1000 mm to 200 mm. This will be
followed by a crushing plant, also to
be delivered by Hazemag, with
HRS 2426 roller screens and 1430
impact crushers to achieve a
product size of -40 mm. The
capacity of this new installation
is 2500 tph (Figure 5). It is
scheduled to be commissioned in
summer 2017.
When it comes to higher surface
moisture of 5 – 10%, Hazemag
hammer mills are chosen instead of
impact crushers. Since the mid-80s,
six Hazemag HUV 1600/2000
hammer mills have each been
producing 1300 tph of lignite at
-40 mm in Turkish power plants:
Kemerköy, Yatagan and Yeniköy.
However, the widest range of
applications of Hazemag HUV,
HUM and HNM hammer mills is
in grinding coal or other materials to
a product range between 95% from
-10 mm to -0.3 mm (Figure 6). The
top size is achieved either by
integrated grates or by running the
hammer mill in closed circuit with an
external screen or a dynamic air
separator.
Moreover, hot gases from a hot gas
generator or another thermal process
can be introduced into the hammer
mill for simultaneously grinding and
drying. In this case, the safety
concept of the total plant dealing
with dried fine coal is of particular
importance.
Figure 6. Product range of Hazemag hammer mills
.
Figure 5. Hazemag coal crushing plant for 2500 tph coal.
52
|
World Coal
|
January 2016
