CN116079040A - Argon blowing and impurity sucking filter for continuous casting tundish and working method thereof - Google Patents
Argon blowing and impurity sucking filter for continuous casting tundish and working method thereof Download PDFInfo
- Publication number
- CN116079040A CN116079040A CN202211576349.0A CN202211576349A CN116079040A CN 116079040 A CN116079040 A CN 116079040A CN 202211576349 A CN202211576349 A CN 202211576349A CN 116079040 A CN116079040 A CN 116079040A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- argon blowing
- channel
- adsorption
- argon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 286
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 143
- 238000007664 blowing Methods 0.000 title claims abstract description 107
- 239000012535 impurity Substances 0.000 title claims abstract description 79
- 238000009749 continuous casting Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 128
- 239000010959 steel Substances 0.000 claims abstract description 128
- 238000001179 sorption measurement Methods 0.000 claims abstract description 96
- 238000001914 filtration Methods 0.000 claims abstract description 76
- 238000009423 ventilation Methods 0.000 claims abstract description 68
- 238000007667 floating Methods 0.000 claims description 36
- 238000005247 gettering Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000009694 cold isostatic pressing Methods 0.000 claims description 5
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 230000003749 cleanliness Effects 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 abstract description 4
- 239000002436 steel type Substances 0.000 abstract description 4
- 239000011819 refractory material Substances 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
- B22D43/004—Retaining slag during pouring molten metal by using filtering means
-
- 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
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention relates to an argon blowing and impurity sucking filter for a continuous casting tundish and a working method thereof, wherein the argon blowing and impurity sucking filter is arranged at the lower part of a retaining wall of the tundish and consists of a filter body, an impurity adsorption and filtration channel and an argon blowing and ventilation element; the inclusion adsorption filtering channel is arranged in the filter body, and two ends of the inclusion adsorption filtering channel are respectively communicated with the impact area and the pouring area; the argon blowing ventilation element is arranged in the filter body and positioned at the molten steel inflow end or the molten steel outflow end. The invention comprises two adsorption mechanisms of inclusion adsorption and filtration channels for adsorbing inclusion and argon blowing and ventilation elements for blowing argon and adsorbing inclusion, and can effectively remove nonmetallic inclusion with different sizes and sizes, including tiny inclusion below 50 μm in molten steel, thereby better improving the cleanliness of the molten steel and meeting the requirements of producing high-quality and high-added-value steel types by continuous casting of the molten steel.
Description
Technical Field
The invention relates to the technical field of molten steel continuous casting, in particular to an argon blowing and impurity sucking filter for a continuous casting tundish and a working method thereof.
Background
Continuous casting equipment generally includes a ladle for supplying molten steel, a long nozzle and a stabilizer for protecting molten steel from the ladle to a tundish, a continuous casting tundish for buffering and distributing molten steel, etc., a submerged nozzle for connecting the tundish and a mold, a mold for solidification molding of molten steel, a subsequent secondary cooling device, etc.
With the continuous improvement of the quality requirements of steel products, in order to meet the requirements of continuous casting production of high-quality and high-added-value steel types, the technical measures for improving the cleanliness of the steel and reducing nonmetallic inclusions in the molten steel are increasingly paid attention to. The continuous casting tundish is a key device in the continuous casting process, and the metallurgical functions of the modern continuous casting tundish not only play roles of buffering and distributing molten steel, uniform components, temperature and the like, but also play roles of promoting nonmetallic inclusion in the steel to float upwards and purifying the molten steel, wherein the tundish impurity-absorbing filter is one of common effective measures for removing the impurities. Under normal conditions, the tundish impurity-absorbing filter, the turbulator, the slag blocking wall and the dam are matched to play roles in better purifying molten steel, promoting impurity floating, reducing nozzle nodulation and preventing the continuous casting submerged nozzle from influencing the continuous casting normal production due to flocculation blocking. The tundish impurity-absorbing filter and the slag blocking wall divide the tundish into an impact area and a pouring area, the area where the long water gap and the flow stabilizer are located is the impact area, the area where the immersed water gap is located is the pouring area, molten steel flows from the impact area to the pouring area through a molten steel channel in the tundish impurity-absorbing filter, and a part of nonmetallic impurities in the molten steel collide with the inner wall of the molten steel channel to be directly absorbed.
