高炉炉缸内铁水流动特性的物理模拟

采用原型尺寸且死料柱采用冶金焦堆积而成,针对某实验高炉炉缸铁水流动特性进行水模实验,研究了出铁流量、出铁口深度以及铁水液面高度对铁水流动的影响.研究结果表明,大流量出铁时加剧了铁水对炉缸的流动冲刷,加深出铁口可以减缓这种冲刷,对高炉长寿是有益的.

高炉非稳态出铁过程中死料柱状态对铁水流场影响的数值模拟

高炉炉缸内由于存在死料柱,所以铁水流动情况非常复杂。利用FLUENT软件的VOF方法进行数值模拟,研究了高炉出铁过程中死料柱的形状和状态对炉缸内铁水非稳态流动的影响。结果表明,不同形状死料柱在沉坐和浮起状态下,均有铁水环流、漩流产生,出铁口远端有混流产生;其中圆柱形死料柱在浮起状态下,炉缸内有非对称的漩流产生;圆弧形死料柱在浮起状态下,炉缸内有大量旋流产生。死料柱在沉坐和浮起状态下,炉缸底部较大剪应力主要分布在铁水环流和漩流区域,以及出铁口附近区域。死料柱浮起状态下对炉缸内铁水流动影响较大。

氧化镁对铁矿石烧结特性的影响

高炉渣中的MgO给铁水流动性和脱硫提供了最佳条件。MgO对高炉渣的影响已做过许多研究，但对烧结和烧结矿质量的影响还不清楚。一项关于氧化镁对铁矿石烧结特性影响的研究得出以下结论。

可锻铸铁炉前快速判定C、Si含量的方法

通过观察铁水流动、铁花飞溅、铁水表面花纹和观察炉前三角试片等方法,快速、准确的判定铁水C、Si含量,为获得优质的可锻铸铁毛坯打基础。

Material flow control technology of ironmaking and steelmaking interface

In order to achieve higher efficient cohesion match of procedure and equipment between ironmaking and steelmaking interface, the theory of multi-dimensional material flow control was applied to analyze torpedo ladle-iron ladle transportation process between blast furnace and basic oxygen furnace. Moreover, basic parameters of material flow were analyzed and optimized, such as time, temperature and material quantity. Based on operating principles of material flow, control methods were optimized, such as product organization mode, scheduling discipline and scheduling plan of hot metal ladle. Finally, the material flow control technology of ironmaking and steelmaking interface was integrated. Satisfactory effects are obtained after applying the technology in practice. The total turnover number of torpedo ladle decreases from 20 to 18, the hot metal temperature of 1# BF torpedo ladle decreases from 36 °C to 19.5 °C, the hot metal temperature of 2# BF torpedo ladle decreases from 36.6 °C to 19.8 °C, the temperature drop of desulfurization hot metal decreases by 4 °C, and the temperature drop of non-desulfurization hot metal decreases by 2.8 °C. Furthermore, the ironmaking and steelmaking interface system will realize high-efficiency control by using this control technology.

铁口数对高炉炉缸铁水环流的影响

高炉炉缸内高温液态渣铁的环流冲刷是造成炉缸、炉底侵蚀的重要原因之一。由于炉缸内状况属于＂黑匣子＂,目前其内部铁水流动状况没有直接准确的测定方法。基于计算流体力学,在炉缸内不同死料柱的状态下,单、双铁口出铁时,对炉缸内铁水流动行为进行研究,得到炉缸内铁水流线、速度分布情况。模拟结果显示,单铁口或夹角为40°的双铁口出铁时,在死料柱沉坐且中心为碎焦的状态下,炉缸内铁水环流最严重;双铁口同时出铁时,选择铁口夹角为钝角的出铁方式,可以减少铁水对炉缸、炉底的冲刷;死料柱沉坐会加剧炉缸铁水环流,死料柱浮起有利于减缓炉缸铁水环流,但是加剧了其在炉底的流动。