JPH08218110A - Method for melting metal stuck to molten metal vessel - Google Patents
Method for melting metal stuck to molten metal vesselInfo
- Publication number
- JPH08218110A JPH08218110A JP2529595A JP2529595A JPH08218110A JP H08218110 A JPH08218110 A JP H08218110A JP 2529595 A JP2529595 A JP 2529595A JP 2529595 A JP2529595 A JP 2529595A JP H08218110 A JPH08218110 A JP H08218110A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- fusing
- slag
- melting
- 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.)
- Granted
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明方法は、溶融金属容器の付
着地金溶断方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for melting a bare metal of a molten metal container.
【０００２】[0002]
【従来の技術】例えば、鋼精錬炉の転炉炉口、溶銑を運
搬する混銑車の炉口溶銑、溶鋼等を受け入れる取鍋等の
内壁のような溶融金属容器には地金が付着する。このよ
うな付着地金を溶断除去するには、酸素パイプ（ジェッ
トランス）を人手により地金付着部へ位置せしめ、酸素
ガスを吹付けて溶断することが知られている。また、吹
錬ランスを炉口の地金付着部へ位置して酸素ガスを放射
状に吹付け炉口周囲の地金を溶断除去することが特公昭
４７−１３７２１号公報に開示されている。2. Description of the Related Art For example, metal is adhered to a molten metal container such as a converter furnace port of a steel refining furnace, a hot metal port of a hot metal truck for carrying hot metal, an inner wall of a ladle for receiving molten steel and the like. In order to melt and remove such adhered metal, it is known to manually position an oxygen pipe (jet lance) to the metal adhered portion and blow oxygen gas to melt the metal. Further, Japanese Patent Publication No. 47-13721 discloses that a blowing lance is located at a metal adhesion portion of a furnace opening to blow oxygen gas radially to melt and remove the metal around the furnace opening.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ごとき付着地金には滓が混在しており、地金は酸素ガス
により容易に溶断することはできるが滓は溶断が困難で
あり、特に、塊状で大きな滓においては溶断が著しく困
難になる。従って、付着地金の溶断効率が低下し、溶融
金属容器の稼動停止が長時間に及ぶことになり、稼動率
が低下する。また、炉壁付近の地金の溶断では微妙な溶
断能力を調整しないと炉壁を破損する要因になる等の課
題がある。本発明方法はこのような課題を有利に解決す
るためなされたものであり、付着地金の溶断に際し、地
金溶断時の溶断煙と滓溶断時の溶断煙の輝度（色調）変
化にもとづき、溶断条件を変更することにより迅速かつ
確実に付着地金を溶断することを提供することを目的と
するものである。However, since the slag is mixed in the adherent metal as described above, the slag can be easily melted by oxygen gas, but the slag is difficult to melt. Melting is extremely difficult in massive slag. Therefore, the fusing efficiency of the deposited metal is reduced, the operation of the molten metal container is stopped for a long time, and the operating rate is reduced. In addition, there is a problem that the melting of the metal in the vicinity of the furnace wall may cause damage to the furnace wall unless the delicate fusing capacity is adjusted. The method of the present invention has been made in order to advantageously solve such a problem, in the fusing of the adherent metal, based on the brightness (color tone) change of the fusing smoke at the time of the metal fusing and the fusing smoke at the slag fusing, It is an object of the present invention to provide quick and reliable fusing of adhered metal by changing fusing conditions.
【０００４】[0004]
【課題を解決するための手段】前記のような課題を解決
した本発明の溶断金属容器の付着地金溶断方法は、地金
と滓が混在する付着地金を酸素ガスの吹付けにより溶断
するに際し、地金溶断と滓溶断の溶断煙の輝度（色調）
変化を検知し、地金溶断は酸素ガスの吹付けにより溶断
し、滓溶断は酸素ガス及び予熱ガスの吹付けにより溶断
することを特徴とするものである。According to the method of fusing adherent metal of a fusing metal container of the present invention, which solves the above-mentioned problems, the adherent metal mixed with the metal and the slag is melted by blowing oxygen gas. Brightness (color tone) of fusing smoke due to fusing of metal and fusing of slag
Detecting a change, the melting of the metal is blown by blowing oxygen gas, and the melting of the slag is blown by blowing oxygen gas and preheating gas.
