ウスタイトの還元速度と還元鉄性状に及ぼす還元ガス中の酸素と硫黄ポテンシャルの影響

概要

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The reduction of dense wustite plates has been investigated in the temperature range from 600 to 1200℃ by hydrogen containing hydrogen sulphide and water vapor of various contents in such proportions that metallic iron remains stable. When the wustite reacts with pure hydrogen at the temperatures except 800℃, the reduction rates are the largest in all the conditions and the reduced iron is porous. At 800 and 1000℃, sulphur in gas of the activity not to form iron sulphide enhances extremely the reduction of wustite due to the conversion into porous iron from the dense iron formed by the addition of H_2O in H_2, and on the contrary sulphur of extremely low activity retards the reduction due to the formation of dense iron even in no addition of H_2O. The enhancement of reduction by sulphur in gas is observed even under the high oxygen potential near the equilibrium between iron and wustite at 1200℃. However, the reduction proceeds to a negligible extent in the sulphur-bearing gas of the high oxygen potential at 800℃. At 1000 and 1200℃, sulphur in hydrogen not to form iron oxysulphide liquid coarsens particles of reduced iron with the lowering of the reduction rates of wustite.
社団法人日本鉄鋼協会の論文
1985-02-01