KR20180058637A - Gate of distribution for ingot molding - Google Patents

Abstract

According to one embodiment of the present invention, provided is a distribution gate for ingot casting, receiving molten metal from tundish to distribute the same to an ingot case. Moreover, the distribution gate for ingot casting has an outlet diameter gradually getting wider as getting away from the position in which the molten metal is supplied from the tundish so that a volume of molten metal injected into the ingot case can be maintained even when fluidity of the molten metal is reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a distribution gate for ingot casting,

The present invention relates to a distribution gate for ingot casting. More particularly, the present invention relates to a distribution gate for an ingot casting which controls the molten metal supplied from the tundish nozzle to be effectively distributed to the ingot case installed at the lower end of the distribution gate.

Regarding the conventional distribution gate, Korean Patent Registration No. 10-0530102 discloses an injection hole having a predetermined gap and size according to the number of installed ingot cases. However, since the retention time of the molten metal was not taken into consideration according to the position of the tundish nozzle when receiving the molten metal from the tundish, it became a factor that causes a deviation in mechanical characteristics of the solidified ingot product after the injection.

In addition, since the distribution gate has a flat bottom shape with no inclination, the residence time is long, and the molten metal which has lost fluidity is left on the floor as it is, causing solidification and scrap generation. Especially, since the rate of loss of fluidity is accelerated according to the viscosity of the alloy melt, the above causes are disadvantageous.

Accordingly, there is a need to develop a distribution gate technology capable of eliminating the disadvantages of the above-described conventional techniques and reducing scrap generation.

Korea Patent No. 10-0530102

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide a tundish system for a tundish, And it is an object of the present invention to provide a distribution gate for ink casting which controls the flow of molten metal and the flow rate.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a distribution gate for casting an ingot.

A distribution gate for ingot casting which receives molten metal from a tundish and distributes the molten metal to an ingot case,

The distribution gate for the ingot casting may include a body portion including a molten metal receiving portion therein, an inner bottom surface of the body portion, and a plurality of outlet portions located on the bottom surface.

At this time, the ingot casting distribution gate gradually increases in the diameter of the outlet of the distribution gate as the distance from the position where the molten metal is supplied in the tundish increases.

At this time, as the distance from the position where the molten metal is supplied from the tundish at the tundish increases, the diameter of the outlet of the distribution gate is gradually widened so that the volume of the molten metal injected into the ingot case And keeps it constant.

At this time, the aspect ratio of the distribution gate for casting the ingot is 5 to 7: 4 to 6: 1, and the upper portion is opened.

At this time, the distribution gate for the ingot casting may be a silicon oxide (SiO ₂ ) system, a silicon oxide-aluminum (SiO ₂ -Al ₂ O ₃ ) system, a zirconium oxide (ZrO ₂ ) system, a silicon carbide Al ₂ O ₃₎ type, spinel, chromium oxide (Cr ₂ O ₃₎ based, carbon (C) system, magnesia (MgO) based oxide, magnesium oxide-chromium (MgO-CrO _3-) based or calcium oxide (CaO) Based refractory material.

According to an aspect of the present invention, there is provided a distribution gate for casting an ingot.

A distribution gate for ingot casting which receives molten metal from a tundish and distributes the molten metal to an ingot case,

The distribution gate for casting the ingot includes a body portion including a molten metal receiving portion therein, a plurality of outlet portions located on an inner bottom surface of the body portion of the body portion, a bottom surface of the outlet portion, and a bottom surface of the outlet portion And a connecting portion connecting the outlet pipe and the bottom surface of the outlet portion to the outlet pipe.

At this time, in order to prevent the molten metal from solidifying on the bottom surface of the distribution gate, the connecting gate for the ingot casting is formed as an inclined surface.

In this case, the inclined surface has an inclination angle of 15 ° to 45 ° with respect to the bottom surface.

