CN115786641B - Device and method for alloying rare earth metal in molten steel - Google Patents
Device and method for alloying rare earth metal in molten steel Download PDFInfo
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- CN115786641B CN115786641B CN202211358801.6A CN202211358801A CN115786641B CN 115786641 B CN115786641 B CN 115786641B CN 202211358801 A CN202211358801 A CN 202211358801A CN 115786641 B CN115786641 B CN 115786641B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 126
- 239000010959 steel Substances 0.000 title claims abstract description 126
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 88
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005275 alloying Methods 0.000 title claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 53
- 239000000956 alloy Substances 0.000 claims abstract description 53
- 238000007598 dipping method Methods 0.000 claims abstract description 29
- 239000002893 slag Substances 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011449 brick Substances 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 claims description 5
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 4
- GSVIBLVMWGSPRZ-UHFFFAOYSA-N cerium iron Chemical compound [Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Ce].[Ce] GSVIBLVMWGSPRZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- 238000003723 Smelting Methods 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 22
- 229910018516 Al—O Inorganic materials 0.000 description 13
- 238000007654 immersion Methods 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
An alloying device of rare earth metal in molten steel, which belongs to the field of iron and steel smelting and metal material preparation; comprises a molten steel tank for placing molten steel; the bin is used for placing rare earth alloy; the bottom of the molten steel tank is provided with an air brick module which can blow slag on the surface of molten steel open; an ANS dipping cover module for separating molten steel surface slag blown by the air brick module; the control arm module is used for controlling the bin to penetrate through the ANS dipping cover module and enter the molten steel through blowing off surface slag; the air brick module uniformly stirs molten steel of a bin for containing rare earth alloy to obtain molten steel with the rare earth content reaching the standard and uniform rare earth, solves the problem that the rare earth alloy has high oxidation speed and low alloy yield in the process of adding the rare earth alloy into the molten steel, and can realize stable addition of rare earth elements into the molten steel.
Description
Technical Field
The invention relates to the field of steel smelting and metal material preparation, in particular to a device and a method for alloying rare earth metals in molten steel.
Background
The rare earth metal has the functions of refining inclusion, grain refinement, improvement of mechanical property, corrosion resistance and the like of steel in molten steel, but has extremely strong reducibility, and is easy to react with oxygen to form rare earth oxide or react with nonmetallic inclusion in molten steel to form composite oxide.
The rare earth metal has extremely strong reducibility, and is extremely easy to be oxidized into rare earth oxide in molten steel or react with nonmetallic inclusion in molten steel to generate composite oxide, so that stable control of the rare earth content in molten steel in a smelting process flow is a key link for realizing the action effect of the rare earth element in the steel. However, the related patents of the rare earth alloying method, which relate to the main focusing of molten steel added with rare earth and the positive influence of the added rare earth on the steel performance, are not reported in the domestic reported patents.
Disclosure of Invention
The invention aims to solve the problems of high rare earth alloy oxidation speed and low alloy yield in the process of adding rare earth alloy into molten steel, and provides the technical scheme adopted by the invention that: an alloying device for rare earth metals in molten steel comprises a molten steel tank for placing molten steel;
The bin is used for placing rare earth alloy;
the bottom of the molten steel tank is provided with an air brick module which can blow slag on the surface of molten steel open;
An ANS dipping cover module for separating molten steel surface slag blown by the air brick module;
The control arm module is used for controlling the bin to penetrate through the ANS dipping cover module and enter the molten steel through blowing off surface slag;
the air brick module uniformly stirs molten steel of a bin for accommodating rare earth alloy to obtain molten steel with the rare earth content reaching the standard and uniform rare earth components.
Further: the control arm module comprises a connecting rod and a speed reducer for controlling the lifting of the connecting rod.
Further: the bin is a hollowed-out chamber or a closed cabin, and the hollowed-out chamber or the closed cabin is made of metal iron.
Further: the rare earth alloy adopts cerium-iron alloy.
Further: the rare earth content reaches the standard that the rare earth content in molten steel reaches 100-300 ppm.
A treatment method of a device for alloying rare earth metals in molten steel comprises the following steps:
deoxidizing and desulfurizing the molten steel to reduce the oxygen content in the molten steel after deoxidizing and desulfurizing to below 15ppm and the sulfur content to below 20 ppm;
placing the rare earth alloy into a bin;
the air brick module adopts a bottom blowing process to discharge slag on the surface of the molten steel tank to the vicinity of the wall of the molten steel tank;
The ANS dipping cover module descends to the surface of the molten steel to ensure that more than 90 percent of slag on the surface of the molten steel is discharged outside the dipping cover;
And immersing the storage bin into molten steel, and fully stirring through the air brick module to ensure that the rare earth alloy in the storage bin is fully melted, and controlling the arm to ascend to complete the rare earth alloying process.
