KR20170069051A - Tundish and method for making a filter - Google Patents

Tundish and method for making a filter Download PDF

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Publication number
KR20170069051A
KR20170069051A KR1020150176276A KR20150176276A KR20170069051A KR 20170069051 A KR20170069051 A KR 20170069051A KR 1020150176276 A KR1020150176276 A KR 1020150176276A KR 20150176276 A KR20150176276 A KR 20150176276A KR 20170069051 A KR20170069051 A KR 20170069051A
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KR
South Korea
Prior art keywords
filter
refractory
tundish
binder
molten steel
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Application number
KR1020150176276A
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Korean (ko)
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KR101853768B1 (en
Inventor
김장훈
박지원
이상필
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주식회사 포스코
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Priority to KR1020150176276A priority Critical patent/KR101853768B1/en
Publication of KR20170069051A publication Critical patent/KR20170069051A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay

Abstract

The tundish according to the present invention comprises a main body having an internal space in which molten steel is accommodated and a dam mounted on a bottom surface of the main body and installed to move molten steel into an upper space at an upper portion of the tundish, A weir provided between the dam and the weir, the CaO-based compound being contained in the weir to move the molten steel into the lower space of the lower stage, .
According to the embodiment of the present invention, CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 The non-metallic inclusion removing performance can be improved. Therefore, it is possible to prevent the occurrence of defects due to nonmetallic materials and to improve the quality of the cast steel.

Description

TECHNICAL FIELD [0001] The present invention relates to a tundish and a method of manufacturing a filter,

The present invention relates to a tundish and a method of manufacturing a filter, and more particularly, to a tundish and a method of manufacturing a filter that facilitate removal of nonmetallic inclusions.

Non-metallic inclusions such as Al 2 O 3 that are present in the molten steel and are not removed until completion of solidification adversely affect the quality of the slab, that is, the steel, and also affect the limitation of the continuous casting water. Therefore, it is necessary to remove non-metallic inclusions in the molten steel before continuous casting of the cast steel.

Generally, the removal of nonmetallic inclusions in molten steel is started by preventing inclusion of slag into the molten steel during the steelmaking step by the converter to prevent nonmetallic inclusions. In the second refining step of RH degassing the molten steel that has been cast from the converter to the ladle, And removal of non-metallic inclusions by accelerating the reaction of the interface between the metal and the slag.

Attempts have been made to remove nonmetallic inclusions in the tundish, to increase the residence time of the molten steel by installing a dam in the tundish, to inject the inert gas into the tundish to separate the inclusions, and to remove the inclusions. However, It can not be removed. In addition, the size of the nonmetallic inclusions that can be removed by increasing the residence time of the molten steel due to the dam installation is about 30 mu m, the size of the nonmetallic inclusions that can be removed by bubbling the inert gas is 15 mu m, It is difficult to remove fine inclusions, and fine unincorporated inclusions aggregate or adhere to the inner wall of the immersion nozzle to cause nozzle clogging.

As a method for removing nonmetallic inclusions using a dam, another method for removing nonmetallic inclusions in the tundish is to make the tundish dam from alumina (Al 2 O 3 ) -silica (SiO 2 ). This dam of alumina (Al 2 O 3 ) -silica (SiO 2) only has the function of physically separating the inclusions by changing the flow of molten steel in the tundish. Therefore, the dam of alumina (Al 2 O 3) -silica (SiO 2) has a problem that the effect of removing inclusions is not sufficient.

Korea registered patent 0244637

The present invention provides a method of manufacturing a tundish and a filter including a filter that facilitates removal of non-metallic inclusions.

The present invention provides a method of manufacturing a tundish and a filter including a filter that facilitates trapping and removing fine inclusions.

A tundish according to the present invention includes: a main body having an inner space in which molten steel is received; And a dam mounted on a bottom surface of the main body, the molten steel being movable into an upper space at an upper end of the dam; A weir disposed at a position spaced apart from the dam in the main body and spaced apart from a bottom surface in the main body so that the molten steel is movable into the lower space at the lower end; And a filter installed between the dam and the weir and containing a CaO based compound and reacting with the nonmetallic inclusions in the molten steel to collect the nonmetallic inclusions.

Preferably, the filter is spaced within 1 m from the weir.

Wherein the filter is a porous or honeycombed tundish having a plurality of pores.

Preferably, the filter has a porosity of 15% to 40%.

The filter comprises a refractory material containing a first material of at least one of CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 and a second material of CaO · SiO 2 .

The refractory material containing 80 wt% to 95wt% with respect to the entirety of the filter, the remainder portion includes a strength enhancing agent to the heat resistance of the enhancer, ZrO 2 and Al 2 O 3 containing SiO2 comprising at least one.

