CN111306937A - Launder and vacuum induction melting furnace - Google Patents
Launder and vacuum induction melting furnace Download PDFInfo
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- CN111306937A CN111306937A CN202010256912.0A CN202010256912A CN111306937A CN 111306937 A CN111306937 A CN 111306937A CN 202010256912 A CN202010256912 A CN 202010256912A CN 111306937 A CN111306937 A CN 111306937A
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- 230000006698 induction Effects 0.000 title claims abstract description 15
- 238000002844 melting Methods 0.000 title abstract description 13
- 230000008018 melting Effects 0.000 title abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 102
- 239000000956 alloy Substances 0.000 claims abstract description 102
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 238000003723 Smelting Methods 0.000 claims abstract description 10
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 14
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/0806—Charging or discharging devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/14—Charging or discharging liquid or molten material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/0806—Charging or discharging devices
- F27B2014/0818—Discharging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a launder and a vacuum induction smelting furnace, and relates to the technical field of metallurgical equipment. The flow groove comprises at least two groove sections which are sequentially communicated, and the at least two groove sections are arranged in an angle manner; the vacuum induction melting furnace comprises the launder. At least two groove sections in all the groove sections of the launder provided by the invention are arranged in an angle, and the alloy liquid in the two angularly arranged groove sections can transfer heat mutually, so that the temperature reduction in the pouring process of the alloy liquid can be reduced, the temperature difference of the alloy liquid injected into and flowing out of the launder can be reduced, and the high superheat phenomenon in the pouring process and the quality of an alloy cast ingot can be improved; meanwhile, the change of the flow direction of the alloy liquid when the alloy liquid flows in the flow groove is beneficial to improving the flow field of the alloy liquid, and is further beneficial to improving the quality of the alloy cast ingot.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a launder and a vacuum induction smelting furnace.
Background
Vacuum Induction Melting (VIM) refers to a metallurgical method for melting a charge by heating the charge by generating an eddy current in a metal conductor by electromagnetic induction under a Vacuum condition. The VIM process has the characteristics of small volume of a smelting chamber, short vacuumizing time and smelting period, convenience in temperature and pressure control, capability of recovering volatile elements, accurate control of alloy components and the like. Due to the above characteristics, VIM has been developed as one of the important processes for producing special alloys such as special steel, precision alloys, electrothermal alloys, high temperature alloys, and corrosion resistant alloys.
The high-temperature alloy is a metal material which takes iron, nickel and cobalt as the base and can work for a long time at the high temperature of more than 600 ℃ under the action of certain stress, has excellent high-temperature strength, good oxidation resistance and hot corrosion resistance, good comprehensive performances such as fatigue property, fracture toughness and the like, is also called as super alloy and is mainly applied to the fields of aerospace and energy.
In the prior art, high-temperature alloy manufacturers all use a launder to connect a smelting chamber and a pouring chamber in a vacuum induction smelting furnace, so as to ensure that alloy liquid in the smelting chamber flows into an ingot mold in the pouring chamber, thereby completing electrode preparation in the subsequent smelting process.
However, in the launder in the prior art, the temperature difference between the alloy liquid during injection and outflow is large, which easily causes the phenomenon of high superheat degree in the pouring process, and further causes the quality of the alloy cast ingot to be poor.
Disclosure of Invention
The invention aims to provide a launder, which is used for relieving the technical problem that in the launder in the prior art, the temperature difference between the alloy liquid during injection and outflow is large, so that the phenomenon of high superheat degree is easily caused in the pouring process, and further the quality of an alloy cast ingot is poor.
The launder provided by the invention comprises at least two trough sections which are sequentially communicated, wherein the at least two trough sections are arranged in an angle manner.
Furthermore, the number of the groove sections is three, and the three groove sections are respectively a first groove section, a second groove section and a third groove section; the second groove section and the first groove section are arranged in a reverse direction, and the third groove section and the second groove section are arranged perpendicularly.
Furthermore, flow limiting assemblies are arranged between the first groove section and the second groove section, in the second groove section and between the second groove section and the third groove section, and are used for changing the flow form of the alloy liquid.
Furthermore, the flow limiting assembly comprises a retaining wall and a blocking dam, the retaining wall is fixedly connected between the two side walls of the launder, and the blocking dam is fixedly arranged on the bottom wall of the launder; along the flow direction of alloy liquid, the dam with the barricade interval sets up, just the dam is located the low reaches of barricade.
