[Ball mill and drag classifier.]
Item — Box: PCA0097-1
Identifier: PCA0097-1-7
Scope and Contents
In the background is a ball mill, a rotating steel tank lined with heavy steel plates and containing steel balls which ground the crushed ore to fine sand size. In front of the ball mill is a drag classifier that separated the sand from the water and slimes by dragging the sand up a ramp. The objects with round openings in the foreground are spare bearing caps for the roll crushers.
Dates
- circa 1930
Conditions Governing Access
The collection may be viewed. However, the images may not be photocopied.
Extent
1 Photographic Prints
Language of Materials
From the Collection: English
Repository Details
Part of the Alaska State Library - Historical Collections Finding Aids Repository
Contact:
PO Box 110571
Juneau AK 99811-0571 US
907-465-2920
907-465-2925
907-465-2151 (Fax)
asl.historical@alaska.gov
PO Box 110571
Juneau AK 99811-0571 US
907-465-2920
907-465-2925
907-465-2151 (Fax)
asl.historical@alaska.gov