US PATENT SUBCLASS 75 / 662
.~.~.~.~.~.~.~ Treating material in rotary kiln

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
585  DF  .~.~.~ Nonferrous {25}
654  DF  .~.~.~.~ Zinc(Zn) {3}
656  DF  .~.~.~.~.~ Reduction {2}
658  DF  .~.~.~.~.~.~ Vaporizing or condensing {4}
662.~.~.~.~.~.~.~ Treating material in rotary kiln

DEFINITION

Classification: 75/662

Treating material in rotary kiln:

(under subclass 658) Process in which a Zinc (Zn) compound is reduced in an approximately cylindrical vessel rotating on its cylindrical axis. The axis is horizontal or inclined less than 45 degrees from horizontal. The vessel rotates in only one direction through an angle of over 360 degrees during the reduction and rotates substantially continuously.