Re: Clinker Grindability

Dear Mr. Jain,

High F2O3 will render liquid less viscous which will result in fast nodulisation, rendering the core of the clinker nodule partial or almost unburnt. The finer Kiln feed will simply precipitate this scenario, overall increasing free lime this way too.

What i suggested is possibility which should be explored if it works then OK.

Regards,

Gulam Dastgir

Reply

Know the answer to this question? Join the community and register for a free guest account to post a reply.

Re: Clinker Grindability

Dear Shyam for detailed answer I need to know from you LSF and free lime content in clinker also. And it will be better to determine FeO content in your clinker and gas composition in your kiln inlet.                                                                                 In your modular characteristics I don't see any reasons for bad grindability. Alite content also not bad. 

If the termperature is more than 1200 in kiln inlet it may lead to C3S decomposation to C2S, free CaO and consequently, dusty condition in your kiln. The last one may lead to unnormal firing condition of your fuel, so will occur reducing condition in kiln environment, because of that the presence of fines + FeO + C2S may lead to slow grindability.

I can write these by summarizing the information you wrote. But if you write  what I need I can say the reason of the problem.

Explain also what are fifth stage divertor and Kiln feed residue is 12-14%? My system is four stage and I can't understand what are these. 

Regards, Davit

Reply

Re: Clinker Grindability

Dastgir:

 Alumina increase viscosity and decrease surface tension; both aspcts beneficial for better nodulisation.

Hello Gulam,

I think you meant to say "increase surface tension".

All else being equal, a higher alumina ratio will increase both viscosity and surface tension. Researchers have found that high surface tension of liquid phase promotes better nodulisation (Timaschev, "Proceedings International Congress on the Chemistry of Cement", Paris 1980.) Timachev reported a direct linear relationship between clinker nodule size and liquid phase surface tension.

So it is true to say that (up to a point) higher alumina ratio promotes better nodulisation.

Regards,

Ted.

Reply

Re: Clinker Grindability

Dear Ted,

Thanks for pinpointing mistake in writing.

One thing proving quite elusive for me is that how high viscosity improve upon nodulisation. The case with high surface tension is self explanatory to the point that such liquid inherently try to form nodules and in this case naturally entrap solid  particles to result in better nodulisation. Any such model, in case of viscosity, can anyone put forward.

To my opinion, high viscous liquid is more sticky and therefore easily got solid particles sticked to  and aided by surface tension, prove beneficial for nodulisation.

Am I right? Expert comments solicited. 

Regards,

Gulam Dastgir

Reply