【０００５】[0005]
【作用】このような溶断金属容器の付着地金溶断方法
は、溶断時の地金溶断と滓溶断の溶断煙の輝度を検知し
て、これに基づき地金溶断時には酸素ガスを溶断ガスと
して吹付け、また、塊状滓の溶断に際しては酸素ガスと
ともに予熱ガスと加熱剤を混入したものを溶断ガスとし
て吹付けて迅速かつ確実に溶断することができる。即
ち、予熱ガスにより塊状滓の温度を高めるとともに加熱
剤により滓を一層高温にして酸素ガスにより容易に溶断
するものである。[Function] Such a method for fusing adherent metal of a fusing metal container detects the brightness of fusing smoke during fusing and slag fusing, and based on this, blows oxygen gas as fusing gas during fusing of the fouling. In addition, when fusing the slag mass, a mixture of a preheating gas and a heating agent together with oxygen gas can be sprayed as a fusing gas for quick and reliable fusing. That is, the temperature of the massive slag is raised by the preheating gas, and the slag is further heated by the heating agent to be easily fused by the oxygen gas.
【０００６】溶断時の地金溶断と塊状滓溶断の溶断煙の
輝度（色調）を検知するには、前記のごとき炉口等に付
着した地金を酸素ガスにより溶断すると、地金溶断時は
赤茶色傾向の溶断煙が発生し、滓の溶断時においては白
色傾向の溶断煙が発生して溶断煙の輝度（色調）が変化
することが明らかになったことから、地金溶断時と滓溶
断時の溶断煙の輝度変化を迅速且つ確実に検知し、その
結果をもとに地金と滓が混在する付着地金を溶断して除
去するものである。なお、前記したような溶断煙の輝度
変化は、目視で判断できるものと目視判断できないもの
があり、目視判断が困難な場合は輝度変化検知カメラ等
で輝度の変化を判断するものである。[0006] In order to detect the brightness (color tone) of fusing smoke due to fusing of molten metal and fusing of massive slag at the time of fusing, the fouling of the metal adhering to the furnace mouth or the like as described above is fusing with oxygen gas. It was revealed that fusing smoke with a reddish-brown tendency was generated, and that the brightness (color tone) of the fusing smoke changed when fusing the slag, which caused a change in the brightness (color tone) of the fusing metal. The brightness change of the fusing smoke at the time of fusing is detected quickly and surely, and based on the result, the adhered metal in which the metal and the slag are mixed is melted and removed. It should be noted that the above-described change in the brightness of the fusible smoke can be visually judged and cannot be visually judged. When the visual judgment is difficult, the brightness change detection camera or the like judges the change in the brightness.
【０００７】このような作用を有利に満足する予熱ガス
としては、例えばＬＰＧ（プロパンガス）、酸素ガスに
窒素ガスを若干添加した混合ガス等を用いることができ
る。また、加熱剤としては、例えばFe、Al、Ca、Si、Si
O2及びこれらの混合物を粉体状又はワイヤー状にしたも
のを用いることにより、これらの燃焼によって滓が高温
になり、容易に溶断することができる。As the preheated gas that advantageously satisfies such an action, for example, LPG (propane gas), a mixed gas in which nitrogen gas is slightly added to oxygen gas, or the like can be used. Further, as the heating agent, for example, Fe, Al, Ca, Si, Si
By using O 2 and a mixture thereof in the form of powder or wire, the slag can be heated to a high temperature due to the combustion thereof, and can be easily fused.
