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

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Presentation on theme: "Iron Production Ore, lime, coke Waste gas Hot air Slag out Molten iron out."— Presentation transcript:

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

2 Price of Iron and Steel HRCLow carbon wire rod Export prices (c&f) US$/t

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

4 Material s Hematite Fe 2 O 3 Magnetite Fe 3 O 4 Limonite Fe 2 O 3. xH 2 O Siderite FeCO 3 IronOre Fe content : % SiO 2 Al 2 O 3 CaOMgO S - unwanted, less than 0,15% P, As Flux Lime, dolomite CaMgCO 3, CaO Coke Metallurgical coke

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

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

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

8 Main reactions in blast furnace

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

10 Products Pig Iron FeCSiMnPS 90-95%3,0-4,3% 0,5-3,0% 0,05-2%do 0,1% Chemical composition

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

12 Slags SiO 2 CaOAl 2 O 3 MgO, MnO, FeO, CaS, MnS, P 2 O 5, BaS, atd %36-48% 10-20% negligible Chemical composition - bazic (CaO + MgO)/SiO 2 = 1,0 – 1,5

13 Products Stock gas Chemical composition - fly ash ( g/m 3 ) m 3 gas per 1t of coke - fuel value 3700 – 4200 kJ/m 3 CO 2 COH2H2 CH 4 N2N2 8-14%23-32% 1-4% 0,2- 0,4% 55-60%


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