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Henan Hongke Heavy Machinery Co., Ltd. has successfully deployed a Φ2.5×60m rotary kiln for quartz sand whitening at a customer site in India. The system runs at 150 tons per day. Here's the quick story.
The Job: Making Quartz Sand White
Natural quartz sand often contains iron impurities. That's bad for glass, ceramics, and electronics — it makes the product look dirty and lowers quality.
To fix this, you heat the sand to high temperature. The heat changes the crystal structure, creates tiny cracks, and exposes the iron. Then acid leaching removes it. The result? White, high-purity quartz that sells for more.
What We Supplied
We designed and built a Φ2.5×60m rotary kiln for this job.
| Key Spec | Value |
|---|---|
| Diameter | 2.5 m |
| Length | 60 m |
| Capacity | 150 tons/day |
| Max temperature | Up to 1,200°C |
| Seals | Labyrinth with air purge |
What's in the system:
Kiln body with high-alumina refractory lining
Feeder — screw or belt type
Burner — works on gas or coal powder
Cooler — to bring product down safely
Dust collector — cyclone + bag filter
Control panel — PLC-based with zone temperature monitoring
How It Works
| Zone | Temp Range | What Happens |
|---|---|---|
| Preheating | 200–800°C | Dries sand, burns off organics |
| Calcination | 800–1,300°C | Crystal flips, iron exposed |
| Cooling | Controlled | Prevents re-contamination |
Why This Kiln Works for Quartz
| Feature | Why It Matters |
|---|---|
| Precise temperature control | Complete phase change — more iron removed |
| Continuous operation | Runs 24/7, no stops |
| Uniform heating | All particles treated the same |
| Good sealing | Less heat loss, less dust |
Customer Benefits
Once running steady, this kiln will give them:
Whiter product — iron removed to high-grade spec
Higher price — whitened sand sells for premium
Consistent quality — automation keeps it repeatable
Clean operation — meets local emission rules
Who We Are
Henan Hongke Heavy Machinery Co., Ltd. has been building kilns, dryers, ball mills, and crushers since 2006. We handle custom engineering, manufacturing, installation support, and after-sales service worldwide.
Bottom Line
This Φ2.5×60m kiln turns raw quartz sand into high-value whitened product — 150 tons every day. It's a straightforward, proven process that delivers consistent results.
If you need a kiln for quartz sand or any other mineral, talk to us.
Contact Henan Hongke Heavy Machinery Co., Ltd. – we deliver equipment that works.
Henan Hongke Heavy Machinery Co., Ltd.
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