JPH0842979A - Converter for refining non-ferrous metal - Google Patents
Converter for refining non-ferrous metalInfo
- Publication number
- JPH0842979A JPH0842979A JP6178285A JP17828594A JPH0842979A JP H0842979 A JPH0842979 A JP H0842979A JP 6178285 A JP6178285 A JP 6178285A JP 17828594 A JP17828594 A JP 17828594A JP H0842979 A JPH0842979 A JP H0842979A
- Authority
- JP
- Japan
- Prior art keywords
- tuyere
- pipe
- converter
- inner diameter
- pipes
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はマット負荷の変化に応じ
た羽口送風速度で送風し得る非鉄金属製錬用転炉に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a converter for smelting non-ferrous metals which can blow air at a tuyere blowing speed according to changes in mat load.
【0002】[0002]
【従来の技術】銅製錬において、マットから粗銅に転換
する工程に転炉が一般に用いられ、代表的なものは横置
円筒式の所謂P.S.型転炉である。この型の転炉は円
筒状の胴部と円筒両端部の鏡板とを鋼板で形成し、胴部
の側方に数十本の羽口を水平に配置し、胴部上方中央部
に装入口を設け、内面を煉瓦でライニングした構造とな
っている。2. Description of the Related Art In copper smelting, a converter is generally used in the step of converting matte to blister copper, and a typical one is a horizontal cylinder type so-called P.P. S. It is a type converter. In this type of converter, the cylindrical body and the end plates of both ends of the cylinder are made of steel plates, dozens of tuyere are arranged horizontally on the side of the body, and the charging port is installed in the upper center of the body. Is provided and the inner surface is lined with bricks.
【0003】この転炉にマット熔体と硅石を投入し、空
気を羽口から送風すればマット中の硫化鉄分が酸化して
酸化鉄となり、これが硅石と反応してスラグ化する。こ
のスラグは硫化銅より比重が小さく、熔体表面に浮くの
で、転炉を傾転して装入口から排出し、残った硫化銅分
に更に空気を吹き込んで粗銅に仕上げる。When the matte melt and silica are put into this converter and air is blown from the tuyere, the iron sulfide content in the mat is oxidized to form iron oxide, which reacts with silica to form slag. Since this slag has a smaller specific gravity than copper sulfide and floats on the surface of the molten metal, the converter is tilted and discharged from the charging port, and the remaining copper sulfide is further blown with air to finish it into blister copper.
【0004】このような転炉の操業において、炉内の熔
体は羽口からの送風により強力に撹拌されつつ酸化され
るが、この熔体の流動により鋼製羽口パイプは先端から
溶損して行き、操業回数が増す毎に羽口煉瓦部も次第に
溶損して口径が広がる。In the operation of such a converter, the molten metal in the furnace is oxidized while being strongly stirred by the air blown from the tuyere, but the flow of this molten metal causes the steel tuyere pipe to be melted and damaged from the tip. As the number of operations increases, the tuyere brick part gradually melts and the diameter increases.
【0005】羽口煉瓦口径の拡大は煉瓦の厚さの減少を
意味し、羽口煉瓦の残存厚さが一定限度を超えると転炉
外皮に加わる温度が高くなり過ぎて危険なため炉の寿命
と判断し、その炉は休止して放冷後、溶損羽口煉瓦と羽
口パイプを取り外し、新品の羽口パイプを取付け、新品
の羽口煉瓦を積み直して再度使用に供する。An increase in the diameter of the tuyere brick means a decrease in the thickness of the brick, and if the remaining thickness of the tuyere brick exceeds a certain limit, the temperature applied to the outer shell of the converter becomes too high, which is dangerous and the life of the furnace is increased. Therefore, the furnace is stopped and allowed to cool, then the melted tuyere brick and tuyere pipe are removed, a new tuyere pipe is attached, and a new tuyere brick is reloaded for reuse.
【0006】転炉の寿命は一概に言えないが、一般には
操業回数で150回程度とされているが、煉瓦の材質、
羽口部煉瓦の形状、操業方法等の改善で現在では寿命は
220〜230回程度まで延長されている。Although the life of the converter cannot be generally stated, it is generally said that the number of operations is about 150 times.
Due to improvements in the shape of tuyere bricks, operating methods, etc., the service life is currently extended to 220 to 230 times.
【0007】[0007]
【発明が解決しようとする課題】ところで、製錬コスト
を低減するため生産量の増加が指向され、転炉において
は1炉当りのマット負荷をいかに増加するかが課題とな
る。このマット負荷はマットの銅品位を上げたり、処理
量自体を増加することとなるが、これに対処するには送
風量の増加や酸素富化の増加が考えられる。By the way, in order to reduce the smelting cost, it is aimed to increase the production amount, and how to increase the mat load per furnace in the converter is an issue. This mat load raises the copper grade of the mat and increases the treatment amount itself, but in order to deal with this, it is conceivable to increase the air flow rate and the oxygen enrichment.
