JP3459132B2 - Cleaning equipment for molten steel outflow tuyere - Google Patents

Cleaning equipment for molten steel outflow tuyere

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Publication number
JP3459132B2
JP3459132B2 JP06810295A JP6810295A JP3459132B2 JP 3459132 B2 JP3459132 B2 JP 3459132B2 JP 06810295 A JP06810295 A JP 06810295A JP 6810295 A JP6810295 A JP 6810295A JP 3459132 B2 JP3459132 B2 JP 3459132B2
Authority
JP
Japan
Prior art keywords
lance
molten steel
tuyere
oxygen
metal powder
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 - Fee Related
Application number
JP06810295A
Other languages
Japanese (ja)
Other versions
JPH08257740A (en
Inventor
眞治 萩原
啓太 古家後
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to JP06810295A priority Critical patent/JP3459132B2/en
Publication of JPH08257740A publication Critical patent/JPH08257740A/en
Application granted granted Critical
Publication of JP3459132B2 publication Critical patent/JP3459132B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、溶鋼流出羽口の洗
浄装置に関し、特に、ランス冷却し、金属パウダーを
酸素と共に供給することにより、ランスの溶損を防止す
るための新規な改良に関する。 【0002】 【従来の技術】従来、用いられていたこの種の溶鋼流出
羽口の洗浄装置としては、一般に図で示す構成が採用
されていた。すなわち、図において符号1で示される
ものはタンディッシュからなる溶融金属を収容する容器
(以下「炉」と記す)であり、この炉1の溶鋼流出羽口
2に付着し溶融金属等の付着物を溶融して洗浄するため
の洗浄装置10が採用されている。この洗浄装置10
は、ランス3を有するランス駆動台車4と、このランス
駆動台車4に設けられたテレビカメラ5とからなり、こ
のランス3内に酸素を供給するための酸素用流路(図示
せず)が設けられ、このランス駆動台車4は操作室11
内のオペレータ12によりランス駆動台車運転台6を用
いて駆動が制御されるように構成されていた。 【0003】 【発明が解決しようとする課題】従来の溶鋼流出羽口の
浄装置は、以上のように構成されていたため、次のよ
うな課題が存在していた。すなわち、酸素を供給して溶
鋼流出羽口を加熱し、付着物を溶融洗浄するため、清浄
中にランスの先端が熱源として燃焼し溶損して短くな
り、テレビカメラを用いて洗浄状況を観察しつつランス
の先端と羽口との距離を一定に保つことが極めて困難で
あった。また、この酸素を用いた洗浄作業を効率的に行
うには、ランスの先端(すなわち、酸素の吹出口)と羽
口との距離は10cm程度に保っていることが必要であ
るが、テレビカメラの観察のみでは、溶損していくラン
スの先端と羽口との距離を前述の10cm程度に常に保
つことは極めて困難であった。 【0004】本発明は、以上のような課題を解決するた
めになされたもので、特に、ランスを冷却し、代わりに
金属パウダーを酸素と共に供給することにより、ランス
の溶損を防止するようにした溶鋼流出羽口の洗浄装置を
提供することを目的とする。 【0005】 【課題を解決するための手段】本発明による溶鋼流出羽
口の洗浄装置は、溶融金属を収容する容器の溶鋼流出羽
口に対しランスを介して酸素を供給し、前記溶鋼流出羽
口を加熱して洗浄する溶鋼流出羽口の洗浄装置におい
て、前記ランス内に設けられ前記ランスを水冷により冷
却するための冷却水用流路と、前記ランス内に設けられ
前記酸素を供給するための酸素用流路と、前記ランス
設けられ金属パウダーを供給するための金属パウダー
用流路と、前記ランスの先端側に設けられた頭部と、前
記頭部の先端側に設けられた酸素用ノズルと、前記頭部
の外周に設けられ前記酸素用ノズルとは非同軸状に設け
られた金属パウダー用ノズルとを備え、前記酸素と共に
前記金属パウダーを前記ランスから前記溶鋼流出羽口側
に供給し、前記頭部及び金属パウダー用ノズルは前記水
冷により冷却するようにした構成である。 【0006】 【作用】本発明による溶鋼流出羽口の洗浄装置において
は、ランスを水を用いて冷却した状態下でランスの各ノ
ズルの出口開口を溶鋼流出羽口側に所定距離で接近(約
10cm)させ、酸素用流路及び酸素用ノズルから酸素
を供給すると共に、金属パウダー用流路及び金属パウダ
ー用ノズルから金属パウダーを供給(例えば、5〜15
kg/hr)すると、この金属パウダーが熱源となり、
溶鋼流出羽口の加熱を行って洗浄を行うことができると
共に、ノズルの溶損を防止できる。 【0007】 【実施例】以下、図面と共に本発明による溶鋼流出羽口
の洗浄装置の好適な実施例について説明する。なお、従
来例と同一又は同等部分については同一符号を付して説
明する。なお、図と同じ構成を用いるが図とは異な
る構成のみを図1及びとして示している。すなわ
ち、図1において符号3で示されるものはランスであ
り、このランス3の先端側には、水冷領域20が形成さ
れ、この水冷領域20の先端側には頭部21及び酸素用
ノズル22が形成され、この頭部21の外周には後述の
金属パウダー23を噴射供給するための金属パウダー用
ノズル24が前記ノズル22とは非同軸状配置の別体状
として設けられている。 【0008】前記ランス3内には、各々管状をなす冷却
水用流路30、酸素用流路31及び金属パウダー用流路
32が内設されており、この冷却水用流路30は前記ラ
ンス3の水冷ジャケット状に形成された水冷領域20に
接続され、水源40からの水33を循環供給することに
よってこの水冷領域20を介して金属パウダー用ノズル
24及び頭部21は溶損が発生することないような温
度となるように冷却されている。酸素ボンベ41から前
記酸素用流路31に供給される酸素34は前記酸素用ノ
ズル22から噴射供給され、金属パウダー給粉器42か
ら前記金属パウダー用流路32に供給された金属パウダ
ー23は前記金属パウダー用ノズル24から噴射供給さ
れるように各々連通して構成されている。 【0009】前記金属パウダー23は、熱源となるた
め、燃焼しやすい材料が好適であるが、製鉄所で発生す
る鉄含有量の多いスラジ、ダスト類で、例えば転炉集塵
ダストとふるい分けした粒径0.15mm以下のものを
用いてよい。本実施例では、一般に溶接棒用として用い
られている第1表に示す化学成分のものを援用した。ま
た、その吐出量としては5〜15Kg/Hr程度好適に
は10Kg/Hrでそれ以下であれば洗浄性が低下し、
これ以上であれば羽口を構成する耐火物をめる。 【0010】 【表1】【0011】次に、実験例について説明する。まず、図
に示すようにランス3を保持してテレビカメラ5でオ
ペレータ12がモニターしつつ水冷による冷却状態下の
ランス3の各ノズル22、24を溶融金属を収容する容
器としての炉1(この場合、タンディッシュ)の溶鋼流
出羽口2に接近(約10cm)させ、酸素用ノズル22
から酸素34を噴射供給すると共に金属パウダー用ノズ
ル24から金属パウダー23を噴射供給すると、酸素3
4と金属パウダー23が燃焼して溶鋼流出羽口2に付着
している残留物が溶融して洗浄される。なお、洗浄時に
おいてもランス3の各ノズル22、24の温度は低く保
持されているため、従来のような溶損を発生することが
なく、溶鋼流出羽口2と各ノズル22、24間の距離を
所定(約10cm)の距離に容易に維持することができ
る。 【0012】次に、本出願人が実際に行った実験例につ
いてその1例を示すと次の通りである。 (実験例) (1)洗浄タンディッシュ条件 受鋼鋼種 B5EX9連 使用回数 126ch (2)洗浄条件 金属パウダー吐出量・・・10kg/hr・・金属パウダー用流路が細く、搬 送距離が長かったため、これ以上 、もしくはこれ以下の吐出量だと 、不整脈流となってしまった。 O 圧力 ・・・≒5kg/cm ランス冷却水 ・・・流量5m/hr、温度入側17℃−出側22℃ (テスト時) (3)洗浄状況 パウダー火付き状況:良好 地金洗浄状況 :洗浄は通常の手吹き時と同様に行なえた。 (4)洗浄後耐火物観察状況 洗浄後の耐火物には、特に異常は見られなかった。 なお、この洗浄作業は、タンディッシュに限ることなく
羽口を有する種々の炉等に適用できる。 【0013】 【発明の効果】本発明による溶鋼流出羽口の洗浄装
は、以上のように構成されているため、次のような効果
を得ることができる。すなわち、ランスの先端部の酸素
用ノズル及び金属パウダー用ノズルを水冷により冷却
し、熱源としては金属パウダーを用いているため、ノズ
ルの溶損を防止し、ノズルと溶鋼流出羽口との距離を一
定に保つことが容易となり、羽口の酸素洗浄作業の機械
化及び遠隔操作化が容易となるため、3Kと云われる作
