Side wall damage suppression law null of blast furnace iron runner

摘要

PURPOSE:To suppress the damage on the side wall of a blast furnace tapping spout and to easily repair or rebuild the tapping about by deeply forming the base near the lower side of a skimmer damper and subjecting a slag splashing part and tapping rising part to chipping or building up of a refractory material. CONSTITUTION:The molten slag A and molten iron B tapped from a tap 2 of the blast furnace into the blast furnace tapping spout 1 are passed through a stirring zone E and a dispersing zone F and are separated by a difference in specific gravity in a floating zone G. The molten iron G separated therein is passed under the damper 7 in a static zone H and is supplied from a branch spout 4 via the tapping rising part 6 into a vessel for the molten iron. On the other hand, the floating molten slag A is conducted through the slag spout 3 of the slag splashing part 5 into a water granulating dry pit where the slag is treated. The base of such tapping spout 1 near the lower side of the skimmer damper 7 is formed more deeply than the base on the upper stream side thereof. The above-mentioned slag splashing part 5 and/or the tapping rising part 6 is subjected to chipping and/or building up of the refractory material. The level change of a slag line C or metal line D is thereby executed, by which the local damage of the side wall is suppressed and the life of the spout is extended; in addition, the required repair and rebuilding of the damage are made easier.