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CN111283150A - Filter residue type steel flowing groove for amorphous alloy pouring - Google Patents

Filter residue type steel flowing groove for amorphous alloy pouring Download PDF

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Publication number
CN111283150A
CN111283150A CN202010248187.2A CN202010248187A CN111283150A CN 111283150 A CN111283150 A CN 111283150A CN 202010248187 A CN202010248187 A CN 202010248187A CN 111283150 A CN111283150 A CN 111283150A
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CN
China
Prior art keywords
steel
corundum
runner
flowing groove
screen plate
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Pending
Application number
CN202010248187.2A
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Chinese (zh)
Inventor
李青
李志恩
李博
张宇峰
赵伟伟
韩运锋
付元奎
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Taiyuan Iron and Steel Group Co Ltd
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Taiyuan Iron and Steel Group Co Ltd
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Priority to CN202010248187.2A priority Critical patent/CN111283150A/en
Publication of CN111283150A publication Critical patent/CN111283150A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/007Treatment of the fused masses in the supply runners

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a filter residue type runner for amorphous alloy casting, which comprises a stainless steel shell, a corundum runner, a refractory material filling layer and a porous filter screen plate. Wherein, the stainless steel shell is an inverted trapezoid structure, the corundum runner channel is inclined at a certain angle with the horizontal direction under the support of the refractory material filling layer, and the tail end of the corundum runner channel is provided with an inclined steel outlet. When high-temperature molten steel is injected into the corundum runner tank, under the action of the porous filter screen plate, solid inclusions and a small part of liquid inclusions in the high-temperature molten steel are deeply filtered and blocked at one side of the porous filter screen plate, and pure alloy solution continuously flows downstream along the corundum runner tank to flow into a tundish. The implementation of the invention can effectively filter the slag of the molten steel which is not completely cleaned in the smelting process, the steel slag in the steel flowing groove and/or the brushed refractory material, and can also filter the newly formed liquid large-particle impurities formed by combining certain substances in the molten steel and oxygen, thereby having remarkable effects of improving the purity of the molten steel, reducing the nozzle plugging rate of the manufactured belt and improving the quality of the ultrathin belt.

