CN112442570A - Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process - Google Patents
Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process Download PDFInfo
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- CN112442570A CN112442570A CN202011494315.8A CN202011494315A CN112442570A CN 112442570 A CN112442570 A CN 112442570A CN 202011494315 A CN202011494315 A CN 202011494315A CN 112442570 A CN112442570 A CN 112442570A
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- ladle
- ferrotitanium
- steel
- argon
- pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 164
- 239000010959 steel Substances 0.000 title claims abstract description 164
- 229910001200 Ferrotitanium Inorganic materials 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000008569 process Effects 0.000 title claims abstract description 46
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 212
- 229910052786 argon Inorganic materials 0.000 claims abstract description 106
- 238000007664 blowing Methods 0.000 claims abstract description 80
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000010936 titanium Substances 0.000 claims description 48
- 238000010079 rubber tapping Methods 0.000 claims description 39
- 229910052719 titanium Inorganic materials 0.000 claims description 33
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 31
- 229910045601 alloy Inorganic materials 0.000 claims description 24
- 239000000956 alloy Substances 0.000 claims description 24
- 238000009749 continuous casting Methods 0.000 claims description 22
- 238000005275 alloying Methods 0.000 claims description 15
- 238000003723 Smelting Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000005381 potential energy Methods 0.000 claims description 6
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 2
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims description 2
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000011084 recovery Methods 0.000 description 9
- 239000010955 niobium Substances 0.000 description 6
- 229910052758 niobium Inorganic materials 0.000 description 5
- 238000007670 refining Methods 0.000 description 4
- 229910052720 vanadium Inorganic materials 0.000 description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 3
- 229910000720 Silicomanganese Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- 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
- C21C7/0068—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by introducing material into a current of streaming metal
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Multimedia (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a ladle ferrotitanium adding device, which is characterized in that: the device comprises a furnace rear platform, a feeding mechanism for adding ferrotitanium, a ladle, a buggy ladle and a track, wherein the buggy ladle is arranged on the track and runs along the track, the ladle is placed on the buggy ladle, the furnace rear platform is positioned above the buggy ladle, and the feeding mechanism is arranged on the furnace rear platform. A ladle, a ladle car and a track are arranged below the platform behind the furnace, the ladle car runs on the track, and the ladle car is loaded with a ladle. The rear platform of the furnace is provided with an observation hole and a feeding mechanism, so that the ladle car can be conveniently and accurately positioned, and the rear platform of the furnace has a certain fall with the liquid level of the ladle. The bottom of the ladle is provided with an argon blowing hole, and argon enters the ladle through the argon blowing hole to form argon bubbles. The furnace rear platform is provided with a feeding observation hole, one end of the feeding mechanism is connected to the furnace rear platform, the other end of the feeding mechanism penetrates through the feeding observation hole to be communicated with the steel ladle, and the lowest end of the feeding mechanism is higher than the liquid level of molten steel in the steel ladle. The invention also discloses a ladle ferrotitanium adding process.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a steel ladle ferrotitanium adding device and a steel ladle ferrotitanium adding process.
Background
Generally, metal titanium (Ti) forms very stable TiN at high temperature, and fine and dispersed Ti (C, N) compounds precipitated at high temperature can inhibit the growth of high-temperature austenite grains in the heating process before hot working, so that the function of refining the grains is stronger. Compared with niobium (Nb) and vanadium (V), titanium (Ti) is a cheap element, and not only grains are refined in steel to improve strength and elongation performance, but also aging sensitivity and cold brittleness are reduced, and welding performance is improved. Particularly, in the production of new standard deformed steel bars, titanium (Ti) is adopted to replace noble V, Nb element for micro-alloying so as to meet the requirements of the strength and the metallographic structure of the steel bars, and under the condition of not passing through an LF furnace refining process, the cost of adding Ti in the steel is 100 yuan lower than that of adding V, Nb, so that the manufacturing cost of production enterprises can be greatly reduced; however, the chemical property of Ti element is very active, titanium contacts with slag liquid to generate chemical reaction in the process of adding ferrotitanium into a ladle, so that the loss of titanium is caused, particularly, under the condition of non-LF refining, the yield of Ti is low and unstable, the pourability of molten steel is poor, the production is difficult to control, and the development of titanium microalloying technology is limited.
