Sand & Bead Mills
Laboratory Basket Sand Mill for Wet Grinding and Dispersion of Viscous Slurries
Item Number: PP-SBM04
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Product Overview
This basket sand mill is a state-of-the-art laboratory grinding and dispersing system engineered for wet processing of medium to high viscosity slurries. Designed with a robust hollow-shaft drive, it integrates a zirconia bead grinding basket with a high-speed dispersing disc to achieve ultrafine particle size reduction and homogeneous mixing in a single, seamless operation. The compact, benchtop-friendly form factor makes it an essential tool for material scientists and formulation chemists.
The system employs an advanced self-priming impeller that draws slurry from the upper and lower regions of the mixing tank into the grinding basket. Inside, the beads are propelled at high speed by the rotating cage, generating intense shear and impact forces that deagglomerate and comminute particles. The recirculating flow pattern ensures 100% of the batch passes through the grinding zone multiple times, eradicating dead zones and delivering exceptional uniformity.
Trusted by leading research institutions and industrial R&D centers worldwide, this unit is proven in applications ranging from pharmaceutical nano-crystal production to advanced ceramic slurry preparation. Its reliability is underpinned by precision-machined stainless steel components, a maintenance-friendly design, and a heavy-duty variable frequency drive that maintains stable operation even under prolonged use. With minimal residual hold-up and quick disassembly, it is also ideal for multi-material research environments where cleaning efficiency is critical.
Key Features
- Compact Design and Low Noise: The system occupies minimal bench space with its lightweight yet sturdy construction. It operates with exceptionally low acoustic emissions, enabling comfortable long-duration use in close proximity to researchers.
- Integrated Grinding and Dispersing: By mounting dispersing blades on the outside of the grinding basket, the unit simultaneously breaks down agglomerates and disperses particles. This dual-action capability eliminates the need for separate pre-dispersion steps, saving time and resources.
- Variable Frequency Drive with Stepless Speed Control: A premium variable frequency drive enables precise adjustment of rotational speed from 140 to 2800 rpm. Real-time display of operating voltage, current, and speed facilitates optimal parameter settings for reproducible results and easy process documentation.
- Efficient Recirculation Mechanism: A self-priming impeller continuously draws material into the grinding basket from both the top and bottom, then expels it through a central separator screen. This design ensures thorough turnover without dead zones and achieves rapid particle size reduction with unmatched homogeneity.
- Low Grinding Media Requirement: Only a small volume of zirconia beads (filling the 0.35 L basket) is needed, lowering media consumption and cost. The high-density, wear-resistant zirconia beads deliver efficient grinding energy transfer while maintaining long service life.
- Minimal Residual Material and Easy Cleaning: The grinding chamber and basket design leave very little material after processing, simplifying cleaning and reducing product loss. Quick disassembly allows thorough rinsing, making this system ideal for multi-material R&D with minimal cross-contamination risk.
- Versatile Temperature Control Options: For heat-sensitive or high-viscosity formulations, optional jacketed vessels can supply cooling or heating, maintaining the slurry at the optimal processing temperature. This extends the mill's utility to temperature-critical applications like polymer dispersions or high-temperature wax grinding.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Pharmaceutical API Micronization | Wet milling of poorly soluble active pharmaceutical ingredients to increase dissolution rate and bioavailability. The high-shear recirculation yields particles below 1 µm with excellent batch-to-batch repeatability. | Produces uniform nanoparticles with tight size distribution, enhancing drug efficacy and compliance. |
| Ceramic Slurry Preparation | Fine grinding of ceramic powders (e.g., alumina, zirconia, silicon carbide) for tape casting or slip casting in advanced ceramics manufacturing. The mill ensures complete deagglomeration and stable suspension. | Achieves high slurry homogeneity and submicron particle sizes, improving green body density and sintering quality. |
| Coating and Pigment Dispersion | Dispersing and grinding of pigments, dyes, and functional fillers for paints, inks, and protective coatings. The recirculation action prevents settling and ensures consistent color strength. | Yields stable dispersions with reduced particle agglomeration, resulting in vibrant colors and consistent film properties. |
