試験脱炭炉における二次燃焼特性への少量スラグの影響(速度論および要素技術)(<特集>転炉機能の拡大)

概要

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Effects of flux and slag volume on the characteristics of post-combustion were studied by using a 10 t ladle type test furnace with pre-treated molten pig iron. Three kinds of flux were used : CaO, CaO-MgO and SiO_2, and amount of flux addition was varied between 3 to 15 kg/t. Followings are brief results. In the case that the cavity depth by O_2 jet was lower than 150 mm deep, the post-combustion ratio decreased in every flux addition as compared with no flux addition. Especially, SiO_2 flux addition caused the lowest post-combustion ratio. From the results of heat balance, it was made clear that the heat efficiency for heating the bath decresed sharply in SiO_2 flux adding heat. The reason is considered to be that, in SiO_2 flux adding heat, slag foaming was very high. Some mechanisms are proposed to explain the decrease of the post-combustion ratio by the addition of SiO_2 flux.
社団法人日本鉄鋼協会の論文
1990-11-01