KR910008051Y1 - Upper gas blowing lance with porous plug brick - Google Patents
Upper gas blowing lance with porous plug brick Download PDFInfo
- Publication number
- KR910008051Y1 KR910008051Y1 KR2019890004768U KR890004768U KR910008051Y1 KR 910008051 Y1 KR910008051 Y1 KR 910008051Y1 KR 2019890004768 U KR2019890004768 U KR 2019890004768U KR 890004768 U KR890004768 U KR 890004768U KR 910008051 Y1 KR910008051 Y1 KR 910008051Y1
- Authority
- KR
- South Korea
- Prior art keywords
- lance
- porous plug
- gas
- gas blowing
- plug brick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000007664 blowing Methods 0.000 title claims description 11
- 239000011449 brick Substances 0.000 title claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 27
- 230000005587 bubbling Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- 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
- C21C2250/00—Specific additives; Means for adding material different from burners or lances
- C21C2250/08—Porous plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
- F27D2003/169—Construction of the lance, e.g. lances for injecting particles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
내용 없음.No content.
Description
제1도는 래들(Ladle) 내 용강 버브링(Bubbling)조업을 나타낸 상태도로서 a : 상부가스취입 장치, b : 저부가스취입 장치1 is a state diagram showing a molten steel bubbling operation in a ladle, a: an upper gas blowing device, and b: a bottom gas blowing device.
제2도는 종래의 가수취입 랜스의 단면도로서 a : 스트레이트 타입 랜스(Straight Type Lance), b : T자형 리버스 타입 랜스(Reverse Type Lance)2 is a cross-sectional view of a conventional hydrophobic lance, a: Straight Type Lance, b: T-shaped Reverse Type Lance.
제3도는 본 고안의 T자형 리버스타입 가스취입 랜스의 단면도.3 is a cross-sectional view of the T-shaped reverse type gas injection lance of the present invention.
제4도는 본 고안의 요부확대 사시도.Figure 4 is an enlarged perspective view of the main part of the present invention.
제5도는 제3도의 A-A선 확대단면도.5 is an enlarged cross-sectional view taken along the line A-A of FIG.
제6도는 제5도의 B-B선 단면도.6 is a sectional view taken along the line B-B in FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 래들 2 : 용강1: ladle 2: molten steel
3 : 슬래그 4 : 랜스3: slag 4: lance
5 : 가스취입구 6 : 다공질 프퍼그5 gas inlet 6 porous pug
10 : 가스토출구 12 : 다공질 프러그 취부덮개 및 파이프10: gasoline outlet 12: porous plug mounting cover and pipe
본 고안은 용강 정련시 사용되는 상부가스 취입 랜스(Top Bubbling Lance)의 가스 토출구에 다공질 프러그(Porous Plug)벽돌을 취부한 T자형 리버스 타입 랜스에 관한 것이다.The present invention relates to a T-shaped reverse type lance in which a porous plug brick is attached to a gas outlet of a top bubbling lance used in refining molten steel.
연속주조 및 통상적인 주조에 의한 청정강을 생산하기 위해서는 래들내의 용강 온도의 균일화, 비금속 개재물의 부상촉진, 각종 첨가제의 균일 분산 및 반응촉진, 탈가스 처리등을 래들내에서 용강 버브링으로 실시하고 있다.In order to produce clean steel by continuous casting and normal casting, the molten steel temperature is uniformed in the ladle, the flotation of non-metallic inclusions, the uniform dispersion and reaction of various additives, and the degassing are performed by the molten steel burring in the ladle. have.
현재까지의 가스취입 방식은 제1도에 나타난 바와같이 상부가스취입(Top Bubbling)방식으로서 래들(11)내의 용강(2)중에 랜스(4)를 침착시켜 아르곤(Ar) 및 질소(N2)가스를 가스취입구(5)를 통해 불어넣는 스트레이트 타입인 제2도 a와 T자형 리버스 타입인 제2도 b가 있다.The gas blowing method up to now is a top bubbling method, as shown in FIG. 1, by depositing the lance 4 in the molten steel 2 in the ladle 11 to form argon (Ar) and nitrogen (N 2 ). There are a second type a, a straight type in which gas is blown through the gas inlet 5, and a second type b, a T-shaped reverse type.
