High alumina ball

Description:

High Alumina Ball is made from high qualityα-Al₂O₃with a small amount of rare-earth oxide and processed by shaping and firing. It has high alumina content and low silica (SiO2). With characteristics of high hardness, high strength, High wearability, high density, small volume, high thermal resistance, good corrosion-resistance, non-pollution, and so on. It is widely used in ceramics, oil, fine chemical industry, construction material, metallurgy, medical field, mineral processing, electronics, and other diverse fields.

Composition	90 series	92 series	95 series	97 series	99 series	99.5 series
Al₂O₃，%	≥90	≥92	≥95	≥97	≥99.0	≥99.5
SiO₂，%	≤5.0	≤4.0	≤3.0	≤1.0	≤0.3	≤0.2
Fe₂O₃，%	≤0.8	≤0.5	≤0.1	≤0.1	≤0.2	≤0.05
CaO，%	≤1.0	≤1.0	≤1.0	≤1.0	≤0.15	≤0.1
MgO，%	≤1.0	≤1.0	≤1.0	≤0.5	≤0.2	≤0.1
Na₂O+K₂O，%	≤1.0	≤1.0	≤1.0	≤0.5	≤0.3	≤0.3

Technical Index

Index	90 series	92 series	95 series	97 series	99 series	99.5 series
	≥90	≥92	≥95	≥97	99.0
Water adsorption, %	≤3.0	≤3.0	≤3.0	≤3.0	≤3.0	≤3.0
Acid resistance, %	≥98	≥98	≥98	≥98	≥98	≥98
Alkali resistance, %	≥96	≥96	≥96	≥96	≥96	≥96
Thermal shock resistance3, / ℃	≥800	≥800	≥800	≥800	≥800	≥800
Thermal resistance / ℃	≥1450	≥1500	≥1550	≥1600	≥1650	≥1700
Crushing strength kN/pc
Φ3 mm	≥0.30	≥0.35	≥0.40	≥0.45	≥0.50	≥0.6
Φ6 mm	≥0.80	≥0.85	≥0.90	≥0.95	≥1.00	≥1.10
Φ8 mm	≥1.30	≥1.35	≥1.40	≥1.45	≥1.50	≥1.60
Φ10 mm	≥1.75	≥1.80	≥1.85	≥1.90	≥1.95	≥2.30
Φ13 mm	≥5.80	≥5.85	≥5.90	≥5.95	≥6.00	≥6.50
Φ16 mm	≥6.80	≥6.85	≥6.90	≥6.95	≥7.00	≥7.50
Φ20 mm	≥9.60	≥9.65	≥9.70	≥9.75	≥9.80	≥10.00
Φ25 mm	≥13.80	≥13.85	≥13.90	≥13.95	≥14.00	≥15.00
Φ30 mm	≥14.80	≥14.85	≥14.90	≥14.95	≥15.00	≥16.50
Φ38 mm	≥17.80	≥17.85	≥17.90	≥17.95	≥18.00	≥19.00
Φ50 mm	≥21.40	≥21.45	≥21.50	≥21.55	≥21.60	≥20.00
Φ76 mm	≥33.80	≥33.85	≥33.90	≥33.95	≥34.00	≥35.00
Bulk density Kg/m³	≥1800	≥1850	≥1900	≥2000	2100	≥2200