Lime Kiln

Rotary Kiln is commonly used in calcination of limestones to produce high active lime used in metallurgy industry. Despite the higher initial investment, rotary kilns still provide a competitive option in limestone calcining process against shaft kilns.

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Wide output range: from 50t/d to 2000t/d, very suitable for large scale lime calcination plant.

High quality lime: consistent quality with activity value from 340ml up to 400ml(30ml higher than shaft kiln on average), low sulfur content and minimum over-burned/underburned lime due to good ventilation and the dynamic calcination process. it is suitable for production of high quality lime used in steel plants.

Rotary lime kiln could process small sized limestones ranging from 10mm to 50mm. Regular mines would produce a high proportion(30-40%) of limestones less than 30mm, which shaft kilns could not process and would normally go to waste.

It could achieve reasonable thermal efficiency with installation of lime preheater, which utilise the high temperature exhaust gas from the rotary kiln to preheat the limestone and save energy. flue gas temperate from the preheater is between 280℃ to 350℃.

Lime Calcination Flowchart (Rotary Kiln)

Typical Technical Data:

Capacity(T/D)		200	300	400	600	800	1000
Product		active lime	active lime	active lime	active lime	active lime	active lime
Preheater	Model	RS-6.5×3.4	RS-7.5×3.4	RS-8.5×3.4	RS-10.4×3.4	RS-10.8×3.4	RS-13.5×4
Preheater	Pushing head	6 pcs	8 pcs	10 pcs	12 pcs	16 pcs	18 pcs
Rotary Kiln	Model	φ2.8×42m	φ3.3×50m	φ3.6×56m	φ4×60m	φ4.3×66m	φ4.8×68m
	Volume(m3)	190	292	430	575	738	1005
	Speed（r/min）	0.45-2.22	0.2-1.9	0.22-1.57	0.48-1.57	0.21-1.57	0.19-1.98
Cooler	Model	LS-3×3	LS-3.6×3.6	LS-3.8×3.8	LS-4.1×4.1	LS-4.7×4.7	LS-5.2×5.2
	Inlet Temp.	1100±50°C	1100±50°C	1100±50°C	1100±50°C	1100±50°C	1100±50°C
	Outlet Temp.	＜100°C	＜100°C	＜100°C	＜100°C	＜100°C	＜100°C
Heat consumption(KJ/Kg)		5200	5200	5100	5000	5000	4750
Lime Activity		≥360ML	≥360ML	≥360ML	≥360ML	≥360ML	≥360ML
(50g,4NHCL,10MIN)		≥360ML	≥360ML	≥360ML	≥360ML	≥360ML	≥360ML

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Lime Kiln

Benefits of Rotary Lime Kiln

Wide output range: from 50t/d to 2000t/d, very suitable for large scale lime calcination plant.

Rotary lime kiln could process small sized limestones ranging from 10mm to 50mm. Regular mines would produce a high proportion(30-40%) of limestones less than 30mm, which shaft kilns could not process and would normally go to waste.

It could achieve reasonable thermal efficiency with installation of lime preheater, which utilise the high temperature exhaust gas from the rotary kiln to preheat the limestone and save energy. flue gas temperate from the preheater is between 280℃ to 350℃.

Lime Calcination Flowchart (Rotary Kiln)

Typical Technical Data:

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