zone of pellet.
社団法人日本鉄鋼協会の論文
1987-09-01