Iron and Coal Processing: Composition, Kiln Operation, and Sponge Iron Production, Slides of Metallurgy

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ALBERTUS SEPTYANTOKO 2712100014

COAL

• Fixed Carbon = 45 %
• Volatile Matter = 25-30 %
• Ash = 20 %
• Moisture = 8 % Chemical Composition
• Size = 3-20 mm Physical Composition

DOLOMITE

• MgO = 20 %
• CaO = 28 % min
• SiO2= 5 % max Chemical Composition
• Size = 2-6 mm Physical Composition

SECONDARY AIR

Secondary air is introduced axially in the direction of the gas flow The air supplied to the length of the kiln is metered for close control of temperature and gas atmosphere in the kiln Heating zone extends from 25% to 40% along length of the kiln and in the reduction zone

INJECTION COAL

Coal Crushing Combustion Injection to kiln Coal Injection over a large range of size 0-20 mm Temperature combustion below 950 C Coal injection system makes use of voal volatiles for reduction, thereby reducing the coal requirement to a minimum Coal Injection can decrease energy consumption

ROTARY KILN

ROTARY COOLER

The product come to the water cooled Where its temperature reaches to 80-100 C

SCREENING

• 10 mm 3 - 10 mm

• 3 mm

MAGNETIC SEPARATOR

• 10 mm 3 - 10 mm - 3 mm Mag. pulley Mag. separation Mag. separation

SPONGE IRON

• Fe (T)= 91,5 % min
• Fe (M) = 85,5 % min
• Sulphur = 0,005 %
• Phosphorus = 0,7 % Chemical Composition
• Size = - 3 to 10 mm
• Bulk density=1,7-2T/M Physical Composition

POST COMBUSTION CHUMBER

To maintain temperature in rotary Kiln Press particles in flame gas

ELECTRO STATIC PRECIPITATOR

Clean gas from WHRB. Gas is sent to stack Turbine cultivate steam to electricty generation