Wheel Grinding Roller

High Output & Stability

Our premium wheel grinding roller for vrm with annular groove table features large diameter, extensive contact area, and reversible design.

Wheel Grinding Roller VRM Wheel Roller Annular Groove Tire Type Grinding Roller High Output VRM Roller +2 More

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Wheel Grinding Roller

High Output & Stability

Our premium wheel grinding roller for vrm with annular groove table features large diameter, extensive contact area, and reversible design.

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The wheel grinding roller is often used together with the annular groove grinding plate (table), and its central vertical section is tangent to the grinding plate. It is characterized by the large diameter of the grinding roll and close contact with the annular groove grinding disc. The contact area between the grinding roll and the material is large, the grinding amount is large, and the output is high and stable; It can also be turned over for use, with less wear and longer service life. This tire-type or wheel-shaped design (common in FL Smidth-style or similar VRMs) excels in high-volume, stable comminution through broad pressure distribution and reversible segments.

Features & Benefits

Compared to conical designs, the VRM wheel roller annular groove configuration offers distinct advantages for output-focused applications:

Large roller diameter and extensive contact area for superior material throughput
Close, tangent contact with annular groove for even pressure and stable grinding
High output with minimal fluctuations, ideal for consistent production
Reversible (turn-over) segments to extend usable life and reduce wear

Excellent wear resistance via high chromium cast iron or hardfacing
Reduced uneven wear due to broad distribution of grinding forces
Up to 20-30% higher throughput in suitable setups vs. narrower contact designs
Longer service life through reversible use, lowering replacement frequency and costs

These traits make wheel rollers preferred in mills emphasizing reliability, high capacity, and cost-effective longevity over speed-focused designs.

Technical Specifications

Parameter	Details
Roller Design	Wheel-shaped / Tire-type (pairs with annular groove grinding table)
Contact Characteristic	Central vertical section tangent to plate; large diameter & close contact
Material Options	High Chromium Cast Iron, Hardfaced Alloy Steel (e.g., 42CrMo base)
Hardfacing Hardness	HRC 56-65
Wear Layer Thickness	15-20 mm typical (hardfaced variants)
Key Advantages	Large contact area, high stable output, reversible for extended life
Compatibility	FL Smidth-type, Polysius, or similar VRMs; customized per drawings
Condition	Brand New / OEM Equivalent

Wheel Grinding Roller - Common Material Types

Wheel Grinding Roller, are manufactured using different material compositions depending on the application, operating conditions, and performance requirements:

Composite Cast Structure

Often ceramic block inlaid roller sleeves, consisting of three layers: ductile iron (base), high-chromium cast iron (intermediate), and wear-resistant ceramic blocks (outer layer). This design balances high hardness with excellent toughness.

High-Hardness Cast Iron

Includes Ni-hard cast iron and high-chromium cast iron, achieving hardness above 58 HRC. Offers strong wear resistance but lower toughness, with potential for cracking under heavy impact.

Alloy Cast Steel

Such as ZG30Mn cast steel, optimized for improved hardness and wear resistance. Many undergo arc gouging finishing and non-destructive testing (ultrasonic, magnetic particle, dye penetrant) to ensure quality and extend service life.

Bimetal Centrifugal Casting

Outer layer uses alloy cast iron for high hardness and wear resistance, while the inner layer is gray cast iron for toughness and vibration absorption. The roller shaft is typically made of high-quality 45# carbon structural steel, assembled with interference fit for a strong, integrated structure.

Grinding Principle

Both vertical roller mills and roller presses operate based on the principle of material bed milling, ensuring efficient grinding through particle-to-particle interaction rather than direct metal contact.

Material Bed Milling Principle

During the grinding process, only a small portion of material particles directly contact the grinding components. Under applied pressure, the particles form a stable material bed. Through stress transmission and interaction between particles, the material is cracked, broken, and finely ground, resulting in high efficiency and reduced component wear.

Vertical Roller Mill Grinding Mechanism

In a vertical roller mill, the grinding components consist of rollers and a grinding disc. The grinding pressure is mainly generated by the rollers and is typically applied through a hydraulic loading system.

Material is fed onto the grinding disc from the center or side of the upper housing. As the disc rotates, a uniform material layer is formed. When the material passes between the rollers and the grinding disc, it is ground under combined extrusion and shear forces.

Roller Press Grinding Mechanism

A roller press uses two rollers of equal size as the grinding components. Material falls vertically from the top and forms a compact material bed between the rollers. Under the high extrusion force applied by the rollers, the material is compressed and ground into fine particles.

Roller presses are available in two drive configurations: double drive and single drive. The double drive roller press, where both rollers are independently driven, is the most commonly used design. In a single drive configuration, one roller is motor-driven, while the second roller is driven via a gear transmission.

Wheel Grinding Roller

Design Structure

There are fundamental differences between the design structures of vertical roller mills and roller presses, which directly influence grinding efficiency, energy utilization, and product fineness.

Vertical Roller Mill: The material on the grinding disc is restricted by the air duct ring, while the material between the roller and the disc is not laterally confined. The mill typically uses two or more grinding rollers, creating a large contact area between the rollers and the grinding disc. Materials are ground repeatedly on the disc, resulting in higher energy utilization efficiency.
Roller Press: In addition to the restriction between the two rollers, side baffles are installed at both ends of the rollers, fully confining the material bed. This all-around restriction allows increased applied energy to significantly raise fine powder content and specific surface area, making the roller press superior in terms of material fineness growth.
Grinding Characteristics: The roller press features a small contact area between rollers and material, but achieves a large grinding ratio, allowing materials to be ground effectively in a single pass. In contrast, vertical mills rely on repeated grinding cycles, offering more stable operation and higher overall energy efficiency.
Performance Comparison: From the perspective of fineness increase and specific surface area, the roller press shows clear advantages. From the standpoint of energy utilization and repeated grinding, the vertical roller mill demonstrates superior performance.