CN100507016C - Air curtain skimming device for steel-making converter - Google Patents
Air curtain skimming device for steel-making converter Download PDFInfo
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- CN100507016C CN100507016C CNB2006101022412A CN200610102241A CN100507016C CN 100507016 C CN100507016 C CN 100507016C CN B2006101022412 A CNB2006101022412 A CN B2006101022412A CN 200610102241 A CN200610102241 A CN 200610102241A CN 100507016 C CN100507016 C CN 100507016C
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Abstract
The invention discloses a gas curtain slag device of rotary furnace in the metallurgical smelting technical domain, which consists of rotary furnace bulk and tap hole on the furnace, wherein the ring-shaped air chamber is set in the cuff brick of steel outlet hole; the ring-shaped air gap interconnects the inlet pipe of ring-shaped air chamber; the ring-shaped air chamber interconnects ring-shaped air gap with inlet pipe connecting gas source; the separation angle B of ring-shaped air gap and inner wall of outlet steel is 20-40 deg. The invention breaks the vortex from steel outlet, which outputs clean steel.
Description
Technical field
The present invention relates to a kind of steel-making device, the air curtain skimming device when tapping especially for converter steelmaking belongs to technical field of ferrous metallurgy.
Background technology
Along with the continuous development of the every technology of iron and steel metallurgical industry, converter-refining furnace and sequence casting produce choice goods the steel process application more and more widely, and the market demand of elaboration steel is increasing.In the elaboration steel was produced, lacking slag or not having slag was the important factor that obtains quality products.How controlling inclusion and make molten steel clean more, is insider's direction of making great efforts to explore for a long time.The molten steel inclusion that slag causes under the converter tapping increases, and is the difficult problem of puzzlement smelting technology more always.Each iron and steel enterprise is to the following slag control of converter tapping terminal point at present, mainly take when putting steel and soon finish, in the converter burner hearth, to add slag-blocking ball or slag stop cone, rely on slag-blocking ball (awl) density less than molten steel density, the method for blocking tap hole in the tapping later stage realizes pushing off the slag.The problem that this method exists is: owing to add the uncertainty on slag-blocking ball (awl) opportunity and the drift of slag-blocking ball (awl), the pushing off the slag rate generally only can reach about 80%, and can not control the bits that converter is involved in because of the generation eddy current in tapping process.In addition, the used refractory consumption of slag-blocking ball (awl) is bigger, thereby causes the increase of STEELMAKING PRODUCTION cost.Chinese patent 86200541 once disclosed a kind of separated gas slag-blocking apparatus, this device is provided with cylinder and slag stopping arm at converter taphole, gas piping system links to each other with slag stopping arm, utilize gas to form air curtain and realize pushing off the slag at tap hole, whole device is arranged on the converter outside, complex structure is not easy to implement.
Summary of the invention
It is effective, simple in structure that technical problem to be solved by this invention provides a kind of pushing off the slag, the air curtain skimming device that is used for converter steelmaking that is easy to realize.
The alleged problem of the present invention is solved by following technical scheme:
A kind of air curtain skimming device that is used for converter steelmaking, comprise converter body 1 and the tap hole 2 that is arranged on sidewall of the furnace body in the formation, its special feature is: the inlet pipe 6 that described tap hole sleeve brick 3 places are provided with ring-shaped air chamber 4, annular air cleft 5 and are communicated with ring-shaped air chamber, described ring-shaped air chamber is communicated with annular air cleft, inlet pipe is communicated with source of the gas, and annular air cleft and tap hole inwall included angle B are 20 °～40 °.
The above-mentioned air curtain skimming device that is used for converter steelmaking, described annular air cleft satisfies formula apart from the inner distance L of tap hole: L=R/tgB, R is the tap hole radius in the formula.
The above-mentioned air curtain skimming device that is used for converter steelmaking, described annular air cleft width is 1.5～5mm.
The above-mentioned air curtain skimming device that is used for converter steelmaking, described inlet pipe are provided with adjusts valve 7 and tensimeter 8, rate of flow meter 9.
Apparatus of the present invention are at converter taphole ring-shaped air chamber and air cleft to be set, the rare gas element that will have certain pressure causes annular air cleft place, make it to form the air curtain envelope, reach the purpose of complete pushing off the slag, rare gas element floats in dispose procedure simultaneously, destroy the whirlpool that molten steel produces when tap hole flows out, reduced molten steel volume slag situation, realized the purpose of the clean tapping of converter.Equipment therefor of the present invention is simple in structure, and it can utilize existing converter bottom blowing pipeline to connect the reservation pipeline of people's air curtain slag retaining steel outlet, transforms, newly-built and maintenance cost is all very low.Adopt apparatus of the present invention can also save a large amount of refractory consumptions, thereby reduce the production cost of converter steelmaking.In addition, apparatus of the present invention have reduced deoxygenated alloy usage quantity and refining process interalloy add-on because of having significantly reduced down slag probability of tapping, and are stable and optimized steel quality, and its indirect benefit is greater than direct benefit.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the partial enlarged view of Figure 1A portion.
Each label is among the figure: 1. converter body; 2. tap hole; 3. tap hole sleeve brick; 4. ring-shaped air chamber; 5. annular air cleft; 6. inlet pipe; 7. adjustment valve; 8. tensimeter; 9. rate of flow meter.