【0008】しかしながら、酸素富化量をむやみに多く
することは局部的な反応熱の増大による羽口パイプや羽
口煉瓦の損傷を招き易く、又、送風量を多くするには送
風機の更新が必要な上、スプラッシュが多くなる欠点も
ある。However, excessively increasing the oxygen enrichment amount is likely to cause damage to the tuyere pipes and tuyere bricks due to local increase in reaction heat, and in order to increase the air blowing amount, it is necessary to renew the blower. In addition to being necessary, it also has the drawback of increasing splash.
【0009】酸素富化を一定限度に抑え、送風量の増加
も得策でないとすれば、残る手段は羽口パイプの口径を
小さくして送風速度を大きくすることである。然るに羽
口パイプの口径を小さくして羽口ボックスもそれに合わ
せて変更することにすると設備投資が必要になる上、マ
ット負荷が軽減された場合は再び羽口回りの付帯設備を
変更しなければならず、これもあまり経済的な方法では
ない。If oxygen enrichment is limited to a certain limit and increasing the amount of air flow is not a good idea, the remaining means is to reduce the diameter of the tuyere pipe and increase the air flow rate. However, if the diameter of the tuyere pipe is reduced and the tuyere box is changed accordingly, capital investment will be required, and if the mat load is reduced, the incidental equipment around the tuyere must be changed again. No, this is also not a very economical method.
【0010】本発明の目的は最小限のコストでマット負
荷の変動に対応して操業することが可能な転炉を提供す
ることにある。An object of the present invention is to provide a converter capable of operating in response to fluctuations in mat load at a minimum cost.
【0011】[0011]
【課題を解決するための手段】上記目的を達成するため
本発明の非鉄金属製錬用転炉は、羽口ボックス取付部が
共通でかつ本体部の内径が異なる複数種の羽口パイプか
らマット負荷に応じた内径のパイプを選択して取付け、
羽口1本当りの送風量は実質的に変えずに送風速度のみ
を変更し得るようにした点に特徴がある。In order to achieve the above object, a non-ferrous metal smelting converter according to the present invention comprises a plurality of types of tuyere pipes having a common tuyere box mounting portion and different main body inner diameters. Select a pipe with an inner diameter according to the load and install it,
It is characterized in that only the air flow rate can be changed without substantially changing the air flow rate per tuyere.
【0012】[0012]
【作用】本発明の転炉に用いる羽口パイプは従来使用の
ものに加え、羽口ボックス取付部が共通で本体部の内径
を小さくした羽口パイプを2〜3種用意して、マット負
荷が大きくなるに従って小内径の羽口パイプを、マット
負荷の軽減に従って内径の大きい羽口パイプを選択して
取付ける。In addition to the conventional tuyere pipes used in the converter of the present invention, 2-3 types of tuyere pipes having the same inner diameter of the main body and having a common tuyere box mounting portion are prepared for mat loading. The smaller the inner diameter of the tuyere pipe, the larger the inner diameter of the tuyere pipe.
【0013】羽口パイプは、本体部の外径を従来使用の
ものと同一径にした肉厚パイプでも良いし、本体部の外
径も内径に合わせて細くした段付きパイプであっても良
く、羽口ボックス取付部は羽口ボックスに対して互換性
があるよう共通にする。これにより少くとも羽口回りの
付帯設備を交換しなくて済む。The tuyere pipe may be a thick-walled pipe in which the outer diameter of the main body is the same as that of the conventional one, or a stepped pipe in which the outer diameter of the main body is made thin according to the inner diameter. , The tuyere box attachment is common so that it is compatible with the tuyere box. As a result, it is not necessary to replace the auxiliary equipment around the tuyere at least.
【0014】肉厚パイプの場合は羽口煉瓦は従来型で良
いが、段付きパイプの場合は羽口煉瓦との間の隙間が開
き過ぎるので、口径の小さい羽口煉瓦にするのが望まし
い。このような構造にすれば羽口煉瓦の溶損に対する抵
抗力が増し、炉の寿命延長にも効果的である。In the case of a thick pipe, the tuyere brick may be of a conventional type, but in the case of a stepped pipe, a gap between the tuyere brick and the tuyere brick is too wide, and therefore it is desirable to use a tuyere brick having a small diameter. With such a structure, the resistance of the tuyere brick to melting damage increases, and it is also effective for extending the life of the furnace.
【0015】羽口パイプの内径を小さくして送風速度を
大きくすると、酸化反応が羽口先端より前方で起り、又
送風の冷却効果で羽口パイプ及び羽口煉瓦が保護され
る、という両方の効果で羽口の溶損が抑えられ炉の寿命
が僅かながら向上するというメリットもある。When the inner diameter of the tuyere pipe is reduced to increase the air blowing speed, an oxidation reaction occurs in front of the tip of the tuyere, and the tuyere pipe and the tuyere brick are protected by the cooling effect of the air blowing. Due to the effect, melting loss of tuyere is suppressed and the life of the furnace is slightly improved.
