CN209736576U - Novel rotational flow downward casting device - Google Patents
Novel rotational flow downward casting device Download PDFInfo
- Publication number
- CN209736576U CN209736576U CN201822255095.8U CN201822255095U CN209736576U CN 209736576 U CN209736576 U CN 209736576U CN 201822255095 U CN201822255095 U CN 201822255095U CN 209736576 U CN209736576 U CN 209736576U
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- Prior art keywords
- brick
- pipe
- molten steel
- injection pipe
- slit
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- 238000005266 casting Methods 0.000 title claims description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 76
- 239000010959 steel Substances 0.000 claims abstract description 76
- 239000011449 brick Substances 0.000 claims abstract description 64
- 238000002347 injection Methods 0.000 claims description 58
- 239000007924 injection Substances 0.000 claims description 58
- 239000002184 metal Substances 0.000 claims description 14
- 239000004576 sand Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000009970 fire resistant effect Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 39
- 239000000243 solution Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
The utility model discloses a new whirl down cast device, including well notes pipe, the cross gate, the runner, the mould, fire-resistant central brick, fire-resistant steel tail brick, be equipped with cylindrical fire-resistant spiral stator in the well notes pipe brick and as the slit of air chamber, be equipped with the slit in well notes pipe brick as the air chamber, with air supply pipe air feed in to the slit, a plurality of air supply hole is opened to well notes pipe brick wall that is close to one side of molten steel at the slit, well notes pipe brick air feed can pass through the air supply pipe, because the whirl effect of molten steel, be the spiral motion come-up and to central gathering and stirring molten steel behind the molten steel of notes pipe in making gas entering. In the process, the bubbles can capture impurities and absorb harmful gas, and float upwards in a moving way, so that the aim of removing the impurities and the harmful gas is fulfilled, the purity of the molten steel is further improved, and a steel ingot with higher quality is produced.
Description
Technical Field
The utility model relates to a steel casting technical field especially relates to a new whirl is cast device down.
background
The bottom casting method is a technological method widely applied to steel ingot casting, and when the bottom casting method is adopted, molten steel is required to sequentially enter a middle pouring pipe from a steel ladle, flow into a transverse pouring gate and an upper pouring gate, finally enter a casting mold and solidify into a steel ingot in the casting mold.
However, the following problems still exist in the practical application of the following casting method:
(1) After molten steel in a steel ladle enters the middle pouring pipe, the axial flow velocity of the molten steel is very high, and the refractory central brick at the bottom of the middle pouring pipe brick is subjected to strong scouring and erosion of the molten steel, so that exogenous nonmetallic inclusions in the molten steel are increased, and the cleanliness of the molten steel is seriously influenced; there is currently no treatment for the endogenous and exogenous inclusions produced during the undercasting process;
(2) Because the molten steel has very big velocity of flow in the filler pipe, can be from the bellmouth on the filler pipe in the casting process of molten steel involving in air to form many bubbles, these bubbles can be down fast along with the molten steel, most bubbles can stop down gradually and turn to the come-up because of buoyancy, and the speed of floating of some small bubbles is because being less than the molten steel velocity of flow down, can be wrapped up in the carrier by the molten steel and get into in the cross gate and can't accomplish the come-up in the filler pipe, and further get into the mould along with the molten steel, thereby lead to the steel billet to appear the risk of gas pocket defect and increase. In addition, air bubbles involved in the molten steel can cause secondary oxidation of the molten steel and reduce the performance of a billet product; there is currently no way to reduce these small bubbles during casting;
(3) The molten steel contains some harmful gases, such as H2, N2 and the like.
Disclosure of Invention
In view of the above-mentioned technical problems, the present invention provides a new rotational flow lower casting device, which removes inclusions in molten steel by blowing gas into the molten steel of a middle injection pipe; due to the rotational flow effect of the molten steel, gas floats upwards in a spiral circular motion around the axis of the central injection pipe after entering the molten steel of the central injection pipe and is gathered towards the center, and the purpose of removing impurities and harmful gas is achieved in the process in a mode of capturing impurities, fine bubbles, dissolving gas and the like. This improves the quality of the ingot.
The utility model discloses a technical means as follows:
a new swirling flow downcasting apparatus comprising: the device comprises a central injection pipe, a cross gate, an upper gate, a casting mold and an air supply pipe; the outer wall of the injection pipe is a metal injection pipe, and the inner wall of the injection pipe is an injection pipe brick.