이들은 일반적으로 철골조로된 랜스 파이프(7)에 앵커(8)와 캐스터블(9)로 구성되어 있다.They are generally composed of an anchor 8 and a castable 9 in a steel frame lance pipe 7.
그러나 이런 종래의 랜스는 가스토출구(10)가 노즐(Nozzle)타입으로만 되어있어 취입 가스의 압력이 낮을 경우에는 노즐로 용강이 침입하여 노즐 막힘으로 인해 랜스의 폐각 요인이 되고 있으며, 취입가스의 유량조절이 불가능하다.However, in the conventional lance, the gaseous outlet 10 has only a nozzle type, and when the pressure of the blown gas is low, molten steel invades the nozzle, which causes clogging of the lance due to clogging of the nozzle. Flow control is not possible.
또한 취입가스의 압력을 크게하여 버브링할 경우는 래들내의 용강이 스로핑 작용에 의해 슬러그(Slag) (3)층이 벗겨져 용강산화등이 일어난다.In addition, when the pressure of the blown gas is increased, the slag layer 3 is peeled off by the slapping action of the molten steel in the ladle, and molten steel oxidation occurs.
이런 문제점을 개선하기 위해 제1도 b와 같이 래들 바닥부위에 다공질 프로그(6)를 취부한 저부가스취입(Battom Bubbling)방식이 사용되고 있으나, 이는 래들바닥에 설치하여야 하기 때문에 별도 장치가 필요하며 수리, 교체등에 많은 노력과 복잡성이 있고 용강유출 위험 부담도 있다.In order to improve this problem, a bottom bubbling method in which the porous prog 6 is mounted on the bottom of the ladle is used as shown in FIG. 1 b. In addition, there is a lot of effort and complexity in replacement, and there is a risk of molten steel spill.
또한 사용중 지금(地金) 및 슬래그의 부착이 크며 이로인해 버브링이 불가능한 경우가 발생하는 등의 문제점이 있다.In addition, there is a problem in that the adhesion of the slag and slag during use is large, and thus, the bubbling is impossible.
본 고안은 이런 종래의 문제점을 해결코져 상부가스취입 장치의 가스 토출구 부위에 다공질인 프러그 벽돌을 취부하므로서 랜스를 통한 가스 취입시 다공질 프러그 벽돌을 통해 가스가 취입되기 때문에 가스의 기포경이 적고 분산이 잘되어 소량의 가스로도 충분한 교반효과를 얻을 수 있으며, 가스의 유량 조절 용이 및 용강침입에 따른 막힘현상등을 개선하기 위한 것이다.The present invention solves this conventional problem, since the gas is blown through the porous plug brick when the gas is blown through the lance by mounting the porous plug brick at the gas outlet portion of the upper gas blowing device. It is well to achieve a sufficient stirring effect even with a small amount of gas, and to improve the flow control of the gas and clogging phenomenon due to the infiltration of molten steel.
출원인은 실용신안등록출원 88-19166호로 본원고안과 동일 분류의 기술을 선출원한 바 있으나 이는 스트레이트 타입 랜스에 관한 것으로서 T자형 리버스 타입랜스와 대형용량의 래들에는 그 사용이 부적합하다.Applicant has filed an application of the same classification as the present application as Utility Model Registration Application No. 88-19166, but this is related to a straight type lance and is not suitable for use in T-shaped reverse type lances and ladles of large capacity.
이에 따라 본 고안은 T자형 리버스 타입랜스이고 대용량의 래들에 사용될 수 있는 상부가스취입 랜스를 제공하는데 목적이 있다.Accordingly, the present invention aims to provide an upper gas blowing lance that is a T-shaped reverse type lance and that can be used for a large ladle.
이하 본 고안의 기술을 상세히 설명한다.Hereinafter, the technology of the present invention will be described in detail.
