Molten metal treatment

Details Molten metal treatment Molten metal treatment

1977-06-13

1980-04-22

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 58, 75 93G, 75129, 75130B, C22B 900, C21C 700

Patent

active

041993535

ABSTRACT:
In treating cast iron with magnesium to produce nodular iron, a capsule of heat-resistant material, closed except for calibrated limited access passages, containing the magnesium, is plunged into a bath of molten metal in a tall vertical ladle while the latter is capped by a hood to contain the violent reaction resulting. An elevating mechanism lowers and raises the hood and capsule and plunges and withdraws the capsule while the hood caps the ladle. The mechanism includes a plunging rod carrying the capsule and means for maintaining the rod in a fixed radial position relative to its axis and for restraining it against the force of the reaction.

REFERENCES:
patent: 2550735 (1951-05-01), Tour
patent: 3598575 (1971-08-01), Jarysta
patent: 3666449 (1972-05-01), Alt
patent: 3681050 (1972-08-01), Veki
patent: 3681051 (1972-08-01), Takashima
patent: 3724829 (1973-04-01), Alt
patent: 3802680 (1974-04-01), Anders
patent: 3837842 (1974-09-01), Tanoue
patent: 3841616 (1974-10-01), Rocher
patent: 3865577 (1975-02-01), Gottschol
Modl, "Comparing Processes for Making Ductile Iron", Foundry, pp. 42-48, Jul. 1970.

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