JPH01214A - powder projection lance - Google Patents
powder projection lanceInfo
- Publication number
- JPH01214A JPH01214A JP62-154432A JP15443287A JPH01214A JP H01214 A JPH01214 A JP H01214A JP 15443287 A JP15443287 A JP 15443287A JP H01214 A JPH01214 A JP H01214A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- lance
- water
- powder projection
- projection lance
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims description 57
- 239000000463 material Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 description 25
- 229910052751 metal Inorganic materials 0.000 description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高炉鋳床での溶銑の予備処理を行うに際して、
粉体を溶銑中に投射するために使用する粉体投射ランス
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for pre-treating hot metal in a blast furnace casthouse.
This invention relates to a powder projection lance used to project powder into hot metal.
高炉鋳床での溶銑の予備処理を行うに際して、溶銑中に
酸化剤（ミルスケール又は鉄鉱石等）と造滓剤（蛍石、
生石灰等）を添加する粉体投射方法が知られている。こ
の方法は、熔ｉ樋を流れる溶銑表面に、空気、気酸、又
は窒素ガスに粉体を混合した混合ガスとして、前記混合
ガスを加圧して投射する方法である。この方法によると
、混合ガスの運動エネルギーを利用して粉体を溶銑中に
吹き込み溶銑と粉体の接触面積を大きくすることにより
、脱珪・脱燐の反応をおこなっていた。When pre-treating hot metal in a blast furnace castbed, oxidizing agents (mill scale or iron ore, etc.) and slag-forming agents (fluorite, iron ore, etc.) are added to the hot metal.
A powder projection method is known in which powder is added (e.g., quicklime). This method is a method in which a mixed gas of air, acid, or nitrogen gas mixed with powder is projected under pressure onto the surface of hot metal flowing through a molten metal trough. According to this method, the kinetic energy of the mixed gas is used to blow powder into hot metal to increase the contact area between the hot metal and the powder, thereby performing desiliconization and dephosphorization reactions.
第４図は、従来使用されている粉体投射ランスの断面図
である。この図によれば、溶鉄樋３内の溶銑４を処理す
るための処理槽５を覆っている処理槽用カバー２と、処
理槽用カバー２の上方に粉体投射ランスを昇降する昇降
装置ｆ６と、昇降装置６に固定された粉体投射ランス８
を支持する支持部材７と、鋼製のパイプ８の外面に耐火
物１４を被覆した粉体投射ランス８とから構成される装
置である。このような装置で溶銑の予備処理を行うと、
溶銑の脱珪・脱燐の促進、溶銑成分の安定化、及び次工
程（製鋼炉）の生産能率及び歩留向上など優れた効果を
示している。FIG. 4 is a sectional view of a conventionally used powder projection lance. According to this figure, there is a treatment tank cover 2 that covers a treatment tank 5 for treating hot metal 4 in a molten iron gutter 3, and a lifting device f6 that lifts and lowers a powder projection lance above the treatment tank cover 2. and a powder projection lance 8 fixed to the lifting device 6.
This device is composed of a support member 7 that supports the powder, and a powder projection lance 8 made of a steel pipe 8 whose outer surface is coated with a refractory 14. When pre-processing hot metal with such equipment,
It has shown excellent effects such as promoting desiliconization and dephosphorization of hot metal, stabilizing hot metal components, and improving production efficiency and yield in the next process (steelmaking furnace).
［発明が解決しようとする問題点］
しかしながら、従来の粉体投射ランスは長時間使用する
と、溶銑顕熱及び溶銑中への粉体投射中のスプラッシュ
により、粉体投射ランスの先端が溶損する。さらに、ラ
ンス先端と溶銑表面の距離が大きくなるので反応効率が
悪化する。従って常に、ランス先端と溶銑表面の距離を
一定に維持することが重要である。この装置で溶銑の予
備処理を行うと、
■粉体投射ランスが溶損して短くなる
（１／２の長さ）と、粉体投射ランスを取り替える必要
があるので、その間溶銑の予備処理ができないため、こ
の装置の稼動率が低下する。[Problems to be Solved by the Invention] However, when the conventional powder projection lance is used for a long time, the tip of the powder projection lance is melted and damaged due to the sensible heat of the hot metal and the splash during the powder projection into the hot metal. Furthermore, since the distance between the lance tip and the hot metal surface increases, the reaction efficiency deteriorates. Therefore, it is important to always maintain a constant distance between the lance tip and the hot metal surface. When pre-processing hot metal with this equipment, if the powder projection lance becomes shortened (1/2 length) due to melting, it is necessary to replace the powder projection lance, so pre-processing of hot metal cannot be performed during that time. Therefore, the operating rate of this device decreases.
