CN2712936Y - Slag free tapping converter - Google Patents
Slag free tapping converter Download PDFInfo
- Publication number
- CN2712936Y CN2712936Y CN 03279896 CN03279896U CN2712936Y CN 2712936 Y CN2712936 Y CN 2712936Y CN 03279896 CN03279896 CN 03279896 CN 03279896 U CN03279896 U CN 03279896U CN 2712936 Y CN2712936 Y CN 2712936Y
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- CN
- China
- Prior art keywords
- tapping
- converter
- slag
- steel
- shaft
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- Expired - Lifetime
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Abstract
The utility model belongs to the converter steel-making field, in particular to a slag free tapping converter. The utility model is characterized in that a tapping-box structure is additionally arranged on the position of the tapping hole of the traditional converter structure, and the tapping-box structure can be a semi-cylinder body or a semi-cone body or a square box body. The tapping box is connected and integrated with the body and the cap of the converter, and a conventional sliding water gap is arranged on the position of the tapping hole of the tapping box in order to constantly maintain the height of the molten steel in the tapping process at a level that prevents the coiled slag from entering the steel ladle. The burden of the secondary refining can be reduced when the steel-making process is performed by the slag free tapping converter, the availability ratio of the alloy and the deoxidizer can be raised, and the rate of the converter in blocking the slag is above 95%; the oxygen content in the steel is 20% lower than that of the same converter, the yield of the alloy is increased by 10%, and the consumption of the deoxidizer is reduced by 10%; besides, the utility model can be applied to the steel-making converters with different capacity.
Description
Technical field
The utility model belongs to field of steel-making, relates to the structure of converter.
Background technology
Along with modern industry development, ferrous materials has been proposed the requirement of high quality and low-cost two aspects, traditional high-quality steel production adopts electric furnace-external refining flow process to produce.But, because it is raw material that the electric furnace flow process adopts steel scrap, minimizing along with high-quality home scrap ratio, the content of harmful residual element is more and more higher in the steel, some productions have been limited to the tighter steel grade of residual element requirement, compare with the blast furnace-converter flow process simultaneously, the production cost of electric furnace flow process is higher than bof process.Because above-mentioned two deficiencies of electric furnace flow process, making the metallargist is that the technology of the blast furnace-converter flow process production high-quality steel of raw material has given very big concern to adopting molten iron.
Adopting the typical process of bof process production high-quality steel is blast furnace-hot metal pretreatment-converter-vacuum slag absorbing-ladle refining-vacuum-treat-continuous casting, for preventing that the converter oxidation sludge from entering the quality that ladle increases the burden of external refining and influences steel, the oxidation sludge that external advanced process adopts vacuum slag absorbing technology will enter ladle is removed, although this technology slagging-off efficient height, but its facility investment is also high, has limited its widespread use.At present, most steel mills enter ladle for preventing converter tapping process oxidation sludge, generally adopt measures such as slag retaining cap, slag-blocking ball and floating plug to reduce oxidation sludge and enter ladle.Simultaneously, for improving pushing off the slag efficient, some slag pushing off body that differ from one another have been designed, as notification number is that the Chinese patent of CN2510501Y has designed a kind of regular polygon slag pushing off body greater than 16, to overcome traditional slag pushing off body each face stress equalization and be difficult for being floated to the fusing of slag-blocking ball in tap hole and the pushing off the slag process and cause a large amount of shortcomings of slags down in stove. in tapping process, be in free floating condition for overcoming slag pushing off body, be difficult to arrive timely and accurately the shortcoming that tap hole carries out pushing off the slag, the planner is from the slag pushing off body structure and adopt external device (ED) that slag pushing off body is positioned the optimization that pushing off the slag technology has been carried out in two aspects, as notification number is that the Chinese patent of CN2459325 has designed a kind of mechanical pressed bolt, and adopt guiding pole structure, make the slag retainer accurate positioning; Notification number is that the Chinese patent of CN2232921 has designed a kind of Slag Shoot Ball Making Machine, to realize the accurate input of slag-blocking ball; Notification number is that the Chinese patent of CN2397125 has designed a kind of suspension type pushing off the slag rod insertion instrument, with the accurate location of realization scum rod, and improves operating environment.All these methods are all obtaining certain effect aspect the pushing off the slag effect improving, but because its starting point is still the following slag before being based on preventing to tap, and the volume slag of tapping process and the following slag after the tapping are not paid attention to, its pushing off the slag effect is still undesirable.
