Arizona copper company rail cars 1914

Below is one of the early 1914, 225 cu.ft. copper slag-pot cars made by the M. H. Treadwell company.  The Arizona Copper Company used them to carry slag waste from the copper smelting process to a dump area in the desert. The dumping mechanism is under the shield at the left end of the car.

The next photo shows a train being headed by Arizona Copper's 18-ton Baldwin-Westinghouse electric locomotives hauling two Kilbourne & Jacobs 20-ton larry cars for calcines, two slag pot cars, and a 165-cu.ft. larry car for transporting clinkers.  A really neat train.

The slag pot cars were similar to those used in steel mills.