Effect of air quenching process on granulation of AOD stainless steel slag
ZOU Jing-jing1,2, MA Guo-jun1,2, YAO Wang-long1,2, ZHANG Xiang1,2
1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 2. Hubei Provincial Key Laboratory of New Processes of Ironmaking and Steelmaking, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Abstract：To improve the stability of stainless steel argon oxygen decarburization(AOD) slag, the AOD slag was granulated by air quenching, and the influences of slag basicity, modifier, slag temperature, flow velocity, and injection angle on the slag granulation result were studied. The results showed that with the slag basicity decreasing, the mean diameter firstly decreased to the minimum mean diameter of 4.31 mm at the basicity of 1.8 and then gradually increased. After the adjunction of B2O3, with the decrease of basicity the change trend of the mean diameter of the slag was the same with before modification, but the mean diameter overall decreased. With the temperature of the slag increasing, the mean diameter of the slag increased. With the flow velocity increasing and the injection angle decreasing, the mean diameter of the slag gradually decreased to the minimum mean diameter of 3.67 mm at the flow velocity of 21.5 m/s; the minimum mean diameter of the slag of 4.28 mm was obtained at the injection angle of 25°.
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2021, Vol. 31 
