Investigation of molten metal mixing in a DC electric arc furnace with added AC component on different frequenciesMõlder, Heigo; Järvik, Jaan; Vaimann, Toomas; Gordon, RaunoPQ2012 : 8th International Conference : 2012 Electric Power Quality and Supply Reliability : June 11-13, 2012, Tartu, Estonia : conference proceedings2012 / p. 33-36 : ill Multi-electrode arc furnace technology with improved metal processing capability using current driven mixingMõlder, Heigo; Järvik, Jaan; Vaimann, Toomas; Gordon, RaunoConference proceedings : 2012 11th International Conference on Environment and Electrical Engineering : Venice, Italy, 18-25 May 20122012 / p. 313-316 : ill