The top of the middle pouring pipe is a molten steel casting bell mouth, the bottom of the middle pouring pipe is provided with a refractory central brick, the molten steel of the middle pouring pipe is distributed to a plurality of cross runners, the cross runners are horizontally arranged, the liquid inlet ends of the cross runners are communicated with the middle pouring pipe through the refractory central brick, and the liquid outlet ends of the cross runners are provided with refractory steel runner tail bricks;
the upper pouring gate is vertically arranged, the bottom end of the upper pouring gate is communicated with the cross pouring gate through a refractory runner tail brick, and the top of the upper pouring gate is communicated with a molten steel inlet at the bottom of the casting mold;
A cylindrical refractory spiral stator is arranged in the middle casting pipe brick, and a slit is arranged in the middle casting pipe brick below the stator; the slit is communicated with the gas supply pipe, namely the gas supply pipe can blow gas into the slit, and a plurality of gas supply holes are formed in one side of the slit, which is close to the molten steel, so that the gas is blown into the molten steel of the central injection pipe.
Further, in the above-mentioned case,
the wall of the middle injection pipe close to one side of the molten steel is made into a gas permeable brick and/or provided with a gas supply hole in the slit.
Further, in the above-mentioned case,
The torsion angle of the cylindrical fireproof spiral stator is 60-300 degrees.
Further, in the above-mentioned case,
the outer wall of the injection pipe is a metal injection pipe, and the inner wall of the injection pipe is an injection pipe brick;
A gap is arranged between the metal middle injection pipe and the middle injection pipe brick, and sand is filled in the gap.
The air supply pipe is led out from the outer wall of the middle injection pipe brick, extends upwards from sand between the middle injection pipe brick and the metal middle injection pipe and is led out from the bell mouth of the middle injection pipe.
the utility model adopting the technical proposal has three air supply modes; firstly, the gas supply pipe passes through the hole of the metal middle injection pipe, passes through the sand and the hole on the wall of the middle injection pipe brick outside the slit and supplies gas into the slit of the middle injection pipe brick; secondly, an air supply pipe is led out from the outer wall of the middle injection pipe brick, extends upwards from sand between the middle injection pipe brick and the metal middle injection pipe and is led out from the bell mouth of the middle injection pipe; thirdly, the gas supply pipe passes through the joint of the upper part and the lower part of the metal middle injection pipe (the length of the middle injection pipe exceeds 3200mm and is divided into two parts) to reach the middle injection pipe brick, and gas is directly blown into the molten steel.
the utility model has the advantages that:
Compared with the prior art, under the condition that does not reduce well sprue inlet molten steel velocity of flow, make the molten steel when well sprue produces the whirl, be equipped with the slit in the lateral wall of well sprue brick as the air chamber, with the air supply pipe air feed in to the slit, a plurality of holes are opened to well sprue brick wall that is close to one side of molten steel at the slit, or make the slit be close to well sprue brick wall on one side of molten steel for air brick, blow in well sprue molten steel with gas, can increase the stroke of bubble in the molten steel more effectively, the collision between bubble and the inclusion, make bubble and inclusion gather to the centre, be favorable to the come-up to get rid of. The aim of removing impurities and harmful gases is achieved, so that the purity of molten steel is further improved, and a steel ingot with higher quality is produced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of the present invention.
fig. 2-1 is an enlarged view of the middle air supply part when the slit is adopted in the present invention.
Fig. 2-2 is an enlarged view of the middle air supply part when the air brick is adopted in the utility model.
fig. 3-1 is an enlarged view of the air supply portion of the present invention when the air supply pipe is drawn out from the bell mouth.
Fig. 3-2 is an enlarged view of the middle gas supply portion of fig. 3-1 with the slits replaced with air bricks.
Fig. 4 is a top view of the metal middle injection pipe, sand, middle injection pipe brick, air supply pipe and air chamber of the present invention.
Fig. 5 is the utility model discloses structural schematic when well notes pipe adopts mosaic structure.
Fig. 5-1 is a schematic structural view of the upper structure of the center pipe in fig. 5.
