KR101515194B1 - Light weight ladle for carrying molten metal - Google Patents

Abstract

According to the present invention, a lightweight ladle to carry a molten metal comprises: a firebrick layer disposed such that a sidewall part may be in contact with a molten metal storage space, and is in contact with molten metal within the molten metal storage space; a castable layer composed of a first castable layer disposed on the outside of a second firebrick layer and the second castable layer disposed outside of the first firebrick layer; a metal layer disposed coaxially with a castable layer on the outside of the castable layer forming a contour of the sidewall part; and an air layer located between the first castable layer and the second castable layer. Therefore, a firebrick layer at low costs and high heat insulation property may be formed; the total weight of the ladle to carry the molten metal may be reduced; and impact from the outside may also effectively be buffered or blocked.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a lightweight ladle for carrying molten metal,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladle for transporting a molten metal used for transporting molten metal over a long period of time, and more particularly to a ladle for transporting a molten metal with improved sidewall structure to enable lighter weight.

In a die casting company that mass-produces metal products using a die casting facility, the metal material that becomes the material of the metal products is supplied from an external material supplier.

As an example of a method of supplying the metal material to a die casting supplier from a material supplier, there is a method in which a refined or regenerated metal is melted and the melted metal is poured into a molding die to form an ingot, There is a way to supply to the company. In this case, the die casting company produces molten metal by re-melting the ingot supplied from the material supplier and injecting the molten metal into the die casting mold to produce the metal product. However, the method of supplying the molten metal material to the die casting maker by making the molten metal material from the material supplier first requires a lot of manpower, equipment and cost in the process of making the molten metal material into the ingot again, There is a disadvantage in that the delivery time of the metal material is prolonged. In addition, from the viewpoint of the die casting company, the ingot supplied from the material supplier must be melted so as to be injected into the die casting mold, so that not only a lot of cost, time and equipment are required for melting the ingot, There is a disadvantage that a considerable amount of material may be lost due to oxidation of the metal material.

In view of the above points, in recent years, a method of supplying molten metal in a molten state to a die casting company without melting the metal in the material supplier and making it an ingot is often used. As described above, in order to supply the metal material from the material supplier to the die casting maker in a molten state, molten metal transport lanes are used which are capable of accommodating the molten metal and transporting the molten metal while maintaining a long time. One example of such molten transport lanes is schematically shown in Figs.

The molten metal transport ladle 1 shown in Figs. 1 and 2 has a bottom portion 10 and a side wall portion 20 extending upward from the rim of the bottom portion 10. A space for accommodating and storing the molten metal M is formed by the bottom portion 10 and the side wall portion 20, that is, the molten metal receiving space S is formed. The upper end of the side wall portion 20 defines an opening for the entrance and exit of the molten metal M into and out of the molten metal receiving space S. Reference numeral C denotes a cover for opening and closing the opening.

The bottom portion 10 is provided with a refractory brick layer 11 formed by stacking refractory bricks 11a in a portion facing the molten metal receiving space S and a castable layer 11 arranged outwardly of the refractory brick layer 11 13) and a metal layer (14). The sidewall portion 20 also has a refractory brick layer 21 formed by stacking refractory bricks 21a at a portion facing the molten metal receiving space S and a castable layer 21 disposed outside the refractory brick layer 21, (23) and a metal layer (24).

The refractory brick layers 11 and 21 contact the molten metal M in the molten metal receiving space S and function as a main heat shielding film for suppressing the heat of the molten metal from being transmitted to the outside. The castable layer 13 or 23 is a castable refractory which is a refractory material obtained by mixing water-hard cement or a chemical binder as a binder in a refractory powder and is hardened during curing for a certain period of time after the introduction, And is a heat insulating layer which is provided at a lower cost than the refractory brick layers 11 and 21 to suppress heat loss of the refractory brick layers 11 and 21 to the outside. The metal layers 14 and 24 constitute the outside of the ladle 1 for transporting the molten metal. The metal layers 14 and 24 are formed on the refractory brick layers 11 and 21 and the castable layers 13 and 23 from the impacts or the pressure of the molten metal that may be externally applied during the transportation or handling of the ladle 1 for transporting the molten metal. Such as a steel having sufficient strength and rigidity so as to support and protect it.