The prior tundish impurity-absorbing and filtering technology mostly utilizes the inner surface of an internal molten steel channel (i.e. a filtering channel) to absorb and filter nonmetallic inclusion particles in molten steel, thereby achieving the purpose of removing nonmetallic inclusion in a certain amount of molten steel. However, this tundish gettering filter has several problems: firstly, the principle of the action mechanism of removing impurities by adsorption is single, and the effect of removing impurities by adsorption and filtration on tiny particles is poor; secondly, the structure is simpler, the inner surface of the filtering channel is smoother, the inclusions are not easy to adhere, and the adsorption effect is poor.
Disclosure of Invention
The invention provides an argon blowing and impurity sucking filter for a continuous casting tundish and a working method thereof, which comprise two adsorption mechanisms of impurity adsorption and filtration channels for adsorbing impurities and argon blowing and adsorption impurities of an argon blowing and ventilation element, and can effectively remove nonmetallic impurities with different sizes and sizes, including tiny impurities below 50 mu m in molten steel, thereby better improving the cleanliness of the molten steel and meeting the requirements of producing high-quality and high-added-value steel types by continuous casting of the molten steel.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
an argon blowing and impurity sucking filter for a continuous casting tundish is provided with a tundish retaining wall, and the inner space of the continuous casting tundish is divided into an impact area and a pouring area; the argon blowing and impurity sucking filter is arranged at the lower part of the retaining wall of the tundish and consists of a filter body, an impurity adsorption and filtration channel and an argon blowing ventilation element; the impurity adsorption and filtration channels are arranged in the filter body, and two ends of the impurity adsorption and filtration channels are respectively communicated with the impact area and the pouring area; the argon blowing ventilation element is arranged in the filter body and positioned at the molten steel inflow end or the molten steel outflow end, and an air inlet channel is arranged in the argon blowing ventilation element and is connected with an external air supply pipe.
Further, the argon blowing and impurity sucking filter and the tundish retaining wall are of a composite structure; in the argon blowing and gettering filter, a filter body and an argon blowing and breathing element are of a composite structure.
Further, an argon bubble floating channel is further arranged at one end of the filter body, provided with the argon blowing ventilation element, and the argon blowing ventilation element is arranged at the bottom of the argon bubble floating channel; the height of the argon bubble floating channel is smaller than or equal to the height of the filter body; when the argon blowing ventilation element is arranged at the molten steel inflow end of the filter body, the top of the argon bubble floating channel is communicated with the impact area; when the argon blowing ventilation element is arranged at the molten steel outflow end of the filter body, the top of the argon bubble floating channel is communicated with the pouring area.
Further, the inner surface of the inclusion adsorption filtration channel is provided with an adsorption layer, and the adsorption layer is made of an adsorption material capable of adsorbing nonmetallic inclusion.
Further, the cross section of the inclusion adsorption filtration channel is circular or quasi-circular; the longitudinal section of the inclusion adsorption filtration channel is Z-shaped, S-shaped or L-shaped.
Further, the equivalent diameter of the inclusion adsorption and filtration channel is 20-100 mm, the length of a single inclusion adsorption and filtration channel is not less than 100mm, and at least one turbulence block is arranged in each inclusion adsorption and filtration channel.
Further, the inclusion adsorption filtration channel is horizontally arranged or obliquely arranged outwards and upwards at a section close to the outflow end of molten steel, and the included angle between the inclusion adsorption filtration channel and the horizontal plane is 0-150 degrees.
Further, at least one through molten steel channel is arranged at the bottom of the filter body, the cross section of the through molten steel channel is round, rectangular, round-like or rectangular-like, and one section of the through molten steel channel close to the molten steel outflow end is horizontally arranged or obliquely arranged outwards and upwards, and the included angle between the through molten steel channel and the horizontal plane is 0-50 degrees.
Further, the argon blowing ventilation element is a ventilation refractory material component which is prepared by mixing refractory material particles with different particle diameters with a bonding agent and then performing a cold isostatic pressing process, and is provided with dispersion ventilation holes or straight-through micropores; the equivalent diameter of the dispersion type ventilation holes or the straight-through micropores is more than 0 and less than 2mm; the argon blowing ventilation element is arranged along the longitudinal through length of the filter body, and the width of the argon blowing ventilation element is not less than 20mm.
