Means For Treating Ores Or For Extracting Metals Patents (Class 266/168)
- Fluidized zone (Class 266/172)
- Rotary drum-type furnace (Class 266/173)
- With safety device (Class 266/174)
- With separate preheat chamber (Class 266/175)
- With means for moving solid material to or through heating zone (Class 266/176)
- With work supporting grate (Class 266/185)
- With means for feeding fluids (Class 266/186)
- With cooling of heating means (Class 266/190)
- With discharge means (Class 266/195)
- Shaft-type furnace, e.g., blast furnace (Class 266/197)