Description
Laboratory Stirred Ball Mill
Product Introduction
Stirred mills are mainly composed of a stationary grinding cylinder filled with small-diameter grinding media, a stirring device, and other auxiliary devices (such as circulation units, cooling units, timing and speed control systems, etc.). They feature high grinding efficiency and fine grinding particle size, which can well meet various process parameter requirements and simulate various indicators in actual production. Meanwhile, with the advantages of small-batch processing, low power consumption and cost-effectiveness, they are ideal equipment for universities, research institutes and enterprises to conduct research on grinding processes, new materials and coatings.
They are widely applied in the production of various fine powder materials in fields including zirconium silicate, zirconia, alumina, ceramics, chemical industry, electronic materials, magnetic materials, papermaking, coatings, non-metallic minerals, new materials, paints, graphite, calcium carbonate, pharmaceuticals and more.
Product Features
- High energy utilization rate and high power density, enabling outstanding energy-saving performance.
- Easy adjustment of product particle size; the fineness can be controlled by adjusting the residence time of materials in the cylinder.
- Low vibration and low noise during operation.
- Elegant and high-end appearance, reliable performance, simple maintenance, easy and labor-saving operation, and long service life.
- The stirring rod supports automatic lifting, and the grinding cylinder can be tilted freely.
- Capable of satisfying diverse process requirements, supporting continuous or batch production as needed.
- The grinding cylinder is designed with a jacket, allowing precise control of the grinding temperature.
- Customizable with various special functions, such as timing, speed regulation, circulation and temperature adjustment.
- Optional grinding cylinders and stirring components made of different materials (stainless steel, corundum ceramic, polyurethane, zirconia, etc.).
Technical Parameters
| Name | Speed (rpm) | Volume (L) | Loading Capacity (L) | Motor Power (kW) | Wear-Resistant Materials | Feed Particle Size (mm) | Discharge Particle Size (μm) | Speed Regulation Mode | Remarks |
| JM-1L | 50~1400 | 1 | 0.35 | 0.37 | Stainless steel, nylon, corundum, polyurethane, zirconia, agate, PTFE, etc. | ≤5 | ≤1 | Frequency conversion speed regulation | Laboratory Stirred Mill |
| JM-2L | 50~1400 | 2 | 0.7 | 0.37 | — | — | — | — | — |
| JM-3L | 50~1400 | 3 | 1.05 | 0.37 | — | — | — | — | — |
| JM-5L | 60~560 | 5 | 1.75 | 0.75 | — | ≤10 | — | Frequency conversion / fixed speed | Small Stirred Mill |
| JM-10L | 60~560 | 10 | 3.5 | 1.5 | — | — | — | — | — |
| JM-15L | 60~380 | 15 | 5.25 | 2.2 | — | — | — | — | — |
| JM-20L | 60~380 | 20 | 7.0 | 2.2 | — | — | — | — | Light-duty Stirred Mill |
| JM-30L | 60~310 | 30 | 10.5 | 3 | Carbon steel, stainless steel, lined with nylon, polyurethane, PTFE, corundum, etc. | — | — | — | — |
| JM-50L | 60~140 | 50 | 17.5 | 4 | — | ≤15 | — | — | Production Stirred Mill |
| JM-100L | 60~140 | 100 | 35 | 7.5 | — | — | — | — | — |
| JM-200L | 60~110 | 200 | 70 | 11 | — | — | — | — | — |
| JM-300L | 60~110 | 300 | 100 | 15 | — | — | — | — | — |
| JM-500L | 60~90 | 500 | 170 | 18.5 | — | — | — | — | — |
| JM-600L | 60~90 | 600 | 200 | 22 | — | — | — | — | — |
Working Principle
The main shaft drives the stirrer to rotate at a high speed, making the grinding media move irregularly. This chaotic motion generates collision, extrusion, friction and shearing forces between the grinding media, thus pulverizing and fine-grinding the materials.
In addition, different sizes, shapes and ratios of grinding media will lead to different grinding effects. Generally speaking, larger grinding media result in coarser particle size of the ground materials, while smaller media produce finer powder. A proper ratio of grinding media with different specifications, combined with appropriate speed adjustment, will achieve better grinding performance.
The stirred mill must be used within its mechanical and electrical limits to prevent injury and equipment damage. All operators must adhere to material compatibility and loading specifications to avoid chemical hazards and mechanical failure.
