以前,我厂一直是采用普通粘土质耐火砖和耐火泥修砌冲天炉过桥的,并在过桥表面涂抹一层耐火材料。但是,由于这层耐火材料耐火度低,在高温铁水的冲刷下脱落,铁水对过桥浸蚀严重,使用2～3炉就需更换耐火砖,有时仅开一炉就要更换一次,大大加重了工人劳动量和材料消耗量。若冲天炉熔化量较大时,还可能发生过桥漏水现象,造成事故。 In the past, our factory always adopted ordinary clay refractory bricks and fire-resistant mud to fix the cupola and crossed the bridge surface with a layer of refractory material. However, due to the low refractoriness of this refractory, it falls off under the scouring of high-temperature molten iron and the molten iron has serious corrosion on the bridge. The refractory brick needs to be replaced when using 2 to 3 furnaces, The labor and material consumption of workers. If the cupola furnace melting large, it may also occur over the bridge leaking, causing accidents.