RU33340U1 - Ladle intermediate for continuous casting of metal - Google Patents

Description

INTERMEDIATE BUCKET FOR CONTINUOUS METAL CASTING

The utility model relates to metallurgy and can be used in continuous casting of metal.

An intermediate ladle for continuous casting is known, comprising a lined body, a zone of metal entry from a steel pouring ladle and pouring glasses, between the zone of metal input and pouring glasses there are baffles made convex, while the bulges are directed towards the metal entry zone, and the partitions are equipped with overflow channels ( see RF patent No. 2038911, CL B22D 11/00, 1995).

The disadvantage of this tundish is the low quality of the cast steel. Indeed, in the intermediate ladle under consideration, the presence of a convex septum directed into the zone of metal entry from the steel ladle facilitates rotation of the metal during casting, the formation of a funnel in the transfer zone centered on the axis of the casting nozzle, and, as a result, the covering slag and non-metallic inclusions are tightened channel of the pouring cup, which reduces the quality of the cast steel.

The closest analogue to the claimed object is an intermediate ladle for continuous casting of metal, including a lined casing, a zone of metal inlet from a steel pouring ladle and pouring glasses, partitions are located between the metal entering zone and pouring glasses, forming a receiving and pouring chambers, with three chambers made in them in rows of narrowing channels; there are their overflow channels, from which the channels of the upper row are directed by narrowing towards the receiving chamber, and the channels of the middle and lower rows are directed by narrowing in thoron filling chambers

MnKB22D 11/10

(see RF patent No. 2185261, B 22 D 41/00).

The disadvantage of this tundish is the low quality of the cast steel. In the intermediate ladle under consideration, the presence of a rectilinear baffle facilitates metal crushing during casting, the formation of a funnel in the transfer zone centered on the axis of the casting cup and, as a result, tightening the cover slag and non-metallic inclusions in the casting cup channel, which reduces the quality of cast steel, in addition, vertical partitions have insufficient strength under the mechanical influence of a metal flow.

The technical problem solved by the utility model is to improve the quality of the metal that arrives; it is casted by reducing the ingress of slag into steel.

The problem is solved in that in an intermediate ladle for continuous casting of metal, including a lined body, a zone of metal inlet from a steel pouring ladle and pouring glasses, partitions are formed between the metal entering zone and pouring glasses, forming reception and casting chambers, with three rows of tapering overflow channels, of which the channels of the upper row are directed by the narrowing towards the receiving chamber, and the channels of the middle and lower rows are directed by the narrowing towards the different According to the utility model, each partition is made in the form of a picloid, the top of each arch of the cycloid is turned towards the receiving chamber, and the starting points are towards the casting chamber.

The utility model is illustrated by drawings, where:

figure 1 shows a part of a longitudinal section of an intermediate bucket;

figure 2 is a section aa in figure 1;

in Fig.Z - section bB in Fig.2.

As an option, an intermediate ladle for continuous casting of metal is presented, which contains a lined body 1 (FIG. 1), zone 2, metal flows from the steel pouring ladle and pouring glasses 3 and 4 (FIG. 2), between the metal entering zone 2 and the pouring glasses 3 and 4, partitions 5 and 6 are located, which form the receiving chamber 7 and the casting chambers 8 and 9, with three rows of tapering overflow channels made in them, of which the channels of the upper row 10 are narrowed towards the receiving chamber 7, and the channels of the middle 11 (Fig. H) and lower 1 2 rows are directed by narrowing towards the casting chambers 8 and 9 (Fig. 2), each of the partitions 5 and 6 is made in the form of a cycloid, the vertices of the arches of the cycloid are facing the receiving chamber 7, and the starting points 13 are directed towards the casting chambers 8 and 9 while the overflow channels of the middle 11 (Fig. 3) and the lower 12 rows are made at the vertices of the arches of the cycloid of each partition, and the overflow channels 10 of the upper row are made at the starting points 13 and their longitudinal axes are perpendicular to the vertical axes of the Zi4 pouring glasses. An intermediate ladle for continuous casting of metal works as follows. The metal from the steel pouring ladle enters the intermediate ladle, when moving along it, the metal moves from the receiving chamber 7 to the casting chambers 8 and 9, passing through the overflow channels 11,12,13 of the partitions 5 and 6. Through the casting glasses 3 and 4, the steel enters the mold . In the casting chambers 8 and 9, two types of hydrodynamic processes occur. The first is the movement of steel from the receiving chamber 7 through the overflow channels of the partitions 5 and 6. The second is the outflow of steel from the casting cups 3 and 4, which is simultaneously accompanied by the rotational movement of the metal in the casting chambers 8 and 9. Steel flows from the lower 12 row of the overflow channels move into the casting chambers 8 and 9 with continuous inclined jets above the pouring glasses 3 and 4, forming a hydrodynamic plane, which serves as a barrier to non-metallic inclusions getting into the zone lying above the glasses 3 and 4. At the same time, due to the action of inclined jets of steel from channels

The middle of the 11th row, creates directed convection, which contributes to the removal of non-metallic inclusions in the slag zone. The channels 10 of the upper row form converging steel flows directed towards the axes of the casting cups 3 and 4, protect the metal from the formation of funnels on the surface in the casting chambers 8 and 9 and reduce the retraction of the coating slag in the cups 3 and 4. Rotational movement of the metal in the casting chambers, in the presence of partitions made in the form of a cycloid, it is accompanied by the interaction of metal flows with the surfaces of the arches in the casting chambers and the subsequent direction of the steel flows in the direction of the casting glasses 3 and 4, which ensures t reducing the height of the funnel above the pouring glass and reduces the possibility of pulling the cover slag into the metal. Thus, the control of the movement of steel flows through overflow channels, as well as the regulation of the rotational movement of steel in the casting chambers, provides an increase in the quality of the metal entering the casting, reducing the ingress of slag into the casting glasses.

Claims (1)

An intermediate ladle for continuous casting of metal, including a lined body, a zone of metal inlet from a steel pouring ladle and pouring glasses, partitions are located between the metal inlet and pouring glasses, which form a receiving and pouring chambers, with three rows of narrowing overflow channels made of them, from which channels the upper row is directed by narrowing towards the receiving chamber, and the channels of the middle and lower rows are directed by narrowing towards the casting chambers, characterized in that each I the partition is made in the form of a cycloid, the top of each arch of the cycloid is facing the receiving chamber, and the starting points are towards the casting chamber.