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Electric Arc Furnace vs Blast Furnace
12
Transcript
Electric Arc Furnace Basics
How It Works
EAF Basics
- Iron ore + limestone + coke
- Formation of Carbon Dioxyde
- O2 + C= CO2 + heat
- Decomposing limestone
- CaCo3 -> CaO + CO2
- Formation of Carbon Monoxide
- CO2 + C -> 2CO
- Reduction of Iron Oxide
- 3CO + Fe2O3 -> 2Fe + 3CO2
- Used for long products
- Scrap/DRI/Pig Iron
- Alternating or Direct current
- Heat generation through electric arc
- Graphite - best conductor available
- Oxygen and carbon injections
- Slag formers injection
- Tapping
Blast Furnace
Pros & Cons
What Is a Furnace?
Pros
- Less energy required
- Flexibility
Cons
- Noise
- Slag production
- Electricity consumption
- Direct fired heater
- Create chemical reactions through heat
- Various technologies
- Puddling Furnace
- Electric Arc Furnace
- Blast Furnace
- Reverberatory Furnace
Pros & Cons
Pros
- Rapid process
- High quality iron production
- Slag separation
Cons
- Highly poluting
- Expensive to run
batch vs continuous
Electric Arc Furnace vs Blast Furnace
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