A detailed description of the design features of an AC (alternative current) ELECTRIC ARC FURNACE (EAF) which is commonly used in the electric steelmaking processes.
9. 9 Copyright – P4S – PRODUCTS 4 STEELMAKING – All Rights Reserved – Author: Eng. Matteo Sporchia
ELECTRIC ARC FURNACE AC (PT 1) – Layout & Components
1.5 OPENING AREAS
Delta refractory roof is equipped with three opening areas where the graphite electrode
columns can go inside the furnace. Another hole (called "fourth hole") is used for the
extraction of the furnace fumes (suction system). An additional hole (called "fifth hole")
may be provided for other operations such as the continuous feeding of DRI and HBI or
injections of coal and lime. The sidewall of the furnace is equipped with a slag door for
slag removal operations and also for additional operations such as the using of manual
oxygen lances. In the side tapping EAF a tapping spout is installed at the sidewall of the
furnace while in the bottom tapping EAF an EBT system (tap hole) is installed at the
bottom part. Other several ports could be installed around the furnace shell to be
equipped with burners. Opening areas may also be provided low in the furnace sidewall
for injection of oxygen, lime or carbon.