RU2691021C2 - Pouring device for pouring metal from tundish into molds - Google Patents

Abstract

FIELD: metallurgy.SUBSTANCE: invention relates to pouring steels and alloys in a vacuum-induction furnace, and can be used in shops of metallurgical plants to control the rate of pouring metal from the tundish into molds. Pourer for pouring metal from the tundish to the molds comprises a pipe-shaped housing of refractory material and is installed in the seat of the tundish, and is made in form of two steel-pouring channels of different length, located at different height relative to tundish bottom and at same level relative to upper horizontal plane of mold, wherein the upper plane of the short steel-pouring channel coincides with the bottom plane of the tundish.EFFECT: enlarging technological capabilities of steel and alloys casting process in vacuum induction furnaces.1 cl, 5 dwg

Description

The invention relates to metallurgy, in particular to the casting of steel and alloys and can be used in the shops of metallurgical plants to control the speed of casting metal from tundish into molds.

A device for casting steel, containing a tubular body with a casting channel and outlet openings through which the melt enters the melting bath. In the area of the second end portion of the housing, a chamber is provided, which extends in the direction of the molten metal flow behind the corresponding outlet orifice and extends towards the first end portion (see ed. Reference RU No. 2476292 C2, cl. B22D 41/50, published 2009 ).

A disadvantage of the known device is that it is aimed at preventing gas bubbles from the tundish from falling into the mold, which is irrelevant when casting metal in a vacuum containing a minimum amount of dissolved gases.

A device for steel casting, installed between the tundish and the mold, has a vertical channel, at the lower end of which two partitions are placed, in the center between which is a separator. The inner walls of the partitions are made concave and arranged so that they create a converging metal stream from the exit channel (see ed. Mon. RU # 2432226 C2, cl. B22D 41/50, publ. 2007).

A disadvantage of the known device is the inability to control the speed of the casting of the metal, especially in the case of filling metal cast iron mold, when the profitable part of the ingot must be cast at a lower speed.

The basis of the invention is the task of improving the known device for casting steel, installed between tundish and mold.

The proposed device differs from the prototype in that it is installed in the tundish seat and is made in the form of two steel-pouring channels of different lengths, located at different heights relative to the bottom of the grinder and at the same level relative to the upper horizontal plane of the mold, the upper plane of the short casting channel coincides with the bottom of the tundish.

The technical result of the invention is the expansion of the technological capabilities of the process of casting steel and alloys, as well as the possibility of filling the head part of the ingot with a lower speed.

The invention is illustrated by drawings, which depict:

- FIG. 1 - Filling device for pouring metal from the tundish into molds, vertical section;

- FIG. 2 - the appearance of the finished device;

- FIG. 3 is an external view of a device installed in an industrial cowl;

- FIG. 4 - a section of the profitable part, which was poured through the usual steel-teeming cup;

- FIG. 5 - a section of the profitable part on which the metal was poured through the proposed casting device.

A casting device 1 for casting metal from a tundish into molds, containing a tubular body of refractory material, having two steel pouring channels: long 2 and short 3. The casting device is installed in a special place of the tundish 4 so that the upper plane 5 of the short steel casting channel 5 coincides with the plane of the tundish bottom 4. At the initial time of casting, when the level of metal 6 is below the upper horizontal plane 7 of the long channel 2, the expiration of the metal occurs h Through one short channel 3. After raising the metal level in the tundish to a level above the upper horizontal plane 7 of the long channel 2, the metal flows through two channels 2 and 3 at once. To control the casting speed, for example, when filling the profitable part of the ingot, the metal level in the tundish is reduced below the upper horizontal plane 7 of the long channel 2, after which the outflow of the metal occurs only through the short channel 3. To re-increase the speed of the casting, the metal level in the tundish is raised again above th horizontal plane 7 long channel 2.

This casting device passed the pilot testing at PJSC "Ruspolymet". The appearance of the tundish is shown in FIG. 2. The appearance of the device installed in the bucket is shown in FIG. 3. Experimental melts were carried out using this casting device. To assess the effectiveness of the casting device, the profitable parts of one heat were cut along the diameter, and the metal was poured through the proposed casting device, as well as one profitable part, which was poured through a steel cup. The section of the profitable part, which was poured through a conventional steel teeming cup, is shown in FIG. 4, and a section of the profitable part where the metal was poured through the proposed casting device is shown in FIG. 5. As can be seen from the sections of profitable parts, with the use of the proposed filling device, the shrinkage shell ends 100 mm higher than in the case of using a regular cup. Thus, when applying the proposed casting device, it becomes possible to obtain a denser profitable part of the ingot, as well as the possibility of filling the head part of the ingot at a lower speed.

Claims (1)

A casting device for pouring metal from a tundish into molds, containing a tubular body of refractory material, characterized in that it is installed in a tundish seat and made in the form of two steel-casting channels of different lengths located at different heights relative to the tundish bottom and at the same level relative to the upper the horizontal plane of the mold, while the upper plane of the short steel-pouring channel coincides with the plane of the tundish bottom.

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