项    目

                  指                    标

     粗孔球形硅胶

            粗孔块状硅胶

4.0-8.0mm

2.0-5.6mm

5.6以上 mm

2.8-8.0 mm

1.1-4.0mm

0.25-2.0mm

粒度合格率，%≥

         90

                      90

磨耗率，%  ≦

     8

    10

           10

   30 

-----

堆积密度，g/l ≧

                   400

孔容，mL/g  ≧

        0.72

                   0.76

球形颗粒合格率，%≧

        -----

                   -----

加热减量，%≦

         5

                     5