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为了实现缩短出钢时间从而提高碱性氧气转炉(BOF)的生产效率,与熔融分析控制相关的过程如停吹、提枪或倾炉都要避免。为了达到这个目标,建立了一种用于控制BOF过程的新方法。该方法采用了一种新颖的、可在吹炼过程中进行炉渣和钢同时收集的非均相取样器,并应用了为此专门设计的激光分析方法(LIBS)。使用该方法,目标是尽可能快地完成非均相取样器收集的炉渣和钢的分析(Fe,C,P,S等元素)。除了建立非均相临线取样方法外,还建立了一种基于LIBS的特殊分析程序,当分析过程中移动非均相样品时,用于识别来自炉渣和钢的激光光束。与冶金模型相结合,由非均相取样器得来的数据经过处理后,可动态评价精炼进展状况并规定矫正行为,从而实现安全直接的出钢。预期的效益在于减少再吹炼的比率、节省出钢时间(预计每炉能缩短2~3min),同时延长耐火炉衬的寿命,提高生产产量。
In order to shorten the tapping time and improve the production efficiency of basic oxygen furnace (BOF), the processes related to melt analysis and control, such as stopping blowing, raising a gun or tilting the furnace, should be avoided. In order to achieve this goal, a new method for controlling the BOF process has been established. This method uses a novel heterogeneous sampler for the simultaneous collection of slag and steel during the blowing process and uses a specially designed laser analysis method (LIBS) for this purpose. Using this method, the goal is to complete the analysis of slag and steel collected by a heterogeneous sampler (Fe, C, P, S, etc.) as quickly as possible. In addition to establishing a heterogeneous linq sampling method, a special LIBS-based analysis program was developed to identify the laser beam from slag and steel as the heterogeneous sample was moved during the analysis. In combination with the metallurgical model, data from a heterogeneous sampler can be processed to dynamically evaluate the refining status and prescribe corrective actions to achieve safe and direct tapping. The expected benefit is to reduce re-blowing ratio, save tapping time (shortened by 2 ~ 3 minutes per furnace), prolong refractory lining life and increase production output.