Furnace tapping is the process of removing slag and hot metal from a furnace hearth.
The tapping process is the most important factor that determines the in-furnace gas pressure and residual amounts of iron and slag in the hearth.
Inefficiency in hearth drainage results in unstable furnace operation which leads to marked losses in furnace productivity and furnace longevity.
When hot metals and slag levels approach the tuyere level, the reducing gas flow in the bosh is severely affected.
This results in irregularities in the burden and descent of the furnace.

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