DE1139239B - Process for the production of cast iron blocks from steel or iron - Google Patents

Description

The subject of patent 1097 090 is a process for the production of cast ingots made of steel or iron or their alloys with a smooth surface and great internal purity by pouring the metal into a mold which contains a slightly liquid slag consisting essentially of silica, aluminum oxide and lime exists, whereby the lime can also be partially replaced by magnesia. When overheated, this slag has a high interfacial tension with respect to the metal to be cast. The mold is then quickly and completely or almost completely ^{filled with the slag, which is very strongly superheated, preferably to about 1700 °} C., and the previously cleaned metal is then poured into the liquid slag immediately so that the metal and slag initially mix intimately, but before solidification separate the metal again. The slag that flows off is collected and used again.

While plug pans are generally used in ingot casting of steel at present, it has proven to be useful in the above-mentioned process, the metal in the slag to pour filled mold from a ladle over the muzzle, the ladle preferably around the pouring spout is rotatable. Depending on the shape of the mold, the ladle moves directly into the mold poured or through an interposed damper, which is a simple funnel for centering of the ray can be.

In the method according to the invention, inclusions Avoided of refractory particles in the ingot, which would otherwise be caused by the pouring stream from the out Nozzle and stopper are torn out of the existing closing device; this also means that the high consumption of refractory material due to the replacement of these parts.

Preheating the ladle to high temperatures is possible without difficulty. The pan can be used again immediately after watering, as long as it is still hot and with a thin Layer of viscous slag is lined.

As a result of the ladle preheating, slag reheating and continuity of the casting process, cold casting is also used, which is inevitably used for metallurgical reasons and often to certain preparatory work, e.g. B. the application of a vacuum, is bound, made possible.

Method of manufacture
of cast ingots made of steel or iron

Addendum to patent 1 097 090

Applicant:

Societe d'Electro-Chimie

d'lectro-Metallurgie et des Acieries

Electriques d'Ugine, Paris

Representative: Dr.-Ing. A. v. Kreisler,

Dr.-Ing. K. Schönwald and Dr.-Ing. Th. Meyer,

Patent attorneys, Cologne 1, Deichmannhaus

Claimed priority:
France of November 18, 1955 (No. 702 797)

Andre Greife, Annecy, Haute-Savoie.

and Henri Jolivet,

Neuilly-sur-Seine, Seine (France),
have been named as inventors

The ingots obtained have great internal purity and a healthy casting skin and need practically not to be exhausted.

Claims (1)

PATENT CLAIM: Process for the production of cast ingots from steel or iron or their alloys with a smooth surface and great internal purity by pouring the metal into a mold containing slightly liquid slag according to Patent 1097 090, characterized in that the metal is poured into the mold filled with slag from a ladle is poured over the spout, wherein the pouring ladle is preferably rotatable about the pouring spout. Considered publications:
German Patent Nos. 94 385, 188 638, 220035, 363 839, 823 324.