How do you calculate refractory wear index in electric arc furnace?

The refractory wear index in an electric arc furnace (EAF) is calculated by measuring the thickness loss of the refractory lining over a specific time period. This involves taking initial and final measurements of the refractory lining's thickness and calculating the difference. The wear index can also be expressed as a ratio of the volume of refractory material lost to the total volume of the refractory lining, often normalized by the duration of the operation. This index helps in assessing the performance and longevity of the refractory materials used in the EAF.