CN110863079A - Efficient steel tapping TSR furnace and steel tapping operation method thereof - Google Patents
Efficient steel tapping TSR furnace and steel tapping operation method thereof Download PDFInfo
- Publication number
- CN110863079A CN110863079A CN201810980897.7A CN201810980897A CN110863079A CN 110863079 A CN110863079 A CN 110863079A CN 201810980897 A CN201810980897 A CN 201810980897A CN 110863079 A CN110863079 A CN 110863079A
- Authority
- CN
- China
- Prior art keywords
- tapping
- steel
- tsr
- ladle
- furnace
- 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
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
- C21C5/005—Manufacture of stainless steel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a TSR furnace for efficient steel tapping and a steel tapping operation method thereof. Compared with the prior art, the invention has the advantages that: by using the improved TSR furnace and the tapping operation method thereof, the problems of oxygenation and nitrogen increase of molten steel in the tapping process can be obviously reduced; in the TSR furnace tapping process, steel slag is mixed out, liquid slag is arranged at the front end of the molten steel, the front end molten steel is prevented from contacting with air in the tapping process, the tapping time of a steel tapping furnace hole of the TSR furnace is short, the contact area of steel flow and air in the TSR furnace tapping process is reduced, the oxygen absorption and nitrogen absorption quantity of the molten steel in the tapping process is reduced, and the pollution degree of the molten steel in the tapping process is reduced.
Description
Technical Field
The invention relates to the technical field of stainless steel production, in particular to a high-efficiency steel tapping TSR furnace and a steel tapping operation method thereof.
Background
The TSR furnace smelting stainless steel is large in proportion in the field of stainless steel production, steel tapping is mostly carried out at a steel tapping hole in a steel tapping mode of the TSR furnace, molten steel is separated from slag in the steel tapping process, the steel tapping process is long in time, the molten steel is exposed in the air in the steel tapping process, the oxidation and the nitridation of the molten steel are serious, the oxygen of the molten steel is increased by 10-20ppm in the steel tapping process, and the nitrogen is increased by 30-50 pmm; because molten steel absorbs oxygen and nitrogen in the tapping process, the variety of the ultrapure 400 series stainless steel smelted by the TSR furnace is severely limited; the TSR furnace adopts a tapping mode at a tapping hole, a deslagging mode at a furnace hole, and deslagging after steel is discharged first. The tapping speed is limited by the inner diameter of the tapping hole in the tapping process, the inner diameter of the tapping hole is smaller in the early stage of the furnace life, the tapping time is long, the inner diameter of the tapping hole is large in the later stage of the furnace life, the tapping time is slightly short, but the tapping hole is corroded by molten steel and slag in the later stage, the length is shortened, the phenomena of free flow and more serious oxygen absorption and nitrogen exist in the tapping process, and the TSR tapping time is 2-4 minutes. The TSR furnace is used for discharging slag from a furnace mouth, and the slag receiving disc is shallow, so that slag splashes outwards in the slag receiving process of the slag receiving disc, the slag pouring time is long, and the slag pouring time of the TSR furnace is 3-5 minutes. Because the TSR furnace adopts the tapping of the steel tapping hole behind the furnace, the slag pouring of the furnace opening in front of the furnace, after the TSR furnace finishes the steel tapping, the steel tapping hole needs to process and tilt the furnace body for 6-10 minutes, and the smelting period is prolonged.
The requirement of industrial production on the quality of stainless steel is increasing day by day, so that the components of the stainless steel are required to be accurately controlled in the smelting process of the stainless steel, and the requirement on the purity of molten steel is also increasing day by day. The TSR furnace and the matched tapping operation method can shorten the smelting period and improve the quality of molten steel.
Disclosure of Invention
The invention aims to overcome the technical defects and provide the TSR furnace for efficient steel tapping and the steel tapping operation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the TSR furnace comprises a TSR furnace body, wherein the TSR furnace body comprises a steel tapping furnace hole located at the front end of the TSR furnace body, a furnace rear steel tapping hole located at the rear end of the TSR furnace body and a ladle car located below the TSR furnace body, the steel tapping furnace hole is provided with a steel tapping chute, and a ladle is arranged on the ladle car.
