What is the difference between a primary steel and a secondary .Well, Let Share Something Interesting Steel-making is the process for producing steel from iron ore and scrap. In steel-making, impurities such as . Electric arc furnace steel-making is the manufacture of steel from scrap or direct reduced iron melted by electric arcs. In an electric arc furnace, a batch of steel.metal ore secondary manifacture,Support for primary and secondary metals - OECDNov 9, 2017 . Relative energy and carbon intensity of primary and secondary metal production ..... 38 .. Metallic mineral ores constitute one fifth of global raw-material consumption. They are the ... manganese, nickel, and zinc used to manufacture steel, aluminium, and copper are central inputs in almost all major.