Henan Hongke Heavy Machinery Co., Ltd. is pleased to provide an update on our Φ2.2×42m lime rotary kiln project in Mongolia, designed for 50 tons per day of high-quality quicklime production. This project demonstrates our expertise in delivering small-to-medium capacity lime calcination solutions for emerging markets.
Project Background: Lime Demand in Mongolia
Mongolia's industrial sector has been growing steadily, creating significant demand for active lime across multiple industries. Major consumers include copper and gold concentrators (such as Oyu Tolgoi and Erdenet), building material manufacturers, and agricultural operations . As one study notes, lime filtration is essential for water treatment centers, and coal-fired power stations require lime for carbon monoxide filtration .
The Mongolian government has been actively supporting lime production capacity expansion, with recent tender announcements for lime plant investments reaching 61.3 billion Mongolian tugriks . This project positions our customer to meet growing local demand while reducing reliance on imported lime.
The Challenge: Meeting Mongolian Market Needs
Our Mongolian customer operates in a region with limited local lime production capacity. They faced several challenges:
Limited local supply – Most industrial lime was being imported, adding significant logistics costs
Quality inconsistency – Available lime products did not consistently meet industrial specifications
Growing demand – Local mining and construction sectors were expanding rapidly
Fuel constraints – The site required flexibility in fuel selection to optimize operating costs
The customer needed a reliable, proven lime production solution that could deliver consistent product quality while keeping capital and operating costs manageable.
Our Solution: Φ2.2×42m Rotary Kiln System
Henan Hongke Heavy Machinery engineered a complete lime production system centered around a Φ2.2×42m rotary kiln – a well-established configuration for 50 TPD applications .
Key Equipment Specifications
| Parameter | Value |
|---|---|
| Kiln diameter | 2.2 meters |
| Kiln length | 42 meters |
| Capacity (design) | 50 tons per day |
| Operating temperature | 950–1,250°C |
| Drive system | Heavy-duty gear drive with auxiliary motor |
| Sealing system | Advanced sealing technology |
Complete System Configuration
The delivered system includes the following integrated components, all engineered and manufactured by Henan Hongke Machinery:
1. Vertical Preheater
The preheater recovers thermal energy from kiln exhaust gases to preheat limestone feed to approximately 800–900°C before it enters the kiln, achieving 25–35% pre-calcination. This reduces fuel consumption by up to 30% compared to non-preheater configurations and significantly improves overall system thermal efficiency .
2. Φ2.2×42m Rotary Kiln
The core calcination unit features high-quality carbon steel shell construction with high-alumina refractory lining. The slightly inclined, slowly rotating cylinder ensures uniform heat distribution and complete calcination of limestone at temperatures between 1,100°C and 1,250°C . The open calcination design allows effective sulfur removal – a critical requirement for producing high-quality lime .
3. Vertical Cooler
The cooler rapidly quenches hot lime product from approximately 1,100°C to below 100°C, preserving the lime's reactivity (activity degree). Rapid cooling is essential for maintaining the high reactivity needed for metallurgical and chemical applications . The hot cooling air is recovered and recycled to the kiln as secondary combustion air, further improving thermal efficiency.
4. Exhaust Gas Treatment System
The system incorporates multi-stage dust collection to ensure environmental compliance, with outlet dust concentrations consistently below 30–50 mg/Nm³ .
5. Control System
PLC-based automation provides centralized monitoring of temperature profiles, feed rates, and kiln rotation speed, ensuring consistent product quality and minimal operator intervention .
Why This Kiln Works for Mongolian Conditions
| Feature | Advantage |
|---|---|
| Fuel flexibility | Capable of firing pulverized coal or natural gas – adapting to local fuel availability |
| Proven 50 TPD capacity | Matches market demand scale for mid-sized operations |
| Preheater integration | Reduces fuel consumption, lowers operating costs |
| Rapid cooler | Preserves lime reactivity for metallurgical applications |
| Environmental compliance | Meets emission standards with integrated dust control |
Customer Benefits
Once fully operational, this 50 TPD lime production line will deliver:
Reduced import dependency – Local production eliminates costly cross-border logistics
High-quality product – Active lime meeting metallurgical specifications
Energy-efficient operation – Preheater technology reduces fuel costs
Stable supply – Reliable 24/7 operation supports local industry growth
About Henan Hongke Heavy Machinery Co., Ltd.
Henan Hongke Heavy Machinery Co., Ltd. (Henan Hongke Machinery) has been manufacturing industrial processing equipment since 2006. Our product portfolio includes:
Rotary Kilns – for lime, cement, metallurgy, and mineral calcination
Rotary Dryers – for sludge, biomass, and industrial materials
Ball Mills – for ore, slag, cement, and chemical grinding
Crushers – for primary and secondary size reduction
We provide custom engineering, full manufacturing, installation guidance, and after-sales support for customers worldwide. Our rotary kiln systems incorporate advanced sealing technology, variable-frequency drives, and integrated preheater/cooler designs that improve operational efficiency by up to 10% compared to conventional configurations .
Summary
The Φ2.2×42m lime rotary kiln project in Mongolia is engineered to deliver 50 tons per day of high-quality quicklime, supporting the region's growing industrial demand. By integrating preheater technology, advanced seals, and efficient cooling systems, the facility will achieve consistent product quality with optimized fuel consumption.
For lime calcination, mineral processing, or other thermal treatment applications, contact Henan Hongke Heavy Machinery Co., Ltd.
Henan Hongke Heavy Machinery Co., Ltd.
Rotary Kilns | Rotary Dryers | Ball Mills | Crushers – Engineered for Real-World Results