Further: the stirring is performed by argon blowing for 3min.
The invention provides a device for alloying rare earth metal in molten steel, which is a rare earth alloy adding device with stable rare earth yield, and has the following advantages: the method solves the problem of contact between the rare earth metal and the slag by adopting an ANS procedure adding and pressing-in mode, avoids the reaction between the rare earth metal and the slag, solves the problem of high oxidation speed and low alloy yield of the rare earth alloy in the process of adding the rare earth alloy into molten steel, and can realize stable addition of the rare earth element into the molten steel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic illustration of the present apparatus;
FIG. 2 is an electron image of Ce-Al-O inclusion;
FIG. 3 is an EDS layering diagram of Ce-Al-O inclusions;
FIG. 4 is a CaK.alpha.1 diagram of a Ce-Al-O inclusion;
FIG. 5 is an AlK.alpha.1 diagram of a Ce-Al-O inclusion;
FIG. 6 is a CeLα1 diagram of a Ce-Al-O inclusion;
FIG. 7 is a O K. Alpha.1 diagram of a Ce-Al-O inclusion;
FIG. 8 is an electron image of Ce-O-S inclusion;
FIG. 9 is a CeLα1 diagram of a Ce-O-S inclusion;
FIG. 10 is a O K. Alpha.1 diagram of a Ce-O-S inclusion;
FIG. 11 is a S K. Alpha.1 diagram of a Ce-O-S inclusion;
FIG. 12 is a view of FeKα1 of a Ce-O-S inclusion;
FIG. 13 is a CaK.alpha.1 diagram of a Ce-O-S inclusion;
FIG. 14 is an AlKα1 diagram of a Ce-O-S inclusion;
FIG. 15 is a SiKα1 diagram of a Ce-O-S inclusion.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other, and the present invention will be described in detail below with reference to the drawings and the embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent 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 exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for 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. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
FIG. 1 is a schematic illustration of the present apparatus;
the device for alloying the rare earth metal in the molten steel comprises a molten steel tank, a storage bin, an air brick module and a control arm module;
the molten steel tank is used for placing molten steel; the liquid level of the molten steel is at least 500mm from the bottom of the molten steel tank;
The bin is used for placing rare earth alloy; the volume of the storage bin is 1-4 m 3;
the air brick module is arranged at the bottom of the molten steel tank; the air brick module can blow slag on the surface of molten steel open; the air brick is a slit air brick, and is a general smelting device
The ANS dipping cover module is used for isolating molten steel surface slag blown by the air brick module;
The ANS immersion hood module comprises an immersion hood positioned at the lower part and a connecting part positioned at the upper part;
A steel cover of a refractory material is laid on the inner wall of the immersion cover;
The connecting part is also arranged in an opening way; the connecting part is a cylindrical shell;
the dipping cover is in solid connection with the upper connecting part, and the opening area of the dipping cover is smaller than that of the molten steel tank, so that the dipping cover is immersed into molten steel conveniently;
the vertical distance from the lower cover body immersed in the molten steel to the liquid level is at least 500mm;
the control arm module is used for controlling the bin to penetrate through the ANS dipping cover module and enter the molten steel through blowing off surface slag; the control distance of the control arm module is 3-5 m;
the air brick module uniformly stirs molten steel of a bin for accommodating rare earth alloy to obtain molten steel with the rare earth content reaching the standard and uniform rare earth.
The control arm module comprises a connecting rod and a speed reducer for controlling the lifting of the connecting rod; the model of the speed reducer is YZR200L-6; rated voltage 380V, rated current 42-50A and power 20-30 kW;
one end of the connecting rod is connected with a speed reducer for controlling the lifting of the connecting rod;
the other end of the connecting rod is connected with the stock bin;
the bin is a hollowed-out cavity or a sealed cabin, and the hollowed-out cavity or the sealed cabin is made of metal iron.
The hollow cavity can be grid-shaped or grid-shaped;
when the silo is a sealed chamber, the thickness of the chamber wall is 50mm;
the massive rare earth alloy is arranged in an iron cavity and is pressed into molten steel by a control arm;
Further, the rare earth alloy adopts cerium-iron alloy, wherein the cerium content is 20 percent, and the iron content is 80 percent;
further: the rare earth content reaches 100-300 ppm in molten steel, the rare earth alloy (cerium-iron alloy) can effectively improve the appearance of inclusions, and enable larger alumina inclusions in casting blanks to be converted into finer Ce-Al-O, ce-O-S inclusions, so that the purposes of improving the corrosion resistance and impact toughness of materials are achieved.
