Abstract
The endpoint carbon content and temperature prediction of basic oxygen furnace (BOF) steelmaking is an important component part of BOF steelmaking process control. The flame temperature indirectly reflects the molten steel temperature and the temperature of the furnace slag. The flame spectrum consists of the background spectrum and the characteristic emission spectrum. The pairs of atomic emission spectral lines of sodium (589.03nm) and potassium (766.4nm and 769.78nm) exist in the flames of basic oxygen furnace. The flame temperature relies on the ratio of the relative intensities of the spectral lines. This paper presents a method for flame temperature measurement by calculating the intensity ratio of the emission spectral lines of potassium, and then analyzes the error transfer. The results indicate that the temperature calculated by the characteristic emission spectrum is inosculated to the temperature obtained by sub-lance equipment comparatively.
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