Preferably, the tapping hole is constructed by using refractory materials.
Preferably, the steel tapping hole behind the furnace is plugged by using material furnace lining bricks.
Preferably, the tapping chute is positioned at the central line position of the forward-inclined side of the tapping furnace mouth, and the width of the tapping chute is 600 mm.
Preferably, the steel tapping chute is built by using magnesia-calcium bricks and refractory mortar.
Preferably, the ladle is provided with a hydraulic tipping device for controlling the inclination angle of the ladle.
Preferably, the steel ladle is provided with an overflow slag hole, the size of the overflow slag hole is 150mm in height and 400mm in width, and the overflow slag hole is built by refractory mortar.
Preferably, the ladle car is provided with a slag receiving disc on one inclined side of the ladle, and the distance between the slag receiving disc and the ladle is 200 mm.
A TSR furnace tapping operation method for efficient tapping is used after the TSR furnace is transformed according to the TSR furnace transformation method, and the specific operation method is as follows:
a. after the TSR furnace body finishes converting the stainless steel, rocking the TSR furnace body to a position to be tapped, and driving a ladle car to a position below a tapping furnace mouth of the TSR furnace body;
b. slowly tilting the TSR furnace body downwards, aligning the liquid steel slag flow to the center of a ladle opening, starting a ladle car by taking the position of the steel slag flow as a standard, and slowly shaking the TSR furnace body downwards until all the steel slag in the TSR furnace body flows into a ladle, wherein the whole process is finished within 90 s;
c, when steel slag in the steel ladle is close to an overflow slag hole in the process of steel tapping of the TSR furnace body, controlling a hydraulic tipping device of the ladle car to enable the steel slag in the steel ladle to flow into a slag receiving disc, and adjusting the inclination angle of the steel ladle according to the steel tapping speed of the TSR furnace body to enable the residual steel slag in the steel ladle to flow into the slag receiving disc completely;
and d, finishing tapping of the TSR furnace body, slowly adjusting the tilting angle of the steel ladle to 0 degree after all the redundant slag in the steel ladle flows into the slag receiving plate, connecting argon blowing pipelines of the steel ladle, and carrying out argon blowing stirring to wait for casting.
Compared with the prior art, the invention has the advantages that: by using the improved TSR furnace and the tapping operation method thereof, the problems of oxygenation and nitrogen increase of molten steel in the tapping process can be obviously reduced; the improved molten steel in the TSR furnace steel tapping hole increases oxygen by 5-8ppm and nitrogen by 10-20ppm, while the molten steel in the original TSR furnace steel tapping hole increases oxygen by 10-20ppm and nitrogen by 30-50ppm, thus greatly improving the purity of the molten steel; in the TSR furnace tapping process, steel slag is mixed out, liquid slag is arranged at the front end of the molten steel, the front end molten steel is prevented from contacting with air in the tapping process, the tapping time of a steel tapping furnace hole of the TSR furnace is short, the contact area of steel flow and air in the TSR furnace tapping process is reduced, the oxygen absorption and nitrogen absorption quantity of the molten steel in the tapping process is reduced, and the pollution degree of the molten steel in the tapping process is reduced.
Drawings
FIG. 1 is a schematic structural view of an efficient tapping TSR furnace and a tapping operation method thereof.
