Patent ID: 6576039
Filing Date: 2003-06-10
Classification: B22D,C21C,F27B,F27D

Abstract:
A method for improving metal yield by adjusting a tilt angle of a tilting vessel having a submerged tap hole, the method comprising:a) measuring a tilt angle of a tilting vessel while discharging liquid metal from said tap hole into a second vessel; b) determining a selected set of pouring parameters selected from the group consisting of: i) the proximity of the tilting vessel contents to the vessel lip; ii) the age of said tap hole; iii) the amount of slag in said tilting vessel; iv) the amount charged to said tilting vessel; v) the amount of metal discharged into said second vessel; vi) the amount of said tilting vessel contents; vii) the inner geometry of said tilting vessel; viii) the presence of slag in the tapping stream; ix) the liquid head over said tap hole; x) the tapping trajectory from at least one historical pour; xi) the total tapping time from at least one historical pour; xii) the elapsed discharge time; xiii) the critical height of vortexing; xiv) the final drain angle; xv) the steel grade; xvi) the steel chemistry; xvii) the slag chemistry; xviii) the temperature of said vessel contents; xix) the throughput of liquid metal exiting said tap hole; xx) the presence of vortexes; xxi) the distortion of said tapping stream; and xxii) the size of the tap hole; c) receiving a condition input for each pouring parameter in said selected set of pouring parameters; and d) adjusting said tilt angle of said tilting vessel in response to each condition input of said selected set of pouring parameters.