Stable Powder Feeding to a Rotary Kiln: A Practical Case Using a Screw Feeder
In thermal processing industries, rotary kilns are widely used for continuous treatment of powdered materials. Whether in the production of materials like cement, chemicals, or other powder-based compounds, ensuring stable and precise feeding into the kiln is essential for maintaining product quality and energy efficiency.
In one recent application, a client faced challenges in feeding a fine powder material into their rotary kiln. Manual feeding resulted in inconsistent flow rates, leading to fluctuations in kiln temperature and processing time.
To address this, we supplied a custom-designed screw feeder optimized for integration with the rotary kiln’s inlet. The system incorporated the following features:
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Accurate metering of powder feed through adjustable screw rotation speed
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Bridge-breaking hopper design, preventing clogging and ensuring continuous material flow
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Sealed structure to minimize dust emission and improve operator safety
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Compact and easy-to-maintain configuration suited for space-limited kiln installations
This integration allowed the customer to significantly improve feeding consistency, reduce operator workload, and stabilize their kiln’s overall thermal profile.
The photo below shows the actual installation, where the screw feeder delivers material directly into the rotary kiln through a dust-tight feed interface.
By combining a screw feeder with a rotary kiln, manufacturers can achieve:
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Improved process control
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Consistent thermal treatment results
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Reduced labor and dust handling issues
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Adaptability to various powder characteristics
At Seiwa Giken, we specialize in custom powder feeding systems for rotary kilns and other thermal processing equipment. Whether your application involves fine, cohesive powders or requires strict feeding accuracy, we offer tailored solutions for stable and reliable operation.