CN113930579A - Method for protecting intermediate frequency furnace lining - Google Patents
Method for protecting intermediate frequency furnace lining Download PDFInfo
- Publication number
- CN113930579A CN113930579A CN202111112683.6A CN202111112683A CN113930579A CN 113930579 A CN113930579 A CN 113930579A CN 202111112683 A CN202111112683 A CN 202111112683A CN 113930579 A CN113930579 A CN 113930579A
- Authority
- CN
- China
- Prior art keywords
- frequency furnace
- intermediate frequency
- graphite crucible
- molten steel
- protecting
- 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
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 28
- 239000010439 graphite Substances 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 230000003993 interaction Effects 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Images
Classifications
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method for protecting an inner lining of an intermediate frequency furnace, which comprises the steps of placing a graphite crucible with a certain size into the intermediate frequency furnace, placing steel blanks required by a test into the graphite crucible, supplying power and heating, adding metallurgical slag materials for the test according to requirements after molten steel is molten, keeping for a certain time, powering off the intermediate frequency furnace, pouring out a slag sample and the molten steel, and taking out the graphite crucible. The invention aims to provide a method for protecting an inner lining of an intermediate frequency furnace, which is an important guarantee for normal research on an interaction mechanism of metallurgical slag and molten steel in order to reduce corrosion of the metallurgical slag to the inner lining of the intermediate frequency furnace.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to a method for protecting an inner lining of an intermediate frequency furnace.
Background
In the steelmaking-continuous casting production process, metallurgical slag such as converter slag, refining slag and crystallizer casting slag for casting are indispensable in each production link, and the research on the interaction mechanism of the metallurgical slag and molten steel in the steelmaking-continuous casting process plays an important role in the production process, the cleanliness of the molten steel and the quality of casting blanks.
The medium frequency electric furnace is used as an important branch for smelting metal, has the characteristics of high smelting efficiency, less element burning loss, stable yield, easy temperature control, convenient operation, less pollution and component adjustment, and plays an important role in the development of special steel grades and the development and research of special alloys. However, in the process of researching the interaction mechanism of the metallurgical slag and the molten steel by using the device, the metallurgical slag corrodes the lining of the intermediate frequency furnace, particularly, the corrosion of the slag line part is serious, the accuracy of test data is directly influenced, sometimes, even the lining is burnt through, the test is forced to stop, and the research on the interaction mechanism of the metallurgical slag and the molten steel cannot be completed.
In the experimental research process of the interaction mechanism of the metallurgical slag and the molten steel, the corrosion of the metallurgical slag to the lining of the intermediate frequency furnace is reduced, and the method is an important guarantee for the normal research of the interaction mechanism of the metallurgical slag and the molten steel. The method aims to solve the problem that whether the inner lining of the intermediate frequency furnace is corroded by metallurgical slag or not. The interaction test process of the high-temperature molten steel and the metallurgical slag is completed by utilizing the high temperature resistance and the erosion resistance of the graphite crucible, and the lining of the medium-frequency electric furnace is protected.
Disclosure of Invention
In order to research the interaction mechanism of the metallurgical slag and the molten steel and reduce the corrosion of the metallurgical slag to the lining of the intermediate frequency furnace, the invention aims to provide a method for protecting the lining of the intermediate frequency furnace, which is an important guarantee for the normal research of the interaction mechanism of the metallurgical slag and the molten steel.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a method for protecting an inner lining of an intermediate frequency furnace, which comprises the steps of placing a graphite crucible with a certain size in the intermediate frequency furnace, placing steel blanks required by a test into the graphite crucible, supplying power to heat the graphite crucible, adding metallurgical slag materials for the test according to requirements after molten steel is molten, keeping the temperature for a certain time, powering off the intermediate frequency furnace, pouring out a slag sample and the molten steel, and taking out the graphite crucible.
Further, the diameter, the height, the steel tapping hole and other parameters of the inner cavity of the intermediate frequency furnace of 100Kg are measured, and meanwhile, the oxidation of the graphite crucible in the test process is considered, so that the graphite crucible which is consistent with the inner lining of the intermediate frequency furnace and just placed into the intermediate frequency furnace is manufactured.
Further, the graphite crucible size is: 193mm of outer diameter, 163mm of inner diameter, 430mm of height and 40mm of thickness of the bottom of the crucible.
