CN204661756U - A kind of control tapping process molten steel nitrogen pick-up device - Google Patents
A kind of control tapping process molten steel nitrogen pick-up device Download PDFInfo
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- CN204661756U CN204661756U CN201520367242.4U CN201520367242U CN204661756U CN 204661756 U CN204661756 U CN 204661756U CN 201520367242 U CN201520367242 U CN 201520367242U CN 204661756 U CN204661756 U CN 204661756U
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- argon gas
- argon
- blocking
- cylindrical
- molten steel
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Abstract
The utility model discloses a kind of control tapping process molten steel nitrogen pick-up device, comprise cylindrical argon blocking, electronic trip valve and electric flow control valve, cylindrical argon blocking is enclosed within tap hole, and its lower end is uniformly distributed 2 argon blocking annulus in multiple staggered arrangement argon gas hole; Evenly be crisscross arranged in cylindrical argon blocking argon gas pipeline that is multiple and argon gas hole UNICOM; The external argon gas metallic hose of argon gas pipeline is connected with argon gas source, the electronic trip valve of argon gas connection by metal hose and electric flow control valve.Control method opens pipeline argon gas before comprising tapping; Successively open interior annulus and outer toroid argon gas during tapping, form two layers of cone argon gas blanketing; Adjustment electric flow control valve controls nitrogen size; Tapping terminates to close electronic trip valve.The utility model surrounds molten steel steel by two argon gas cones and slips, and realizes the effect controlling the nitrogen pick-up of tapping process molten steel, has that structure is simple, cheap, method is simple to operate, the advantage of successful.
Description
Technical field
The utility model relates to a kind of device preventing molten steel nitrogen pick-up, belongs to converter steelmaking equipment technical field.
Background technology
Along with the development and progression of steel-making science and technology, client requires more and more higher to the purity of steel.In molten steel, five endanger element N, H, O, P, S sum preferably about about 100ppm greatly, and wherein N element content is at about 30ppm, becomes the bottleneck factor that Molten Steel Cleanliness improves further.Converter steelmaking is divided into dress iron, smelting, taps, spatters the processes such as slag, deslagging, fettling, empty stove wait, due to the essential substance that nitrogen is in air, be easy to be inhaled into molten steel to continuous casting production process from steel-making, particularly the air of tapping process molten steel directly contacts, more easily inhale nitrogen, converter tapping process nitrogen pick-up generally at 10-20PPm, and is difficult to remove with the method for chemical reaction under normal conditions, therefore, the difficult problem that the nitrogen pick-up of tapping process molten steel is steelmaking process is always controlled.Traditional tapping process nitrogen pick-up that prevents has two kinds of modes: a rounding of steel stream when being by safeguarding that external orifice of steel-tapping hole ensures tapping, prevents absorption of nitrogen by steel; Two is utilize oxygen to be surface active element in molten steel, and when steel oxygen content in water height, mass transfer coefficient is little, reduces molten steel amount of nitrogen sucking; Mainly there are three problems in traditional control tapping process nitrogen pick-up: 1) often safeguards external orifice of steel-tapping hole, need take the converter smelting cycle, affect rhythm of production, and external orifice of steel-tapping hole maintenance effects is difficult to ensure; 2) converter terminal oxygen is high, the micro-deoxidation of tapping process, causes tapping difficulty; When terminal oxygen level is low, lack the requisite measure preventing tapping nitrogen pick-up; 3) time length of tapping is comparatively large on tapping process nitrogen pick-up impact, and particularly the new tap hole tapping time is longer, and low nitrogen steel is produced and is difficult to ensure.
Summary of the invention
Technical problem to be solved in the utility model is the defect existed for prior art, provides a kind of device controlling molten steel nitrogen pick-up in converter tapping process.
For solving this technical problem, the utility model provides a kind of control tapping process molten steel nitrogen pick-up device, comprise cylindrical argon blocking, electronic trip valve and electric flow control valve, described cylindrical argon blocking is the central column that centre is provided with cylindrical space, cylindrical argon blocking is enclosed within converter taphole, in it, front cover forms with converter taphole outer sealing surface the trim matched, cylindrical argon blocking top is connected with converter taphole external stability by four bolts, and bottom and converter taphole outside weldings are fixed; The lower surface of described cylindrical argon blocking comprises annulus I and argon blocking outer toroid II in concentric argon blocking, in described argon blocking, annulus I is uniformly distributed multiple argon gas hole I, argon blocking outer toroid II is uniformly distributed multiple argon gas hole II, argon gas hole I and argon gas hole II staggered arrangement; The column wall interior of central column cylindrical argon blocking and outside are evenly crisscross arranged multiple argon gas pipeline I and argon gas pipeline II, described argon gas pipeline I is communicated with converter taphole with argon gas hole I be outward-dipping, and argon gas pipeline II is communicated with converter taphole with argon gas hole II be outward-dipping; Described ar gas passage I is connected with argon gas source I and argon gas source II respectively with the external argon gas metallic hose in ar gas passage II upper end, and argon gas metallic hose the inner connects electronic trip valve, and outer end connects electric flow control valve.
