DE1558164A1 - Method and device for casting metals - Google Patents

Description

Dr. Karl Th. Hegel '_- "-, -.

Patent attorney 1558164 ^2OO ° Hamburo 36, April 7, 1967

Esplanade 36 a

Telephone 34 β1 31 . ■

Postal checking account: Hamburg 20Q6 24 Bank: Dresdner Bank AQ., S2S76 / 10,

Depoeitenkaeee Esplanade New address from April 1st, 1967:

Te.e _O ramm-Adres _S e: Döl.nerpatent ^ ^ \ ^ ΗβΙ | β1. ΟΓ. H. toeyS

Patent attorneys

• 2000 Hamburg 52, Giesestr. 8th

New phone number: 89 28 03

ARBED, Acieries Reunies de Burbach-Eich-Dudelange S.A., Luxembourg

Method and device for casting metals

(Addition to patent application A 5 ² J- 2J6 VIa / 31b)

For this registration, the priority is from Claimed 19 April 1966 from the Luxembourg supplementary application no. 50 927.

In the patent application A 5 ^ 236 VIa / 51 b is a method for Pouring a metal into a mold described * in which the pouring jet against the ingress of atmospheric oxygen through a Pouring pipe is protected, which is immersed in the liquid Gießgwt and extends as far as possible to the bottom of the mold. Alloy additives and / or deoxidizing agents can also be used be added to the casting compound. This way of working is important when the cast metal has special properties should have. Usually the alloying and deoxidation treatments are carried out in the ladle. Since that liquid metal according to the above-mentioned patent application practically no longer comes into contact with atmospheric oxygen, the equilibrium achieved in the ladle can no longer be disturbed later. The substances to be added are preferably used in granulated form.

009812/0670 " ² "

According to the invention, such additives are added with complete exclusion of atmospheric oxygen. For this purpose, the Additives are filled into a container, in which preferably a certain pressure of a neutral gas, such as for example argon, or a reducing gas such as carbon monoxide, is maintained. The addition can also be carried out mechanically with the exclusion of air.

Said container can via a line through which the entire system is protected against the ingress of atmospheric oxygen, with the pouring pipe of the Prischofens or the Be connected to the ladle. The device used is designed so that it is both regulated and controlled Addition during a certain period of time, as well as one addition at a time, is permitted. In this way it is possible to create a To obtain casting block whose surface and core have a different composition and different properties exhibit. If the substances to be added are transported by means of a neutral or deoxidizing gas, the result is the further advantage that when it ascends through the metal from bottom to top, any inclusions that may still be present get carried away.

As an exemplary embodiment of the invention, a schematic representation of one that can be used according to the invention is shown in the accompanying figure Device shown.

The container (1) is equipped with a lid (2) which is provided for filling in the substances. In the line (5), which connects the container (1) with the pouring pipe (7), a shut-off valve (3) and a regulating valve (4) are attached. The connecting line (5) is through a heat-insulating Layer (6) protected. The connection piece (8) has two valves (9), which allow the supply or escape of the gas used to create the pressure atmosphere. The container (1) and the pipe (5) are attached to the ladle.

009812/0670

Claims (1)

Claims 1. Method of casting a metal with the addition of the substances intended for its final treatment, such as steel from the fresh furnace or from the ladle into a Casting mold with the help of a pouring pipe that extends to the ground close to the Casting mold or immersed in the metal cast therein, according to patent application A 54 2J56 Vla /> 1 b, characterized in that the addition of the substances to be added with complete exclusion of air he follows. 2. The method according to claim 1, characterized in that the addition of the substances to be added under the pressure a neutral or reducing gas takes place. 5. The method according to claim 1, characterized in that that the addition takes place directly into the pouring tube. 4. The method according to claim 2, characterized in that that the gas to be added transporting gas is introduced at the bottom of the casting mold so that it rises when it rises deoxidation products through the bath from bottom to top or entrains bullets and escapes on the surface of the poured metal. 5. Device for performing the method according to the Claims 1 - 4, characterized by one for the recording a pressure atmosphere suitable container (I) - which is equipped with a Filling the substances serving lid (2) is equipped and with a shut-off valve (?) And a regulating valve (4) having and provided with a heat-insulating protective layer (6) connecting line (5) to the pouring pipe (7) of the Prischofens or the ladle is connected, the container (1) having a connector with valves (8, 9) for the supply or the Escape of the one used to create the pressure atmosphere Has gas, and the container (1) and the connecting line (5) preferably attached to the fresh furnace or to the ladle 0098 12/067 0 Blank page