CN115574554A - Lime powder drying device, converter and lime powder blowing method - Google Patents
Lime powder drying device, converter and lime powder blowing method Download PDFInfo
- Publication number
- CN115574554A CN115574554A CN202211186196.9A CN202211186196A CN115574554A CN 115574554 A CN115574554 A CN 115574554A CN 202211186196 A CN202211186196 A CN 202211186196A CN 115574554 A CN115574554 A CN 115574554A
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- lime powder
- converter
- powder
- induction coil
- water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
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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
- Y02P10/25—Process efficiency
Abstract
The invention particularly relates to a lime powder drying device, a converter and a lime powder injection method, and belongs to the field of converter steelmaking. A lime powder drying apparatus comprising: the water-cooling induction coil is used for preheating lime powder to be sprayed into the converter; and the power supply is used for being connected with the water-cooling induction coil. The water-cooling induction coil and the power supply are arranged, and the power supply is used for providing electric energy for the water-cooling induction coil, so that the water-cooling induction coil preheats lime powder to be sprayed into the converter, the humidity of the lime powder is effectively reduced, the fluidity of the lime powder is improved, the lime powder is prevented from being adhered to a conveying pipeline, the adaptability of a bottom powder spraying process to the lime powder is greatly enhanced, and the spraying speed of the converter is improved; and the hot lime powder can improve the heat of a molten pool and further improve the dephosphorization efficiency.
Description
Technical Field
The invention belongs to the field of converter steelmaking, and particularly relates to a lime powder drying device, a converter and a lime powder injection method.
Background
A smelting process of oxygen and lime powder blown from the bottom of a converter is a steelmaking method for conveying lime powder to a molten pool by using oxygen as carrier gas at the bottom of the converter, and is called bottom powder spraying process for short. The method has the advantages of good dephosphorization effect, difficult splashing, lime saving, low end point carbon-oxygen product, low slag T.Fe and the like. However, when the method is adopted, the problem of blockage of a powder conveying pipeline is easy to occur, and the difficulty is caused to the steelmaking process of bottom blowing of the lime powder.
Disclosure of Invention
The application aims to provide a lime powder drying device, a converter and a lime powder injection method, and aims to solve the technical problem that when bottom powder injection is adopted in the existing converter, lime powder blocks a powder conveying pipeline.
The embodiment of the invention provides a lime powder drying device, which comprises:
the water-cooling induction coil is used for preheating lime powder to be sprayed into the converter;
and the power supply is used for being connected with the water-cooling induction coil.
Optionally, the water-cooling induction coil is wound on the outer side of the spraying part of the lime powder spraying tank.
Based on the same inventive concept, the embodiment of the invention also provides a converter, which comprises:
a converter body;
the lime powder injection tank is used for injecting lime powder into the converter body;
the lime powder drying device is used for preheating lime powder to be sprayed into the converter body, and the water-cooling induction coil is wound on the outer side of the spraying part of the lime powder spraying tank.
Optionally, the spraying part is arranged at the bottom of the lime powder spraying tank and is in an inverted cone shape, and the winding height of the water-cooling induction coil is the same as the height of the spraying part.
Optionally, the injection part is communicated with the converter body through a powder conveying pipe, and the powder conveying pipe is sleeved with a heat insulation sleeve.
Optionally, a valve is arranged at one end of the powder conveying pipe close to the spraying part.
Based on the same invention concept, the embodiment of the invention also provides a lime powder injection method, which is suitable for any electric furnace and comprises the following steps:
placing lime powder in the lime powder injection tank;
heating the spraying part by adopting the water-cooling induction coil to obtain dry lime powder;
and spraying the dry lime powder into the converter body in a bottom powder spraying mode.
Optionally, the heating power of the water-cooling induction coil is 30-100kW, and the heating temperature is 100-300 ℃.
Optionally, the particle size of the dry lime powder is 20-200 meshes, and the humidity of the dry lime powder is 0-3%.
