SU466948A1 - Device for installing the pouring cup - Google Patents

Description

one

The invention relates to the field of foundry and can be used primarily in continuous casting plants.

A device for a metal bucket is known, in the bottom of which an insert is placed in a nested brick, in which a pouring cup is installed. The insert has vertical protrusions that form radial channels of rectangular shape for guiding the jet of metal.

The disadvantage of such a device is that the rectangular projections are unstable to shear and destruction by the liquid metal in the initial period is filled with a ladle. In addition, it is known that the quality of the ingot is greatly influenced by the nature of the flowing jet of molten metal, its shape and the consistency of metal consumption, and to obtain a compact jet with a longer solid length and to ensure consistency of consumption, it is necessary to maintain the level of the metal in the ladle and above a certain defined level, equal to 250-300 mm, which is difficult in the practice of casting. Otherwise, in the area of the pouring cup, a vortex flow of the molten metal occurs, leading to a change in the shape of the outgoing jet, an increase in the area of contact between the jet and the atmosphere and a decrease in the rate of metal outflow. As a result of the research

it was found that the stable character and compactness of the jet are ensured only at an optimum ratio of the height of the projections and the diameter of the inlet of the pouring cup.

In the proposed device, the vertical protrusions of the insert are trapezoidal with rounded corners, the protrusions being from 0.3 to 1.0 times the diameter of the inlet of the pouring cup. Such a construction of the protrusions makes it possible to reduce the destruction of the protrusions by the molten metal during the filling of the ladle, to obtain a compact jet and to improve the quality of the ingot.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 - insert, plan view; in fig. 3 - profile of the radial guide channel of the insert. Filling Cup 1 is set to

insert slot 2, provided with vertical protrusions forming radial guiding channels 3 of trapezoidal cross-sectional shape. The saddle of the cup inlet is blocked by a stopper 4. The insert 2 in turn. 3 is installed in the nested brick 5 of the lined bucket 6. When metal is cast, the stopper plug 4 is lifted by the stopper mechanism above the saddle of the inlet of the pouring cup 1, ensuring the flow of metal into the pouring cup. The bottom metal layer along the radial guide channels 3 is organized. Aspires into the inlet aperture of the pouring cup 1. Due to the presence of friction forces on the bottom layer and vertical protrusions, the overlying metal layers enter the glass inlet without forming a vortex motion, which reduces the turbulence of the outgoing jets , improves its organization. Stru becomes. .; compact with a longer length of solid section, thereby reducing the area of contact with the atmosphere, and hence the secondary oxidation of metal466 5. 10 15 20 .., .. la. By preventing the formation of a vortex funnel, insert 2 with radial guide channels 3, in addition, reduces the amount of slag inclusions in the outgoing stream. ::. . Prod.M.et and goiter e ni. A device for placing the pouring cup in the bottom of the ladle, containing an insert with vertical protrusions forming radial channels, characterized in that, in order to reduce the destruction of the protrusions by the molten metal when filling the bucket, to obtain a compact jet and to improve the quality of the ingot, the protrusions of the insert are trapezoidal with skrugleynymi angles, the height of the protrusions being 0.3--1.0 of the diameter of the inlet opening of the pouring cup.