JPS626608B2 - - Google Patents
Info
- Publication number
- JPS626608B2 JPS626608B2 JP19804982A JP19804982A JPS626608B2 JP S626608 B2 JPS626608 B2 JP S626608B2 JP 19804982 A JP19804982 A JP 19804982A JP 19804982 A JP19804982 A JP 19804982A JP S626608 B2 JPS626608 B2 JP S626608B2
- Authority
- JP
- Japan
- Prior art keywords
- flux
- oxygen gas
- lance
- pipe
- inert gas
- 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
- 230000004907 flux Effects 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 27
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 25
- 229910001882 dioxygen Inorganic materials 0.000 claims description 25
- 238000007654 immersion Methods 0.000 claims description 23
- 239000011261 inert gas Substances 0.000 claims description 14
- 239000012476 oxidizable substance Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 230000032258 transport Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical group [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 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
Description
【発明の詳細な説明】
本発明は溶融金属処理用浸漬ランスに係り、特
に脱燐、脱硫等の反応効率のすぐれた浸漬ランス
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an immersion lance for processing molten metal, and particularly to an immersion lance with excellent reaction efficiency for dephosphorization, desulfurization, etc.
溶銑中の燐成分の除去方法として製鋼炉への装
入鍋あるいは混銑炉車を反応容器とし生石灰一鉄
鉱石（あるいはスケール）を主成分とするフラツ
クスの吹込みによる脱燐反応が実施されている。
脱燐反応の機構は次の化学反応式で示される。 As a method for removing phosphorus from hot metal, a dephosphorization reaction is carried out by using a charging pot of a steelmaking furnace or a mixer car as a reaction vessel and injecting a flux whose main component is quicklime iron ore (or scale). .
The mechanism of the dephosphorization reaction is shown by the following chemical reaction formula.
Fe＋１／２O2→FeO ……(1)
3CaO＋nFeO→3CaO・nFeO ……(2)
2P＋3CaO・nFeO→3CaO
・P2O5＋nFe ……(3)
すなわち、鉱石は銑中で分解し酸素源となり、
(1)，(2)式によりカルシウムフエライト3CaO・
nFeOを生成し、その後銑中のＰがFeと置換して
脱燐反応が進行する。Fe+1/2O 2 →FeO ...(1) 3CaO+nFeO→3CaO・nFeO ...(2) 2P+3CaO・nFeO→3CaO ・P 2 O 5 +nFe ...(3) In other words, the ore decomposes in the pig iron and becomes an oxygen source,
Calcium ferrite 3CaO・
After nFeO is generated, P in the pig iron is replaced with Fe, and the dephosphorization reaction progresses.
脱燐フラツクスの搬送、吹込みには従来不活性
ガスが使用されてきた。これは酸素ガスを使用す
ると、フラツクス中のCaO、鉱石、スケール等に
は通常0.5〜1.0％程度の炭素が混入しており、こ
れらの被酸化性物質が反応し燃焼、爆発等の災害
を起す危険があるためである。 Conventionally, inert gas has been used to transport and blow dephosphorization flux. This is because when oxygen gas is used, CaO, ore, scale, etc. in the flux usually contain about 0.5 to 1.0% carbon, and these oxidizable substances react and cause disasters such as combustion and explosions. This is because it is dangerous.
しかし、不活性ガスとフラツクスのみを使用し
た場合はある程度の脱燐率は期待できるが、反応
効率が低く、低燐銑を得るには多量のフラツクス
を要することになり熱的および経済的に不利であ
る。このため酸素源として鉱石、スケールの代り
に酸素ガスを使用して鉱石、スケールの分解時に
おける温度降下を減少して脱燐効率を向上させる
ことが考えられた。 However, when only inert gas and flux are used, a certain degree of dephosphorization rate can be expected, but the reaction efficiency is low and a large amount of flux is required to obtain low-phosphorus pig iron, which is disadvantageous thermally and economically. It is. For this reason, it has been considered to improve the dephosphorization efficiency by using oxygen gas instead of ore and scale as an oxygen source to reduce the temperature drop during decomposition of ore and scale.
