Henan Hongke Heavy Machinery Co., Ltd. is pleased to report on the successful deployment of a 300-ton-per-day lime rotary kiln production line at a customer site in Qingyuan, Guangdong Province, China. This project demonstrates our capability to deliver engineered lime calcination solutions for the metallurgical and industrial markets in southern China.
Project Background: Meeting Industrial Demand in the Pearl River Delta
Qingyuan, located in northern Guangdong, has emerged as an important industrial base serving the Pearl River Delta region. The area's growing steel production, non-ferrous metal smelting, and building materials industries all require a reliable supply of high-quality active lime (quicklime) for fluxing, chemical reactions, and construction applications .
Our customer, a calcium products manufacturer in Qingyuan, identified a gap in the local lime supply chain . With existing production unable to meet the quality and volume requirements of downstream users, they turned to Henan Hongke Machinery for a complete rotary kiln solution.
The customer's requirements were clear:
| Requirement | Target |
|---|---|
| Daily capacity | 300 tons of active lime |
| Product quality | CaO content ≥ 90%, reactivity ≥ 320 ml |
| Environmental compliance | Dust emissions meeting national standards |
| Operational reliability | 24/7 continuous operation |
| Fuel flexibility | Capable of firing pulverized coal or gas |
Our Solution: Engineered Lime Production System
The heart of this production line is a rotary kiln system engineered by Henan Hongke Heavy Machinery for 300 TPD capacity.
System Configuration
This project is a complete production line — not just a kiln. Henan Hongke Heavy Machinery supplied the entire system including:
1. Vertical Preheater
Recovers waste heat from kiln exhaust gases, preheating limestone to approximately 800–900°C and achieving 25–35% pre-calcination before material enters the kiln. This reduces fuel consumption by up to 30% compared to systems without preheaters.
2. Rotary Kiln
The core calcination unit where limestone (CaCO₃) is thermally decomposed into quicklime (CaO) and CO₂. The kiln operates at temperatures between 1,100°C and 1,250°C, ensuring complete calcination and high product reactivity.
3. Vertical Cooler
Rapidly cools the hot lime product from approximately 1,100°C to below 100°C, preserving high reactivity. The recovered hot air is recycled to the kiln as secondary combustion air, improving thermal efficiency.
4. Multi-channel Burner
Provides precise flame control and fuel flexibility, capable of operating on pulverized coal or natural gas.
5. Dust Collection System
Multi-stage treatment including cyclone pre-separator and pulse-jet bag filter, achieving dust emissions well below regulatory limits.
6. Automation & Control
DCS-based centralized control system monitoring temperature, pressure, material flow, and emissions in real time.
Project Status: Successful Commissioning
The 300 TPD lime rotary kiln project in Qingyuan has been successfully commissioned and is now in full operation. Key achievements include:
Full production capacity reached – The system consistently produces 300 tons of high-quality active lime per day
Product quality verified – CaO content meets the ≥ 90% specification, with reactivity ≥ 320 ml, suitable for metallurgical and chemical applications
Environmental compliance achieved – Dust emissions meet national standards
Operational reliability – The system is achieving designed uptime targets
Customer Benefits
The successful operation of this 300 TPD lime production line delivers:
| Benefit | Impact |
|---|---|
| Consistent high-quality product | Active lime meeting metallurgical and chemical specifications |
| Lower operating costs | Preheater technology reduces fuel consumption |
| Reliable 24/7 operation | Heavy-duty design and automation minimize downtime |
| Environmental compliance | Emissions controlled to meet national standards |
| Local supply chain | Reduces transportation costs for the region |
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, dolomite, 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, commissioning support, and after-sales service for customers worldwide.
Summary
The 300 TPD lime rotary kiln project in Qingyuan, Guangdong, demonstrates Henan Hongke Heavy Machinery's ability to deliver engineered lime calcination solutions that meet demanding industrial requirements. By integrating preheater technology, advanced sealing, automated controls, and a proven kiln design, the system delivers consistent product quality with optimized fuel consumption and reliable 24/7 operation.
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