PURPOSE: To improve durability and changeability of a brick in a ladle and a tundish for casting by making a receiving brick with an unburnt magnesia carbon quality refractory and making this inserting or peripheral refractory with the different kind of refractory.
CONSTITUTION: At bottom part of the ladle composed of permanent bricks 2 and lining bricks 3 in inside of an iron shell, a pouring hole for molten steel, etc., is arranged. This pouring hole is constituted by inserting an upper nozzle brick 5 into upper and lower receiving bricks 4, 4' and also arranging a sliding plate 8 through a fixed plate 7 at outer part and fixing a lower nozzle 9 for pouring to this. In the above pouring hole, the above receiving bricks 4, 4' are constituted with the unburnt magnesia carbon quality refractory having good eroding resistance, heat resistance and structural spalling resistance. Further, at least a part of this surrounding refractory bricks 2, 3 and the upper nozzle brick 5 is made of fire clay quality, agalmatolite quality, zircon quality, high alumina quality, etc. By this method, the ladle for casting setting the pouring hole brick having high durability and easy changeability, is obtd.
TANIGUCHI TADAYUKI
TSUBOI YUKIO
KUROSAKI REFRACTORIES CO
| JPS5454904A | 1979-05-01 |