RU2778649C1 - Metering nozzle for continuous metal casting on machines for continuous casting of workpieces with a closed jet - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention relates to continuous casting. Metering nozzle for continuous metal casting on machines for continuous casting of workpieces with a closed jet consists of an upper and a lower parts with a metal supply channel along the axis and comprises a receiving funnel in the top. The receiving funnel is shaped as a truncated cone with an arc-shaped side surface. The arc-shaped working surface of the funnel is therein formed by roundings along the main (R₁) and additional (R₂) radii and by the conjugation thereof, wherein R₂=R₁·K, where K is a constant coefficient equal to at least 1.05. The diameter D of the circumference of adjoining of the working surfaces of the head part of the stopper to the working surface of the funnel is selected larger, smaller, or matching the diameter S of the circumference of conjugation of said roundings. The working surface is also made in the form of multiple conjugated truncated cones or multiple truncated cones conjugated with multiple arc-shaped surfaces, allowing for unification of the standard size of the metering nozzle for several cross-section shapes of the cast workpieces into a single standard size.

EFFECT: reduction in the level of freezing of metal in the channel of the metering nozzle at the beginning of casting.

9 cl, 4 dwg

Description

The invention relates to the field of metallurgy, in particular to steelmaking, and can be used in the continuous casting of steel with a closed jet.

A well-known design of dosing cups [1] with an inner channel diameter of 35 mm brand DSA-TN-B / TN60 (Supplementary agreement No. 19 to contract No. DGNТЗТ000111 of 01.02.2006) and 45 mm brand DSA-SENBDY705 [2] (Technical project No. NTMK-TNN-2034 dated October 10, 2019), in which the working surface of the receiving funnels of the dosing cups in cross section has one rounding radius.

The disadvantage of these designs is the lack of ensuring the necessary adjacency of the monoblock stopper to the dosing cup when pouring metal on formats that are narrow in cross section, resulting in an increased risk of uncontrolled metal leakage - non-covering, leading to the need to freeze and stop pouring steel into the mold of a particular stream, and when pouring small formats, there are cases of metal freezing in the channel of the metal wiring when starting the continuous casting machine or after replacing the tundish using the melt-for-melt casting method.

The closest in terms of technical solution and achieved results is the intake funnel of the submersible nozzle [3] (RF patent No. 23809 “Intake funnel of the submersible cup”, OAO Nizhny Tagil Iron and Steel Works, IPC B22D11 / 00, publ. 20.07.2002, bull. No. 20 ) made in the form of a cone, while the internal docking receiving funnel is made combined, and the upper part has the shape of a cone, and the lower part is a sphere, which smoothly passes tangentially to the generatrix of the conical part of the receiving funnel.

The disadvantage of the known receiving funnel is one radius of curvature in cross section. With this design of the dosing cup, at the beginning or in the process of pouring metal by the continuous “melt-for-melt” method, a loose fit of the stopper-monoblock head to the receiving funnel of the dosing cup may occur, which can cause uncontrolled leakage of metal - non-covering, which leads to long emergency downtime machines for continuous casting of steel billets.

The technical result of the present invention is to reduce the risk of metal freezing in the nozzle nozzle channel at the beginning of metal pouring through the tundish; unification of the design of two or more standard sizes of dosing nozzles used in pouring metal for several cross-sectional formats of billets of steel continuous casting machines into one standard size, reducing cases of non-covering of the coupling of the dosing cup and monoblock stopper.

The specified technical result is achieved by the fact that in the cup-dispenser, consisting of the upper and lower parts, having a receiving funnel in the upper part, made in the form of a truncated cone with a metal supply channel along the axis, the following differences are provided: the side surface of the receiving funnel in the cross section has an arcuate the shape formed by the conjugation of the main radius R ₁ and the additional radius R ₂ from the side of the lower part of the dispenser cup, which are calculated by the formula:

R ₂ \u003d R ₁ ⋅ K (1),

where:

R ₁ - the main radius of the side surface of the receiving funnel 3 (mm);

R ₂ - additional radius of the side surface of the receiving funnel 3 (mm);

K is a constant coefficient equal to at least 1.05,

provided that the diameter of the circle D adjoining the working surfaces of the head part 6 of the stopper of the monoblock 5 corresponded to the diameter S of the circumference of the annular mating of the main radius R ₁ with the additional radius R ₂ .