According to the working method of the argon blowing and impurity sucking filter for the continuous casting tundish, in the continuous casting process, molten steel in an impact area in the tundish flows to a pouring area through an impurity adsorbing and filtering channel and a straight molten steel channel, impurities in the molten steel are adsorbed through an adsorption layer when the molten steel flows through the impurity adsorbing and filtering channel, turbulence is promoted through a turbulence block, so that the impurities in the molten steel collide with the inner surface of the channel, and the adsorption effect is improved; fine argon bubbles are generated by an argon blowing ventilation element arranged at the molten steel inflow end or the molten steel outflow end of the filter body to absorb and float upwards to remove impurities in the molten steel; the molten steel after impurities are removed by adsorption and filtration of impurities through the adsorption layer and adsorption and floating of argon blowing flows into a pouring area.
Compared with the prior art, the invention has the beneficial effects that:
1) The device comprises two adsorption mechanisms of inclusion adsorption and filtration channels for adsorbing inclusion and argon blowing and ventilation elements for blowing argon and adsorbing inclusion, and can effectively remove nonmetallic inclusion with different sizes and sizes, including tiny inclusion below 50 mu m in molten steel, thereby better improving the cleanliness of the molten steel and meeting the requirements of producing high-quality and high-added-value steel types by continuous casting of the molten steel;
2) The argon blowing ventilation element provided by the invention has the advantages that the diffusion type ventilation holes or the straight-through micropores are formed, the ventilation property is good, the bubble flow is tiny and uniformly distributed, and the inclusion can be continuously and stably removed by floating upwards;
3) The turbulent flow blocks are arranged in the inclusion adsorption and filtration channel, so that turbulent flow can be promoted to enable the inclusions in the molten steel to collide with the inner surface of the channel, thereby improving the adsorption effect and more effectively removing the inclusions by adsorption.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1a is a front perspective view of an argon blowing and gettering filter according to embodiment 1 of the present invention.
Fig. 1b is a perspective view of an argon blowing and gettering filter according to embodiment 1 of the present invention.
Fig. 1c is a perspective view II of the argon blowing and gettering filter according to embodiment 1 of the present invention.
Fig. 2a is a front perspective view of the argon blowing and gettering filter according to embodiment 2 of the present invention.
Fig. 2b is a perspective view of the argon blowing and gettering filter according to embodiment 2 of the present invention.
Fig. 2c is a perspective view II of the argon blowing and gettering filter according to embodiment 2 of the present invention.
Reference numerals illustrate:
in the figure: 1. the filter body 2, the inclusion filtering passage 3, the argon blowing ventilation element 4, the air supply pipe 5, the turbulence block 6, the argon bubble floating passage 7, the through molten steel passage 8, the molten steel inflow end 9 (of the filter body) and the molten steel outflow end (of the filter body)
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1 a-1 c and fig. 2 a-2 c, an argon blowing and impurity sucking filter for a continuous casting tundish is provided with a tundish retaining wall to divide the internal space of the continuous casting tundish into an impact area and a pouring area; the argon blowing and impurity sucking filter is arranged at the lower part of the retaining wall of the tundish and consists of a filter body 1, an impurity adsorbing and filtering channel 2 and an argon blowing ventilation element 3; the impurity adsorption and filtration channels 2 are arranged in the filter body 1, and two ends of the impurity adsorption and filtration channels are respectively communicated with the impact area and the pouring area; the argon blowing ventilation element 3 is arranged at the molten steel inflow end 8 or the molten steel outflow end 9 of the filter body 1, and an air inlet channel is arranged in the argon blowing ventilation element 3 and is connected with an external air supply pipe 4.
Further, the argon blowing and impurity sucking filter and the tundish retaining wall are of a composite structure; in the argon blowing and gettering filter, a filter body 1 and an argon blowing and breathing element 3 are of a composite structure.
