CN111607685A - LF furnace refining process mechanism optimization process - Google Patents
LF furnace refining process mechanism optimization process Download PDFInfo
- Publication number
- CN111607685A CN111607685A CN201910131527.0A CN201910131527A CN111607685A CN 111607685 A CN111607685 A CN 111607685A CN 201910131527 A CN201910131527 A CN 201910131527A CN 111607685 A CN111607685 A CN 111607685A
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- CN
- China
- Prior art keywords
- stirring
- gun
- control model
- dynamic
- transformer
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Classifications
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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
- 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
- C21C7/072—Treatment with gases
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
- C21C2300/00—Process aspects
- C21C2300/06—Modeling of the process, e.g. for control purposes; CII
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses an LF (ladle furnace) refining process mechanism optimization process, which comprises an LF body, a stirring gun, a dynamic stirring control model and a transformer, wherein the bottom end inside the LF body is provided with a gas permeable brick, the gas permeable brick is connected with a high-pressure gas pipeline, the stirring gun is arranged inside the LF body and is connected with the dynamic stirring control model, the stirring gun is provided with two parallel lines, nitrogen flow and argon flow, the dynamic stirring control model controls the rotation speed of the stirring gun, the original stirring speed is compared, and classification recording is carried out, the LF body is additionally provided with the transformer, the transformer is connected with an electrode inside the LF body, and the electric quantity of electric arc and the length of generated electric arc are controlled through the transformer. The invention controls the stirring speed of the stirring gun through the dynamic stirring control model so as to facilitate the analysis of the argon consumption and the electrode consumption speed by the working personnel.
Description
Technical Field
The invention relates to the technical field of LF furnaces of steel plants, in particular to an LF furnace refining process mechanism optimization process.
Background
An LF furnace, namely a ladle refining furnace, is a special form of an electric arc furnace and is main external refining equipment in steel production. Because of its simple equipment, low investment cost, flexible operation and good refining effect, the LF furnace can be matched with an electric furnace to replace the reduction period of the electric furnace and can be matched with an oxygen converter to produce high-quality alloy steel.
In actual production, insufficient stirring speed of the stirring gun can cause temperature deviation and increase refractory consumption, if the stirring speed is too high, carburization and electrode consumption are caused under the action of electric arcs, the manual regulation precision is poor, and particularly when ultra-low carbon steel grades are produced, the stirring speed must be optimized and controlled.
Disclosure of Invention
The invention aims to provide an LF refining process mechanism optimization process, which has the advantages of controlling and optimizing the rotation of a stirring gun and solves the problem that the manual control of the stirring gun is not accurate enough.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a concise technology mechanism optimization technology of LF stove, includes LF stove body, stirring gun, dynamic stirring control model and transformer, its characterized in that: the inside bottom of LF stove body is provided with the air brick, and the air brick is connected with the high-pressure gas pipeline, the inside stirring rifle that is provided with of LF stove body, the stirring rifle is connected with dynamic stirring control model, the stirring rifle is provided with two parallel line:
(1) nitrogen flow: nitrogen can be used for steel with low nitrogen content, and when the silicon killed steel is used for nitrogen stirring, the nitrogen content is increased by 2 ppm/min.
(2) Argon flow: argon is normally used as the stirring gas, so that the cost can be reduced.
Preferably, the dynamic stirring control model controls the rotation speed of the stirring gun, and records the rotation speed in a grading manner by comparing the original stirring speed;
(1) when the rotating speed of the stirring gun is controlled by the dynamic stirring control model to be less than the rotation of the stirring gun when the dynamic stirring control model is not additionally arranged, the argon consumption, the electrode consumption and the recarburization are recorded and compared.
(2) When the rotating speed of the stirring gun is controlled by the dynamic stirring control model to be greater than the rotation of the stirring gun when the dynamic stirring control model is not additionally arranged, the argon consumption, the electrode consumption and the recarburization are recorded and compared.
Preferably, the LF stove body is add the transformer, and the transformer is connected with the inside electrode of LF stove body, and through the electric quantity of transformer control electric arc and the length of production electric arc, provide the calculated value:
power density less than 2.1/2.5 MW/square meter
11cm < arc length >7cm
The temperature is controlled to be between 4 and 5 ℃/min.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the dynamic stirring control model is arranged, so that the effect of controlling the stirring speed of the stirring gun is achieved, the dynamic stirring control model controls the rotating speed of the stirring gun, and compared with the original stirring speed, the dynamic stirring control model records in a grading manner, so that people can conveniently record and analyze the argon consumption, the electrode consumption and the carbon increasing amount when the rotating speed of the stirring gun is smaller than or larger than the rotating speed of the stirring gun when the dynamic stirring control model is not additionally arranged, and the optimal production scheme is conveniently formulated.
2. The invention achieves the effect of controlling the quantity and the length of the electric arc by arranging the transformer, controls the quantity and the length of the electric arc by the transformer, avoids the carburization and the increase of the consumption of the electrode under the action of the electric arc, reduces the loss of the electrode and analyzes the loss reason of the electrode so as to minimize the loss of the electrode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provided by the invention comprises the following steps: the utility model provides a concise technology mechanism optimization technology of LF stove, includes LF stove body, stirring gun, dynamic stirring control model and transformer, the inside bottom of LF stove body is provided with air brick, and air brick is connected with the high-pressure gas pipeline, and when air brick blockked up, the pipeline through the bypass is high-pressure gas from outside pipeline lug connection to air brick to the rifle accident mixing system is blown in the configuration, the inside stirring gun that is provided with of LF stove body, the stirring gun is connected with dynamic stirring control model, the stirring gun is provided with two parallel lines:
1. nitrogen flow: nitrogen can be used for steel with low nitrogen content, and when the silicon killed steel is used for nitrogen stirring, the nitrogen content is increased by 2 ppm/min.
