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Iron Production

Iron Production. Ore, lime, coke. Waste gas. Hot air. Slag out. Molten iron out. 800. 700. 600. 500. 400. 300. 200. 100. 1994. 1995. 1996. 1997. 1998. 1999. 2000. 2001. HRC. Low carbon wire rod. Price of Iron and Steel. Export prices (c&f) US$/t. 2002. 2003. 2004. 2005.

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Iron Production

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  1. Iron Production Ore, lime, coke Waste gas Hot air Slag out Molten iron out

  2. 800 700 600 500 400 300 200 100 1994 1995 1996 1997 1998 1999 2000 2001 HRC Low carbon wire rod Price of Iron and Steel Export prices (c&f) US$/t 2002 2003 2004 2005 2006 2007

  3. Ironmaking in the Blast Furnace Plant Bell Less Top Sinter Coke Gas Cleaning Hot Blast Stoves Stock House Gasholder Scrubber Enrichment Gas Slag, Hot Metal Combustion Air Blower Combustion Gas

  4. Materials Hematite Fe2O3 Limonite Fe2O3. xH2O Magnetite Fe3O4 Siderite FeCO3 Iron Ore Fe content : 20 - 70% SiO2 Al2O3 CaO MgO P, As S - unwanted, less than 0,15% Flux Lime, dolomite CaMgCO3 , CaO Coke Metallurgical coke

  5. Preparing processes Ore Coal COKE OVEN PLANT SINTER PLANT Gas Coke production Sintering • high-quality coal • without oxygen • 900 – 1150°C • 12 – 24 hn

  6. Preparing processes Hot Blast Stoves Combustion Air Blower Combustion Gas Preparation of hot air • fire-clay lattices is heated up to 1200°C • cold air is introduced and heated up to 600-1100°C

  7. Blast Furnace Top Gas Mains Top Bins Throat Armour Above Burden Probe Temperature Probe Refractory Lining Sub Burden Probe Bustle Main Tuyeres Hearth Refractories

  8. Main reactions in blast furnace

  9. Bilance výroby Koks Vápenec Ruda (50%Fe) 0,35 - 0,6t 0,4t ~2t Vysoká pec 3.5 t plynu 1t surového železa

  10. Products Chemical composition Pig Iron

  11. Products Pig Iron is being casted to: TORPEDO LADLE ingot

  12. Products Chemical composition Slags • bazic • (CaO + MgO)/SiO2 = 1,0 – 1,5

  13. Products Chemical composition Stock gas • fly ash ( 3 -30g/m3) • 3800 - 4000m3 gas per 1t of coke • fuel value 3700 – 4200 kJ/m3

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