日本高炉出铁口以往大多采用粘土砖或硅线石砖,开炉数年后,出铁口被严重侵烛(如名古屋1号高炉开炉2年后,出铁口砖仅剩200～300mm),侵蚀部位被炮泥及炉内物质所置换。为确保出铁口深度,防止漏煤气,并延长出铁口砖的使用寿命,开发了一种新型出铁口砖——Al_2O_3—C—SiC砖(其性能见附表)。新日铁釜石1号高炉出铁口已采了这种砖(其出铁口构造见附图),开炉 In the past, most of the blast furnace tapholes in Japan used clay brick or sillimanite brick. When the furnace was opened for several years, the taphole was severely invaded (for example, after the blast of the Nagoya No.1 blast furnace was started for 2 years, the remaining 200-300 mm ), The erosion site is replaced by gunite and furnace material. In order to ensure the depth of the taphole, prevent the leakage of gas and extend the service life of the taphole, a new type of taphole brick, Al_2O_3-C-SiC brick, has been developed. Nippon Steel Kamaishi 1 blast furnace taphole has been taken such a brick (the taphole structure see attached map), open