| Battery Material Development | Processing cathode and anode electrode slurries for lithium-ion batteries, ensuring uniform mixing of active materials, conductive additives, binders, and solvents. Even distribution of components is critical for electrochemical performance. | Eliminates agglomerates and ensures homogeneous electrode coating, enhancing battery capacity and cycle life. |
| Nanomaterial Research | Lab-scale synthesis and deagglomeration of nanoparticles, carbon nanotubes, and other advanced nanocomposites for material science studies. The controlled shear environment preserves nanostructure integrity. | Gentle yet effective grinding achieves desired fineness without destroying delicate nanoparticle morphology. |
| Cosmetics and Personal Care | Preparation of creams, lotions, and suspensions with ultrafine particle actives (e.g., sunscreens, pigments) for improved texture, appearance, and absorption. The mill produces stable emulsions with no gritty feel. | Produces smooth, stable emulsions with consistent quality, meeting stringent cosmetic industry standards. |
| Adhesives and Sealants | Wet grinding of fillers and additives in medium to high viscosity adhesive formulations to enhance bonding strength and application properties. The even dispersion prevents filler sedimentation and ensures uniform rheology. | Ensures even distribution of fillers, preventing settling during storage and maintaining consistent product performance. |
| Food and Nutraceutical Processing | Grinding of food ingredients, flavor particles, and nutraceutical suspensions in viscous carriers. The enclosed, easy-to-clean design meets the hygiene requirements of food-grade R&D environments. | Achieves fine, uniform dispersions while minimizing contamination and simplifying changeover between batches. |
Technical Specifications
| Parameter | Value |
|---|---|
| Model | PP-SBM04 |
| Function | Dispersion and Grinding |
| Material Suitability | Viscous slurries |
| Grinding Basket Volume | 0.35 L |
| Grinding Chamber Volume | 3 L |
| Processing Capacity | 1–3 L |
| Grinding Method | Wet milling |
| Grinding Media Material | Zirconia (ZrO₂) |
| Rotational Speed | 140–2800 rpm |
| Motor Power | 0.75 kW |
| Lifting Method | Manual lift |
| Optional Temperature Control | Available on request |
Why Choose This Product
- Superior Grinding Efficiency Through Optimized Recirculation: The unique self-priming recirculation design is the cornerstone of this mill's performance. Unlike conventional basket mills that rely on simple agitation, this system actively circulates the entire batch through the grinding chamber, ensuring every particle is exposed to the high-energy bead zone multiple times. This continuous turnover eliminates dead spots, guaranteeing that no portion of the slurry remains unprocessed. As a result, users achieve dramatically narrower particle size distributions and can often reach target fineness in a fraction of the time required by other lab mills.
- Robust and Compact Construction for Long-Term Reliability: Precision-machined from high-grade stainless steel, this mill is built to withstand the rigors of daily academic and industrial use. Its hollow-shaft drive minimizes the number of moving parts, reducing wear and potential failure points. The balanced rotor and sturdy base ensure vibration-free operation, extending the life of both the equipment and surrounding sensitive instruments. This robust engineering translates into years of dependable service with minimal maintenance.
- Unmatched Flexibility for Diverse R&D Applications: A premium variable frequency drive with stepless speed control allows operators to tailor shear intensity to the specific rheology of their slurry, from low-viscosity dispersions to thick pastes. Optional cooling or heating jackets enable processing of temperature-sensitive materials, while the ability to swap dispersing blades lets users optimize for either high-shear dispersion or gentler mixing. This adaptability makes the mill a versatile workhorse that can evolve with your research program, eliminating the need for multiple specialized units.
- Low Operational Cost and Easy Maintenance: The small grinding media charge (0.35 L of zirconia beads) represents a modest recurring cost, and the highly wear-resistant beads provide extended service life. Following grinding, the basket and chamber clean up quickly with minimal solvent, reducing cleanup time and solvent waste. The manual lift mechanism simplifies vessel handling and speeds batch changeover. All of these features contribute to a low total cost of ownership, making it an economical choice for budget-conscious labs.
- Dedicated Application Support and Customization: From process optimization to after-sales service, our experienced engineers are available to help you get the most out of this mill. Whether you need advice on bead size selection, assistance with scale-up studies, or a custom vessel design for unique formulations, we provide responsive, knowledgeable support. We also offer validation documentation and integration assistance for regulated environments. Contact us today to discuss your specific requirements and receive a personalized quote or demonstration.
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