| 摘要 |
A method of controlling contamination of, and alloy variations in the remelted product of an electro-slag refining (ESR) or remelting process. More particularly, this invention is directed to a slag forming flux, to the timing and/or manner in which the flux is utilized during such method, and to a slag deoxidizer. The controls are achieved by the sequential additions of a (1) flux of predominantly CaF2/Al2O3 with the balance a mixture of SiO2 and MnO, and (2) a non-aluminum containing slag deoxidizer such as CaSi. Preferably, the flux is added in two portions about one-third at start-up with the remainder after the start-up portion has melted to form a slag blanket. As a preferred alternative, the total amount of SiO2/MnO of the flux is added with the start-up portion and the remainder portion comprises essentially only CaF2/Al2O3.
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