Washington University home page back to Department home page

Rock Crushing Facilities

The rock-crushing and mineral separation facilities utilize Sturtevant jaw crusher, Bico rotary disc-mill. Air quality and sample integrity in the crushing-room is controlled by use of thermally sealed vinyl collection bags that reduce production of air-borne particles and eliminate the risk of cross-sample contamination.

Jaw Crusher

A Jaw Crusher reduces large size rocks or ore by placing the rock into compression. A fixed jaw, mounted in a "V" alignment is the stationary breaking surface, while the movable jaw exerts force on the rock by forcing it against the stationary plate. The space at the bottom of the "V" aligned jaw plates is the crusher product size gap, or the size of the crushed product from the jaw crusher. The rock remains in the jaws until it is small enough to pass through the gap at the bottom of the jaws.

Disc Mill

It is device that rotates a circular Tungstencarbite disc that has a number of cutting edges symmetrically arranged about its axis An end mill is a cutter shaped like a pencil with a tapered shank that fits into the machine spindle