【０００８】地金と混在している滓の形態が塊状である
場合は、上記のごとく滓溶断時に溶断ガスとして酸素ガ
スとともに、予熱ガスと加熱剤を吹付けることにより滓
を確実に溶断することができるが、例えば、滓が粒状で
混在している場合は溶断ガスとして酸素ガスとともに予
熱ガスを吹付けることによって、酸素ガス単独吹付に比
べ迅速に溶断することができる。しかし、鋼精錬炉であ
る転炉、混銑車、溶銑、溶鋼の取鍋に付着する地金であ
れば、上記のごとく酸素ガスまたは酸素ガス、予熱ガス
及び加熱剤の吹付けを使い分けることによって地金を迅
速かつ確実に溶断することができる。また、付着地金が
低温の場合は、溶断部により遠方を予熱（保熱）しつつ
溶断部を溶断することによって溶断時に溶断部がより高
温になっており、一層容易に付着地金を溶断することが
できる。When the form of the slag mixed with the metal is lumpy, the slag is surely melted by spraying the preheating gas and the heating agent together with the oxygen gas as the melting gas at the time of melting the slag as described above. However, for example, when the slag is mixed in the form of particles, the preheating gas is blown together with the oxygen gas as the fusing gas, so that the fusing can be performed more quickly than the single blowing of the oxygen gas. However, in the case of metal that adheres to converters such as steel smelting furnaces, hot metal carts, hot metal, and ladle of molten steel, it is possible to selectively spray oxygen gas or oxygen gas, preheating gas and heating agent as described above. The gold can be melted quickly and reliably. In addition, when the adhesion metal is at a low temperature, the melting part is preheated (heat-retained) at a distance and the melting part is melted. can do.
【０００９】このような本発明方法の一例を図面により
説明する。図１に示すごとく吹錬中に転炉１の炉口２の
内側に付着した地金３に溶断ガスバーナー５を指向し、
溶断ガスを地金３に吹付けて地金３を溶断し、一方、輝
度（色調）変化検知カメラ４で溶断煙を検知（目視判断
が可能な場合は、目視で判断してもよい）して、この検
知結果に基づき、図２に示すごとく地金３を溶断すると
きは、溶断ガスバーナー５から酸素ガス６を吹付けて地
金３を溶断する。このようにして地金３を溶断し、図３
に示すごとく地金３に混在する滓７の溶断により輝度が
変化し、その検知によって酸素ガス６とともに予熱ガス
８と加熱剤９を吹付けつつ、地金３を溶断するものであ
る。An example of such a method of the present invention will be described with reference to the drawings. As shown in FIG. 1, the blowing gas burner 5 is directed toward the metal 3 adhered to the inside of the furnace opening 2 of the converter 1 during blowing,
The melting gas is blown onto the metal 3 to melt it, while the brightness (color tone) change detection camera 4 detects melting smoke (if visual judgment is possible, it may be visually judged). Then, based on this detection result, when melting the base metal 3 as shown in FIG. 2, oxygen gas 6 is blown from the fusing gas burner 5 to melt the base metal 3. In this way, the metal 3 is melted and
As shown in (1), the brightness changes due to the melting of the slag 7 mixed in the base metal 3, and the detection thereof detects that the base metal 3 is melted while spraying the preheating gas 8 and the heating agent 9 together with the oxygen gas 6.
【００１０】次に、溶断ガスバーナーの一例を挙げる。
図４において、溶断ガスバーナー５の先端中心部に切断
酸素ガス噴射孔１０を形成し、この切断酸素ガス噴射孔
１０の周囲に予熱ガス噴射孔１１、更に該予熱ガス噴射
孔１１の周囲に予熱酸素ガス噴射溝１２をそれぞれ形成
して、溶断ガス噴射管１３を配設する。この溶断ガス噴
射管１３の外側には加熱剤噴射管１４と、地金の溶断部
遠方を保熱（予熱）する保熱ガス（予熱ガスと同類ガス
を使用）噴射管１５を図示のごとく配設する。Next, an example of the fusing gas burner will be given.
In FIG. 4, a cutting oxygen gas injection hole 10 is formed in the center of the tip of the fusing gas burner 5, a preheating gas injection hole 11 is provided around the cutting oxygen gas injection hole 10, and further preheating is provided around the preheating gas injection hole 11. The oxygen gas injection groove 12 is formed, and the fusing gas injection pipe 13 is arranged. A heating agent injection pipe 14 and a heat-retaining gas (using a preheating gas and a similar gas) 15 for heat-retaining (preheating) the distant melting portion of the metal are arranged outside the fusing gas injection pipe 13 as illustrated. Set up.
