PURPOSE: To obtain a unidirectional solidified ingot having free size by shifting a short side mold as keeping constantly molten surface level after reaching the prescribed level for the molten surface in the mold.
CONSTITUTION: The molten steel is poured from a ladle 7 through an immersion nozzle 4 of a pony ladle 6, and after the molten steel is reached to the prescribed level, the short side mold 3 ' is shifted together with a bottom plate and side wall by driving a caterpillar. After the movable short side mold 3 ' is reached at the prescribed position, the caterpillar is stopped and the molten steel is stably laid to progress the unidirectional solidification. In the bottom plate block on the caterpillar, at the same time with starting the casting or at the same time with putting stably the molten steel and starting the solidification, coolant is supplied from outside of this apparatus and by strengthening the cooling from the ingot bottom, the unidirectional solidification is promoted and also the leusly solidified structure is obtd. When the height of ingot is reached to the prescribed height, an ingot top removing device is shifted to remove dense segregation part together with molten surface coating agent and exothermic heat insulating agent. Next, by driving the caterpillar, the ingot is drawn out to forward and also the short side mold 3' is removed at the end of caterpillar.
| JPS5428231 | INGOT MAKING BY BOTTOM POURING |
MIYAGAWA SHOJI
SHINJO YUTAKA
OGUCHI MASAO
EJIMA AKIO