As shown in the figure: 1. a TSR furnace body; 2. tapping a furnace mouth; 4. carrying out buggy ladle; 5. tapping chute; 6. a ladle; 7. an overflow slag port; 8. a slag receiving disc.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
With reference to fig. 1, a high-efficiency steel tapping TSR furnace comprises a TSR furnace body 1, wherein the TSR furnace body 1 comprises a steel tapping furnace hole 2 located at the front end of the TSR furnace body 1, a furnace rear steel tapping hole located at the rear end of the TSR furnace body 1, and a buggy ladle 4 located below the TSR furnace body 1, the steel tapping furnace hole 2 is provided with a steel tapping chute 5, the buggy ladle 4 is provided with a steel ladle 6, the steel tapping furnace hole 2 is built by using refractory materials, the furnace rear steel tapping hole is plugged by using material lining bricks, the steel tapping chute 5 is located at the central line position of the forward tilting side of the steel tapping furnace hole 2, the steel tapping chute 5 has a width of 600mm, the steel tapping chute 5 is built by using magnesia-calcium bricks and refractory mortar, the steel ladle 6 is provided with a hydraulic tilting device for controlling the tilting angle of the steel ladle 6, the steel ladle 6 is provided with an overflow slag hole 7, and the size of the overflow hole 7 is 150mm high, the width of the steel ladle is 400mm, the overflow slag hole 7 is formed by masonry of refractory mortar, the slag receiving disc 8 is arranged on one inclined side of the steel ladle of the ladle car 4, and the distance between the slag receiving disc 8 and the steel ladle 6 is 200 mm.
Using 21180501271 heats to smelt 410S steel grade, adding 66.8 tons of dephosphorized molten iron into the TSR furnace body 1, adding 19.418 tons of high-carbon ferrochrome into the TSR furnace body 1 in the blowing process, adding 10.5 tons of lime, finishing the blowing for 75 minutes, and detecting 15.3ppm of O element before tapping; element N, 170 ppm; predicting that the molten steel amount is about 80 tons and the slag amount is about 20 tons before tapping;
rocking the TSR furnace body 1 to 86 degrees, namely, horizontally waiting for tapping; the ladle car 4 loaded with the ladle 6 is driven to a position below the TSR furnace body 1, the inclination angle of the ladle 6 is adjusted to 8 degrees, and the hole of the ladle 6 is aligned to the steel outflow position of the tapping chute 5 of the tapping furnace hole 2;
slowly rotating the TSR furnace body 1 to enable molten steel and liquid slag to flow into a ladle 6 through a steel tapping chute 5, adjusting the steel tapping speed through the furnace shaking angle, and timely starting a ladle car 4 to adjust the position of the molten steel and the liquid slag flowing into the ladle 6; (the tapping speed is ensured on the principle of accelerating the tapping speed under the condition of ensuring the safety in the tapping process)
After the liquid level of liquid slag in the steel ladle 6 reaches an overflow slag hole 7 of the steel ladle 6, the liquid slag flows into a slag receiving disc 8 through the overflow slag hole 7;
after tapping is finished within 1 minute and 10 seconds, finding that a slag layer in a steel ladle 6 is about 300mm and the slag layer is too thick, adjusting the steel ladle 6 to an inclination angle of 12 degrees through a hydraulic tilting device, and continuously flowing liquid slag in the steel ladle 6 into a slag receiving plate 8 through an overflow slag hole 7 of the steel ladle 6 until the thickness of the liquid slag in the steel ladle 6 is 190 mm;
finally, the ladle 6 is tipped to an angle of 0 degree through a hydraulic tipping device, the ladle 6 is hoisted to an LF refining furnace for molten steel refining operation, the molten steel enters the LF furnace for oxygen, nitrogen and oxygen, and the O element is detected to be 20.7 ppm; element N, 186.8 ppm; in the tapping process, the O element is added to the molten steel by 5.4ppm and the O element is added by 16.8 pmm.