Therefore, a ladle ferrotitanium adding device which does not pass through an LF furnace refining process is explored to reduce the loss of titanium and improve the yield of titanium, and the ladle ferrotitanium adding device has practical significance for promoting the development of square billet titanium microalloying technology, reducing the production cost of enterprises, improving the market competitiveness and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a steel ladle ferrotitanium adding device, which strengthens the protective pouring of continuous casting by controlling the oxygen content of molten steel in a steel ladle and controlling the adding time point and adding mode of ferrotitanium, thereby stabilizing the recovery of titanium, improving the yield of titanium, realizing the smelting and continuous casting stable production of steel containing Ti, and particularly realizing that Ti replaces the precious V, Nb element to carry out microalloying to meet the strength requirement and metallographic structure requirement of a steel bar in the production of new standard deformed steel bars. The invention further provides a steel ladle ferrotitanium adding process based on the steel ladle ferrotitanium adding device.
In order to achieve the purpose, the technical scheme of the invention is as follows: a steel ladle ferrotitanium adding device is characterized in that: the device comprises a furnace rear platform, a feeding mechanism for adding ferrotitanium, a ladle, a buggy ladle and a track, wherein the buggy ladle is arranged on the track and runs along the track, the ladle is placed on the buggy ladle, the furnace rear platform is positioned above the buggy ladle, and the feeding mechanism is arranged on the furnace rear platform.
Furthermore, a feeding observation hole is formed in the furnace rear platform, one end of the feeding mechanism is connected to the furnace rear platform, the other end of the feeding mechanism penetrates through the feeding observation hole to be communicated with the steel ladle, and the lowest end of the feeding mechanism is higher than the liquid level of molten steel in the steel ladle.
Furthermore, the feeding mechanism comprises a support and a feeding pipe, the feeding pipe is connected to the furnace rear platform through the support, one end of the feeding pipe is located above the furnace rear platform, the other end of the feeding pipe penetrates through the feeding observation hole to be communicated with the steel ladle, and the ferrotitanium is added into the steel ladle through the feeding pipe.
Furthermore, the charging tube includes receiving pipe, swift current material pipe chute and vertical charging tube, and the one end and the receiving pipe intercommunication of swift current material pipe chute, the other end and the vertical charging tube intercommunication of swift current material pipe chute, the other end and the ladle intercommunication of vertical charging tube, during ferrotitanium added from receiving pipe enters into the ladle through swift current material pipe chute and vertical charging tube, the one end of support is connected on the platform behind the stove, and the other end of support is connected and is used for supporting the charging tube on swift current material pipe chute.
Furthermore, the receiving pipe is a round pipe with a large caliber, the material sliding inclined pipe is a horn-shaped round pipe, the vertical feeding pipe is a round pipe with a small caliber, the bottom end of the vertical feeding pipe is higher than the liquid level of the molten steel in the steel ladle, and the vertical feeding pipe is aligned to the exposed area of the argon-blowing molten steel of the steel ladle.
Furthermore, the ladle ferrotitanium adding device also comprises a converter and an argon blowing station, after the converter is smelted to reach the tapping condition, the converter is rotated to incline, the molten steel is added into a ladle below a converter platform through a converter tapping hole, the ladle is transported through a ladle car, alloy is added into the ladle at the converter platform, the alloy in the ladle is finely adjusted at the argon blowing station, the specific fine adjustment condition is determined according to the component condition of the molten steel, ferrotitanium is added into the ladle at the platform behind the converter, the argon blowing station is communicated with the ladle through an argon blowing pipeline, and the argon blowing station blows argon to the molten steel in the ladle through the argon blowing pipeline in the whole tapping process and the ladle transportation process.
Based on the steel ladle ferrotitanium adding device, the invention also relates to a steel ladle ferrotitanium adding process, which comprises the following steps:
step 1, converter smelting, tapping and alloying: smelting by adopting a conventional top-bottom combined blown oxygen converter, rotating the converter to incline after the converter finishes converting and reaches a tapping condition, adding molten steel into a ladle below a converter platform through a converter tapping hole, and enabling the ladle to be located on a ladle car which runs on a track; when tapping molten steel reaches one fourth of the ladle, adding corresponding alloy into the ladle to perform molten steel deoxidation and alloying, after tapping, moving the ladle to an argon blowing station along with a ladle car through a track, and continuously performing ladle bottom argon blowing in the tapping and ladle operation processes;
Further, when the molten steel is tapped to one fourth of the steel ladle in the step 1, alloy including silicomanganese, ferrosilicon and carbon-silicon balls is sequentially added into the steel ladle for deoxidation alloying, argon is blown in the whole tapping process, the large argon flow is opened at the front and middle stages for 900NL/min, and the small argon flow is opened at the later stage for 200 NL/min.