Compared with the prior art, the invention has the beneficial technical effects that:
in the method, the interaction test process of the high-temperature molten steel and the metallurgical slag is completed by fully utilizing the high-temperature resistance and the erosion resistance of the graphite crucible, and the lining of the medium-frequency electric furnace is protected, so that the operability is high.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic size diagram of a graphite crucible.
Detailed Description
A method for protecting the lining of intermediate frequency furnace features that the parameters such as diameter, height and steel outlet of 100Kg of internal cavity of intermediate frequency furnace are accurately measured and tested, the oxidation of graphite crucible during test is considered to ensure the thickness of bottom and wall of graphite crucible, and the graphite crucible with external diameter of 193mm, internal diameter of 163mm, height of 430mm and bottom thickness of 40mm is made up, as shown in FIG. 1. And putting the prepared graphite crucible into an intermediate frequency furnace. Putting a steel blank required by the test into a graphite crucible, powering on and heating up, adding a metallurgical slag material for the test according to the requirement after molten steel is completely melted, keeping for a certain time, powering off the intermediate frequency furnace, pouring out a slag sample and the molten steel, and taking out the graphite crucible. The lining of the intermediate frequency furnace is intact.
The present invention will be further illustrated with reference to the following examples.
Example (b):
in the use process of carrying out interaction between high-temperature molten steel and crystallizer casting powder, a graphite crucible is placed in a 100Kg medium-frequency electric furnace, 25Kg of cut Q345E low-carbon continuous casting billet sample is added into the graphite crucible, 150ppm of rare earth Ce is added after the steel sample is melted, 300g of crystallizer casting powder for Q345E is added onto the molten steel surface after 10s, after the casting powder is completely added, the power is cut off after 2min, casting powder slag on the molten steel surface is taken out, the molten steel is poured out, and the graphite crucible is taken out. The lining of the intermediate frequency furnace is intact.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (3)
1. A method for protecting an inner lining of an intermediate frequency furnace is characterized by comprising the following steps: placing a graphite crucible with a certain size in an intermediate frequency furnace, placing steel blanks required by the test into the intermediate frequency furnace, supplying power to heat the graphite crucible, adding metallurgical slag for the test according to requirements after molten steel is molten, keeping the temperature for a certain time, powering off the intermediate frequency furnace, pouring out a slag sample and the molten steel, and taking out the graphite crucible.
2. The method of protecting an inner liner of a medium frequency furnace of claim 1, wherein: the diameter, the height, the steel tapping hole and other parameter sizes of the inner cavity of the 100Kg intermediate frequency furnace are measured, and meanwhile, the oxidation of the graphite crucible in the test process is considered, so that the graphite crucible which is consistent with the inner lining of the intermediate frequency furnace and just placed into the intermediate frequency furnace is manufactured.
3. Method for protecting an inner lining of a medium frequency furnace according to claim 1 or 2, characterized in that: the size of the graphite crucible is as follows: 193mm of outer diameter, 163mm of inner diameter, 430mm of height and 40mm of thickness of the bottom of the crucible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112683.6A CN113930579A (en) | 2021-09-23 | 2021-09-23 | Method for protecting intermediate frequency furnace lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112683.6A CN113930579A (en) | 2021-09-23 | 2021-09-23 | Method for protecting intermediate frequency furnace lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113930579A true CN113930579A (en) | 2022-01-14 |
Family
ID=79276522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111112683.6A Pending CN113930579A (en) | 2021-09-23 | 2021-09-23 | Method for protecting intermediate frequency furnace lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113930579A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208259A (en) * | 2018-11-06 | 2020-05-29 | 宝钢特钢有限公司 | Slag-metal reaction simulation test device and method for continuous casting crystallizer casting powder |
-
2021
- 2021-09-23 CN CN202111112683.6A patent/CN113930579A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208259A (en) * | 2018-11-06 | 2020-05-29 | 宝钢特钢有限公司 | Slag-metal reaction simulation test device and method for continuous casting crystallizer casting powder |
Non-Patent Citations (2)
| Title |
|---|
| 康伟 等: "高碳锰铁氧化脱磷的试验研究", 《铁合金》 * |
| 李琦 等: "高炉含钛炉渣脱硫能力的研究", 《昆明理工大学学报(理工版)》 * |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220114 |