In addition, in the proposed cup-dispenser, the upper and lower parts are made of refractory materials, and periclase-carbon material is used as a refractory material in the upper part, and corundum-graphite material is used in the lower part.

In addition, the diameter of the circle D adjoining the working surfaces of the head part of the monoblock stopper is greater than the diameter S of the circumference of the annular mate of the main radius R_one with additional pairing R₂, as well as the diameter of the circle D adjoining the working surfaces of the head part of the monoblock stopper is less than the diameter S of the circumference of the annular interface of the main radius R_onewith additional pairing R₂.

In addition, the side surface of the receiving funnel of the dosing cup in cross section has an arcuate shape with a radius R_one, emanating from the inner edge of the end surface of the upper part into an annular conjugation with a diameter S and the subsequent set of radii R_n, forming a set of subsequent mates with a diameter Sn, while the last radius is connected to the inner channel, and the number of ring mates Sn does not exceed 100, and the depth h_oneadjoining the head part of the monoblock stopper to the working surface of the receiving funnel of the upper part of the dosing cup is less than the depth value h₂adjoining the head part of the monoblock stopper to the working surface of the receiving funnel of the upper part of the dosing cup and the depth value h_nadjoining the head part of the monoblock stopper to the working surface of the receiving funnel of the upper part of the dosing cup.

In addition, the lateral surface of the truncated cone of the working surface of the receiving funnel of the upper part of the dispenser cup is made in the form of a plurality of truncated cones, the lateral surfaces of which have flat conical shapes with a main deflection angle a_one from the end surface of the upper part of the dispenser cup, additional deviation angle a₂, sets of additional deflection angles a_n,located in such a way that they gradually form circular conjugations S_, S_n, and the number of ring mates does not exceed 100.

In addition, the side surface of the truncated cone of the working surface of the receiving funnel of the upper part of the dispenser cup is made in the form of _a set of _truncated cones, the side surfaces of which have flat conical shapes with angles of deviation from the end surface of the top part of the dispenser cup surfaces in the form of an arcuate shape with a plurality of radii R _n arranged in such a way that they gradually form ring mates S _n , and the number of ring mates of flat conical and arcuate shapes placed in any sequence does not exceed 100.

And also the inner channel of the upper part of the dispenser cup is radially expanded relative to the region of the lower end of the lower part of the dispenser cup, and its diameter is calculated by the formula:

d _in \u003d d _n ⋅ k (2),

where:

d _{in -} the diameter of the inner channel of the dispenser cup in the upper part 1 (mm);

d _{n -} the diameter of the inner channel of the lower end of the lower part of the 2 Cup dispenser (mm);

k is a constant coefficient equal to 1.01÷1.30.

The essence of the invention is illustrated by drawings, which show:

Fig. 1 - General scheme of the dispenser cup (section);

Fig. 2 - Receiving funnel of the dosing cup with two rounding radii (section);

Fig. 3 - Receiving funnel of the glass dispenser with multiple rounding radii (section);

Fig. 4 - Receiving funnel of the glass dispenser with many side surfaces of truncated cones of a flat conical shape (section).

Description of reference position numbers:

1 - the upper part of the glass dispenser;

2 - the lower part of the glass dispenser;

3 - receiving funnel;

4 - internal channel;

5 - monoblock stopper;

6 - head part of the monoblock stopper;

7 - end surface of the glass dispenser;

8 - inner edge of the end surface.

