Grinding Media

Grinding media is a kind of carrier used in ball millcement mill, mineral mill and other equipment to help grind materials. Commonly used grinding media are steel grinding balls, grinding cylpebs, and steel grinding rods. The materials for making such grinding media are mostly cast iron alloys, alloy round steels, etc. that have been specially processed.

grinding media

Steel Grinding Balls

1. Cast grinding balls

  • Chromium content: 1% – 28%
  • Hardness: HRC40-60
  • Diameter: 10mm-150mm
  • Features: after heat treatment, it has high hardness, grinding resistance and no loss of roundness
  • Application: cast grinding balls are widely used in ball mill grinding systems in mining, cement, building materials, chemical industry and other fields.
Grinding balls

 

NameGradeSurface hardness(HRC)Bulk hardness(HRC)Impact value(Ak:J/cm2)Metallographic structureFalling Ball Impact Fatigue Life
(height 3.5 meters)
Low Chromium Grinding Balls
(LCCB)
ZQCR1, ZQCR2, ZQCR345-5045-49≥1.5P+C80≤φ≤1508000
ZQCR040-4540-44≥1.2P+C
P-Pearlite, C-Carbide
High Chromium Grinding Steel BallsZQCR10-ZQCR1258-6358-62≥3M+C80≤φ≤15010000
ZQCR13-ZQCR1659-6459-63
ZQRC17-ZQCR1960-6560-64
M-Martensite, C-Carbide

2. Forged grinding balls

  • Carbon content: 0.38% – 1.05%
  • Hardness: HRC48-65
  • Diameter: 10mm-150mm
  • Features: after quenching, it has high hardness, abrasion resistance and low damage rate
  • Application: forged grinding balls are widely used in ball mills and SAG grinding mill systems in mining, building materials, chemical industry and other fields.
Steel Grinding Balls
Grade Model(mm) Surface hardness(HRC) Inner hardness(HRC) Bulk hardness(HRC) Impact value(Ak:J/cm2) Metallographic structure Falling Ball Impact Fatigue Life
(height 3.5 meters)
SGFB-3
φ40-φ50 60-65 59-64 60-65 ≥13 M+B+C 80≤φ≤150 ≥10000
φ60-φ80 60-65 58-63 60-65
φ90 59-64 59-63 59-63
φ100-φ120 53-58 47-52 50-55
φ125-φ130 51-56 45-50 47-52
φ140-φ150 48-53 40-45 45-50
M-Martensite, C-Carbide

Grinding Cylpebs

1. Cast grinding cylpebs

  • Chromium content: 1% – 28%
  • Hardness: HRC40-65
  • Specifications: φ10mm×H12mm – φ50mm×H60mm
  • Application: cast grinding cylpebs are widely used in ball mill grinding systems in cement, building materials, thermal power plants and other fields.
steel grinding cylpebs
Name Grade Surface hardness(HRC) Bulk hardness(HRC) Impact value(Ak:J/cm2) Metallographic structure
Low chromium cast grinding cylpebs ZQCR1-ZQCR3 45-50 45-49 ≥1.5 P+C
ZQCR0 40-45 40-44
P-Pearlite, C-Carbide

2. Forged grinding cylpebs

  • Carbon content: 0.35% – 0.70%
  • Hardness: HRC45-62
  • Specifications: φ20mm×H25mm – φ50mm×H60mm
  • Application: forged grinding cylpebs are commonly used for grinding non-ferrous metal ores such as gold and copper mines, as well as coal mills in power plants and grinding in cement industry.
grinding steel cylpeb
Name Grade Surface hardness(HRC) Impact value(Ak:J/cm2) Metallographic structure
Forged grinding cylpebs SGFC=1 50-60 ≥11 M+B+C
M-Martensite, B-Bainite, P-Pearlite, C-Carbide

Grinding Rods

1. High manganese steel wear resistant grinding rods

  • Carbon content: 0.45% – 0.70%
  • Diameter: 40mm-120mm
  • Features: after quenching and tempering, it has the characteristics of high hardness, good toughness, grinding resistance and continuous rod
  • Application field: high manganese steel rod is used in the grinding of rod mills such as silver ore, bauxite, quartz placer and building materials.
steel grinding rods

2. Alloy steel wear resistant grinding rods

  • Carbon content: 0.37% – 1.05%
  • Diameter: 40mm-120mm
  • Length: 2m-6m
  • Features: after quenching and quenching and tempering, the hardness and wear resistance of the product match scientifically
  • Application: alloy steel rods are widely used in the grinding of rod mills such as copper, gold, lead-zinc and quartz placers.
grinding steel rod
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