我厂二车间206~#炉(3000kVA)主要生产硅铬合金,其炉底下部底层和炉墙外层使用粘土砖,炉底上部和炉墙内衬砌筑碳砖。在生产过程中出铁口及其附近衬墙氧化侵蚀严重。特别是转炼碳铬时炉衬氧化侵蚀尤甚,出铁口附近穿炉和烧穿出铁口事故增多,平均六天就要修一次出铁口。热停炉修出铁口频繁,影响正常生产,各项技术经济 I plant two workshops 206 ~ # Furnace (3000kVA) mainly produces silicon-chromium alloy, the bottom of the bottom of the furnace and the outer wall of the furnace using clay brick, furnace top lining and furnace lining lining carbon brick. In the production process taphole and its adjacent lining oxidation and corrosion serious. In particular, when the conversion of carbon chromium furnace lining oxide erosion even more, near the taphole through the furnace and burned through the taphole increased, an average of six days to repair a taphole. Hot shut down repair iron mouth frequently affect the normal production, the technical economy