- Electrical and Mechanical Safety: Ensure the mill is connected to a grounded power outlet and that all guards are in place before operation.
- Grinding Media and Load Limits: Do not exceed the recommended loading capacity of 35% of nominal cylinder volume to prevent overpressure and excessive torque.
- Temperature Control: Connect the jacket cooling system with a suitable coolant flow to maintain operating temperature within material and equipment limits.
- Material Compatibility: Select grinding cylinder and stirrer materials that are chemically resistant to the processed material and solvents.
- Ventilation and Dust Control: Use in a well-ventilated area or with dust extraction when processing dry powders to mitigate inhalation hazards.
Follow these steps to safely initialize and operate the stirred mill for wet or dry grinding. Always wear appropriate personal protective equipment including safety glasses and gloves.
Required Equipment: Stirred Mill Unit, Coolant Supply System, Frequency Controller
- Prepare Workspace and PPE
Inspect the mill and cylinder for any damage and wear appropriate personal protective equipment. - Load Grinding Media and Material
Place the selected grinding media and process material into the clean grinding cylinder, ensuring total volume does not exceed 35% of cylinder capacity. - Secure Cylinder and Connect Coolant
Lock the grinding cylinder into position, tighten the lid, and attach coolant hoses to the jacket inlet and outlet. - Set Speed and Start Operation
Set the desired rotational speed on the frequency controller and start the mill, slowly ramping up to avoid splashing. - Monitor Grinding Process
Allow the mill to run for the predetermined duration, checking temperature and noise levels intermittently. - Stop Mill and Disconnect
Press stop, wait for complete standstill, then disconnect coolant and unlock the cylinder. - Discharge Product and Clean
Lift the stirring rod, tilt the cylinder to pour out the slurry, and rinse with appropriate solvent.
What is the trade-off between residence time and energy consumption when targeting sub-micron particle sizes with the Atomfair stirred mill?
Grinding fineness is directly controlled by adjusting the residence time of material in the grinding cylinder, with longer residence times yielding finer particles but increasing energy consumption per batch. The mill's high energy utilization rate and power density partially offset this trade-off, but for sub-micron targets (e.g., ≤1 μm as specified for the JM-1L), multiple passes or extended cycles may be required. The jacket cooling system also helps manage heat buildup during prolonged grinding.
Which grinding cylinder and stirrer materials are recommended for wet grinding of highly abrasive ceramic slurries to minimize metal contamination?
For wet grinding highly abrasive ceramic slurries, corundum ceramic or zirconia grinding cylinders and stirring components are recommended to eliminate metal contamination. The product description specifies that optional grinding cylinders and stirring components are available in materials including corundum ceramic, zirconia, polyurethane, and PTFE. Zirconia offers excellent wear resistance and inertness, making it suitable for ceramic and pharmaceutical applications where purity is critical.
What cooling and utility infrastructure is required to operate the JM-1L laboratory stirred mill at maximum speed (1400 rpm) for extended periods?
The JM-1L grinding cylinder is designed with a jacket that allows precise temperature control, requiring a connection to an external cooling water or chiller circuit. At maximum speed of 1400 rpm, heat generation from grinding media collisions can be significant, so adequate cooling flow is essential. The mill also requires a standard electrical supply for the 0.37 kW motor with frequency converter for speed regulation.
This laboratory stirred ball mill combines energy-saving high power density with customizable functions and multiple material options, but the effective batch volume is constrained to ~35% of the cylinder capacity and feed materials require pre-crushing to ≤5 mm or ≤15 mm depending on model.
Positive
- Energy-saving high power density: The mill achieves outstanding energy-saving performance through its high energy utilization rate and high power density, reducing operational costs.
- Customizable functions and material options: The mill supports timing, speed regulation, circulation, and temperature control, along with optional grinding cylinders and stirrers in materials like stainless steel, ceramic, or polyurethane for diverse application requirements.
Trade-offs
- Limited effective milling volume: The loading capacity is only about 35% of the total cylinder volume (e.g., 0.35 L for a 1 L mill), meaning a significant portion of the mill is occupied by grinding media, reducing batch throughput.
- Feed particle size constraint: Feed materials must be pre-crushed to ≤5 mm for laboratory models and up to ≤15 mm for larger production mills, necessitating an upstream size reduction step.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