Description

Filter residue type steel flowing groove for amorphous alloy pouring
Technical Field
The invention relates to a filter residue type steel flowing groove for amorphous alloy pouring, in particular to a filter residue type steel flowing groove used in a high-temperature alloy pouring process during preparation of an amorphous/nanocrystalline ultrathin strip, and belongs to the field of amorphous strip preparation.
Background
The thickness range of the common amorphous/nanocrystalline strip in the current market is approximately concentrated in 18-30 mu m, the amorphous/nanocrystalline strip is continuously developed towards thinner and wider directions along with market demands, and higher requirements are correspondingly provided for the purity and consistency of high-temperature molten steel flowing through a wide slit of 0.23-0.35 mm.
Generally, after vacuum remelting, refining and slagging, high-temperature molten steel is basically clean. However, when molten steel is poured into the tundish from the inside of the vacuum furnace, oxidized inclusions and scoured inclusions of refractory materials on the surface of the molten steel inevitably occur, and the probability of making the strip with a blocked nozzle is greatly increased, so that the pollution of the pouring process to the molten steel is reduced, and the efficient pouring becomes a key link in the production process of the ultrathin strip.
The Chinese invention patent CN 102240784A provides a steel flowing groove device capable of discharging scum and impurities in the continuous production process of an amorphous strip, wherein, smelting steel slag is blocked in a slag discharging groove by an upper slag baffle plate and a lower slag baffle plate; the Chinese utility model patent CN 203900454U discloses a diversion trench for casting iron-based amorphous alloy molten steel, which reduces the oxidation of the molten steel and stabilizes the temperature of the molten steel through gas protection and a heating device; chinese utility model patent CN 204125478U discloses an iron-based amorphous strip steel flowing tank slag-blocking device, which designs a plurality of electric heating rod mounting holes on both sides of the end pouring outlet of the steel flowing tank so that the molten steel does not influence the flow speed due to temperature reduction when flowing.
In the patent documents, the blowing of the protective gas can only reduce the further oxidation of the molten steel, effective removal measures are not taken for the existing inclusions in the molten steel, and the blowing gas can aggravate the temperature reduction of the molten steel and reduce the flow rate of the molten steel; a large amount of molten steel can remain in the slag discharging groove after the slag blocking device finishes pouring. Therefore, the design of the steel flowing groove which is economical, reasonable and capable of efficiently filtering the inclusions in the molten steel has very important significance for reducing the mouth blocking rate of the amorphous/nanocrystalline ultrathin strip and ensuring the smooth production.
Disclosure of Invention
The invention aims to provide a filter residue type steel flowing tank for amorphous alloy casting, which solves the technical problems of nozzle blockage and the like caused by inclusion in high-temperature molten steel when an amorphous/nanocrystalline ultrathin strip is prepared, can effectively filter the inclusion in the high-temperature molten steel and improves the success rate of strip production.
The invention provides a filter residue type steel flowing groove for amorphous alloy pouring, which comprises: the stainless steel shell, the corundum runner, the refractory material filling layer, the porous filter screen plate and the steel tapping hole; the stainless steel shell is of an inverted trapezoidal structure; the stainless steel shell and the corundum runner are filled with refractory materials (quartz sand and water glass) to form a refractory material filling layer; in order to ensure that the molten steel completely and smoothly flows to the steel tapping hole from one side of the molten steel injection point of the corundum runner, a refractory material filling layer is used for fixing the corundum runner into a certain descending gradient, namely, the cross section of the bottom of the corundum runner forms an included angle of 5-8 degrees with the horizontal plane; the porous filter screen plate is vertically fixed at the front end of the corundum runner trough close to one side of steel casting by using high-temperature mud (high-temperature powder and high-temperature glue), and the injection point of the molten steel is at the upstream of the porous filter screen plate; the bottom of the porous filter screen plate is of a semicircular structure so as to be fully matched in the runner steel groove; a steel tapping hole is arranged at the bottom of the downstream of the corundum runner.
In the using process, high-temperature molten steel is poured into the corundum runner trough from the vacuum furnace through the steel pouring funnel, solid inclusions and a small part of liquid inclusions in the high-temperature molten steel are deeply filtered and blocked at one side of the porous filter screen plate under the action of the porous filter screen plate, and pure alloy solution continuously flows into the tundish along the inclined corundum runner trough.
In the device, the contact surface of the corundum runner and the molten steel is arc-shaped, namely, the inside (ingate) of the trough body is in smooth transition.
In the device, the refractory material filling layer is a refractory insulating layer filled with quartz sand and water glass at the periphery and the bottom of the stainless steel shell and the corundum runner steel groove; the thickness of the periphery is 50-80 mm, and the functions of fixing the steel flowing groove and insulating molten steel are achieved; the thickness of bottom refractory material filling layer reduces from the steel pouring hole to the steel-tapping hole for steel flowing groove bottom cross section is 5~8 inclinations with the horizontal direction, and the upper surface is parallel and level with stainless steel shell upper surface, and the molten steel of being convenient for all flows out.
Furthermore, the refractory material filling layer comprises the following substances in percentage by mass: water glass: the ratio of the quartz sand to the mixed caking material is =1:1: 9.5-10, and the caking material is kneaded into a mass by hand and is not loosened.
In the device, the porous filter screen plate is a foamed ceramic filter, the material is silicon carbide, the thickness is 22mm, the pore size is 25ppi (25 pores per square inch), the weight is light, the channel is bent, the specific surface area is large, and when the flocculated and billowing molten metal passes through the foamed ceramic filter, the molten metal is changed into stable, uniform and clean molten metal. The bottom of the porous filter screen plate is designed into a circular arc shape, is matched with the bottom of the steel flowing groove, and the top end of the porous filter screen plate is higher than the upper edge of the steel flowing groove. The porous filter screen plate is used for carrying out deep filtration on the inclusion in the high-temperature molten steel, and the inclusion comprises solid inclusion and a small part of liquid inclusion.
In the device, the porous filter screen plate is vertically fixed at one side, close to steel pouring, of the front end of the corundum runner by using high-temperature mud, the high-temperature mud comprises high-temperature powder and high-temperature glue, and the high-temperature powder is mixed powder of silicon carbide and silicon nitride; the high-temperature glue is aluminum phosphate solution; putting the high-temperature powder and the high-temperature glue into an acid-resistant container, and mixing the high-temperature powder: high temperature glue =2.5:1 mass ratio modulation. The high-temperature mud resists high temperature of 1800 ℃.
