US PATENT SUBCLASS 75 / 493
.~.~.~.~.~.~.~ Using solid Carbon(C) to generate gas in separate furnace (e.g., Wiberg process, etc.)

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}
433  DF  .~.~.~ Iron(Fe) {18}
488  DF  .~.~.~.~ Reduction to metallic Iron(Fe) within shaft furnace {2}
489  DF  .~.~.~.~.~ Externally supplied gas reductant {1}
490  DF  .~.~.~.~.~.~ Solid Iron(Fe) produced within shaft furnace {4}
493.~.~.~.~.~.~.~ Using solid Carbon(C) to generate gas in separate furnace (e.g., Wiberg process, etc.) {1}
494  DF  .~.~.~.~.~.~.~>.~ Solid Carbon(C) is coal

DEFINITION

Classification: 75/493

Using solid Carbon (C) to generate gas in separate furnace (e.g., Wiberg process, etc.):

(under subclass 490) Process wherein the gaseous reductant is manufactured from solid Carbon (C) in a furnace separate from the shaft furnace in which reduction to metallic Iron (Fe)

takes place.