Further, the filter body 1 is provided with an argon bubble floating channel 6 at one end provided with an argon blowing ventilation element 3, and the argon blowing ventilation element 3 is arranged at the bottom of the argon bubble floating channel 6; the height of the argon bubble floating channel 6 is smaller than or equal to the height of the filter body 1; when the argon blowing ventilation element 3 is arranged at the molten steel inflow end 8 of the filter body 1, the top of the argon bubble floating channel 6 is communicated with the impact area; when the argon blowing ventilation element 3 is arranged at the molten steel outflow end 9 of the filter body 1, the top of the argon bubble floating channel is communicated with the pouring area.
Further, an adsorption layer is arranged on the inner surface of the inclusion adsorption filtration channel 2, and the adsorption layer is made of an adsorption material capable of adsorbing nonmetallic inclusion.
Further, the cross section of the inclusion adsorption filtration channel 2 is circular or quasi-circular; the longitudinal section of the inclusion adsorption filtration channel 2 is Z-shaped, S-shaped or L-shaped.
Further, the equivalent diameter of the inclusion adsorption and filtration channel 2 is 20-100 mm, the length of a single inclusion adsorption and filtration channel 2 is not less than 100mm, and at least one spoiler 5 is arranged in each inclusion adsorption and filtration channel 2.
Further, the inclusion adsorption filtration channel 2 is horizontally arranged or obliquely arranged outwards and upwards at a section close to the molten steel outflow end 9, and the included angle between the inclusion adsorption filtration channel and the horizontal plane is 0-150 degrees.
Further, at least one through molten steel channel 7 is arranged at the bottom of the filter body 1, the cross section of the through molten steel channel 7 is round, rectangular, round-like or rectangular-like, and one section of the through molten steel channel 7 close to the molten steel outflow end 9 is horizontally arranged or obliquely arranged outwards and upwards, and the included angle between the through molten steel channel 7 and the horizontal plane is 0-50 degrees.
Further, the argon blowing ventilation element 3 is a ventilation refractory material component which is prepared by mixing refractory material particles with different particle diameters with a bonding agent and then performing a cold isostatic pressing process, and is provided with dispersion type ventilation holes or straight-through micropores; the equivalent diameter of the dispersion type ventilation holes or the straight-through micropores is more than 0 and less than 2mm; the argon blowing ventilation member 3 is provided along the longitudinal direction of the filter body 1, and the width of the argon blowing ventilation member 3 is not less than 20mm.
According to the working method of the argon blowing and impurity sucking filter for the continuous casting tundish, in the continuous casting process, molten steel in an impact area in the tundish flows to a pouring area through the inclusion adsorption and filtration channel 2 and the through molten steel channel 7, impurities in the molten steel are adsorbed through an adsorption layer when the molten steel flows through the inclusion adsorption and filtration channel 2, turbulence is promoted through the turbulence block 5, so that the impurities in the molten steel collide with the inner surface of the channel, and the adsorption effect is improved; fine argon bubbles are generated by the argon blowing ventilation element 3 arranged at the molten steel inflow end 8 or the molten steel outflow end 9 of the filter body 1 to absorb and float upwards to remove impurities in molten steel; the molten steel after impurities are removed by adsorption and filtration of impurities through the adsorption layer and adsorption and floating of argon blowing flows into a pouring area.
The adsorption filter body 1 is made of refractory materials, and the cross section shapes of the inclusion adsorption filter channel 2 and the through molten steel channel 5 are difficult to be made into standard circles or rectangles in the preparation process, so that irregular circles or quasi-circles deformed on the basis of the circles and irregular rectangles or quasi-rectangles deformed on the basis of the rectangles are all within the protection range of the inclusion adsorption filter channel 2.
In order to make the purposes, technical schemes and technical effects of the embodiments of the present invention more clear, the technical schemes in the embodiments of the present invention will now be clearly and completely described. The embodiments described below are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without the benefit of the teachings of this invention, are intended to be within the scope of the invention.
[ example 1 ]
As shown in fig. 1a to 1c, in this embodiment, an argon blowing and gettering filter for a continuous casting tundish is applied to a tundish having a capacity of 65 tons, and includes a filter body 1, a inclusion adsorption filtration channel 2 and an argon blowing and breathing element 3. Wherein:
the filter body 1 and the argon blowing ventilation element 3 are of a composite structure, the argon blowing ventilation element is arranged at the molten steel outflow end 9 of the filter body 1, the argon bubble floating channel 6 of the argon blowing ventilation element 2 is arranged in the pouring area of the tundish, and the argon bubble floating channel 6 can be the full height (as shown in fig. 1 a-1 b) or the non-full height (as shown in fig. 1 c) which is smaller than the height of the filter body 1.