Further, the step 2 also comprises the steps of measuring the temperature of the molten steel and sampling to analyze components when the ladle enters an argon blowing station, adjusting the flow and the temperature of argon blowing at the bottom of the ladle according to the temperature measurement condition, adding a proper amount of alloy according to the detected component condition to perform component fine adjustment, and operating the ladle to a platform behind the furnace within 2min before the ladle is prepared to be discharged for pouring after the temperature meets the process requirements and other components except titanium meet the process requirements.
Further, the ladle ferrotitanium adding process also comprises a step 4 of molten steel continuous casting: the molten steel is cast into a square billet in a whole-course protection manner on the continuous casting platform, and the molten steel can be continuously cast into 20 furnaces without the phenomenon of water gap blockage.
The technical scheme adopted by the invention has the advantages that:
1. the ladle ferrotitanium adding device provided by the invention strengthens the protective pouring of continuous casting by controlling the oxygen content of molten steel in a ladle and controlling the adding time point and adding mode of ferrotitanium, thereby stabilizing the recovery of titanium, improving the yield of titanium, realizing the smelting and continuous casting stable production of steel containing Ti, and particularly realizing that titanium (Ti) is adopted to replace precious V, Nb element to carry out micro-alloying to meet the strength requirement and metallographic structure requirement of a steel bar in the production of new standard deformed steel bars.
2. The observation hole and the feeding mechanism are arranged on the rear platform of the furnace, so that the accurate positioning of the steel ladle is facilitated, ferrotitanium is vertically added into an exposed area of argon-blown molten steel of the steel ladle, the loss of titanium is reduced, and the yield of titanium is improved; compared with the prior art, the method has the advantages that: the vertical feeding pipe of the feeding mechanism directly faces to a molten steel exposed area blown away by argon, and ferrotitanium can be directly added into the deep part of the molten steel under the action of larger gravitational potential energy through the receiving pipe, the material sliding inclined pipe and the vertical feeding pipe of the feeding mechanism without contacting with steel slag, so that titanium is less in burning loss and oxidation, and the titanium recovery rate is high.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic plan view of the general process of a ladle ferrotitanium charging apparatus according to the present invention;
FIG. 2 is a schematic front view of a ladle ferrotitanium adding device according to the present invention;
FIG. 3 is a schematic top view of the ladle ferrotitanium charging apparatus of the present invention.
The labels in the above figures are respectively: 1. a converter; 2. a ladle; 3. carrying out buggy ladle; 4. a track; 5. a furnace rear platform; 6. a charging observation hole of a platform behind the furnace; 7. a feeding mechanism; 71. a support; 72. a receiving pipe; 73. a material sliding inclined tube; 74. a vertical feed tube; 8. and (5) an argon blowing station.
Detailed Description
In the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the steel ladle ferrotitanium adding device is characterized in that: the device comprises a furnace rear platform 5, a feeding mechanism 7 for adding ferrotitanium, a ladle 2, a buggy ladle 3 and a track 4, wherein the buggy ladle 3 is arranged on the track 4 and runs along the track 4, the ladle 2 is placed on the buggy ladle 3, the furnace rear platform 5 is positioned above the buggy ladle 3, and the feeding mechanism 7 is arranged on the furnace rear platform 5. A ladle, a ladle car and a track are arranged below the platform behind the furnace, the ladle car runs on the track, and the ladle car is loaded with a ladle. The rear platform of the furnace is provided with an observation hole and a feeding mechanism, so that the ladle car can be conveniently and accurately positioned, and the rear platform of the furnace has a certain fall with the liquid level of the ladle. The bottom of the ladle is provided with an argon blowing hole 11, and argon enters the ladle 2 through the argon blowing hole 11 to form argon bubbles 12. The argon blowing station 8 is communicated with an argon blowing hole 11 at the bottom of the ladle 2 through an argon blowing pipeline.