In the device, the steel tapping hole of the steel flowing groove is designed at the tail end of the corundum steel flowing groove, and an inclination angle of 95-98 degrees is formed between the steel tapping hole and the bottom of the corundum steel flowing groove. On one hand, the smooth buffer section of the molten steel self-flowing steel groove can smoothly flow out, and on the other hand, the molten steel can be prevented from splashing everywhere when flowing out.
The invention has the beneficial effects that:
through the implementation of the invention, when high-temperature molten steel is poured into the tundish from the vacuum furnace quickly, on one hand, the slag of the molten steel which is not completely cleaned in the smelting process and the steel slag and/or the flushed refractory material in the steel flowing groove can be filtered, on the other hand, the newly formed liquid large-particle impurities formed by combining certain substances in the molten steel and oxygen can be filtered, and the invention has obvious effects on improving the purity of the molten steel, reducing the nozzle blocking rate of a manufactured belt and improving the quality of an extremely thin belt.
Drawings
FIG. 1 is a schematic structural diagram of a filter residue type steel flowing groove for amorphous alloy casting.
Fig. 2 is a top view of fig. 1.
FIG. 3 is a front view of a stainless steel housing comprising the slag runner of the present invention.
Fig. 4 is a top view of fig. 3.
FIG. 5 is a front view of a corundum runner constituting the filter-residue type runner of the present invention.
Fig. 6 is a top view of fig. 5.
FIG. 7 is a structural view of a ceramic foam filter constituting the filter residue type flow channel of the present invention.
FIG. 8 is a schematic diagram of the process for casting the amorphous/nanocrystalline ultrathin strip of steel according to example 1 of the present invention.
In the figure, 1 is a stainless steel shell, 2 is a corundum runner, 3 is a refractory material filling layer, 4 is a porous filter screen plate, 5 is a steel tapping hole, 6 is a steel receiving funnel, 7 is a vacuum furnace, and 8 is a tundish.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
as shown in fig. 1-8, a filter residue type steel flowing groove for amorphous alloy pouring comprises: the steel-making device comprises a stainless steel shell 1, a corundum runner 2, a refractory material filling layer 3, a porous filter screen plate 4 and a steel tapping hole 5; the stainless steel shell 1 is of an inverted trapezoidal structure; a refractory material (quartz sand and water glass) is filled between the stainless steel shell 1 and the corundum runner 2 to form a refractory material filling layer 3; in order to ensure that the molten steel flows from one side of the molten steel injection point of the corundum runner 2 to the steel tapping hole 5 completely and smoothly, the corundum runner 2 is fixed to a certain descending gradient by using a refractory material filling layer 3; the porous filter screen plate 4 is vertically fixed at the front end of the corundum runner trough close to one side of cast steel by high-temperature mud (high-temperature powder and high-temperature glue), and the injection point of the molten steel is at the upstream of the porous filter screen plate 4; the bottom of the porous filter screen plate 4 is of a semicircular structure so as to be fully matched in the runner steel groove; a steel tapping hole 5 is arranged at the bottom of the downstream of the corundum runner 2.
The contact surface of the corundum runner tank and the molten steel is arc-shaped, namely the interior of the tank body is in smooth transition.
The refractory material filling layer is a refractory heat-insulating layer filled with quartz sand and water glass at the periphery and the bottom of the stainless steel shell and the corundum runner steel groove; the thickness of the periphery is 50-80 mm, and the functions of fixing the steel flowing groove and insulating molten steel are achieved; the thickness of bottom refractory material filling layer reduces from the steel pouring hole to the steel-tapping hole for steel flowing groove bottom cross section is 5~8 inclinations with the horizontal direction, and the upper surface is parallel and level with stainless steel shell upper surface, and the molten steel of being convenient for all flows out.
Furthermore, the refractory material filling layer comprises the following substances in percentage by mass: water glass: the ratio of the quartz sand to the mixed caking material is =1:1: 9.5-10, and the caking material is kneaded into a mass by hand and is not loosened.
The porous filter screen plate is a foamed ceramic filter, is made of silicon carbide, has the thickness of 22mm, the pore size of 25ppi, light weight, bent channel and large specific surface area, and when the flocculated and billowing metal liquid passes through the foamed ceramic filter, the metal liquid is changed into stable, uniform and clean metal liquid; the bottom of the porous filter screen plate is designed into a circular arc shape and is matched with the bottom of the steel flowing groove.
The porous filter screen plate is vertically fixed at one side, close to steel pouring, of the front end of the corundum runner by using high-temperature mud, the high-temperature mud comprises high-temperature powder and high-temperature glue, and the high-temperature powder is mixed powder of silicon carbide and silicon nitride; the high-temperature glue is aluminum phosphate solution; putting the high-temperature powder and the high-temperature glue into an acid-resistant container, and mixing the high-temperature powder: high temperature glue =2.5:1 mass ratio modulation. The high-temperature mud resists high temperature of 1800 ℃.
And the steel tapping hole of the steel flowing groove is designed at the tail end of the corundum steel flowing groove and forms an inclination angle of 95-98 degrees with the bottom of the corundum steel flowing groove.
FIG. 8 is a schematic diagram of an exemplary process for casting an amorphous/nanocrystalline ultrathin strip of steel according to the present invention, comprising: a steel receiving funnel 6, a vacuum furnace 7, a filter residue type steel flowing groove and a tundish 8.
The working process of the filter residue type steel flowing groove is as follows: when high-temperature molten steel is injected into the steel flowing groove through the steel receiving funnel 6 by the inclined vacuum furnace 7, the injection point is positioned at the upstream of the porous filter screen plate, the high-temperature molten steel flows down in the inclined corundum steel flowing groove 2 and is subjected to deep filtration by the porous filter screen plate 4, solid inclusions and a small part of liquid inclusions in the high-temperature molten steel are blocked at one side of the porous filter screen plate 4, and pure alloy solution continuously flows into the tundish 8 along the steel tapping hole 5 of the inclined corundum steel flowing groove 2.
After the steel is poured, the steel flowing groove is cooled to a certain temperature, and the steel slag on the porous filter screen plate can be cleaned.
When the filter channel of the porous filter screen plate is blocked and the filter effect is poor after multiple uses, the filter screen plate can be replaced, and the porous filter screen plate is fixed again by using high-temperature mud (high-temperature glue and high-temperature powder).