And a pore-forming agent for forming pores in the filter, wherein the pore-forming agent is one of graphite and a polymer.

It is preferable that CaO in the refractory contains 10 wt% to 75 wt% in total.

The present invention relates to a method of manufacturing a filter installed in a tundish and collecting non-metallic inclusions in molten steel accommodated in the tundish, comprising the steps of: preparing and mixing a refractory containing a CaO-based compound and a binder; And forming a porous mixture having a plurality of pores by molding a mixture of the refractory and the binder, wherein the refractory comprises at least one of CaTiO 3 , CaZrO 3 , CaSiO 3, and CaCO 3 1 material.

In the production of the porous shaped article having the plurality of pores, in the process of producing the molded article, a molded article having a plurality of pores in the form of a hole is formed by an injection molding method, or a refractory material containing the CaO- And the binder are mixed, the pore-forming agent is mixed.

The pores are made to be 15% to 40%.

The refractory material and a second material, and the first material, CaO · SiO 2.

In mixing the refractory and the binder, the refractory is mixed so as to include 80 wt% to 95 wt% with respect to the entire filter.

In mixing the refractory and the binder, the heat resistance enhancer and the strength enhancer are further mixed into the refractory and the binder.

It is preferable that the refractory is mixed so as to include 90 wt% to 95 wt% of the refractory, 1 wt% to 10 wt% of the binder, 1 wt% to 25 wt% of the heat resistance enhancer, and 1 wt% to 10 wt% of the strength enhancer.

Mixing a refractory and a binder with a heat resistance enhancer and a strength enhancer, and further mixing a pore-forming agent for forming pores, mixing the refractory material with 80 wt% to 90 wt%, the binder with 1 wt% to 10 wt%, the heat resistance enhancer with 1 wt% By weight to 25% by weight, the strength-increasing agent in an amount of 1% by weight to 10% by weight, and the pore-forming agent in an amount of 5% by weight to 20% by weight.

The heat resistance improver is the strength enhancing agents, comprising the SiO 2 comprises at least one of ZrO 2 and Al 2 O 3.

The pore-forming agent preferably includes at least one of graphite and a polymer.

According to the embodiment of the present invention, CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 The non-metallic inclusion removing performance can be improved. Therefore, it is possible to prevent the occurrence of defects due to nonmetallic materials and to improve the quality of the cast steel.

1 is a view showing a filter for removing inclusions and a tundish including the filter according to an embodiment of the present invention;
2 is a perspective view of a filter for removing inclusions according to an embodiment of the present invention,
FIG. 3 shows the state diagram of CaO-Al 2 O 3
4 is a graph showing the results of experiments comparing the performance of the filter according to the embodiment of the present invention and the filter according to the comparative example

Hereinafter, embodiments of the present invention will be described in detail. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a filter for removing inclusions and a tundish including the filter according to an embodiment of the present invention; FIG. FIG. 2 is an enlarged view illustrating a filter for removing inclusion according to an embodiment of the present invention. 3 is a state diagram of CaO-Al 2 O 3 .

The present invention relates to a filter for collecting and removing non-metallic inclusions in molten steel, and a tundish including the filter. More particularly, the present invention relates to a filter and a tundish including the same that can easily remove and collect non-metallic inclusions having a fine particle size.

1, the tundish 100 according to the embodiment of the present invention includes a main body 110 having an inner space for receiving molten steel introduced from the ladle and provided with a discharge hole 111 through which molten steel is discharged, A weir 130 installed at the upper side of the main body 110 so as to be spaced apart from the bottom of the main body 110 and a dam 120 installed at one end between the weir 130 and the discharge hole 111, And a filter 140 installed at the bottom of the main body 110 between the weir 130 and the dam 120 to remove and collect nonmetallic inclusions in the molten steel.

The main body 110 of the tundish 100 is a means for temporarily storing molten steel introduced from the ladle and supplying the molten steel to a mold located below the tundish 100. [ To this end, a shroud nozzle 200 is provided to connect the ladle and the tundish main body 110, and an immersion nozzle 300 is installed to connect the tundish main body 110 and the mold. The shroud nozzle 200 is preferably installed to extend from the ladle toward the center of the width direction of the dish main body 110 so that the lower portion of the shroud nozzle 200 is inserted into the at least the tundish main body 110 Respectively. The discharge hole 111 is an opening provided to penetrate a part of the bottom of the main body 110 and is preferably provided at one side from the center of the bottom of the main body 110. The immersion nozzle 300 is installed to communicate with the discharge hole 111 from the lower portion of the main body 110. The molten steel supplied to the tundish main body 110 is injected into the mold through the discharge hole and the immersion nozzle 300.

