Henan Hongke Heavy Machinery Co., Ltd. is pleased to announce the successful completion of a Φ 1.8×40m lime rotary kiln production line at a customer site in Jiangxi Province, China. This is a brand-new installation — not a refurbishment, not an upgrade of old equipment — designed and built from the ground up as a complete, turnkey lime calcination solution.
Project Background: Meeting Jiangxi's Growing Lime Demand
Jiangxi Province, located in southeastern China, has a well-established industrial base serving metallurgical, building materials, and chemical sectors. These industries all require a reliable supply of high-quality active lime (quicklime) for fluxing, chemical reactions, and environmental treatment applications .
Our customer, an industrial operator in the region, identified a gap in the local lime supply chain. Existing production capacity could not consistently meet the quality and volume requirements of downstream users. They needed a modern, reliable rotary kiln system that could deliver consistent product quality while maintaining operational efficiency and meeting environmental standards.
After evaluating several suppliers, they chose Henan Hongke Heavy Machinery Co., Ltd. because of our proven expertise in lime calcination systems and our ability to deliver a complete, custom-engineered solution — not just a machine, but a fully integrated production line tailored to their specific capacity and site conditions.
What We Supplied
A complete lime production line built around a Φ 1.8×40m rotary kiln.
| Key Specification | Value |
|---|---|
| Kiln diameter | 1.8 meters |
| Kiln length | 40 meters |
| Capacity | Custom-engineered to customer requirements |
| Operating temperature | Up to 1,250°C (burning zone) |
| Kiln inclination | 3.5–4% |
| Rotation speed | Variable frequency drive |
| Drive system | Heavy-duty gear drive with auxiliary motor |
The system includes:
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 .
Φ 1.8×40m rotary kiln – the core calcination unit where limestone (CaCO₃) is thermally decomposed into quicklime (CaO) and CO₂ at temperatures between 1,100°C and 1,250°C .
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 .
Multi-channel burner – provides precise flame control and fuel flexibility, capable of operating on pulverized coal or natural gas.
Dust collection system – multi-stage treatment including cyclone pre-separator and pulse-jet bag filter, achieving outlet dust concentrations consistently below 30–50 mg/Nm³ .
Automation & control – PLC-based centralized control monitoring temperature profiles, feed rates, kiln rotation speed, and emissions in real time .
How the Lime Production Process Works
| Stage | Equipment | What Happens |
|---|---|---|
| Preheating | Vertical preheater | Limestone is preheated to ~900°C using waste gas from the kiln; 25–35% pre-calcination achieved |
| Calcination | Φ 1.8×40m rotary kiln | Calcium carbonate (CaCO₃) decomposes to calcium oxide (CaO) + CO₂ at 1,100–1,250°C |
| Cooling | Vertical cooler | Hot lime is cooled from ~1,100°C to <100°C; reactivity is preserved |
| Dust control | Cyclone + bag filter | Exhaust gases are cleaned before release; emissions below 30–50 mg/Nm³ |
The rotary kiln operates on the principle of combined rotational and gravitational movement. As the cylinder rotates, limestone particles tumble circumferentially while simultaneously advancing axially from the high end (kiln tail) toward the low end (kiln head). This dual-motion ensures thorough and uniform heating of all material particles .
Why This Customer Chose Henan Hongke Heavy Machinery
After evaluating several suppliers, the customer selected Henan Hongke Heavy Machinery for several compelling reasons:
1. Complete, Brand-New System
The customer was clear: no refurbished equipment, no repurposed cement kilns. They wanted a purpose-built system designed specifically for lime calcination. We delivered exactly that — a complete production line built from the ground up.
2. Proven Expertise in Lime Calcination
Henan Hongke Heavy Machinery has extensive experience in designing and building rotary kiln lime production lines . Our systems incorporate advanced sealing technology, variable-frequency drives, and integrated preheater/cooler designs that improve operational efficiency compared to conventional configurations .
3. Custom Engineering
We don't sell off-the-shelf equipment. Every system is engineered to match the customer's specific capacity targets, material characteristics, and site conditions.
4. Full Project Support
From design and manufacturing to installation guidance, commissioning, and after-sales service, we stay with our customers every step of the way.
Project Completion: A New Installation, Ready for Operation
This project was completed as a brand-new installation — not an equipment upgrade, not a refurbishment. The entire system was engineered, manufactured, and installed as a fresh production line, incorporating the latest design features and technologies.
Key outcomes of the project:
Full system integration – All components, from preheater to cooler to dust collection, work together as a seamless production line
Consistent product quality – The calcination system delivers active lime meeting commercial specifications with low over-burning rates
Environmental compliance – Dust collection ensures emissions meet national standards
Operational readiness – The system is ready for continuous production
About Henan Hongke Heavy Machinery Co., Ltd.
Henan Hongke Heavy Machinery Co., Ltd. (Henan Hongke Machinery) has been designing and manufacturing industrial processing equipment since 2006. Our product portfolio includes:
Rotary Kilns – for lime, dolomite, 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. We focus on one-stop solutions for mining and materials processing — complete systems that work, not just individual machines.
Let's Talk About Your Lime Project
Whether you need a new lime kiln, an equipment upgrade, or technical advice on thermal processing, we're here to help.
Contact Henan Hongke Heavy Machinery Co., Ltd. — we'll listen to your needs and deliver equipment that works, day after day.
Henan Hongke Heavy Machinery Co., Ltd.
Rotary Kilns | Rotary Dryers | Ball Mills | Crushers – Built for Reliability, Backed by Service