Claims (7)

1. The utility model provides a steel groove is flowed with filter residue formula to metallic glass pouring which characterized in that: the runner includes: the stainless steel shell, the corundum runner, the refractory material filling layer, the porous filter screen plate and the steel tapping hole; the stainless steel shell is of an inverted trapezoidal structure; the space between the stainless steel shell and the corundum runner is filled with refractory materials to form a refractory material filling layer; in order to ensure that the molten steel flows from one side of the molten steel injection point of the corundum runner to the steel tapping hole completely and smoothly, a refractory material filling layer is used for fixing the corundum runner to a descending slope; the porous filter screen plate is vertically fixed at one side of the front end of the corundum flow steel tank close to steel casting, and the molten steel injection point is at the upstream of the porous filter screen plate; the bottom of the porous filter screen plate is of a semicircular structure so as to be fully matched in the runner steel groove; a steel tapping hole is arranged at the bottom of the downstream of the corundum runner.
2. The filter residue type steel flowing groove for amorphous alloy pouring according to claim 1, which is characterized in that: the contact surface of the corundum runner tank and the molten steel is arc-shaped, namely the interior of the tank body is in smooth transition.
3. The filter residue type steel flowing groove for amorphous alloy pouring according to claim 1, which is characterized in that: the refractory material filling layer is a refractory heat-insulating layer filled with quartz sand and water glass at the periphery and the bottom of the stainless steel shell and the corundum runner steel groove; the thickness of the periphery is 50-80 mm, and the functions of fixing the steel flowing groove and insulating molten steel are achieved; the thickness of bottom refractory material filling layer reduces from the steel pouring hole to the steel-tapping hole for steel flowing groove bottom cross section is 5~8 inclinations with the horizontal direction, and the upper surface is parallel and level with stainless steel shell upper surface, and the molten steel of being convenient for all flows out.
4. The filter residue type steel flowing groove for amorphous alloy pouring according to claim 3, characterized in that: the refractory material filling layer comprises the following substances in percentage by mass: water glass: the ratio of the quartz sand to the mixed caking material is =1:1: 9.5-10, and the caking material is kneaded into a mass by hand and is not loosened.
5. The filter residue type steel flowing groove for amorphous alloy pouring according to claim 1, which is characterized in that: the porous filter screen plate is a foamed ceramic filter, is made of silicon carbide, has the thickness of 22mm, the pore size of 25ppi, light weight, bent channel and large specific surface area, and when the flocculated and billowing metal liquid passes through the foamed ceramic filter, the metal liquid is changed into stable, uniform and clean metal liquid; the bottom of the porous filter screen plate is designed into a circular arc shape, is matched with the bottom of the steel flowing groove, and the top end of the porous filter screen plate is higher than the upper edge of the steel flowing groove.
6. The filter residue type steel flowing groove for amorphous alloy pouring according to claim 1, which is characterized in that: the porous filter screen plate is vertically fixed at one side, close to steel pouring, of the front end of the corundum runner by using high-temperature mud, the high-temperature mud comprises high-temperature powder and high-temperature glue, and the high-temperature powder is mixed powder of silicon carbide and silicon nitride; the high-temperature glue is aluminum phosphate solution; putting the high-temperature powder and the high-temperature glue into an acid-resistant container, and mixing the high-temperature powder: blending high-temperature glue =2.5:1 in mass ratio; the high-temperature mud can resist the high temperature of 1800 ℃.
7. The filter residue type steel flowing groove for amorphous alloy pouring according to claim 1, which is characterized in that: and the steel tapping hole of the steel flowing groove is designed at the tail end of the corundum steel flowing groove and forms an inclination angle of 95-98 degrees with the bottom of the corundum steel flowing groove.
CN202010248187.2A 2020-04-01 2020-04-01 Filter residue type steel flowing groove for amorphous alloy pouring Pending CN111283150A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112525745A (en) * 2020-11-03 2021-03-19 北京科技大学 Physical simulation test device for scouring erosion of tundish lining refractory and using method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926248B1 (en) * 1997-12-23 2002-07-03 Danieli Corus Europe BV Runner for guiding a flow of liquid metal
US20050126738A1 (en) * 2003-12-11 2005-06-16 Tingey John S. Heated trough for molten metal
CN101161375A (en) * 2007-11-21 2008-04-16 内蒙古科技大学 Gate bag for amorphous alloy production
CN202741722U (en) * 2012-06-14 2013-02-20 山东富海实业股份有限公司 Non-stick aluminium composite flow groove for casting aluminium and aluminium alloy
CN203900454U (en) * 2014-04-24 2014-10-29 兆晶股份有限公司 Flow guide groove for pouring iron-based amorphous alloy molten steel
CN204115489U (en) * 2014-10-14 2015-01-21 重庆材料研究院有限公司 Vacuum induction melting furnace water steel chute device
CN206632349U (en) * 2017-04-07 2017-11-14 江苏美特林科特殊合金股份有限公司 High temperature alloy foundry alloy production chuting system
CN209021227U (en) * 2018-10-09 2019-06-25 山西太钢不锈钢股份有限公司 A kind of smelting nickel-base alloy helps conductance chute with molten steel
CN209021181U (en) * 2018-09-30 2019-06-25 英赛德耐火材料(镇江)有限公司 A kind of molten aluminum chute prefabricated component

