How to Build an Efficient Eggshell Powder Processing Line
Eggshells are an abundant by-product generated by food factories, egg processing plants, and commercial kitchens. Instead of letting them become waste, more manufacturers are turning eggshells into high-value products such as agricultural calcium supplements, animal feed additives, bio-fillers, and cosmetic-grade powder.
To achieve stable quality and fine powder output, a professional eggshell powder processing line is essential. This article introduces the essential pre-treatment steps and explains how Yinda Machinery’s equipment works together to create a complete, efficient, and economical production line.
Pre-Treatment: Cleaning and Membrane Removal
Before eggshells enter industrial machinery, they must be properly washed and the inner membrane removed. Cleaning eliminates residues and contaminants, while membrane removal prevents odors, discoloration, and impurities during grinding.
Once the shells are clean and dry, they can move directly into the eggshell powder processing line.
Yinda Machinery’s Complete Eggshell Powder Processing Line
Yinda Machinery offers a full solution designed specifically for brittle mineral-based materials like eggshells. The line consists of four main machines:
- YDHF series Hot Air Drying Oven
- YDCSseries Coarse Crusher
- YDWFseries Air Classifier Mill
- YDGZseries Vibrating Sifter
Each machine plays a unique role in turning raw eggshells into fine powder.
1. YDHF Hot Air Drying Oven – Efficient Shell Drying
Clean eggshells contain moisture, which affects crushing efficiency and powder fineness. Proper drying ensures the shells become crisp and fragile—ideal conditions for crushing and grinding.
工作原则
The YDHF Hot Air Drying Oven uses a forced hot-air circulation system. Heating elements generate warm air, and a powerful circulation fan drives this air through the drying chamber, ensuring it flows evenly across all trays. The continuous circulation accelerates moisture evaporation from the eggshells while maintaining a stable, uniform temperature throughout the oven. This prevents uneven drying and ensures the shells become crisp and ready for crushing.
YDHF Series Eggshell Drying Oven
https://www.youtube.com/shorts/fm43ZHRvpuI
主要特征
- Food-grade stainless steel with fine polishingensures hygiene and corrosion resistance.
- Multiple heating options: electric, steam, or thermal oil heating for flexible operation.
- Even hot-air circulationguarantees uniform drying without overheating.
- Adjustable temperature and drying timefor different shell sizes.
- Easy to clean and maintain, suitable for continuous industrial use.
Step 2: Coarse Crushing – YDCS Coarse Crusher
For optimal results, it is recommended to pre-crush dried eggshells before fine grinding. Coarse crushing improves feeding consistency, reduces the risk of overloading the fine mill, and helps achieve more uniform powder fineness. This step ensures smoother operation and higher efficiency of the eggshell powder processing line.
YDCS Series Eggshell Coarse Crusher
https://www.youtube.com/shorts/Gn3xe5D2PUM
工作原则
The YDCS Coarse Crusher uses high-speed rotating blades to break dried eggshells into small particles (3–15 mm), preparing them for fine milling. An integrated axial-flow fan continuously removes dust, keeping the working environment clean and ensuring smooth material flow through the machine.
主要特征
- Full stainless steel construction with polished treatmentfor hygiene and corrosion resistance.
- Adjustable particle sizethrough internal screens to meet different processing requirements.
- Ideal for large, hard, or fibrous materialsand pre-processing before fine milling.
- Widely used in food, pharmaceutical, and chemical industriesfor reliable material preparation.
Step 3: Fine Grinding – YDWF Air Classifier Mill (200–300 Mesh)
To produce high-purity eggshell calcium powder suitable for food, pharmaceutical, and nutraceutical applications, fine grinding is recommended. Ultra-fine milling ensures a uniform particle size (200–300 mesh), improving solubility, bioavailability, and dispersibility. This step is essential for creating high-quality calcium powder that meets strict standards for health supplements, functional foods, and medical-grade products.
YDWF Series Air Classifier Mill
https://www.youtube.com/shorts/G77of8lD1wM
工作原则：
The YDWF Air Classifier Mill combines high-speed grinding with air classification in one unit. Pre-crushed eggshells enter the grinding chamber, where high-speed blades pulverize them into fine powder. An integrated air classifier separates particles by size, returning oversized material for re-grinding while collecting uniform calcium powder. A built-in dust collection system keeps the process clean and ensures consistent, high-quality powder.
Key Features
- Integrated grinding and classificationin one unit for efficient calcium powder production.
- Adjustable fineness: final powder size controlled by the classifying wheel speed.
- Cyclone dischargefor smooth material flow and easy collection.
- Pulse dust collectorensures a clean working environment and prevents contamination.
- Multiple models availableto meet different production needs, with customization support.
Step 4: Final Screening – YDGZ Vibrating Sifter
After fine grinding, some oversized particles may remain. Using the YDGZ series Vibrating Sifter is recommended for those who want to ensure their eggshell calcium powder is more uniform and free from impurities, enhancing product quality and consistency.
YDGZ Series Vibrating Sifter
https://www.youtube.com/watch?v=r2KxauaHiQs
The YDGZ Vibrating Sifter applies high-frequency vibration to gently separate fine eggshell calcium powder from larger particles, allowing uniform powder to be collected for packaging or further use.
主要特征
- Compact and lightweight, easy to move and install.
- Adjustable discharge directionfor flexible operation.
- Smooth screening: prevents clogging and minimizes powder flying.
- Easy to operate and clean, with simple screen replacement.
- Low maintenance, suitable for single or multi-layer use.
Conclusion
From clean, membrane-free eggshells to high-purity eggshell calcium powder, the production process involves drying, coarse crushing, fine grinding, and optional final screening. Each step in the eggshell powder processing line ensures efficiency, hygiene, and consistent product quality, allowing manufacturers to turn what was once waste into a valuable resource.
About Yinda Machinery
Yinda Machinery specializes in designing and manufacturing powder processing equipment for over 20 years. We provide complete, customizable solutions for producing high-quality calcium powder and other fine powders for food, pharmaceutical, and nutraceutical applications.
If you are interested in our equipment or have similar processing needs, please contact us through the following channels:
Contact Person: Dennie Yuan
Tel/ WeChat/WhatsApp: +86 13914192807
Email: dennie@yindamachinery.com
Website:银达机械网