SU505510A1 - Device for casting metals and alloys - Google Patents

Description

one

The invention relates to metallurgy, in particular to the casting of metals and alloys into molds or continuous casting molds.

Devices for discharging metal from a ladle are known, containing a pouring cup embedded in the bottom, a protruding bucket, with inlet ducts in the walls of the cup communicating with the central inlet duct (US Patent N ° 3556360 dated January 15, 1965, Cl. 222-559) .

A disadvantage of such devices is the difficulty of ensuring smooth control of the metal outlet.

Filling devices with elongated cups partially located in the working cavity are also known, in which the outflow is controlled by changing the size of the side openings in the upper part of the elongated cup (see application no. 1756165 / 22-2 dated March 6, 1992, for which positive decision).

When such devices are used, a stable outflow of metal is not ensured at low consumption and does not guarantee the complete cessation of expiration due to a possible disruption of the normal operation of the stopper, the sliding shutter or the cap with slit on the cup when ejected by the refractory liquid with liquid metal or freezing of the latter in the areas of mutual displacement gates elements.

The aim of the invention is to reliably ensure accurate control of metal outflow from a casting device, including at low cost, and guarantee the termination of casting at any time.

The goal is achieved by the fact that the proposed device is provided with at least one refractory rod installed with the possibility of vertical reciprocating movement between the wall of the lining of the working cavity of the device and the elongated glass, the latter being made protruding into the working cavity of the device 0.2- 0.8 its height.

Pa drawing shows the proposed device with a cut along aa.

The device contains a container 1 with an elongated refractory cup 2 mounted in its bottom, a working cavity projecting B at 0.2-0.8 of its height, as well as under its bottom.

The pad of the working cavity of the container between the cup and the surface of the lining of the side walls of the tank is installed with the possibility of returning the vertical refractory vertical displacement 3. The refractory rod can be lowered using any known fixture

up to the contact of its lower end with the lining of the bottom of the container 1 or to lift it up to its withdrawal from the working cavity of the container.

Depending on the number of simultaneously cast ingots or blanks, the proposed device can be made with several elongated glasses protruding into the working cavity of the device. To enhance the ability to precisely control the rate of metal outflow, the device can be equipped with several rods.

The proposed device works as follows.,

After preheating the liner of the container and the refractory rod, the metal is poured into the working cavity of the container 1 to a position at which its level is 1-2 diameters of the glass below the upper end of the glass.

To start casting, the rod is immersed in the metal filling the container until the position at which the level of the latter in the working cavity of the container rises above the upper end of the glass. At the same time, the outflow of metal through the glass begins at a rate determined by the distance between the level of the metal above the upper end of the glass and the size of the cross section of the latter.

The flow rate is controlled by moving the metal level with respect to the upper end of the glass provided by raising or lowering the refractory rod immersed in the liquid metal. In this case, in the event of a rod being lowered, the metal level in the tank rises and the flow rate of the metal increases, and when the rod is raised, the metal level drops and the flow rate decreases. Since the flow rate is proportional to the square root of the height of the liquid column above the glass opening, a slight adjustment of the rod results in a fine adjustment of the flow rate of the cast metal. In order to completely stop the casting, the rod is raised to a position at which the metal level is below the upper end of the glass.

To completely empty the device from metal residues after completion of the casting and decrease the metal level in it below the upper section of the cup 2 in the bottom 1; drain device 4 is mounted in the device with the usual stopper 5 opened only after the end of the casting, or in the upper part of the device there is a drain sock, through which the remnants of the metal is drained by tilting the device.

In the proposed device, it is possible to use odia or simultaneously several refractory immersed rods in combination with one or several glasses.

The proposed device not only provides the case and precise control of the metal outflow, but also almost completely excludes the possibility of the metal freezing in the glass, since the latter is heated for the greater part of its length by the liquid metal both from the inside and the outside.

The shape of the working cavity of the device in plan can be rectangular, circular or multi-faceted, and the glasses can be located along the middle of the cavity, in close proximity to its walls or in the corners.

Claims (1)

Invention Formula A device for casting metals and alloys, containing a container with a refractory lining and mounted in its bottom, at least one elongated cup protruding into the working cavity of the device and under the bottom, characterized in that, in order to reliably ensure accurate regulation of metal outflow and stop casting, the device is equipped with at least one refractory rod installed with the possibility of reciprocating movement between the lining wall of the working cavity of the device and an elongated glass , while the latter protrudes into the working cavity of the device at 0.2-0.8 of its height. Metal