フラツクスと酸素ガスを溶銑に吹込む従来の方
法として酸素ガスを一本のランスからスラグ湯面
に吹付け、他方のランスから不活性ガスとともに
フラツクスを吹込む方法、あるいは一本のランス
で同時に吹込む方法等がある。一本のランスで吹
込む装置を第１図により説明する。フラツクス収
容タンク２からのフラツクスは不活性ガス配管４
にて搬送され、酸素ガス配管６からの酸素ととも
にランス昇降装置７に保持された浸漬ランス８に
よつて溶銑処理容器１０内の溶銑１２に吹込まれ
る。 Conventional methods for injecting flux and oxygen gas into hot metal include injecting oxygen gas onto the slag surface from one lance and injecting flux together with an inert gas from the other lance, or simultaneously using one lance to inject oxygen gas onto the slag surface. There are ways to enter. A device for blowing with a single lance will be explained with reference to FIG. The flux from the flux storage tank 2 is transferred to the inert gas pipe 4.
The immersion lance 8 held in the lance lifting device 7 along with oxygen from the oxygen gas pipe 6 blows into the hot metal 12 in the hot metal processing vessel 10 .
従来の浸漬ランス８は第２図に示す如き２重管
構造で外管１４からは酸素ガス、内管１６からは
フラツクスを搬送した不活性ガスが溶銑１２の中
に別々に吹込まれていた。しかしこの２重管構造
の浸漬ランス８あるいは酸素ガスとフラツクスと
の２本のランスを使用する方法では、酸素ガスと
フラツクスが十分に混合していないため上記(3)式
に示されるカルシユムフエライトの生成に吹込ま
れた酸素ガスが十分に寄与しない欠点があつた。 The conventional immersion lance 8 has a double tube structure as shown in FIG. 2, and oxygen gas is blown into the hot metal 12 from the outer tube 14, and inert gas carrying flux is blown from the inner tube 16 into the hot metal 12. However, in the method of using this double-pipe structure immersion lance 8 or two lances of oxygen gas and flux, the oxygen gas and flux are not mixed sufficiently, so calcium ferrite as shown in equation (3) above is produced. The disadvantage was that the oxygen gas blown into the system did not contribute sufficiently to the production of the gas.
また酸素ガスとフラツクスを搬送した不活性ガ
スを浸漬ランス内で単純に混合することも考えら
れるが、これは浸漬ランスが閉塞した場合にフラ
ツクス中の被酸化性物質あるいは配管中のスケー
ルが酸素ガス配管中に逆流して爆発する危険性が
あり実施できない。 Another possibility is to simply mix the oxygen gas and the inert gas that carried the flux in the immersion lance, but this would prevent oxidizable substances in the flux or scale in the piping from becoming oxygen gas if the immersion lance becomes clogged. This cannot be carried out due to the risk of explosion due to backflow into the piping.
本発明の目的は、上記従来技術の間題点を解決
し、反応効率のすぐれた溶融金属処理用浸漬ラン
スを提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art described above and to provide an immersion lance for processing molten metal with excellent reaction efficiency.
本発明の要旨とするところは次のとおりであ
る。すなわち、酸素ガスと被酸化性物質を含むフ
ラツクスを搬送する不活性ガスとを同時に吹込む
溶融金属処理用浸漬ランスにおいて、前記酸素ガ
ス配管に接続する外管と前記被配化性物質を含む
フラツクスを搬送する不活性ガス配管に接続し管
壁の一部が多孔質焼結金属から成る内管との２重
管構造の混合部と、前記内管の延長部に設けられ
溶融金属中に浸漬される吹込み部と、を有して成
ることを特徴とする溶融金属処理用浸漬ランスで
ある。 The gist of the present invention is as follows. That is, in an immersion lance for molten metal processing in which oxygen gas and an inert gas carrying a flux containing an oxidizable substance are simultaneously blown into the lance, an outer pipe connected to the oxygen gas pipe and the flux containing the oxidizable substance are connected. A mixing section has a double pipe structure with an inner tube that is connected to an inert gas pipe that conveys the gas, and a portion of the tube wall is made of porous sintered metal, and a mixing section that is provided at an extension of the inner tube and is immersed in the molten metal. An immersion lance for processing molten metal, characterized in that it has a blowing section in which the immersion lance is used.
