Oxygen determination method for reduced oxides contained in steelmaking slag

摘要

PURPOSE:To accurately detect the amount of oxygen of an oxide to be reduced contained in steelmaking slag. CONSTITUTION:A sample sampled from a steelmaking slag is heated continuously within an inactive atmosphere and is allowed to react with carbon source, the amount of oxygen which is connected to carbon and is unloaded from a system is measured in time series, and then the amount of oxygen of easily reducing metal oxide such as Cr, Ni, Fe, and Mn which are reduced by Si in melted state is obtained from the integral value of a measurement result. Also, in the similar manner, X rays are applied to a sample sampled from the steelmaking slag, the fluorescent X-ray intensity of the constituent element of hardly reducing metal oxide such as Si, Ti, Al, Ca, and Mg to be generated is measured, and then oxygen which combines with the constituent elements is determined. The amount of oxygen of the oxide contained in the steelmaking slag is determined and analyzed according to the amount of oxygen of the easily reducing metal oxide and the hardly reducing metal oxide. Therefore, the easily reducing metal oxide and the hardly reducing metal oxide can be accurately subjected to oxygen determination, thus obtaining a needed amount of reducing agent accurately and manufacturing melted steel which is subjected to constituent adjustment accurately.