Fluorine-free mold powders

Details Fluorine-free mold powders Fluorine-free mold powders

1989-02-06

1989-11-14

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

75 53, 164473, C21B 504

Patent

active

048804630

ABSTRACT:
A glass frit composition having the theoretical oxide values (in weight %) of 0.5-9 Li.sub.2 O, 29-38 Na.sub.2 O, 0-25 CaO, 5-10 B.sub.2 O.sub.3 and 38-50 of SiO.sub.2 is characterized in that it is virtually fluorine-free and was found to be eminently suitable in its molten form as a lubricant in the continuous casting of steel. The invention is thus related to a lithium containing fluorine-free frit composition and in a second aspect to an improvement in the process for the continuous casting of steel, the improvement comprising using as a lubricant the glass frit composition referred to above.

REFERENCES:
patent: 3501291 (1970-03-01), Schneider
patent: 3649249 (1972-03-01), Halley et al.
patent: 3721547 (1973-03-01), Dvorak
patent: 3827880 (1974-08-01), Greeson
patent: 3899324 (1975-08-01), Corbett
patent: 3942977 (1976-03-01), Fishwick
patent: 3976474 (1976-08-01), Wunder
patent: 4092159 (1978-05-01), Uher
patent: 4204864 (1980-05-01), Loane et al.
patent: 4290809 (1981-09-01), Loane

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