The rear platform 5 is provided with a feeding observation hole 6, one end of a feeding mechanism 7 is connected to the rear platform 5, the other end of the feeding mechanism 7 penetrates through the feeding observation hole 6 to be communicated with the steel ladle 2, and the lowest end of the feeding mechanism 7 is higher than the liquid level of the molten steel in the steel ladle 2.
The feeding mechanism 7 comprises a support 71 and a feeding pipe, the feeding pipe is connected to the furnace rear platform 5 through the support 71, one end of the feeding pipe is located above the furnace rear platform 5, the other end of the feeding pipe penetrates through the feeding observation hole 6 to be communicated with the steel ladle 2, and ferrotitanium is added into the steel ladle 2 through the feeding pipe.
The charging tube comprises a receiving tube 72, a material sliding inclined tube 73 and a vertical charging tube 74, one end of the material sliding inclined tube 73 is communicated with the receiving tube 72, the other end of the material sliding inclined tube 73 is communicated with the vertical charging tube 74, the other end of the vertical charging tube 74 is communicated with the steel ladle 2, ferrotitanium is added from the receiving tube 72 and enters the steel ladle 2 through the material sliding inclined tube 73 and the vertical charging tube 74, one end of a support 71 is connected to the platform 5 behind the furnace, and the other end of the support 71 is connected to the material sliding inclined tube 73 and used for supporting the charging tube.
Preferably, the receiving pipe 72 is a large-caliber circular pipe, the material sliding inclined pipe 73 is a horn-shaped circular pipe, the vertical feeding pipe 74 is a small-caliber circular pipe, the bottom end of the vertical feeding pipe 74 is higher than the liquid level of the molten steel in the ladle 2, and the vertical feeding pipe 74 is aligned to the argon-blowing molten steel exposed area of the ladle.
The ladle ferrotitanium adding device also comprises a converter 1 and an argon blowing station 8, after the converter 1 is smelted to reach the tapping condition, the converter 1 is rotated to incline, the molten steel is added into a ladle 2 below a converter platform through a converter tapping hole, the ladle 2 is transported through a ladle car 3, alloy is added into the ladle 2 at the converter platform, the alloy in the ladle 2 is finely adjusted at the argon blowing station 8, and specifically, a proper amount of alloy is added into the ladle 2 for component fine adjustment according to the component condition of the molten steel at the argon blowing station 8; ferrotitanium is added into the ladle 2 at the platform behind the furnace, the argon blowing station 8 is communicated with the ladle 2 through an argon blowing pipeline, and the argon blowing station 8 blows argon to the molten steel in the ladle through the argon blowing pipeline in the whole tapping process and the ladle transferring process.
The invention also relates to a steel ladle ferrotitanium adding process based on the steel ladle ferrotitanium adding device, wherein the steel ladle ferrotitanium adding process comprises the following steps:
step 1, converter smelting, tapping and alloying: smelting by adopting a conventional top-bottom combined blown oxygen converter, rotating the converter to incline after the converter finishes converting and reaches a tapping condition, adding molten steel into a ladle below a converter platform through a converter tapping hole, and enabling the ladle to be located on a ladle car which runs on a track; when tapping molten steel to one fourth of the steel ladle, adding corresponding alloy into the steel ladle to perform molten steel deoxidation and alloying, and adding silicon-manganese, silicon-iron and carbon-silicon balls into the alloy added into the steel ladle in sequence to perform deoxidation alloying; argon is blown in the whole tapping process, the large argon flow is opened at 800 plus 900NL/min in the front and middle stages to enable the added alloy to be quickly dissolved, the small argon flow is opened at 200 plus 300NL/min in the later stage to prevent tapping slag from falling, the ladle runs to an argon blowing station along with the ladle car through a track after tapping is completed, and argon blowing is continuously carried out at the bottom of the ladle in the whole tapping process and the ladle running process to enable the alloy in the molten steel to be fully dissolved and the components and the temperature of the molten steel to be primarily homogenized;
And 4, molten steel continuous casting: the molten steel is cast into a square billet in a whole-course protection manner on the continuous casting platform, and the molten steel can be continuously cast into 20 furnaces without the phenomenon of water gap blockage.
