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石横特钢3号高炉开炉仅1年后炉缸炉底电偶温度急剧升高,为了对其侵蚀进行及时准确地监测,在原有50个测温点的基础上新增了45个测点,并根据炉缸炉底侵蚀机理研究对新增测点的位置参数进行了优化设计,进一步开发了包含凝固潜热和“诊断知识库”的三维非稳态侵蚀在线监测系统,实现了对炉缸炉底侵蚀内型、温度场、渣铁壳变化的在线计算,得知炉缸侧壁相同高度的圆周方向上侵蚀不规则,不同高度越靠近炉缸炉底交界侵蚀越严重,炉缸砖衬最薄剩余厚度为734mm,其原因可能是入炉碱金属负荷过高使得炉内焦炭劣化严重、炉缸中心焦堆透液性恶化,进而导致高温铁水在拐角处形成环流;由于“隔热法”炉底的缺点,炉底陶瓷垫整体侵蚀较严重,最薄剩余厚度为138mm。
Shihengte 3 blast furnace opened a furnace just after 1 year after the furnace bottom galvanic temperature rose sharply, in order to timely and accurately monitor the erosion of its 50 points in the original temperature on the basis of the new 45 test Point, and based on the study of the furnace bottom erosion mechanism, the location parameters of the newly added measuring points were optimized and the on-line monitoring system of three-dimensional unsteady erosion including the latent heat of solidification and the “diagnostic knowledge base” was further developed. On-line calculation of the inner shape, temperature field and slag shell change of hearth bottom erosion shows that there are irregular erosion in the circumferential direction of the same height of the side wall of the hearth, and the more serious the erosion at the boundary of hearth bottom with different heights, Cylinder lining the thinnest remaining thickness of 734mm, the reason may be caused by the furnace into the alkali metal overload is too high to make the furnace deterioration of coke severe hearth heap liquid permeability deteriorated, leading to the formation of high temperature hot metal around the corner; due to “Insulation ” the shortcomings of the hearth, the overall erosion of the furnace bottom ceramic tiles more serious, the thinnest remaining thickness of 138mm.