Fig. 5-2 is a schematic structural view of the lower structure of the center pillar of fig. 5.
fig. 6-1 is a schematic structural view of the cylindrical fire-resistant helical stator of the present invention rotating 60 °.
Fig. 6-2 is a schematic structural view of the cylindrical fire-resistant helical stator of the present invention rotating 120 °.
Fig. 6-3 are schematic structural views of the cylindrical fire-resistant helical stator of the present invention rotating 180 °.
Fig. 6-4 are schematic structural views of the cylindrical fire-resistant helical stator of the present invention rotating 300 °.
In the figure: 1 is a bell mouth, 2 is a middle injection pipe brick, 3 is sand, 4 is a metal middle injection pipe, 5 is a cross gate, 6 is a refractory central brick, 7 is a casting mould, 8 is a refractory central brick, 9 is a runner tail brick, 10 is a cylindrical refractory spiral stator, and 11 is a slit; the gas supply pipe 12, the gas permeable brick 13 and the gas supply hole 14.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
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 accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
it is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, 2-1 and 2-2, the utility model provides a novel rotational flow lower casting device, which comprises a middle pouring pipe brick 2, a cross runner 5, an upper runner 6 and a casting mould 7; the top of the middle injection pipe brick 2 is provided with a bell mouth 1, and the bottom of the middle injection pipe brick 2 is provided with a fireproof central brick 8; the horizontal pouring gate 5 is horizontally arranged, the liquid inlet end of the horizontal pouring gate 5 is communicated with the middle pouring pipe brick 2 through a refractory central brick 8, and the liquid outlet end of the horizontal pouring gate 5 is provided with a refractory runner tail brick 9; the upper pouring gate 6 is vertically arranged, the bottom end of the upper pouring gate 6 is communicated with the cross gate 5 through a refractory runner tail brick 9, and the top of the upper pouring gate 6 is communicated with a molten steel inlet at the bottom of the casting mold 7; it is characterized in that a cylindrical fire-resistant spiral stator 10 is arranged in the middle injection pipe brick 2, a slit 11 is arranged in the middle injection pipe brick below the cylindrical fire-resistant spiral stator 10 of the middle injection pipe, gas is blown into molten steel through a gas supply pipe, and a schematic diagram of an insertion mode of the gas supply pipe is shown in figures 2-1 and 2-2; FIGS. 3-1 and 3-2 are views of another insertion of the gas supply tube by supplying gas directly into the slots; FIG. 5 shows the manner in which air is blown directly through the air supply tube;
As shown in fig. 5-1 and 5-2, the two components are adopted for combined assembly when the length requirement of the central injection pipe is more than 3200 mm;
The torsion angle of the cylindrical refractory spiral stator 10 is 60-300 degrees;
The cylindrical refractory spiral stator 10 is arranged inside the middle injection pipe brick 2;
when the spiral-flow type blowing method is adopted for steel casting, molten steel in a steel ladle flows into the middle injection pipe brick 2 through the bell mouth 1 at the top of the middle injection pipe, firstly impacts on the cylindrical fire-resistant spiral stator 10, the molten steel continues to flow downwards along the spiral channel of the cylindrical fire-resistant spiral stator 10, so that the molten steel flowing out of the cylindrical fire-resistant spiral stator 10 presents a spiral flow state, the axial flow velocity distribution of the molten steel can be effectively and uniformly, the maximum axial flow velocity of the molten steel in the middle injection pipe brick 2 is reduced simultaneously, and the quantity of bubbles generated by involving air in the molten steel is reduced. In addition, in the molten steel rotational flow state, some small bubbles and non-metallic inclusions which are difficult to float up smoothly are combined into large bubbles and large inclusions due to mutual collision, and meanwhile, the small inclusions collide with the large bubbles and are wrapped by the large bubbles to float up, so that the floating probability of the bubbles and the inclusions is finally improved, the number of the bubbles and the inclusions wrapped by the molten steel and in a runner is reduced, the number of the bubbles and the inclusions entering a casting mold is further reduced, and then, the argon is blown into the molten steel, so that the stroke of the bubbles in the molten steel and the collision between the bubbles and the inclusions can be effectively increased, the bubbles and the inclusions are gathered towards the middle, and the floating removal is facilitated. Harmful gas can be removed by blown bubbles, so that the purity of molten steel is further improved, and a steel ingot with higher quality is produced.
