US PATENT SUBCLASS 75 / 488
.~.~.~.~ Reduction to metallic Iron(Fe) within shaft furnace

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.~.~.~.~ Reduction to metallic Iron(Fe) within shaft furnace {2}
489  DF  .~.~.~.~.~> Externally supplied gas reductant {1}
499  DF  .~.~.~.~.~> Molten Iron(Fe) produced in shaft furnace

DEFINITION

Classification: 75/488

Reduction to metallic Iron (Fe) within shaft furnace:

(under subclass 433) Process wherein an Iron (Fe) compound is reduced in a shaft furnace.