| 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} |
| 571 | DF | .~.~.~.~.~ Melting solid Iron(Fe) {4} |
| 573 | DF | .~.~.~.~.~.~ In shaft furnace (e.g., cupola, etc.) {6} |
| 578 | | .~.~.~.~.~.~.~ With Calcium carbide |