The stave 3L is a plate-shaped stave body 10 arranged along the furnace inner surface of the iron skin and facing each other, and a seal that is fixed to the lower surface side of the stave body 10 to seal the gap with the iron skin. With the member 20, the end edges 201 and 202 protrude from the side surface of the stave main body 10 and are inclined with respect to the thickness direction of the stave main body 10. As for the sealing member 20, the end edges 201 and 202 on both sides are mainly inclined to the same side. The end edges 201 and 202 of the seal member 20 are equipped with an elastic member 26 on the end edge side, and an elastic member 25 on the outside of the furnace at the edge of the outer side of the furnace facing the iron shell of the seal member 20. Is equipped.
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