D is the diameter of the circumference of the adjoining working surfaces of the head part of the stopper-monoblock 5 to the receiving funnel 3 of the dispenser cup;

R ₁ - the main radius of the side surface of the receiving funnel 3 arc-shaped;

R ₂ - additional radius of the side surface of the receiving funnel 3 arc-shaped;

R _n - set of radii of the side surface of the receiving funnel 3, made in the form of an arcuate or flat conical shape;

K is a constant coefficient equal to at least 1.05;

S is the diameter of the circumference of the annular interface of the main radius R ₁ with additional R ₂ in the case of using the working surface of the receiving funnel 3 arc-shaped and flat conical surfaces formed at the main angle a ₁ and auxiliary a _n ;

S _n is the diameter of the circumference of the annular mate of the main radius R ₁ with many additional R _n in the case of using the working surface of the receiving funnel 3 arc-shaped and flat conical surfaces formed at the main angle a ₁ and many auxiliary a _n ;

h ₁ - adjoining depths of the head part 6 of the stopper-monoblock 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dispenser cup (item 4);

h ₂ - adjoining depths of the head part 6 of the stopper-monoblock 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dispenser cup (item 4);

h _n - adjoining depths of the head part 6 of the stopper-monoblock 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dispenser cup (item 4);

a ₁ - the main angle formed between the end surface of the upper part and the side surface of the truncated cone of a flat conical shape of the receiving funnel;

a ₁ - additional angle formed between the end surface of the upper part and the side surface of the truncated cone of a flat conical shape of the receiving funnel;

a _n - many additional angles formed between the end surface 7 of the upper part 1 and the side surfaces of the truncated cone of a flat conical shape of the receiving funnel 3;

d _in - the diameter of the inner channel 4 of the dispenser cup in the upper part1;

d _n - the diameter of the inner channel 4 of the lower end of the lower part 2 cup dispenser;

k is a constant coefficient equal to 1.01÷1.30.

The dosing cup is made as a one-piece product, consisting of the upper 1 and lower parts 2, in its upper part it is tightly docked with a stopper-monoblock 5, having a head part 6, the lower base of which has a spherical shape.

The execution of the upper 1 and lower part 2 of the dosing cup from refractory material (periclase-carbon material is used as a refractory material in the upper part 1, corundum-graphite material is used in the lower part 2), and the head part 6 is made of periclase-carbon refractory materials, allows to withstand high temperatures when pouring metal from a tundish - more than 1450°C.

The cup-dispenser is made of a one-piece product, while the upper 1 and lower parts 2 are connected in such a way that they have a common internal channel 4 along the axis. 8, which plays the role of forming liquid metal flows from the tundish of a continuous casting machine into the inner channel 4 of the dosing nozzle with a diameter d _{in the} upper part 1 and d _n of the lower end of the lower part of the dosing cup 2 (Fig. 1).

The working surface of the receiving funnel 3 of the dosing cup is in contact with the head part 6 of the stopper-monoblock 5 and liquid metal and is a truncated cone, the side surface of which has an arcuate shape with a main radius R_oneemanating from the inner edge 8 of the end surface 7 of the upper part of the cup-dispenser 1 into an annular interface with a diameter S and an additional radius R_2,coming from the annular interface with the surface of the inner channel 4 of the upper part 1 with a diameter d_inprovided that the diameter D of the annular the abutment of the working surfaces of the stopper of the monoblock 5 and the cup of the dispenser corresponds to the diameter S of the annular interface of the main R_oneand additional R₂radii of the arcuate shape of the surface of the receiving funnel 3 (Fig. 2, Fig. 2.1, Fig. 2.2, Fig. 3).

The presence of two rounding radii R ₁ and R ₂ on the working surface of the receiving funnel 3 of the dispenser cup ensures a tight fit of the head part 6 of the stopper of the monoblock 5 to the top of the cup 1 of the dispenser when pouring liquid metal.

In the process of developing a dosing nozzle for continuous casting of metal on continuous casting machines with a closed jet, the optimal ratio of the dimensions of the additional radius R₂depending on the main radius R_oneon top of 1 cup dispenser.

