Specifications

High alumina balls for ceramic grinding media
1.Al2O3>92%,95%
2.Hardness>9
3.Volume density:3.64g/cm3-3.67g/cm3

High alumina balls for ceramic grinding media

Features: 
1) Spheres (balls) or cylinders
2) Very excellent support and covering media
3) Function as support media for catalyst beds or other chemical beds in reactors or towers
4) Very excellent performances and stability in acid and other chemical surroundings
5) Very good chemical stability and low rate of water absorption
6) Can withstand high pressure and high temperatures
7) Can be even used in hot caustic service because they can resist over 10% sodium hydroxide service up to 60ºC, and 1% sodium hydroxide service temperature up to 100ºC
8) Can also resist the chemical corrosions of any acid (including organic and inorganic acids, but except HF acid), most of alkali and organic solvent
9) Will increase the distributors of liquid and gas, supporting and protecting the catalyst and avoid poisoned

 

Application: oil refinery, chemical, fertilizer, natural gas and environmental protection industries etc.

 

Technical Specification:     

Type Item		Feldspar	Feldspar-Mullite	Mullite	Mullite-Corundum	Corundum
Chemical composition%	Al2O3	20-30	30-45	45-70	70-90	≥90
	Al2O3+SiO2	≥90
	Fe2O3	≤1
Water absorption, %		≤5
Acid resistance , %		≥98
Alkali resistance,%		≥80	≥82	≥85	≥90	≥95
Thermal resistance,ºC		≥1300	≥1400	≥1500	≥1600	≥1700
Crushing strength N/particle	ø3	≥120	≥140	≥150	≥160	≥200
	ø6	≥400	≥420	≥440	≥480	≥500
	ø8	≥480	≥520	≥600	≥620	≥650
	ø10	≥600	≥700	≥800	≥900	≥1000
	ø13	≥1000	≥1100	≥1300	≥1500	≥1800
	ø16	≥1500	≥1600	≥1800	≥2300	≥2600
	ø20	≥1800	≥2000	≥2300	≥2800	≥3200
	ø25	≥2500	≥2800	≥3200	≥3600	≥4000
	ø30	≥3000	≥3200	≥3500	≥4000	≥4500
	ø38	≥4000	≥4500	≥5000	≥5500	≥6000
	ø50	≥6000	≥6500	≥7000	≥8500	≥10000
	ø75	≥10000	≥11000	≥12000	≥14000	≥15000
Bulk density, kg/m3		1300-1400	1400-1500	1500-1600	1600-1800	≥1800
Note: The data of bulk density is given for reference only, not as the acceptance criterion.