| 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} |
| 548 | DF | .~.~.~.~.~.~ Gas contains gaseous Oxygen {4} |
| 556 | | .~.~.~.~.~.~.~ Injecting only from below melt surface {1} |
| 557 | DF | .~.~.~.~.~.~.~>.~ Including other gas from below |