Meanwhile, in order to prevent the temperature of the molten metal from dropping below the desired temperature during the transportation of the molten metal from the material supplier to the die casting company, the castable layer of the side wall portion is formed to be considerably thick, The overall weight of the ladles becomes very heavy compared to the weight of the molten metal being carried. For example, when 1 ton of an aluminum alloy melt of about 780 캜 is accommodated in an inner molten metal receiving space and it is desired to carry the molten metal at a temperature of 700 캜 or higher for 2 hours, the overall weight of the molten metal transporting ladle is about 2 tons Is used. Therefore, there is a burden that equipment for handling the molten metal transportation lanes and vehicles and devices for transportation must be made large-scale.

Korean Patent No. 10-0920977

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a lightweight molten metal transportation ladle in which the structure of the side wall portion is improved, whereby the overall weight is reduced and weight can be reduced.

In order to accomplish the above object, the lightweight molten metal transportation rails according to the present invention include a bottom portion and a bottom portion, which is erected upwardly from the rim of the bottom portion and forms a molten metal receiving space for containing and storing the molten metal together with the bottom portion. Wherein the sidewall portion comprises: a refractory brick layer disposed to face the molten metal receiving space and contacting the molten metal in the molten metal receiving space; A castable layer formed of a castable refractory and disposed outside the refractory brick layer, and a castable layer formed of a castable refractory and having a second castable layer disposed outside the first castable layer; A metal layer disposed outside the castable layer and coaxially disposed with the castable layer to form an outer edge of the side wall; And an air layer positioned between the first castable layer and the second castable layer.

The lightweight molten metal transportation ladles according to the present invention are provided with an air layer inside the side wall part so that the insulation can be performed by the air layer so that the side wall part can be lightened without deteriorating the heat insulating property of the side wall part, The weight can be reduced, so that it is possible to handle and transport the ladles for transporting the molten metal even by a small-scale facility or a vehicle, compared with the conventional case.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic vertical cross-sectional view of an example of conventional molten metal transport lanes.
2 is a sectional view taken along the line II-II of the ladle shown in Fig.
3 is a schematic longitudinal cross-sectional view of lightweight molten metal transport lanes of an embodiment of the present invention.
4 is a sectional view taken along the line IV-IV of the lasers shown in FIG.
5 is a schematic exploded perspective view of the air holder shown in Fig.
6 is a schematic assembled perspective view showing a part of the air bearing member shown in Fig. 5 cut out.
7 is a schematic perspective view of an air bearing member of a type different from that of the air bearing member shown in Fig.
8 is a schematic longitudinal sectional view of the air holder shown in Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a lightweight molten metal transporting lane according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 3 is a schematic longitudinal sectional view of a light-weight type molten metal transporting lace according to an embodiment of the present invention, and Fig. 4 is a sectional view taken along the line IV-IV of the lattices shown in Fig. FIG. 5 is a schematic exploded perspective view of the air holder shown in FIG. 3, and FIG. 6 is a schematic assembled perspective view showing a part of the air holder shown in FIG.

3 to 6, the ladle 100 (hereinafter, simply referred to as "ladle") for transporting a lightweight molten metal according to the present embodiment includes a bottom portion 30 and a side wall portion 40 have.

The side wall portion 40 is extended upward from the rim of the bottom portion 30. The side wall portion 40 together with the bottom portion 30 forms a molten metal receiving space S. The molten metal receiving space S is a space for receiving and storing the molten metal M to be transported. The ladle 100 of the present embodiment is characterized in that an opening is defined by the upper end of the side wall portion 40 and the molten metal M enters and exits to and from the molten metal receiving space S through the opening. Reference numeral C denotes a cover for opening and closing the opening.

