Dear sir!
We've 4.7m×74m kiln with 6 stage double string preheater & ILC .
We are facing two major problems
(1) she'll temp remaind high (400c+) from 0m to 12 m (burning zone),with "no coating " in this area.
(2) Our DOC (both sixth stages) remain 99%,with normal preheater pressures (PC temp kept 880c).
Note! We are using south African coal with Ash content (21~25%),
Kiln feed LSF (105~107%)
Clinker LSF. (91~92%).
Please share your valuable experiance & guidelines.
Regards,
S.jadoon