The contrast experiment of different stirring modes, which includes a new type of stirringinjection with the method of pulse and rotation, and the initial oneway stirring method, is done through physical simulation in the laboratory. The stirring methods of pulse and rotation are of two kinds. One is pulsed and rotary stirrer with positive and opposite directions. The other is pulsed and rotary stirrer with rotationstoprotation. The results show that the stirring mode of pulse and rotation has better effects than the oneway stirring method. The specific effects are that the mixing time of the melting bath is apparently shortened, the number of grains involved in the liquid surface is increased, and the residence time of air bubble in water is doubled.
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