The argon blowing and impurity sucking filter is arranged at the lower part of the tundish retaining wall and is combined with the tundish retaining wall to divide the internal space of the tundish into an impact area and a pouring area. In the continuous casting process, molten steel is adsorbed and filtered from an impact area through an inclusion adsorption and filtration channel 2 and a direct molten steel channel 7, then the inclusion is adsorbed and floated through argon bubbles blown out of an argon blowing ventilation element 3, and finally flows into a pouring area through a bubble floating channel 6.
In this embodiment, the argon blowing ventilation element 3 is a ventilation refractory material component with dispersion ventilation holes, which is made by adding binding agent into refractory material particles with different particle diameters and cold isostatic pressing, and the inside of the argon blowing ventilation element is provided with an air inlet channel which is connected with an external air supply pipe 4, and the air supply pipe 4 is a high temperature resistant steel argon conveying pipeline.
In this embodiment, the equivalent diameter of the diffusion vent holes inside the argon blowing ventilation element 3 is not more than 2mm, the width of the argon blowing ventilation element 3 is 80mm, and the length is equal to the length of the filter body 1 (also the length of the tundish retaining wall). The argon blowing ventilation element 3 is used for providing a large number of tiny argon bubbles, fully absorbing impurities in molten steel, floating upwards and removing the impurities, effectively removing the tiny impurities below 50 mu m in the molten steel, and better improving the cleanliness of the molten steel.
In this embodiment, 14 impurity adsorption and filtration channels 2 are provided in the filter body 1, and a layer of adsorption material capable of adsorbing nonmetallic impurities is compounded on the inner surface of the impurity adsorption and filtration channels 2. The cross section of the inclusion adsorption filtration channel 2 is circular, and the equivalent diameters are respectively
Several specifications. The longitudinal section of the impurity adsorbing and filtering channels 2 is Z-shaped, and each impurity adsorbing and filtering channel 2 is arranged at one end close to the molten steel inflow end 9A rectangular parallelepiped spoiler 5 was placed, and the length of the single inclusion adsorption filter passage 2 was about 300mm. The section of the inclusion adsorption filtration channel 2 near the molten steel outflow end 9 is communicated with the argon bubble floating channel 6, and the inclusion adsorption filtration channel 2 is inclined outwards and upwards, and the included angle between the inclusion adsorption filtration channel and the horizontal plane is 10 degrees.
4 through molten steel channels 7 are arranged at intervals at the bottom of the filter body 1, one section of the full-height through molten steel channel 7 (shown in fig. 1a and 1 b) close to the molten steel outflow end 9 extends to the other end of the argon bubble floating channel (namely, the middle is disconnected), and the section of the through molten steel channel 7 inclines outwards and upwards and forms an included angle of 30 degrees with the horizontal plane. For the non-full height type through molten steel channel 7 (as shown in fig. 1 c), a section of the through molten steel channel 7 near the molten steel outflow end 9 is directly communicated with the argon bubble floating channel 6, and the rest of the through molten steel channel 7 is horizontally arranged. The two ends of the inclusion adsorption and filtration channel 2 and the straight molten steel channel 7 are respectively communicated with an impact area and a pouring area of the tundish.
[ example 2 ]
As shown in fig. 2a to 2c, in this embodiment, an argon blowing and gettering filter for a continuous casting tundish is applied to a tundish having a capacity of 65 tons, and includes a filter body 1, a foreign material adsorbing and filtering passage 2, and an argon blowing and ventilating member 3. Wherein:
the filter body 1 and the argon blowing ventilation element 3 are of a composite structure, the argon blowing ventilation element is arranged at the molten steel inflow end 8 of the filter body 1, the argon bubble floating channel 6 of the argon blowing ventilation element 2 is arranged in the impact area of the tundish, and the argon bubble floating channel 6 can be the full height (as shown in fig. 2 a-2 b) or the non-full height (as shown in fig. 2 c) which is smaller than the height of the filter body 1.
