Molybdenum Ore Rotary Kiln – Running Well and Praised by Customer in Weishi, Kaifeng
Henan Hongke Heavy Machinery Co., Ltd. is pleased to share an update on a molybdenum ore rotary kiln production line at a customer site in Weishi County, Kaifeng, Henan Province, China. The system has been running smoothly since commissioning and has received positive feedback from the customer. This is a brand-new installation—not a refurbishment, not an upgrade of old equipment.
Project Background: Molybdenum Processing in Henan
Molybdenum is a critical metal used in steel alloys, catalysts, lubricants, and electronics. Its processing typically involves roasting molybdenum concentrate to remove sulfur and other impurities, converting molybdenite (MoS₂) into technical-grade molybdic oxide (MoO₃). This roasting step is essential for producing a marketable product.
Our customer in Weishi County operates in the non-ferrous metals sector, processing molybdenum concentrate from regional mining operations. They needed a reliable, high-performance rotary kiln system for the roasting stage—one that could handle their specific feed material, deliver consistent product quality, and operate continuously.
They came to us with clear requirements:
Consistent roasting performance – stable temperature profile for complete sulfur removal
Reliable continuous operation – 24/7 production to meet market demand
Environmental compliance – effective capture of SO₂ and dust emissions
Brand-new equipment – no used or refurbished machinery
Complete solution – not just a kiln, but a fully integrated production line
Why This Customer Chose Henan Hongke Machinery
After evaluating several suppliers, the customer selected Henan Hongke Heavy Machinery for several compelling reasons:
1. Proven Expertise in Mineral Roasting
Molybdenum roasting requires precise temperature control and residence time to achieve complete conversion of MoS₂ to MoO₃. We demonstrated our understanding of the process and our ability to design a kiln that meets these requirements.
2. Custom-Engineered for Their Material
We don't sell off-the-shelf equipment. Our engineering team designed this kiln specifically for the customer's molybdenum concentrate—considering feed size, moisture content, and target throughput.
3. Complete, Brand-New System
The customer was clear: no refurbished units, no repurposed cement kilns. They wanted a purpose-built system designed specifically for molybdenum roasting. We delivered exactly that—a complete production line built from the ground up.
4. One-Stop Solution Provider
Henan Hongke Heavy Machinery specializes in one-stop solutions for mining and materials processing. We supplied not just the kiln, but the complete line—feed system, burner, dust collection, discharge, and controls. The customer didn't have to coordinate multiple suppliers.
5. Commitment to Long-Term Partnership
The customer wanted a partner they could rely on for years, not just for this project. We demonstrated our commitment to after-sales support, spare parts availability, and ongoing technical assistance.
What We Supplied
A complete molybdenum roasting production line built around a rotary kiln.
| Key Specification | Value |
|---|---|
| Application | Molybdenum concentrate roasting |
| Operating temperature | Up to 1,000°C (adjustable) |
| Kiln inclination | 3–4% |
| Rotation speed | Variable frequency drive |
| Drive system | Heavy-duty gear drive with auxiliary motor |
| Sealing system | Labyrinth seals with air purge |
The system includes:
Controlled feed system for consistent material entry
Rotary kiln with refractory lining
Multi-fuel burner (gas or pulverized coal)
Dust collection system (cyclone + bag filter)
Discharge and cooling system
PLC-based controls with temperature monitoring and data logging
How the Molybdenum Roasting Process Works
| Stage | What Happens |
|---|---|
| Feed | Molybdenum concentrate enters through a controlled feed system |
| Heating | Material is gradually heated as it moves through the kiln |
| Roasting | At 500–650°C, molybdenite (MoS₂) reacts with oxygen to form molybdic oxide (MoO₃) and sulfur dioxide (SO₂) |
| Discharge | Roasted product exits the kiln at the lower end |
| Gas treatment | SO₂-containing exhaust gas passes through dust collection and gas treatment systems |
The rotary kiln operates on a simple but effective principle: the drum rotates slowly, and internal lifting flights shower the material through the hot gas stream. This ensures uniform contact between the molybdenum concentrate and the roasting atmosphere—consistent conversion without hot spots or incomplete roasting.
Actual Results: Running Well and Praised by Customer
The system has been running smoothly since commissioning. Key results:
| Performance Metric | Result |
|---|---|
| Operational stability | Continuous operation with minimal interruptions |
| Product quality | Consistent roasting, complete sulfur removal |
| Throughput | Meets production targets |
| Emission compliance | Dust and SO₂ controlled within regulatory limits |
| Customer feedback | Positive—system performs as expected |
The customer has expressed satisfaction with the system's performance and reliability.
Customer Feedback
"The kiln has been running smoothly since startup. It handles our molybdenum concentrate without the issues we had before. Product quality is consistent, emissions are under control, and we're meeting our production targets. Good equipment, good support." — Operations Manager, Weishi molybdenum processing facility
What This Means for Our Customer
| Benefit | Value |
|---|---|
| Consistent roasting quality | Uniform product, batch after batch |
| Reliable operation | Built for continuous production with minimal downtime |
| Environmental compliance | Effective dust and SO₂ capture |
| Lower operating costs | Optimized fuel consumption and maintenance |
| Full support | Commissioning, spare parts, technical assistance |
| Brand-new reliability | No hidden wear, full service life ahead |
Building Long-Term Partnerships
At Henan Hongke Heavy Machinery, we view a successful commissioning as the start of a long-term relationship. Our commitment to the Weishi customer includes:
Technical support – process optimization and troubleshooting
Spare parts availability – critical components stocked for quick delivery
Maintenance guidance – support for preventive maintenance planning
Future cooperation – ready to assist with capacity expansion or process changes
We're not just a supplier. We're a partner.
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 molybdenum, lime, dolomite, metallurgy, and mineral calcination
Rotary Dryers – for sludge, sand, biomass, and industrial materials
Ball Mills – for ore, slag, cement, and chemical grinding
Crushers – for primary and secondary size reduction
We focus on one-stop solutions for mining and materials processing—complete systems, not just individual machines. From engineering to installation and after-sales service, we stay with our customers every step of the way.
Let's Talk About Your Roasting Project
Whether you need a rotary kiln for molybdenum roasting, other mineral processing, or any thermal treatment application, we're here to help.
Contact Henan Hongke Heavy Machinery Co., Ltd. – we'll listen to your needs and deliver equipment that works.
Henan Hongke Heavy Machinery Co., Ltd.
Rotary Kilns | Rotary Dryers | Ball Mills | Crushers – Built for Reliability, Backed by Service