UTILISATION OF NOISE LEVEL EMITTED BY THE ELECTRIC ARC FURNACE (EAF) FOR OPTIMISATION OF THE FEEDING PROCESS OF SLAG FOAMING MATERIALS

The present paper reveals methodology of a research and the results of noise level measurements with respect to fluctuations of active power during EAF operation in one of the melt shops in Poland. In the current stage of ex-periment, the authors focused themselves on finding the optimum moment to start feeding of foaming material with the aim to obtain the most efficient slag foaming with the fastest coverage of electric arcs at the lowest losses of foaming material. Achieved results indicate that relation between the level of emitted noise and fluctuations of active power during melting can be utilised to define the moment to start feeding of slag foaming materials into the furnace.