Embodiment
Referring to Fig. 1, Fig. 2, the formation of apparatus of the present invention comprises body of heater 1 and the inlet pipe 6 that is arranged on the tap hole 2 of sidewall of the furnace body, the ring-shaped air chamber 4 that is arranged on tap hole sleeve brick 3 places, annular air cleft 5 and is communicated with ring-shaped air chamber, ring-shaped air chamber is communicated with annular air cleft, inlet pipe is connected to the tap hole outside, and is communicated with source of the gas.The effect of ring-shaped air chamber: the one, can play stable effect of blowing people's gas pressure, the 2nd, a kind of suitable manner that inlet pipe is communicated with annular air cleft.Annular air cleft end is R/tgB apart from the optimum value of the inner distance L of tap hole, and R is the tap hole radius in the formula, and B is annular air cleft and tap hole inwall angle.The L value of determining according to following formula can make the point of crossing of the annular air curtain of formation just overlap with the tap hole end position, and molten steel just is subjected to the air curtain skimming effect immediately to the tap hole place, to reach best pushing off the slag effect.Annular air cleft and tap hole inwall included angle B are advisable with 20 °～40 °, and the best is 28 °～32 °.This angle had both been considered the manufacturing process performance, can make air curtain obtain bigger pushing off the slag power again.Annular air cleft width is 1.5～5mm, and it can be chosen according to gas flow, flow velocity.For ease of adjusting inert gas pressure and flow, inlet pipe is provided with adjusts valve 7 and tensimeter 8, rate of flow meter 9.
The used rare gas element of the present invention is nitrogen or argon gas.Because of converter steelmaking factory all is equipped with oxygenerator, nitrogen, argon gas with the source of the gas as air curtain skimming, are fully used byproduct it for making the byproduct of oxygen, do not increase the extras input.
The results showed that pushing off the slag effect of the present invention is better than common slag-blocking ball (awl), the comparative test result that following table provides, the 2# stove uses slag-blocking ball in the table, and the 3# stove uses air curtain skimming, is correlative value with thickness of slag layer in the ladle:
Claims (2)
1. air curtain skimming device that is used for converter steelmaking, comprise converter body (1) in the formation and be arranged on the tap hole (2) of sidewall of the furnace body, it is characterized in that: tap hole sleeve brick (3) is located the inlet pipe (6) that is provided with ring-shaped air chamber (4), annular air cleft (5) and is communicated with ring-shaped air chamber, described ring-shaped air chamber is communicated with annular air cleft, inlet pipe is communicated with source of the gas, annular air cleft and tap hole inwall included angle B are 20 °～40 °, described annular air cleft satisfies formula apart from the inner distance L of tap hole: L=R/tgB, the annular air cleft is wide to be 1.5～5mm, and R is the tap hole radius in the formula.
2. the air curtain skimming device that is used for converter steelmaking according to claim 1 is characterized in that: described inlet pipe is provided with adjusts valve (7) and tensimeter (8), rate of flow meter (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101022412A CN100507016C (en) | 2006-12-08 | 2006-12-08 | Air curtain skimming device for steel-making converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101022412A CN100507016C (en) | 2006-12-08 | 2006-12-08 | Air curtain skimming device for steel-making converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1962885A CN1962885A (en) | 2007-05-16 |
| CN100507016C true CN100507016C (en) | 2009-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101022412A Expired - Fee Related CN100507016C (en) | 2006-12-08 | 2006-12-08 | Air curtain skimming device for steel-making converter |
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| CN (1) | CN100507016C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993971B (en) * | 2009-08-27 | 2013-04-24 | 宝山钢铁股份有限公司 | Airflow slag blocking valve and using method thereof |
| CN101934283B (en) * | 2010-09-19 | 2012-02-01 | 中冶赛迪工程技术股份有限公司 | Dust suppression device and dust suppression method during molten iron open-air transportation |
| CN107858479A (en) * | 2017-12-20 | 2018-03-30 | 马鞍山钢铁股份有限公司 | A kind of converter tapping vortex inhibitor |
| CN114807501B (en) * | 2022-04-29 | 2023-11-17 | 湖南华菱涟源钢铁有限公司 | Converter diffuse type blowing slag-blocking steel tapping hole and application method thereof |
| CN114737008A (en) * | 2022-04-29 | 2022-07-12 | 湖南华菱涟源钢铁有限公司 | Converter circular seam type gas-blowing slag-controlling tapping method |
| CN114807495A (en) * | 2022-04-29 | 2022-07-29 | 湖南华菱涟源钢铁有限公司 | Non-shielding free tapping method for converter |
-
2006
- 2006-12-08 CN CNB2006101022412A patent/CN100507016C/en not_active Expired - Fee Related
Non-Patent Citations (6)
| Title |
|---|
| 关于单向流的三要素. 魏学孟，魏景屹.洁净与空调技术，第2期. 2000 |
| 关于单向流的三要素. 魏学孟，魏景屹.洁净与空调技术，第2期. 2000 * |
| 新型挡渣器. 续英.山西冶金，第54期. 1994 |
| 新型挡渣器. 续英.山西冶金，第54期. 1994 * |
| 转炉出钢挡渣方法. 郑新友，丛玉伟，刘平，刘美，张婕，潘辉.钢铁研究，第1期. 2000 |
| 转炉出钢挡渣方法. 郑新友，丛玉伟，刘平，刘美，张婕，潘辉.钢铁研究，第1期. 2000 * |
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| Publication number | Publication date |
|---|---|
| CN1962885A (en) | 2007-05-16 |
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