| 摘要 |
FIELD: metallurgy.SUBSTANCE: method for steel pouring to a steel-pouring ladle involves pre-deoxidation and alloying with manganese-containing ferroalloys, out-of-furnace metal treatment is performed at a circulation steel vacuumising plant; at that, negative pressure is set in a vacuum chamber for not more than 10 mbar and argon consumption for mixing is 0.8 to 1.1 l/(t*min). After that, final deoxidation and metal alloying in the vacuum chamber is performed with aluminium shot in the quantity of 1.5?2.5 kg/t in terms of obtaining the required content of aluminium in metal. At that, total duration of vacuumising is set from 10 to 15 minutes.EFFECT: invention allows maximum elimination of non-metallic inclusions, reduction of aluminium consumption and stabilisation of metal pouring process owing to improving poured steel quality. |
