18 PROjECT PRIDE
low there shouldn’t be any water spray requirement
on table.- Mill internal design/system design: It was
discussed with all grinding OEMs to design the
mill internals in such a way that it operates with
better potential capacity, minimum pressure drop,
minimum heat, and power consumption. We had
detailed discussion on the internals given below
because it was learnt from group plants and
across industry that people modify or upgrade the
equipment mentioned below after few years of
operation. If suppliers do these improvements in
advance, we can have advantages of these from day
one and no capex requirement in future on account
of these upgradations.
VRM Option
In case of Vertical Roller Mill (VRM) option we had
the following discussions and design developments with
supplier which could benefit them for future proposals too:- Mill table RPM to be as max as possible: A mill with
maximum table RPM increases the table acceleration
which enables mill to have higher feed on table with
same motor load as retention time is reduced hence
increases the potential. Based on detailed discussion,
Pfeiffer has increased its table speed from 23.1 to 25.9
RPM as earlier they had offered mill with least table
RPM among other suppliers