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Jiangyin Dongbang Steel Ball Machinery Co.,Ltd

ADD:NO.42 Hua Lu Road, Huashi Town, Jiangyin City, Jiangsu Province

Tel:86-0510-86370386

Mobile:86-13812104338

Fax:86-0510-86370552

Email:grindingballsmedia@163.com

Steel Balls for Ball Mill

S teel B alls F or B all M ill Introduction “DongBang” brand steel balls for ball mill , your best choice for gold ore mine mineral processing, high and even hardness can support you to reduce ball consumption 10-20% based on win-win cooperation. Technical Paremeters Applications: Steel Balls...

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  • Product Details

Steel Balls For Ball Mill Introduction 
“DongBang” brand steel balls for ball mill , your best choice for gold ore mine mineral processing, high and even hardness can support you to reduce ball consumption 10-20% based on win-win cooperation.
图片110.png 
Technical Paremeters
Applications: Steel Balls For Ball Mill
Certification: ISO9001, ISO14001, OHSAS18001 etc.
Original: Jiangsu, China
Price: Negotiable
Payment term: TT, LC
Delivery date: Negotiable
Packing: ton bag or Iron drum
Major Market: Middle East/ Africa/Asia/South America/Europe/North America
Ball Size: 25mm to 125mm (1” to 5”)
MOQ: 50 tons each size(2x20’GP)
Raw material: Alloy Steel rod

Steel Balls For Ball Mill Quality Parameters: 

                                                                                    Steel Rod Type: B2, Chemical Comments
                                                                                                     (Steel Balls For Ball Mill)

C

Si

Mn

P

S

Cr

0.76-0.82

0.17-0.35

0.72-0.80

≤0.020

≤0.015

0.50-0.60

Ni

Cu

Mo

Alt

V


≤0.25

≤0.20

None

0.020-0.050

None


25mm-30mm Steel Balls For Ball Mill Quality Performance

Ball Size

Surface Hardness

Core Hardness

Volume Hardness

25mm

63-64 HRC

62-63 HRC

62-64 HRC

30mm

63-64 HRC

62-63 HRC

62-64 HRC


Steel Rod Type: B2, Chemical Comments
     (Steel Balls For Ball Mill)

C

Si

Mn

P

S

Cr

0.76-0.82

0.17-0.35

0.72-0.80

≤0.020

≤0.015

0.50-0.60

Ni

Cu

Mo

Alt

V


≤0.25

≤0.20

None

0.020-0.050

None


40mm-50mm Steel Balls For Ball Mill Quality Performance

Ball Size

Surface Hardness

Core Hardness

Volume Hardness

40mm

62-64 HRC

61-63 HRC

61-64 HRC

50mm

61-64 HRC

60-63 HRC

60-63 HRC


Steel Rod Type: B6, Chemical Comments
     (Steel Balls For Ball Mill)

C

Si

Mn

P

S

Cr

0.74-0.85

0.15-0.35

0.90-1.05

≤0.022

≤0.020

0.88-1.0

Ni

Cu

Mo

Alt

V


≤0.25

≤0.25

0.06-0.13

0.025-0.045

/


60-90mm Steel Balls For Ball Mill Quality Performance

Ball Size

Surface Hardness

Core Hardness

Volume Hardness

Impact Toughness

60mm

62-64 HRC

59-61 HRC

59-62 HRC

≥14 J/CM2

70mm

62-64 HRC

59-61 HRC

59-62 HRC

≥16 J/CM2

80mm

61-63 HRC

58-60 HRC

59-62 HRC

≥18 J/CM2

90mm

61-63 HRC

58-60 HRC

59-62 HRC

≥20 J/CM2


Steel Rod Type: B6, Chemical Comments
     (Steel Balls For Ball Mill)

C

Si

Mn

P

S

Cr

0.74-0.85

0.15-0.35

0.90-1.05

≤0.022

≤0.020

0.88-1.0

Ni

Cu

Mo

Alt

V


≤0.25

≤0.25

0.06-0.13

0.025-0.045

/


100-125mm Steel Balls For Ball Mill Quality Performance

Ball Size

Surface Hardness

Core Hardness

Volume Hardness

Impact Toughness

100mm

60-62 HRC

57-60
     HRC

58-62
     HRC

≥22 J/CM2

120mm

60-62 HRC

57-60
     HRC

58-62
     HRC

≥24 J/CM2

125mm

60-62 HRC

57-60
     HRC

57-61
     HRC

≥26 J/CM2

Difference between hot rolled grinding balls and casted balls:

1. Difference in density

As hot rolled grinding balls are based on round steel rod, which is produced by hot rolled extrusion of square billets. During the production of hot rolled balls, they are formed and extruded by rollers, so the density of hot rolled grinding balls is usually more than 7.89. 

The casted balls, due to use of traditional casting process, it is hard to avoid pores and sand inclusions inside the casted balls and on the surface of them or casting trimming etc., so the density is usually around 7.45. 

图片111.png

2. Difference is quality uniformity

As hot rolled grinding balls adopt finished round steel and have unified quality, the round steel will pass through natural gas heating furnace(or induction furnace), rolling machine, quenching system, tempering furnace, cooling plate and packing machine etc., in which a mechanized flow line operating mode has been achieved in the whole production process. The temperature, speed and technical parameters are controlled by computer tracking and ensure the production to be stable and uniform. 

The steel scraps used for casted balls are likely to be uneven in material itself. Besides, the batching proportion of each furnace and casting speed are liable to influence of human factors and the quality of products is hard to keep stable. 

图片112.png

3. Difference in impact toughness and crus resistance

Due to high density and impact toughness≥18(J/CM2) of hot rolled grinding balls, the fatigue life of 6m height falling ball impact test is ≥ 20,000 times, so the breaking rate is quite lower. 

Generally, the impact toughness of casted balls is ≤4(J/CM2) due to pores and sand inclusions, it cannot be performed with falling ball impact test, so it has a higher breaking rate risk. 

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