Example II
21180501298 heats are used for smelting 410S steel grade, 67.9 tons of dephosphorized molten iron is added into the TSR furnace body 1, 19.8 tons of high-carbon ferrochrome are added into the TSR furnace body 1 in the blowing process, the adding amount of lime is 10.7 tons, the blowing time is finished within 76 minutes, and the O element is detected to be 16.5ppm before tapping; element N, 168 ppm; predicting that the molten steel amount is about 81.5 tons and the slag amount is about 20.5 tons before tapping;
rocking the TSR furnace body 1 to 86 degrees, namely, horizontally waiting for tapping; the ladle car 4 loaded with the ladle 6 is driven to a position below the TSR furnace body 1, the inclination angle of the ladle 6 is adjusted to 7 degrees, and the hole of the ladle 6 is aligned to the steel outflow position of the tapping chute 5 of the tapping furnace hole 2;
slowly rotating the TSR furnace body 1 to enable molten steel and liquid slag to flow into a ladle 6 through a steel tapping chute 5, adjusting the steel tapping speed through the furnace shaking angle, and timely starting a ladle car 4 to adjust the position of the molten steel and the liquid slag flowing into the ladle 6; (the tapping speed is ensured on the principle of accelerating the tapping speed under the condition of ensuring the safety in the tapping process;)
After the liquid level of liquid slag in the steel ladle 6 reaches an overflow slag hole 7 of the steel ladle 6, the liquid slag flows into a slag receiving disc 8 through the overflow slag hole 7;
after tapping is finished within 1 minute and 12 seconds, finding that a slag layer in the steel ladle 6 is about 280mm and the slag layer is too thick, adjusting the steel ladle 6 to an inclination angle of 11 degrees through a hydraulic tilting device, and continuously flowing liquid slag in the steel ladle 6 into a slag receiving plate 8 through an overflow slag hole 7 of the steel ladle 6 until the thickness of the liquid slag in the steel ladle 6 is 190 mm;
finally, the ladle 6 is tipped to an angle of 0 degree through a hydraulic tipping device, the ladle 6 is hoisted to an LF refining furnace for molten steel refining operation, the molten steel enters the LF furnace for oxygen, nitrogen and oxygen, and the O element is detected to be 21.8 ppm; element N, 185.3 ppm; in the tapping process, the O element is added to the molten steel by 5.3ppm and the O element is added by 17.3 pmm.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a high-efficient tapping TSR stove, includes TSR stove body (1), its characterized in that: TSR stove body (1) including be located TSR stove body (1) front end tap-off hole (2), be located TSR stove body (1) rear end tap-off hole behind the stove and be located TSR stove body (1) below buggy ladle (4), tap-off hole (2) be equipped with tapping chute (5), buggy ladle (4) on be equipped with ladle (6).
2. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the tapping furnace mouth (2) is built by refractory materials.
3. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the steel tapping hole behind the furnace is plugged by using material furnace lining bricks.
4. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the steel tapping chute (5) is positioned at the central line position of the forward-inclined side of the steel tapping furnace mouth (2), and the width of the steel tapping chute (5) is 600 mm.
5. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the steel tapping chute (5) is built by using magnesia-calcium bricks and refractory mortar.
6. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the ladle (6) is provided with a hydraulic tipping device for controlling the inclination angle of the ladle (6).
7. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the steel ladle (6) is provided with an overflow slag hole (7), the size of the overflow slag hole (7) is 150mm in height and 400mm in width, and the overflow slag hole (7) is formed by masonry of refractory mortar.
8. A high efficiency tapping TSR furnace as claimed in claim 1, wherein: the ladle car (4) is provided with a slag receiving disc (8) on one inclined side of the ladle, and the distance between the slag receiving disc (8) and the ladle (6) is 200 mm.
