论文部分内容阅读
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2～3 min),同时延长耐火炉衬的寿命,提高生产产量.“,”In order to achieve shorter tap to tap time and hence higher productivity at the BOF, process events related to the control of the melt analysis such as stop of oxygen blow, lance withdrawal or vessel tilting have to be avoided. To reach this goal, a new method for controlling the BOF process has been developed. It involves the use of an original in-blow heterogeneous sampler simultaneously collecting slag and steel and a dedicated laser analytical method (LIBS). With this method, the aim is to deliver as quickly as possible a complete analysis of the steel and slag collected by the heterogeneous sampler (Fe, C, P,S... ). Besides the setting-up of the heterogeneous in-line sampling, a specific analytical procedure, based on LIBS, has been developed in order to recognise, when moving the heterogeneous sample during its analysis, the laser shots coming out from slag and steel. Combined with a metallurgical model, the processing of the data generated with the heterogeneous sampler lead to dynamically assess the state of the refining progress and to define the corrective actions in order to allow a safe direct tapping practice. The expected benefits will be a reduced reblow rate, a tap to tap saving (a gain of 2 - 3 minutes per heat can be expected), as well as an increased refractory lining life and process yield.