The document summarizes the process of smelting iron from iron ore in a blast furnace. Key points include: 1. Iron ore, coke, and limestone are charged into the top of the blast furnace. Hot air is blown into the bottom to support combustion. 2. Chemical reactions reduce the iron and melt it, while the limestone forms a slag that separates the iron from impurities. 3. Molten pig iron and slag are tapped off the bottom of the furnace periodically. Pig iron contains 3-4% carbon and other elements picked up during the smelting process.

1. SMELTING OF IRON

4. General view of Blast Furnace plant

5. Sketch of Blast Furnace Plant

6. Sketch of Blast Furnace

9. Blast furnace diagram 1. Hot blast from Cowper stoves 2. Melting zone ( bosh ) 3. Reduction zone of ferrous oxide ( barrel ) 4. Reduction zone of ferric oxide ( stack ) 5. Pre-heating zone ( throat ) 6. Feed of ore , limestone , and coke 7. Exhaust gases 8. Column of ore, coke and limestone 9. Removal of slag 10. Tapping of molten pig iron 11. Collection of waste gases

16. Charging Mechanism in Blast Furnace

23. Tapping of Slag

26. Thanks