Gallery

Slag Pushed by Air Infiltration

 

Infiltrated air expands instantly approximately 650% as its temperature rises from room temperature to the furnace temperature. Expanded air flows thru electrode orifices and pushes hot slag into 4th hole openings as shown above. Depending on the pushed volume and its temperature, slag can travel all the way the drop box (or combustion chamber).

Main Sources of Air Infiltration

 

The main source of air infiltration is by far the slag door which doesn’t exist in many EAFs and most of the existing ones are not designed to be airtight.

The second source of air infiltration is represented by the space existing in between roof panels, shown below. Sage panels are airtight as shown of the large picture at right.

Cracks Around EAF Panel Curves