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Henan Hongke Heavy Machinery Co., Ltd. is proud to announce the successful completion of a Φ 3.2×30m rotary dryer project for ferrous sulfate processing in Jinchang, Gansu, China. This is a brand-new installation — not a refurbishment, not an upgrade of old equipment — designed and built from the ground up as part of a comprehensive industrial byproduct utilization initiative.
Why This Customer Chose Us
Our customer in Jinchang operates a large-scale synthetic rutile production facility that generates substantial amounts of ferrous sulfate as a byproduct. They wanted to turn this material into a commercial product — not just dispose of it. But to do that, they needed a reliable drying system that could handle the material's characteristics and deliver consistent quality.
After evaluating several options, they chose Henan Hongke Heavy Machinery Co., Ltd. because:
We have proven expertise in rotary drying equipment — not just general machinery, but systems designed for specific materials like ferrous sulfate
We offered a complete solution — not just a dryer, but a full line including feed system, heating system, dust collection, and controls
We designed for their specific material — ferrous sulfate requires careful handling to prevent caking and degradation
We delivered brand-new equipment — not refurbished, not repurposed from other applications
We provide ongoing support — we stay with our customers after delivery
What We Supplied
A complete rotary drying system built around a Φ 3.2×30m rotary dryer.
| Key Feature | Specification |
|---|---|
| Dryer diameter | 3.2 m |
| Dryer length | 30 m |
| Material processed | Ferrous sulfate (heptahydrate / monohydrate) |
| Heating method | Direct or indirect (configured to customer requirements) |
| Capacity | Custom-engineered to customer target |
The system includes:
Controlled feed system for consistent material entry
Φ 3.2×30m rotary dryer with gentle lifting flights to protect crystal structure
Heating system with precise temperature control
Multi-stage dust collection (cyclone + bag filter) for environmental compliance
Product discharge and conveying system
PLC-based controls with full data logging
The Material: Ferrous Sulfate and Its Applications
Ferrous sulfate (also known as green vitriol or copperas) is a versatile material with many commercial uses:
| Application | Use |
|---|---|
| Agriculture | Correcting iron deficiency in plants; fertilizer micronutrient |
| Water treatment | Coagulant and flocculant; removes phosphate and hydrogen sulfide |
| Animal feed | Prevents iron deficiency anemia in livestock |
| Industrial | Reducing agent in hazardous waste treatment |
The drying process is key to producing a free-flowing, stable product that meets commercial specifications. Our system removes exterior moisture while protecting the crystal structure — no caking, no degradation.
How the Drying System Works
| Stage | Equipment | What Happens |
|---|---|---|
| Feed | Controlled feeder | Material enters the dryer at a consistent rate |
| Drying | Φ 3.2×30m rotary dryer | Material is gently tumbled through hot gas stream; moisture is removed |
| Dust control | Cyclone + bag filter | Fine particles are captured from exhaust gas |
| Discharge | Conveying system | Dried, free-flowing product is conveyed to storage or packaging |
The 30-meter length provides sufficient residence time for complete and uniform drying. Temperature is carefully controlled to avoid overheating, which could cause product discoloration or chemical changes.
What This Means for Our Customer
The successful completion of this new installation delivers real value:
| Benefit | Value |
|---|---|
| Byproduct becomes product | Ferrous sulfate is now a revenue stream, not a waste stream |
| Consistent quality | Dried product meets commercial specifications for multiple industries |
| Environmental compliance | Dust collection ensures emissions meet regulatory standards |
| Continuous operation | System is ready for reliable 24/7 production |
| Brand-new reliability | No hidden wear, full service life ahead |
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 Dryers — for ferrous sulfate, sludge, biomass, and industrial materials
Rotary Kilns — for lime, dolomite, metallurgy, and mineral calcination
Ball Mills — for ore, slag, cement, and chemical grinding
Crushers — for primary and secondary size reduction
We serve customers worldwide with custom engineering, full manufacturing, installation guidance, commissioning support, and after-sales service. We focus on one-stop solutions — complete systems, not just individual machines.
Building Long-Term Partnerships
At Henan Hongke Heavy Machinery, we believe that a successful project is the beginning of a long-term relationship. Our commitment to our Jinchang customer extends beyond project completion:
Technical support — ongoing advice on process optimization and troubleshooting
Spare parts availability — critical components stocked for quick delivery
Maintenance guidance — support for preventive maintenance planning
Future cooperation — ready to support capacity expansion or process changes
Let's Talk About Your Drying Project
Whether you need a rotary dryer for ferrous sulfate, other chemical products, or any industrial material requiring 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 Dryers | Rotary Kilns | Ball Mills | Crushers – Built for Reliability, Backed by Service