Summary of the invention
The purpose of this utility model has been to provide a kind of converter that realizes slag free tapping, overcome traditional converter tapping process and can't avoid down the shortcoming of oxidation sludge, realize the non-oxidation slag tapping of converter, be particularly suitable for adopting stove blast furnace-converter-external refining flow process production high-quality steel.
The technical solution of the utility model is to set up the tapping box structure in the tap hole position of traditional converter structure, the tapping box structure be in semicylinder, semicircle cone or the square box structure any, main purpose is to compile molten steel, guarantee that molten steel height certain in the tapping process is to prevent that rolling up slag brings oxidation sludge into, the tapping case joins with shaft and furnace crown, is connected as a single entity; Slide gate nozzle is installed in tap hole position at the tapping case, adopts slide gate nozzle control tapping process.When adopting the converter steelmaking of the utility model slag free tapping, can alleviate the burden of external refining, improve the utilization ratio of alloy and reductor, make converter pushing off the slag rate greater than more than 95%, oxygen content in steel reduces by 20% than identical converter, improves the recovery rate 10% of alloy, and reductor consumption reduces by 10%.The utility model can be used for the steel-making converter of various differing capacities.
Now converter is described further to the utility model slag free tapping in conjunction with the accompanying drawings.
Description of drawings
Accompanying drawing 1 shows structural representation for cuing open of the utility model slag free tapping converter.
Accompanying drawing 2 is the utility model slag free tapping converter appearance structure synoptic diagram.
Accompanying drawing 3 shows structural representation for cuing open of case of tapping.
Embodiment
Find out that by accompanying drawing 1 converter of the utility model slag free tapping is made up of furnace shell 1, furnace crown 12, shaft 13, furnace bottom 14, refractory lining 2 and tapping case 3.
The tapping case is semicylinder or semicircle cone or square box structure.Tapping case 3 joins with shaft 13 and furnace crown 12, is connected as a single entity, and in the tap hole position of tapping case slide gate nozzle is installed.Find out that by accompanying drawing 3 tapping case 3 is made of furnace shell 1, refractory material furnace lining 2, hydro-cylinder 4, connecting rod 5, brick cup 6, nozzle brick 7, the following mouth of a river 8, slide plate 9, upper slide 10 and slide gate mechanism 11.Brick cup 6 is installed in tapping case tap hole position, and nozzle brick 7 is assemblied in brick cup 6 centre holes, and from nozzle brick 7, successively fit on slide plate 10, slide plate 9 and the following mouth of a river 8 in slide gate mechanism 11.Core of the present utility model is to set up the tapping box structure and adopt slide gate nozzle control tapping process on the basis of traditional converter.
The interior molded dimension of the utility model slag free tapping converter as shown in Figure 1, shaft is that the garden is barrel-shaped, it highly is H, liner diameters is D, and below and shaft 13 liners of tapping case 3 contact E mutually are H1 to the distance of shaft 13 liner lower sections, above the case of tapping with furnace crown 12 liners mutually contact F be H2 to the distance of shaft 13 upper sections, the difference of altitude of E, F is B, the degree of depth of tapping case 3 is L, and the length of tapping case 3 bottoms is W, and the central vertical line of tapping case bottom and the angle of horizontal direction are α.There is positive and negative branch at the α angle, and α is for just when angle is above sea line, and α is for negative when angle is below sea line.
Structure, position and the size of tapping case are respectively:
H1＝0～H；H2＝0～1/3H；W＝300～1/2H；L＝0～1/3D；B＝0～1/4D；α＝-15°～+15°
The slide gate nozzle medullary ray keeps-12 °～+ 12 ° scope with the angle of the central vertical line of tapping case bottom in vertical direction, guarantees the control of tapping stream.