Further, the distance between the dam and the retaining wall is 20-50 mm.
Further, along the flow direction of the alloy liquid, the distance between the baffle and the retaining wall is 30 mm.
Further, the bottom end of the dam is provided with a circulation groove.
Further, the circulation groove is located at an intermediate position of the dam.
Furthermore, along the direction perpendicular to the alloy liquid flow direction, a circulation gap is arranged between at least one side of the dam and the side wall of the launder.
The launder provided by the invention can produce the following beneficial effects:
the launder provided by the invention comprises at least two sections which are sequentially communicated, wherein at least two sections are arranged in an angle in all the sections, and the alloy liquid in the two sections arranged in the angle can transfer heat mutually, so that the temperature reduction in the pouring process of the alloy liquid can be reduced, the temperature difference of the alloy liquid poured into and flowing out of the launder can be reduced, and the high superheat phenomenon in the pouring process and the quality of an alloy cast ingot can be improved; meanwhile, the change of the flow direction of the alloy liquid when the alloy liquid flows in the flow groove is beneficial to improving the flow field of the alloy liquid, and is further beneficial to improving the quality of the alloy cast ingot.
The second purpose of the invention is to provide a vacuum induction melting furnace, so as to solve the technical problem that in the launder of the vacuum induction melting furnace in the prior art, the temperature difference between the alloy liquid during the injection and the outflow is large, which easily causes the phenomenon of high superheat degree in the pouring process, and further causes the poor quality of the alloy cast ingot.
The vacuum induction melting furnace provided by the invention comprises the launder.
The vacuum induction melting furnace provided by the invention has all the beneficial effects of the launder, and therefore, the details are not repeated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic top view of a launder according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a RTD curve for a flow cell of the prior art;
FIG. 5 is an RTD curve for a flow cell provided by an embodiment of the invention.
Icon:
100-water inlet;
200-water outlet;
310-a first retaining wall; 320-a first dam; 330-a second retaining wall; 340-a second dam; 350-a third retaining wall; 360-a third dam;
400-a flow-through tank;
500-flow through gap.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "middle", "inside", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the term "vertical" or the like does not mean that the components are required to be absolutely vertical, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic top view of a launder provided in this embodiment.
As shown in fig. 1, the present embodiment provides a launder, which includes three trough sections that are sequentially connected, the three trough sections are a first trough section, a second trough section and a third trough section, respectively, the second trough section is disposed opposite to the first trough section, and the third trough section is disposed perpendicular to the second trough section.
Here, "disposed in opposite directions" means that the flow directions of the alloy liquids in the two tank sections are opposite to each other, and "disposed vertically" means that the flow directions of the alloy liquids in the two tank sections are 90 °.
The launder that this embodiment provided, including the three groove section that communicates in proper order, and the second groove section is 180 settings with first groove section, and the third groove section is 90 settings with the second groove section, and the alloy liquid in two adjacent groove sections all can heat transfer mutually to can reduce the temperature reduction of alloy liquid pouring in-process, reduce the difference in temperature of the alloy liquid of pouring into and outflow launder, and then be favorable to improving the high phenomenon of superheat degree in the pouring process and improve the quality of alloy ingot casting. In addition, when the alloy liquid flows into the second groove section from the first groove section, the flow direction is changed for the first time, and when the alloy liquid flows into the third groove section from the second groove section, the flow direction is changed for the second time, so that the flow form of the alloy liquid is changed, the flow field of the alloy liquid is favorably improved, and the quality of the alloy cast ingot is favorably improved.
It should be noted that in other embodiments of the present application, the number of groove segments is not limited to three, for example: the number of the groove sections can also be two, and the two groove sections are vertically arranged; further, in other embodiments of the present application, even if the number of groove segments is three, the arrangement of three groove segments may not be limited to the above form, for example: the second groove section is perpendicular to the first groove section, and the third groove section is also perpendicular to the second groove section. As long as at least two groove sections are arranged at an angle in all the groove sections of the flow groove, the alloy liquid in the two groove sections arranged at the angle of the flow groove can mutually transfer heat, and the temperature difference of the alloy liquid injected into and flowed out of the flow groove can be reduced.
Specifically, in this embodiment, the water inlet 100 of the runner is located near the range shown by the dotted line in fig. 1, and the water inlet 100 is a range of positions, not a solid structure; the delivery port 200 of the launder is arranged in the third trough section, and the delivery port 200 is arranged on the bottom wall of the launder. When the alloy liquid pouring device is used, the alloy liquid in the smelting chamber is directly poured into the water inlet 100 from the upper part of the launder, and finally flows out of the launder from the water outlet 200 and flows into the pouring chamber.