【0016】[0016]
【実施例】図1は肉厚羽口パイプを用いた転炉の局部断
面図、図2は段付き羽口パイプを用いた転炉の局部断面
図、図3は従来の羽口パイプを用いた転炉の局部断面図
であり、羽口パイプ11,12,13は転炉外皮2に溶
接された羽口スタンド3に保持される羽口ボックス4に
ネジ込み方式で取付けられ、溶損した羽口煉瓦は取外さ
れ、外皮1に不定形耐火物5を介して羽口煉瓦6を積み
直してある。EXAMPLES FIG. 1 is a partial sectional view of a converter using a thick tuyere pipe, FIG. 2 is a partial sectional view of a converter using a stepped tuyere pipe, and FIG. 3 is a conventional tuyere pipe. FIG. 3 is a partial cross-sectional view of the converter, in which the tuyere pipes 11, 12 and 13 are attached to the tuyere box 4 held by the tuyere stand 3 welded to the converter skin 2 by a screwing method and melted. The tuyere bricks have been removed, and the tuyere bricks 6 have been reloaded on the outer skin 1 with the amorphous refractory material 5 interposed therebetween.
【0017】肉厚パイプ11及び段付きパイプ12の根
元部内面は図示しない羽口打開棒が円滑に侵入し得るよ
う幾分傾斜した面に仕上げられ、図2に示す段付きパイ
プ12を使用する場合は羽口煉瓦の孔径は図1及び図3
に示す羽口孔径より小口径とされている。The inner surfaces of the roots of the thick-walled pipe 11 and the stepped pipe 12 are finished to be slightly inclined so that a tuyere breaking rod (not shown) can smoothly enter, and the stepped pipe 12 shown in FIG. 2 is used. In this case, the hole diameter of the tuyere brick is
The diameter is smaller than the tuyere diameter shown in.
【0018】これら3種の羽口パイプを実際に用いた結
果を表1にまとめて示す。The results of actual use of these three types of tuyere pipes are summarized in Table 1.
【0019】[0019]
【表1】 [Table 1]
【0020】表1の結果からマット品位が高く、処理量
が多いにもかかわらず。送風速度を大きくすることによ
り炉の寿命が僅かながら延びたことが分る。From the results shown in Table 1, the matte quality is high and the treatment amount is large. It can be seen that the life of the furnace was slightly extended by increasing the blowing speed.
【0021】[0021]
【発明の効果】本発明の転炉により、マット負荷の変動
に適確に対応することができ、コスト削減に大きく貢献
できた。尚本発明の転炉は銅製錬に限定されるものでな
く、ニッケル製錬等にも適用できることは言うまでもな
い。EFFECTS OF THE INVENTION The converter according to the present invention can appropriately respond to the fluctuation of the mat load and can greatly contribute to the cost reduction. Needless to say, the converter of the present invention is not limited to copper smelting and can be applied to nickel smelting and the like.
【図1】肉厚羽口パイプを用いた転炉の局部断面図であ
る。FIG. 1 is a partial cross-sectional view of a converter using a thick tuyere pipe.
【図2】段付き羽口パイプを用いた転炉の局部断面図で
ある。FIG. 2 is a partial sectional view of a converter using a stepped tuyere pipe.
【図3】従来の羽口パイプを用いた転炉の局部断面図で
ある。FIG. 3 is a local sectional view of a converter using a conventional tuyere pipe.
11 肉厚羽口パイプ 12 段付き羽口パイプ 13 従来の羽口パイプ 2 転炉外皮 3 羽口スタンド 4 羽口ボックス 5 不定形耐火物 6 羽口煉瓦 11 Thick Tuyere Pipe 12 Stepped Tuyere Pipe 13 Conventional Tuyere Pipe 2 Converter Outer Shell 3 Tuyere Stand 4 Tuyere Box 5 Unshaped Refractories 6 Tuyere Brick
Claims (1)
の内径が異なる複数種の羽口パイプからマット負荷に応
じた内径のパイプを選択して取付け、羽口1本当りの送
風量は実質的に変えずに送風速度を変更し得るようにし
た非鉄金属製錬用転炉。1. A tuyere box mounting portion is common and a main body portion having different inner diameters is selected from a plurality of tuyere pipes having an inner diameter according to a mat load and mounted, and the amount of air blown per tuyere is A non-ferrous metal smelting converter that allows the blowing speed to be changed without substantially changing it.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6178285A JPH0842979A (en) | 1994-07-29 | 1994-07-29 | Converter for refining non-ferrous metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6178285A JPH0842979A (en) | 1994-07-29 | 1994-07-29 | Converter for refining non-ferrous metal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0842979A true JPH0842979A (en) | 1996-02-16 |
Family
ID=16045799
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6178285A Pending JPH0842979A (en) | 1994-07-29 | 1994-07-29 | Converter for refining non-ferrous metal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0842979A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019135437A (en) * | 2018-02-05 | 2019-08-15 | パンパシフィック・カッパー株式会社 | Copper smelting converter |
-
1994
- 1994-07-29 JP JP6178285A patent/JPH0842979A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019135437A (en) * | 2018-02-05 | 2019-08-15 | パンパシフィック・カッパー株式会社 | Copper smelting converter |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |