Perforated Ball

Perforated ball is further developed based on inert alumina ball, which is perforated through the ball body along its axes. Therefore, besides characters of high mechanical strength, high chemical stability and heat endurance, both the specific surface area and voidage for perforated ball are increased a lot. It can improve distribution of materials and their flux. Comparing with inert alumina ball at the same operation conditions, the voidage is increased by 12%, contacting specific surface area is increased by 25%, and resistance to fluid of material is decreased by 15%. As a result, distribution of vapor-liquid is distributed more evenly, and flow of material is increased significantly. It also absorb and withhold impurities in the form of granular, colloid and heavy metals so that it can avoid impurities depositing on the catalyst and prevent catalyst from caking or poisoning. Therefore, perforated ball is widely applied to replace inert alumina ball in petrochemical, chemical, fertilizer, gas and environmental protection industries.  In accordance with customer specific needs, it can also carry active agents, e.g. molybdenum, nickel, cobalt, to prevent catalyst from poisoning. If any enquiry on this product, please feel free to contact us via sales@rubbersealing.com

Chemical Composition
Item	Index
Al2O3	(Normal Value +4）%
Al2O3+SiO2	92% Min.
Fe2O3	1% Max.

Product Specification

Item	Main Crystal Phase	Feldspar	Feldspar Mullite	Mullite	Mullite Corundum	Corundum
	Al2O3 ,%	20-30	30-45	45-70	70-90	≥90
Water absorption, %		≤5
Acid resistance, %		≥98
Alkali resistance, %		≥80	≥82	≥85	≥90	≥95
Thermal resistance, °C		≥300	≥400	≥500	≥700	≥800
Compressive Strength,  N/piece	φ6	≥0.40	≥0.42	≥0.44	≥0.48	≥0.50
	φ8	≥0.48	≥0.52	≥0.60	≥0.62	≥0.65
	φ10	≥0.60	≥0.70	≥0.80	≥0.90	≥1.00
	φ13	≥1.00	≥1.10	≥1.30	≥1.50	≥2.00
	φ16	≥1.50	≥1.60	≥1.80	≥2.30	≥2.60
	φ20	≥1.80	≥2.00	≥2.30	≥2.80	≥3.20
	φ25	≥2.50	≥2.80	≥3.20	≥3.60	≥4.00
	φ30	≥3.00	≥3.20	≥3.50	≥4.00	≥4.50
	φ38	≥4.00	≥4.50	≥5.00	≥5.50	≥6.00
	φ50	≥6.00	≥6.50	≥7.00	≥8.50	≥10.0
	φ60	≥8.00	≥8.50	≥9.00	≥10.0	≥12.0
	φ70	≥10.0	≥11.0	≥12.0	≥14.0	≥15.0
Bulk Density*	Kg/m3	1100-1200	1200-1300	1300-1400	1400-1500	>1550
* Note: The data of bulk density is only given for reference, not as the acceptance criteria.
Product Size

Diameter, φ	3	6	8	10	13	16	20	25	30	38	50	75
Tolerance, mm	±1.0				±1.5				±2.0			±3.0