What are differences between dry grinding and wet grinding of ball mill ?

Dry grinding of Ball Mill

For dry grinding, since no water or other liquids are added during the dry grinding process, the original characteristics of the material, such as shape, size and physical properties, can be better maintained. In addition, the discharge port of dry grinding is straight-cylindrical, which makes the material discharging more smoothly, will not cause the grinding to become mushy or bloated, and has a low failure rate. However, since dry grinding requires the addition of auxiliary equipment such as air induction devices, dust exhaust pipes, and dust collectors, its structure is much more complex and the cost is higher than that of wet ball mills. In addition, because dry ball mills need to dry materials before grinding them, they consume more energy and time.

The advantages of dry grinding include

1、There is no need to add water during the dry grinding process, which can save water resources and costs.

2、The discharge port of dry grinding is straight-cylindrical, and the grate-type grinding tail is used to discharge the material. The material is discharged evenly and smoothly, with a low failure rate and will not cause mushy grinding or swelling.

3、The auxiliary equipment of dry ball mill includes air induction device, dust exhaust pipe, dust collector, etc., which can avoid pollution caused by dust.

Wet grinding of Ball Mill

For wet grinding, the advantage is that water or other liquid media can be added to better moisten and disperse the material, which is beneficial to improving crushing efficiency and fineness. In addition, the wet ball mill does not need to add too many auxiliary equipment, has a relatively simple structure and low cost. However, since liquid media is added during the wet grinding process, the grinding concentration needs to be controlled to avoid affecting product quality and production efficiency. In addition, the discharge port of the wet ball mill is trumpet-shaped and requires a built-in spiral device to facilitate the discharge of materials, which may increase the complexity and failure rate of the equipment.

The advantages of wet grinding include

1、The wet ball mill has the advantages of strong adaptability to materials, continuous production, large crushing ratio, and easy speed adjustment to grind the fineness of the product.

2、The discharge port of the wet ball mill is trumpet-shaped and has a built-in spiral device for easy discharge. It has high grinding fineness and good mineral processing effect.

3、Adding water during the grinding process of the wet ball mill can prevent the material from entering the dead corner and not being ground, and also avoids dust pollution.

4、The wet ball mill has high crushing efficiency, wide application range, can produce continuously, and the fineness of the finished material can also be adjusted.

5、The wet ball mill can also effectively avoid the “closure” phenomenon of mineral cracks.


The choice of dry grinding or wet grinding in a ball mill needs to be comprehensively considered based on factors such as the nature of the material, production requirements, and cost. For materials that need to maintain their original characteristics, be discharged smoothly, and have low fineness requirements, you can choose dry grinding; for materials that need to improve crushing efficiency, have higher fineness requirements, or need to add liquid media, you can choose wet grinding. No matter which method you choose, you need to make judgments and choices based on the specific circumstances.

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