GEAR FOR CONTINUOUS CASTING AND PROCESS OF MANUFACTURE OF THIN FLAT INGOTS Russian patent published in 1999 - IPC

FIELD: continuous casting of steel to produce thin ingots with preset thickness after hardening. SUBSTANCE: gear includes rectangular mould connected to vibration source, immersible barrel and aid to feed foundry powder. Mould has concave internal circuit with enlarged inlet and diminished outlet of rectangular shape. Aid to feed foundry powder is connected to vibration source of mould via regulating and measuring unit that feeds powder depending on amplitude, form and frequency of vibrations with keeping of height h of slag above or equal to height of hardened shell of billet located above level of metal in upper position of mould. Immersible barrel has cross-section area (F_TA) of immersible barrel larger or equal to 1/50 area of cross-section (F_ST) of completely hardened ingot. Multiroller stand with hydraulic fixture providing stepless change of distance between opposite rollers is positioned after mould in direction of stretching. In process of casting reduction of cross-section of billet is conducted in front of mould in multiroller stand in several operations with simultaneous reduction of thickness of billet by forced convection of its still liquid core. Final thickness of billet is given at end of stand and hardening is achieved in it when billet crosses outlet from stand and two phases are present inside it. Usage of invention provides for optimal quality of surface of billet with minimal and specified thickness of hardening set in advance and minimal capacity of stand which leads to minimal expenses for rolling. Coordination of above-mentioned parameters of process and gear for continuous casting of steel leads to good and favorable supply of slag and travel of bath at level of melt surface illustrated by example of ingot of standard size with thickness of 200.0 mm. Distance from boundary of settling tank and to melt surface influence directly quality of surface and internal structure of billet and safety of casting. EFFECT: provision for optimal quality of surface of billet and minimal expenses for rolling. 5 cl, 7 dwg