US PATENT SUBCLASS 75 / 492
.~.~.~.~.~.~.~.~ With gasification of solid carbonaceous material in melt (e.g., coal, 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}
491  DF  .~.~.~.~.~.~.~ With melting Iron(Fe) product outside shaft furnace {1}
492.~.~.~.~.~.~.~.~ With gasification of solid carbonaceous material in melt (e.g., coal, etc.)

DEFINITION

Classification: 75/492

With gasification of solid carbonaceous material in melt (e.g., coal, etc.):

(under subclass 491) Process wherein coal is added to the molten Iron (Fe) and a gas (usually Oxygen or air) is passed through the melt to convert the coal in the melt to a reducing gas which is then employed in the shaft furnace reduction.