600 T/D active lime production capacity
Efficient limestone preheating and calcination
Complete rotary kiln production line solution
Stable cooling, conveying, and storage system
Zhenggang Machinery designed a complete 600 T/D active lime rotary kiln production line based on the customer’s limestone characteristics and production requirements. The process starts with 20–40mm limestone feeding, followed by belt conveying, screening, raw material storage, preheating, pre-decomposition, rotary kiln calcination, cooling, bucket elevator conveying, and finished product classification. The preheater uses high-temperature flue gas from the rotary kiln to heat limestone to 600–800°C before calcination, improving thermal efficiency and supporting stable active lime production.
Limestone resource, particle size, and site layout evaluation
600 T/D active lime rotary kiln process design
Rotary kiln, cooler, conveyor, screening, and silo installation
Operator training, kiln operation guidance, and maintenance support
The project followed a structured implementation plan covering limestone resource assessment, technical process comparison, equipment configuration, manufacturing, installation, commissioning, and operator training. Zhenggang Machinery’s technical team focused on building a stable 600 T/D lime rotary kiln production line that could support efficient limestone calcination, smooth material flow, and long-term active lime production.
After commissioning, the active lime rotary kiln production line achieved stable 600 T/D production performance and supported the customer’s annual output target of approximately 200,000 tons. The optimized process improved limestone preheating, calcination stability, cooling efficiency, and finished lime classification. By integrating feeding, screening, rotary kiln calcination, cooling, bucket elevator conveying, and silo storage, the project helped the customer achieve reliable continuous production and better active lime product consistency.
| Metric | Before | After | Improvement |
|---|---|---|---|
| Daily Production Capacity (T/D) | 450 | 600 | 33 |
| Energy Consumption Index | 100 | 82 | -18 |
| Monthly Downtime (%) | 14 | 9 | -35 |
| Finished Lime Cooling Temperature (°C) | 100 | 65 | -35 |
Achieved stable 600 T/D active lime output
Supported 200,000 tons annual production target
Improved limestone preheating before calcination
Enhanced rotary kiln calcination efficiency
Cooled finished lime to about 65°C
Enabled classified storage of finished lime
“Zhenggang Machinery provided a reliable active lime rotary kiln production line that matched our limestone resources and production target. The process design helped us improve limestone calcination, stabilize daily output, and achieve smoother finished lime cooling, conveying, and storage.
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