Abstract：The technological development process in rapid detection of molten steel composition in steelmaking as well as the current mainstream technological achievements, including the process flow, process layout, pneumatic sampling system, automatic sample preparation system, automatic spectral process optimization, and automatic fluorescence flow optimization in fully automatic rapid analysis systems, were introduced in this paper. In particular, the contents included the breakthroughs in some new technologies, technical characteristics and application experience such as spectral manipulator, dual vision analysis system, automatic spectral development, automatic reporting of spectral results, automatic judgment of abnormal points, improvement of converter sample analysis speed, and preference setting of special steel. Moreover, the replacement of carbon-sulfur meter by X-ray fluorescence spectrometer(XRF) for hot metal desulfurization analysis, the replacement of grinder by milling grinder for processing iron samples, and use of the latest technologies for grinding tablet press were also introduced. The fully automated laboratory was a leap in the rapid analysis process of molten steel in steelmaking. It was started from the import of a complete set of software and hardware, including pneumatic sample pipelines. After years of optimization and improvement, and on the basis of fully digesting and absorbing advanced foreign technologies, the domestic automatic analysis systems had comprehensively broken through in terms of process flow, precision control, inspection cycle, and operational effectiveness. In addition, the future prospects of rapid analysis of molten steel in steelmaking was also discussed.
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