After the alloy liquid is injected into the launder, heat exchange exists between the alloy liquid and the launder, and the alloy liquid and the launder also have heat radiation, so that the alloy liquid at the water inlet 100 and the water outlet 200 of the launder has temperature difference, and the larger the temperature difference is, the poorer the fluidity of the alloy liquid in the launder is, thereby being not beneficial to the improvement of the flow field of the alloy liquid and the removal of impurities. In the launder provided by the embodiment, the angle is formed between the sections, so the structure is compact, the heat radiation can be reduced, the temperature difference of the alloy liquid at the positions of the water inlet 100 and the water outlet 200 can be obviously reduced, the fluidity of the alloy liquid in the launder provided by the application is better, and the improvement of the flow field of the alloy liquid and the removal of impurities in the alloy liquid are facilitated. According to the test result, the temperature difference value of the alloy liquid at the water inlet 100 and the alloy liquid at the water outlet 200 of the launder provided by the application is 20-50 ℃.
In this embodiment, flow limiting assemblies are disposed between the first groove section and the second groove section, in the second groove section, and between the second groove section and the third groove section, and the flow limiting assemblies are used for changing the flow form of the alloy liquid. The flow-limiting assembly can increase the change of the flow form of the alloy liquid in the launder, thereby further improving the flow field of the alloy liquid, better removing the impurities in the alloy liquid and improving the quality of the alloy.
Specifically, a first flow limiting assembly is arranged between the first groove section and the second groove section, and the first flow limiting assembly comprises a first retaining wall 310 and a first dam 320; a second flow limiting assembly is arranged in the second groove section, and comprises a second retaining wall 330 and a second retaining dam 340; a third flow limiting assembly is arranged between the second groove section and the third groove section, and the third flow limiting assembly comprises a third retaining wall 350 and a third dam 360.
Fig. 2 is a sectional view taken along line a-a of fig. 1, and fig. 3 is a sectional view taken along line B-B of fig. 1.
As shown in fig. 1 to 3, in the embodiment, each retaining wall is fixedly connected between two side walls of the launder, and each dam is fixedly arranged on the bottom wall of the launder; along the flow direction of alloy liquid, in each current-limiting assembly, the dam and the retaining wall are arranged at intervals, and the dam is located at the downstream of the retaining wall.
In this embodiment, all the dams and the retaining walls are rectangular, and in each flow limiting assembly, the top ends of the dams are higher than the bottom ends of the retaining walls, and the clear heights of the dams are smaller than the clear heights of the retaining walls. When the alloy liquid flows to the flow limiting assembly, the part of the alloy liquid close to the liquid level is firstly blocked by the retaining wall, and flows through the space between the retaining wall and the bottom wall of the launder and continues to flow; then the part of the alloy liquid close to the bottom wall of the launder is blocked by the dam, and the alloy liquid continues to flow after changing the flow direction. After the alloy liquid flows through the retaining wall, impurities in the alloy liquid can float upwards, and then the alloy liquid collides with the retaining wall to facilitate the aggregation and growth of the impurities, so the impurities in the alloy liquid can be effectively removed after the alloy liquid flows through each flow limiting assembly, and the quality of an alloy ingot can be improved.
In this embodiment, dam and barricade all set up in the chute along vertical direction to dam and barricade all can play the effect that changes flow direction better to the alloy liquid.
It should be noted that in other embodiments of the present application, the dam and the retaining wall may be disposed at an angle to the runner, for example: the dam and the retaining wall are inclined 3 degrees from top to bottom towards the flowing direction of the alloy liquid, so long as the dam and the retaining wall can change the flowing direction of the alloy liquid, improve the flow field of the alloy liquid and increase the removal of impurities, and the inclination angle and the inclination direction of the dam and the retaining wall are not particularly limited.
In this embodiment, in each flow restricting assembly, the distance between the dam and the retaining wall is 20-50 mm.
Preferably, the distance between the dam and the retaining wall is 30mm in the flow direction of the alloy liquid. Through simulation calculation, the flow field of the alloy liquid is better and the impurities are better removed in the arrangement mode.
In this embodiment, as shown in fig. 2, in each flow-limiting assembly, the bottom end of the dam is provided with a flow channel 400. The circulation groove 400 is used to smoothly flow the alloy liquid near the bottom wall of the launder through the dam.