本発明の詳細を実施例とその図面により説明す
る。第３図は本発明実施例の浸漬ランスの断面図
である。浸漬ランスは酸素ガス配管６にフランジ
で接続する外管１８とフラツクスを搬送する不活
性ガス配管４とフランジで接続する内管２０との
２重管構造の混合部２２を有し、内管２０の管壁
の一部は孔径５μ以下の多孔質焼結金属２４で構
成されている。内管２０の延長部には外周に耐火
物ライニング２６を施工した吹込み部２８が構成
されている。 The details of the present invention will be explained with reference to examples and drawings thereof. FIG. 3 is a sectional view of the immersion lance according to the embodiment of the present invention. The immersion lance has a mixing part 22 with a double pipe structure including an outer pipe 18 connected to the oxygen gas pipe 6 by a flange, an inert gas pipe 4 for conveying flux, and an inner pipe 20 connected by a flange. A part of the tube wall is made of porous sintered metal 24 with a pore diameter of 5 μm or less. A blowing section 28 is formed in the extension of the inner tube 20 and has a refractory lining 26 on its outer periphery.
上記の構成を有する本発明の浸漬ランスは多孔
質焼結金属２４を通して酸素ガスが内管２０にお
いてフラツクスを含む不活性ガスと混合され吹込
み部２８の先端から溶銑中に吹込まれるので酸素
ガスが有効に作用し反応効率がすぐれている。ま
た浸漬ランスが詰つたりあるいは搬送ガスと酸素
ガスの圧力変動が発生した場合にもフラツクス中
の被酸化性物質が酸素ガス配管６側に逆流するこ
とはなく安全である。 In the immersion lance of the present invention having the above configuration, oxygen gas is mixed with an inert gas containing flux in the inner tube 20 through the porous sintered metal 24 and is blown into the hot metal from the tip of the blowing part 28, so that the oxygen gas acts effectively and the reaction efficiency is excellent. Furthermore, even if the immersion lance becomes clogged or pressure fluctuations occur between the carrier gas and the oxygen gas, the oxidizable substances in the flux will not flow back into the oxygen gas pipe 6, making it safe.
Ｃ：4.2％、Si：0.19％、Ｐ：0.120％、Ｓ：
0.050％の組成を有する溶銑を脱燐処理した実施
例について説明する。使用したフラツクスは
CaO：31％、鉱石：59％、ほたる石：10％の組成
であり、処理時間は25分であつた。本発明の浸漬
ランスを使用した本発明例と従来の第２図で示し
た酸素ガスとフラツクスをそれぞれ別に吹込む２
重管構造の浸漬ランスを使用した比較例につい
て、燐含有量と吹込みフラツクス原単位との関係
を第４図に示した。第４図から明らかな如く、本
発明例は比較例に比して反応効率がすぐれてい
る。 C: 4.2%, Si: 0.19%, P: 0.120%, S:
An example in which hot metal having a composition of 0.050% was dephosphorized will be described. The flux used was
The composition was CaO: 31%, ore: 59%, and fluorite: 10%, and the processing time was 25 minutes. In the example of the present invention using the immersion lance of the present invention and the conventional example shown in Fig. 2, oxygen gas and flux are blown separately.
FIG. 4 shows the relationship between the phosphorus content and the unit of blown flux for a comparative example using an immersion lance with a double pipe structure. As is clear from FIG. 4, the reaction efficiency of the inventive example is superior to that of the comparative example.
本発明は上記実施例からも明らかな如く、被酸
化性物質を含有するフラツクスと酸素ガスを多孔
質焼結金属を介して浸漬ランス内にて完全に混合
することによつて吹込みによる溶融金属の処理反
応を効率的にかつ安全に実施できた。 As is clear from the above embodiments, the present invention is capable of producing molten metal by blowing, by completely mixing a flux containing an oxidizable substance and oxygen gas in an immersion lance through a porous sintered metal. The treatment reactions could be carried out efficiently and safely.
