Determining protective layer thickness of blast furnaces

摘要

A method is provided for determining the thickness of a protective layer of solidified metal skull formed on the refractory hearth of a blast furnace. The refractory hearth has temperature probes embedded in the floor and walls thereof. The method includes periodically measuring temperatures indicated by the probes and determining the campaign maximum and current average temperature readings to locate two solidification isotherms representing the wear line of the refractory and the inner surface of the protective metal layer. The thickness of the protective layer is determined from the distance between the solidification isotherms representing the refractory wear line and the inner surface of the metal skull.