スラグ-溶融金属間反応速度に及ぼすガス吹込み攪拌の影響

概要

論文の詳細を見る
Kinetic studies have been made on the rate of reaction between molten slag and metal with gas-injection stirring. The explored reaction is oxidation of Si in molten Cu by FeO in a Li_2O-SiO_2-Al_2O_3-FeO slag taking place under the condition of rate-controlling by Si transport in the metal phase. Kinetic experiments were done at 1250℃. The slag-metal bath was stirred by Ar gas injected through a nozzle located at the crucible bottom. The apparent metal-side mass-transfer coefficients of Si, K_<Si>′, are calculated from the kinetic data. Relations between K_<Si>′ and experimental conditions (gas flow-rate, V_g ; metal depth, h_M ; slag depth, h_<sl> ; crucible diameter, d_c) have been investigated. K_<Si>′is found to increase generally with increasing V_g. The dependence of K_<Si>′on the gas flow-rate varies at certain gas flow-rates denoted by V_g^* and V_g^<**>. In the low V_g range (V_g<V_g^* : Region I), k_<Si>′is proportional to (V_g/d_c^2)^<1/2>. In the medium V_g range (V_g^*<V_g<V_g^<**> : Region II), the effect of the increase in gas flow-rate on K_<Si>′is cosiderably smaller than in Region I. In the high V_g range (V_g>V_g^<**> : Region III), the extent of the increase in K_<Si>′with V_g increases again. It is also found that K_<Si>′increases with metal depth, h_M. below a transitional depth, h_M^*. Above the transitional metal depth h_M^*, K_<Si>′becomes independent of h_M. Examinations have been performed of the influence of slag depth, h_<sl>, on K_<Si>′in Regions I and II. In Region I, K_<Si>′is independent of h_<sl>. In Region II, K_<Si>′decreases with the decrease of slag depth.
社団法人日本鉄鋼協会の論文
1987-08-01

スラグ-溶融金属間反応速度に及ぼすガス吹込み攪拌の影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク