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Technical Cement Forum / Corelation between burner and clinker quality/strength or raw mix design

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Ramesh Aital 25/01/2015 10:18:56

Corelation between burner and clinker quality/strength or raw mix design

Can anybody suggest is there any corelation between burner flame with respect to clinker quality and strength, please reply to below query.

We have conventional single channel burner with flame momentum around 1050% m/s, clinker nodulization is good, burning zone temp is OK and clinker liter wt maintained 1200 to 1300,and clinker loss is 0.5 to 1%despite of the above clinker strength is not attractive, when oneday strength is high, later strength will be low and vice versa.

My question is the above problem is due to either improper rawmix design or problem with burner flame please suggest.

Regards,

Ramesh Aital

Ted Krapkat 28/01/2015 03:50:03

Hello Ramesh,

Firstly, what's your clinker chemistry. In particular free lime, C3S, C2S, C3A and alkali sulphates?

Secondly, yes the burner flame can have a big impact on clinker reactivity. Over-burning causes a loss of hydraulic reactivity of the clinker minerals while under-burning results in unreacted free lime and less clinker minerals available for hydration. Clinkerisation should happen quickly and completely in the burning zone but clinker should not spend too long at maximum temperature, so a short, sharp, hot flame is the ideal burning zone scenario.

Regards,

Ted.

TENDULKAR 10/02/2015 11:20:59

what is hydralic reactivity TRED KRAPKAT

Ted Krapkat 11/02/2015 01:38:30

Hello Trendulkar,

The hydraulic reactivity of a clinker mineral is the rate at which it reacts with water to form various hydrated compounds . (See http://iti.northwestern.edu/cement/monograph/Monograph5_3.html)

Regards,

Ted.

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