GRINDING MEDIA

SEPOR, INC
718 N FRIES AVE.
WILMINGTON, CA 90744
310 830 6601
Fax: 310 830 9336
info@sepor.com

Rod Charges

Rod mill charges come in Stainless steel and mild steel only.

Grinding Media

Generally, steel grinding balls are used with steel mills, ceramic balls are used with porcelain or ceramic lined mills and steel, ceramic, or other high density media is used with elastomer lined mills. Porcelain balls have a SG of 2.3 and have a average weight/volume of 12.8 pounds per gallon. High density alumina (ceramic) balls have a SG of 3.2 and have an average weight/volume of 17.5 pounds per gallon. Steel balls have a SG of 7.7 and have an average weight/volume of 40 pounds/gallon. Higher density grinding media generally results in faster grinding in a ball mill. An optimum grinding charge for a ball mill may be experimentally determined, however generally the range is from 20% to 50% of the mill volume, or to the center line. Approximately 30-40% of the ball charge will be void space

Ceramic Grinding Balls

These hard impervious spheres which are heavier than porcelain, mill faster with negligible silica contamination. They are wear and chip resistant and unaffected by most acids and alkali’s. Specific gravity is 3.4, charging factor 8.5 lbs. per gallon.

Catalog #Ball Diameter (in.)No. per pound
010E-0790.588
010E-0800.7545
010E-0811.015
010E-0821.2510
010E-0831.55
010E-0842.02

Carbon Steel Grinding Balls

The carbon steel hardened grinding balls are triple forged.

Catalog #Ball Diameter (in.)No. per pound
010E-0940.553
010E-0930.7517
010E-0870.8759.5
010E-08817
010E-0891.253.5
010E-0901.52
010E-09220.8

Chrome steel (52100) Grinding Balls

Catalog #Ball Diameter (in.)No. per pound
010E-0910.1875430+
010E-2600.553
010E-2610.62526
010E-19417
010E-1011.18753
010E-1991.43752
010E-26420.08

Stainless Steel Grinding Balls

Catalog #Ball Diameter (in.)No. per pound
010E-1980.25430+
010E-1970.553
010E-1950.7517
010E-26617
010E-2671.52
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