業の大幅な作業改善ができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for washing molten steel outflow tuyeres.
It relates KiyoshiSo location, in particular, to cool the lance, by supplying the metal powder with an oxygen, a novel improvement for preventing the erosion of the lance. [0002] Conventionally, as a washing KiyoshiSo location of the molten steel outflow tuyere of this that has been used species, generally shown in Figure 3 configuration has been adopted. That is, what is indicated by reference numeral 1 in FIG. 3 is a container (hereinafter, referred to as a "furnace") for accommodating a molten metal made of a tundish. A cleaning device 10 for melting and cleaning a kimono is employed. This cleaning device 10
Comprises a lance drive truck 4 having a lance 3 and a television camera 5 provided on the lance drive truck 4, and an oxygen flow path (not shown) for supplying oxygen into the lance 3 is provided. The lance drive truck 4 is mounted on the operation room 11.
The driving is controlled using the lance driving cab 6 by an operator 12 inside the lance. [0003] [INVENTION Problems to be Solved <br/> wash KiyoshiSo location of a conventional molten steel outflow tuyere, because it was configured as described above, the following problems were present. That is, to supply oxygen to heat the molten steel outflow tuyere and to melt and wash off the deposits, the tip of the lance burns as a heat source during cleaning and melts and becomes shorter, and the cleaning condition is observed using a TV camera. However, it was extremely difficult to keep the distance between the tip of the lance and the tuyere constant. In order to efficiently perform the cleaning operation using oxygen, the distance between the tip of the lance (that is, the oxygen outlet) and the tuyere needs to be maintained at about 10 cm. It was extremely difficult to always keep the distance between the tip of the lance and the tuyere at the above-mentioned level of about 10 cm by observation only. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In particular, the present invention is designed to prevent the lance from being damaged by cooling the lance and supplying metal powder together with oxygen instead. an object of the present invention is to provide a washing KiyoshiSo location of molten steel outflow tuyere was. [0005] A cleaning apparatus for a molten steel outflow tuyere according to the present invention supplies oxygen to a molten steel outflow tuyere of a vessel containing a molten metal through a lance, and supplies the molten steel outflow tuyere. in the cleaning apparatus of the molten steel outflow tuyere to clean by heating the mouth, the cooling water flow path for cooling <br/> retirement by water cooling the lance disposed in the lance, provided within said lance the oxygen and oxygen flow path for supplying, in said lance
A metal powder flow path for supplying the metal powder provided in a head provided on the tip side of the lance, before
An oxygen nozzle provided on the tip side of the head, and the head
Provided on the outer periphery of the nozzle and provided non-coaxially with the oxygen nozzle
A metal powder nozzle provided with the metal powder, the metal powder is supplied from the lance to the molten steel outflow tuyere side together with the oxygen, and the head and the metal powder nozzle are provided with the water.
The configuration is such that cooling is performed by cooling . [0006] In washing KiyoshiSo location of the molten steel outflow tuyere according DETAILED DESCRIPTION OF THE INVENTION The present invention, approach the outlet openings of the nozzles of the lance under a state in which cooling using a lance water molten steel outflow tuyere side at a predetermined distance (About 10 cm) to supply oxygen from the oxygen flow path and the oxygen nozzle, and supply metal powder from the metal powder flow path and the metal powder nozzle (for example, 5 to 15 cm).
kg / hr), this metal powder becomes a heat source,