In described argon blocking, annulus I is uniformly distributed 4 argon gas holes I, argon blocking outer toroid II is uniformly distributed 4 argon gas holes II, the staggered 45 ° of layouts in argon gas hole I and argon gas hole II.
The aperture setting range of described electric flow control valve is 50% ~ 99%.
Beneficial effect: argon seal off device of the present utility model is arranged on tap hole, tapping process carries out Argon isolation to steel water and air, inside and outside two concentric circle holes form inside and outside two argon gas cones respectively, make argon stream surround molten steel steel to slip, effectively avoid molten steel exposed generation secondary oxidation in atmosphere, thus realize the effect controlling the nitrogen pick-up of tapping process molten steel; The utility model carries out Argon isolation to tapping process to molten steel by the argon seal off device being arranged on tap hole, nitrogen size is controlled by electric flow control valve, meet the requirement of different tap hole stove number and steel grade, the utility model has that structure is simple, cheap, method is simple to operate, the advantage of successful, remarkable reduction molten steel nitrogen increased amount, has dissemination.
Accompanying drawing explanation
Fig. 1 is internal structure schematic diagram of the present utility model;
Fig. 2 is structural representation vertical view of the present utility model.
In figure: argon gas hole II, annulus I, 9 argon blocking outer toroid II, 10 argon gas hole I, 11 in 1 cylindrical argon blocking, 2 converter tapholes, 3 electronic trip valves, 4 electric flow control valves, 5 argon gas metallic hoses, 6 argon gas pipeline I, 7 argon gas pipeline II, 8 argon blockings.
Embodiment
Converter steelmaking is divided into dress iron, smelting, taps, spatters the processes such as slag, deslagging, fettling, empty stove wait, and the utility model relates to converter tapping process.
Below in conjunction with drawings and Examples, the utility model is specifically described.
Figure 1 shows that internal structure schematic diagram of the present utility model.
Figure 2 shows that structural representation vertical view of the present utility model.
The utility model comprises cylindrical argon blocking 1, electronic trip valve 3 and electric flow control valve 4.
Described cylindrical argon blocking 1 is the middle central column being provided with cylindrical space, cylindrical argon blocking 1 is enclosed within converter taphole 2, in it, front cover forms with converter taphole 2 outer sealing surface the trim matched, cylindrical argon blocking 1 top is connected with converter taphole 2 external stability by four bolts, bottom and converter taphole 2 outside weldings are fixed, and ensure cylindrical argon blocking 1 not slippage in tapping process.
The lower surface of described cylindrical argon blocking 1 comprises annulus I 8 and argon blocking outer toroid II 9 in concentric argon blocking, in described argon blocking, annulus I 8 is uniformly distributed multiple argon gas hole I 10, argon blocking outer toroid II 9 is uniformly distributed multiple argon gas hole II 11, argon gas hole I 10 and argon gas hole II 11 staggered arrangement, form inside and outside two argon gas cones, than being positioned at the isolated better effects if that on same annulus, the densely covered argon gas ring formed slips to molten steel steel.
In described argon blocking, annulus I 8 is uniformly distributed 4 argon gas holes I 10, argon blocking outer toroid II 9 is uniformly distributed 4 argon gas holes II 11, the staggered 45 ° of layouts in argon gas hole I 10 and argon gas hole II 11, this setting both can meet processing requirement, reached again minimizing work program.
The column wall interior of cylindrical argon blocking 1 and outside are evenly crisscross arranged and the argon gas pipeline I 6 of the quantity such as argon gas hole I 10 and argon gas hole II 11 and argon gas pipeline II 7, described argon gas pipeline I 6 is communicated with argon gas hole I 10 with converter taphole 2 in outward-dipping, argon gas pipeline II 7 is communicated with argon gas hole II 11 with converter taphole 2 in outward-dipping, when realizing tapping, argon stream encirclement molten steel steel slips, inside and outside two concentric circle holes, form inside and outside two argon gas cones respectively, contact with air before preventing molten steel from entering ladle, produce secondary oxidation.
Described ar gas passage I 6 is connected with argon gas source I and argon gas source II respectively with the external argon gas metallic hose 5 in ar gas passage II 7 upper end, argon gas metallic hose 5 the inner connects electronic trip valve 3, outer end connects electric flow control valve 4, different steel grades and tap hole when realizing tapping, adopt the sealing that different uninterrupteds realizes tapping process molten steel, and then save nitrogen consumption.
The aperture setting range of described electric flow control valve 4 is 50% ~ 99%, and specifically according to tap hole stove number and steel grade, concrete numerical value is determined in the requirement to nitrogen, both can realize the effect controlling the nitrogen pick-up of tapping process molten steel, and again save argon gas consumption.
Principle of work of the present utility model and working process:
When converter prepares before tapping: open the pipeline argon gas on ladle, purge the air of ladle inside, ladle inside and top is made to be full of argon gas;
When preparing tapping: first open argon gas source I, argon gas through ar gas passage I 6 by argon gas hole I 10, make tapping process steel slip through region be full of argon gas, form one deck cone argon shield simultaneously, realize isolated air once sealing; Then open argon gas source II, argon gas by argon gas hole II 11, forms second layer cone argon shield through ar gas passage II 7, realizes isolated air secondary sealing.