Example one
The steel ladle ferrotitanium adding device and the process are adopted to carry out smelting and continuous casting on the Ti-containing hot-rolled ribbed steel bar with the pressure of 400MPa, and the process comprises the following process steps:
(1) steel tapping deoxidation and alloying: according to the converter smelting terminal point condition, add silicomanganese, ferrosilicon, carbon silicon ball according to the order when tapping 1/4, carry out the deoxidization alloying, tapping whole argon blowing, preceding, middle stage argon gas flow is 860NL/min, makes and adds the alloy and dissolve fast, and later stage argon gas flow is 290NL/min, and the ladle is to blowing the argon station along with the ladle car through the orbiting after the tapping is accomplished, at ladle operation in-process, carries out ladle bottom blowing argon always, and the argon gas flow is: so as to fully dissolve the alloy in the molten steel and preliminarily homogenize the components and the temperature of the molten steel.
(2) Argon blowing station fine tuning composition and temperature: when the ladle enters the argon blowing station, firstly measuring the temperature of molten steel, sampling and analyzing components, adjusting the flow and the temperature of argon blowing at the bottom of the ladle according to the temperature measurement condition, adding a proper amount of alloy according to the detected component condition for fine adjustment of the components, and operating the ladle to a platform behind the furnace after the temperature meets the process requirements and other components except titanium meet the process requirements.
(3) Adding ferrotitanium on a platform behind the furnace: after the steel ladle reaches the rear platform of the furnace, the steel ladle is observed and positioned through the feeding observation hole, so that the feeding mechanism is vertical to the feeding pipe and is aligned to the exposed area of argon-blown molten steel of the steel ladle. The feeding mechanism is adopted to add ferrotitanium, the ferrotitanium is directly added into the deep part of molten steel under the action of larger gravitational potential energy through the feeding mechanism material receiving pipe, the material sliding inclined pipe and the vertical feeding pipe, and is not contacted with steel slag, titanium burning loss and oxidation are less, the recovery rate of titanium is improved, and the recovery rate of ferrotitanium is 60%. After the ferrotitanium is added, the ladle is operated to the argon blowing station to continuously blow argon at the bottom of the ladle for 88s, then the argon blowing is finished, and the ladle is lifted out of the continuous casting platform on the argon blowing station to be cast. The steel comprises the following chemical components in percentage by mass: c: 0.20-0.25%, Si: 0.55-0.70%, Mn: 1.40-1.60%, N is less than or equal to 0.012%, P is less than or equal to 0.038%, S is less than or equal to 0.038%, Ti: 0.006 to 0.012 percent, less than or equal to 30ppm of O, and the balance of Fe and inevitable impurities.
(4) Continuous casting of molten steel: the molten steel is cast into a square billet in a whole-course protection manner on the continuous casting platform, and the molten steel can be continuously cast into 20 furnaces without the phenomenon of water gap blockage.
Example two
The steel ladle ferrotitanium adding device and the process are adopted to carry out smelting and continuous casting on the Ti-containing hot-rolled ribbed steel bar with the pressure of 400MPa, and the process comprises the following process steps:
(1) steel tapping deoxidation and alloying: according to the smelting end point condition of the converter, adding silicomanganese, ferrosilicon and carbon-silicon balls in sequence when tapping 1/4 to perform deoxidation alloying, wherein argon is blown in the whole tapping process, and the argon flows in the front and middle stages are as follows: so that the added alloy is quickly dissolved, and the later argon flow is as follows: after tapping is finished, the steel ladle moves to an argon blowing station along with the ladle car through a track, and during operation of the steel ladle, argon blowing is carried out at the bottom of the steel ladle all the time, wherein the argon flow is as follows: so as to fully dissolve the alloy in the molten steel and preliminarily homogenize the components and the temperature of the molten steel.
(2) Argon blowing station fine tuning composition and temperature: when the ladle enters the argon blowing station, firstly measuring the temperature of molten steel, sampling and analyzing components, adjusting the flow and the temperature of argon blowing at the bottom of the ladle according to the temperature measurement condition, adding a proper amount of alloy according to the detected component condition for fine adjustment of the components, and operating the ladle to a platform behind the furnace after the temperature meets the process requirements and other components except titanium meet the process requirements.
(3) Adding ferrotitanium on a platform behind the furnace: after the steel ladle reaches the rear platform of the furnace, the steel ladle is observed and positioned through the feeding observation hole, so that the feeding mechanism is vertical to the feeding pipe and is aligned to the exposed area of argon-blown molten steel of the steel ladle. The feeding mechanism is adopted to add ferrotitanium, the ferrotitanium is directly added into the deep part of molten steel under the action of larger gravitational potential energy through the feeding mechanism material receiving pipe, the material sliding inclined pipe and the vertical feeding pipe, and is not contacted with steel slag, titanium burning loss and oxidation are less, the recovery rate of titanium is improved, and the recovery rate of ferrotitanium is 63%. After the ferrotitanium is added, the ladle is operated to the argon blowing station to continuously blow argon at the bottom of the ladle for 85s, then the argon blowing is finished, and the ladle is lifted out of the continuous casting platform on the argon blowing station to be cast. The steel comprises the following chemical components in percentage by mass: c: 0.20-0.25%, Si: 0.55-0.70%, Mn: 1.40-1.60%, N is less than or equal to 0.012%, P is less than or equal to 0.038%, S is less than or equal to 0.038%, Ti: 0.006 to 0.012 percent, less than or equal to 30ppm of O, and the balance of Fe and inevitable impurities.
(4) Continuous casting of molten steel: the molten steel is cast into a square billet in a whole-course protection manner on the continuous casting platform, and the molten steel can be continuously cast into 20 furnaces without the phenomenon of water gap blockage.
As can be seen from the production process of the Ti-containing hot-rolled ribbed steel bar with the pressure of 400MPa and the examples 1 and 2, by adopting the steel ladle ferrotitanium adding device, the yield of Ti is high, the yield is 55-65%, the fluidity of molten steel is good, and the number of continuous casting furnaces can reach 20.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the technical solution of the invention or to apply the concept and technical solution of the invention directly to other occasions without modification.
Claims (10)
1. A steel ladle ferrotitanium adding device is characterized in that: the device comprises a furnace rear platform (5), a feeding mechanism (7) for adding ferrotitanium, a ladle (2), a ladle car (3) and a track (4), wherein the ladle car (3) is arranged on the track (4) and runs along the track (4), the ladle (2) is placed on the ladle car (3), the furnace rear platform (5) is positioned above the ladle car (3), and the feeding mechanism (7) is arranged on the furnace rear platform (5).
2. The ladle ferrotitanium charging device of claim 1, wherein: the feeding observation hole (6) is formed in the furnace rear platform (5), one end of the feeding mechanism (7) is connected to the furnace rear platform (5), the other end of the feeding mechanism (7) penetrates through the feeding observation hole (6) to be communicated with the steel ladle (2), and the lowest end of the feeding mechanism (7) is higher than the liquid level of molten steel in the steel ladle (2).
3. The ladle ferrotitanium charging device of claim 2, wherein: the feeding mechanism (7) comprises a support (71) and a feeding pipe, the feeding pipe is connected to the furnace rear platform (5) through the support (71), one end of the feeding pipe is located above the furnace rear platform (5), the other end of the feeding pipe penetrates through the feeding observation hole (6) to be communicated with the steel ladle (2), and ferrotitanium is added into the steel ladle (2) through the feeding pipe.
4. The ladle ferrotitanium charging device of claim 3, wherein: the feeding pipe comprises a material receiving pipe (72), a material sliding inclined pipe (73) and a vertical feeding pipe (74), one end of the material sliding inclined pipe (73) is communicated with the material receiving pipe (72), the other end of the material sliding inclined pipe (73) is communicated with the vertical feeding pipe (74), the other end of the vertical feeding pipe (74) is communicated with the steel ladle (2), ferrotitanium is added from the material receiving pipe (72) and enters the steel ladle (2) through the material sliding inclined pipe (73) and the vertical feeding pipe (74), one end of a support (71) is connected to the furnace rear platform (5), and the other end of the support (71) is connected to the material sliding inclined pipe (73) and used for supporting the feeding pipe.
