Ceramic grinding balls

1. Ceramic Alumina Grinding balls Name Ceramic Balls Alumina Balls High alumina Balls Ceramic Alumina Balls Alumina Grinding Balls Grinding Media Alumina Ceramic Grinding Media Alumina Balls For Ball Mill High Alumina Bricks High Alumina Linings Ceramic Bricks Ceramic Linings 2. Ceramic Alumina Grinding Balls Application Ceramic grinding balls mainly used in ceramic, porcelain glaze, glass, chemical industry. It is the grinding medium for ball mill,pot mill, vibration mill and other fine powder grinding equipment, its grinding and wear resistant efficiency is much better than the normal ceramic ball and nature stone. Mainly used in ceramic, porcelain glaze, glass, chemical industry. It also can be used for polishing of metal parts and grinding for nonmetal minerals powder(such as zirconium silicate powder,kaolin etc.).It can used in all type of grinding and polishing machine. 3. Ceramic Alumina Grinding Balls Typical Application a) high temperature and steam b) has very excellent thermal properties, with its high density high-temperature resistance 1550ºC c) it's suitable for applications in ole fin processes, such as ethylene dryers 4. Ceramic Alumina Grinding Balls Manufacturing process Alumina ball is made from high quality material with high tech cool isostatic pressing technology and under the high temperature calcined . 5. Ceramic Alumina Grinding Balls Feature Alumina balls are made from good quality and high temperature alumina powder with the characters of high degree purity, high intensity high hardness, more white and less wear abrasion and no effect for the grinded materials. Alumina ball is isostatic pressed with high density, it can increase grinding efficiency, reduce grinding time and increase effective volume of grinding mill, thereby increasing the amount of grinding material. Alumina balls have very lower wear resistance can greatly prolong the service life of grinding medium . It also have the properties of high temperature resistant, acid and alkali resistant, corrosion resistant. Researched and developed the alumina balls for dry grinding with the character of lower wear resistance and good tenacity and solved the problem of materials pollution from the grinding media. 6. Ceramic Alumina Grinding Balls Performance Index

Item/Product

75 Series

92 Series

95 Series

Al₂O₃(%)

≥75

≥92

≥95

Moh’s Hardness

7.5

9

9

Water Absorption(%)

≤0.02

≤0.02

≤0.02

BulkDensity(g/cm3)

≥3.2

≥3.6

≥3.7

Wear Resistant(‰)

≤0.15

≤0.15

≤0.1

Color

White

White

White

7. Ceramic Alumina Grinding Balls Technical Parameter

Model

XT99 Alumina Ceramic Ball

Color

White

Shape

Ball

Chemical composition

 

Min. %

Max. %

Usual %

 

Al2O3

99

99.6

99.3

 

SiO2

/

0.2

0.18

 

Fe2O3

/

0.2

0.02

 

TiO2

/

0.55

0.02

 

CaO

/

0.1

0.2

 

MgO

/

0.1

0.05

 

Na2O

/

0.25

0.1

 

K2O

/

0.2

0.13

Physical properties

Leachable Iron (%)

≤0.01

 

Apparent Porosity by Weight (%)

≤7.0

 

H2O absorption (wt.%)

<4.0

 

Acid resistance (%)

>99.8

 

Alkaline resistance (%)

≥90

 

Bulk Density

(g/cm3)

2.1

 

 

(lb/ft3)

131

 

Specific density

(kg/m3)

3400

 

 

(lb/ft3)

212

 

Moh's hardness (scale)

>8.0

 

Thermal conductivity (w/m2.k)

0.7-0.8

 

Max. Operating Temperature

(ºC)

1550

 

 

(ºF)

2822

 

Thermal expansion (%) (500ºC)

0.10

 

Thermal Shock Stability (times) (1000ºC then water cooling)

10

Geometric properties

Nominal Size

(mm)

3

6

10

13

16

19

25

38

50

 

 

(inch)

1/8

1/4

3/8

1/2

5/8

3/4

1

1.5

2

 

Crush Strength Min.

(lbs)

115

230

440

1355

1720

3344

3432

4034

4960

 

 

(kg)

52

105

200

615

780

1520

1560

1830

2250

 

 

(N/PC)

510

1030

1961

6031

7650

14896

15288

17946

22065

Size tolerance

Diameter

3

6

8

10

13

16

20

25

30

38

50

75

Size tolerance

±1.0

 

 

 

 

 

 

 

 


Item/Product 90 Series 95 Series 99 Series 995 Series

Al₂O₃(%)

≥90 ≥95 ≥99 ≥99.5

Fe₂O₃(%)

≤0.2 ≤0.15 ≤0.1 ≤0.1

Water Absorption(%)

≤5 ≤5 ≤5 ≤5

Density(g/cm3)

≥3.2 ≥3.4 ≥3.5 ≥3.6

Unit Compressive Strength

≥2000 ≥3500 ≥6000 ≥7000

Φ13mm/(N))

Impact Strength

good good good good
Color White White White White