■昇降装置が高温雰囲気の近くにあるので、昇降装置の
故障率が高い。■Since the lifting device is located near a high temperature atmosphere, the failure rate of the lifting device is high.
■粉体投射ランスの１本当りの耐用回数が低い。■The service life of each powder projection lance is low.
■高温雰囲気内で使用するので、粉体投射ランスの曲が
り、変形がある。■Since it is used in a high temperature atmosphere, the powder projection lance may be bent or deformed.
■ランスが短くなると、反応効率が低下する。■When the lance becomes shorter, the reaction efficiency decreases.
などの問題点があうた。Problems such as these were identified.
この発明は係かる事情に鑑みてなされたものであって、
粉体投射ランス装置の稼動率が高く、昇降装置の故障率
が低（、粉体投射ランスの１本当りの耐用回数が高く、
粉体投射ランスの曲がり、変形が少なく、高レベルの反
応効率を安定して得る装置をものを提供することを目的
とする。This invention was made in view of the circumstances, and
The operating rate of the powder projection lance device is high, the failure rate of the lifting device is low (and the service life of each powder projection lance is high,
It is an object of the present invention to provide a device that stably obtains a high level of reaction efficiency with less bending and deformation of a powder projection lance.
この発明に係わる粉体投射ランスは、先端を耐熱、耐摩
耗性材料でコーティングした水冷式の外筒と、前記外筒
の内側に交換可能に配置された耐摩耗性材料からなる粉
体投射用内筒を具備したことを特徴とする。The powder projection lance according to the present invention includes a water-cooled outer cylinder whose tip is coated with a heat-resistant and wear-resistant material, and a wear-resistant material arranged inside the outer cylinder so as to be replaceable. It is characterized by having an inner cylinder.
この発明によれば外筒ランスの先端に耐熱、耐摩耗性材
料でコーティングすることによりランスの先端の損耗が
著しく減少し、水冷式の外筒にすることにより、ランス
の摩耗、変形、曲がりが防止され、更に水冷式であるの
で消耗スピードが遅い、更にこの外筒の内側に交換容易
な耐摩耗性材料（例、えばステンレス）を使用している
ので、内内筒の耐用回数が多い、さらに内湾と粉体供給
装置の接続を簡単な方式にするニーとによって交換時間
が著しく短縮された。According to this invention, by coating the tip of the lance with a heat-resistant and wear-resistant material, wear and tear on the tip of the lance is significantly reduced, and by using a water-cooled outer tube, wear, deformation, and bending of the lance are reduced. Furthermore, since it is a water-cooled type, the wear rate is slow, and since a wear-resistant material (such as stainless steel) that is easy to replace is used on the inside of this outer cylinder, the inner cylinder has a long service life. Furthermore, the changeover time was significantly shortened by the knee which simplified the connection between the inner bay and the powder supply device.
以下添付された第１図、第２図、第３図を参照してこの
発明を説明する。The present invention will be explained below with reference to the attached FIGS. 1, 2, and 3.
第１図は、粉体投射ランス装置の概要図である。FIG. 1 is a schematic diagram of a powder projection lance device.
第２図は溶銑の予備処理に使われる水冷式粉体投射ラン
スｌの断面図である。第３図は水冷式粉体投射ランスｌ
の先端部の拡大図である。冷却水は、給水ヘッダー２１
より、給水パルプ２２、緊急遮断弁２３、給水流量計２
４を通り、水冷式粉体投射ランスｌの給水口２５より粉
体投射ランス１に入り、管内を通って排水口２６より出
て、排水流量計２７を経由して集中ピット２８に排水さ
れる。FIG. 2 is a sectional view of a water-cooled powder projection lance l used for pretreatment of hot metal. Figure 3 shows a water-cooled powder projection lance.
It is an enlarged view of the tip part of. Cooling water is supplied from the water supply header 21
From, water supply pulp 22, emergency shutoff valve 23, water supply flow meter 2
4, enters the powder projection lance 1 from the water supply port 25 of the water-cooled powder projection lance l, passes through the pipe, exits from the drainage port 26, and is drained to the concentration pit 28 via the drainage flow meter 27. .
