The document discusses various types of rolling mills used in the steel industry for reducing metal width and increasing hardness. It details four specific types: 4 high rolling mills, cluster rolling mills, continuous mills, and planetary rolling mills, each with unique characteristics and applications. These processes are energy-efficient, producing uniform products of higher quality.

1. Different Types of Rolling Mills

2. Rolling mills are used to reduce the width and increase the
hardness of the metal. They are often used in steel industries.
It is an energy efficient / energy saving process that produces
more uniform, lower fines and larger particles for product quality.

3. Four Types of Rolling Mills
 4 High Rolling Mill: 4 High rolling mill consists of four rolls. It is used to reduce
the material to a very small thickness. This produces a more consistent
thickness.
 Cluster Rolling Mill: It is a special type of four-high rolling mill in which each
of the two working rolls of small diameter is supported by two or more
backup rolls capable of rolling hard materials. In these mills can roll hardened
materials including titanium alloys and nickel alloys.
 Continuous mill: Mill consisting exclusively of a series of continuous rolls:
used in pulling a wire through which a roll is completed from one set of rolls
to the next.
 Planetary Rolling Mill: It consists of a pair of heavy backing rolls surrounded
by a large number of smaller planetary rolls. Its production is lower than the
continuous mills of many stands, but higher than those behind two-high or
three-high mill. This mill can be used to roll all metals, but is particularly
useful for those who have low ductility.

4. Thank You
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