【００１１】上記のごとき溶断ガスバーナー５により地
金溶断時には、切断酸素ガス噴射孔１０からの酸素ガス
を吹付けて溶断する。また、粒状の滓が混在する地金の
溶断時には、予熱ガス噴射孔１１から予熱ガスを吹付け
るとともに、予熱酸素ガス噴射溝１２から酸素ガスを吹
付け、予熱ガスを燃料とし溶断部を予熱しつつ溶断す
る。更に塊状の滓が混在する地金の溶断時には、上記の
ごとき粒状滓を混在する地金の溶断時の予熱ガスの吹付
けに加え、加熱剤噴射管１４から溶断部へ加熱剤を吹付
け、一層溶断部を高温にして溶断するものである。When the base metal is melted by the melting gas burner 5 as described above, oxygen gas from the cutting oxygen gas injection hole 10 is blown to melt the metal. Further, at the time of melting of the metal in which granular slag is mixed, preheating gas is sprayed from the preheating gas injection hole 11 and oxygen gas is sprayed from the preheating oxygen gas injection groove 12 to preheat the fusing part using the preheating gas as fuel. While melting. Further, at the time of melting of the ingot with a mixture of lumps of slag, in addition to spraying the preheating gas at the time of melting of the ingot with the mixture of granular slag as described above, a heating agent is sprayed from the heating agent injection pipe 14 to the fusing part, The fusing portion is further heated to a higher temperature for fusing.
【００１２】しかして、地金に粒状または塊状に滓が混
在しており、溶断が進行して地金、粒状滓、塊状滓を繰
り返し溶断することになり、前記のごとく溶断煙の輝度
（色調）変化を検知してこの結果に基づき上記のごとき
溶断ガスバーナー５による予熱ガス、加熱剤等の吹付
け、吹付停止を繰り返しつつ地金を溶断するものであ
る。However, since the ingots are mixed with the slag in a granular or lump form, the fusing progresses, and the ingot, the granular slag, and the slag are repeatedly fused. ) A change is detected, and based on this result, the base metal is melted by repeating the spraying of the preheating gas, the heating agent, etc. by the above-mentioned melting gas burner 5 and the stopping of the spraying.
【００１３】[0013]
【実施例】次に、本発明方法の実施例を比較例とともに
挙げる。EXAMPLES Next, examples of the method of the present invention will be given together with comparative examples.
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【表３】 注１：鋼精錬炉（酸素上吹転炉）において、精錬中に炉口に付着した 地金を採取（除去）し、上表のごとく溶断試験を行なった。 注２：地金の距離はそれぞれのトータル溶断距離である。 注３：加熱剤は、粉末状鉄分: 1.0 kg/分、Al 70 ％、SiO2 30％混合粉 末: 1.5 kg/ 分を供給した。 注４：予熱ガス及び保熱ガスはＬＰＧを使用、保熱は溶断部の先方 300 〜1500mmを加熱（800 ℃) した。 注５：バーナー先端と地金距離は300 mm間隔で溶断した。[Table 3] Note 1: In a steel refining furnace (oxygen top blowing converter), the metal that adhered to the furnace mouth during refining was sampled (removed) and a fusing test was conducted as shown in the table above. Note 2: The distance of metal is the total fusing distance of each. Note 3: As the heating agent, powdered iron content: 1.0 kg / min, Al 70%, SiO 2 30% mixed powder: 1.5 kg / min were supplied. Note 4: LPG was used as the preheating gas and the heat retaining gas, and the heat retaining was performed by heating 300 to 1500 mm ahead of the fusing part (800 ° C). Note 5: The burner tip and the ingot were melted at 300 mm intervals.