なお本発明を溶銑の脱燐について主として説明
したが、本発明の浸漬ノズルは溶鋼その他の溶融
金属に対して、被酸化性物質を含むフラツクスに
酸素ガスを富化して吹込み処理する場合に広く適
用できる。 Although the present invention has been mainly described with respect to dephosphorization of hot metal, the immersion nozzle of the present invention can be widely used for blowing molten steel and other molten metals by enriching oxygen gas into a flux containing oxidizable substances. Applicable.
第１図は溶銑に対するフラツクスの搬送、吹込
みを示す系統図、第２図は従来の２重管浸漬ラン
スを示す断面図、第３図は本発明の浸漬ランスを
示す断面図、第４図は本発明ランスと従来のラン
スを使用した実施例における溶銑のＰ含有量とフ
ラツクス原単位との関係を比較する相関図であ
る。
４……フラツクスを搬送する不活性ガス配管、
６……酸素ガス配管、１８……外管、２０……内
管、２２……混合部、２４……多孔質焼結金属、
２６……耐火物ライニング、２８……吹込み部。
Fig. 1 is a system diagram showing the conveyance and injection of flux into hot metal, Fig. 2 is a sectional view showing a conventional double pipe immersion lance, Fig. 3 is a sectional view showing the immersion lance of the present invention, and Fig. 4. 1 is a correlation diagram comparing the relationship between the P content of hot metal and the flux basic unit in Examples using the lance of the present invention and the conventional lance. 4...Inert gas piping for transporting flux,
6...Oxygen gas piping, 18...Outer pipe, 20...Inner pipe, 22...Mixing part, 24...Porous sintered metal,
26... Refractory lining, 28... Blowing section.
Claims (1)
搬送する不活性ガスとを同時に吹込む溶融金属処
理用浸漬ランスにおいて、前記酸素ガス配管に接
続する外管と前記被酸化性物質を含むフラツクス
を搬送する不活性ガス配管に接続し管壁の一部が
多孔質焼結金属から成る内管との２重管構造の混
合部と、前記内管の延長部に設けられ溶融金属中
に浸漬される吹込み部と、を有して成ることを特
徴とする溶融金属処理用浸漬ランス。1. In an immersion lance for molten metal processing that simultaneously blows oxygen gas and an inert gas that transports a flux containing an oxidizable substance, an outer pipe connected to the oxygen gas pipe and an inert gas that transports the flux containing an oxidizable substance are transported. A mixing part with a double pipe structure, which is connected to an inert gas piping and has an inner pipe whose wall is partially made of porous sintered metal, and an extension part of the inner pipe, which is immersed in the molten metal. An immersion lance for processing molten metal, comprising a blowing section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19804982A JPS5989710A (en) | 1982-11-11 | 1982-11-11 | Immersion lance for treatment of molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19804982A JPS5989710A (en) | 1982-11-11 | 1982-11-11 | Immersion lance for treatment of molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5989710A JPS5989710A (en) | 1984-05-24 |
| JPS626608B2 true JPS626608B2 (en) | 1987-02-12 |
Family
ID=16384677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19804982A Granted JPS5989710A (en) | 1982-11-11 | 1982-11-11 | Immersion lance for treatment of molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5989710A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG45386A1 (en) * | 1989-09-29 | 1998-01-16 | Ausmelt Ltd | Top submerged injection with a shrouded lance |
| CN101305105B (en) * | 2005-11-09 | 2010-09-08 | 杰富意钢铁株式会社 | Method of hot metal dephosphorization treatment |
| CN101906512B (en) * | 2010-08-19 | 2012-07-25 | 中冶赛迪工程技术股份有限公司 | Spray gun for desulfuration of single-spray particle magnesium molten iron |
-
1982
- 1982-11-11 JP JP19804982A patent/JPS5989710A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5989710A (en) | 1984-05-24 |
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