流体力学にもとづく高炉炉床での溶滓の流れの検討と残滓量と出滓条件の関係の検討 福武 剛 岡部 侠児 社団法人日本鉄鋼協会 鐵と鋼 : 日本鐡鋼協會々誌 00211575 60 6 607 621 1974-05-01 In order to clarify the causes of the excess accumulation of molten materials in the blast furnace hearth which results in blast furnace troubles, such as hanging and slipping, the behaviour of flowing out and accumulation of slag in the furnace hearth is investigated. The results of model studies of slag flow in the furnace hearth during tapping were analyzed as the scale-up problem based on the theories of fluid dynamics. The dimensionless flow-out coefficient F_L in eq. (32) has been found to be closely related to the slag residual ratio, i.e. the ratio of residual amount of slag at the end of tapping to that accumulated at the begining (Fig.8). Further investigation using this relation shows that eight independent variables, i.e. viscosity, tapping amount, tapping rate and depth of slag, hearth diameter, effective hearth area, number of tapping and permeability of packed coke, determine the behaviour of flowing out and accumulation of slag in the furnace hearth. The results of investigations are as follows ; 1) The residual amount of slag and the depth of slag layer increase with the increase in slag tapping rate and of slag viscosity. 2) The increase of the number of tapping operation is beneficial in maintaining the smooth furnace operation, if the tapping rate and/or slag viscosity increase. 1974-05-01 110001467574 AN00151251 7583093 JPN CJPref NDL NII-ELS 3 6 Investigation of Slag Flow in the Blast Furnace Hearth Based on the Fluid Dynamics and of Relation between Residual Slag Amount and Tapping-out Conditions FUKUTAKE Tsuyoshi OKABE Kyoji The Iron and Steel Institute of Japan (ISIJ) Tetsu- to- Hagane In order to clarify the causes of the excess accumulation of molten materials in the blast furnace hearth which results in blast furnace troubles, such as hanging and slipping, the behaviour of flowing out and accumulation of slag in the furnace hearth is investigated. The results of model studies of slag flow in the furnace hearth during tapping were analyzed as the scale-up problem based on the theories of fluid dynamics. The dimensionless flow-out coefficient F_L in eq. (32) has been found to be closely related to the slag residual ratio, i.e. the ratio of residual amount of slag at the end of tapping to that accumulated at the begining (Fig.8). Further investigation using this relation shows that eight independent variables, i.e. viscosity, tapping amount, tapping rate and depth of slag, hearth diameter, effective hearth area, number of tapping and permeability of packed coke, determine the behaviour of flowing out and accumulation of slag in the furnace hearth. The results of investigations are as follows ; 1) The residual amount of slag and the depth of slag layer increase with the increase in slag tapping rate and of slag viscosity. 2) The increase of the number of tapping operation is beneficial in maintaining the smooth furnace operation, if the tapping rate and/or slag viscosity increase. 福武 剛 FUKUTAKE Tsuyoshi 川崎製鉄(株)技術研究所 岡部 侠児 OKABE Kyoji 川崎製鉄(株)技術研究所