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P000035

Uploaded on:
13/02/2009 05:22:05
Type:
Digital Asset
File Size:
194.12 KB
Dimensions:
1000 x 728 pixels
3831 views 4 downloads
P number: P000035
Old photograph number: C02175
Caption: Kieselguhr works at Black Moss, 2.4 km. north of Dinnet Station. Aberdeenshire. Kieselguhr (diatomite) calcining kiln.
Description: Kieselguhr works at Black Moss, 2.4 km. north of Dinnet Station. Aberdeenshire. Kieselguhr (diatomite) calcining kiln. A close-up photograph of the kiln. Calcination was a process of heating to remove water and any other volatiles. After calcining the diatomite was greater than 87-95% silica, the residue being calcium oxide, aluminium oxide and alkalis (derived from feldspars). Almost all the diatomite went to the Ardeer explosive works in Ayrshire where it was used as a carrier or absorbent for nitroglycerine in dynamite manufacture. (Good diatomite will absorb four times its weight in water.)
Date taken: 01/01/1917
Photographer: Lunn, R.
Copyright statement: Crown
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 346500
Y latitude/northing: 801500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 194.12 KB; 1000 x 728 pixels; 85 x 62 mm (print at 300 DPI); 265 x 193 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Economic geology/ Diatomite, Geoscience subjects/ Economic geology/ Diatomaceous earth  

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