Importance

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Abstract

Molten pig iron flows from the hearth of a blast furnace down a runner positioned on the floor of a cast house and into ladles for receiving the iron. The runner is constructed by a plurality of precast refractory side blocks and an interconnecting base of compacted particulate refractory material to form a substantially U-shaped trough extending a preselected distance and along a preselected path from the hearth to one or more ladles for conveying the iron from the blast furnace. The trough has opposed upstanding side walls and a floor extending between the bottom of the side walls. The side walls are formed by individual side blocks positioned in abutting end to end relation on the cast house floor. The compacted base forming the trough floor extends between and interconnects with the side blocks. The adjacent ends of the side blocks are notched to form a joint for receiving castable refractory material which upon setting interlocks the ends of adjacent side blocks. The side blocks are selectively positioned relative to one another to extend the path of the runner in a preselected direction and to connect branch runners with the main runner. In the event a portion of the side wall or floor of the trough becomes worn, a replacement side block is inserted and additional particulate refractory material compacted into position. The trough can be covered by positioning individual refractory cover blocks in end to end relation on the upper edges of the side blocks to span the trough above the floor.

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First Claim