The molten steel outflow tuyere can be heated and cleaned, and the nozzle can be prevented from being melted. [0007] [Embodiment] Hereinafter, a preferred embodiment of the washing KiyoshiSo location of the molten steel outflow tuyere according to the present invention will be described with reference to the accompanying drawings. The same or equivalent parts as in the conventional example will be described with the same reference numerals. Although using the same configuration as FIG. 3 shows only the configuration different from that of FIG. 3 as FIGS. That is, in FIG. 1, what is indicated by reference numeral 3 is a lance, and a water cooling region 20 is formed at the distal end side of the lance 3, and a head 21 and an oxygen nozzle 22 are provided at the distal end side of the water cooling region 20. A metal powder nozzle 24 for jetting and supplying a metal powder 23 to be described later is provided on the outer periphery of the head 21 as a separate body non-coaxially arranged with the nozzle 22. A cooling water flow path 30, an oxygen flow path 31, and a metal powder flow path 32, each having a tubular shape, are provided inside the lance 3. is connected to the third cooling water jacket formed in the shape the water-cooled region 20, the water 33 through the water-cooled region 20 by circulating and supplying metallic powder nozzle 24 and the head 21 from the water source 40 is melting damage occurred It is cooled down to a temperature that will not cause it to. The oxygen 34 supplied from the oxygen cylinder 41 to the oxygen flow channel 31 is injected and supplied from the oxygen nozzle 22, and the metal powder 23 supplied from the metal powder feeder 42 to the metal powder flow channel 32 is They are configured to communicate with each other so as to be jetted and supplied from the metal powder nozzle 24. Since the metal powder 23 is a heat source, it is preferable to use a material which is easy to burn. Those having a diameter of 0.15 mm or less may be used. In this example, those having the chemical components shown in Table 1 which are generally used for welding rods were used. Further, the discharge amount is about 5 to 15 kg / hr, preferably 10 kg / hr, and if it is less than 10 kg / hr, the cleaning property is reduced.
Refractory wounds Mel to configure if tuyeres any more. [Table 1] Next, an experimental example will be described. First, figure
As shown in FIG. 3 , while the lance 3 is held and the operator 12 monitors the television camera 5, the nozzles 22 and 24 of the lance 3 in a cooling state by water cooling are used as a furnace 1 as a container for storing molten metal (in this case, (Tundish) close to the molten steel outflow tuyere 2 (about 10 cm).
When the metal powder 23 is injected and supplied from the metal powder nozzle 24 while the oxygen 34 is injected and supplied from the
4 and the metal powder 23 burn, and the residue adhering to the molten steel outflow tuyere 2 is melted and washed. Since the temperatures of the nozzles 22 and 24 of the lance 3 are kept low even during the cleaning, there is no occurrence of melting damage as in the prior art. The distance can be easily maintained at a predetermined (about 10 cm) distance. Next, an example of an experimental example actually performed by the present applicant is as follows. (Experimental example) (1) Cleaning tundish conditions Steel receiving steel type B5EX 9 stations Number of times used 126 ch (2) Cleaning conditions Metal powder discharge rate: 10 kg / hr. If the discharge amount was more or less than this, an arrhythmic flow occurred. O 2 pressure ··· 5 kg / cm 2 Lance cooling water · Flow rate 5 m 2 / hr, temperature inlet 17 ° C-outlet 22 ° C (at the time of test) (3) Cleaning status Powder ignition status: good Washing condition: Washing was carried out in the same manner as in normal hand blowing. (4) Observation of refractories after cleaning No particular abnormality was found in the refractories after cleaning. This washing operation can be applied not only to a tundish but also to various furnaces having tuyere. [0013] wash KiyoshiSo location of the molten steel outflow tuyere according to the invention according to the present invention, because they are constructed as described above, it is possible to obtain the following effects. That is, the nozzle for oxygen and the nozzle for metal powder at the tip of the lance are cooled by water cooling, and since metal powder is used as a heat source, erosion of the nozzle is prevented, and the distance between the nozzle and the molten steel outflow tuyere is reduced. It is easy to keep the temperature constant, and the mechanization and remote control of the oxygen cleaning work of the tuyere become easy, so that the work called 3K can be greatly improved.

