spec

850-425μm

20-40

600-300μm

30-50

425-212μm

40-70

low  density

middle density

high density

low density

middle density

high density

bulk density(g/cm3)

≤1.65

≤1.80

>1.80

≤1.65

≤1.80

>1.80

appar density(g/cm3)

≤3.00

≤3.35

>3.35

≤3.00

≤3.35

>3.35

sphericity 

0.80

0.80

0.80

0.80

0.80

0.80

0.80

roundess

0.80

0.80

0.80

0.80

0.80

0.80

0.80

turbidity(FTU)

<80

<80

<80

<80

<80

<80

<90

acid  solubility(%)]

HC:HF=12:3

<8

<8

<8

<8

<8

<8

<8

rush resistance(%)

52 MPa

≤8.0

≤8.0

69 MPa

<8

≤6.0

≤6.0

≤6.0

≤5.0

86 MPa

≤8.0

≤8.0

103 MPa

≤9.0