In view of the frequent corrosion problems of the parsing towers row tubes, the internal and external morphology and composition of the row tubes in the corrosion area are analyzed and studied, and the characteristics of the parsing process and the high-temperature chlorine corrosion mechanism are combined to determine the corrosion process of the heating section of the parsing towers, and believe that condensation corrosion is the cause of corrosion in the heating section row tubes, and the accumulation of high-chlorine dust on the surface of the row tubes to form a low melting point eumelt is the key to accelerate the corrosion of the row tubes. Before the corrosion study is clear, the activated coke parsing towers of Shagang has two consecutive cases of corrosion and air leakage after less than 6 months of use, resulting in poor active coke parsing effect and affecting the gas purification effect, and finally the activated coke and sintering machine are forced to shut down for a long time. After clarifying the corrosion process, the problems existing in the actual operation are analyzed based on the corrosion mechanism, and the corrosion problem of the heating section is completely solved by installing a screening device, accurately controlling the nitrogen flow, stabilizing and increasing the negative pressure of the extraction section and exhausting ash from the head.