Optionally, the method further comprises the following steps:
to the converter bodyBottom-blown oxygen having an intensity of 0.1-5Nm 3 /t/min。
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
according to the lime powder drying device provided by the embodiment of the invention, the water-cooling induction coil and the power supply are arranged, and the power supply is used for providing electric energy for the water-cooling induction coil, so that the water-cooling induction coil preheats lime powder to be sprayed into the converter, the humidity of the lime powder is effectively reduced, the fluidity of the lime powder is improved, the lime powder is prevented from being adhered to a conveying pipeline, the adaptability of a bottom powder spraying process to the lime powder is greatly enhanced, and the spraying speed of the converter is improved; and the hot lime powder can improve the heat of a molten pool and further improve the dephosphorization efficiency.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic illustration of an electric fire provided by an embodiment of the present invention;
fig. 2 is a flow chart of a method provided by an embodiment of the invention.
Reference numerals are as follows:
10-water-cooling induction coil; 20-a converter body; 21-a lime powder injection tank; 211-an ejection section; 22-a powder conveying pipe; 23-insulating sleeve; 24-a valve; 25-bottom blowpipe.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are illustrative of the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. For example, room temperature may refer to a temperature in the interval 10 to 35 ℃.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
referring to fig. 1, according to an exemplary embodiment of the present invention, there is provided a lime powder drying apparatus including: a water-cooled induction coil 10 for preheating lime powder to be sprayed into the converter; and a power supply (not shown) connected to the water-cooled induction coil 10. By arranging the water-cooling induction coil 10 and the power supply, the power supply is used for providing electric energy for the water-cooling induction coil 10, so that the water-cooling induction coil 10 preheats lime powder to be sprayed into the converter, the humidity of the lime powder is effectively reduced, the fluidity of the lime powder is improved, the lime powder is prevented from being adhered to a conveying pipeline, the adaptability of a bottom powder spraying process to the lime powder is greatly enhanced, and the spraying speed of the converter is improved; and the thermal state lime powder can improve the heat of a molten pool and further improve the dephosphorization efficiency.
It should be noted that, in this example, the power supply adopts an intermediate frequency power supply.
As an alternative embodiment, the water-cooled induction coil 10 is wound outside the spraying part of the lime powder spraying tank.
According to another exemplary embodiment of the present invention, there is provided a converter including: the device comprises a converter body 20 and a lime powder injection tank 21, wherein the lime powder injection tank 21 is used for injecting lime powder into the converter body 20; and any one of the lime powder drying devices for preheating lime powder to be injected into the converter body 20, wherein the water-cooled induction coil 10 is wound on the outer side of the injection part 211 of the lime powder injection tank 21.
It should be noted that the volume of the lime powder injection tank 21 is more than or equal to 3 times of the volume of single powder injection, and the lime powder is heated continuously in the process of gradually descending to the bottom after entering from the top of the lime powder injection tank 21, so that the heating time is more than or equal to 3 heating cycles, thereby ensuring that the lime powder can be sufficiently heated and dried, and the fluidity of the lime powder can be obviously improved.
As an alternative embodiment, the spraying part 211 is arranged at the bottom of the lime powder spraying tank 21 and is in an inverted cone shape, and the winding height of the water-cooling induction coil 10 is the same as the height of the spraying part 211. Through setting up injection portion 211 for the back taper, can realize the gathering of lime powder to can reduce the heating radius of lime powder gradually, promote the heating effect, through setting up water-cooling induction coil 10 around establishing the height the same with the height of injection portion 211, carry out the abundant heating to the lime powder in the whole injection portion 211.
As an alternative embodiment, the spraying part 211 is communicated with the converter body 20 through a powder conveying pipe 22, and the powder conveying pipe 22 is sleeved with a heat insulating sleeve 23. Through setting up insulation cover 23, keep warm to whole defeated powder pipe 22, prevent to carry powder in-process lime powder and take place the contact heat transfer through defeated powder pipe 22 with the external world, lead to the temperature to reduce.
The material of the insulating jacket 23 is any one of conventional heat insulating materials such as asbestos and high-alumina cotton.
As an alternative embodiment, a valve 24 is disposed at one end of the powder conveying pipe 22 close to the spraying part 211.
