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
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
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
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'
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;-
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'
Hope that helps,
Ted.
Bhaskar Agate