5. The ladle ferrotitanium charging device of claim 4, wherein: the receiving pipe (72) is a round pipe with a large caliber, the material sliding inclined pipe (73) is a horn-shaped round pipe, the vertical feeding pipe (74) is a round pipe with a small caliber, the bottom end of the vertical feeding pipe (74) is higher than the liquid level of the molten steel in the steel ladle (2), and the vertical feeding pipe (74) is aligned to the exposed area of the argon-blowing molten steel of the steel ladle.
6. A ladle titanium iron adding device as claimed in any one of claims 3 to 5, wherein: the ladle ferrotitanium adding device further comprises a converter (1) and an argon blowing station (8), after the converter (1) is smelted to reach a tapping condition, the converter (1) is rotated to incline, molten steel is added into a ladle (2) below a converter platform through a converter tapping hole, the ladle (2) is transported through a ladle car (3), alloy is added into the ladle (2) at the converter platform, the alloy in the ladle (2) is finely adjusted at the argon blowing station (8), ferrotitanium is added into the ladle (2) at a platform behind the converter, the argon blowing station (8) is communicated with the ladle (2) through an argon blowing pipeline, and the argon blowing station (8) blows argon to the molten steel in the ladle through the argon blowing pipeline in the whole tapping process and the ladle transporting process.
7. A steel ladle ferrotitanium adding process is characterized in that: the ladle ferrotitanium adding device based on any one of claims 1 to 6, wherein the ladle ferrotitanium adding process comprises the following steps:
step 1, converter smelting, tapping and alloying: smelting by adopting a conventional top-bottom combined blown oxygen converter, rotating the converter to incline after the converter finishes converting and reaches a tapping condition, adding molten steel into a ladle below a converter platform through a converter tapping hole, and enabling the ladle to be located on a ladle car which runs on a track; when tapping molten steel reaches one fourth of the ladle, adding corresponding alloy into the ladle to perform molten steel deoxidation and alloying, after tapping, moving the ladle to an argon blowing station along with a ladle car through a track, and continuously performing ladle bottom argon blowing in the tapping and ladle operation processes;
step 2, fine adjustment of components and temperature of the argon blowing station: after the ladle is transferred to an argon blowing station, continuously blowing argon at the bottom of the ladle in the argon blowing station to further homogenize the components and the temperature, and finely adjusting the components and the temperature;
step 3, adding ferrotitanium on a platform behind the furnace: after the steel ladle reaches the rear platform of the furnace, observing and positioning the steel ladle through a feeding observation hole, and enabling a feeding mechanism to be vertical to a feeding pipe to align to an exposed area of argon-blown molten steel of the steel ladle; the feeding mechanism is adopted to add ferrotitanium, and the ferrotitanium is directly added into the deep part of molten steel under the action of larger gravitational potential energy through a receiving pipe, a material sliding inclined pipe and a vertical feeding pipe of the feeding mechanism, is not contacted with steel slag, and has less titanium burning loss and oxidation; after the ferrotitanium is added, the ladle is operated to an argon blowing station to continuously blow argon at the bottom of the ladle for 60-100 s, then the argon blowing is finished, and the ladle is lifted out of a continuous casting platform on the argon blowing station to be cast.
8. The ladle ferrotitanium adding process of claim 7, wherein: and (2) when the molten steel is tapped to one fourth of the ladle in the step (1), alloy comprising silicon manganese, silicon iron and carbon silicon balls is sequentially added into the ladle for deoxidation alloying, argon is blown in the whole tapping process, the flow of large argon is 800 plus 900NL/min in the front and middle stages, and the flow of small argon is 200 plus 300NL/min in the later stage.
9. The ladle ferrotitanium adding process of claim 8, wherein: and 2, when the ladle enters the argon blowing station, firstly measuring the temperature of the molten steel, sampling and analyzing components, adjusting the flow and the temperature of argon blowing at the bottom of the ladle according to the temperature measurement condition, adding a proper amount of alloy according to the detected component condition for fine adjustment of the components, and after the temperature meets the process requirement and other components except titanium meet the process requirement, preparing to go out of the station for pouring within the first 2min, and operating the ladle to a platform behind the furnace.
10. The ladle ferrotitanium adding process of claim 9, wherein: the ladle ferrotitanium adding process also comprises a step 4 of molten steel continuous casting: the molten steel is cast into a square billet in a whole-course protection manner on the continuous casting platform, and the molten steel can be continuously cast into 20 furnaces without the phenomenon of water gap blockage.