In particular, the studies carried out allow us to state that in order to reduce the risk of metal freezing in the inner channel 4 of the dosing nozzle at the beginning of pouring metal through the tundish, an additional radius R₂side surface of the receiving funnel 3 is calculated by formula (1):

R ₂ \u003d R ₁ ⋅ K (1)

The data are based on the results of a number of tests carried out in the converter shop of EVRAZ NTMK JSC. During the tests it was found that:

- additional radius R _{2 of} the side surface of the receiving funnel 3 is less than 1.05 R _{1 of} the main radius of the side surface of the receiving funnel 3, leads to a loose connection between the receiving funnel of the dosing cup 3 and the head of the monoblock stopper 6, in connection with this, there are cases of metal leakage and uncovered.

- additional radius R _{2 of} the side surface of the intake funnel 3 is more than 1.05 R _{1 of} the main radius of the side surface of the intake funnel 3, leads to a tighter pairing of the intake funnel of the cup-dispenser 3 and the head of the stopper - monoblock 6, in this regard, cases of leakage are excluded metal and non-coverings, in addition, the risks of emergencies and their consequences are reduced.

On FIG. 2.1 and Fig. 2.2 shows various options for performing a receiving funnel 3 with two rounding radii, for example, (Fig. 2.1), if the diameter of the circle D adjoining the working surfaces of the head part 6 of the stopper of the monoblock 5 is greater than the diameter S of the circle of the annular mate of the main radius R ₁ with an additional radius R ₂ ( D>S) and, for example, (Fig. 2.2), if the diameter of the circle D adjoining the working surfaces of the head part 6 of the stopper of the monoblock 5 is less than the diameter S of the circumference of the annular mate of the main radius R ₁ with an additional radius R ₂ (D<S).

It is possible to perform the side surface of the receiving funnel 3 of the dispenser cup, which has an arcuate shape in cross section with a radius R ₁ emanating from the inner edge 8 of the end surface of the upper part 1 into an annular mate with a diameter S and a subsequent set of radii R _n (Fig. 3) _, forming a set of subsequent mates with a diameter Sn, while the last radius is connected to the channel, and the number of circular mates Sn does not exceed 100, because with an increase in the values of the ring interfaces over 100, it causes difficulty in manufacturing the upper part of the nozzle 1, which is made of a refractory product in the form of a periclase-carbon material, preparing equipment for the production of refractory products, checking the geometric dimensions of refractory products during the manufacturer's output control and the consumer's input control.

There are various options for the implementation of the value of the depth h_oneadjunction of the head part 6 of the monoblock stopper 5 to the working surface of the receiving funnel 3 of the upper part of the 1 dosing cup and the depth h₂adjoining the head part 6 of the monoblock stopper 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dosing cup 3 and the depth h_nadjoining the head part 6 of the stopper-monoblock 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dosing cup relative to the end surface 7 of the upper part of the 1 dosing cup.

On FIG. 1 depth h_oneadjunction of the head part 6 of the monoblock stopper 5 to the working surface of the receiving funnel 3 of the upper part of the 1 dosing cup is less than the depth value h₂(Fig. 2) adjoining the head part 6 of the monoblock stopper 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dosing cup 3.

On FIG. 3 the value of the depth h _n adjoining the head part 6 of the stopper-monoblock 5 to the working surface of the receiving funnel 3 of the upper part 1 of the dispenser cup.