【図面の簡単な説明】 【図1】本発明による溶鋼流出羽口の洗浄装置を示す構
成図である。 【図2】図1の要部を示す拡大構成図である。 【図3】従来の溶鋼流出羽口の洗浄装置を示す構成図で
ある。 【符号の説明】 1 炉(溶融金属を収容する容器) 2 溶鋼流出羽口 3 ランス 22 酸素用ノズル 24 金属パウダー用ノズル 30 冷却水用流路 31 酸素用流路 32 金属パウダー用流路 33 水 34 酸素 50 出口開口
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a cleaning device for a molten steel outflow tuyere according to the present invention. FIG. 2 is an enlarged configuration diagram showing a main part of FIG. FIG. 3 is a configuration diagram showing a conventional apparatus for cleaning molten steel outflow tuyeres. [Description of Signs] 1 Furnace (container for containing molten metal) 2 Molten steel outflow tuyere 3 Lance 22 Oxygen nozzle 24 Metal powder nozzle 30 Cooling water channel 31 Oxygen channel 32 Metal powder channel 33 Water 34 oxygen 50 outlet opening

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平3−94968(JP,A) 特開 平4−354814(JP,A) 特開 平6−182529(JP,A) 特開 平5−177342(JP,A) (58)調査した分野(Int.Cl.7,DB名) B22D 43/00 B22D 11/10 310 C21C 5/46 102 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-94968 (JP, A) JP-A-4-354814 (JP, A) JP-A-6-182529 (JP, A) JP-A-5-182529 177342 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B22D 43/00 B22D 11/10 310 C21C 5/46 102