본 고안은 철골조로된 랜스 파이프(7)에 앵커(8)와 캐스터블(9)을 구성시킨 가스토출구가 있는 가스취입랜스에 있어서 기공경(氣孔俓)이 0.4㎜ 이하인 좌, 우 양측의 다공질 프러그(Porous Plug)벽돌(11)에 모르타르(Motar) (14)를 도포하여 양측의 금속케이스(13) (Metal Case)에 삽입시키고 이에 T자형 철물로된 파이프가 달린 덮개(12)를 용접하고 금속케이스(13)에 앵커(8)를 설치하여 랜스 파이프(7)에 연결시켜서된 다공질 프러그 벽돌을 취부한 상부가스취입 랜스로된 구성이다.The present invention is a gas blowing lance having a gas outlet with the anchor 8 and the castable 9 formed in a steel frame lance pipe 7. Apply mortar (14) to the plug (Porous Plug) brick (11) and insert it into the metal case (Metal Case) on both sides, and weld the cover (12) with a pipe made of T-shaped iron. The upper case of the gas blowing lance in which the porous plug brick is installed by attaching the anchor 8 to the metal case 13 and connected to the lance pipe 7.
상기구성에서 다공질 프러그 벽돌에 금속 케이스(13)를 감지않은 부위도 가스의 유출 방지를 위해 모르타르(14)를 바르고 철골조로된 금속케이스 및 앵커 부위에는 수성페인트를 수회 도포해 건조시킨 다은 캐스터블(9)를 시공하며 팽창에 의한 크랙을 방지시킬 수 있다.In the above structure, the mortar 14 is coated on the porous plug brick to prevent gas leakage, and the metal case and the anchor portion of the steel frame are coated with water-based paint several times and dried. 9) It can prevent cracking by expansion.
다공질인 프러그 벽돌의 기공경은 취부가스 유량(N㎥/Hr)에 따라 다소 차이는 있겠으나 최대 기공경이 ㅇ.4㎜를 초과시는 취입가스에 따른 작은 입자 기포 발생이 활발치 않아 불순물의 부상 촉진이 원만치 않고 취입가스 압력이 낮을시 용강 침입으로 막힘 현상의 우려가 있다.The pore size of porous brick blocks may vary depending on the flow rate of the mounting gas (N㎥ / Hr), but when the maximum pore diameter exceeds ㅇ 4mm, small particle bubbles are not generated due to the blowing gas, which promotes the rise of impurities. If the pressure is low and the blown gas pressure is low, there is a fear of clogging due to intrusion of molten steel.
이상에서와 같이 본 고안의 기술은 랜스의 양측 가스토출구가 다공질 프러그 벽돌로 통기경이 작기 때문에 용강 침입으로 인한 막힘 현상이 없고 다공질 프러그를 통과한 가스의 기포입자가 작아 부상시 불순 개재물의 포집효과가 좋으며 가스의 유량조절이 가능하여 스포링 발생을 억제하므로서 대형 래들에서 청정강 생산에 유리한 고안임을 알 수 있다.As described above, the technology of the present invention has a gas perforation of the lance on both sides of the porous plug brick, so that there is no clogging due to the intrusion of molten steel, and the bubble particles of the gas passing through the porous plug are small, so that the trapping effect of impurity inclusions is injured when injured. It is good and it is possible to control the flow rate of the gas to suppress the occurrence of spores, it can be seen that the design is advantageous for the production of clean steel in large ladle.
이에 따른 시험결과는 [표 1] 및 [표 2]와 같다.The test results are as shown in [Table 1] and [Table 2].
[표 1]TABLE 1
랜스 사용실적 비교.Lance Performance Comparison.
[표 2]TABLE 2
T자형 리버스 타입 랜스 사용실적 비교Performance comparison of T-shaped reverse type lance
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890004768U KR910008051Y1 (en) | 1989-04-18 | 1989-04-18 | Upper gas blowing lance with porous plug brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890004768U KR910008051Y1 (en) | 1989-04-18 | 1989-04-18 | Upper gas blowing lance with porous plug brick |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900019070U KR900019070U (en) | 1990-11-08 |
| KR910008051Y1 true KR910008051Y1 (en) | 1991-10-12 |
Family
ID=19285260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890004768U Expired KR910008051Y1 (en) | 1989-04-18 | 1989-04-18 | Upper gas blowing lance with porous plug brick |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR910008051Y1 (en) |
-
1989
- 1989-04-18 KR KR2019890004768U patent/KR910008051Y1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR900019070U (en) | 1990-11-08 |
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|
| EXPY | Expiration of term | ||
| UC1801 | Expiration of term |