A dam 120 and a weir 130 are installed in the body to increase the residence time of the molten steel and form an upward flow to float and separate the nonmetallic inclusions in the molten steel.

The dam 120 is installed on the bottom of the tundish main body 110, and the lower part is connected to the bottom of the main body 110, and the upper space of the upper part has molten steel capable of moving. More specifically, the dam 120 has a block shape of a predetermined shape, and its length or height in the up and down direction is smaller than the height of the main body. When the dam 120 is mounted on the bottom of the main body 110, the upper space of the dam 120 serves as a passage through which the molten steel can pass.

The weir 130 is disposed between the shroud nozzle 200 and the dam 120 within the tundish main body 110 and is disposed such that the lower end of the weir 130 is spaced apart from the bottom of the main body 110, Allow the molten steel to pass through. More specifically, the weir 130 has a block shape of a predetermined shape, and its length or height in the up and down direction is smaller than the height of the body. The upper end of the weir 130 is connected to the upper part of the main body 110 and the tundish cover or other components located above the main body 110 and the lower end is spaced apart from the bottom of the main body 110, Lt; / RTI >

1, when the weir 130 and the dam 120 are installed in the tundish main body 110, the molten steel flows through the weir 130 and the dam 120, Thereby increasing the residence time of the molten steel between the weir 130 and the dam 120. The molten steel supplied from the shroud nozzle 200 into the tundish main body 110 moves toward the discharge hole 111 provided at the bottom of the main body 110. At this time, The molten steel moving in the direction of the weir 130 first collides with the weir 130 to change the flow (A in Fig. 1) and to pass through the lower portion of the weir 130 (B in Fig. 1) (120). The molten steel moved between the weir 130 and the dam 120 is blocked by the dam while moving in the direction of the discharge hole 111 and collides with the dam 120 to change its flow (D in FIG. 1) to one side space of the dam 120, and then is moved toward the discharge hole 111.

The filter 140 is located in the tundish 110 wall at a position where molten steel is retained inside the tundish main body 110, that is, adjacent to the weir 130 and the dam 120 or the discharge hole 111 , And reacts with nonmetallic inclusions in molten steel to collect nonmetallic inclusions. The filter 140 according to the embodiment of the present invention includes a refractory material composed of a first material of CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 and a second material of CaO · SiO 2 , The total CaO content is preferably 10 wt% to 75 wt%.

 The filter 140 is in the form of a porous or honeycomb having a plurality of pores 141 (see FIG. 2), between the weir 130 and the dam 120 and the bottom surface of the tundish body 110 And the upper side thereof has a structure in which molten steel can be moved. That is, the filter 140 is shaped like a block having a smaller height than the weir 130 and the dam 120, and is installed at the bottom of the tundish main body 110. The filter 140 is spaced apart from the weir 130 and the dam 120. More preferably the distance between the weir 130 and the dam 120 or the discharge hole 111 is 1 m or less Respectively.

The area of the filter 140 is, for example, 50 to 500 mm in width and 100 mm to 1000 mm in height. Of course, the size of the filter 140 is not limited to the above-described example, and may be variously changed according to the volumes of the tundish main body 110, the weir 130, and the dam 120, respectively.

As described above, the filter 140 according to the embodiment is a porous or honeycomb type having a plurality of pores 141, and preferably has a porosity of 15% to 40%. By manufacturing the filter 140 such that the pores 141 are formed, the reaction surface area with the molten steel can be increased, thereby improving the reaction efficiency with the inclusions and the removing effect.

On the other hand, when the porosity is less than 15%, the surface area is small and the reaction efficiency with molten steel is low, and the effect of removing inclusions is reduced. On the contrary, when the porosity exceeds 40%, it is difficult to stably install the filter 140 in the tundish main body as the filter 140 becomes too light due to too much pores . Therefore, in the present invention, the porosity of the filter 140 is set to 15% to 40%.

A method of forming pores in the filter 140 is a method in which a pore-forming agent is mixed with a raw material for producing a filter, or a mixture of raw materials for producing a filter is mixed and processed by an injection molding method to form a plurality of pore- As shown in FIG.

The filter 140 according to the embodiment is manufactured by mixing a refractory material and a binder. Here, in manufacturing the filter 140, 80 wt% to 95 wt% of the refractory material and 1 wt% to 10 wt% of the binder are mixed for the entire material. It further includes a heat resistance enhancer for improving thermal shock resistance and a strength enhancer for enhancing strength.

