Physical properties before expanding:
Appearance:exfoliated,flake or superposed flake.It contains 10,000 slices in the thick of 2.54cm.
Luster:pearl luster,grease luster,no luster,surface dinginess and various luster.
Color:goden yellow,brown,brown and green,dark green,black,variedness and striation white.
Bulk density:2.2-2.8 g/cm3
Hardness:1-1.5
Bulk density:1,100-1,200 kg/m3
Melting point:1,320-1,350 C degree
Intensity of pressure:100-150 Mpa
Moisure:7% Appr.
Physical properties after expanding:
|
Grade |
size (mm) |
Bulk density (kg/m3) |
water absorption (%) |
impurity (g/m3) |
|
1 |
>4 |
145 |
475 |
<3 |
|
2 |
2.5-4 |
190 |
450 |
<3 |
|
3 |
<2.5 |
200 |
420 |
<4 |
Primary chemical compositions:
|
Compositions |
SiO2 |
Al2O3 |
MgO |
Fe2O3 |
CaO |
PH |
H2O
|
|
Contents:(%) |
37-42 |
9-17 |
11-23 |
5-18 |
0.5-0.8 |
8-11 |
<1 |
Szes of Vermiculite:
Non-expanded standard
|
types |
No.3 |
No.4 |
No.5 |
20 M |
32 M |
70 M |
|
sizes |
3.5-7mm |
1.5-3.5mm |
<1.5mm |
+900μ,<3% |
+710μ,<4% |
+250μ,<5% |
Expanded standard
|
types |
sizes |
|
5 M |
<5mm |
|
10 M |
<2mm |
|
12 M |
<1.5mm |
|
20 M |
+900μ,<5% |
|
40 M |
+450μ,<5% |
|
100 M |
+150μ,<5% |
|
200 M |
+75μ,<5% |
|
325 M |
+45μ,<5% |
|
1,250 M |
+10μ,<10% |