Described cylindrical argon blocking 1 argon gas pipeline pressure meets the effective airflow cannon-shot of converter taphole 2 collar extension to steel ladle edge about 1.5 meters, realizes the available protecting of molten steel tap hole to steel ladle edge.
Because tap hole stove number is different, molten steel steel stream rounding degree varies sample during the tapping of converter taphole 2 collar extension, therefore, according to tap hole stove number, the electric flow control valve 4 on adjustment argon gas pipeline controls nitrogen size:
During 1-40 stove, electric flow control valve 4 reaches 50%;
During 41-70 stove, electric flow control valve 4 reaches 70%;
During 71-100 stove, electric flow control valve 4 reaches 99%;
When producing ultralow nitrogen steel grade, no matter tap hole stove number, electric flow control valve 4 directly reaches 99%;
Produce when steel grade do not require to nitrogen, close the electronic trip valve 3 on nitrogen pipeline;
Converter tapping terminates, and directly closes the electronic trip valve 3 on nitrogen pipeline.
The utility model utilizes tapping process to carry out Argon isolation to steel water and air, effectively avoid molten steel exposed in atmosphere, thus realize the effect controlling the nitrogen pick-up of tapping process molten steel, and by controlling argon gas, both good sealing effectiveness had been achieved, again save argon gas consumption, the utility model structure is simple, cheap, easy to use, effective, has dissemination.
The above-mentioned embodiment of the utility model, just illustrates, is not only, and all changes within the scope of the utility model or in equivalent scope of the present utility model are all surrounded by the utility model.
Claims (3)
1. one kind controls tapping process molten steel nitrogen pick-up device, it is characterized in that: comprise cylindrical argon blocking (1), electronic trip valve (3) and electric flow control valve (4), described cylindrical argon blocking (1) is the middle central column being provided with cylindrical space, cylindrical argon blocking (1) is enclosed within converter taphole (2), in it, front cover forms with converter taphole (2) outer sealing surface the trim matched, cylindrical argon blocking (1) top is connected with converter taphole (2) external stability by four bolts, bottom and converter taphole (2) outside weldings are fixed, the lower surface of described cylindrical argon blocking (1) comprises annulus I (8) and argon blocking outer toroid II (9) in concentric argon blocking, annulus I (8) is uniformly distributed multiple argon gas hole I (10) in described argon blocking, argon blocking outer toroid II (9) is uniformly distributed multiple argon gas hole II (11), argon gas hole I (10) and argon gas hole II (11) staggered arrangement, the column wall interior of central column cylindrical argon blocking (1) and outside are evenly crisscross arranged multiple argon gas pipeline I (6) and argon gas pipeline II (7), described argon gas pipeline I (6) is communicated with converter taphole (2) in outward-dipping with argon gas hole I (10), argon gas pipeline II (7) is communicated with argon gas hole II (11) with converter taphole (2) in outward-dipping, described ar gas passage I (6) is connected with argon gas source I and argon gas source II respectively with the external argon gas metallic hose (5) in ar gas passage II (7) upper end, argon gas metallic hose (5) the inner connects electronic trip valve (3), and outer end connects electric flow control valve (4).
2. control tapping process molten steel nitrogen pick-up device according to claim 1, it is characterized in that: in described argon blocking, annulus I (8) is uniformly distributed 4 argon gas holes I (10), argon blocking outer toroid II (9) is uniformly distributed 4 argon gas holes II (11), the staggered 45 ° of layouts in argon gas hole I (10) and argon gas hole II (11).
3. control tapping process molten steel nitrogen pick-up device according to claim 1 and 2, is characterized in that: the aperture setting range of described electric flow control valve (4) is 50% ~ 99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367242.4U CN204661756U (en) | 2015-06-01 | 2015-06-01 | A kind of control tapping process molten steel nitrogen pick-up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367242.4U CN204661756U (en) | 2015-06-01 | 2015-06-01 | A kind of control tapping process molten steel nitrogen pick-up device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204661756U true CN204661756U (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520367242.4U Withdrawn - After Issue CN204661756U (en) | 2015-06-01 | 2015-06-01 | A kind of control tapping process molten steel nitrogen pick-up device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204661756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831017A (en) * | 2015-06-01 | 2015-08-12 | 山东钢铁股份有限公司 | Liquid steel nitrogen increasing device and method for controlling steel tapping procedures |
-
2015
- 2015-06-01 CN CN201520367242.4U patent/CN204661756U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831017A (en) * | 2015-06-01 | 2015-08-12 | 山东钢铁股份有限公司 | Liquid steel nitrogen increasing device and method for controlling steel tapping procedures |
| CN104831017B (en) * | 2015-06-01 | 2016-08-24 | 山东钢铁股份有限公司 | A kind of control tapping process molten steel nitrogen pick-up device and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150923 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |