Alumina Ball
Alumina Balls
Application: With advanced cutting edge technology ,high quality alumina powder as raw materials & sophisticated recipe, our products are best solution as grinding media applied in various field such as ceramic industry, cement industry, paint industry, pigment industry, chemical industry, pharmaceutical industry, coating and mining industry.
Characteristics: high harness, high density, low wear loss, good erosion resistance, regular shape, etc.
Technical Index
Qualification | JD-68% | JD-75% | JD-80% | JD-85% | JD-92% |
Alumina content | ≥68 | ≥75 | ≥80 | ≥85 | ≥92 |
Moisture absorption | ≤0.02% | ≤0.02% | ≤0.02% | ≤0.01% | ≤0.01% |
Density | 2.95~3.02 | 2.95~3.02 | 3.30~3.35 | 3.40~3.45 | 3.60~3.63 |
Hardness | 7.5 | 8 | 9 | 9 | 9 |
Compressive strength | ≥1700 | ≥1700 | ≥1800 | ≥1850 | ≥2000 |
Equivalent wear loss | ≤0.18‰ | ≤0.12‰ | ≤0.10‰ | ≤0.10‰ | ≤0.08‰ |
Color | light yellow | grey | white | white | white |
Dimension
Size | JD-68% | JD-75% | JD-80% | JD-85% | JD-92% | |
30~40 | tolerance | ±1.8mm | ±1.8mm | ±1.8mm | ±1.8mm | ±1.8mm |
50~60 | ±2.0mm | ±2.0mm | ±2.0mm | ±2.0mm | ±2.0mm | |
70~80 | ±3.0mm | ±3.0mm | ±3.0mm | ±3.0mm | ±3.0mm |
Filling guidance for Using
During wet grinding process, when charge balls up to 50%-55% net volume of ball mill, the best status can be realized, and the weight of balls within the ball mill can be estimated with formula.
G=3.14*(R-H)2*(L-2H)*P*(50%~55%)*(1-25%~30%)
G:charge of alumina ball P:Density of ball
H:Thickness of lining brick L:Length of ball mill
R:Inside radium of ball mill
Attention:(1) 50%-55%:Best status of grinding, the net volume of balls inside ball mill.
(2)25%-30%:Inside space of ball mill.
(3)below calculation for ball mill capacity should be larger than 3 tons only.
Alumina Ball Ratio
According to the different size of alumina balls, the charging should be depending on ball mill capacity and grinding materials. Therefore, bigger size ball should be properly increased for larger grains and high strength raw materials and small size balls should be reduced accordingly.
Alumina ball recharged(A)=first charge(B)*balls wears and tears(C) * grinding time(D)
