re stage 3 cyclone coating

Hi,

Except oxygen issue what can be the source of problem? two much alkali removed from system by bypass?

Thnaks

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re stage 3 cyclone coating

Hello Fjalali,

In a way, yes.  As I said earlier, due to the high chloride content of your bypass dust, your bypass dust is removing mostly alkali chlorides. The remaining SO3 (uncombined with alkalis) is free to concentrate in the cyclones forming anhydrite and/or sulphospurrite.

If you were able to reduce the amount of chloride in the raw mix or decrease the total sulphur input, or both, you may be able to reduce or even prevent these buildups.

Regards,

Ted.

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re stage 3 cyclone coating

Sir,

  As such theres no co formation at the kiln inlet. we are keeping kiln inlet O2  of 4-5 % mainly to avoid any sulphur deposition. I doubt there is any issue of sulphur in the fuel also.

During the shut down we collected the sample of coating on the pre heater fan impeller while cleaning the impeller and the result is as follows.

LOI=18.10% ,SIO2 =13.27 %, AL2O3=7.11%, FE2O3=7.12%,CAO=35.49%, SO3=15.79%,

NA2O=0.216%, K2O=1.215 %, R2O=1.015%, CHLORIDES=0.5503 .I am interested to know is this normal.

Now after starting the kiln we are facing the problem of reduced output, Snowman formation, Calciner and riserduct coating formation and also frequent high free lime, As per the lab clinker analysis is within the target.And so we are clueless as to the reason for this abnormalities.

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