Reduction of Severe Erosion in the Basic Oxygen Furnace Vessel at Tata Steel, India

摘要

In recent past, one of the BOF vessel of LD1 (vessel#2) has been reported to have severe erosion (see picture of the scan image of the vessel as shown in Figure 1) during a campaign. An abnormal wear of bricks was found in bath pool region as well as above bath volume. It was observed that in certain regions, erosion was alarming and bricks were completely eroded as seen in Figure 1. This problem of premature failure of the vessel has led painstaking investigation of the cause behind this. Numerous factors such as wear pattern, brick quality, slag splashing practice, hood pressure, exhaust gas CO during blow, bath height, Argon and Nitrogen purging etc were analysed to get deep insight into the cause.