On FIG. 4 shows various options for performing the receiving funnel 3 of the upper part 1 of the dispenser cup with a plurality of side surfaces of truncated cones of a flat conical shape:

- with the main deviation angle a ₁ from the end surface of the upper part 1 of the dispenser cup;

- with an additional deviation angle a ₂ from the end surface of the upper part 1 of the dispenser cup;

- sets of additional deflection angles a _n , located in such a way that they gradually form ring mates S _, S _n , and the number of ring mates does not exceed 100, because with an increase in the values of the annular interfaces more than 100, it causes difficulty in manufacturing the upper part of the nozzle 1, which is made of a refractory product in the form of a periclase-carbon material, preparing equipment for the production of refractory products, checking the geometric dimensions of refractory products during the output control of the manufacturer and the input control of the consumer; in this case, the maximum deviation angle a ₁ , a ₂ or a _n will be at least 0.1 °, because checking for compliance with values of this value less than 0.1 ° of the refractory product will be problematic, and not more than 180 °, because there is a lack of expediency in the manufacture of this design of a refractory product.

On FIG. 4 shows various options for performing the side surface of the truncated cone of the working surface of the receiving funnel 3 of the upper part 1 of the dosing cup:

- in the form of a plurality of truncated cones, the side surfaces of which have flat conical shapes with deviation angles a ₁ and a ₂ from the end surface of the upper part 1 of the dispenser cup;

- sets of additional angles a _n conjugated with the side surfaces in the form of an arcuate shape;

- with a plurality of radii R _n (Fig. 1), located in such a way that they gradually form ring mates S _n , and the number of ring mates of flat conical and arcuate shapes placed in any sequence does not exceed 100,

because with an increase in the values of the annular interfaces more than 100, it causes difficulty in manufacturing the upper part of the nozzle 1, which is made of a refractory product in the form of a periclase-carbon material, preparing equipment for the production of refractory products, checking the geometric dimensions of refractory products during the output control of the manufacturer and the input control of the consumer; in this case, the maximum deviation angle a ₁ , a ₂ or a _n will be at least 0.1 °, because checking for compliance with values of this value less than 0.1 ° of the refractory product will be problematic, and not more than 180 °, because there is a lack of expediency in the manufacture of this design of a refractory product.

Preferably, the execution of the inner channel 4 of the upper part 1 of the cup-dispenser is radially expanded relative to the area of the lower end of the lower part 2 of the cup of the dispenser and is calculated by the formula (2):

d _in = d _n ⋅ k (2)

These dependencies are based on the results of tests conducted in the converter shop of EVRAZ NTMK JSC. During the tests it was found that:

- the value d _{in the} diameter of the inner channel of the dispenser cup in the upper part 1 is less than 1.01d _n , leads to a differently oriented flow of metal from the inner channel of the dispenser nozzle into the internal channel of the submersible nozzle with the possibility of blurring the inner surface of the latter with a violation of the quality of the continuously cast billet, creating an emergency situation, for example, burnout of the submersible nozzle, metal leakage in the interface between the dosing nozzle and the submersible nozzle;

- the value of d _{in the} diameter of the inner channel of the dispenser cup in the upper part 1 is more than 1.30d _n , because this ratio, formed by such a design of the internal channel, does not seem appropriate in its application.

The dosing cup for continuous casting of metal on continuous casting machines with a closed jet works as follows.

The dosing cup is installed in the bottom of the tundish. The poured liquid metal from the tundish through the combined channels of the dosing cup and the submersible cup, with the help of a receiving funnel 3, enters the mold, where it solidifies, and is drawn out in the form of a billet. Dosing of metal from the tundish is carried out with the help of a vertically moving monoblock stop 5 with a head part 6. The monoblock stop 5 and the dosing cup form a refractory metal conduit channel. Stopping the supply of metal through the internal channel 4 of the metal wiring is achieved by tightly adjoining the working surface of the head part 6 of the monoblock stopper 5 to the receiving funnel 3 of the dosing cup 3 around a circle with a diameter D to a depth h _{1 of} the lower point of the head part 6 of the monoblock stopper 5 relative to the surface of the end face 7 of the upper part 1 dispenser glass.

