What Is a Calcium Chloride Granulator Machine?
A calcium chloride granulator machine is a specialized piece of dry fertilizer equipment used to convert fine calcium chloride (CaCl2) powder into high-density 2–5mm agricultural granules.
Because calcium chloride is highly hygroscopic (rapidly absorbs moisture from air), traditional wet granulation methods—such as rotary drum or disc granulators—require extensive heat for drying, leading to sticky equipment, frequent clogging, and high energy costs.
The double roller extrusion granulator solves this problem through dry compaction technology. By squeezing dry powder under mechanical force at ambient temperature, it forms solid flakes that are crushed and screened into uniform granules without adding water or liquid binders.
Direct Answer Summary: Dry Extrusion vs. Wet Granulation
| Feature / Metric | Traditional Wet Granulation (Rotary Drum / Disc) | Dry Double Roller Extrusion Granulator |
| Drying Requirement | Requires heavy gas/coal-fired drying equipment | Zero drying needed (100% dry process) |
| Energy Consumption | High thermal energy consumption (High OPEX) | Low power consumption (Only electrical energy) |
| Moisture / Clogging Risk | High risk of melting, sticking, and equipment blockages | Minimal risk (Fully enclosed ambient processing) |
| Granule Hardness | Moderate; higher risk of breaking during shipping | High crushing strength; low dust generation |
| Material Yield Rate | 60% – 70% per single pass | 90% – 95% single-pass efficiency |
How Does a Calcium Chloride Extrusion Line Work?
The calcium chloride compaction line uses a 5-step automated workflow engineered for continuous dry powder processing:
- Precision Dosing & Blending: Raw dry calcium chloride powder and recycled fine particles enter a continuous twin-shaft mixer for consistent feeding.
- High-Pressure Dry Compaction: The blended powder passes into the feed hopper of the double roller granulator. Counter-rotating alloy rollers exert tens of megapascals of pressure, forcing the powder into dense, solid sheet-like flakes.
- Flake Crushing & Granule Shaping: Compacted sheets drop directly into an integrated multi-stage crusher and rotary shaping unit, which breaks the flakes into granular shapes.
- Size Calibration (Screening): A high-frequency rotary screening machine isolates the target 2–5mm granules. Fines are automatically routed back to the mixer for re-processing, achieving a 100% raw material utilization rate.
- Sealed Automatic Bagging: Finished calcium granules move quickly to an automated valve-bag packaging scale to seal the product against ambient moisture.
Key Technical Specifications of Roller Extrusion Equipment
When selecting a calcium chloride fertilizer pelletizer, key technical specifications determine line performance:
- Processing Capacity: 1.0 to 15.0 Metric Tons per Hour (MT/h) per single unit.
- Granule Size Range: 2.0 mm to 5.0 mm (Customizable die roller patterns for round, pill-shaped, or irregular granules).
- Roller Material Construction: High-grade 9Cr2Mo alloy steel, 5CrMnMo, or tungsten carbide sleeves treated with vacuum quenching to resist chemical corrosion and friction.
- Granule Crushing Strength: ≥ 20N per granule, preventing breakage during bulk handling, transport, and soil spreading.
- Dust Control System: Integrated negative-pressure pulse bag dust collector keeps workshop air clean and collects fugitive dust.
Applications of Extruded Calcium Chloride Granules
Calcium chloride granules produced via double roller extrusion serve multiple agricultural and industrial markets:
- Agricultural Fertilizer Blending: Applied as a secondary nutrient fertilizer to supply soluble calcium and chloride ions, correcting calcium deficiency in fruit crops, tomatoes, and peanuts.
- Soil Conditioners: Used in saline-alkali soil remediation to displace sodium ions and improve soil structure.
- Bulk Blending (BB) Fertilizers: The uniform 2–5mm granule size matches standard NPK granules, preventing separation during transport and application.
- Industrial & De-Icing Uses: Serves as a fast-acting road snow-melting agent and industrial desiccant pellet.
Request a Custom Granulation Line Quotation
Looking to build or upgrade a calcium chloride fertilizer production line? Contact our engineering team today for technical layouts, custom roller design options, and factory-direct equipment quotations!