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926248B1 (en) * 1997-12-23 2002-07-03 Danieli Corus Europe BV Runner for guiding a flow of liquid metal
US20050126738A1 (en) * 2003-12-11 2005-06-16 Tingey John S. Heated trough for molten metal
CN101161375A (en) * 2007-11-21 2008-04-16 内蒙古科技大学 Gate bag for amorphous alloy production
CN202741722U (en) * 2012-06-14 2013-02-20 山东富海实业股份有限公司 Non-stick aluminium composite flow groove for casting aluminium and aluminium alloy
CN203900454U (en) * 2014-04-24 2014-10-29 兆晶股份有限公司 Flow guide groove for pouring iron-based amorphous alloy molten steel
CN204115489U (en) * 2014-10-14 2015-01-21 重庆材料研究院有限公司 Vacuum induction melting furnace water steel chute device
CN206632349U (en) * 2017-04-07 2017-11-14 江苏美特林科特殊合金股份有限公司 High temperature alloy foundry alloy production chuting system
CN209021181U (en) * 2018-09-30 2019-06-25 英赛德耐火材料(镇江)有限公司 A kind of molten aluminum chute prefabricated component
CN209021227U (en) * 2018-10-09 2019-06-25 山西太钢不锈钢股份有限公司 A kind of smelting nickel-base alloy helps conductance chute with molten steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112525745A (en) * 2020-11-03 2021-03-19 北京科技大学 Physical simulation test device for scouring erosion of tundish lining refractory and using method

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Application publication date: 20200616