Execution of the working surface of the receiving funnel 3 of the upper part 1 of the dispenser cup in the form of a truncated cone, the side surface of which has an arcuate shape with a main radius R_one,emanating from the inner edge 8 of the end surface 7 of the upper part 1 of the dispenser glass into the annular interface S and an additional radius R₂(Fig. 2), coming from the annular interface with the surface of the inner channel 4 of the upper part 1 with a diameter d_in,provided that the diameter D of the annular junction of the working surfaces of the monoblock stopper is 5 and the top of 1 dispenser cup corresponds to the diameter of the annular conjugation of the main R_oneand additional R₂radii of the arcuate shape of the surface of the receiving 3 funnel S, reduces the risk of freezing of the metal in the internal channel 4 of the cup-dispenser at the beginning of pouring the metal through the tundish.

The use of the invention makes it possible to: reduce the accident rate of the process of continuous casting of steel into blanks by the "melt-for-melt" method in terms of reducing uncontrolled metal smudges (non-covers), leading to the need to freeze and stop casting steel into a mold of a particular stream, reduce the cases of metal freezing in the metal conduit channel during starting the continuous casting machine or after replacing the tundish, increase metal production, reduce the loss of metal charge and the number of several sizes of dosing nozzles used in pouring metal for several cross-sectional formats, including standard sizes of submersible nozzles.

The advantage of the proposed dosing cup is to ensure a stable supply of liquid metal to the CCM mold and long-term operation of the dosing cup without replacing it.

To date, an experimental batch of dosing cups from 12 experimental refractory products has been tested, and the following results have been obtained:

- absence of coverings during continuous casting of steel;

- wear of the channel of experimental products comparable with serially used dosing cups;

- no remarks when pouring metal on continuously cast bloom billets of different cross-sections.

Thus, the claimed technical solution fully fulfills the technical result.

The analysis of the prior art, including the search for patents and scientific and technical information and the identification of sources containing information about the analogues of the claimed technical solution, made it possible to establish that the applicant did not find sources characterized by features identical to all essential features of the claimed invention.

Therefore, the claimed invention meets the criteria of "novelty" and "inventive step".

Sources of information

[1] Additional agreement No. 19 to contract No. DGNТЗТ000111 dated February 1, 2006;

[2] Technical project No. NTMK-TNN-2034 dated 10.10.2019;

[3] RF patent No. 23809 "Inlet funnel of the submersible nozzle", OAO "Nizhniy Tagil Iron and Steel Works", IPC B22D11/00, publ. 20.07.2002, bul. No. 20.

Claims (28)

