Liquid Nitrogen Cryogenic Pulverizer
Small Liquid Nitrogen Cryogenic Grinder for Ultrafine Grinding of Heat-Sensitive Materials in Laboratories
Item Number: PP-LN03
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Product Overview
This compact cryogenic grinding system combines high-speed impact milling with direct liquid nitrogen injection to achieve ultrafine pulverization of tough, heat-sensitive materials. By embrittling the sample at cryogenic temperatures, it prevents thermal degradation and delivers consistent, fine powders down to 40–350 mesh. The all-in-one design integrates feeding, grinding, collection, and liquid nitrogen controls into a single stainless steel cabinet, saving space and simplifying operation.
It is widely deployed in material science laboratories, quality inspection agencies, and R&D facilities across the plastics, polymer, rubber, and advanced materials sectors. Typical applications include recycling analysis, failure investigation, and compositional testing where maintaining sample integrity is critical. From as little as 10 g up to continuous batches of 3 kg/h, this unit adapts to both micro-scale and small production needs.
Engineered for demanding daily use, the grinder features a rugged stainless steel frame, low-temperature-resistant seals, and a secondary cooling circuit that uses vaporized nitrogen to extend motor life. Proven in accredited labs and industrial settings, this system delivers repeatable results and low maintenance, backed by comprehensive safety accessories and responsive technical support.
Key Features
- Integrated All-in-One Design: The grinding host, collection cyclone, screw feeder, LN2 interface, and control panel are housed in a single 304 stainless steel cabinet, providing a clean, ready-to-use workstation with a minimal footprint.
- Flexible Liquid Nitrogen Delivery: Choose between a manual foot pump, electric pump, or an optional intelligent LN2 pump—all governed by a graduated scale valve for precise control. This versatility supports everything from quick 10 g samples to extended continuous runs.
- High-Speed Impact Grinding: A rotor spinning at 25,000 rpm creates intense impact and vortex shear, while the screen-free air classification system ensures uniform particle size and continuous discharge without clogging.
- Variable Speed Screw Feeding: The removable screw feeder (0–10 rpm adjustable) provides steady, repeatable material intake, and a manual feed port handles small or irregular samples effortlessly.
- Enhanced Low-Temperature Durability: Custom-formulated fluorine rubber seals maintain flexibility under cryogenic conditions, eliminating the brittleness and frequent replacement associated with standard elastomers.
- Secondary Cooling for Motor Longevity: A built-in fan channels vaporized LN2 through the motor compartment, lowering winding temperature and extending the service life during prolonged operation.
- Independent Controls and Safety: Dedicated switches for each motor, overload protection, and an emergency stop button give operators full command and rapid shutdown in any situation.
- Dual-Function Capability: The grinding module can be used independently as a laboratory ultrafine mill for non-cryogenic applications, maximizing equipment utilization.
- Complete Accessory Package: Included LN2 dewar mobile base, cryogenic gloves, protective goggles, immersion basket, and pump storage case ensure safe handling and convenient storage.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Polymer & Plastic Recycling | Grinding post-consumer plastics (PE, PET, PP) from bottles, films, and packaging for quality analysis and material research. | Cryogenic embrittlement prevents melting, delivering representative fines for accurate melt flow or spectroscopy testing. |
| Biodegradable & Bioplastic Testing | Processing PLA, PBS, and starch-based materials from disposable cutlery and packaging for degradation studies. | Maintains molecular integrity by avoiding heat-induced crystallinity changes, yielding reliable property data. |
| Elastomer & Rubber Analysis | Size reduction of natural rubber, silicone, and thermoplastic elastomers for mechanical and thermal analysis. | Produces fine powders without oxidative degradation, preserving elastomeric and filler distribution. |
| Food & Agricultural Research | Cryo-milling of freeze-dried fruits, vegetables, and grains for nutrient, pesticide, or contaminant analysis. | Retains volatile aromatics and heat-labile nutrients by keeping samples frozen throughout grinding. |
| Pharmaceutical & Excipient Development | Micronization of heat-sensitive APIs and polymers for formulation and bioavailability studies. | Tight particle size control and low-temperature processing prevent amorphization and chemical breakdown. |
| Academic & University Labs | Multi-purpose grinding for materials science, chemistry, and engineering student projects. | Small minimum sample (10 g) and easy-to-use design accommodate diverse research needs with minimal waste. |
| Quality Inspection & Forensic Labs | Standardized sample preparation for ISO/ASTM testing of polymers, composites, and evidence materials. | Consistent, repeatable output ensures compliance with testing protocols and court-ready documentation. |
| Petroleum & Petrochemical | Cryogenic crushing of asphaltenes, waxes, and catalyst supports for compositional and structural analysis. | Eliminates heat-induced phase changes, delivering pure, uncontaminated samples for accurate results. |
Technical Specifications
| Parameter | Value / Options |
|---|---|
| Model | PP-LN03 |
| Main Motor Power | 1.8 kW |
| Voltage | 220 V / 50 Hz |
| Main Motor Speed | 25,000 rpm |
| Grinding Fineness | 40–350 mesh |
| Batch Output | 0.3–3 kg/h |
| Minimum Sample Quantity | 10 g |
| Feed Particle Size | ≤5 mm |
| Seal Ring Material | Low-temperature resistant fluorine rubber |
| Discharge Process | Continuous |
| Classification Method | Screen-free air classification (cyclone) |
| Feeding Motor Power | 40 W |
| Feeding Speed Range | 0–10 rpm (adjustable) |
| Feeding Method | Screw feeder with manual feed port |
| LN2 Dewar Model | YDS-30 |
| LN2 Dewar Volume | 30 L (optional 50 L) |
| LN2 Pump Model | YDB-50J |
| LN2 Input Method | Electric pump or foot pump (optional intelligent pump available) |
| LN2 Output Control | Scale valve |
| Crushing Method | High-speed impact |
| Overall Weight | 46 kg |
| Dimensions (L×W×H) | 750 × 450 × 850 mm |
| Optional Accessories | Intelligent liquid nitrogen pump, self-pressurizing pump |
| Safety Notes | Customer supplies liquid nitrogen; ensure adequate ventilation and wear protective equipment. |
Why Choose This Product
- Proven Reliability: Built upon decades of cryogenic grinding expertise, the robust stainless steel construction and enhanced sealing system ensure years of dependable operation in the busiest labs.
- Precision Engineering: Advanced rotor dynamics and screen-free classification deliver narrow particle size distributions and unmatched repeatability, essential for quality control and research data integrity.
- Versatile & Cost-Effective: Dual-function design allows standalone ultrafine milling, while the integrated LN2 system handles materials that conventional mills cannot—eliminating the need for multiple specialized machines.
- Enhanced Safety & Ease of Use: Independent motor controls, overload protection, emergency stop, and full safety gear make operation straightforward and secure, even for less experienced staff.
- Comprehensive Support & Customization: From selecting the optimal LN2 pump to customizing dewar sizes, our team provides tailored solutions and responsive after-sales service to keep your lab productive.
Contact us today to discuss your specific grinding requirements and receive a customized quote for this high-performance cryogenic grinding system.
REQUEST A QUOTE
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