Specifically, the flow channel 400 may be located at an intermediate position of the bottom end of the dam.
It should be noted that the position of the flow-through channel 400 is not limited to the middle position of the bottom end of the dam, nor is the number of flow-through channels 400 limited to one, for example: the number of the circulation grooves 400 may be three, and the three circulation grooves 400 are uniformly arranged in the width direction of the dam.
In this embodiment, as shown in fig. 2, a flow gap 500 is formed between each of the two sides of the dam and the side wall of the launder in a direction perpendicular to the flow direction of the molten alloy.
In other embodiments of the present application, the flow gap 500 may be provided between only one side of the dam and the side wall of the launder, and the present application does not limit which side of the dam and the side wall of the launder are provided with the flow gap 500, as long as the alloy liquid can smoothly flow through the dam.
Some characteristic parameters of the flow cell can be obtained by a "stimulation-response method", that is, adding a saturated KCL solution at the water inlet 100, and then measuring the change of the liquid conductivity at the water outlet 200 by using a conductivity meter to obtain an RTD (residence time distribution) curve of the alloy liquid in the flow cell, for example: the ratio of the total mixing area and the average residence time, etc.
A model established based on geometric similarity, motion similarity and dynamic similarity principles and a model of the flow cell provided in this embodiment are tested by using a certain conventional flow cell as a prototype, fig. 4 is an RTD curve of the flow cell in the prior art, fig. 5 is an RTD curve of the flow cell provided in this embodiment, and table 1 is values of characteristic parameters of two types of flow cells.
TABLE 1 launder calculation results
First, the various performance parameters in table 1 are briefly introduced:
dead zone: the fluid in the dead zone has no flow and diffusion, which is equivalent to reducing the effective volume of the flow groove. The presence of dead zones does not greatly affect the floatation of large particle inclusions, but for small and medium inclusions (less than 20 microns), the small and medium inclusions float relatively quickly without having a chance to collide and aggregate and grow large because of the absence of fluid flow. In the dead zone and the limited detention time, the small and medium-sized inclusions do not float upwards in the dead zone, so the removal efficiency of the inclusions (especially the small and medium-sized inclusions) by the dead zone can be considered as zero. Therefore, the smaller the dead zone ratio, the better.
A piston area: in this region, the masses entering the container at the same time all exit the container at the same time and do not mix with the masses that entered the container before or after they entered the container. The piston area is beneficial to floating of impurities. Therefore, the larger the piston area ratio, the better.
A fully mixed area: in this region, the flow mass is completely mixed with the other flow masses immediately after entering the container, and the order of flow mass entering the container is not separated. The large proportion of the complete mixing area is beneficial to the uniform mixing of the alloy liquid.
Stagnation time: the shortest time from the start of adding the pulse signal to the response of the water outlet is, the stagnation time is prolonged, and the piston area is increased.
Peak time: and the longer the peak value time is, the smaller the peak value is, the more gentle the curve is, and the more reasonable the flow field is.
Average residence time: the residence time is long, and the impurities in the alloy liquid float for a sufficient time, thereby being beneficial to removing the impurities in the alloy liquid.
Then, the flow cell of the prior art and the flow cell provided in this example were analyzed with reference to fig. 4, fig. 5 and table 1 as follows:
as shown in fig. 4 and table 1, the RTD curve of the prior art launder has large fluctuation, multiple peaks, and a severe rise, the stagnation time is only 16.6s, the time is too short, the dead zone proportion is 25.9%, the proportion is large, the effective volume of the launder is too small, and the alloy liquid is not favorable for flowing in the launder, that is, the fluidity of the alloy liquid in the launder is poor, and the removal of inclusions and the improvement of the flow field of the alloy liquid are not favorable.
As shown in fig. 5 and table 1, in the RTD curves of the flow cell provided by the present application, each curve is smooth, and the shape similarity of each curve is high, and the fluctuation range is narrow. In addition, the dead zone ratio of the launder provided by the present application is only 0.26 times that of the launder of the prior art; and the piston area, the total mixing area, the stagnation time, the peak time and the average residence time are respectively improved by 11 percent, 46 percent, 51 percent, 56 percent and 11 percent compared with the test results of the flow groove in the prior art.
In conclusion, when the alloy liquid flows in the launder provided by the application, the flow path and the flow form of the alloy liquid are greatly changed, so that the impact, aggregation, growth, floating and removal of impurities in the alloy liquid are facilitated, and the purity, the metallurgical quality and the comprehensive use performance of the obtained alloy can be improved.
