high ph outlet temp.
we have unax cooler kiln with 1100-1150 tpd clinker.
after a shutdown stoppage the ph o/l temp. has increased by 10 deg. previously 395-400 deg but now 405-410 deg.
oxygen , coal, feed are same & also tph is same.
when tried by increasing feed but temp. further increased.
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Re: high ph outlet temp.
One reason for this high T is the PH top feed divertor, that has some material leackage. This will cause some feed to return to raw meal silo and hence your top temp will go higher side. You observe it and fix some stopper plate towards recirculation side.
Have a nice day