Project Overview
In this industrial engineering project, Henan Hongke Heavy Machinery Co., Ltd. designed, manufactured, and commissioned a high-temperature Φ3.0×60m Bauxite Clinker Rotary Kiln production line for a leading refractory material manufacturer in Shanxi Province, China.
Shanxi holds some of China's richest high-alumina bauxite reserves. However, converting raw high-alumina bauxite into dense, high-bulk-density refractory-grade clinker requires sustained calcination temperatures exceeding 1,550°C—significantly higher than standard mineral processing. Drawing on our proven heavy-duty thermal engineering platform—which also powers our flagship Magnesium Rotary Kiln systems—Henan Hongke Heavy Machinery Co., Ltd. delivered a customized Φ3.0×60m Bauxite Clinker Rotary Kiln capable of continuous, energy-efficient operation under extreme thermal loads.
Technical Highlights & Equipment Specifications
The core of the plant is the Φ3.0×60m Bauxite Clinker Rotary Kiln, engineered with reinforced shell metallurgy, a high-efficiency vertical preheater, and a rotary cooler to achieve complete mullite and corundum phase transformation.
| Parameter | Specification / Value |
| Project Location | Shanxi Province, China |
| Core Equipment | Φ3.0×60m Bauxite Clinker Rotary Kiln (Heavy-Duty Structural Platform) |
| Raw Material | High-Alumina Bauxite Ore ($Al_2O_3$ content: 75%–85%) |
| Production Capacity | 120,000 Tons/Year (360 Tons/Day of Calcined Bauxite Clinker) |
| Calcination Temperature | 1,550°C – 1,650°C (Sintering Zone) |
| Kiln Inclination & Speed | 3.5% Inclination / Variable Frequency Drive (0.5 – 3.5 rpm) |
| Fuel & Burner System | Four-Channel Low-NOx Pulverized Coal / Natural Gas Burner |
| Auxiliary Systems | Vertical Shaft Preheater + Φ2.5×25m Rotary Cooler + High-Temp Baghouse Filter |
| Finished Clinker Bulk Density | ≥ 3.15 – 3.25 g/cm³ (Refractory Grade) |
Key Challenges & Custom Engineering Solutions
1. Sustaining Ultra-High Sintering Temperatures Without Shell Deformation
Challenge: Bauxite clinker sintering demands continuous internal temperatures up to 1,650°C. Conventional kiln shells risk thermal warping, refractory brick spalling, and premature tyre wear under prolonged extreme heat.
Solution: Henan Hongke Heavy Machinery Co., Ltd. applied the same heavy-duty structural engineering used in our high-temperature Magnesium Rotary Kiln and metallurgical kiln lines. The 60-meter shell was fabricated from thickened Q345R boiler-grade steel plates with reinforced transition sections, supported by cast-steel riding rings (tyres) and hydraulic thrust rollers to maintain strict axial alignment.
2. High Energy Consumption & Exhaust Heat Recovery
Challenge: Heating high-alumina ore to 1,600°C consumes substantial thermal energy, making fuel efficiency critical to the plant's operating margin.
Solution: We integrated a multi-chamber vertical preheater at the kiln feed end and a Φ2.5×25m rotary cooler at the discharge end. Exhaust gases recover waste heat to preheat crushed bauxite to over 750°C before entering the Φ3.0×60m Bauxite Clinker Rotary Kiln, while secondary air heated to 600°C+ in the rotary cooler is fed back into the burner—reducing overall fuel consumption by 22%.
3. Preventing Ring Formation (Kiln Accretion) in the Firing Zone
Challenge: Impurities such as $Fe_2O_3$ and $TiO_2$ in raw bauxite can create low-melting liquid phases, leading to ring buildup inside the kiln and unplanned shutdowns.
Solution: Our engineers equipped the kiln with a four-channel adjustable flame burner that precisely controls flame shape and peak temperature distribution, preventing localized overheating and ensuring smooth material flow throughout the 60-meter cylinder.
Project Results & Customer Benefits
Superior Refractory Clinker Quality: The finished bauxite clinker consistently achieved a bulk density above 3.20 g/cm³ and low porosity, meeting Tier-1 international export standards for refractory bricks and castables.
22% Fuel Cost Reduction: The closed-loop heat recovery between the vertical preheater, Φ3.0×60m Rotary Kiln, and rotary cooler cut standard coal consumption to under 135 kg per ton of clinker.
Continuous Industrial Uptime: Automated PLC temperature and pressure monitoring enabled over 330 days of continuous annual operation, with dust emissions controlled below 10 mg/Nm³.
Proven Rotary Kiln Expertise Across Metallurgical & Mineral Industries
From ultra-high-temperature Bauxite Clinker Rotary Kilns to high-activity dolomite calcination Magnesium Rotary Kiln systems, Henan Hongke Heavy Machinery Co., Ltd. delivers turnkey EPC rotary kiln solutions tailored to demanding thermal processes. Every Φ3.0×60m Rotary Kiln we build combines precision heavy fabrication, intelligent combustion control, and full-lifecycle technical support—from raw material laboratory testing to on-site installation and commissioning.
Planning a new bauxite calcination or metal magnesium production line? Contact Henan Hongke Heavy Machinery Co., Ltd. today for a customized process flow design, equipment layout, and detailed quotation.