包钢3号高炉(1800m~3)于1988年7月停炉大修。为了烘好炉底和缩短工期,于12月4～8日进行了电烘炉底。供电采用主卷扬的4号大MG 机组,控制电压不超过700V、电流不超过700A,电热材料选用φ18mm 螺纹钢,钢筋总长度为538m,总重1076kg。炉缸直径为φ9700mm,炉底共敷设钢筋62根,其中心间距130mm,钢筋表面满铺石棉板,采用铬铝电偶测温,共测六点。烘炉 Baotou No. 3 blast furnace (1800m ~ 3) in July 1988 shutdown overhaul. In order to bake the furnace bottom and shorten the construction period, December 4 to 8 carried out electric baking bottom. Power supply using the main hoist on the 4th MG unit, the control voltage does not exceed 700V, the current does not exceed 700A, electric material selection φ18mm rebar, steel total length of 538m, total weight 1076kg. The hearth diameter of φ9700mm, the bottom of the laying of a total of 62 steel, the center spacing 130mm, asbestos covered steel bar surface, the use of chrome-aluminum galvanic temperature, a total of six points. Ovens