Limestone Rotary Kiln

Production Capacity: 200t/d-1200t/d
Limestone Particle Size: 20mm-40mm
Lime Activity Degree: 360ml-400ml
Heat Consumption: About 1200kcal/kg
Fuel: Natural gas, coke oven gas, pulverized coal, calcium carbide furnace tail gas, and other fuels, etc.

Limestone Rotary Kiln for Sale

A limestone rotary kiln, also called a lime rotary kiln, is a kind of large-scale equipment in lime production, with a simple structure, mainly composed of three parts, which are preheater, rotary kiln, and cooler. The limestone is transformed into quicklime through the process of calcination at 1100±50°C high temperature. The activity degree of the finished product is effectively guaranteed at 360-400ml. AGICO’s limestone rotary kiln differs from previous limestone rotary kilns in that the technicians have optimized the calcination process according to the characteristics of the active lime product index. Equipped with a vertical preheater and vertical cooler, the limestone rotary kiln is capable of large-scale continuous operation and high efficiency, with a production capacity of 50-1200 t/d and a limestone feed size of 20-40 mm. The limestone rotary kiln has low energy consumption, with a heat consumption of about 1200 kcal/kg of lime. It is also highly adaptable to fuel types such as natural gas, coke oven gas, pulverized coal, and many others. Lime is used in a wide range of applications, so limestone rotary kilns are suitable for steel, construction, medical, food factories, metallurgical industries, etc. AGICO also produces different types of lime shaft kilns, including annular lime kilns, twin shaft lime kilns (pfr lime kilns), and double beam lime kilns. The solutions are customized according to the customer’s needs.

Advantages of Limestone Rotary Kiln

Lime rotary kiln adopts open calcination, the airflow is usually, the flue gas containing sulfur can be discharged in time, it is not easy to adhere to the product, so the product has low sulfur content and high activity.

Lime rotary kiln adopts dust collector and desulfurization equipment to effectively reduce the exhaust gas emissions generated in calcination and meet environmental protection standards. The kiln head is equipped with a vertical cooler, which can cool the high-temperature lime instantaneously and improve the activity of the lime.

The lime rotary kiln uses an automated system to adjust the temperature according to different combustion stages to avoid over-calcination or under-calcination. The combined scale seal is adopted to ensure that the air leakage coefficient in the kiln is less than 10%.

The design of the lime rotary kiln adopts counter-current calcination and graded combustion technology to make full use of heat energy, and the waste heat energy generated is used to preheat limestone and reduce energy consumption. lime rotary kiln can operate continuously on a large scale, with high efficiency and high output.

Limestone Rotary Kiln Working Principle

The limestone rotary kiln is mainly divided into three parts which are the preheater, rotary kiln, and cooler. The limestone is preheated in the preheater, calcined in the rotary kiln, and cooled in the cooler. As a heating device, the lime rotary kiln is machined from high-quality steel and the lime rotary kiln is added with high-quality refractory material.

Limestone from the silo through the downstream chute into the preheater, by the preheater and rotary kiln end of the high-temperature flue gas will be preheated to more than 800 ℃ limestone. At this time the limestone is decomposed by 30%, and the limestone will be pushed into the rotary kiln by a hydraulic rod for calcination. The exhaust gas enters the exhaust gas treatment system at the end of the kiln.

The preheated limestone is fed into the kiln by a chute for calcination. The kiln is inclined and rotated slowly at a temperature of 1000°C-1300°C to ensure that the limestone is completely decomposed to form quicklime.

The lime calcined by high temperature falls into the vertical cooler, the cooling air is blown in by the external fan, enters the wind cover through the wind chamber, contacts with the high-temperature lime clinker, and cools down the lime to the ambient temperature of +60℃ below the discharge of the vertical cooler. The hot air is sent into the rotary kiln for secondary combustion and utilization.

AGICO's Professional Services

Customized: Customized cost-effective solutions according to the customer's process, site, raw material, and fuel requirements.
Diversified Choices: AGICO not only produces limestone rotary kiln but also provides different models of lime shaft kiln.
Installation Service: AGICO sends professional technicians to guide the installation and commissioning of the limestone rotary kiln on site.
After-sales Service: AGICO provides regular equipment maintenance service and helps you solve problems at any time.

Limestone Rotary Kiln Customer Cases

Iran Quicklime Project
Address: Iran
Production Scale: 200t/d

Active Lime Production Line Project
Address: Shuozhou, Shanxi
Production Scale: annual output of 200,000 tons

Activated Lime Line Project
Address: Ningxia
Production Scale: annual output of 150,000 tons

Active Calcium Oxide Production Line
Address: Xiaoyi, Shanxi
Production Scale: annual output of 200,000 tons

Limestone Rotary Kiln Parameters

parameters of limestone rotary kiln
Capacity(t/d)		200	300	400	600	800	1000
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	Push Rod	6	8	10	12	16	18
Rotary Kiln	Size(m)	Φ2.8×42	Φ3.3×50	Φ3.6×56	Φ4×60	Φ4.3×66	Φ4.8×68
	Effective Volume(m³)	190	292	430	575	738	1005
	Rotating 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
	Power(Kw)	75	110	132	220	250	315
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
	Feed Temperature(℃)	1100±50℃	1100±50℃	1100±50℃	1100±50℃	1100±50℃	1100±50℃
	Discharge Temperature(℃)	<100℃	<100℃	<100℃	<100℃	<100℃	<100℃
System Heat Consumption(KJ/Kg)	5200	5200	5100	5000	5000	5000	5000
Lime Activity(50g,4NHCL,10MIN)	≥360-400ml	≥360-400ml	≥360-400ml	≥360-400ml	≥360-400ml	≥360-400ml	≥360-400ml