



A three-roll mill is a wet grinding and dispersing industrial device specifically designed for processing high-viscosity paste/slurry materials. Its core feature is that it has three horizontally parallel rollers.
The three rollers are a slow roller, a medium roller, and a fast roller. Adjacent rollers rotate in opposite directions, with their speeds increasing progressively, and the gaps between the rollers are extremely small:
1. The material first falls into the gap between the slow and medium rollers, where it is subjected to the squeezing force of the roller surfaces;
2. The speed difference creates extremely strong shear friction, tearing apart clumps of pigments and powder particles within the material;
3. The material then transitions from the medium roller to the faster fast roller, completing a secondary fine grinding process. Finally, a scraper removes the ground product from the fast roller.
Grinding three times achieves a particle size of 3~18μm, with excellent fineness control.

| Parameters of S Series Three-Roll Mill | |||||||||
| Parameter\Model | S65 | S100 | S150 | S200 | S260 | S315 | S405 | SM405 | |
| Roll Diameter (mm) | 65 | 100 | 150 | 200 | 260 | 315 | 405 | 405 | |
| Working Surface Length (mm) | 125 | 250 | 300 | 500 | 695 | 755 | 810 | 1000 | |
| Roll Speed (rpm) | Slow Roll | 32 | 34 | 28 | 19 | 19 | 19 | 15 | 15 |
| Middle Roll | 89 | 78 | 66 | 55 | 55 | 55 | 45 | 45 | |
| Fast Roll | 250 | 181 | 152 | 155 | 155 | 155 | 135 | 135 | |
| Motor Power (kW) | 0.75 | 1.1 | 2.2 | 4 | 7.5 | 11 | 15 | 22 | |
| Finished Product Fineness | 3-18um/3 times | ||||||||
| Reference Efficiency | 5 | 30 | 60 | 100 | 180 | 250 | 350 | 430 | |
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