Abstract: A device for coating steel sheet surfaces by hot immersion in continuous coating lines, is provided, including several driving rollers disposed against the surface of the sheet to be coated, complemented by tensioning rollers and an inert gas stream, in this case nitrogen, acting on the cutting edges of the scrapers and against the surface of the coating driving rollers.
Type:
Grant
Filed:
August 8, 1996
Date of Patent:
August 11, 1998
Assignee:
Comesi S.A.I.C.
Inventors:
Horacio Carlos Falia, Carlos Ignacio Rojas, Federico Arturo Turtl
Abstract: A process cleans inductor channels of furnaces melting non-ferrous metal alloys wherein the coating alloy has a minimum of zinc content of 50% by weight which is subject to softening, dilution and floating of DROSS heavy slag which obstructs the inductor channels. The slag is removed by mechanical action of hammer-shock powered lances with slicing fins presented at a contact end of the lances. Cleaning of the slag is aided by a nitrogen gas stream acting within inductor channels.
Type:
Grant
Filed:
March 30, 1995
Date of Patent:
January 7, 1997
Assignee:
Comesi S.A.I.C.
Inventors:
Ivo Baeck, Horacio H. Fernandez, Horacio Llano, Ricardo M. Ali
Abstract: A mechanical device is provided for scraping rollers immersed into an alloy bath through gas feeding, which extends the life of the rollers from several days to several weeks. The device has pairs of scrapers with hard steel cutting edges acting against the roller surfaces along with the fluid action of an inert gas injected through the inner portion of the mechanical scraper.
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