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SUMMARY ③ Korea Iron & Steel Association

Iron ore becomes steel

How do you take ore that is buried in the mine and create a steel product? Let's take a look at the process by which steel is
made at an integrated mill. Steelmaking process
The first batch of molten iron harbors
impurities, such as carbon, phosphorus,
Storage of raw materials sulfur, and silicon. When used as-is, the
resulting product is brittle and difficult
The process brings iron ore to process. Therefore, the batch is
and bituminous coal mined
transferred to a converter, where the
from Australia and Brazil by
molten iron is put through the process
boat. Then, they are stored.
of blown pure oxygen to filter out
unnecessary ingredients in order to
Product manufacturing and shipment
produce steel.
Ironmaking process Steel products are delivered to their final
destinations by train, ship, or truck.
It is a process of making molten iron
by feeding into the furnace small
pieces of iron ore (sintered ore) and
coke that have been pre-treated
Rolling
through ‘sintering’ and ‘coking.’
When air heated to 1,200℃ is blown It is a process by which slabs, blooms,
into the bottom of the furnace, coke, billets, and other semi-products
Pre-treatment of Raw Materials which acts as the fuel, is oxidized produced by continuous casting
by the heat. At this time, the coke process are passed between several
Sintering generates carbon monoxide, which Continuous casting process rotating rolls.
Through this process, the varying components removes the oxygen attached to iron Just like kneading dough with a rolling
of the iron ore are made more consistent and the ore. Through this chain of chemical This is the process of placing pin, force is applied continuously
ore is shaped into sizes more appropriate to feed reactions, iron ore becomes ‘molten liquid molten steel in molds. Then, to generate thin and long steel plates.
into the furnace. The outcome of this process is iron,’ which flows out of the furnace. it is cooled to make semi-finished
called ‘sintered ore.’ products, such as slabs, blooms, and
billets. Here, the slab is put through
Coking
a ‘thick plate mill’ to become thick
This is the process of heating coal
plates, or into a ‘hot rolling mill’ to
to around 1,000℃ to create solid fuel.
make hot-rolled steel plates.
Coke acts as a reducing agent that melts raw
A piece of A piece of
materials in a furnace and separates oxygen
knowledge knowledge
from iron ore.
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