Reduction Behavior and Influencing Factors of Alumina in Ironmaking Slag
Ironmaking slag is a large amount of solid waste generated during the steel smelting process,which contains a certain amount of alumina.The reduction behavior and influencing factors of alumina in ironmaking steel slag were mainly studied.Through thermodynamic calculations and high-temperature experiments,the influence of factors such as reduction temperature,reducing agent dosage,and reduction time on the reduction rate of alumina was explored.The results indicate that increasing the reduction temperature,increasing the amount of reducing agent,and prolonging the reduction time can all improve the reduction rate of alumina.Under the conditions of 1 400 ℃,a mass ratio of reducing agent to slag of 1.5,and a reduction time of 120 min,the reduction rate of alumina can reach over 85％.The slag coefficient also has a significant impact on the reduction process.As the slag coefficient increases,the reduction of alumina first increases and then decreases.The reduction rate is highest when the slag coefficient is around 1.2.By optimizing the reduction conditions,it is possible to effectively reduce and recycle alumina in ironmaking steel slag,providing new ideas and methods for the comprehensive utilization of steel slag.
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