Claims (1)

(57)【特許請求の範囲】 【請求項1】 溶融金属を収容する容器(1)の溶鋼流出
羽口(2)に対しランス(3)を介して酸素(34)を供給し、前
記溶鋼流出羽口(2)を加熱して洗浄する溶鋼流出羽口の
洗浄装置において、前記ランス(3)内に設けられ前記ラ
ンス(3)を水冷により冷却するための冷却水用流路(30)
と、前記ランス(3)内に設けられ前記酸素(34)を供給す
るための酸素用流路(31)と、前記ランス(3)内に設けら
れ金属パウダー(23)を供給するための金属パウダー用流
路(32)と、前記ランス(3)の先端側に設けられた頭部(2
1)と、前記頭部(21)の先端側に設けられた酸素用ノズル
(22)と、前記頭部(21)の外周に設けられ前記酸素用ノズ
ル(22)とは非同軸状に設けられた金属パウダー用ノズル
(24)とを備え、前記酸素(34)と共に前記金属パウダー(2
3)を前記ランス(3)から前記溶鋼流出羽口(2)側に供給
し、前記頭部(21)及び金属パウダー用ノズル(24)は前記
水冷により冷却するように構成したことを特徴とする溶
鋼流出羽口の洗浄装置。
Claims: 1. An oxygen (34) is supplied to a molten steel outflow tuyere (2) of a container (1) containing a molten metal through a lance (3), and the molten steel is supplied to the molten steel. outlet tuyeres in the cleaning apparatus of the molten steel outflow tuyere to clean by heating (2), the cooling water flow path (30) for the lance is provided with (3) cooled by water cooling the lance (3) in
When the metal for supplying the oxygen flow path for supplying the oxygen (34) provided on the lance (3) in (31), a metal powder provided in the lance (3) in the (23) A powder channel (32) and a head (2) provided on the tip side of the lance (3).
1) and an oxygen nozzle provided on the tip side of the head (21)
(22) and the oxygen nozzle provided on the outer periphery of the head (21).
(22) is a non-coaxial nozzle for metal powder
(24), and the metal powder (2) together with the oxygen (34).
3) is supplied from the lance (3) to the molten steel outflow tuyere (2) side
The head (21) and the metal powder nozzle (24) are
A cleaning device for a molten steel outflow tuyere characterized by being configured to be cooled by water cooling .
JP06810295A 1995-03-27 1995-03-27 Cleaning equipment for molten steel outflow tuyere Expired - Fee Related JP3459132B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06810295A JP3459132B2 (en) 1995-03-27 1995-03-27 Cleaning equipment for molten steel outflow tuyere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06810295A JP3459132B2 (en) 1995-03-27 1995-03-27 Cleaning equipment for molten steel outflow tuyere

Publications (2)

Publication Number Publication Date
JPH08257740A JPH08257740A (en) 1996-10-08
JP3459132B2 true JP3459132B2 (en) 2003-10-20

Family

ID=13364051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP06810295A Expired - Fee Related JP3459132B2 (en) 1995-03-27 1995-03-27 Cleaning equipment for molten steel outflow tuyere

Country Status (1)

Country Link
JP (1) JP3459132B2 (en)

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Publication number Publication date
JPH08257740A (en) 1996-10-08

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