CN111750689A - AOD furnace lining monitoring and early warning system - Google Patents
AOD furnace lining monitoring and early warning system Download PDFInfo
- Publication number
- CN111750689A CN111750689A CN202010756331.3A CN202010756331A CN111750689A CN 111750689 A CN111750689 A CN 111750689A CN 202010756331 A CN202010756331 A CN 202010756331A CN 111750689 A CN111750689 A CN 111750689A
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- Prior art keywords
- annular conductor
- shell
- monitoring
- early warning
- aod furnace
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 36
- 238000007664 blowing Methods 0.000 claims abstract description 17
- 239000011449 brick Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 238000009413 insulation Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 14
- 238000012806 monitoring device Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0021—Devices for monitoring linings for wear
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a monitoring and early warning system for a furnace lining of an AOD furnace, which relates to the AOD furnace and comprises an AOD furnace body, an air blowing gun and a monitoring and early warning device, wherein the AOD furnace body is composed of a shell which is coaxially distributed and an inner lining layer which is arranged in the shell and is made of refractory bricks, an annular conductor is embedded or sleeved on the outer side wall of the inner lining layer, one end of the annular conductor is connected with the outer side of the shell and is provided with a lead-out wire to the shell, the lower part of the shell is provided with an air blowing gun hole which is communicated with the inner space of the inner lining layer, one end of the air blowing gun is inserted into the air blowing gun hole after being subjected to insulating and sealing treatment, the end of the air blowing gun is exposed in the furnace body in; the monitoring and early warning device is respectively connected with the lead-out wire and the wire terminal; the method can effectively monitor the thickness of the lining layer of the AOD furnace, and avoids the defect that the monitoring cannot be carried out.
Description
Technical Field
The invention relates to an AOD furnace, in particular to an AOD furnace capable of monitoring the thickness of an inner lining layer.
Background
The AOD furnace is the main equipment for refining stainless steel, has simple structure, convenient operation and strong adaptability, and is widely adopted. The outer (outer) of the AOD furnace structure shell is a steel body, the furnace lining (inner) is a refractory brick layer, the middle of the AOD furnace structure shell is provided with a heat insulation area, heat insulation materials are filled, the lower part of the furnace body is provided with a blowing cavity, the blowing cavity is inserted into the furnace body from the side part of the furnace body, the blowing cavity is of a double-layer structure, the outer pipe is only communicated with an argon or nitrogen air port, the inner pipe is communicated with oxygen and nitrogen, during smelting, mixed gas is used for sending the blowing cavity into the furnace from the inlet side, and the oxygen-argon ratio is controlled and adjusted through a cover ring of the air port, so that the best operation. Because the AOD furnace lining is made by resistant firebrick, lead to its easy wearing and tearing, use to change after a period, change untimely, will cause and wear the stove accident, change and just early cause the production waste, this is exactly that the technique that current AOD furnace exists is not enough.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a furnace lining monitoring and early warning system of an AOD furnace, so as to solve the technical problem that the wear condition of the furnace lining of the AOD furnace in the prior art cannot be monitored.
The invention is realized by the following technical scheme:
the invention provides an AOD furnace lining monitoring and early warning system, which comprises an AOD furnace body, an air blow gun and a monitoring and early warning device, wherein the AOD furnace body is composed of a shell and an inner lining layer, the shell is coaxially distributed, the inner lining layer is made of refractory bricks, a heat insulation layer fixed on the shell is filled between the shell and the inner lining layer, an annular conductor is embedded or sleeved on the outer side wall of the inner lining layer, the annular conductor is connected with a lead-out wire, one end of the lead-out wire is arranged outside the shell, an air blow gun hole communicated with the inner space of the inner lining layer is arranged at the lower part of the shell, one end of the air blow gun is inserted into the air blow gun hole after insulation sealing treatment, the end of the air;
the monitoring and early warning device comprises a power switch, a transformer, a resistor, a current transmitter and a PLC control system, wherein one end of the resistor is connected with the output end of the transformer after the resistor is connected with the current transmitter in series, the other end of the resistor is connected with a lead-out wire connected with an annular conductor, the other end of the transformer is connected with a wire wiring end on the air blow gun, a power interface of the current transmitter is connected with the output end of the power switch, and the output end of the current transmitter is connected with the PLC control system.
