A Complete Guide! ZYE's Analysis of Four Main Roller Materials for Three-Roll Mills
2025-11-14 17:00
The roller is the "heart" of the three-roll mill, and its material directly affects grinding efficiency, product quality, and equipment lifespan. Different industries have significantly different requirements for roller hardness, necessitating targeted design based on process characteristics. For example, when grinding raw materials in the ceramic industry, high-hardness rollers are needed to quickly break down materials, whereas in the fine chemicals field, moderate hardness rollers are often required to balance efficiency and quality to avoid material degradation from over-grinding.
Furthermore, roller surfaces with different roughness levels act like "custom-designed tracks" for the material, influencing grinding efficiency and product quality at the microscopic level. Deviations in coaxiality and concentricity are also key factors affecting the grinding outcome.
The four main roller materials for ZYE 3 roll mills are alumina, zirconia, silicon nitride, and alloy steel. Each material has its unique characteristics and is suited for different process requirements, playing an irreplaceable role in their respective applicable fields.
Alloy Steel
As a classic roller material, alloy steel has a hardness of approximately HRC 58-62, sufficient for handling most conventional materials. It offers excellent toughness, withstanding a certain degree of accidental impact and avoiding the risk of brittle fracture. It is not prone to staining and is easy to clean, but it is not resistant to strong acids and alkalis and should avoid contact with media containing free fluoride ions. When processing high-hardness ceramic materials, there is a possibility of wear-induced blackening. Additionally, alloy steel has good machinability; it is easy to repair and regrind after wear, resulting in low maintenance costs.
Alumina
When process requirements exceed the capabilities of alloy steel, high-purity alumina ceramic becomes an ideal upgrade. Alumina rollers have a higher surface roughness, which helps improve grinding efficiency, but they are relatively prone to staining and slightly more difficult to clean. Therefore, they are more suitable for continuous production of a single product.
Zirconia
Zirconia is the densest material among the four common roller materials, allowing for greater line pressure and shear force. It is particularly suitable for dispersing and grinding high-viscosity, high-solid-content systems like lithium battery cathode and anode slurries, delivering exceptional efficiency. It has excellent corrosion resistance, is not easily stained, and is easy to clean, meeting the usage requirements for most high-end slurries.
Silicon Nitride
Silicon nitride possesses extremely high hardness, second only to diamond, making it an ideal choice for processing ultra-hard inorganic non-slurries. It is not easily stained, easy to clean, and offers stable and reliable performance.
Performance Comparison of Different Roller Materials
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