The present embodiment also provides a vacuum induction melting furnace comprising the launder as described above.
In particular, a launder is connected between the melting chamber and the pouring chamber of the vacuum induction melting furnace.
The vacuum induction melting furnace provided by the embodiment has all the advantages of the launder, and therefore, the detailed description thereof is omitted.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a launder, its characterized in that, is including two at least groove sections that communicate in proper order, and two at least the groove section is the angle setting.
2. The launder of claim 1, wherein the number of trough sections is three, three being a first, second and third trough section, respectively; the second groove section and the first groove section are arranged in a reverse direction, and the third groove section and the second groove section are arranged perpendicularly.
3. The launder of claim 2, wherein flow restricting assemblies are provided between the first and second trough sections, within the second trough section and between the second and third trough sections, for altering the alloy liquid flow pattern.
4. The launder of claim 3, wherein the flow restriction assembly comprises a retaining wall and a dam, the retaining wall being fixedly connected between two side walls of the launder, the dam being fixedly arranged at the bottom wall of the launder; along the flow direction of alloy liquid, the dam with the barricade interval sets up, just the dam is located the low reaches of barricade.
5. Launder according to claim 4, characterized in, that the distance between the dam and the retaining wall is 20-50 mm.
6. The launder of claim 5, characterized in that the distance between said dam and said retaining wall in the direction of alloy liquid flow is 30 mm.
7. Launder according to any one of claims 4-6, characterized in that the bottom end of the dam is provided with a flow through channel (400).
8. Launder according to claim 7, characterized in that the flow through channel (400) is located in the middle of the dam.
9. Launder according to any one of claims 4-6, characterized in that a flow-through gap (500) is provided between at least one side of the dam and the side wall of the launder in a direction perpendicular to the flow direction of the alloy liquid.
10. A vacuum induction smelting furnace characterized by comprising the launder of any one of claims 1 to 9.
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| CN202010256912.0A CN111306937A (en) | 2020-04-02 | 2020-04-02 | Launder and vacuum induction melting furnace |
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| CN202010256912.0A CN111306937A (en) | 2020-04-02 | 2020-04-02 | Launder and vacuum induction melting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030016A (en) * | 2020-11-05 | 2020-12-04 | 北京科技大学 | High-tungsten high-cobalt-nickel alloy and smelting method and shaped charge liner thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11239847A (en) * | 1998-02-24 | 1999-09-07 | Daido Steel Co Ltd | Ingot-making apparatus for molten metal |
| 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 |
| CN105466221A (en) * | 2015-12-25 | 2016-04-06 | 天津恒天冠辰科技有限公司 | Smelting furnace launder |
| CN205741163U (en) * | 2016-05-18 | 2016-11-30 | 永城金联星铝合金有限公司 | A kind of Rose Box chute without residual aluminum |
| 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 |
| CN110802222A (en) * | 2018-08-06 | 2020-02-18 | 宝钢特钢有限公司 | Vacuum induction pouring tundish |
| CN212645342U (en) * | 2020-04-02 | 2021-03-02 | 钢铁研究总院 | Launder and vacuum induction melting furnace |
-
2020
- 2020-04-02 CN CN202010256912.0A patent/CN111306937A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11239847A (en) * | 1998-02-24 | 1999-09-07 | Daido Steel Co Ltd | Ingot-making apparatus for molten metal |
| 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 |
| CN105466221A (en) * | 2015-12-25 | 2016-04-06 | 天津恒天冠辰科技有限公司 | Smelting furnace launder |
| CN205741163U (en) * | 2016-05-18 | 2016-11-30 | 永城金联星铝合金有限公司 | A kind of Rose Box chute without residual aluminum |
| CN110802222A (en) * | 2018-08-06 | 2020-02-18 | 宝钢特钢有限公司 | Vacuum induction pouring tundish |
| 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 |
| CN212645342U (en) * | 2020-04-02 | 2021-03-02 | 钢铁研究总院 | Launder and vacuum induction melting furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030016A (en) * | 2020-11-05 | 2020-12-04 | 北京科技大学 | High-tungsten high-cobalt-nickel alloy and smelting method and shaped charge liner thereof |
| CN112030016B (en) * | 2020-11-05 | 2021-01-15 | 北京科技大学 | High-tungsten high-cobalt-nickel alloy and smelting method and shaped charge liner thereof |
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