Blast furnace rock drill installation and sealing video

How does a blast furnace tap hole work?

For the maintenance of a stable state at the tap hole thus facilitating the liquid removal from the hearth, an excess of high quality blast furnace tap hole mass is, in practice, injected in the tap hole when a tap is terminated.

How long does it take to tap a blast furnace?

Medium or small sized blast furnaces have normally one tap hole and the time interval between two tappings generally varies from 30 min to 90 min.

Should drilling and blasting be performed under the same supervisor?

Operations where drilling and blasting are performed under the same supervisor or by the same crews are highly recommended, in that this allows both crews to work closely to maintain efficient borehole drilling and loading. Drilling information can be conveyed from the drilling crew to the blasting crew by means of stakes placed at each blasthole.

How is slag removed from a blast furnace?

However presently because of better prepared burdens, the slag volumes are at around 250–320 kg/ton level. Therefore the monkey is seldom used and the slag is typically removed only through the tap hole during the blast furnace tapping.

Is a blast furnace a continuous process?

The operation of a blast furnace is a continuous process. The blast furnace continues to produce liquid iron (hot metal) and slag as long as it is in operation.

How do you control fugitive dust in a drill rig?

Dust-suppression and crushed-rock-cutting collection systems are available on many drill-rig models to help control fugitive dust. Rubber skirts and water-misting controls contain rock fines and dust around the blasthole collar. Cyclone mechanical dust collectors remove drill cutting from the hole collar and place them alongside the drill rig.