高炉炉缸瞬态流场的数值模拟

Numerical Simulation of Transient Flow Field in a Blast Furnace Hearth

高炉炉缸内由于"死焦堆"的存在,出现铁水环流而冲刷炉壁,为研究铁水环流对炉缸的侵蚀机理,以某钢厂1 000m^3高炉为模型,建立了高炉炉缸沉坐死料柱模型,利用数值模拟方法,通过分析渣铁水瞬态流场和炉底剪切力,研究了高炉炉缸"蒜头状"内型的形成机理。研究表明:在排放过程中,铁口正下方的炉壁与炉底交界处出现较大范围的高速区,方向整体趋向铁口侧,且炉底高应力区集中在出铁口下方附近,最易出现"蒜头状"侵蚀。

Because of the existence of deadman in a blast furnace hearth,circulation of hot metal corroding the furnace wall emerges.In order to study the erosion mechanism of the hot metal circulation,physical model of the blast furnace hearth with a deadman was established.Using the method of numerical simulation,the formation mechanism of the erosion shape of‘‘garlic’’by analyzing the transient flow field and the shear force in the bottom of the furnace.The results indicate that in the process of discharge,the“garlic-shaped”erosion was most likely seen in the area right below the taphole for the reason that a comparatively large zone of high speed pointing toward the side of taphole,as well as the high stress zone appears nearby the taphole.