Refractory ceramic ball as catalyst support and covering packings used in the shift converter and reformer in ammonia plant Refractory ball is also called inert ceramic ball, refractory ceramic ball, thermal-storage ball etc. which is widely used in the packed towers in the field of petrochemistry, fertilizer, fine chemistry and environment protection chemical composition: 

typeproperties		Low aluminaball	Middle aluminaball	High aluminaball	CorundumAlumina ball
(%)		20~25	47~56	90~92	98.5
Al2O3+SiO2 (%)Min		92			98.5
(%)Min		1			0.2
CaO (%) Max		1.5	2	3	0.2
MgO (%) Max		2.5	0.5	0.5	0.1
K2 + Na2O		4	3.5	4	0.5
TiO2 (%)Max		0.5	0.1	0.1	0.5
Water absorption(%)Max		3			01
Anti-acid (%)Min		98
Anti-alkali (%)Min		80	85	90	95
Density (g/cm3)		2.3~2.4	2.6	3.5	3.0~3.6
Spalling Resistance		250	500	700	800
Operation Temperature (oC) Max		1100	1480	1760	1800
Mohs Hardness Max		6.5	7	7	7.5
CrushingStrength(N/piece)	6mm	0.54	0.56	0.64	1
	13mm	1.56	1.67	1.99	3
	19mm	2.89	4.21	3.21	5
	25mm	4.89	6.22	5.28	8
	38mm	5.33	8.92	5.33	8
	50mm	6.22	9.8	8	15

refractory ceramic ball