与冲天炉熔炼相比，工频炉熔炼可能遇到的问题是：（１）熔化在氧化气氛中进行，当过热时间长时，会发生脱碳，影响铁液的白口倾向。（２）高温铁液长时间与炉衬接触会导致炉衬中ＳｉＯ２，被还原出Ｓｉ，后者进入铁液，提高其含Ｓｉ量而减弱冷铁的白口倾向。（３）铁液过热时 Compared with cupola smelting, frequency furnace smelting problems that may be encountered are: (1) melting in an oxidizing atmosphere, when the overheating time is long, decarburization occurs, affecting the white tendency of molten iron. (2) The high temperature molten iron contact with the lining for a long time will cause SiO2 in the lining to be reduced to Si, and the latter enters the molten iron to increase the Si content and weaken the whiteness tendency of the cold iron. (3) hot metal overheating