I would like to have the formula that you have used as well.

Can u give an estimate of residence time of material in a new 5 stage precalciner kiln with 2 peir support?

I have different formulas and numbers from references.

Thx

Please see the attached file to know the formula for calculating kiln feed retetion time inside in a rotary kiln.

Regards,

Raj Sahu

Thanks.

I got the same furmula from another source in ft:

T (min) = 11.4 L (ft) / (Speed (RPH) x Dia (ft) x Slope (ft/ft))

Regards.