US PATENT SUBCLASS 75 / 531
.~.~.~.~.~.~ And adding solid agent, slag, or flux to premelted Iron(Fe) or slag layer thereon

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}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
528  DF  .~.~.~.~.~ Injecting gas or nonmetalliferous liquid which gasifies into, onto, or through premelted Iron(Fe) or slag layer thereon {5}
531.~.~.~.~.~.~ And adding solid agent, slag, or flux to premelted Iron(Fe) or slag layer thereon {5}
532  DF  .~.~.~.~.~.~.~> Loose elemental Carbon(C), coal, or coke (e.g., carburizing, etc.)
533  DF  .~.~.~.~.~.~.~> With solid entrained in gas or injected by gas pressure {6}
540  DF  .~.~.~.~.~.~.~> Gas contains gaseous Oxygen {5}
546  DF  .~.~.~.~.~.~.~> Noble gas or inert gas not otherwise identified
547  DF  .~.~.~.~.~.~.~> Gas compound containing Oxygen (e.g., Carbon monoxide, Carbon dioxide, Water, etc.)

DEFINITION

Classification: 75/531

And adding solid agent, slag, or flux to premelted Iron (Fe) or slag layer thereon:

(under subclass 528) Process wherein premelted metal that contains over 50 percent by weight Iron (Fe) or slag layer thereon is contacted with a solid treating agent, a separately prepared slag, or flux.

(1) Note. Classification is based on the agent, slag, or flux added to the molten metal or slag layer thereon and not on the composition of the in situ generated slag or solid agents initially present before melting or added during melting.

(2) Note. The addition of molten metal to a solid agent, slag, or flux is acceptable in this subclass.