1. A dosing cup for continuous casting of metal on continuous casting machines with a closed jet, consisting of upper and lower parts with a metal supply channel along the axis and containing a receiving funnel in the upper part, characterized in that the receiving funnel is made in the form of a truncated cone with an arcuate side surface, and the working surface of the receiving funnel in the section has an arcuate shape formed by rounding along the main radius R ₁ , rounding along the additional radius R ₂ located from the side of the lower part of the dispenser cup, and their conjugation, with the following ratio of rounding radii: R ₂ \u003d R ₁ ⋅K, where R ₁ - the main radius of curvature of the working surface of the receiving funnel, mm; R ₂ - additional rounding radius of the working surface of the receiving funnel, mm; K is a constant coefficient equal to at least 1.05, wherein the diameter D of the circumference of the junction of the working surfaces of the head part of the monoblock stopper to the working surface of the receiving funnel corresponds to the diameter S of the circle of conjugation of the rounding along the main radius R ₁ with the rounding along the additional radius R ₂ . 2. The dispenser cup according to claim 1, characterized in that the upper and lower parts of the dispenser cup are made of refractory materials. 3. The dosing cup according to claim 1, characterized in that the upper part of the dosing cup is made of periclase-carbon refractory material, and its lower part is made of corundum-graphite refractory material. 4. The dosing cup according to claim 1, characterized in that the working surface of the receiving funnel of the dosing cup in the section has an arcuate shape with a rounding along the main radius R ₁ emanating from the inner edge of the end surface of the upper part of the dosing cup, to the conjugation along the circumference with a diameter S with a rounding along the additional radius R ₂ and up to the next set of roundings along the radii R _n , forming a set of subsequent pairings along circles with a diameter S _n , while the last rounding is connected to the metal supply channel, and the number of pairings along circles with a diameter S _n does not exceed 100 . 5. The dispenser cup according to claim 1, characterized in that the metal supply channel is made expanding from the lower end of the lower part of the dispenser cup to the top of the dispenser cup, and its diameter is: d _in =d _n ⋅k, where d _in is the diameter of the metal supply channel in the upper part of the dosing cup, mm; d _n is the diameter of the metal supply channel at the lower end of the lower part of the dispenser cup, mm; k is a constant coefficient equal to 1.01-1.30. 6. Dosing cup for continuous casting of metal on continuous casting machines with a closed jet, consisting of upper and lower parts with a metal supply channel along the axis and containing a receiving funnel in the upper part, characterized in that the receiving funnel is made in the form of a truncated cone with an arcuate side surface, and the working surface of the receiving funnel in the section has an arcuate shape formed by rounding along the main radius R ₁ , rounding along the additional radius R ₂ located from the side of the lower part of the dispenser cup, and their conjugation, with the following ratio of rounding radii: R ₂ \u003d R ₁ ⋅K, where R ₁ - the main radius of curvature of the working surface of the receiving funnel, mm; R ₂ - additional rounding radius of the working surface of the receiving funnel, mm; K is a constant coefficient equal to at least 1.05, wherein the diameter D of the circumference of the adjunction of the working surfaces of the head part of the monoblock stopper to the working surface of the receiving funnel is greater than the diameter S of the circle of conjugation of rounding along the main radius R ₁ with rounding along the additional radius R ₂ . 7. A dosing cup for continuous casting of metal on continuous casting machines with a closed jet, consisting of upper and lower parts with a metal supply channel along the axis and containing a receiving funnel in the upper part, characterized in that the receiving funnel is made in the form of a truncated cone with an arcuate side surface, and the working surface of the receiving funnel in the section has an arcuate shape formed by rounding along the main radius R ₁ , rounding along the additional radius R ₂ located from the side of the lower part of the dispenser cup, and their conjugation, with the following ratio of rounding radii: R ₂ \u003d R ₁ ⋅K, where R ₁ - the main radius of curvature of the working surface of the receiving funnel, mm; R ₂ - additional rounding radius of the working surface of the receiving funnel, mm; K is a constant coefficient equal to at least 1.05, the diameter D of the circumference adjoining the working surfaces of the head part of the stopper of the monoblock to the working surface of the receiving funnel is less than the diameter S of the circumference of the conjugation of the rounding along the main radius R ₁ with the rounding along the additional radius R ₂ . 8. A dosing cup for continuous casting of metal on continuous casting machines with a closed jet, consisting of upper and lower parts with a metal supply channel along the axis and containing a receiving funnel in the upper part, characterized in that the working surface of the receiving funnel is made in the form of a plurality of conjugated truncated cones and in the section has a flat conical shape, while the side surfaces of the mentioned truncated cones are made at the main angle of deviation a ₁ from the end surface of the upper part of the dispenser cup, at an additional angle of deviation a ₂ from the end surface of the upper part of the dispenser cup and under a lot of additional deviation angles a _n , located with the formation of conjugations along circles with diameters S ... S _n , and the number of these conjugations does not exceed 100. 9. A dosing cup for continuous casting of metal on continuous casting machines with a closed jet, consisting of upper and lower parts with a metal supply channel along the axis and containing a receiving funnel in the upper part, characterized in that the working surface of the receiving funnel in the section is made in the form of a set truncated cones conjugated with a plurality of arc-shaped surfaces having roundings along the radii R _n , moreover, the side surfaces of the said truncated cones in the section are made at the main deviation angle a ₁ from the end surface of the upper part of the dispenser cup and a plurality of additional deviation angles a _n , while the number of conjugates formed along circles with diameters S…S _n of conical and arcuate parts placed in any sequence does not exceed 100.

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