Application example one: the refractory spiral stator 10 is added into the tundish brick 2 and the slot 11 is supplied with gas by a gas supply pipe, and a plurality of gas supply holes 14 are opened on the side of the slot 10 close to the molten steel on the wall of the tundish brick, and the gas is blown into the molten steel.
application example two: the refractory spiral stator 10 is added to the tundish block 2 and the slit 11 is supplied with gas by a gas supply pipe, and the tundish block on the side of the slit 11 close to the molten steel is directly supplied with gas by using the gas permeable block 13 as a material.
Application example three: the refractory spiral stator 10 is added into the middle injection pipe brick 2, and a gas supply pipe penetrates through the joint of the upper part and the lower part of the metal middle injection pipe 4 to reach the middle injection pipe brick, so that gas is directly blown into molten steel.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. A new cyclone casting apparatus, comprising: the device comprises a central injection pipe, a cross gate, an upper gate, a casting mold and an air supply pipe;
the top of the middle pouring pipe is a molten steel casting bell mouth, the bottom of the middle pouring pipe is provided with a refractory central brick, the molten steel of the middle pouring pipe is distributed to a plurality of horizontal runners, the horizontal runners are horizontally arranged, the liquid inlet ends of the horizontal runners are communicated with the middle pouring pipe through the refractory central brick, and the liquid outlet ends of the horizontal runners are provided with refractory runner steel tail bricks;
The upper pouring gate is vertically arranged, the bottom end of the upper pouring gate is communicated with the cross pouring gate through a refractory runner tail brick, and the top of the upper pouring gate is communicated with a molten steel inlet at the bottom of the casting mold;
a cylindrical refractory spiral stator is arranged in the middle casting pipe brick, and a slit is arranged in the middle casting pipe brick below the stator; the slit is communicated with the gas supply pipe, namely the gas supply pipe can blow gas into the slit, and a plurality of gas supply holes are formed in one side, close to the molten steel, of the slit and blow the gas into the molten steel of the central injection pipe.
2. A new cyclone casting apparatus according to claim 1, wherein:
The wall of the middle injection pipe close to one side of the molten steel is made into a gas permeable brick and/or provided with a gas supply hole in the slit.
3. a new down-casting apparatus of swirling flow according to claim 1 or 2, characterized in that: the torsion angle of the cylindrical refractory spiral stator is 60-300 degrees.
4. A new down-casting apparatus of swirling flow according to claim 1 or 2, characterized in that:
the air supply pipe is led out from the outer wall of the middle injection pipe brick, extends upwards from sand between the middle injection pipe brick and the metal middle injection pipe and is led out from a bell mouth of the middle injection pipe.
5. a new down-casting apparatus of swirling flow according to claim 1 or 2, characterized in that:
when the length of the metal injection pipe exceeds 3200mm, an upper part and a lower part are assembled in a split way.
6. A new cyclone casting apparatus according to claim 5, wherein:
When the length of the metal injection pipe exceeds 3200mm, the gas supply pipe penetrates through the joint of the upper part and the lower part of the metal injection pipe to reach the middle injection pipe brick, and gas is directly blown into molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822255095.8U CN209736576U (en) | 2018-12-29 | 2018-12-29 | Novel rotational flow downward casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822255095.8U CN209736576U (en) | 2018-12-29 | 2018-12-29 | Novel rotational flow downward casting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209736576U true CN209736576U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822255095.8U Expired - Fee Related CN209736576U (en) | 2018-12-29 | 2018-12-29 | Novel rotational flow downward casting device |
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| Country | Link |
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| CN (1) | CN209736576U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396365A (en) * | 2018-12-29 | 2019-03-01 | 东北大学 | Casting device under a kind of new eddy flow |
| CN112121969A (en) * | 2020-08-24 | 2020-12-25 | 柯超 | Method for preparing fire brick grains by utilizing waste runner bricks |
-
2018
- 2018-12-29 CN CN201822255095.8U patent/CN209736576U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396365A (en) * | 2018-12-29 | 2019-03-01 | 东北大学 | Casting device under a kind of new eddy flow |
| CN112121969A (en) * | 2020-08-24 | 2020-12-25 | 柯超 | Method for preparing fire brick grains by utilizing waste runner bricks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 |