9. A TSR furnace tapping operation method for efficient tapping is used after the TSR furnace is transformed according to the TSR furnace transformation method, and the specific operation method is as follows:
a. after the TSR furnace body (1) finishes converting the stainless steel, the TSR furnace body (1) is shaken to a position to be tapped, and a ladle car (4) is driven to a position below a tapping furnace hole (2) of the TSR furnace body (1);
b. slowly tilting the TSR furnace body (1) downwards, aligning the liquid steel slag flow to the center of a ladle (6) port, starting a ladle car (4) by taking the position of the steel slag flow as a standard, and slowly shaking the TSR furnace body (1) downwards until all the steel slag in the TSR furnace body (1) flows into a ladle (6), wherein the whole process is completed within 90 s;
c, when the steel slag in the ladle (6) approaches an overflow slag hole (7) in the tapping process of the TSR furnace body (1), controlling a hydraulic tipping device of the ladle car (4) to enable the steel slag in the ladle (6) to flow into a slag receiving disc (8), and adjusting the inclination angle of the ladle (6) according to the tapping speed of the TSR furnace body (1) to enable the residual steel slag in the ladle (6) to completely flow into the slag receiving disc (8);
and d, finishing tapping of the TSR furnace body (1), slowly adjusting the tilting angle of the steel ladle (6) to 0 degree after all the redundant slag in the steel ladle (6) flows into the slag receiving disc (8), connecting argon blowing pipelines of the steel ladle (6), and blowing argon to stir to wait for casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980897.7A CN110863079A (en) | 2018-08-27 | 2018-08-27 | Efficient steel tapping TSR furnace and steel tapping operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980897.7A CN110863079A (en) | 2018-08-27 | 2018-08-27 | Efficient steel tapping TSR furnace and steel tapping operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110863079A true CN110863079A (en) | 2020-03-06 |
Family
ID=69651356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810980897.7A Pending CN110863079A (en) | 2018-08-27 | 2018-08-27 | Efficient steel tapping TSR furnace and steel tapping operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110863079A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485104A (en) * | 2020-05-18 | 2020-08-04 | 攀钢集团钒钛资源股份有限公司 | Tilting furnace for smelting ferrovanadium by electro-aluminothermic process |
-
2018
- 2018-08-27 CN CN201810980897.7A patent/CN110863079A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485104A (en) * | 2020-05-18 | 2020-08-04 | 攀钢集团钒钛资源股份有限公司 | Tilting furnace for smelting ferrovanadium by electro-aluminothermic process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113930574B (en) | Slag splashing fettling method beneficial to furnace bottom maintenance | |
| CN111635977B (en) | Full-continuous ultrashort electric arc furnace steelmaking flow production equipment and process | |
| CN111304405A (en) | Method for accurately controlling superheat degree of molten steel in tundish by LF (ladle furnace) | |
| CN110863079A (en) | Efficient steel tapping TSR furnace and steel tapping operation method thereof | |
| CN111549203A (en) | RH refining method for reducing temperature drop of molten steel and cold steel in vacuum chamber | |
| CN111254253B (en) | Method for improving pouring amount of dephosphorization residues in dephosphorization period of converter double-residue process | |
| ZA200109971B (en) | Method for conditioning slag with the addition of metallurgical residual materials and an installation for the same. | |
| CN110396637B (en) | Process for producing SPHC with low cost, short flow and high efficiency | |
| CN104988270A (en) | Method for smelting pipeline steel with low cost | |
| CN106111970A (en) | A kind of device and method being reduced ladle top slag oxidisability by excessive slag method | |
| CN100999773A (en) | Rotating steel ladle refining furnace | |
| CN110468256B (en) | Pretreatment process for desiliconizing, dephosphorizing and desulfurizing molten iron by KR-OB method | |
| CN106048133B (en) | Reduce the smelting process of molten steel inclusion in steel-casting smelting process | |
| CN206438158U (en) | A kind of two step lead smelting process devices | |
| CN115044730B (en) | Control method for 150t converter high-phosphorus high-silicon double-slag model | |
| CN115287389B (en) | Smelting method for converter with less slag | |
| CN100425706C (en) | Self patching method for rotary furnace lining | |
| US4139368A (en) | Metallurgical method | |
| CN210506423U (en) | Special-shaped combined intermediate frequency furnace | |
| CN115287407B (en) | Method for controlling continuous casting surplus recovery slag splashing | |
| JP3747880B2 (en) | Hot metal pretreatment method | |
| RU2797794C1 (en) | Method for producing cast iron by method of continuous liquid phase reduction | |
| CN114854927B (en) | Method for opening large converter | |
| CN116334342B (en) | Method for reducing slag accumulation of overhead water tank of converter | |
| CN2040910U (en) | Single suction nozzle vacuum refining equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |