Alumina Ultrafine Grinding Project in Australia

Customer Background
The customer is a leading Australian supplier of advanced ceramics and thermal conductivity materials. Alumina Ultrafine Grinding is critical for this application, as the particle size distribution of alumina directly determines the sintering density and mechanical strength of end products such as ceramic substrates, precision polishing slurries, and thermal conductive fillers.

Core Requirements

• Extreme fineness: The target particle size must reach D97: 2.07 μm, entering the submicron processing range.
• High-purity protection: Alumina has extremely high hardness (Mohs hardness 9). During processing, it is essential to prevent metal contamination caused by equipment wear.
• Kiểm soát chặt chẽ các hạt thô: Particles larger than 5 μm are absolutely not allowed, as they may cause scratches or defects during end use.

Giải pháp: Bột Epic Dedicated Jet Milling System

To meet the high hardness and high purity requirements of alumina, Epic Powder provided a customized MQW Series Fluidized Bed Jet Mill system solution.

1. Targeted Technical Configuration

• Full ceramic lining protection: To withstand the strong abrasiveness of alumina, the inner walls of the grinding chamber, nozzles, and classifier blades are all made of alumina ceramic or silicon carbide. This not only significantly extends equipment service life, but also ensures zero metal contamination during processing.
• Supersonic airflow grinding: Using 3–4 Laval nozzles to generate supersonic airflow, alumina particles undergo intense collisions at the airflow convergence zone. This “particle-on-particle” grinding principle greatly reduces wear on equipment components.
• High-speed precision classification: Equipped with the latest generation high-speed horizontal classifier wheel. Through variable-frequency control, the cut point is precisely adjusted to ensure D97 is stably maintained at 2.07 μm.

2. Test and Production Data for Alumina Ultrafine Grinding Line