Product Category

Grinding Cylpebs

Our grinding cylpebs provide multi-surface contact and stable wear performance for efficient fine and ultra-fine grinding.

Key Specifications

  • Material: High-chromium cast iron
  • Hardness: HRC 58–66
  • Surface-to-Core Hardness Difference: ≤2 HRC
  • Breakage Rate: ≤0.5%

Applications

  • Fine & Ultra-Fine Grinding
  • Iron Ore
  • Copper-Gold Ore
  • Cement Clinker
  • Fly Ash & Quartz Sand
Availability:
Quantity:
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Chemical Composition

Name(%)
CSiMnCrPSAlMoCuNi
Low chromium cast ball2.0~3.51.0~1.80.3~0.80.3~1.0≤0.15≤0.25    
Ball chromium cast in2.0~3.31.0~1.20.3~0.83.0~8.0≤0.15≤0.15    
High chromium cast ball1.8~3.30.3~1.00.3~1.010~11≤0.10≤0.10   

Mechanical Properties And Microstructure

 NameHardness (HRC) Metallographic organization
Low chromium micro section45~50P+C
Chrome micro period in45~50(56~60)P+C
High chrome micro section58~66M+C
C – carbideP – pearliteM – martensite

Advantages of Unique Shape and Structure (Key Differentiators vs. Steel Balls)

Multi-faceted contact for higher grinding efficiency
The cylindrical structure offers dual contact surfaces—flat faces and curved sides—providing significantly more contact points with the material than spherical steel balls. This enables simultaneous coarse crushing and fine grinding, resulting in more uniform powder fineness and reduced over-grinding. Hourly mill output increases by 10%–25%, making it particularly suitable for fine and ultra-fine grinding stages.
Minimal slippage and stable grading
While steel balls tend to slide and spin idly within the mill, the cylindrical structure of steel segments provides strong interlocking friction. They rotate without significant slippage, effectively utilizing kinetic energy and avoiding wasteful collisions, which lowers energy consumption and yields significant electricity savings.
Durable grading and resistance to segregation
With controllable length and diameter specifications, these segments do not suffer from the stratified accumulation of large and small media often seen with balls. They maintain a stable grinding mix during long-term operation, eliminating the need for frequent shutdowns to adjust the media ratio.
Wear-resistant end faces and no rapid loss of shape
As steel balls wear, their diameter shrinks and the risk of breakage rises; in contrast, steel segments wear uniformly across the entire body—with simultaneous consumption of end faces and side walls—maintaining their grinding shape over time and ensuring a gradual, predictable decline in service life.

Physical Material Properties

High-chrome alloy with balanced hardness
Formulated from high-chromium cast iron, the material achieves a uniform hardness of HRC 58–66, with a hardness differential of ≤2 HRC between the surface and the core. It offers excellent toughness, balancing high wear resistance with impact resistance, making it ideal for fine grinding operations involving low-to-medium impact.
Low breakage rate and minimal spalling
Manufactured via precision metal mold casting followed by fully automated oil-quench and temper heat treatment, the process eliminates internal casting stresses and ensures a dense grain structure. The breakage rate is controlled to within 0.5%, preventing the generation of excessive debris that could clog screening equipment or contaminate the slurry.
Corrosion resistance suitable for wet grinding
The chromium content forms a dense passivation film, providing resistance to rust and electrochemical corrosion in acidic or alkaline slurries and wet cement grinding environments. Media loss remains stable, and the material does not flake off rapidly to introduce iron impurities.
High-Density Grinding Media
With a density of 7.5–7.8 g/cm³, the media's own weight generates substantial grinding and crushing force, delivering outstanding grinding performance on hard materials such as iron ore, copper-gold ore, cement clinker, fly ash, and quartz sand.

Manufacturing Advantages

Comprehensive range of specifications; customizable upon request
Standard sizes range from φ10×10mm to φ60×70mm; chromium content is customizable (high, medium, or low-chrome series); lengths and diameters can be tailored via custom mold-making to suit specific mill operating conditions.
Precision casting; tight dimensional tolerances
Produced via metal mold casting, resulting in flat end faces and smooth outer surfaces free from porosity or sand holes; minimal unit weight variance ensures uniform and stable mill loading.
Recyclable
Spent steel grinding media can be remelted and recast, reducing industrial solid waste and long-term procurement costs while meeting green production and environmental standards for the mining and construction material industries.

Operational Cost-Saving Advantages

Ultra-low wear rates; significantly extended replenishment intervals
Wear rates are as low as 0.09–0.22g/cm³ per 1,000 hours; durability far exceeds that of standard forged or low-chrome steel media, reducing the frequency of manual media charging and minimizing downtime for maintenance.
Protects mill liners; extends equipment lifespan
Unlike steel balls that impact at a single point, steel grinding media provide surface-to-surface impact, exerting gentler force on mill liners and partition plates; liner wear rates are reduced by approximately 20%, lowering costs associated with equipment part replacements.

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Contact Us

 Tel: +86-17729951693 (WeChat)
 E-mail: ngjqnm@163.com
 WhatsApp: +8617729951693
Add: Ning pier ningguo city industrial development zone

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