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热风炉炉壳必须采取应力腐蚀保护措施,有二个原因,一是1350℃的拱顶温度,因为此温度正好是在炉壳表面上产生有害电解液的边沿温度,二是高炉炉役期内会出现使用1250℃以上鼓风温度的必要性。到目前为止,世界通常用到的炉壳保护措施,不是对炉壳外表面进行绝热保温以保持炉壳温度在电解液的露点以上,就是对炉壳内表面涂上抗酸涂料.炉壳外表面绝热。不同意采取炉壳外表面绝热方法的,提出了5条主要理由:(1)绝热会使炉壳温度升到酸的露点之上,这样势必使其用钢材的强度下降,也
There are two reasons for this. One is the vault temperature of 1350 ° C because this temperature happens to be the edge temperature at which harmful electrolytes are generated on the surface of the furnace shell and the other is the temperature of the blast furnace during its service There will be the need to use more than 1250 ℃ blast temperature. So far, the shell protection measures commonly used in the world are not to insulate the outer surface of the shell to maintain the shell temperature above the dew point of the electrolyte, that is, to apply an acid resistant coating to the inner surface of the shell. Surface insulation. Do not agree with the adiabatic method of the outer surface of the furnace shell, and put forward five main reasons: (1) Adiabatic furnace shell temperature will rise above the dew point of acid, it is bound to make it with steel strength decreased, also