excess air in raw mill
we use a ball mill for raw material grinding with central discharge, the problem arises with the difference in volume flow of air at NTP between the inlet and the outlet, for eg at the inlet we have a volume flow of 33000Nm3/hr, the out let volume flow comes around to almost double this value around 70000Nm3/h. what is the reason for this sudden difference
here are some more details
inlet air first chamber= 330C, flow = 74000m3/hr=39000Nm3/hr
outlet = 88C, flow = 100000m3/h= 81000Nm/h
very less amount of air is entering through the second chamber,
opinion would be greatly appreciated
Know the answer to this question? Join the community and register for a free guest account to post a reply.
Re: excess air in raw mill
You have very huge amount of false air ,
the main source of it :
1-Center discharge seal.
2-Double flap of meal feed.
you have to check O2 at:
1-gas duct to mill inlet.
2-gas duct after mill (duct going to static separator)
3- After static separator.
By this way you can indentify where the air leakage.