72 posts
TimePosted 04/06/2014 08:59:13
Nael says

re bolder formation


Do you have thick coating and ring in your kiln? Usually clinker balls initiate and grow behind a thick build up or ring. Build up often fall and slide into the kiln as large slabs and coming behind the ring forming a ball which can then grow larger and larger due to accretion. In this case yes; increasing the kiln speed may help you.





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1 posts
TimePosted 23/12/2014 03:40:31
jun says

re bolder formation

Hello Ted,

For LP@1450 range of 23-28%, the formula is 3.0A+2.25F+Mgo+Na2O+K2O. Some include SO3 in the equation. Can you please refresh me the inclusion of these trace elements in the liquid phase.

Thanks a lot,



Ted Krapkat
537 posts
TimePosted 24/12/2014 02:01:28

re bolder formation

Hello Jun,

Yes, the liquid phase formula includes MgO, K2O, Na2O and also SO3. This is because these elements all contribute to the quantity of liquid phase .

MgO can only contribute to the liquid phase up to a value of ~2% in the clinker, and therefore should only be used in the equation up to a maximum of 2%. (Above 2% MgO occurs as solid crystalline MgO, or periclase.)

K2O, Na2O and SO3 combine in the kiln to form K2SO4 and Na2SO4. These alkali sulphates have a comparatively low melting point and form a separate liquid phase which is immicible with the normal aluminate/ferrite liquid phase. Even so, the alkali sulphates contribute to the overall quantity of the melt phase and so act to facilitate clinkerisation and nodule formation.

I hope this helps...