At this time, the aspect ratio of the distribution gate for casting the ingot is 5 to 7: 4 to 6: 1, and the upper portion is opened.

At this time, the distribution gate for the ingot casting may be formed of a material selected from the group consisting of aluminum oxide (SiO ₂ ), silicon oxide-aluminum (SiO ₂ -Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ), silicon carbide (Al ₂ O ₃ ), spinel, chromium oxide (Cr ₂ O ₃ ), carbon (C), magnesia, magnesium oxide-chromium (MgO-CrO _3- ) ) Based refractory.

According to an embodiment of the present invention, a uniform quality product can be produced by controlling the residence time of the molten metal injected into the ingot case using the distribution gate for casting the ingot.

In addition, the flowability of the molten metal injected into the ingot case is increased, so that scraps are prevented from being generated on the distribution plate.

In addition, it is possible to uniformly control the injection of the molten metal to produce a product of uniform size.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a cross-sectional view schematically showing a distribution gate for casting an ingot in which the diameter of the outlet of the distribution gate is gradually widened as the distance from the position where the melt is supplied in the tundish according to an embodiment of the present invention.
FIG. 2 is a side view schematically showing a distribution gate for an ingot casting in which a slope is formed from a bottom surface to an outlet of a distribution gate according to an embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A distribution gate for casting an ingot according to an embodiment of the present invention will be described.

1 is a cross-sectional view schematically showing a distribution gate for casting an ingot in which the diameter of the outlet of the distribution gate is gradually widened as the distance from the position where the melt is supplied in the tundish according to an embodiment of the present invention.

1, the distribution gate for casting an ingot includes a body 100 including a molten metal reservoir therein, an inner bottom surface 110 of the body 100, and a plurality of 220, and 230, respectively.

At this time, the ingot casting distribution gate gradually increases in the diameter of the outlet of the distribution gate as the distance from the position where the molten metal is supplied in the tundish increases.

At this time, as the distance from the position where the molten metal is supplied from the tundish at the tundish increases, the diameter of the outlet of the distribution gate is gradually widened so that the volume of the molten metal injected into the ingot case And keeps it constant.

For example, the plurality of outlets 210, 220, and 230 may include a first line outlet 210, a second line outlet 220, and a third line outlet 230 in the order from the melt supply position, . ≪ / RTI >

At this time, the plurality of outlets 210, 220, and 230 are arranged in the order of the first line outlet 210, the second line outlet 220, and the third line outlet 230, .

For example, the diameter of the outlet may be increased from 130% to 145% based on the diameter of the outlet which is the closest to the position where the molten metal is supplied from the tundish.

For example, the first line outlet 210 may have an exit diameter ratio of the second line outlet 220: the third line outlet 230 = 100%: 130%: 145% .

In this case, the outlet diameter is in the range of 30 to 50.

When the melt spouted from the tundish is injected into the ingot casting distribution gate device and distributed to the ingot case, the temperature of the molten metal decreases and the viscosity increases as the molten metal moves away from the molten metal injection portion in the distribution gate do.

When the viscosity of the molten metal increases, the outlet of the distribution gate located far away from the molten metal injection portion may be clogged.

As a result, when the outlet of the distribution gate becomes clogged, it becomes difficult to evenly distribute the molten metal, and further, there arises a problem that the yield of ingot formation relative to the molten metal to be charged is lowered.

However, if the outlet of the distribution gate is made wider as the distance from the injection port of the molten metal is increased, even if the viscosity of the molten metal increases, the outlet of the distribution gate close to the molten metal injection unit per unit time, Can be injected into the ingot case.

At this time, the aspect ratio of the distribution gate for casting the ingot is 5 to 7: 4 to 6: 1, and the upper portion is opened.

