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基于有效容积为1 750m3的高炉炉缸在实际生产过程中受损状况,利用Fluent软件VOF方法建立高炉炉缸出铁过程的非稳态数学模型,探究铁水流动对炉缸侵蚀的影响。结果表明,死料柱沉底时底部压力较大;剪应力在出铁口的底部、炉缸炉底与死料柱边缘的交线处较大。死料柱浮起时底部所受压力比沉底小,炉底中心的压力较小,而边缘位置则出现负压,剪应力在炉底中心、出铁口的底部等位置较大。无论死料柱沉底与否,出铁口附近的炉壁剪应力在垂直方向上距离出铁口越近则越大,而且出铁口下侧的剪应力高于上侧的剪应力。
Based on the impaired condition of blast furnace hearth with effective volume of 1 750m3 in actual production process, the unsteady mathematical model of blast furnace hearth tapping process was established by Fluent software VOF method to explore the influence of molten iron flow on hearth erosion. The results show that the bottom pressure at the bottom of the dead material column is larger; the shear stress is larger at the bottom of the taphole and at the intersection of the bottom of the hearth and the edge of the dead column. When the dead column floats, the pressure on the bottom is lower than that on the bottom. The pressure in the center of the hearth is smaller while the negative pressure appears on the edge. The shear stress is greater at the center of the hearth and at the bottom of the taphole. Regardless of whether the dead column sinks to the bottom or not, the shear stress of the furnace wall near the taphole is larger in the vertical direction from the taphole, and the shear stress at the lower side of the taphole is higher than the shear stress at the upper side.