Permeability and de-aeration rate of common materials used in bulk
solids handling
Including portland cement, coal, iron powder, PVC, wheat flour
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1. Data
table
Note : orders of magnitude
only, of course variying depending on the actual specification of
materials
Material |
Compaction in % |
Permeability in m3.s/kg*10-6 |
Vibrated deaeration rate in m/s*10-3 |
Alumina – sandy |
17 |
0.42 |
19 |
Barytes |
43 |
0.48 |
3.9 |
Cement – Ordinary Portland |
40 |
0.71 |
3 |
Coal – granular |
|
|
|
As supplied |
14 |
42 |
24 |
Degraded |
36 |
1 |
2.9 |
Pulverized |
31 |
0.53 |
4.3 |
Copper concentrate |
30 |
0.33 |
9.8 |
Fly ash – fine |
49 |
0.6 |
2 |
Iron powder |
34 |
0.34 |
7 |
Magnesium sulphate |
29 |
6.3 |
17 |
Pearlite |
30 |
5.7 |
8.8 |
Polyethylene – pellets |
5 |
420 |
60 |
Potassium chloride |
16 |
11 |
26 |
Potassium sulphate |
17 |
0.99 |
18 |
PVC – powder |
22 |
1.2 |
8 |
Silica sand |
12 |
3.9 |
34 |
Sugar – granulated |
|
|
|
Fresh |
10 |
20 |
13 |
Degraded |
43 |
1.4 |
8.3 |
Wheat flour |
37 |
1.3 |
6.2 |
Zircon sand |
15 |
1.3 |
10 |
Source : Pneumatic conveying
design guide, Mills