Furthermore, a self-checking switch is connected in parallel between the outer end of the lead-out wire and a wire terminal on the air blow gun.
Further, the annular conductor is specifically a 2-5 mesh stainless steel net.
Further, the distance between the annular conductor and the heat insulation layer is 1-2cm, and an insulation material layer is filled between the annular conductor and the heat insulation layer;
further, the height of the annular conductor is 100-120cm, and the annular conductor is arranged at the position of the molten steel area.
Compared with the prior art, the invention has the following advantages: the invention provides an AOD furnace lining monitoring and early warning system, which is characterized in that a current loop is formed by connecting an annular conductor with an inner lining layer, molten steel in a furnace, an oxygen blowing gun and a current monitoring device, so that the effective monitoring of the thickness change of the inner lining layer is realized, and the defect caused by the fact that the thickness of the inner lining layer cannot be monitored can be effectively avoided.
The inner liner of stove initial stage is than thicker, the resistance value is big, the electric current is little, along with smelting time lapse, the inner liner is more and more thin by molten steel erosion, the resistance value is little, the electric current is big, when the inner liner is eroded to exposing annular conductor, molten steel and annular conductor direct contact form the short circuit, the electric current reachs the maximum value, this is the stove accident of just taking place to wear, the electric current size is inversely proportional with inside liner thickness, thereby realized the control to inner liner thickness change, avoided wearing stove or inside lining change too early drawback, very big improvement the security of production, and the production cost is saved.
Drawings
FIG. 1 is a schematic structural diagram of an AOD furnace lining monitoring and early warning system provided by the embodiment.
In the figure: 1. a housing; 2. an inner liner layer; 3. a heat insulation layer; 4. a loop conductor; 5. an air blow gun; 6. a power switch; 7. a transformer; 8. a resistance; 9. a current transmitter; 10. a PLC control system; 11. and (4) a self-checking switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Examples
With reference to fig. 1, in the present embodiment, there is provided an AOD furnace lining monitoring and early warning system, including an AOD furnace body, where the AOD furnace body is specifically composed of a casing 1 (the casing 1 is generally of a metal structure, and in particular, in the present embodiment, is specifically of a steel structure) and an inner lining layer 2 made of refractory bricks and arranged inside the casing 1 (the inner lining layer 2 is made of refractory bricks and can effectively contain molten metal, but the molten metal is liable to wear the inner wall of the inner lining layer 2 made of refractory bricks, so that it becomes thinner, and thus a defect in the background art is generated), and a heat insulating layer 3 is filled between the two;
in order to avoid inner liner 2 by wearing and tearing and the drawback that can't in time discover to lead to, in this embodiment, through inlay on 2 lateral walls of inner liner at the AOD stove or the cover be equipped with the annular conductor 4 not rather than the inner space contact, the realization is to the wearing and tearing condition real-time supervision with inner liner 2, according to the size of AOD stove, can set up annular conductor 4 in the position of 2 outer differences of inner liner, it is good at the 2 easiest wearing and tearing positions of inner liner that generally set up, play and effectively prevent 2 inside walls wearing and tearing of inner liner and take place the stove accident, improve equipment's operation safety, can also accomplish ageing change inner liner 2, and the operation cost is.
In particular, in order to achieve the purpose of monitoring the thickness change of the inner liner 2, in this embodiment, one end of the annular conductor 4 is connected with one end of the current monitoring device (referring to fig. 1, the annular conductor 4 is connected with the current monitoring device by leading out a lead, and the part of the lead contacting with the shell 1 is sleeved with a ceramic insulator so that the annular conductor 4 is not electrically connected with the shell 1), the other end of the current monitoring device is connected with one end of the air blow gun 5, and the other end of the air blow gun 5 can be arranged in the inner space of the heat preservation and insulation layer 3 through an air blow gun hole (the part of the air blow gun 5 contacting with the air blow gun hole is coated with an insulation layer so that the air blow gun 5 can only be electrically connected with the molten metal and the current monitoring device), when the inner cavity of the inner liner 2 is provided with the molten metal and one end of the, The molten metal, the lining layer 2, the annular conductor 4 and the annular conductor form the current change condition of the circuit.
