Lime Rotary Kiln
About the Lime Rotary Kiln
The rotary lime kiln, as the core equipment of the active lime production line, is widely used in metallurgy, building materials, chemical, and environmental protection industries. This equipment adopts advanced calcination technology, with high thermal efficiency, low fuel consumption, and stable operation. It can effectively improve lime activity and meet the needs of high-quality production in the industry.
Lime Rotary Kiln Structural Design
The lime kiln’s main structure consists of the kiln shell, supporting device, driving device, sealing device, combustion system, preheater, cooler, and PLC control system.
The Shell material is rolled alloy steel plate, with high strength and wear resistance. A driving device pushes the shell rotation by the gear. The sealing device reduces the losses due to heating and dust to improve the environmental friendliness.
Rotary Kiln for Lime Process Flow
The limestone rotary kiln’s process flow is divided into 3 steps: raw material preparation, calcination, and product formation.
The limestone needs to be crushed and filtered, achieving a particle size of 30-50 mm to ensure the CaCO3 is stable.
Crushed limestone is first put in a preheater, then fed into the rotary kiln. Due to the high temperature in the lime rotary kiln, a chemical reaction. Finally, the limestone is calcined and decomposed. When the lime kiln is operating, the materials roll and move uniformly within the kiln to improve heat transfer efficiency, ensuring uniform calcination and stable operation.
The calcination of limestone produces the highly active lime product through the cooling system.
Raw material preparation
High-temperature calcination
Product formation
Lime Rotary Kiln Specification
| Capacity (t/d) | 150 | 200 | 250 | 300 | 350 | 400 | 500 | 600 | 750 | 800 | 1000 | |
| Product | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | Active lime, Calcined dolomite | |
| Preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | Circular vertical preheater or polygonal vertical preheater | polygonal vertical preheater | polygonal vertical preheater | polygonal vertical preheater | |
| Rotary kiln | size（m） | Φ2.5×40 | Φ2.8×42 | Φ3×46 | Φ3.2×50 | Φ3.5×54 | Φ3.6×56 | Φ3.8×58 | Φ4×60/Φ4.2×50 | Φ4.3×58 | Φ4.3×64 | Φ4.8×68 |
| Effective volume (m³) | 142 | 190 | 235 | 292 | 390 | 430 | 505 | 575/548 | 670 | 738 | 1005 | |
| Temperature (℃) | 1350/1250 | 1350/1250 | 1350/1250 | 1350/1250 | 1350 | 1350 | 1350 | 1350 | 1350 | 1350 | 1350 | |
| Cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | Square vertical cooler | |
| Fuel | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | Gas, pulverized coal | |
| Heat rate (KJ/KgCaCO₃) | 5300/5000 | 5300/5000 | 5300/5000 | 5300/5000 | 5225 | 5225 | 5100 | 5100 | 4810 | 4810 | 4810 | |
Why Choose Our Lime Rotary Kiln
AGICO offers limestone rotary kilns with energy saving and environmental protection, stable operation, and long service life.
This kiln adopts an optimized combustion system and a high-efficiency thermal utilization Design to improve the fuel combustion efficiency, reducing energy consumption. Meanwhile, we also have an advanced dust removal and environmental protection system, which effectively reduces emissions of smoke and waste gases, achieving a more environmentally friendly rotary kiln for lime calcination production.
AGICO rotary lime kiln has a fully sealed calcining device, kiln head, and kiln tail, which uses the preheater and cooler to recover heat and reduce fuel consumption. Rotary kiln refractory lining is composed of multiple layers of refractory materials, which effectively modify the preheating effect and improve thermal efficiency. Compared with traditional shaft kilns, our rotary kiln significantly reduces fuel consumption and improves thermal efficiency.
During operation, the materials in the rotary kiln can roll uniformly within the kiln and be heated evenly. Its firing temperature and duration can be precisely controlled. Therefore, these factors make the limestone completely decomposed to improve the lime activity and ensure stable lime production. These highly active limestones have become an ideal choice for metallurgy, chemical processing, and environmental desulfurization applications.
AGICO CEMENT adopts high-quality refractory materials and wear-resistant structural design on the lime kiln, which effectively lowers equipment wear. Extends the key parts’ service life and reduces the maintenance cost and downtime.
our cases
Where It’s Used
The rotary lime kiln is widely used for metallurgy, building materials, and the chemical industry, mainly used for calcining limestone to produce high-reactive lime. Lime kiln also applies to flue gas desulfurization, environmental protection treatment, and other industrial calcination processes. It has become the main equipment for producing high-activity lime and carrying out calcination processing.
Building Materials Industry
In the building materials industry, the rotary kiln for lime is the core equipment for producing cement clinker. It calcines limestone, clay, and other raw materials to form silicate compounds.
Metallurgical Field
In the metallurgical field, it is used for purifying metal oxides such as zinc oxide and bauxite. The highly active lime produced is used in steel making, iron smelting, and the refining of non-ferrous metals.
Chemical Industry
In the chemical industry, AGICO CEMENT lime rotary kiln produces highly active lime, which plays an important role in the activation and processing of materials such as phosphate and titanium dioxide. It optimizes chemical reactions and enhances the performance of chemical products.