我厂的铸造车间,铸件全年产量约400t,熔化设备只有一座5t/h两排风口冷风冲天炉,每炉次的化铁量35～45t。以前,我厂后炉、前炉与铁水包的修筑材料,主要是用耐火砖末或石英砂与耐火粘与土混制的。当化铁量超过45 t以后,由于熔化带被侵蚀,直径扩大,后炉的预热带常发生耐火 I plant the foundry, cast annual output of about 400t, melting equipment is only a 5t / h two rows of cold air cupola furnace, per kilogram of iron content of 35 ~ 45t. Previously, I plant after furnace, furnace and ladle before the construction materials, mainly refractory brick or quartz sand and refractory clay and soil mixed system. When the amount of iron over 45 t later, as the melting zone is eroded, the diameter of the furnace after the preheating zone often fire-resistant