Here, the refractory material includes a first material and a first material which are CaO-based compounds, wherein the first material is at least one of CaTiO 3 , CaZrO 3 , CaSiO 3, and CaCO 3 , and the second material is CaO · SiO 2 . In the refractories including the first material and the second material, the total amount of CaO is set to 10 wt% to 75 wt%.

On the other hand, when the refractory material is less than 80 wt%, the reaction efficiency with the nonmetallic inclusions is lowered and the effect of trapping or removing inclusions is lowered. On the contrary, when the refractory material exceeds 95 wt%, the content of the heat resistance enhancer and the strength enhancer is reduced, so that the heat resistance and the strength enhancing effect can not be exhibited.

The filter according to the first embodiment mixes a refractory material, a binder, a heat resistance enhancer, and a strength-enhancing agent and forms them by an injection molding method to produce a filter having a plurality of pores in the form of fine holes. At this time, the refractory material is made up to 90 wt% to 95 wt%, the binder 1 wt% to 10 wt%, the heat resistance enhancer 1 wt% to 25 wt%, and the strength enhancer 1 wt% to 10 wt%. Here, it is preferable to use a material containing at least one of ZrO 2 and Al 2 O 3 as the heat enhancing agent and SiO 2 as the heat enhancing agent.

The filter according to the second embodiment has a plurality of pores by further mixing a pore-forming agent with a refractory material, a binder, a heat resistance enhancer and a strength-enhancing agent and molding them. In this case, the refractory material may be 80 wt% to 90 wt%, the binder may be 1 wt% to 10 wt%, the heat resistance enhancer may be 1 wt% to 25 wt%, the strength enhancer may be 1 wt% to 10 wt% .

The pore-forming agent may be at least one of graphite and a polymer pore-forming agent. Here, the pore-forming agent is limited to 5 wt% to 20 wt% in order to make the porosity of the filter 15% to 40%. That is, when the pore-forming agent is less than 5 wt%, the porosity is less than 15%, and when the pore-forming agent is more than 20 wt%, the porosity may exceed 4%.

When a porous filter containing CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 and CaO · SiO 2 as a main material is installed in the tundish main body and reacts with molten steel, alumina (AlO 2 O 3 ) Forms various kinds of CaO-Al 2 O 3 -based compounds as shown in the state diagram shown in FIG. If a low melting point material such as 12CaO · 7Al 2 O 3 (MP: 1415 ° C) is formed, solid inclusions can be removed and a high melting point material such as CaO · 2Al 2 O 3 (MP: 1608 ° C.) It can be trapped in the refractory filter, so that the effect can be exhibited.

FIG. 4 shows experimental results comparing the performance of the filter according to the embodiment of the present invention and the filter according to the comparative example.

Hereinafter, the effect of removing inclusions according to the filter 140 according to the embodiment of the present invention and the filter according to the comparative example will be compared with reference to FIG.

Here, the first and the second filter 140 according to an embodiment comprises a refractory material containing CaTiO 3, a first embodiment of CaTiO 3 added amount is relatively much as compared with the second embodiment. The filter according to the comparative example contains Al 2 O 3 as a refractory.

For the experiment, a plurality of MgO crucibles having the same configuration are provided, and the filter according to the first and second embodiments, the filter according to the comparative example, and the molten steel are charged into the crucible and reacted. Thereafter, as shown in Fig. 4, the interfaces of the filters were compared.

Referring to Fig. 4, the inclusions attached to the filter according to the first and second embodiments are larger than the inclusions attached to the filter according to the comparative example. Further, when the filter according to the first and second embodiments is applied, the amount of reduction (wt%) of Al 2 O 3 , which is a non-metallic inclusion in molten steel, is higher than that in the case of applying the filter according to the comparative example. As a result, it can be seen that the filter 140 according to the first and second embodiments absorbs or collects a much larger amount of non-metallic inclusions (Al 2 O 3 ) than the comparative example.

In the present invention, CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 , which are excellent in reaction with non- The non-metallic inclusion removing performance can be improved. Therefore, it is possible to prevent the occurrence of defects due to nonmetallic materials and to improve the quality of the cast steel.