2. Argon flow: argon is normally used as the stirring gas, so that the cost can be reduced.
The dynamic stirring control model is more based on practicality, has great advantages compared with the traditional manual regulation, can optimize the system setting according to the actual refining requirement and the ladle situation, analyzes the rotating speed of more suitable actual production through optimizing the rotating speed of a stirring gun, avoids stirring excessively and can save the use of argon gas.
The dynamic stirring control model controls the rotation speed of the stirring gun, and records the stirring speed in grades by comparing the original stirring speed;
1. when the rotating speed of the stirring gun is controlled by the dynamic stirring control model to be less than the rotation of the stirring gun when the dynamic stirring control model is not additionally arranged, the argon consumption, the electrode consumption and the recarburization are recorded and compared.
2. When the rotating speed of the stirring gun is controlled by the dynamic stirring control model to be greater than the rotation of the stirring gun when the dynamic stirring control model is not additionally arranged, the argon consumption, the electrode consumption and the recarburization are recorded and compared.
The slew velocity of dynamic stirring control model control stirring rifle, the contrast stirring speed originally, carry out the record in grades, the people of being convenient for is less than or is greater than the rotation of stirring rifle when not addding dynamic stirring control model to the slew velocity of stirring rifle, and the contrast argon gas consumption, electrode consumption and carburation volume carry out record and analysis, it is too big to avoid stirring speed, under the effect of electric arc, can arouse the consumption of carburation and increase electrode, be convenient for formulate the best production scheme.
The transformer is add to the LF stove body, and the transformer is connected with the inside electrode of LF stove body, and through the electric quantity of transformer control electric arc and the length that produces electric arc, provide the calculated value:
power density less than 2.1/2.5 MW/square meter
11cm < arc length >7cm
The temperature is controlled to be between 4 and 5 ℃/min.
The transformer controls the electric quantity and the arc length of the arc, avoids recarburization and electrode consumption increase under the action of the arc, reduces the loss of the electrode and analyzes the loss reason of the electrode so as to minimize the loss of the electrode.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. The utility model provides a concise technology mechanism optimization technology of LF stove, includes LF stove body, stirring gun, dynamic stirring control model and transformer, its characterized in that: the inside bottom of LF stove body is provided with the air brick, and the air brick is connected with the high-pressure gas pipeline, the inside stirring rifle that is provided with of LF stove body, the stirring rifle is connected with dynamic stirring control model, the stirring rifle is provided with two parallel line:
(1) nitrogen flow: nitrogen can be used for steel with low nitrogen content, and when the silicon killed steel is used for nitrogen stirring, the nitrogen content is increased by 2 ppm/min.
(2) Argon flow: argon is normally used as the stirring gas, so that the cost can be reduced.
2. The LF furnace refining process mechanism optimization process according to claim 1, characterized in that: the dynamic stirring control model controls the rotation speed of the stirring gun, compares the original stirring speed, and records the stirring speed in grades;
(1) when the rotating speed of the stirring gun is controlled by the dynamic stirring control model to be less than the rotation of the stirring gun when the dynamic stirring control model is not additionally arranged, the argon consumption, the electrode consumption and the recarburization are recorded and compared.
(2) When the rotating speed of the stirring gun is controlled by the dynamic stirring control model to be greater than the rotation of the stirring gun when the dynamic stirring control model is not additionally arranged, the argon consumption, the electrode consumption and the recarburization are recorded and compared.
3. The LF furnace refining process mechanism optimization process according to claim 1, characterized in that: the transformer is add to the LF stove body, and the transformer is connected with the inside electrode of LF stove body, through the electric quantity of transformer control electric arc and the length that produces electric arc, provides the calculated value:
power density less than 2.1/2.5 MW/square meter
11cm < arc length >7 cm.
4. The temperature is controlled to be between 4 and 5 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910131527.0A CN111607685A (en) | 2019-02-22 | 2019-02-22 | LF furnace refining process mechanism optimization process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910131527.0A CN111607685A (en) | 2019-02-22 | 2019-02-22 | LF furnace refining process mechanism optimization process |
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| Publication Number | Publication Date |
|---|---|
| CN111607685A true CN111607685A (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910131527.0A Pending CN111607685A (en) | 2019-02-22 | 2019-02-22 | LF furnace refining process mechanism optimization process |
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| Country | Link |
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| CN (1) | CN111607685A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206289272U (en) * | 2016-12-29 | 2017-06-30 | 马鞍山市中桥金属材料有限公司 | A kind of adjustable LF stoves of electrode |
| CN207062320U (en) * | 2017-07-26 | 2018-03-02 | 辽宁科技大学 | The ladle agitating device that a kind of adjacent oar rotates in opposite directions |
-
2019
- 2019-02-22 CN CN201910131527.0A patent/CN111607685A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206289272U (en) * | 2016-12-29 | 2017-06-30 | 马鞍山市中桥金属材料有限公司 | A kind of adjustable LF stoves of electrode |
| CN207062320U (en) * | 2017-07-26 | 2018-03-02 | 辽宁科技大学 | The ladle agitating device that a kind of adjacent oar rotates in opposite directions |
Non-Patent Citations (2)
| Title |
|---|
| 刘会林等: "《电弧炉短流程炼钢设备与技术》", 31 January 2012, 冶金工业出版社 * |
| 杨旭: "《中国科技发展精典文库（中）》", 31 May 2003, 中国言实出版社 * |
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Application publication date: 20200901 |