The argon blowing and impurity sucking filter is arranged at the lower part of the tundish retaining wall and is combined with the tundish retaining wall to divide the internal space of the tundish into an impact area and a pouring area. In the continuous casting process, molten steel firstly enters an argon bubble floating channel 6 from an impact area, impurities are adsorbed and floating through argon bubbles blown out by an argon blowing ventilation element 3, then are adsorbed and filtered through an impurity adsorption and filtration channel 2 and a direct molten steel channel 7, and finally flow into a pouring area.
In this embodiment, the argon blowing ventilation element 3 is a ventilation refractory material component with dispersion ventilation holes, which is made by adding binding agent into refractory material particles with different particle diameters and cold isostatic pressing, and the inside of the argon blowing ventilation element is provided with an air inlet channel which is connected with an external air supply pipe 4, and the air supply pipe 4 is a high temperature resistant steel argon conveying pipeline.
In this embodiment, the equivalent diameter of the diffusion vent holes inside the argon blowing ventilation element 3 is not more than 2mm, the width of the argon blowing ventilation element 3 is 70mm, and the length is equal to the length of the filter body 1 (also the length of the tundish retaining wall). The argon blowing ventilation element 3 is used for providing a large number of tiny argon bubbles, fully absorbing impurities in molten steel, floating upwards and removing the impurities, effectively removing the tiny impurities below 50 mu m in the molten steel, and better improving the cleanliness of the molten steel.
In this embodiment, 14 impurity adsorption and filtration channels 2 are provided in the filter body 1, and a layer of adsorption material capable of adsorbing nonmetallic impurities is compounded on the inner surface of the impurity adsorption and filtration channels 2. The cross section of the inclusion adsorption filtration channel 2 is circular, and the equivalent diameters are respectively
Several specifications. The longitudinal section of the inclusion adsorption and filtration channels 2 is Z-shaped, each inclusion adsorption and filtration channel 2 is provided with a turbulence block 5 with a semicircular cross section at one end close to the molten steel inflow end 9, and the length of each single inclusion adsorption and filtration channel 2 is about 320mm. The section of the inclusion adsorption filtration channel 2 near the molten steel inflow end 8 is communicated with the argon bubble floating channel 6, and the inclusion adsorption filtration channel 2 is inclined upwards and outwards, and the included angle between the inclusion adsorption filtration channel 2 and the horizontal plane is 40 degrees.
4 through molten steel channels 7 are arranged at intervals at the bottom of the filter body 1, one section of the full-height through molten steel channel 7 (shown in fig. 2a and 2 b) close to the molten steel inflow end 8 extends to the other end (namely, the middle of the argon bubble floating channel 6 is disconnected), and the section of the through molten steel channel 7 inclines outwards and upwards and forms an included angle of 30 degrees with the horizontal plane. For the non-full height type through molten steel channel 7 (as shown in fig. 2 c), a section of the through molten steel channel 7 near the molten steel inflow end 8 is directly communicated with the argon bubble floating channel 6, and the rest of the through molten steel channel 7 is horizontally arranged. The two ends of the inclusion adsorption and filtration channel 2 and the straight molten steel channel 7 are respectively communicated with an impact area and a pouring area of the tundish.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. An argon blowing and impurity sucking filter for a continuous casting tundish is provided with a tundish retaining wall, and the inner space of the continuous casting tundish is divided into an impact area and a pouring area; the argon blowing and impurity sucking filter is arranged at the lower part of the retaining wall of the tundish and consists of a filter body, an impurity adsorbing and filtering channel and an argon blowing and ventilating element; the impurity adsorption and filtration channels are arranged in the filter body, and two ends of the impurity adsorption and filtration channels are respectively communicated with the impact area and the pouring area; the argon blowing ventilation element is arranged in the filter body and positioned at the molten steel inflow end or the molten steel outflow end, and an air inlet channel is arranged in the argon blowing ventilation element and is connected with an external air supply pipe.
2. The argon blowing and impurity sucking filter for continuous casting tundish according to claim 1, wherein the argon blowing and impurity sucking filter and a tundish retaining wall are of a composite structure; in the argon blowing and gettering filter, a filter body and an argon blowing and breathing element are of a composite structure.
