Product Description
A Lime Calcining System Built Around Real Feed Conditions
A lime rotary kiln continuously converts prepared limestone into burnt lime. AGICO CEMENT plans the kiln together with feeding, preheating, firing, cooling, exhaust-gas cleaning, and product handling. Kiln diameter, length, speed, refractory zoning, and auxiliaries are confirmed from limestone chemistry, size distribution, required output, fuel properties, target lime quality, and site conditions rather than selected from one universal specification.
Product Advantages
Why Choose Us?
Feed-Specific Design
AGICO's lime rotary kiln configuration starts with the stone analysis and size distribution so the feeding, preheating, and calcining arrangement follows the real raw material.
Integrated Heat Use
The lime calcining system of AGICO CEMENT coordinates the preheater, kiln, and cooler so recoverable process heat can be returned to the thermal circuit.
Controlled Material Travel
AGICO's drive and support arrangement is engineered around shell dimensions, operating load, and the residence conditions required by the selected feed.
Defined Plant Interfaces
The lime rotary kiln of AGICO CEMENT is planned with seals, combustion, gas handling, civil interfaces, and maintenance access rather than treated as an isolated shell.
Working Process
From Prepared Limestone to Cooled Burnt Lime
Controlled Feeding
Sized limestone enters storage and a regulated feed route that supports stable material flow.
Preheating
Where selected, hot kiln exhaust transfers heat to the stone before it enters the rotating shell.
Rotary Calcination
Rotation advances the material through the heated zone while calcium carbonate decomposes into calcium oxide and carbon dioxide.
Cooling and Heat Return
The cooler removes product heat and can return warmed combustion air to the firing system.
Plant Configuration
that's our services
The final plant arrangement is built from four coordinated systems, each checked against the project material plan and operating conditions.
Feed and Preheater
Crushing, screening, storage, and preheater selection follow the stone-size distribution, moisture, and required throughput.
Burner and Gas Flow
Fuel analysis, flame requirements, draft, and process control determine the burner and combustion arrangement.
Shell Support and Drive
Shell, tyres, rollers, drive, seals, and thrust control are sized as one rotating mechanical assembly.
Cooling and Gas Cleaning
Cooler, induced-draft fan, dust collector, conveyors, and storage equipment are matched to calculated material and gas loads.
Applications
Our latest projects
Lime production scenarios must be reviewed against feed chemistry, target product quality, operating schedule, fuel, and the interfaces of the complete calcining plant.
High-Calcium Lime Production
A project configuration for prepared high-calcium limestone after feed chemistry and target product quality are confirmed.
Dolomitic Feed Projects
A separately reviewed thermal arrangement for dolomitic stone; operating decisions are not copied from high-calcium feed.
Integrated Plant Upgrades
A kiln package coordinated with existing crushing, product handling, utilities, gas cleaning, and site constraints.
Related Spare Parts
Inputs That Define the Final Lime Kiln
Daily output and operating schedule
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Limestone chemistry and moisture
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Feed-size distribution
3
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Target lime quality
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Fuel analysis and local utilities
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Emission limits and site layout
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Technical Parameters
The following figures are published Metso preheater-kiln market reference data. They describe Metso systems and are not an AGICO specification.
| Selection Item | Published Metso Market Reference | Why It Matters |
| System capacity | 250–1,250 t/day | Defines the preliminary production scale and material-flow basis. |
| Limestone feed size | 6–75 mm | Influences heat transfer, residence time, and feed preparation. |
| Largest-to-smallest stone ratio | 4:1–6:1 | A controlled size range supports more uniform calcination. |
| Product residual CO₂ | 0.1–3% | Indicates the required degree of calcination and lime quality. |
| Specific fuel consumption | 1,070–1,200 kcal/kg | Provides a preliminary thermal-efficiency comparison point. |
| Electrical energy | 20–40 kWh per calciner | Supports an early utility and operating-cost review. |
| Published fuel options | Gas, coke, oil, coal, coke-oven gas | Fuel properties affect burner selection and gas-flow design. |
| Rectangular preheater modules | 6–10 modules | Module count is related to capacity and available layout. |
| Rectangular preheater capacity | 300–700 t/day | Provides a reference range for a two-row arrangement. |
| Polygon preheater modules | 10–22 modules | More modules can serve larger production requirements. |
| Polygon preheater capacity | 600–1,200 t/day | Provides a reference range for a polygon arrangement. |
| Nominal CO₂ released in preheater | 10–20% of limestone-feed CO₂ | Shows how much calcination may begin before the kiln. |
| Cooler heat-recovery efficiency | More than 90% | Recovered heat can preheat secondary combustion air. |
The above data is provided for preliminary reference only. Actual plant capacity, mixer configuration, storage volume, power demand, discharge height, control functions, and overall dimensions must be confirmed according to your concrete recipes, site conditions, utilities, operating schedule, and specific project requirements.
FAQ
What limestone information is required before selecting a lime rotary kiln?
Provide chemical analysis, moisture, bulk density, feed-size distribution, decrepitation behavior, required output, and the target lime quality.
Can the same kiln configuration process high-calcium and dolomitic limestone?
Not automatically. Different decomposition behavior and quality targets require separate thermal, residence-time, and material-handling reviews.
When should a preheater be included in the lime calcining line?
Its suitability depends on stone size, capacity, fuel economics, heat-recovery goals, layout, and the behavior of the selected limestone.
Which fuel types can be considered for a lime rotary kiln?
Gas, pulverized coal, oil, coke-oven gas, and other suitable fuels may be evaluated after composition and availability are confirmed.
