FIELD: non-iron metallurgy, method for high-chromium (more than 9 % of chromium content) intermediate melting in electric arc furnace followed by refining in bottom-blowing converter.
SUBSTANCE: claimed method includes melting of steel waste and alloy additives, deoxidizer feeding, and slag foaming in electric furnace. Than chromium containing in slag is reduced; oxygen is fed into bath, intermediate and slag discharged into overflow ladle, slag is skimmed, metal is charged into bottom-blowing converter, melt is decarbonized, and desired chemical composition is adjusted. For finished and fuller chromium reducing slag-forming additives and deoxidizers are fed in process of intermediate and slag discharging into overflow ladle, when said ladle is filled on 2/3. Method of present invention makes in possible to increase chromium yield from slag at least to 70 %.
EFFECT: increased chromium yield, decreased ferrous alloys consumption, accelerated melt process and reduced energy consumption.
2 cl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF BLOWING HIGH-CHROMIUM STEELS | 2004 |
|
RU2268948C2 |
| METHOD OF SMELTING OF THE STAINLESS STEEL INTERMEDIATE PRODUCT IN THE ARC ELECTRIC FURNACE | 2005 |
|
RU2295575C2 |
| METHOD FOR SMELTING HIGH-CHROMIUM ALLOYS AND MASTER ALLOYS AND CHARGE FOR CARRYING OUT THE METHOD | 0 |
|
SU1038365A1 |
| METHOD OF SMELTING MEAN AND HIGH-CARBON LOW-ALLOY STEELS | 0 |
|
SU804695A1 |
| METHOD OF MAKING STEEL IN ELECTRIC ARC STEEL MELTING FURNACE | 2006 |
|
RU2302471C1 |
| METHOD FOR SMELTING STEEL | 0 |
|
SU1027235A1 |
| METHOD OF STEEL MANUFACTURING IN ARC STEEL-SMELTING FURNACE | 2006 |
|
RU2333257C1 |
| METHOD OF DEOXIDIZING AND ALLOYING VANADIUM-CONTAINING STEEL | 1995 |
|
RU2064509C1 |
| METHOD OF RAIL STEEL SMELTING | 2006 |
|
RU2333256C1 |
| HIGH-GRADE ALLOY STEEL PRODUCING METHOD | 2005 |
|
RU2293125C1 |
