Collection:
Juneau—Douglas City Museum
Object ID:
2007.22.078A—B
Accession#:
2007.22
Credit Line:
Transferred from the U.S. Bureau of Land Management.
Object Name:
Separator, Electromagnetic
Title:
Magnetic Separator
Year Range from:
1950
Year Range to:
1996
Description:
Magnetic Separator
A — Magnetic Tube tester assembly and table
The separator itself is the large, heavy apparatus attached to the top of the table. Two steel posts hold two electromagnets. On the rear post there is an identification plate that says "Dings Magnetic Separator Number 23248 Type DTT." The motor that operates the separator is attached to a bracket. It is on the brackets rear, proper right arm. The motor is in a small black case with a metal dial that goes from A to W. It is identified with an identification plate that says: "Lee Governed Motor No. 101296, volts 115ac, RPM 500—7500, Spec'n 250k—49.
The separator consists of two large magnets attached to a bracket. The magnets are covered with a fabric tape and painted red. The separator is attached to a table that was made separately for the piece of equipment. The table has three electrical switch boxes attached to is rear. Two of the switch boxes are painted red and the last is not painted.
B — Glass Davis tube
The Davis tube sits between the two magnets and over a metal tub. The tube is open at both ends. On its bottom end it funnels to a point with a 1/4" aperature. Approximately two inches from the bottom is a brass collar that fits under a flap on the separator. This collar has a metal post attached to its rear side. There is a glass post on the front of the tube approximately 1.5" from the curve in the tube. At the top of the tube there is a 45 degree forward bend in the glass so that the top opening will be verticle.
A — Magnetic Tube tester assembly and table
The separator itself is the large, heavy apparatus attached to the top of the table. Two steel posts hold two electromagnets. On the rear post there is an identification plate that says "Dings Magnetic Separator Number 23248 Type DTT." The motor that operates the separator is attached to a bracket. It is on the brackets rear, proper right arm. The motor is in a small black case with a metal dial that goes from A to W. It is identified with an identification plate that says: "Lee Governed Motor No. 101296, volts 115ac, RPM 500—7500, Spec'n 250k—49.
The separator consists of two large magnets attached to a bracket. The magnets are covered with a fabric tape and painted red. The separator is attached to a table that was made separately for the piece of equipment. The table has three electrical switch boxes attached to is rear. Two of the switch boxes are painted red and the last is not painted.
B — Glass Davis tube
The Davis tube sits between the two magnets and over a metal tub. The tube is open at both ends. On its bottom end it funnels to a point with a 1/4" aperature. Approximately two inches from the bottom is a brass collar that fits under a flap on the separator. This collar has a metal post attached to its rear side. There is a glass post on the front of the tube approximately 1.5" from the curve in the tube. At the top of the tube there is a 45 degree forward bend in the glass so that the top opening will be verticle.
Notes:
Magnetic tube testers were used to provide a rapid accurate determination of the magnetic content of an iron ore. A slurry of ore and water is pumped through the tube, and the magnets removed the magnetic particles from the slurry sample.
See the document file for detailed information about the separator and how it works and a photo reproduction of the object in use.
See the document file for detailed information about the separator and how it works and a photo reproduction of the object in use.
Search Terms:
Mining
JMIC
T&E
Assaying
Mine
JMIC
T&E
Assaying
Mine
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Separator
Separator