Rapid flow-detection method for the midsized ladles and for the large-sized crucibles

Abstract

The cracks detection method for the ladles and crucibles by means of the self oscillations (SO) frequency measuring is the further development of the method for the physical and
mechanical characteristics determination by means of the SO frequency measuring used for the crucible's material. The physics of the method is that the self-induced vibrations
are set up in the presence of the free energy which has to embrace the whole item and to generate various forms of the SO. If the item has cracks, they intercept the free energy
spreading over the whole item's body and some kind of the SO are not generated. The proposed method is based on the fact that it allows to determine the absence of some
oscillationa. The method enables to test one item withing from 3 to 15 minutes depending on the size of the item. The experimental results are given in the article for six ceramic
crucibles of the volume of 20,8 liters which confirmed the method effectiveness. Ill. 2. Ref. 4. Tab. 1.