FIG. 2 is an electron image of Ce-Al-O inclusion;
FIG. 3 is an EDS layering diagram of Ce-Al-O inclusions;
FIG. 4 is a CaK.alpha.1 diagram of a Ce-Al-O inclusion;
FIG. 5 is an AlK.alpha.1 diagram of a Ce-Al-O inclusion;
FIG. 6 is a CeLα1 diagram of a Ce-Al-O inclusion;
FIG. 7 is a O K. Alpha.1 diagram of a Ce-Al-O inclusion;
FIG. 8 is an electron image of Ce-O-S inclusion;
FIG. 9 is a CeLα1 diagram of a Ce-O-S inclusion;
FIG. 10 is a O K. Alpha.1 diagram of a Ce-O-S inclusion;
FIG. 11 is a S K. Alpha.1 diagram of a Ce-O-S inclusion;
FIG. 12 is a view of FeKα1 of a Ce-O-S inclusion;
FIG. 13 is a CaK.alpha.1 diagram of a Ce-O-S inclusion;
FIG. 14 is an AlKα1 diagram of a Ce-O-S inclusion;
FIG. 15 is a SiKα1 diagram of a Ce-O-S inclusion.
A treatment method of a device for alloying rare earth metals in molten steel comprises the following steps:
s1, deoxidizing and desulfurizing molten steel to reduce the oxygen content in the deoxidized and desulfurized molten steel to below 15ppm and the sulfur content to below 20 ppm;
S2: placing the rare earth alloy into a bin;
s3, the air brick module discharges slag on the surface of the molten steel tank to the vicinity of the wall of the molten steel tank by adopting a bottom blowing process;
S4, the ANS dipping cover module is lowered to the surface of the molten steel, so that more than 90% of slag on the surface of the molten steel is discharged outside the dipping cover; the ANS dipping cover module descends to the surface of molten steel, and more than 90% of slag on the surface of the molten steel is discharged outside the dipping cover through air blowing of air bricks, so that the prior art is provided;
And S5, immersing the storage bin into molten steel, and fully stirring through the air brick module to ensure that the rare earth alloy in the storage bin is fully melted, and controlling the arm module to ascend to complete the rare earth alloying process.
Steps S1, S2, S3, S4, S5 are sequentially performed;
the stirring is carried out by blowing argon for 3min.
Implementation example one:
producing low-silicon aluminum killed steel and scrap steel 28t, molten iron 180t,1356 ℃, and the molten iron comprises the following components:
step one: before the ANS is added with the rare earth alloy, the molten steel is subjected to deoxidation and desulfurization treatment, so that the oxygen content in the molten steel is reduced to 13ppm and the sulfur content is reduced to 15ppm before the alloy is added;
Step two: adding rare earth alloy into an ANS dipping cover with a control arm module;
Step three: placing the rare earth alloy into a bin at the lower part of a control arm module;
Step four: the bottom blowing technology is adopted, slag on the surface of the molten steel tank is discharged to the vicinity of the tank wall through the air brick module, the ANS dipping cover module is lowered to the surface of the molten steel, and more than 90% of slag on the surface of the molten steel is discharged outside the dipping cover;
Step five: the control arm module descends, the bin is immersed into molten steel, argon is blown and stirred for 3min, and the rare earth alloy in the bin is guaranteed to be fully melted;
step six: and controlling the arm module to rise to finish the rare earth alloying process, and the alloy yield is 45.6%.
Implementation example two:
the steel grade is Q235B, the scrap steel is 26t, molten iron is 181t and 1354 ℃, and the molten iron comprises the following components:
step one: before the ANS is added with the rare earth alloy, the molten steel is subjected to deoxidation and desulfurization treatment, so that the oxygen content in the molten steel is reduced to 12ppm and the sulfur content is reduced to 14ppm before the alloy is added;
Step two: adding rare earth alloy into an ANS immersion hood module with a control arm module;
Step three: placing the rare earth alloy into a bin at the lower part of a control arm module;
Step four: discharging slag on the surface of the molten steel tank to the vicinity of the tank wall by adopting a bottom blowing process, and lowering an ANS dipping cover module to the surface of the molten steel to ensure that more than 90% of slag on the surface of the molten steel is discharged outside the dipping cover;
Step five: the arm is controlled to descend, the bin is immersed into molten steel, argon is blown and stirred for 3min, and the rare earth alloy in the bin is guaranteed to be fully melted;
Step six: the control arm is lifted to finish the rare earth alloying process, and the alloy yield is 47.8%.