In an alternative embodiment, a bottom blowing pipe 25 is connected to the powder conveying pipe 22. Through setting up bottom blowing pipe 25, utilize it to carry out bottom blowing oxygen, through setting up its intercommunication with defeated powder pipe 22, utilize its air current to wrap up and carry the synchronous transportation of holding lime powder.
According to another exemplary embodiment of the present invention, there is provided a lime powder injection method, which is applicable to any one of the electric furnaces, including the steps of:
s1, placing lime powder in the lime powder injection tank 21.
And S2, heating the spraying part 211 by using the water-cooling induction coil 10 to obtain dry lime powder.
S3, spraying the dry lime powder into the converter body 20 by adopting a bottom powder spraying mode, wherein the powder ratio is 2-20kg/Nm 3 。
As an alternative embodiment, the heating power of the water-cooled induction coil 10 is 30-100kW, and the heating temperature is 100-300 ℃.
As an alternative embodiment, the particle size of the dry lime powder is 20-200 mesh, and the moisture of the dry lime powder is 0-3%.
As an optional implementation manner, the method further comprises the following steps:
s3.1, bottom blowing oxygen to the converter body 20, wherein the strength of the bottom blowing oxygen is 0.1-5Nm 3 /t/min。
The present application will be described in detail with reference to examples and experimental data.
Example 1
A lime powder drying apparatus comprising: the water-cooling induction coil 10 and a power supply, wherein the power supply is connected with the water-cooling induction coil 10.
An electric fire comprising: converter body 20, lime powder injection tank 21 and above-mentioned lime powder drying device, injection portion 211 locate the bottom of lime powder injection tank 21, and be the back taper, and water-cooling induction coil 10 is around locating the outside of the injection portion 211 of lime powder injection tank 21, and the height that the height of establishing is the same with the injection portion 211 around of water-cooling induction coil 10. The injection part 211 is communicated with the converter body 20 through a powder conveying pipe 22, and the powder conveying pipe 22 is sleeved with a heat insulation sleeve 23; one end of the powder conveying pipe 22 close to the spraying part 211 is provided with a valve 24; a bottom blowing pipe 25 is connected beside the powder conveying pipe 22.
A lime powder blowing method comprises the following steps:
s1, putting lime powder into a lime powder injection tank 21.
Wherein: the lime powder had a flowability index of 47, a fluidity index of 53 and a moisture content of 0.7%.
And S2, heating the spraying part 211 by using the water-cooling induction coil 10 to obtain dry lime powder.
Wherein:
the heating power of the water-cooling induction coil 10 is 30-40kW, the heating temperature is 100-300 ℃, and the heating time is 120-150min;
the temperature of the injection part 211 is 200-280 ℃;
the temperature of the dried lime powder is 120-200 ℃;
the particle size of the dried lime powder is 20-200 meshes.
S3.1, bottom blowing oxygen into the converter body 20, wherein the strength of the bottom blowing oxygen is 0.5Nm 3 /t/min。
S3, spraying the dry lime powder into the converter body 20 by adopting a bottom powder spraying mode, wherein the powder ratio is 5kg/Nm 3 。
Example 2
A lime powder drying apparatus comprising: the water-cooling induction coil 10 and a power supply, wherein the power supply is connected with the water-cooling induction coil 10.
An electric fire comprising: converter body 20, lime powder injection tank 21 and above-mentioned lime powder drying device, injection portion 211 locate the bottom of lime powder injection tank 21, and be the back taper, and water-cooling induction coil 10 is around locating the outside of the injection portion 211 of lime powder injection tank 21, and the height that the height of establishing is the same with the injection portion 211 around of water-cooling induction coil 10. The injection part 211 is communicated with the converter body 20 through a powder conveying pipe 22, and the powder conveying pipe 22 is sleeved with a heat insulation sleeve 23; one end of the powder conveying pipe 22 close to the spraying part 211 is provided with a valve 24; a bottom blowing pipe 25 is connected beside the powder conveying pipe 22.
A lime powder blowing method comprises the following steps:
s1, putting lime powder into a lime powder injection tank 21.
Wherein: the lime powder had a fluidity index of 76, a spouting index of 79 and a moisture content of 0.8%.