At this time, the distribution gate for the ingot casting may be a silicon oxide (SiO ₂ ) system, a silicon oxide-aluminum (SiO ₂ -Al ₂ O ₃ ) system, a zirconium oxide (ZrO ₂ ) system, a silicon carbide Al ₂ O ₃₎ type, spinel, chromium oxide (Cr ₂ O ₃₎ based, carbon (C) system, magnesia (MgO) based oxide, magnesium oxide-chromium (MgO-CrO _3-) based or calcium oxide (CaO) Based refractory material.

Experimental Example

In order to evaluate the performance of the ingot casting distribution gate, which is now widening the outlet of the distribution gate as the distance from the position where the molten metal is supplied in the tundish according to an embodiment of the present invention, the ingot is cast experimentally.

First, the sleeve was assembled on the ingot case.

Next, a ceracle and a distribution gate were assembled on the ingot case coupled with the sleeve to prepare a mold.

Then, the mold was charged into an ingot casting machine.

Then, the tundish was preheated and the molten metal was charged.

Then, the molten metal was injected into the ingot case through the distribution gate, and an ingot was produced.

As a result, it was confirmed that when the ingot was cast using a distribution gate having a uniform distribution gate exit size, the ingot yield relative to the molten metal injection was 70%.

In the case where the ingot is cast using the distribution gate for casting the ingot in which the diameter of the outlet of the distribution gate is wider as the distance from the position where the molten metal is supplied in the tundish according to an embodiment of the present invention, 86%.

Accordingly, it can be seen that the yield of the ingot casting is increased when the ingot casting distribution gate according to an embodiment of the present invention is used.

The distribution gate for cast ingot according to an embodiment of the present invention widens the outlet of the distribution gate as the distance from the position where the molten metal is supplied in the tundish is widened so that the molten metal injected into the ingot case It is possible to constantly induce the volume of the gas.

According to an aspect of the present invention, there is provided a distribution gate for casting an ingot.

FIG. 2 is a side view schematically showing a distribution gate for an ingot casting in which a slope is formed from a bottom surface to an outlet of a distribution gate according to an embodiment of the present invention. FIG.

2, the distribution gate for casting the ingot includes a body portion 100 including a molten metal receiving portion 120, an inner bottom surface 110 of the body portion 100, and a distribution gate outlet structure 300 ).

More specifically, the dispensing gate outlet structure 300 includes a plurality of outlets 200 located at an inner bottom surface 110 of the body 100, a bottom surface 201 of the outlet, An outlet pipe 310 connected to the bottom surface 201 and a connecting part 400 connecting the outlet pipe 310 and the bottom surface 201 of the outlet.

At this time, the connecting gate 400 is formed as an inclined surface in order to prevent the molten metal from solidifying on the bottom surface 110 of the distribution gate.

Here, the diameter of the upper part of the outlet for starting the connection part 400 is Ø30 to Ø50.

In this case, the lower diameter of the outlet part through which the connection part 400 ends is Ø23 to Ø35.

When the melt spouted from the tundish is injected into the ingot casting distribution gate device and distributed to the ingot case, the temperature of the molten metal decreases and the viscosity increases as the molten metal moves away from the molten metal injection portion in the distribution gate do.

When the viscosity of the molten metal is increased as described above, there is a possibility that the molten metal solidifies on the bottom surface of the flat distribution gate.

As a result, when the outlet of the distribution gate becomes clogged, it becomes difficult to evenly distribute the molten metal, and further, there arises a problem that the yield of ingot formation relative to the molten metal to be charged is lowered.

However, if an inclined surface is formed from the bottom surface to the outlet of the distribution gate as in the embodiment of the present invention, it is possible to prevent the molten metal from solidifying on the bottom surface of the distribution gate even if the viscosity of the molten metal increases, Thereby increasing the yield of ingot production compared to the charge melt.

In this case, the inclined surface has an inclination angle of 15 ° to 45 ° with respect to the bottom surface.

At this time, the aspect ratio of the distribution gate for casting the ingot is 5 to 7: 4 to 6: 1, and the upper portion is opened.

