Molten metal treatment

Details Molten metal treatment Molten metal treatment

1980-01-23

1981-10-27

Rosenberg, P. D.

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By means introducing treating material

75 93R, 75130R, C21C 700

Patent

active

042969204

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: 2781260 (1957-02-01), Grandpierre
patent: 2809886 (1957-10-01), Klingbeil
patent: 2869857 (1959-01-01), Kopke
patent: 3137753 (1964-06-01), Feichtinger
patent: 3666449 (1969-01-01), Alt
patent: 3724829 (1973-04-01), Alt
patent: 3991988 (1976-11-01), Kawai
patent: 4214899 (1980-07-01), Radzilowski
E. Modl, "Comparing Processes for Making Ductile Iron," Foundry (Jul. 1970).

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