Project Overview
In this industrial project, Henan Hongke Heavy Machinery Co., Ltd. successfully engineered, manufactured, and commissioned a heavy-duty Φ3.0×60m Magnesium Rotary Kiln production line for a prominent metal magnesium producer in Guilin, Guangxi, China.
Guilin boasts abundant high-grade dolomite reserves—the primary raw material for Pidgeon process magnesium smelting. However, achieving uniform calcination activity while minimizing fuel consumption in high-humidity southern climates poses significant operational challenges. To meet the client's strict purity and capacity targets, our engineering team delivered a customized Magnesium Rotary Kiln system tailored for continuous, high-efficiency dolomite calcination.
Technical Highlights & Equipment Specifications
The centerpiece of this facility is our Φ3.0×60m Magnesium Rotary Kiln, designed with precision thermal control and heavy-duty mechanical stability to ensure consistent calcined dolomite activity (typically exceeding 30%–35%).
| Parameter | Specification / Value |
| Project Location | Guilin, Guangxi, China |
| Core Equipment | Φ3.0×60m Magnesium Rotary Kiln |
| Raw Material | High-Purity Dolomite |
| Annual Capacity | 150,000 Tons/Year |
| Kiln Inclination & Speed | 3.5% inclination / Variable frequency drive (0.5 – 3.5 rpm) |
| Thermal & Preheating System | Vertical preheater + Low-NOx multi-channel burner + Vertical cooler |
| Emissions Control | High-temperature baghouse dust collector + Desulfurization system |
Key Challenges & Custom Engineering Solutions
1. Maintaining High Calcination Activity of Dolomite
Challenge: In metal magnesium production (Pidgeon process), over-burned or under-burned dolomite severely reduces magnesium reduction efficiency. The client required tight temperature uniformity across the 60-meter kiln shell.
Solution: Henan Hongke Heavy Machinery Co., Ltd. equipped the Magnesium Rotary Kiln with a multi-channel pulverized coal/gas burner and segmented temperature monitoring. Combined with a vertical preheater at the kiln tail, raw dolomite is preheated evenly before entering the Φ3.0×60m Magnesium Rotary Kiln, guaranteeing stable calcination quality.
2. Heat Loss Reduction & Energy Efficiency
Challenge: Traditional rotary kilns often suffer from high exhaust gas temperatures and radiant heat loss, driving up smelting costs.
Solution: We integrated a vertical shaft preheater and a vertical cooler directly into the Magnesium Rotary Kiln circuit. Exhaust gases below 250°C are utilized to preheat incoming dolomite, while secondary air heated by the vertical cooler is fed back into the kiln head, cutting overall fuel consumption by 18%–22%.
3. Mechanical Stability Under Continuous High-Temperature Load
Challenge: A 60-meter kiln operating continuously at 1,150°C–1,250°C requires superior structural rigidity to prevent shell deformation and refractory brick wear.
Solution: The Magnesium Rotary Kiln shell was fabricated from thickened Q245R/Q345R boiler-grade steel plates with precision-machined riding rings (tyres) and hydraulic thrust rollers, ensuring smooth axial movement and extending refractory lining life.
Project Results & Customer Benefits
Superior Dolomite Activity: The calcined dolomite produced by the Magnesium Rotary Kiln consistently achieved high chemical reactivity, boosting downstream magnesium reduction yield by over 4%.
Significant Fuel Savings: Integrated heat recovery lowered standard coal/gas consumption per ton of calcined dolomite by ~20%.
High Operational Uptime: Automated PLC control and robust mechanical design enabled continuous operation exceeding 330 days per year, meeting all Guangxi provincial environmental emission standards.
Why Choose Henan Hongke Heavy Machinery Co., Ltd. for Your Magnesium Rotary Kiln?
As an experienced rotary kiln manufacturer, Henan Hongke Heavy Machinery Co., Ltd. offers turnkey EPC solutions for the metal magnesium industry—covering raw material laboratory testing, Magnesium Rotary Kiln customization, auxiliary preheater/cooler fabrication, on-site installation, and commissioning.
Contact our engineering team today to request a tailored layout design and technical proposal for your Magnesium Rotary Kiln project.