取鍋耐火物の不定形化

概要

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Although refractory used in melting shop has been conventionally brick, automation and saving of man- power in operation by putting refractory into furnace by introduction of monolith of refractory has been an important subject by the following reasons; (1) Making of furnace by stacking bricks requires skillful operation, and (2) Aging of operator in charge of making furnace makes this a difficult work. These days, monolith of refractory has been proceeded by development of mainly castable refractory (and loosely cemented fine and high-density refractory material), and they have been applied to blast furnace gutter, ladle, tundish, RH and so on. Shibukawa Plant of Daido Steel Co., Ltd. has made a first try among specialty steel manufactures to apply monolith of refractory to ladles used in VLF (Vacuum Ladle Furnace) refining since 1995 in order to decrease working time and refractory material cost for the first time. A target of applying the monolith of ladle refractory has been attained by introducing a method of poring Al2O3-MgO castable into bottom and wall of the ladle, and by spraying wet refractory with various kinds of improvement.
電気製鋼研究会の論文