水冷式粉体投射ランス１は処理槽５ を覆うカバー２の
上に立設された固定台枠１９に設置された取りつけ部材
２０で保持されている。固定台枠１９に固定された水冷
式粉体投射ランスｌの外筒ｌＯは銅製の三重管で外管１
Ｌ中管１２、内管１３から構成され、水冷式粉体投射ラ
ンス１の先端は耐熱、耐摩耗性材料１５（例えばＮｉ−
Ｃｒ系等）を３閣から６閣の厚にコーティングされてい
る。The water-cooled powder projection lance 1 is held by a mounting member 20 installed on a fixed frame 19 erected on a cover 2 covering a processing tank 5 . The outer cylinder lO of the water-cooled powder projection lance l fixed to the fixed frame 19 is a triple pipe made of copper.
The tip of the water-cooled powder projection lance 1 is made of a heat-resistant and wear-resistant material 15 (for example, Ni-
It is coated with 3 to 6 coats of Cr-based metal, etc.).
内筒１４は耐摩耗性材料（例えばステンレス等）より構
成され、三重管１０内に挿入される。水冷 −式粉体投
射ランスｌの上部は、粉体供給管１６と、内筒１４と、
銅製の外筒１′４の各々のフランジ−部１７はポル）１
８等で固定されている。The inner cylinder 14 is made of a wear-resistant material (for example, stainless steel, etc.), and is inserted into the triple pipe 10. The upper part of the water-cooled powder projection lance l includes a powder supply pipe 16, an inner cylinder 14,
Each flange portion 17 of the copper outer cylinder 1'4 is
It is fixed at 8 mag.
次に、この実施例の動作について説明する。Next, the operation of this embodiment will be explained.
粉体投射ランス１を冷却するために、給水ヘソグー、よ
り給水バルブ２２を開にして３０Ｔ／Ｈの給水を供給す
る。この時水冷式粉体投射ランスｌのランス先端の流速
は３．５ｍ／秒以上となる。次ぎに、緊急遮断弁２３、
給水流量計２４を経由して水冷式粉体投射ランスｌの給
水口２５より入り、粉体投射ランス１を冷却後排水口２
６、排水流量計２７を経由して集中ピット２８に排水さ
れる。In order to cool the powder projection lance 1, the water supply valve 22 is opened to supply 30 T/H of water. At this time, the flow velocity at the tip of the water-cooled powder projection lance 1 is 3.5 m/sec or more. Next, the emergency shutoff valve 23,
The water enters the water supply port 25 of the water-cooled powder projection lance l via the water supply flow meter 24, and after cooling the powder projection lance 1, the water enters the water drain port 2.
6. Drainage is conducted to the concentration pit 28 via the drainage flow meter 27.
一方水冷式粉体投射ランス１は処理槽５を覆うカバー２
の上に立設された固定台枠１９に設置された取りつけ部
材２０で保持されており、空気、気酸、又は窒素ガスに
粉体を混合した混合ガスとし、前記混合ガスを加圧して
投射する粉体供給管１６を経由して粉体投射ランス１の
先端から溶鉄樋３ を流れる溶銑表面に投射される。水
冷式粉体投射ランス１の先端と溶銑の表面は所定の距離
（例えば約１００ｍ５ ）に保持されている。この範囲
が反応効率が最適であることが実験結果から確認されて
いる。On the other hand, the water-cooled powder projection lance 1 has a cover 2 that covers the processing tank 5.
It is held by a mounting member 20 installed on a fixed frame 19 erected above, and a mixed gas of air, acid, or nitrogen gas mixed with powder is used, and the mixed gas is pressurized and projected. The powder is projected from the tip of the powder projection lance 1 onto the surface of the hot metal flowing through the molten iron trough 3 via the powder supply pipe 16. The tip of the water-cooled powder projection lance 1 and the surface of the hot metal are maintained at a predetermined distance (for example, about 100 m5). It has been confirmed from experimental results that the reaction efficiency is optimal within this range.
