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 grinding cylinder incorporates a cooling jacket to manage thermal load during extended operation, requiring connection to a suitable coolant supply. Material selection for the grinding chamber and stirrer must be verified for chemical compatibility with the sample to avoid contamination or corrosive damage.
- Thermal Management: The cooling jacket must be connected to a temperature-controlled coolant loop when processing heat-sensitive materials or running continuously above ambient temperature.
- Material Compatibility: Optional cylinder and stirrer materials (stainless steel, corundum, polyurethane, zirconia, etc.) must be chosen to match the sample's chemical and abrasive properties to prevent leaching or wear.
- Electrical Safety: The variable frequency drive requires a grounded electrical supply with sufficient capacity to avoid voltage fluctuations that could damage the motor or control system.
- Grinding Media Selection: Grinding media diameter and material must be selected to achieve the target particle size without causing excessive media breakage or contamination of the product.
- Dust and Ventilation: Processing of dry powders may generate fine dust, requiring the mill to be placed in a ventilated enclosure or fume hood to maintain a safe breathing zone.
This procedure outlines the safe initialization and operation of the stirred ball mill for ultra-fine grinding of laboratory powder samples. Follow each step sequentially to achieve consistent particle size distribution while maintaining equipment integrity.
Required Equipment: JM-2L Stirred Ball Mill, Grinding Media (diameter ≤5 mm, material per sample), Coolant supply and circulation unit, Personal protective equipment (safety glasses, lab coat, gloves)
- Prepare the Mill
Verify that the grinding cylinder and stirrer are properly installed and secured, then fill the cylinder with the selected grinding media to approximately 70% of the cylinder volume. - Add Sample Material
Introduce the sample powder into the grinding cylinder, ensuring the total loaded volume does not exceed 0.7 L to maintain optimal grinding efficiency. - Set Process Parameters
Adjust the variable frequency speed controller to the desired rpm (50–1400 rpm) and set the grinding timer for the required duration based on target fineness. - Cooling Activation
Connect the cooling jacket to the coolant circulation unit and turn on the flow to maintain the cylinder temperature below 40°C during operation. - Start Grinding
Press the start button to begin rotation and monitor the mill for abnormal vibration or noise, adjusting speed if necessary. - Stop and Discharge
Once the timer ends, press stop and allow the stirrer to come to a complete halt before tilting the cylinder to discharge the ground product. - Clean and Inspect
Rinse the grinding cylinder and stirrer with an appropriate solvent to remove residual powder, then inspect for wear or damage to the lining and media.
How does the variable frequency speed control from 50 to 1400 rpm affect the achievable particle size in the JM-2L stirred ball mill?
The variable frequency drive allows continuous speed adjustment from 50 to 1400 rpm, directly controlling the kinetic energy of the grinding media. According to the working principle, higher speeds increase collision, extrusion, friction, and shear forces, enabling ultra-fine grinding down to ≤1 μm as specified. Lower speeds are suitable for coarser milling or less brittle materials.
Which grinding cylinder materials are compatible with the JM-2L for grinding zirconia or electronic materials without contamination?
The JM-2L supports optional grinding cylinders and stirring components made from materials including stainless steel, corundum ceramic, polyurethane, zirconia, agate, PTFE, and nylon. For zirconia grinding, a zirconia lining avoids cross-contamination and wear. For electronic materials, polyurethane or PTFE options minimize metal ion contamination.
What laboratory infrastructure is needed to operate the JM-2L stirred ball mill, and how is temperature managed during prolonged runs?
The JM-2L requires a standard electrical supply for its 0.37 kW motor and benchtop space for its 2L volume unit. The grinding cylinder is equipped with a jacket for precise temperature control, allowing cooling during extended operation. The automatic stir rod lifting and tiltable cylinder facilitate easy media and sample handling without special ventilation or safety enclosures.
The Atomfair JM-2L stirred ball mill delivers ultra-fine grinding to ≤1 μm via variable frequency speed control (50-1400 rpm) and a jacketed cylinder for precise temperature regulation, but its effective working capacity is only 0.7L per batch, and material selection for the grinding chamber is critical to avoid contamination.
Positive
- High energy utilization and power density: The mill's design achieves outstanding energy-saving performance through high energy utilization and high power density, reducing operational costs during extended use.
- Precise temperature control via jacketed cylinder: The grinding cylinder is equipped with a cooling jacket, allowing accurate regulation of the grinding temperature, which is critical for heat-sensitive materials and consistent process conditions.
Trade-offs
- Limited working capacity relative to vessel volume: The JM-2L has a total volume of 2L but a loading capacity of only 0.7L, meaning the effective grinding chamber must accommodate both grinding media and material, reducing throughput per batch and requiring careful proportioning.
- Material contamination and wear considerations: The mill requires selection of appropriate grinding cylinder and stirrer materials (e.g., stainless steel, ceramic, polyurethane, zirconia) to avoid sample contamination and to match the abrasiveness of the material being ground, adding complexity to process setup.
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).