Through the aforesaid setting, when being full of the molten metal in the inner liner 2, current monitoring device circular telegram, the one end of air blow gun 5 sets up 2 inner chambers of inner liner, air blow gun 5, the molten metal, the inner liner 2, annular conductor 4 and current monitoring device constitute closed loop, electric current in the return circuit is effectively monitored by current monitoring device, when 2 thickness changes in inner liner, electric current in its corresponding circuit will also change, and then can monitor 2 thickness in the inner liner according to the current change, thereby can avoid the unable drawback that the monitoring brought of 2 thickness changes in inner liner, the security of equipment has greatly been improved.
In particular, in this embodiment, the current monitoring device includes an external power supply, a power switch 6, a transformer 7, a resistor 8, a current transformer 9 and a PLC control system 10, the air blowing gun 5, the transformer 7, the resistor 8, the current transformer 9 and the annular conductor 4 are sequentially connected in series, the transformer 7 is further connected with the external power supply, the PLC control system 10 is electrically connected with the current transformer 9, the current transformer 9 is electrically connected with the external power supply through the power switch 6, and a self-checking switch 11 is further connected in parallel between the annular conductor 4 and the air blowing gun 5.
Through the aforesaid setting, can obtain in combination with the attached drawing, switch 6 opens and supplies power for current transducer 9, current transducer 9 can effectively acquire air blow gun 5, the molten metal, inner liner 2, the current condition in the circuit of annular conductor 4 place, constantly wear and tear when inner liner 2, resistance value between molten metal and the annular conductor 4 then constantly reduces, and then lead to the current constantly to increase, can effectively judge the thickness condition of inner liner 2 according to this kind of condition, self-checking switch 11 is the off-state when this internal molten metal that has of AOD stove, only when no molten metal, carry out the closure self-checking.
In combination with the above, the purpose that air blow gun 5 set up is in order to communicate metal liquid, inside liner 2, annular conductor 4 and current monitoring device formation current loop to reach the purpose of monitoring inside liner 2 thickness.
In the present embodiment
In order to reduce the manufacturing cost of equipment, make full use of the existing conditions, choose air blow gun 5 as connecting device, its one end inserts the inner chamber of inner liner 2 through the air blow gun mouth of seting up in AOD stove body lateral wall bottom, and air blow gun 5 will carry out sealed insulation treatment to its outer wall etc. before the use for only its both ends can be respectively in the molten metal and the electric current monitoring devices electricity federation, thereby avoid the interference of external equipment.
Claims (5)
1. The utility model provides a AOD stove furnace wall monitoring and early warning system, includes AOD stove body and air blow gun (5), its characterized in that: the AOD furnace body is composed of a shell (1) and an inner lining layer (2) which is arranged in the shell (1) and made of refractory bricks, wherein the outer lining layer (2) is coaxially distributed, a heat insulation layer (3) fixed on the shell (1) is filled between the shell and the inner lining layer, an annular conductor (4) is embedded or sleeved on the outer side wall of the inner lining layer (2), the annular conductor (4) is connected with a lead-out wire one end of which is arranged on the outer side of the shell (1), a blowing gun hole communicated with the inner space of the inner lining layer (2) is arranged at the lower part of the shell (1), one end of a blowing gun (5) is inserted into the blowing gun hole after insulation sealing treatment, the end of the blowing gun is exposed in the inner space of the inner lining layer (2);
monitoring early warning device includes switch (6), transformer (7), resistor (8), current transmitter (9), PLC control system (10), resistor (8) with current transmitter (9) concatenates the back, and the output of transformer (7) is received to one end, and the other end is connected with the wire of drawing forth that is connected with annular conductor (4), the other end and air blow rifle (5) of transformer (7) go up the wire wiring end and meet, the power source of current transmitter (9) is connected with the output of switch (6), and the output and the PLC control system (10) of current transmitter (9) are connected.
2. The AOD furnace lining monitoring and early warning system according to claim 1, wherein a self-checking switch (11) is connected in parallel between the outer end of the lead-out wire and a wire terminal on the air blowing gun (5).