The concrete operations of the utility model slag free tapping converter in tapping process are as follows:
When reaching, the molten steel height of tapping case is enough to suppress because the whirling current that causes of tapping when being involved in oxidation sludge, opening slide gate nozzle taps, and constantly increase the converter flip angle according to the increase of tap, when molten steel amount in the converter reaches the molten steel that guarantees the non-involvement oxidation sludge and limits the quantity of, close slide gate nozzle rapidly, and the revolution converter is turned back to the normal position to the normal position or directly rapidly with converter, cleaning tap hole, maintenance and installation slide gate nozzle.Because the slide gate nozzle pushing off the slag is adopted in tapping in earlier stage; All the time guarantee in the tapping process that certain molten steel height has prevented the volume slag; Tapping is adopted slide gate nozzle or return tilting furnace fast and avoided time slag latter stage, thereby has guaranteed that the non-oxidation slag enters ladle in the converter tapping process.
Owing to adopt the slag free tapping technology to cause leaving in the converter slag of a certain amount of molten steel and hyperoxia voltinism, so the converter operation will adopt and stay the steel operation, for preventing splash, can add a part of lime in advance or pour out a part of oxidation sludge.When needs do not have the steel of staying operation, converter molten steel all can be gone out to the greatest extent.
Claims (3)
1, a kind of slag free tapping converter comprises furnace shell (1), furnace crown (12), shaft (13), furnace bottom (14), refractory lining (2), it is characterized in that:
(1) set up tapping case (3) in the tap hole position of converter structure, tapping case (3) joins with shaft (13) and furnace crown (12), is connected as a single entity, and in the tap hole position of tapping case (3) slide gate nozzle is installed;
(2) structure, position and the size of tapping case are respectively:
H1＝0～H，H2＝0～1/3H，W＝300～1/2H，L＝0～1/3D，B＝0～1/4D，α＝-15°～+15°，
H is a lining of shaft height, D is a lining of shaft diameter, H1 for below and shaft (13) liner of tapping case (3) mutually contact E to the distance of shaft (13) liner lower section, H2 for tapping case top and furnace crown (12) liner mutually contact F to the distance of shaft (13) upper section, B is the difference of altitude of E, F, L is the degree of depth of tapping case (3), W is the length of tapping case (3) bottom, α is the central vertical line of tapping case bottom and the angle of horizontal direction, there is positive and negative branch at the α angle, α is for just when angle is above sea line, and α is for negative when angle is below sea line.
2, slag free tapping converter according to claim 1 is characterized in that the slide gate nozzle medullary ray and the angle of the central vertical line of tapping case bottom keep-12 °～+ 12 ° scope in vertical direction.
3, slag free tapping converter according to claim 1, the box structure that it is characterized in that tapping can be in semicylinder, semicircle cone or the side's row body structure any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03279896 CN2712936Y (en) | 2003-09-23 | 2003-09-23 | Slag free tapping converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03279896 CN2712936Y (en) | 2003-09-23 | 2003-09-23 | Slag free tapping converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2712936Y true CN2712936Y (en) | 2005-07-27 |
Family
ID=34866330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03279896 Expired - Lifetime CN2712936Y (en) | 2003-09-23 | 2003-09-23 | Slag free tapping converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2712936Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299187A (en) * | 2017-07-28 | 2017-10-27 | 江苏省沙钢钢铁研究院有限公司 | Vortex-restrained slag-rolling converter steel-tapping hole and converter |
-
2003
- 2003-09-23 CN CN 03279896 patent/CN2712936Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299187A (en) * | 2017-07-28 | 2017-10-27 | 江苏省沙钢钢铁研究院有限公司 | Vortex-restrained slag-rolling converter steel-tapping hole and converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Lianyungang Paier Technology Development Co.,Ltd. Assignor: Wang Zhongying| Han Jianhuai Contract record no.: 2010320001063 Denomination of utility model: Slag free tapping converter Granted publication date: 20050727 License type: Exclusive License Record date: 20100802 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130923 Granted publication date: 20050727 |