摘要 |
<p>Direct-current smelting furnace with control of deflection of the electric arc, which comprises an upper electrode (13) with relative return-flow lines and a plurality of bottom electrodes (11) positioned on the hearth of the furnace (12) and arranged in two or more assemblies, each assembly having its own controlled supply line connected to its own transformer (16), there being included downstream of each transformer (16) its own thyristor rectifier assembly (17) associated with its own means to control voltage (26), current (24) and firing angle (23), at least the lines supplying the bottom conductors (32) being at least partly screened in the vicinity of the melting furnace (12) <IMAGE></p> |
申请人 |
DANIELI & C. OFFICINE MECCANICHE S.P.A., BUTTRIO, UDINE, IT |
发明人 |
BERGMAN, KJELL, S-72481 VASTERAS, SE;LUNDSTROM, KENNETH, S-72242 VASTERAS, SE;GRANSTROM, STAFFAN, S-94332 OEJEBYN, SE;GENSINI, GIANNI, I-33030 S. STAFANO-BUIA (UD), IT;COASSIN, GIOVANNI, I-33170 PORDENONE, IT |