US PATENT SUBCLASS 75 / 459
.~.~.~.~.~ Using additive to the blast

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}
458  DF  .~.~.~.~ Blast furnace reduction to produce molten Iron(Fe) {7}
459.~.~.~.~.~ Using additive to the blast {3}
460  DF  .~.~.~.~.~.~> Carbonaceous {3}
465  DF  .~.~.~.~.~.~> Water
466  DF  .~.~.~.~.~.~> Oxygen enrichment

DEFINITION

Classification: 75/459

Using additive to the blast:

(under subclass 458) Process wherein an additional substance other than ambient air is intentionally added to the blast forced under pressure through the tuyeres.