水冷式粉体投射ランス１の先端は耐熱、耐摩耗性材料で
コーティングされ、水冷されているので水冷効果により
ランスにスプラッシュが付着しにくく、摩耗、変形、曲
がり等の発生はほどんとない。The tip of the water-cooled powder projection lance 1 is coated with a heat-resistant and wear-resistant material and is water-cooled, so the water-cooling effect makes it difficult for splash to adhere to the lance, and there is little chance of wear, deformation, bending, etc.
なお、水冷式粉体投射ランスｌの使用時において、処理
槽５に水漏れ等が発生すると、水蒸気爆発を起こし、設
備破壊、人身災害等の危険があるので給水流量計２４と
排水流量計２７の実測値を制御装置２９に入力し、両方
の実測値の差が３％以上になると制御装置２９から緊２
．遮断弁２３を閉にして、更に粉体吹き込み装置の混合
ガスの供給を停止し、水冷式粉体投射ランス１装置を系
外に移動することもできる。When using the water-cooled powder projection lance l, if a water leak occurs in the processing tank 5, a steam explosion may occur, resulting in equipment destruction and personal injury. The actual measured value of is input to the control device 29, and when the difference between the two actual measured values becomes 3% or more, the control device 29 sends an emergency message.
．． It is also possible to close the shutoff valve 23, stop the supply of mixed gas from the powder blowing device, and move the water-cooled powder projection lance 1 device out of the system.
表１に上記実施例で行った場合の本発明法と従来法との
比較を示す。表１から明らかなように稼動率、故障時間
、耐用回数、ランスの変形等が著しく改善されている。Table 1 shows a comparison between the method of the present invention and the conventional method when carried out in the above example. As is clear from Table 1, the operating rate, failure time, service life, deformation of the lance, etc. are significantly improved.
〔発明の効果］
この発明によれば、先端を耐熱、耐摩耗性材料でコーテ
ィングした水冷式の外筒と、前記外筒の内側に交換可能
に配置された耐摩耗性材料からなる粉体投射用内筒を具
備しているので、故障時間の短縮、耐用回数のアップ、
ランスの変形と、消耗の減少にによる、稼働率アップ、
反応効率のアップ等が図れて、溶銑の予備処理量の増大
が可能である。[Effects of the Invention] According to the present invention, a powder jetting system includes a water-cooled outer cylinder whose tip is coated with a heat-resistant and wear-resistant material, and a wear-resistant material that is replaceably arranged inside the outer cylinder. Equipped with an internal cylinder, it reduces failure time, increases the number of service life,
Increased operating rate due to lance deformation and reduced wear and tear.
It is possible to improve the reaction efficiency and increase the amount of pre-treatment of hot metal.
第１図はこの実施例に係わる粉体投射ランス装置の概要
図、第２図は溶銑の予備処理に使われる水冷式粉体投射
ランスの断面図、第３図は水冷式粉体投射ランスの先端
部の拡大図、第４図は、従来使用されている粉体投射ラ
ンスの断面図である。
１−・・水冷式粉体ランス、 ４−溶銑。
５−・−カバー、 １０・−外筒。
１１・−外管、 １２−中管。
１３−・内管、 １４・−・内筒。
特許出願人 日本鋼管株式會社第２図Figure 1 is a schematic diagram of the powder projection lance device according to this embodiment, Figure 2 is a sectional view of a water-cooled powder projection lance used for preliminary treatment of hot metal, and Figure 3 is a diagram of the water-cooled powder projection lance. The enlarged view of the tip, FIG. 4, is a sectional view of a conventionally used powder projection lance. 1-...Water-cooled powder lance, 4-Hot metal. 5--cover, 10--outer cylinder. 11.-outer tube, 12-middle tube. 13--Inner tube, 14--Inner tube. Patent applicant Nippon Kokan Co., Ltd. Figure 2
Claims (1)
外筒と、前記外筒の内側に交換可能に配置された耐摩耗
性材料からなる粉体投射用内筒を具備したことを特徴と
する粉体投射ランス。It is characterized by comprising a water-cooled outer cylinder whose tip is coated with a heat-resistant and wear-resistant material, and an inner cylinder for powder projection made of a wear-resistant material that is replaceably arranged inside the outer cylinder. Powder projection lance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-154432A JPH01214A (en) | 1987-06-23 | powder projection lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-154432A JPH01214A (en) | 1987-06-23 | powder projection lance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS64214A JPS64214A (en) | 1989-01-05 |
| JPH01214A true JPH01214A (en) | 1989-01-05 |
Family
ID=
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