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Differences Between Dry Grinding and Wet Grinding of Planetary Ball Mills
Release time:
Nov 01,2025
As the name suggests, dry grinding refers to directly grinding dry powder, while wet grinding can process liquid samples directly or dry powder samples with the addition of liquid reagents. Both grinding methods can be achieved by planetary ball mills! The specific differences between dry grinding and wet grinding are mainly reflected in the following aspects:
1. Working Principle
Dry Grinding: Without the participation of liquid media, materials are gradually crushed and refined through the impact, friction, and shearing effects of grinding balls and the ball mill jar.
Wet Grinding: Liquid media such as water or ethanol are added during the grinding process, and materials are crushed and refined with the involvement of these media. The liquid media help reduce friction and heat between the grinding balls and the jar, and can penetrate into the cracks of materials to prevent crack closure, thereby improving grinding efficiency.
2. Grinding Effect
Dry Grinding: The fineness of the ground powder is relatively low. Due to the lack of dispersion by liquid media, the powder is prone to agglomeration and caking.
Wet Grinding: The ground powder is finer with more uniform particle size. The processed products have a smooth surface and higher quality.
3. Production Capacity
Dry Grinding: Has low processing capacity, suitable for small-batch production scenarios.
Wet Grinding: Can effectively improve the production capacity of the ball mill, suitable for mass processing.
4. Application Scope
Dry Grinding: Suitable for grinding materials that are difficult to disperse in liquid media such as water or ethanol (e.g., metals, non-metals), as well as materials sensitive to moisture that may react with water (e.g., cement).
Wet Grinding: Usually suitable for grinding materials that are easy to disperse in liquid media such as water or ethanol (e.g., ceramic raw materials, ores, soil). In addition, it is more appropriate for materials that are prone to wall sticking, ball sticking, or have explosion risks during grinding (e.g., melamine, aluminum powder).
5. Equipment Structure
Dry Grinding: Usually adopts an open design with a straight cylindrical discharge port. It may be equipped with an air induction device for dust extraction and a dust collector and other auxiliary equipment to avoid dust pollution.
Wet Grinding: Adopts a closed design with a trumpet-shaped discharge port and a built-in spiral device to facilitate material discharge.
6. Post-Processing
Dry Grinding: The ground materials do not require drying treatment and can be directly used for subsequent operations.
Wet Grinding: The ground materials need to be dried to remove moisture or other liquid media, which may increase energy consumption and costs.
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