3. The argon blowing and gettering filter for continuous casting tundish according to claim 1, wherein the filter body is further provided with an argon bubble floating channel at one end provided with an argon blowing and gettering element, and the argon blowing and gettering element is arranged at the bottom of the argon bubble floating channel; the height of the argon bubble floating channel is smaller than or equal to the height of the filter body; when the argon blowing ventilation element is arranged at the molten steel inflow end of the filter body, the top of the argon bubble floating channel is communicated with the impact area; when the argon blowing ventilation element is arranged at the molten steel outflow end of the filter body, the top of the argon bubble floating channel is communicated with the pouring area.
4. The argon blowing and impurity sucking filter for continuous casting tundish according to claim 1, wherein the inner surface of the inclusion adsorption and filtration channel is provided with an adsorption layer which is composed of an adsorption material capable of adsorbing nonmetallic inclusion.
5. An argon blowing and gettering filter for a continuous casting tundish according to claim 1, wherein the cross-sectional shape of the inclusion adsorption filtration channel is circular or quasi-circular; the longitudinal section of the inclusion adsorption filtration channel is Z-shaped, S-shaped or L-shaped.
6. The argon blowing and impurity sucking filter for continuous casting tundish according to claim 1, wherein the equivalent diameter of the impurity adsorbing and filtering channel is 20-100 mm, the length of a single impurity adsorbing and filtering channel is not less than 100mm, and at least one turbulence block is arranged in each impurity adsorbing and filtering channel.
7. The argon blowing and gettering filter for continuous casting tundish according to claim 1, wherein the inclusion adsorption filtration channel is horizontally arranged at a section close to the outflow end of molten steel or inclined upward and outward, and has an included angle of 0 ° to 150 ° with the horizontal plane.
8. The argon blowing and impurity sucking filter for continuous casting tundish according to claim 1, wherein the bottom of the filter body is at least provided with one through molten steel channel, the cross section of the through molten steel channel is round, rectangular, round-like or rectangular-like, and a section of the through molten steel channel close to the molten steel outflow end is horizontally arranged or obliquely arranged outwards and upwards, and the included angle between the through molten steel channel and the horizontal plane is 0-50 degrees.
9. The argon blowing and gettering filter for continuous casting tundish according to claim 1, wherein the argon blowing and gettering element is a gas permeable refractory member having dispersion type ventilation holes or through micropores, which is formed by mixing refractory particles having different particle diameters with a binder and then performing a cold isostatic pressing process; the equivalent diameter of the dispersion type ventilation holes or the straight-through micropores is more than 0 and less than 2mm; the argon blowing ventilation element is arranged along the longitudinal through length of the filter body, and the width of the argon blowing ventilation element is not less than 20mm.
10. The method according to any one of claims 1 to 9, wherein in the continuous casting process, molten steel in an impact zone in the tundish flows to a casting zone through an inclusion adsorption filtration channel and a straight molten steel channel, and impurities in the molten steel are adsorbed by an adsorption layer when the molten steel flows through the inclusion adsorption filtration channel, turbulence is promoted by a turbulence block to enable the impurities in the molten steel to collide with the inner surface of the channel, so that the adsorption effect is improved; fine argon bubbles are generated by an argon blowing ventilation element arranged at the molten steel inflow end or the molten steel outflow end of the filter body to absorb and float upwards to remove impurities in the molten steel; the molten steel after impurities are removed by adsorption and filtration of impurities through the adsorption layer and adsorption and floating of argon blowing flows into a pouring area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211576349.0A CN116079040A (en) | 2022-12-09 | 2022-12-09 | Argon blowing and impurity sucking filter for continuous casting tundish and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211576349.0A CN116079040A (en) | 2022-12-09 | 2022-12-09 | Argon blowing and impurity sucking filter for continuous casting tundish and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116079040A true CN116079040A (en) | 2023-05-09 |
