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 mill requires a dedicated power supply and proper grounding to manage its 3 kW motor electrical load safely. The grinding chamber temperature must be regulated via the integrated cooling jacket to prevent thermal degradation of materials.
- Electrical Requirements: Connect the mill to a dedicated circuit with appropriate overcurrent protection for the motor rating.
- Thermal Management: Circulate coolant through the jacket to maintain the grinding chamber within the recommended temperature range.
- Material Compatibility: Select grinding cylinder and stirrer materials chemically compatible with the process material to avoid corrosion or contamination.
- Mechanical Limits: Operate the mill only within the specified speed range (60–310 rpm) to avoid excessive vibration or mechanical stress.
This procedure outlines the safe initialization and operation of the stirred mill for batch grinding. Follow the steps in sequence to ensure proper loading, configuration, and processing.
Required Equipment: Grinding media of appropriate size and material, Process material within feed size specification, Coolant supply for jacket temperature control
- Load grinding media
Fill the grinding cylinder with small-diameter media to approximately one-third of the mill's effective volume. - Add process material
Introduce the material to be ground into the cylinder, ensuring the total load does not exceed the 10.5 L loading capacity. - Lower stirring rod
Actuate the automatic lifting mechanism to lower the stirring rod into the grinding chamber until engaged. - Set rotation speed
Adjust the frequency converter to the desired rotational speed within the 60–310 rpm range based on the target fineness. - Activate cooling system
Start the coolant flow through the jacket to maintain thermal stability during the grinding process. - Start motor
Initiate the motor and allow the mill to run for the predetermined residence time required to achieve ≤1 μm discharge. - Unload product
Stop the motor, lift the stirring rod, and tilt the grinding cylinder to discharge the ground material.
How does grinding media size selection impact final particle size distribution in the JM-30L stirred mill?
Larger grinding media produce coarser particles while smaller media yield finer powders down to ≤1 μm as specified for this mill series. The working principle describes that collision, extrusion, friction and shearing forces from irregular media motion determine grinding efficiency; combining different media sizes with appropriate speed adjustment optimizes performance.
Can the JM-30L stirred mill process abrasive ceramic powders without introducing metal contamination?
Yes, the mill offers optional grinding cylinders and stirring components made of corundum ceramic, polyurethane, or zirconia to eliminate metal contact with the sample. These wear-resistant linings are explicitly listed as available materials for the JM-30L model.
What cooling system is needed to maintain stable grinding temperatures during extended runs on the JM-30L?
The grinding cylinder is designed with a jacket that allows precise control of the grinding temperature by circulating coolant. This feature supports continuous or batch production without thermal degradation of heat-sensitive materials.
The Atomfair JM-30L lab stirred mill delivers energy-efficient ultra-fine grinding to ≤1 μm with a 30 L jacketed cylinder and interchangeable wear-resistant liners, making it suitable for multi-material R&D and small-batch production; however, operation requires external cooling infrastructure and careful media selection to achieve optimal performance.
Positive
- High energy utilization and power density: The stirred mill achieves outstanding energy-saving performance through high energy utilization and power density, reducing overall electrical consumption during fine grinding operations.
- Multi-material wear component compatibility: Optional grinding cylinders and stirring rods in stainless steel, corundum ceramic, polyurethane, and zirconia enable adaptation to diverse material chemistries while minimizing cross-contamination.
Trade-offs
- Requires external cooling fluid system: The jacketed grinding cylinder relies on a connected coolant or heating circuit to control grinding temperature, adding infrastructure and maintenance complexity.
- Process optimization depends on media selection: Achieving the target fineness requires careful choice of grinding media size, shape, and ratio along with speed adjustment, necessitating operator experience and iterative trials.
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).
