The optimum position depends on many factors. In the past, it was common practice to point the burner a little bit down compared to kiln axis, in direction of the charge.This was primarily done to compensate the tendency of the flame to go upward due to convection and entrainement by the secondary air. Today, with modern high momentum burners, ...

I concur with the last statement of Mr. Hussaini comment. This is not the ash content that has relevant effect on the preheater exit temperature, it is the amount of combustion gases relative to the lower heat value of the coal. In order to calculate this, you should have a complete elemental analysis (CHONS analysis) of your coal + a measure of ...

Ted Krapkat:This combined stream is what is fed to the preheater,   This is exactly what I meant. As it is generally the combined stream of return dust and fresh meal that is generally fed to the kiln, the reading you get on your kiln feed weightfeeder will be higher than what the Peray equation gives. This is why I prefer to make a clear ...

subtracting Ash in clinker form g we get Amount of feed required to produce on kilogram of clinker For me, not exactly. Subtracting Ash in clinker from g, you get the amount of meal required to produce a kilogram of clinker and this is not equal to the amount of feed. To get the feed, you need to add the amount of dust that is leaving the top ...

Direction of rotation is free, but some auxiliary equipment must be adapted to the direction of rotation. I mainly think of - lifting and classifying liners in ball mills - position of clinker cooler (lateral offset between cooler median line and kiln center line) to center the chute of the clinker. Best regards

This question was already abundantly debated in this forum.  For example here: http://www.cemnet.com/cs/forums/thread/1654.aspx  or here: http://www.cemnet.com/cs/forums/thread/3396.aspx   Best regards,  

In addition to the remarks of Dr. Clark, as combustion product volume is higher, heat losses by the flue gas at top of preheater are also higher, which means heat consumption of the kiln will also be slightly higher.

I think it MAY be Union Brige cement plant in the US. Single string 5 stage preheater kiln with calciner supplied by Polysius. Design capacity is 5500 tpd. Best regards

In principle, there are solutions for these refractories problem (radiation from the flame will subject the refractories to even higher temperatures anyway) Practically, the average secondary air temperature in stable conditions will be limited by clinker cooler and kiln technology. Modern clinker cooler have better recuperation efficiency, that ...

The main (process) design parameters are - retention time - volume loading - gas velocity  Gas velocity should be lower than 12-13m/s at kiln inlet Other parameters already discussed in this thread: http://www.cemnet.com/cs/forums/thread/3183.aspx best regards