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Study on Failure and Refining Effect of Purging Plugs with Different Slits

Wednesday, February 03, 2021

Due to severe service conditions, the life span of purging plugs is shorter than the lining of ladles, which results in lower production efficiency. To investigate the stress distribution, the thermal-solid modeling was applied to simulate the refining process experience by the purging plug.

Subsequently, the thermomechanical behaviour of purging plug with circular slits and rectangular slits were compared to evaluate structural optimisation. Furthermore, two kinds of the purging plug also were chosen to compare its the mixing time and inclusion removal rate. The simulation result indicated that instead of rectangular slits, the circular slits not only alleviate the stress concentration around the slit effectively but also reduce the maximum axial tension stress of the purging plug. Furthermore, the purging with circular slits has better performance in the inclusion removal rate.

Keywords: stress concentration, water model experiment, mixing time, inclusion removal rate, ladle metallurgy