Silastman,

What do you mean by "laboratory condition"?
And what do you mean by "decrease of energy consumption", and how did you measure it?
I can't see a way to reduce the decarbonatation energy by briquetting the raw mix.

Of course, the enthaply balance of the reaction  CaCO3 ==> CaO+CO2  can't be modified.
In an industrial kiln, compacting the raw mix could -at first sight- reduce the dust emission and their associated heat losses. However, heat transfer from the hot gases to the meal would be reduced and this would defeat the whole idea. Therefore raw meal compaction would have little if any application for clinker manufacturing.

This is, at least, my understanding that compaction can't improve the clinker burning heat balance.

lal

Dear lalbatros !

Becouse I make it only in laboratory. Enthaply I measuring by differential thermal analysis. Non pressed raw mix has 1774 kDj/mol - pressed 1583 kDj/mol. I have described and published some theoretical aspects of this process. I think, that pressing combined with calcination, not the best choice. In this case must be double pressing: pressing raw mix – grinding it to dust- calcination -hot pressing - burning up to clinker. I'm working on the direct burning  without   calcination in circular furnace  by rapid heating. I got the clinker in 1300, but the raw mixture requires adjustment.  

Silastman

Hey,

In general that is desired:

Calcine the material as uniform as possible

Burn calciner fuel efficiently

Shift the calcination from the rotary part (kiln) into the static part (calciner)

And Control Parameters:

§ Calcination temperature

 - Indication for the degree of calcination (LOI of hot meal)

§ Oxygen after calciner

 - Indication for the efficiency of combustion

Control Variables

§ Fuel rate to calciner

§ Calciner draft (ID fan, kiln orifice / tertiary air damper)

Calcination degree Set point = 90% - max. 95% calcination degree