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| CN202011033320.9A CN112111626A (en) | 2020-09-27 | 2020-09-27 | Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process |
| CN2020110333209 | 2020-09-27 |
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| CN202023056105.9U Active CN213977771U (en) | 2020-09-27 | 2020-12-17 | Steel ladle ferrotitanium adding device |
| CN202011494315.8A Pending CN112442570A (en) | 2020-09-27 | 2020-12-17 | Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process |
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| CN202023056105.9U Active CN213977771U (en) | 2020-09-27 | 2020-12-17 | Steel ladle ferrotitanium adding device |
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| CN113897473A (en) * | 2021-08-20 | 2022-01-07 | 江阴兴澄特种钢铁有限公司 | Control device and method for alloy adding speed of electric furnace EBT steel tapping feeding pipe |
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| CN112111626A (en) * | 2020-09-27 | 2020-12-22 | 新余钢铁股份有限公司 | Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201756307U (en) * | 2010-08-20 | 2011-03-09 | 山东泰山钢铁集团有限公司 | Charging chute for steelmaking |
| KR20160120149A (en) * | 2015-04-07 | 2016-10-17 | 안성대 | The addition Method of titanium for steel alloy |
| CN110106446A (en) * | 2019-06-24 | 2019-08-09 | 新余钢铁股份有限公司 | A kind of 400MPa grades of hot rolled ribbed bars containing Ti and its production technology |
| CN110701913A (en) * | 2018-07-09 | 2020-01-17 | 代军峰 | Refining furnace scrap steel preheating and feeding device |
| CN111235342A (en) * | 2020-02-28 | 2020-06-05 | 中冶南方工程技术有限公司 | Steel ladle argon blowing station scrap steel feeding system and method |
| CN112111626A (en) * | 2020-09-27 | 2020-12-22 | 新余钢铁股份有限公司 | Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process |
-
2020
- 2020-09-27 CN CN202011033320.9A patent/CN112111626A/en not_active Withdrawn
- 2020-12-17 CN CN202023056105.9U patent/CN213977771U/en active Active
- 2020-12-17 CN CN202011494315.8A patent/CN112442570A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201756307U (en) * | 2010-08-20 | 2011-03-09 | 山东泰山钢铁集团有限公司 | Charging chute for steelmaking |
| KR20160120149A (en) * | 2015-04-07 | 2016-10-17 | 안성대 | The addition Method of titanium for steel alloy |
| CN110701913A (en) * | 2018-07-09 | 2020-01-17 | 代军峰 | Refining furnace scrap steel preheating and feeding device |
| CN110106446A (en) * | 2019-06-24 | 2019-08-09 | 新余钢铁股份有限公司 | A kind of 400MPa grades of hot rolled ribbed bars containing Ti and its production technology |
| CN111235342A (en) * | 2020-02-28 | 2020-06-05 | 中冶南方工程技术有限公司 | Steel ladle argon blowing station scrap steel feeding system and method |
| CN112111626A (en) * | 2020-09-27 | 2020-12-22 | 新余钢铁股份有限公司 | Steel ladle ferrotitanium adding device and steel ladle ferrotitanium adding process |
| CN213977771U (en) * | 2020-09-27 | 2021-08-17 | 新余钢铁股份有限公司 | Steel ladle ferrotitanium adding device |
Non-Patent Citations (2)
| Title |
|---|
| 罗莉萍 等: "《炼钢生产》", vol. 1, 29 February 2016, 冶金工业出版社, pages: 192 - 195 * |
| 陆宏祖 等: "《电炉炼钢问答》", vol. 1, 31 March 2012, 冶金工业出版社, pages: 156 - 157 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113897473A (en) * | 2021-08-20 | 2022-01-07 | 江阴兴澄特种钢铁有限公司 | Control device and method for alloy adding speed of electric furnace EBT steel tapping feeding pipe |
| CN113897473B (en) * | 2021-08-20 | 2023-03-07 | 江阴兴澄特种钢铁有限公司 | Control device and method for alloy adding speed of electric furnace EBT steel tapping feeding pipe |
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| CN112111626A (en) | 2020-12-22 |
| CN213977771U (en) | 2021-08-17 |
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