In the ladle 100 of the present embodiment, the bottom portion 30 includes a refractory brick layer 31, a castable layer 33, and a metal layer 34. The refractory brick layer 31 includes a first refractory brick layer 311 formed so as to face the molten metal receiving space S and stacked with refractory bricks 31a and a second refractory brick layer 311 formed by stacking the first refractory brick layer 311 And a second refractory brick layer 312 formed by stacking the refractory bricks 31b. The castable layer 33 is composed of a first castable layer 331 disposed outside the second refractory brick layer 312 and a second castable layer 332 disposed outside the first castable layer 331 have.

The side wall portion 40 includes a refractory brick layer 41, a castable layer 43, a metal layer 44, and an air retaining body 45. The refractory brick layer 41 includes a first refractory brick layer 411 disposed to face the molten metal receiving space S and stacked with refractory bricks 41a and a second refractory brick layer 411 formed outside the first refractory brick layer 411 And a second refractory brick layer 412 formed by stacking the refractory bricks 41b. The castable layer 43 includes a first castable layer 431 disposed outside the second refractory brick layer 412 and a second castable layer 432 disposed outside the first castable layer 431, Lt; / RTI > The metal layer 44 is disposed on the outer side of the refractory brick layer 41 (more specifically, on the outer side of the castable layer 43). All of the first refractory brick layer 411, the second refractory brick layer 412, the first castable layer 431, the second castable layer 432, the air retaining member 45 and the metal layer 44 are coaxially Respectively. That is, the first refractory brick layer 411, the second refractory brick layer 412, the first castable layer 431, the second castable layer 432, the air retaining member 45, and the metal layer 44 are all the same And has a central axis CL.

The first refractory brick layers 311 and 411 are disposed to face the molten metal receiving space S and come into contact with the molten metal M in the molten metal receiving space S, M) is prevented from being transmitted to the outside. Therefore, it is preferable that the refractory bricks 31a and 41a constituting the first refractory brick layers 311 and 411 are made of a material which has high refractivity and corrosion resistance and does not chemically react with the molten metal. For example, the melt containing space when the molten metal (M) is an aluminum alloy molten metal accommodated in the (S), the first refractory layer refractory bricks (31a, 41a) of (311, 411) is a high-alumina refractory (Al ₂ O _3- SiO ₂ refractory).

The second refractory brick layer 312 and the second refractory brick layer 412 together with the first refractory brick layers 311 and 411 function as a heat trapping layer function for suppressing the heat of the molten metal from being transmitted to the outside. The refractory bricks 31b and 41b of the second refractory brick layers 312 and 412 are not in direct contact with the molten metal M unlike the first refractory brick layers 311 and 411, It is preferable to use those which are less expensive than bricks 31a and 41a and can be provided at low cost. For example, when the refractory bricks 31a and 41a of the first refractory brick layers 311 and 411 are made of a high alumina refractory (Al ₂ O ₃ -SiO ₂ refractory), the second refractory brick layer Refractory products of (312, 412) (31b, 41b) is a high-alumina refractory, while (Al ₂ O ₃ -SiO ₂ based refractory material) than the fire resistance is low, only low heat-insulating property is excellent pyrophyllite quality refractory (SiO ₂ -Al ₂ O _3- system refractory) is preferably used.

As described above, the refractory brick layers 31 and 41 are divided into the first refractory brick layers 311 and 411 that directly contact the molten metal and the second refractory brick layers 311 and 411 disposed outside the first refractory brick layers 311 and 411, The thickness of each of the first refractory brick layers 311 and 411 and the second refractory brick layers 312 and 412 may be set to be a thickness of each of the first refractory brick layers 311 and 411 and the second refractory brick layers 312 and 412, The refractory bricks 31a and 41a of the first refractory brick layers 311 and 411 contacting with the molten metal are made of a material having excellent refractoriness and corrosion resistance, The refractory bricks 31b and 41b of the two refractory brick layers 312 and 412 can be manufactured from a material whose refractivity is lower than that of the refractory bricks 31a and 41a of the first refractory brick layer but which is inexpensive yet excellent in heat insulating property. This makes it possible to maintain the overall thickness of the refractory brick layers 31 and 41 equal to the thickness of the refractory brick layers 11 and 21 in the conventional ladle 1, A brick layer can be formed.

The first castable layers 331 and 431 and the second castable layers 332 and 432 are heat insulating layers for preventing the heat of the refractory brick layers 31 and 41 from being lost to the outside and are manufactured by castable refractories It is less expensive than the refractory brick layers 31 and 41. As the castable refractory for forming the first castable layers 331 and 431 and the second castable layers 332 and 432, a quartz refractory excellent in heat insulating property (low thermal conductivity) (SiO ₂ refractory) can be used. Alternatively, the first castable layers 331 and 431 and the second castable layers 332 and 432 may be formed of castable refractories of different components. For example, the first castable layers 331 and 431 are formed of a quartz refractory (SiO ₂ refractory) having excellent heat insulating properties (low thermal conductivity) and the second castable layers 332 and 334 contacting the metal layers 34 and 44, Containing refractory material (for example, at least 60% by weight of alumina and / or aluminum) having a buffering property and a high high-temperature strength so as to effectively inhibit external impacts from being transmitted through the metal layers 34, Or a refractory material containing at least 20% by weight of ceramic fiber).

The metal layers 34 and 44 constitute the outer edges of the ladle 100. The metal layers 34 and 44 are formed on the refractory brick layers 31 and 41 and the castable layers 33 and 41 from impacts that may be externally applied during transportation or handling of the ladle 100, (E.g., SS400) having sufficient strength and rigidity so as to be able to support and protect the steel sheet 43 (e.g., SS400).

The air bearing member 45 is disposed between the refractory brick layer 41 and the metal layer 44 of the side wall portion 40 (specifically between the first castable layer 431 and the second castable layer 432) Is disposed coaxially with the castable layer (43). The air holding member 45 includes a first pipe member 451, a second pipe member 452 disposed outside the first pipe member 451, an upper plate 457, and a lower plate 458 Respectively. The first pipe member 451 and the second pipe member 452 both extend vertically and are coaxial with the refractory brick layer 41 (for example, the second refractory brick layer 412) of the side wall portion 40 As shown in FIG. The first pipe member 451 and the second pipe member 452 can be formed by, for example, rolling a steel plate in a pipe shape and welding the marginal portions adjacent to each other. The upper plate 457 is formed in a ring shape and includes a first pipe member 451 and a second pipe member 452 so as to cover and close the opening between the upper end of the first pipe member 451 and the upper end of the second pipe member 452, (452). The lower plate 458 is formed in a ring shape so as to cover and close the opening between the lower end of the first tube member 451 and the lower end of the second tube member 452. The first tube member 451, (452).

A space enclosed by the first pipe member 451, the second pipe member 452, the upper plate 457 and the lower plate 458 is formed in the air retaining member 45, and air in the air- An air layer A located between the refractory brick layer 41 of the side wall portion 40 and the metal layer 44 (specifically between the first castable layer 431 and the second castable layer 432) is formed do.

On the other hand, a reinforcing pipe member 453 is provided coaxially with the first pipe member 451 between the first pipe member 451 and the second pipe member 452. The reinforcing pipe member 453 maintains the gap between the first pipe member 451 and the second pipe member 452 (that is, the thickness of the air layer A) So as to reinforce the two-piece member 452 so as to prevent deformation. The reinforcing pipe member 453 in the present embodiment is formed by machining a steel plate so as to have a wave shape and then rolling and welding both edge portions adjacent to each other. The reinforcing pipe member 453 includes a plurality of first contacting portions 453a contacting the outer circumferential surface of the first tubular member 451 and a plurality of second contacting portions 453b contacting the inner circumferential surface of the second tubular member 452, Are alternately arranged along the circumferential direction. The first contact portions 453a are welded to the first tubular member 451 and the second contact portions 453b are welded to the second tubular member 452. In this embodiment,

1 and 2, the ladle 100 is constructed such that the molten metal material is accommodated in the molten metal receiving space S and stored in the material supplier, And is used for carrying the metal material in the molten state to a die-casting company while keeping the molten metal not falling below a predetermined temperature.

Since the ladle 100 of the present embodiment can perform heat insulation between the refractory brick layer 41 and the metal layer 44 of the side wall portion 40 by the air layer A described above, Even if the thickness of the castable layer 43 (amount of castable refractory) of the side wall portion 40 is reduced, the heat insulating property of the side wall portion 40 can be sufficiently secured. Therefore, it is possible to reduce the weight of the ladle 100 without damaging the overall thermal insulation of the side wall portion of the ladle 100. As a result, the ladle 100 of the present embodiment is easier to handle than a facility or a vehicle that handles or transports the conventional ladle 1 as described with reference to Figs. 1 and 2, So that it can be handled and handled. Since the air layer A is provided on the sidewall 40 of the ladle 100 as described above, even when an impact is applied to the sidewall 40, the air layer A functions to buffer the sidewall 40, There is also an effect of alleviating or blocking the shock applied to the motor 40.

Although the ladle 100 for transporting a lightweight molten metal according to an embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

For example, in the present embodiment, although the bottom portion 30 has been described and shown as having a multilayer refractory brick layer, that is, the first and second refractory brick layers 311 and 312, Like refractory brick layer, as in the case of the bottom portion 10 of the first embodiment.

Also, for example, instead of the air retaining body 45 as described above, the air retaining body 45a as shown in Figs. 7 and 8 may be used. This air retaining member 45a differs from the air retaining member 45 described with reference to Figs. 3 to 6 only in that a molten metal passage hole H is formed on one side. The molten metal passage hole H is formed with a hole penetrating between the first pipe member 451 and the second pipe member 452 at one side thereof and then is passed through the hole 459 by a ring- And sealing the air layer A and welding the stopper member 459 to the first tube member 451 and the second tube member 452 to fix them.

The air retaining member 45a is provided with a ladle 101 as schematically shown by using a virtual line in Fig. 8, that is, the side wall portion 40 for pouring out the molten metal accommodated in the molten metal containing space S, And a main outlet 49 having a molten metal flow passage 491 communicated with the molten metal receiving space S may be provided in the ladle 101. Specifically, when the air retaining member 45a is disposed in the sidewall 40 of the ladle 101 so that the molten metal through hole H is located coaxially with the main exit 49, the molten metal flow path 491 The molten metal in the molten metal containing space S can be passed through the molten metal flow path 491 of the main outlet 49 without being blocked by the air retaining member 45a, It can be discharged to the outside.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100 ... molten metal transport ladle 30 ... bottom portion 40 ... side wall portion
41 ... Refractory brick layer 411 ... First refractory brick layer 412 ... Second refractory brick layer
43 ... castable layer 431 ... first castable layer 432 ... second castable layer
44 ... metal layer 45 ... air holder 451 ... first tube member
452 ... second tube member 453 ... reinforcing tube member 457 ... top plate
458 ... bottom plate A ... air layer

Claims (3)

delete delete And a sidewall portion extending upward from the rim of the bottom portion and forming a molten metal receiving space for receiving and storing the molten metal together with the bottom portion,
The side wall portion includes:
A refractory brick layer disposed to face the molten metal receiving space and contacting the molten metal in the molten metal receiving space;
A castable layer formed of a castable refractory and disposed outside the refractory brick layer, and a castable layer formed of castable refractory and having a second castable layer disposed outside the first castable layer;
A metal layer disposed outside the castable layer and coaxially disposed with the castable layer to form an outer edge of the side wall;
An air layer positioned between the first castable layer and the second castable layer; And
And an air holding body disposed between the first castable layer and the second castable layer,
Wherein the air holder comprises:
A first pipe member extending in the vertical direction and disposed coaxially with the refractory brick layer;
A second tubular member disposed coaxially with the first tubular member outside the first tubular member;
A ring-shaped upper plate which covers and closes an opening between the upper end of the first tube member and the upper end of the second tube member;
A ring-shaped lower plate covering and closing an opening formed between a lower end of the first tube member and a lower end of the second tube member; And
A plurality of first contact portions provided coaxially with the first tubular member between the first tubular member and the second tubular member and in contact with the outer circumferential surface of the first tubular member, And a plurality of second contact portions each having a reinforcing pipe member alternately arranged along the circumferential direction,
Wherein the air layer is formed by air in a closed space defined by the first tube member, the second tube member, the upper plate and the lower plate.

Images