【００１６】[0016]
【発明の効果】本発明は前記説明から明らかなように、
地金と滓が混在する付着地金を酸素ガスの吹付けにより
溶断するに際し、地金溶断と滓溶断の溶断煙の輝度（色
調）変化を検知し、地金溶断は酸素ガスの吹付けにより
溶断し、滓溶断は酸素ガス及び予熱ガスの吹付けにより
溶断し、滓が塊状滓であるときはこれに加熱剤を加えて
溶断することにより、地金の溶断除去が迅速かつ確実に
でき、作業能率を向上するとともに、精錬炉等の稼動停
止を短縮して生産性を高めることができ、また、溶断ガ
スの効率を高め、溶断コストを軽減することができる等
の優れた効果を奏するものである。As is apparent from the above description, the present invention is as follows.
When melting the adherent metal that is a mixture of metal and slag by blowing oxygen gas, changes in the brightness (color tone) of the melted smoke caused by metal melting and slag melting are detected, and metal melting is caused by the blowing of oxygen gas. Fusing, slag fusing is blown by blowing oxygen gas and preheating gas, and when the slag is a lump slag, by adding a heating agent to this and melting it, the fusing removal of the ingot can be done quickly and surely, It has excellent effects such as improving work efficiency, shortening operation stop of refining furnace, etc. to improve productivity, improving efficiency of fusing gas and reducing fusing cost. Is.
【図１】本発明方法の一例を示すフロー図である。FIG. 1 is a flow chart showing an example of a method of the present invention.
【図２】本発明方法の一例を示すフロー図である。FIG. 2 is a flow chart showing an example of the method of the present invention.
【図３】本発明方法の一例を示すフロー図である。FIG. 3 is a flow chart showing an example of the method of the present invention.
【図４】溶断バーナーの斜視図である。FIG. 4 is a perspective view of a fusing burner.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴浦 正美 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所内 (72)発明者 野又 宏之 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masami Suzuura 5-3 Tokai-cho, Tokai-shi, Aichi Pref.Nippon Steel Works Ltd. (72) Inventor Hiroyuki Nomata 5-Tokai-cho, Tokai-shi, Aichi 3 Inside Nippon Steel Works, Nippon Steel Co., Ltd.
Claims (2)
の吹付けにより溶断するに際し、地金溶断と滓溶断の溶
断煙の輝度変化を検知し、地金溶断は酸素ガスの吹付け
により溶断し、滓溶断は酸素ガス及び予熱ガスの吹付け
により溶断することを特徴とする溶断金属容器の付着地
金溶断方法。1. When melting an adherent metal containing a mixture of metal and slag by blowing oxygen gas, a change in the brightness of the melting smoke caused by the melting of the metal and the melting of the slag is detected, and the melting of the metal is blown with oxygen gas. A method for fusing a base metal of a fusing metal container, characterized in that the fusing is performed by fusing and the slag is fusing by blowing an oxygen gas and a preheating gas.
ガスに加え加熱剤の吹付けにより溶断することを特徴と
する請求項１に記載の溶融金属容器の付着地金溶断方
法。2. The method for fusing the adherent metal of a molten metal container according to claim 1, wherein when the slag is a massive slag, the slag is melted by spraying a heating agent in addition to the oxygen gas and the preheating gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02529595A JP3282774B2 (en) | 1995-02-14 | 1995-02-14 | Fusing method for adhered metal on molten metal container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02529595A JP3282774B2 (en) | 1995-02-14 | 1995-02-14 | Fusing method for adhered metal on molten metal container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08218110A true JPH08218110A (en) | 1996-08-27 |
| JP3282774B2 JP3282774B2 (en) | 2002-05-20 |
Family
ID=12162037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02529595A Expired - Lifetime JP3282774B2 (en) | 1995-02-14 | 1995-02-14 | Fusing method for adhered metal on molten metal container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3282774B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019082307A (en) * | 2017-11-01 | 2019-05-30 | 日鉄住金テクノロジー株式会社 | Deposit removing device and deposit removing method of molten metal container |
-
1995
- 1995-02-14 JP JP02529595A patent/JP3282774B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019082307A (en) * | 2017-11-01 | 2019-05-30 | 日鉄住金テクノロジー株式会社 | Deposit removing device and deposit removing method of molten metal container |
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| JP3282774B2 (en) | 2002-05-20 |
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