A New Method and a Device for Fast Testing the Quality of Nodular Cast Iron in Ladle

摘要

In the paper, a new method and a device for fast testing the quality of nodular cast iron in ladle are advanced. The new method is named with amplitude and frequency equivalent of bubbles and its foundation is to take the change of pressure value in the bubble and the frequency of blowing bubbles as the characteristic values and then to obtain the equivalent by which the nodular cast iron surface tension can be calculated and graphite shape in the cast iron can be known before casting. The device depends on the new method mentioned above consists of a heat-resistant and replaceable detector and a microcomputer data acquisition system. The new method and the device have advantages of convenient operation, high resolution ratio and anti-jamming ability.