... black-grey cylinder Diameter mm 9.0-9.5 4.0-6.0 Length mm 5.0-9.0 3.0-5.0 Bulk density 1.35- ... 1.45Kg/L Specific surface 80m2/g Fe2O3 :≥ 74% Cr2O3 ≥7.0 ... . Pellets' percentage of strength below 160N/cm,% 10.0 max. Friction loss,% 8.0max. Burned loss(be ... ),% 10.0max. Sulfur in catalyst body(as S),% 0.025max. Packing: in 1000kg standard plastic woven bags, ...