And S2, heating the spraying part 211 by using the water-cooling induction coil 10 to obtain dry lime powder.
Wherein:
the heating power of the water-cooling induction coil 10 is 40-50kW, the heating temperature is 100-300 ℃, and the heating time is 120-150min;
the temperature of the injection part 211 is 280-320 ℃;
the temperature of the dried lime powder is 200-260 ℃;
the particle size of the dried lime powder is 20-200 meshes.
S3.1, bottom blowing oxygen into the converter body 20, wherein the strength of the bottom blowing oxygen is 0.5Nm 3 /t/min。
S3, spraying the dry lime powder into the converter body 20 by adopting a bottom powder spraying mode, wherein the powder ratio is 5kg/Nm 3 。
Example 3
A lime powder drying apparatus comprising: the water-cooling induction coil 10 and a power supply, and the power supply is connected with the water-cooling induction coil 10.
An electric fire comprising: converter body 20, lime powder injection tank 21 and above-mentioned lime powder drying device, injection portion 211 is located the bottom of lime powder injection tank 21, and is the back taper, and water-cooling induction coil 10 is around locating the outside of the injection portion 211 of lime powder injection tank 21, and the height of setting up around water-cooling induction coil 10 is the same with the height of injection portion 211. The injection part 211 is communicated with the converter body 20 through a powder conveying pipe 22, and the powder conveying pipe 22 is sleeved with a heat insulation sleeve 23; one end of the powder conveying pipe 22 close to the spraying part 211 is provided with a valve 24; a bottom blowing pipe 25 is connected beside the powder conveying pipe 22.
A lime powder blowing method comprises the following steps:
s1, placing lime powder in a lime powder injection tank 21.
Wherein: the lime powder had a flowability index of 69, a spouting index of 71 and a moisture content of 0.9%.
And S2, heating the spraying part 211 by using the water-cooling induction coil 10 to obtain dry lime powder.
Wherein:
the heating power of the water-cooling induction coil 10 is 50-70kW, the heating temperature is 100-300 ℃, and the heating time is 120-150min;
the temperature of the injection part 211 is 320-400 ℃;
the temperature of the dried lime powder is 260-300 ℃;
the granularity of the dried lime powder is 20-200 meshes.
S3.1, bottom blowing oxygen into the converter body 20, wherein the strength of the bottom blowing oxygen is 0.5Nm 3 /t/min。
S3, spraying the dry lime powder into the converter body 20 by adopting a bottom powder spraying mode, wherein the powder ratio is 5kg/Nm 3 。
Comparative example
A 300t bottom oxygen spraying and lime powder converter, wherein the granularity of the lime powder in the spraying tank is 20-200 meshes, the fluidity index is 69, the jetting fluidity index is 71, and the humidity is 0.9%. Opening the valve at the bottom of the injection tank to start injection, and allowing the lime powder to pass through the O-shaped nozzle 2 Conveying with a bottom-blown oxygen intensity of 0.5Nm 3 At/t/min, powder ratio 5kg/Nm 3 After entering a trunnion of the converter, the molten pool is sprayed from the bottom of the converter, and the spraying strength is 3.9kg/t steel/min.
Examples of the experiments
The endpoint parameters for the blowing process provided in examples 1-3 and comparative examples were detected and recorded, as shown in the following table.
As can be seen from the above table, the lime powder drying device, the converter and the lime powder blowing method provided by the application can effectively solve the problem that lime powder blocks a powder conveying pipeline, can remarkably raise the temperature of molten steel to 5-12 ℃, can remarkably reduce the content of phosphorus at the end point of the molten steel to below 0.005%, and can stabilize the t.fe content of slag to 9.2% on average.
Finally, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A lime powder drying device is characterized by comprising:
the water-cooling induction coil (10) is used for preheating lime powder to be sprayed into the converter;
and the power supply is used for being connected with the water-cooling induction coil (10).
2. The lime powder drying apparatus according to claim 1, wherein the water-cooled induction coil (10) is wound around an outside of a spraying portion of the lime powder spraying pot.