At this time, the distribution gate for the ingot casting may be a silicon oxide (SiO ₂ ) system, a silicon oxide-aluminum (SiO ₂ -Al ₂ O ₃ ) system, a zirconium oxide (ZrO ₂ ) system, a silicon carbide Al ₂ O ₃₎ type, spinel, chromium oxide (Cr ₂ O ₃₎ based, carbon (C) system, magnesia (MgO) based oxide, magnesium oxide-chromium (MgO-CrO _3-) based or calcium oxide (CaO) Based refractory material.

According to an embodiment of the present invention, the ingot casting distribution gate forms an inclined surface from the bottom surface to the outlet of the distribution gate, thereby preventing the molten metal from solidifying on the bottom surface of the distribution gate even if the viscosity of the molten metal increases, It is possible to increase the ingot production yield relative to the charged molten metal by preventing the remaining molten metal from being left.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100:
110: inner bottom surface of the body portion
120:
200:
201: bottom surface of the outlet
210: first line outlet portion
220: second line outlet portion
230: third line outlet portion
300: distribution gate exit structure
310: Distribution gate outlet pipe
400: Connection

Claims (8)

There is provided a distribution gate for an ingot casting which receives molten metal from a tundish and distributes the molten metal to an ingot case,
A body portion including a molten metal receiving portion therein;
An inner bottom surface of the body portion; And
And a plurality of outlets located on the bottom surface
And the outlet diameter of the outlet portion gradually increases as the distance from the position where the molten metal is supplied in the tundish increases. The method according to claim 1,
And the volume of the molten metal injected into the ingot case is kept constant even if the flow rate of the molten metal is decreased by gradually increasing the diameter of the outlet of the outlet. The method according to claim 1,
Wherein the body of the ingot casting distribution gate has a width-to-length: height ratio of 5 to 7: 4 to 6: 1, and an upper portion is open. The method according to claim 1,
The ingot-casting distribution gate silicon oxide (SiO ₂₎ based, silicon oxide-aluminum (SiO ₂ -Al ₂ O ₃₎ based, zirconium oxide (ZrO ₂₎ based, silicon carbide (SiC) based, aluminum oxide (Al ₂ O ₃₎ type, spinel, chromium oxide (Cr ₂ O ₃₎ based, carbon (C) system, magnesia (MgO) based oxide, magnesium-chromium (MgO-CrO _3-) based or calcium oxide (CaO) based refractory oxide Wherein the at least one of the first and second diffusion layers is made of a metal. There is provided a distribution gate for an ingot casting which receives molten metal from a tundish and distributes the molten metal to an ingot case,
A body portion including a molten metal receiving portion therein;
An inner bottom surface of the body portion;
A plurality of outlets positioned on an inner bottom surface of the body portion;
A bottom surface of the outlet portion;
An outlet pipe connected to a bottom surface of the outlet portion; And
And a connecting portion connecting the bottom surface of the outlet portion and the outlet pipe, wherein the connection portion is formed in an inclined surface to prevent the molten metal from solidifying on the bottom surface of the distribution gate. The method according to claim 1,
Wherein the inclined surface has an inclination angle of 15 to 45 relative to the bottom surface. The method according to claim 1,
Wherein a distribution gate for the ingot casting is formed in a width-to-length: height ratio of 5 to 7: 4 to 6: 1 and an upper portion is opened. The method according to claim 1,
The ingot-casting distribution gate silicon oxide (SiO ₂₎ based, silicon oxide-aluminum (SiO ₂ -Al ₂ O ₃₎ based, zirconium oxide (ZrO ₂₎ based, silicon carbide (SiC) based, aluminum oxide (Al ₂ O ₃₎ type, spinel, chromium oxide (Cr ₂ O ₃₎ based, carbon (C) system, magnesia (MgO) based oxide, magnesium-chromium (MgO-CrO _3-) based or calcium oxide (CaO) based refractory oxide Wherein the at least one of the first and second diffusion layers is made of a metal.

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