Dorr classifier

Dorr classifier

[′dȯr ′klas·ə‚fī·ər]
(mechanical engineering)
A horizontal flow classifier consisting of a rectangular tank with a sloping bottom, a rake mechanism for moving sands uphill along the bottom, an inlet for feed, and outlets for sand and slime.
References in periodicals archive ?
There, Dorr invented the Dorr classifier, an apparatus for separating fine and coarse material in an ore slurry on a continuous basis, rather than through the standard, single-batch processing technique.
Although the Dorr classifier was initially used for continuous extraction of gold by the cyanide process, its application also permitted the profitable recovery of silver and other materials from sources previously considered worthless.
patents awarded Dorr, the most important include, the Dorr classifier, the Dorr thickener, a tray thickener, a thickener-hydrometer, and the renowned Dorr agitator.