3. A converter, characterized by comprising:
a converter body (20);
a lime powder injection tank (21) for injecting lime powder into the converter body (20);
lime powder drying apparatus according to claim 1 or 2, for preheating lime powder to be injected into the converter body (20), the water-cooled induction coil (10) being wound around the outside of the injection section (211) of the lime powder injection tank (21).
4. The converter according to claim 3, wherein the injection part (211) is arranged at the bottom of the lime powder injection tank (21) and is in a reverse conical shape, and the winding height of the water-cooled induction coil (10) is the same as the height of the injection part (211).
5. The converter according to claim 3, characterized in that said injection section (211) communicates with said converter body (20) through a powder duct (22), said duct (22) being sheathed with a thermal insulating jacket (23).
6. The converter according to claim 5, characterized in that the powder duct (22) is provided with a valve (24) at its end close to the injection section (211).
7. A lime powder blowing method applied to the converter according to any one of claims 3 to 6, characterized by comprising the steps of:
placing lime powder in the lime powder injection tank (21);
heating the spraying part (211) by adopting the water-cooling induction coil (10) to obtain dry lime powder;
and spraying the dry lime powder into the converter body (20) in a bottom powder spraying mode.
8. Lime powder injection method according to claim 7, wherein the water-cooled induction coil (10) has a heating power of 30-100kW and the heating temperature is 100-300 ℃.
9. The lime powder injection method according to claim 7, wherein the particle size of the dried lime powder is 20-200 mesh, and the humidity of the dried lime powder is 0-3%.
10. The lime powder blowing method according to claim 7, further comprising the steps of:
bottom blowing oxygen to the converter body (20), the strength of the bottom blowing oxygen being 0.1-5Nm 3 /t/min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186196.9A CN115574554A (en) | 2022-09-27 | 2022-09-27 | Lime powder drying device, converter and lime powder blowing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211186196.9A CN115574554A (en) | 2022-09-27 | 2022-09-27 | Lime powder drying device, converter and lime powder blowing method |
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| CN115574554A true CN115574554A (en) | 2023-01-06 |
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Citations (6)
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|---|---|---|---|---|
| AR220040A1 (en) * | 1979-04-16 | 1980-09-30 | Nippon Steel Corp | STEEL REFINING PROCEDURE |
| JP2003105418A (en) * | 2001-09-27 | 2003-04-09 | Nippon Steel Corp | Method for pretreating molten iron and refining method |
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| CN112094980A (en) * | 2020-08-18 | 2020-12-18 | 北京科技大学 | System and method for efficient smelting of converter through top-bottom composite powder injection |
| CN112728884A (en) * | 2020-12-31 | 2021-04-30 | 天津科技大学 | Spouted bed drying device with guide pipe induction heating and method |
| CN213943827U (en) * | 2020-12-10 | 2021-08-13 | 江苏地盈液压机械制造有限责任公司 | Limestone powder conveying device |
-
2022
- 2022-09-27 CN CN202211186196.9A patent/CN115574554A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR220040A1 (en) * | 1979-04-16 | 1980-09-30 | Nippon Steel Corp | STEEL REFINING PROCEDURE |
| JP2003105418A (en) * | 2001-09-27 | 2003-04-09 | Nippon Steel Corp | Method for pretreating molten iron and refining method |
| CN102701608A (en) * | 2012-06-04 | 2012-10-03 | 石家庄市新华工业炉有限公司 | Limekiln coproduction device |
| CN112094980A (en) * | 2020-08-18 | 2020-12-18 | 北京科技大学 | System and method for efficient smelting of converter through top-bottom composite powder injection |
| CN213943827U (en) * | 2020-12-10 | 2021-08-13 | 江苏地盈液压机械制造有限责任公司 | Limestone powder conveying device |
| CN112728884A (en) * | 2020-12-31 | 2021-04-30 | 天津科技大学 | Spouted bed drying device with guide pipe induction heating and method |
Non-Patent Citations (1)
| Title |
|---|
| 石富，刘国征主编: "《稀土永磁材料制备技术 第2版》", vol. 2, 北京：冶金工业出版社, pages: 64 * |
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