Double shaft kilns



Our kilns of the D.S.R. series are of the double shaft type, with round cross-section and equicurrent gas circulation; this type of kiln is absolutely similar, from a thermodynamic and technological point of view, to our D.S.S. kilns.

Their main peculiarity is the heat distribution system between one shaft and the other.

In these kilns, the passage of hot fumes from one shaft to another does not take place through a single channel, but through a circular channel with several ignitions. This feature makes it possible to optimise the distribution of heat throughout the cross-section of the shaft, avoiding the formation of cold or overheated zones.

Thanks to this particular shape it is therefore possible to obtain kilns with large productions or to fire small-sized limestone without reducing the quality of the lime produced or increasing consumption.


  • Low fuel consumption
  • High production consistency
  • Very reactive lime
  • Low L.O.I. value
  • Large lime production per kiln
  • Use of small limestone
  • Use of different fuels


Limestone size 20 ÷ 150 mm
Production 250 ÷ 700 Tonn CaO/D
Fuel gas / fuel oil / pulverized
Reactivity T60 ≤ 1,0 min (high reactivity)
≤ 2,5 min (medium reactivity)
Consumo Elettrico 20 ÷ 35 kWh / Tonn CaO
Electricity Consumption < 850 Kcal / Kg. CaO
L.O.I. <1,5 %

Società Impianti Calce S.r.l 

Via San Francesco D'Assisi 49/51
20073 - Opera (MI) Italy
+39 02 5760 4767

Managing Director

Sales & Marketing

Engineering & Projects

Finance & Administration

SIC LIME Pvt Ltd India

Room 1402 - 14th floor
Sidco Global Tower-CN-8/2
Sector 5 - Salt Lake City
700091 Kolkata - India
+91 877 783 4067

Società Impianti Calce S.r.l  e SIC Lime Pvt India | P.I. IT07583530154 | t. +39 02 5760 4767