Dry rod mill and wet rod mill are two types of equipment commonly used in mineral processing. Their core differences are reflected in structural design, working principle and applicable scenarios. The specific comparison is as follows:

1. Structural design differences

‌Discharge port and auxiliary device‌:

The discharge port of the dry rod mill is straight and equipped with an air induced device, dust exhaust pipe and dust collector to deal with dust problems‌.

The discharge port of the wet rod mill is trumpet-shaped, with a built-in spiral device to facilitate the discharge of water-containing slurry without the need for additional dust removal equipment‌.

‌Internal structure complexity‌:

Dry equipment has a more complex structure due to the need to control dust; the wet structure is relatively simple and relies on water flow to assist discharge‌.

2. Comparison of working principles

‌Grinding media and material handling‌:

Dry rod mills rely entirely on the impact and grinding of dry materials by steel rods, and qualified products are brought out by air flow‌.

Wet rod mills need to add water or anhydrous ethanol to drive the material to move through water flow, and the grinding concentration needs to be adjusted according to the properties of the ore‌.

‌Power transmission method‌:

Both drive the cylinder to rotate through the motor-driven gear system, but the wet type has higher requirements for the sealing of the transmission parts due to the presence of liquid media.

3. Applicable scenarios and performance characteristics

‌Applicable material types‌:

The dry type is suitable for water-sensitive materials (such as cement, marble) or occasions where dry powder storage is required to avoid chemical reactions caused by water‌78.

The wet type is mostly used in ore processing (such as metal ores and non-metallic ores), and water flow can improve grinding efficiency and reduce dust pollution‌.

‌Energy consumption and cost‌:

Due to the need for dust treatment, the dry type has a higher equipment investment; and the energy consumption is 25%-30% higher than the wet type at the same output‌.

Although the wet type has high grinding efficiency, it requires supporting dehydration or drying equipment, which indirectly increases the cost of later processing.

4. Selection basis

The user needs to make a comprehensive decision based on the material properties, finished product requirements and production environment: if the material is easy to deteriorate when exposed to water or needs to be in dry powder form, dry type is preferred; if efficient grinding is pursued and wet material processing is allowed, wet type is better.

In summary, dry and wet rod mills have different focuses in structure, principle and applicability. In practical applications, the selection should be made based on specific process requirements.