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1·The wear reason of slit purging plug used in the large refining ladle has been analyzed in detail in the paper, that is the thermal stress and strong erosion and abrasion.

对狭缝式透气砖在大型精炼钢包中的损毁原因进行了分析，热应力和强大的冲刷磨损作用是两个主要因素。