β’ Ferrous metals : wrought iron, caste iron, steel β’ Nonferrous metals : tin, zinc, aluminum etc. IRON ORE β’ Naturally occurring mineral aggregate from which one or more valuable constituent may be recovered by certain treatment β’ Impurities present in iron ore are 1. Carbon 2. Manganese 3. Prosperous 4. Sulfur TYPES OF PIG IRON BESSEMER PIG β’ Obtained from hematite β’ Free from cu, P, S β’ Used in manufacture of steel GREY/FOUNDRY PIG β’ Raw materials burned at high temp β’ Soft variety β’ Used in manufacture of cast iron WHITE / FORGED PIG β’ Raw material Is burned at low temp β’ Hard &strong β’ Used in manufacture of wrought iron MOTTLED PIG β’ Lies between grey pig and white pig CAST IRON β’ 2 - 4 % carbon content β’ Made from remelting pig iron ( grey pig ) β’ Made in CUPOLA FURNACE β’ Impurities : Manganese, Phosphorus, Sulphur, Silica...