Process for reducing dust emission and free air access in...

Details Process for reducing dust emission and free air access in... Process for reducing dust emission and free air access in...

B - Operations, Transporting

22

D

22/187, 53/84

B22D 1/00 (2006.01) B22D 11/10 (2006.01) C21B 7/14 (2006.01) C21C 7/00 (2006.01)

Patent

CA 2010040

- 1 - ABSTRACT A process for reducing dust emission and free air access in the region of the tapping runner of a blast furnace, in the downstream rocking runner and, if appropriate, in the region of a torpedo ladle or a casting bed. The process involves applying CO2 snow and/or CO2 gas on top of the molten crude iron and/or ferromanganese in the region of the runners and/or to the casting jet and/or for introducing CO2 into the said runners or vessels before contact with the molten raw material. The particular advantages of the process are: reduction in dust emission, lowering of nitriding, reduction in the energy costs for dedusting and reduction in wear of the refractories.

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