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Alumina Ceramic Balls

Micro-crystalline Wear-resistance Alumina Ceramic Balls

  • Author:Becky
  • Source:Original
  • Release on :2018-5-24

Product Description

The micro crystalline wear-resistant alumina ball is a high-quality grinding medium made of selected high grade material, advanced molding technology and calcined in high temperature tunnel kiln. Possessed with high density, high hardness, low wear, good seismic stability and good corrosion resistance, the products are the most ideal medium for grinding glaze, blank and mineral powder processing.

Alumina ball are used as the grinding medium of ball mill in ceramics, cement, paint, refractory, inorganic mineral powder and other industries.

Property Specification
Type
WD-Alumina Ball 1
WD-Alumina Ball 2
WD-Alumina Ball 3
Usage
Wet Grinding
Wet & Dry GRINDING
Wet Grinding
Application
Beads / Balls
Only Balls
Only Balls
Color
White
White
White
Standard Size (mmΦ)
3-90
20-60
30-70
Al2O3
92%
92%
>85%
SiO2
5%
5%
<15%
Specific Gravity
>3.63 g/cm3
>3.65 g/cm3
3.3~3.6 g/cm3
Porosity
0.0
0.0
Water Absorbation
<0.01
<0.01
<0.01
Moh’s Hardness
9
9
8~9
Flexural Strength
370 MPa
350 MPa
Compressive Strength
2000 Kgf/Pcs
2000 Kgf/Pcs
Wet method (%)
<0.01
<0.05
<0.01

Alumina ball recharge quantity
Recharge quantity=Primary ball quantity”ball wear loss*rinded time
In the situation of dry grinding
Dry grinding is widely used in mining, ceramics industries, we developed alumina balls performed well on dry grinding situation with much lower wear-loss, it helps solve the problem of materials contamination.
The proportion of the alumina ball for dry grinding depends on the hardness anc fineness of the grinding raw material,generally speaking,CIP formed grinding ball used fordrygrinding.

Wear-loss testing method of alumina ball
This method is the Chinese domestic testing method, put alumina ball samples into polyurethane jar,testing the wear losson the unit time.
1. Put 4kg alumina ball and 4L water into the grinding jar, put the jar into the testing machine, grinding 2h on the revolution of 80r/min.Take out the samples dry them and get weight M1.
2. Put the above samples again into the jar, add 4L water, grinding 24h on the same revolution of 80r/min.
3. Take out the samples dry and get weight M2.
4. Testing the average diameter of the samples, get average diameter D5.
Wearloss calculation: EWT(%o )=KD M 1-M2 )M 1
Empirical formula: EWT(%o)= (M1-M2)M1/24 /100*1000*D

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