US PATENT SUBCLASS 266 / 144
WITH MEANS TREATING OR HANDLING GASES EXHAUSTED BY TREATING MEANS

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

144WITH MEANS TREATING OR HANDLING GASES EXHAUSTED BY TREATING MEANS {8}
145  DF  .~> Having means to treat or handle gases evolving from rotary furnace
146  DF  .~> By contacting gas with nonmetallic liquid {1}
148  DF  .~> By condensing and collecting a volatile constituent {6}
155  DF  .~> With heat exchanger, e.g., waste heat boiler
156  DF  .~> By means recycling exhaust gas
157  DF  .~> By separating particles from evolved gas
158  DF  .~> Hood
159  DF  .~> Offtake

DEFINITION

Classification: 266/144

(under the class definition) Device wherein the metallurgical apparatus is provided with means for a) removing fumes and the like from the apparatus b) conditioning such fumes to either remove valuable components, e.g., gaseous mercury or render the fumes less objectionable to the environment, e.g., pollution abatement devices, or c) to extract heat energy from the fumes.

(1) Note. While apparatus to condense metallic vapors within a vacuum will be found herein, apparatus to remove entrained gases from a mass of molten metal by subjecting at least a portion of the mass to a vacuum is not considered to be a fume handling or treating means since such gases do not normally "evolve" by themselves from the molten mass. Such apparatus thus will not be found in this or the indented subclasses.

(2) Note. A nominally recited flue or a nominal flue and damper combination is not considered to be a fume-handling means and thus will not be found herein. Further, a mere windbox or a nominal windbox and blower combination used in conjunction with an ore- sintering apparatus is not

considered to be a fume-handling means for this subclass. Such patents have been placed on the features of the particular treating apparatus with which they are associated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

207+, for vacuum-degassing apparatus for molten metals.

SEE OR SEARCH CLASS 432, Heating,

66, 67+, and 72, for a heating means of general utility having means for treating or handling the exhaust gas.