Key Structural Advantages And Working Principles of Ultrafine Pulverizers

Ultrafine pulverizers feature a uniquely engineered classification chamber and precision classification wheel, ensuring stable and uniform particle size.  The vertical classifier wheel is equipped with variable frequency speed control, allowing efficient particle classification even at low rotational speeds—without the need for traditional sieves.

The circulating feeding structure strictly restricts oversized particles and prevents over-grinding, resulting in a narrower particle size distribution and higher mean particle accuracy.

The use of a classifier wheel also eliminates the common issue of powders above 150 mesh failing to pass through traditional screens.

Main Wear Parts of Ultrafine Pulverizers

Key wear components include flat teeth, round teeth, and large/small grinding teeth.

These components are made from stainless steel with excellent dynamic balance.  When wear becomes significant, they should be replaced promptly.  For self-fabricated parts, the dimensions must strictly follow the original specifications, and the weight deviation between any two pieces must not exceed 1 gram to avoid vibration that may damage the bearings and the machine body.

Application of Ultrafine Grinding in Lithium Battery Materials

• Currently, commonly used cathode materials for lithium batteries include:

• Lithium cobalt oxide (LCO)

• Lithium nickel oxide (LNO)

• Lithium manganese oxide (LMO)

• NCM/NCA ternary materials

• Lithium iron phosphate (LFP)

The crushing and refinement of these cathode materials is a critical process.  Widely used equipment includes jet mills, mechanical mills, and sand mills.

As battery capacity increases, internal energy and temperature rise during operation.  Under extreme conditions, short circuits may occur, leading to battery failure.  The application of high-purity ultrafine alumina coatings on PP, PE, or multilayer composite separators significantly improves thermal stability and enhances battery safety—these coating powders are typically produced using ultrafine pulverizers.

Working Principle of Ultrafine Pulverizers

The machine operates based on high-speed airflow.  Compressed air enters the grinding chamber and accelerates the particles, causing them to collide, shear, and rub against one another at high speed, achieving ultrafine grinding.  This technology is suitable for various chemical materials and non-metallic minerals.

Classification System in Jet Mills

The jet mill process involves not only ultrafine grinding, but also a critical air classification system:

• Ground material enters the classifier chamber.

• The classifier wheel separates particles based on rotational speed.

• Fine particles that meet size requirements are collected.

• Oversized particles are returned to the grinding zone for further pulverization.

This continuous cycle ensures that the final powder meets the required particle size specification, with narrow distribution and high consistency.