| Noun | 1. | steel mill - a factory where steel is made Bessemer converter - a refractory-lined furnace used to convert pig iron into steel by the Bessemer process blast furnace - a furnace for smelting of iron from iron oxide ores; combustion is intensified by a blast of air factory, manufactory, manufacturing plant, mill - a plant consisting of one or more buildings with facilities for manufacturing rolling mill - steel mill where metal is rolled into sheets and bars electric-arc furnace, Stassano furnace - an electric furnace in which an electric arc provides the source of heat for making steel |