3. The AOD furnace lining monitoring and early warning system according to claim 1, wherein the annular conductor (4) is a stainless steel mesh with 2-5 meshes.
4. The AOD furnace lining monitoring and early warning system according to claim 1, wherein the distance between the annular conductor (4) and the heat insulating layer (3) is 1-2cm, and an insulating material layer is arranged between the annular conductor and the heat insulating layer or on the part of the annular conductor (4) exposed outside the lining layer (2).
5. The AOD furnace lining monitoring and early warning system according to claim 1, wherein the height of the annular conductor (4) is 100-120cm, and the annular conductor is arranged at the position of a molten steel area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010756331.3A CN111750689A (en) | 2020-07-31 | 2020-07-31 | AOD furnace lining monitoring and early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010756331.3A CN111750689A (en) | 2020-07-31 | 2020-07-31 | AOD furnace lining monitoring and early warning system |
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| Publication Number | Publication Date |
|---|---|
| CN111750689A true CN111750689A (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010756331.3A Pending CN111750689A (en) | 2020-07-31 | 2020-07-31 | AOD furnace lining monitoring and early warning system |
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| Country | Link |
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| CN (1) | CN111750689A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049332A (en) * | 2021-03-19 | 2021-06-29 | 中海石油化学股份有限公司 | Analytical determination method for chromium ions in pre-decarbonization liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1130659A (en) * | 1965-11-20 | 1968-10-16 | Demag Elektrometallurgie Gmbh | Method and apparatus for recording the wall thickness in metallurgical furnaces |
| DE19602249A1 (en) * | 1996-01-23 | 1997-07-24 | Ald Vacuum Techn Gmbh | Early warning system for molten metal break-through in induction furnaces |
| CN1746611A (en) * | 2005-10-07 | 2006-03-15 | 朱兴发 | Lining thickness detector of smelting furnace |
| CN202509103U (en) * | 2011-12-23 | 2012-10-31 | 潍坊鼎晟电气科技有限公司 | Furnace lining leakage detector for medium-frequency induction heating furnace |
| CN103528378A (en) * | 2013-10-24 | 2014-01-22 | 昆山良昕环保节能有限公司 | Furnace lining detection device of induction furnace body |
| CN110243182A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of intermediate frequency furnace leak detection protection system |
| CN110366667A (en) * | 2017-02-01 | 2019-10-22 | 伊梅斯切公司 | Damage detection system and application method |
| CN212299981U (en) * | 2020-07-31 | 2021-01-05 | 安徽富凯特材有限公司 | AOD furnace lining monitoring and early warning system |
-
2020
- 2020-07-31 CN CN202010756331.3A patent/CN111750689A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1130659A (en) * | 1965-11-20 | 1968-10-16 | Demag Elektrometallurgie Gmbh | Method and apparatus for recording the wall thickness in metallurgical furnaces |
| DE19602249A1 (en) * | 1996-01-23 | 1997-07-24 | Ald Vacuum Techn Gmbh | Early warning system for molten metal break-through in induction furnaces |
| CN1746611A (en) * | 2005-10-07 | 2006-03-15 | 朱兴发 | Lining thickness detector of smelting furnace |
| CN202509103U (en) * | 2011-12-23 | 2012-10-31 | 潍坊鼎晟电气科技有限公司 | Furnace lining leakage detector for medium-frequency induction heating furnace |
| CN103528378A (en) * | 2013-10-24 | 2014-01-22 | 昆山良昕环保节能有限公司 | Furnace lining detection device of induction furnace body |
| CN110366667A (en) * | 2017-02-01 | 2019-10-22 | 伊梅斯切公司 | Damage detection system and application method |
| CN110243182A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of intermediate frequency furnace leak detection protection system |
| CN212299981U (en) * | 2020-07-31 | 2021-01-05 | 安徽富凯特材有限公司 | AOD furnace lining monitoring and early warning system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049332A (en) * | 2021-03-19 | 2021-06-29 | 中海石油化学股份有限公司 | Analytical determination method for chromium ions in pre-decarbonization liquid |
| CN113049332B (en) * | 2021-03-19 | 2022-09-27 | 中海石油化学股份有限公司 | Analytical determination method for chromium ions in pre-decarbonization liquid |
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