Family
ID=86209292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211576349.0A Pending CN116079040A (en) | 2022-12-09 | 2022-12-09 | Argon blowing and impurity sucking filter for continuous casting tundish and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116079040A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260094A (en) * | 2011-07-19 | 2011-11-30 | 武汉科技大学 | Preparation method of diffuse type permeable material |
| CN102728827A (en) * | 2012-07-23 | 2012-10-17 | 武汉钢铁(集团)公司 | Continuous casting tundish capable of improving molten steel cleanliness |
| CN204396818U (en) * | 2014-12-17 | 2015-06-17 | 谢玉红 | Tundish filtration, gettering current divider |
| CN107321945A (en) * | 2017-07-14 | 2017-11-07 | 山东钢铁股份有限公司 | A kind of method of purging upper nozzle for continuous casting tundish brick cup Argon removal of inclusions |
| CN207982293U (en) * | 2018-03-08 | 2018-10-19 | 台安益兴科技有限公司 | Molten metal tundish |
| CN110744036A (en) * | 2018-07-24 | 2020-02-04 | 宝山钢铁股份有限公司 | Tundish air curtain weir argon blowing inclusion removing device |
| US20210053111A1 (en) * | 2019-08-19 | 2021-02-25 | Harbisonwalker International, Inc. | Diffusion article |
-
2022
- 2022-12-09 CN CN202211576349.0A patent/CN116079040A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260094A (en) * | 2011-07-19 | 2011-11-30 | 武汉科技大学 | Preparation method of diffuse type permeable material |
| CN102728827A (en) * | 2012-07-23 | 2012-10-17 | 武汉钢铁(集团)公司 | Continuous casting tundish capable of improving molten steel cleanliness |
| CN204396818U (en) * | 2014-12-17 | 2015-06-17 | 谢玉红 | Tundish filtration, gettering current divider |
| CN107321945A (en) * | 2017-07-14 | 2017-11-07 | 山东钢铁股份有限公司 | A kind of method of purging upper nozzle for continuous casting tundish brick cup Argon removal of inclusions |
| CN207982293U (en) * | 2018-03-08 | 2018-10-19 | 台安益兴科技有限公司 | Molten metal tundish |
| CN110744036A (en) * | 2018-07-24 | 2020-02-04 | 宝山钢铁股份有限公司 | Tundish air curtain weir argon blowing inclusion removing device |
| US20210053111A1 (en) * | 2019-08-19 | 2021-02-25 | Harbisonwalker International, Inc. | Diffusion article |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113564309B (en) | Tundish with function of removing molten steel inclusions by blowing argon | |
| KR101087318B1 (en) | Method for manufacture of ultra-low carbon steel slab | |
| CN102294454A (en) | Arrangement structure of immerged water inlets for special blank crystallizer | |
| CN116079040A (en) | Argon blowing and impurity sucking filter for continuous casting tundish and working method thereof | |
| CN207982293U (en) | Molten metal tundish | |
| CN202270949U (en) | Submersed nozzle for beam blank continuous casting mould | |
| CN219025868U (en) | Inclusion adsorption filter for continuous casting tundish | |
| CN203292475U (en) | Four-hole type submersed nozzle used for FTSC sheet billet continuous casting crystallizer with high pulling speed | |
| JP3525894B2 (en) | Steel continuous casting method | |
| CN111496242A (en) | Turbulent flow type aluminum alloy melt deslagging and filtering device and using method thereof | |
| JP5130490B2 (en) | Immersion nozzle | |
| CN103231048A (en) | Four-hole submerged nozzle for high-casting-speed flexible thin slab caster (FTSC) crystallizer | |
| CN219025847U (en) | Valve body casting system | |
| WO2023185874A1 (en) | Method and apparatus for reducing fine inclusions in molten steel | |
| JP2008087065A (en) | Tundish for continuous casting | |
| JP2006198655A (en) | Porous immersion nozzle, and continuous casting method using the same | |
| CN112846087B (en) | Filter type pouring cup and sand box | |
| KR101062953B1 (en) | Immersion nozzle | |
| CN214023376U (en) | Aluminum liquid degassing device used before aluminum strip casting and rolling | |
| JPS62197251A (en) | Tundish for continuous casting | |
| WO2023210201A1 (en) | Tundish and continuous casting method using same | |
| JP4319072B2 (en) | Tundish with excellent inclusion levitation | |
| CN219093577U (en) | Tundish bottom argon blowing device for copper alloy | |
| CN211963246U (en) | Foam ceramic filter for preventing blocking of large-block impurities | |
| CN112247136B (en) | Tundish short-distance jet flow long nozzle structure and argon blowing smelting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |