新钢8号高炉炉缸组合修复技术的应用

Application of Combined Repair Technology on Xinyu Steel No.8 BF Hearth

新钢8号高炉西铁口下方热流强度达到警戒值,经测算炭砖残厚仅剩200mm,安全生产受到严重威胁。采用“炭砖+高铝砖+炉缸局部浇注”组合修复技术,对炉缸进行快速修复,解决了铁口散喷及中套上翘等一系列技术难题。与炉缸整体浇注技术相比,组合修复技术在防铁口散喷、防中套上翘等方面效果非常明显;同时,该技术兼顾了高炉寿命、工期、费用等因素,为今后高炉炉缸快速修复拓宽了思路。

The specific heat flow rate of Xinyu Steel No.8 BF at the hearth section under the taphole reached its warning limit.It is estimated,according to the hearth refractory corrosion calculation,the residual thickness of carbon bricks was only 200 mm,implying that the furnace suffered severe safety problem.Thanks to the adoption of the combined repairing technology of"carbon bricks+high alumina bricks+local refractory casting",the hearth got repaired quickly,and overcame a series of technical problems,such as HM blowout at taphole and upwarp of tuyere cooler.Compared with the technology of integral refractory casting,the combined repairing technology not only excels in preventing HM blowout at taphole and upwarp of tuyere cooler,but also in maintaining long campaign of furnace,repairing schedule and target cost.It enlightens us in seeking more solutions for fast repairing of the hearth.