100: tundish 110: body
111: Exhaust hole 120: Dam
130: Wear 140: Filter
141: Groundwork

Claims (18)

A body having an internal space in which molten steel is received; And
A dam mounted on a bottom surface of the main body and installed to move molten steel into an upper space at an upper end thereof;
A weir disposed at a position spaced apart from the dam in the main body and spaced apart from a bottom surface in the main body so that the molten steel is movable into the lower space at the lower end;
A filter disposed between the dam and the weir and containing a CaO based compound and reacting with the nonmetallic inclusions in the molten steel to collect the nonmetallic inclusions;
A tundish containing. The method according to claim 1,
Wherein the filter is spaced within 1 m from the weir. The method according to claim 1,
Wherein the filter is a porous or honeycombed tundish having a plurality of pores. The method of claim 3,
Wherein the filter has a porosity of 15% to 40%. The method according to claim 1,
Wherein the filter comprises a refractory containing a first material of at least one of CaTiO 3 , CaZrO 3 , CaSiO 3 and CaCO 3 and a second material of CaO · SiO 2 . The method of claim 5,
Wherein the refractory comprises 80 wt% to 95 wt% of the refractory material, and the remainder comprises a heat enhancing agent comprising SiO 2 , ZrO 2 and Al 2 O 3 . The method of claim 6,
Further comprising a pore-forming agent for forming pores in the filter,
Wherein the pore-forming agent is one of graphite and a polymer. The method according to claim 6 or 8,
Wherein the CaO in the refractory comprises 10 wt% to 75 wt% of total tundish. A method of manufacturing a filter installed in a tundish to collect non-metallic inclusions in molten steel accommodated in the tundish,
Preparing and mixing a refractory containing the CaO-based compound and a binder;
Forming a mixture of the refractory and the binder to produce a porous shaped article having a plurality of pores;
/ RTI >
Wherein the refractory comprises a first material of at least one of CaTiO 3 , CaZrO 3 , CaSiO 3, and CaCO 3 . The method of claim 9,
In the production of the porous shaped article having the plurality of pores,
In the process of producing the molded article, a molded product having a plurality of pores in the form of a hole is formed by molding by an injection molding method,
Wherein the pore-forming agent is mixed in the process of mixing the refractory containing the CaO-based compound and the binder. The method of claim 10,
And the pore is 15% to 40%. The method of claim 11,
The method of producing a refractory filter comprising the first material and, CaO · SiO 2 of the second material. The method of claim 12,
In mixing the refractory and the binder,
Wherein the refractory is mixed so as to include 80 wt% to 95 wt% with respect to the entire filter. 14. The method of claim 13,
In mixing the refractory and the binder,
Wherein the heat resistance enhancer and the strength enhancer are further mixed with the refractory and the binder. 15. The method of claim 14,
Wherein the refractory is mixed with 90 wt% to 95 wt%, the binder is 1 wt% to 10 wt%, the heat resistance enhancer is 1 wt% to 25 wt%, and the strength enhancer is 1 wt% to 10 wt%. 14. The method of claim 13,
In the mixing of the refractory and the binder with the heat resistance enhancer and the strength enhancer, a pore-forming agent for forming pores is further mixed,
A filter which mixes the refractory material so as to contain 80 wt% to 90 wt% of the refractory material, 1 wt% to 10 wt% of the binder, 1 wt% to 25 wt% of the heat resistance enhancer, 1 wt% to 10 wt% of the strength enhancer, and 5 wt% ≪ / RTI > 16. The method according to claim 15 or 16,
The heat resistance improver includes a SiO 2,
The strength enhancers method for manufacturing a filter comprising at least one of ZrO 2 and Al 2 O 3. 18. The method of claim 16,
Wherein the pore-forming agent comprises at least one of graphite and a polymer.
KR1020150176276A 2015-12-10 2015-12-10 Tundish and method for making a filter KR101853768B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101981455B1 (en) * 2017-12-11 2019-05-24 주식회사 포스코 Processing apparatus for molten material
WO2022234109A1 (en) * 2021-05-07 2022-11-10 Vesuvius U S A Corporation Tundish with filter module
CN115383103A (en) * 2022-09-29 2022-11-25 广东鸿邦金属铝业有限公司 Tundish for aluminum ingot production line

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100244637B1 (en) * 1995-12-23 2000-03-02 이구택 Tundish filter dam
KR200303465Y1 (en) * 2002-12-13 2003-02-07 주식회사 포스코 One body type tundish dam with horizontal dam filter
JP2010522106A (en) * 2007-03-20 2010-07-01 コーニング インコーポレイテッド Low-shrinkage plugging mixture for ceramic filters, plugged honeycomb filter and manufacturing method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101981455B1 (en) * 2017-12-11 2019-05-24 주식회사 포스코 Processing apparatus for molten material
CN110000367A (en) * 2017-12-11 2019-07-12 株式会社Posco Fusant processing unit
WO2022234109A1 (en) * 2021-05-07 2022-11-10 Vesuvius U S A Corporation Tundish with filter module
CN115383103A (en) * 2022-09-29 2022-11-25 广东鸿邦金属铝业有限公司 Tundish for aluminum ingot production line

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