APPARATUS FOR PREVENTING CRATER FORMATION Russian patent published in 2005 - IPC

FIELD: metallurgy, namely casting melt metal to billets.

SUBSTANCE: apparatus includes bottom and lateral wall forming outlet opening arranged opposite relative to bottom and having mounting portion for fastening apparatus in bottom of metallurgical vessel for casting metal with slag. Said lateral walls are provided at least with two through openings. Outer lateral walls are mounted in such a way that there is gap between outer and inner lateral walls. Height of outer walls is less than that of inner walls. Lower level of through openings is spaced by distance h (mm) from bottom of metallurgical vessel; said distance is determined according to condition h > h₁ + h_2, where h₁ - distance between end of outer lateral wall and bottom of vessel, mm; h₂ - height of slag layer over metal in metallurgical vessel, mm. Height of inner lateral walls is to be more than that of outer lateral walls by value no less than height of mounting portion of inner lateral walls.

EFFECT: elimination of crater formation at casting metal from metallurgical vessel, reliable prevention of slag penetration to metal during casting process, enhanced quality of metal and cast billets.

6 cl, 7 dwg