The document discusses the problem of "snowman formation" in a cement kiln. Snowmen form under certain conditions: when there are large amounts of fines at the kiln outlet, when large clumps of clinker coating fall onto the cooler grates, or when there are high temperatures or liquid phases in the exiting clinker. Snowmen grow as fines fuse onto clumped clinker, forming stalagmite-like structures that can eventually block the kiln discharge. To remove snowmen, kiln cannons can be used or blasters can be installed at critical locations and programmed to periodically prevent snowmen from getting too large.

1. without changing the chemical
composition of clinker,raw mix & coal
mix
i am facing problem of snowman
formation.
a sample of snowman has
4.10 fe2o3,
22.7 sio2
5.5 al2o3
65.4 cao
0.9 mgo
0.5 k2o
49.7 c3s
27.8 c2s
27.1 liq
clinker litre weight 1150g/l

2. free lime 1.2
coal ash 10-11 %
coal mix 70 % petcoke & 30% indian
due to this i have inserted by burner pipe
inside by 800 mm
is there any other solution during running
what is the possible cause & remedy
raj

3. Mr.Ted has given the
following reply on the subject
as reply to subject query.
'Snowmen' can be formed
under the following
conditions ;-
1. A large amount of fines
are present at the kiln outlet.
2. Large lumps of clinker
coating fall from the kiln
onto the first grates of the
cooler.
3. High temperatures and/or
high amounts of liquid phase

4. is present in the clinker
exiting the kiln.
High temperatures and/or a
lot of liquid phase will cause
clinker to clump together on
the first grates of the cooler,
especially if there is little or
no movement there to stop
the agglomeration.
Fines then stick to the top
surfaces of these clumped
clinker. As layer after layer
of the fines fuse onto the
clump of clinker, a 'snowman'

5. will grow upwardly into a
stalagmite-like structure.
Sometimes, large lumps of
kiln coating may act as a base
for the formation of
'snowmen'. Left unchecked,
these 'snowmen' may
eventually grow to reach the
mouth of the kiln, and block
the discharge of clinker from
the kiln.
There are two methods for
removal of snowmen;-

6. 1. Shoot them out with a
kiln cannon.
or better still;
2. Install blasters at critical
locations and program them
to go off periodically,
preventing the
snowmen from getting big
enough to cause a problem.
The manufactures of some
new coolers claim to
incorporate special design
features to help minimise or
eliminate 'snowmen'

7. Hope that helps,
Ted.
Bhaskar Agate