SLATE POWDERS - Fineness Grading Delabole Slate powders are produced in a wide range of sieve and sub-sieve fineness grades. The standard gradings and their typical particle size analyses are listed in Table 2. Fig. 3 illustrates the typical particle size analyses graphically. Photomicrographs of the coarsest and finest gradings are shown on the technical page in Figures 1 and 2 respectively, and to give an idea of scale the insets show a human hair to the same scale. These illustrations clearly show the wide fineness range of standard gradings which are maintained within narrow commercial limits.
PRODUCT RANGE
99-350, 99-300, 99-240, 99-200, 90-200, 85-200, 80-200, 75-200, 70-200.
APPLICATIONS (Powder)
Delabole Slate powder is used as a mineral filler, carrier, or surface dusting agent in the following products:
Bituminous Mixes
- Asphaltic Floorings
- Roofing Felts
- Airfield Carpets
- Bituminous Paints
- Expansion Jointings
- Damp-proof Courses
- Pipe Protective Coatings
- Mastics
Fertilizers
Filling Compounds
Insecticides
Paints & Printing Inks
Pigmented Powders
Plastics
- Shellac based
- Epoxy Resin based, and others
Sealing Compounds
Adhesives
Rubber
A Powder & Granules brochure is
available which includes more detailed
information. Please select "BROCHURES"
from the menu at the top or
click here.
FOR FURTHER INFORMATION, A PERSONAL
QUOTATION OR TO PLACE AN ORDER, PLEASE
CONTACT OUR SALES TEAM VIA EMAIL (sales@delaboleslate.co.uk),
PHONE (01840 212242) or FAX (01840
212948)
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Table 2: Particle size analysis of
standard grades of Delabole Slate powder
Sieve Opening / Microns
|
B.S. 410 Sieve
|
PERCENT PASSING
|
‘F’ 20 Micron
|
99% - 350 B.S.S.
|
99% - 300 B.S.S.
|
99% - 240 B.S.S.
|
99% - 200 B.S.S.
|
95% - 200 B.S.S.
|
90% - 200 B.S.S.
|
85% - 200 B.S.S.
|
80% - 200 B.S.S.
|
75% - 200 B.S.S.
|
70% - 200 B.S.S.
|
422
|
36
|
|
|
|
|
|
|
|
|
|
|
99.6
|
353
|
44
|
|
|
|
|
|
|
|
|
|
|
99.0
|
295
|
52
|
|
|
|
|
|
|
|
|
|
|
98.0
|
251
|
60
|
|
|
|
|
|
|
|
|
99.9
|
99.9
|
97.0
|
211
|
72
|
|
|
|
|
|
|
99.9
|
99.7
|
99.5
|
98.5
|
94.0
|
178
|
85
|
|
|
|
|
|
|
99.7
|
99.0
|
98.0
|
95.0
|
90.0
|
152
|
100
|
|
|
|
|
|
99.9
|
99.5
|
98.5
|
95.0
|
92.0
|
87.0
|
124
|
120
|
|
|
|
|
99.9
|
99.5
|
99.0
|
96.0
|
91.0
|
87.0
|
81.0
|
104
|
150
|
|
|
|
99.9
|
99.5
|
98.5
|
97.0
|
92.0
|
88.0
|
83.0
|
78.0
|
89
|
170
|
|
|
|
99.7
|
99.3
|
97.0
|
94.0
|
89.0
|
84.0
|
79.0
|
74.0
|
76
|
200
|
|
|
99.9
|
99.5
|
99.0
|
95.0
|
90.0
|
85.0
|
80.0
|
75.0
|
70.0
|
64
|
240
|
|
99.9
|
99.7
|
99.0
|
97.0
|
92.0
|
86.0
|
81.0
|
76.5
|
72.0
|
67.0
|
53
|
300
|
99.9
|
99.5
|
99.0
|
97.0
|
94.0
|
88.0
|
82.0
|
77.0
|
72.0
|
67.0
|
62.0
|
44
|
350
|
99.0
|
99.0
|
98.0
|
95.0
|
90.0
|
83.0
|
77.0
|
72.3
|
68.0
|
63.0
|
58.0
|
20
|
|
97.0
|
85.0
|
80.0
|
73.0
|
67.0
|
62.0
|
58.0
|
54.0
|
51.0
|
47.0
|
42.0
|
10
|
|
88.0
|
57.0
|
53.0
|
49.0
|
46.0
|
43.0
|
40.0
|
38.0
|
35.0
|
32.0
|
28.0
|
5
|
|
68.0
|
26.0
|
26.0
|
24.0
|
23.0
|
21.5
|
20.0
|
19.0
|
18.0
|
17.0
|
15.0
|
2
|
|
36.0
|
6.0
|
5.5
|
5.2
|
4.7
|
4.3
|
4.2
|
4.0
|
3.7
|
3.6
|
3.0
|
Fig 3: Particle size analysis of
standard grades of Delabole Slate powder
Note: Table below shows typical grading
only; there may be some variations
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