Implementation example three:
Producing low-silicon aluminum killed steel, scrap steel 29t, molten iron 182t,1366 ℃, and the molten iron comprises the following components:
Step one: before the ANS is added with the rare earth alloy, the molten steel is subjected to deoxidation and desulfurization treatment, so that the oxygen content in the molten steel is reduced to 12ppm and the sulfur content is reduced to 16ppm before the alloy is added;
Step two: addition of rare earth alloys in an ANS immersion hood with control arm module
Step three: placing the rare earth alloy into a bin at the lower part of a control arm module;
step four: discharging slag on the surface of the molten steel tank to the vicinity of the tank wall through an air brick module by adopting a bottom blowing process, and lowering an ANS dipping cover to the surface of the molten steel to ensure that more than 90% of slag on the surface of the molten steel is discharged outside the dipping cover;
Step five: the control arm module descends, the bin is immersed into molten steel, argon is blown and stirred for 3min, and the rare earth alloy in the bin is guaranteed to be fully melted;
Step six: and controlling the arm module to rise to finish the rare earth alloying process, and the alloy yield is 52.3%.
Implementation example four:
steel grade Q235B was produced. 30.5t of scrap steel, 178 t of molten iron, 1361 ℃ and the following molten iron components:
Step one: before the ANS is added with the rare earth alloy, the molten steel is subjected to deoxidation and desulfurization treatment, so that the oxygen content in the molten steel is reduced to 12.5ppm and the sulfur content is reduced to 14.4ppm before the alloy is added;
step two: adding rare earth alloy into an ANS dipping cover with a control arm;
Step three: placing the rare earth alloy into a bin at the lower part of a control arm module;
Step four: discharging slag on the surface of the molten steel tank to the vicinity of the tank wall through an air brick module by adopting a bottom blowing process, and lowering an ANS dipping cover to the surface of the molten steel to ensure that more than 90% of slag on the surface of the molten steel is discharged outside the dipping cover;
Step five: the control arm module descends, the bin is immersed into molten steel, argon is blown and stirred for 3min, and the rare earth alloy in the bin is guaranteed to be fully melted;
step six: and controlling the arm module to rise to finish the rare earth alloying process, and the alloy yield is 48.2%.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (3)
1. A method for alloying rare earth metals in molten steel is characterized in that: a device for alloying rare earth metals in molten steel, wherein the device for alloying rare earth metals in molten steel comprises a molten steel tank for placing molten steel;
The bin is used for placing rare earth alloy;
the bottom of the molten steel tank is provided with an air brick module which can blow slag on the surface of molten steel open;
An ANS dipping cover module for separating molten steel surface slag blown by the air brick module;
The control arm module is used for controlling the bin to penetrate through the ANS dipping cover module and enter the molten steel through blowing off surface slag;
The air brick module uniformly stirs molten steel of a bin for accommodating rare earth alloy to obtain molten steel with the rare earth content reaching the standard and uniform rare earth components;
the control arm module comprises a connecting rod and a speed reducer for controlling the lifting of the connecting rod;
The bin is a hollowed-out chamber or a closed cabin, and the hollowed-out chamber or the closed cabin is made of metal iron;
the rare earth alloy adopts cerium-iron alloy;
the processing method based on the device comprises the following steps:
deoxidizing and desulfurizing the molten steel to reduce the oxygen content in the molten steel after deoxidizing and desulfurizing to below 15ppm and the sulfur content to below 20 ppm;
placing the rare earth alloy into a bin;
the air brick module adopts a bottom blowing process to discharge slag on the surface of the molten steel tank to the vicinity of the wall of the molten steel tank;
The ANS dipping cover module descends to the surface of the molten steel to ensure that more than 90 percent of slag on the surface of the molten steel is discharged outside the dipping cover;
And immersing the storage bin into molten steel, and fully stirring through the air brick module to ensure that the rare earth alloy in the storage bin is fully melted, and controlling the arm to ascend to complete the rare earth alloying process.
2. The method for alloying rare earth metals in molten steel according to claim 1, wherein: the rare earth content reaches the standard that the rare earth content in molten steel reaches 100-300 ppm.
3. The method for alloying rare earth metals in molten steel according to claim 1, wherein: the stirring is performed by argon blowing for 3min.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10287911A (en) * | 1997-04-15 | 1998-10-27 | Nippon Steel Corp | Method for smelting high-cleanliness steel |
| CN1475580A (en) * | 2003-07-18 | 2004-02-18 | 钢铁研究总院 | Rare earth addition quantity optimization and control method of rare earth weather resistant steel |
| CN102373314A (en) * | 2011-11-03 | 2012-03-14 | 内蒙古包钢钢联股份有限公司 | Method for adding rare earth into steel ladle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10287911A (en) * | 1997-04-15 | 1998-10-27 | Nippon Steel Corp | Method for smelting high-cleanliness steel |
| CN1475580A (en) * | 2003-07-18 | 2004-02-18 | 钢铁研究总院 | Rare earth addition quantity optimization and control method of rare earth weather resistant steel |
| CN102373314A (en) * | 2011-11-03 | 2012-03-14 | 内蒙古包钢钢联股份有限公司 | Method for adding rare earth into steel ladle |
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| CN115786641A (en) | 2023-03-14 |
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