JPS5814484B2 - Kourosinodatsuriyuhouhou - Google Patents
KourosinodatsuriyuhouhouInfo
- Publication number
- JPS5814484B2 JPS5814484B2 JP13703575A JP13703575A JPS5814484B2 JP S5814484 B2 JPS5814484 B2 JP S5814484B2 JP 13703575 A JP13703575 A JP 13703575A JP 13703575 A JP13703575 A JP 13703575A JP S5814484 B2 JPS5814484 B2 JP S5814484B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- blast furnace
- furnace slag
- oxygen
- 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.)
- Expired
Links
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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Furnace Details (AREA)
Description
【発明の詳細な説明】
本発明は高炉より排出された高炉滓を滓樋及び受滓鍋に
おいて説流する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for discharging blast furnace slag discharged from a blast furnace in a slag gutter and a slag receiving pot.
近年、高炉滓は鉄鋼生産の飛躍的な増大に伴い、その排
出量は増大し続け、現在わが国においては年間約200
0万tonにも達している。In recent years, with the dramatic increase in steel production, the amount of blast furnace slag discharged has continued to increase, and currently in Japan, approximately 200 slags are emitted annually.
It has reached 1,000,000 tons.
しかしながら高炉滓の利用については鉄鋼製品の陰にか
くれて余り目立たず、ごく一部がセメント原料として利
用されている程度であり、大半は処理に困り低地、海な
どの埋立てに捨てられているのが実状である。However, the use of blast furnace slag is hidden behind steel products and is not very noticeable.Only a small portion is used as raw material for cement, and the majority is difficult to dispose of and is discarded in landfills in lowlands, the sea, etc. This is the actual situation.
従って高炉滓の有効利用の道が開かれれば厄介な処理問
題が解決するだけでなく、未利用資源の開発として製鉄
業の発展に極めて重要であると考えられる。Therefore, if a path to effective use of blast furnace slag is opened, it will not only solve the troublesome disposal problem, but will also be extremely important for the development of the steel industry as the development of an unused resource.
本発明はこのような問題に対処すべく発明した?のであ
り、高炉滓を溶銑の脱硫剤として有効利用しようとする
ものである。Was this invention invented to address these problems? The aim is to effectively utilize blast furnace slag as a desulfurization agent for hot metal.
高炉滓の溶銑用脱硫剤としての有効利用に関しては、本
出願人が先に出願した特願昭50−118549号「溶
銑の連続脱硫方法」により低硫黄含有量高炉滓(S%0
.2以下)とホタル石の混合脱硫剤は十分脱硫能を有す
ることを提案している。Concerning the effective use of blast furnace slag as a desulfurization agent for hot metal, the present applicant has previously filed Japanese Patent Application No. 118549/1983 entitled "Continuous desulfurization method for hot metal".
.. It is proposed that a mixed desulfurization agent containing fluorite (2 or less) and fluorspar has sufficient desulfurization ability.
ところで高炉滓の脱硫は一部研究者によって実験的研究
がなされており、溶融状態の高炉滓に酸素を吹込むこと
で(1)式による気化脱硫が起こると報告されている。By the way, some researchers have conducted experimental studies on desulfurization of blast furnace slag, and it has been reported that vaporization desulfurization according to equation (1) occurs by blowing oxygen into molten blast furnace slag.
S ”−+3/20=SO2+O−− ・・・・・・
・・・・・(1)この時溶滓と接する気相の酸素分圧が
高いほど、又溶滓中の酸素ポテンシャルが高いほど気化
脱硫が促進されると考えられている。S”-+3/20=SO2+O-- ・・・・・・
(1) It is believed that the higher the oxygen partial pressure of the gas phase in contact with the slag and the higher the oxygen potential in the slag, the more the vaporization desulfurization is promoted.
本発明者等は工業的規模での高炉滓の脱硫を行なうため
に種々研究の結果、溶融状態の高炉滓に酸素ガスを吹込
み、溶滓および溶滓と接する気相の酸素ポテンシャルを
十分高く保つことが有効であることに鑑み、高炉より出
銑時等に排出される溶融状態の高炉滓流、つまり高炉か
ら受滓鍋に入るまでの間の滓流に鉄鋼石を加えながら酸
素ガスを吹き込むことが極めて有効であることを確認し
たものである。As a result of various studies to desulfurize blast furnace slag on an industrial scale, the present inventors injected oxygen gas into the molten blast furnace slag to raise the oxygen potential of the slag and the gas phase in contact with the slag to a sufficiently high level. Considering that it is effective to maintain the slag, we added iron ore to the molten blast furnace slag discharged from the blast furnace during tapping, that is, the slag flow from the blast furnace to the slag receiving pot, while adding oxygen gas. It was confirmed that blowing into the air is extremely effective.
この際加える鉄鋼石は、高炉滓流の流動性等を鑑み、十
分な脱硫を計るためには被処理高炉滓に対し1.6〜2
. 0 w t%添加する必要がある。Considering the fluidity of the blast furnace slag, the amount of iron ore added at this time should be 1.6 to 2
.. It is necessary to add 0 wt%.
また反応促進のため細粒状がよく、粒度5關以下が望ま
しい。Further, in order to promote the reaction, fine particles are preferable, and a particle size of 5 degrees or less is desirable.
一方、吹き込む酸素ガスは前述の(1)式から求まる理
論酸素量以上の酸素を滓樋部及び受滓鍋上部から十分に
混合接触されるように供給することが必要である。On the other hand, the oxygen gas to be blown needs to be supplied from the slag trough and the upper part of the slag receiving pot so that the amount of oxygen is sufficient to mix and contact the slag trough and the upper part of the slag receiving pan.
この場合、溶滓流に対しよく混合するように配慮された
ランスを用いるとよい。In this case, it is preferable to use a lance that is designed to mix well with the slag flow.
通常の消耗型あるいは水冷ランス等を用い、溶滓流と酸
素流を対向せしめると効果的である。It is effective to use a conventional consumable lance or a water-cooled lance to make the slag flow and the oxygen flow oppose each other.
図面は本発明の実施態様を示すもので、高炉1の出滓口
2より排出された溶滓9はスキンマー3から溶銑と分離
し滓樋4に流れ込み受滓鍋6に達する鉄鋼石10は、溶
滓がスキンマ−3で溶銑と分離した直後の滓樋4上部及
び、受滓鍋6に流れ込む直前の滓樋4最下部からベルト
コンベア11によって一定速度が投入する。The drawing shows an embodiment of the present invention, in which slag 9 discharged from the slag outlet 2 of the blast furnace 1 is separated from hot metal from the skinmer 3, flows into the slag trough 4, and reaches the slag receiving ladle 6. The slag is fed at a constant speed by a belt conveyor 11 from the upper part of the slag trough 4 immediately after it is separated from the hot metal in the skimmer 3 and from the bottom of the slag trough 4 just before it flows into the slag receiving pot 6.
酸素ガスは滓樋カバー5に配置されたランス7及び受滓
鍋6上に設置されたランス8により滓に吹込まれる。Oxygen gas is blown into the slag by a lance 7 placed on the slag gutter cover 5 and a lance 8 placed on the sludge receiving pan 6.
これらのランスはいずれも消耗型である。Both of these lances are expendable.
ランス7は溶滓流をよく混合するため向流的に設置され
、かつラノス先端が溶滓に接触している。The lance 7 is installed countercurrently to mix the slag flow well, and the lance tip is in contact with the slag.
又ランス8も同様に溶滓とほぼ接触し、溶滓レベルの上
昇に応じ昇降可能としている。Similarly, the lance 8 is almost in contact with the slag and can be moved up and down as the level of the slag rises.
以下本発明の実施例を示す。Examples of the present invention will be shown below.
酸素ガス純度 99.6%
処理時間 150分間
以上の条件によって行なった結果得られた高炉滓の成分
組成(処理後)を第1表に示す。Table 1 shows the composition (after treatment) of the blast furnace slag obtained as a result of the treatment under conditions of oxygen gas purity of 99.6% and treatment time of 150 minutes or more.
以上のとおり本発明は、高炉出銑時に高炉滓の脱硫を行
なうため特に受滓鍋流入時は激しい攪拌混合によって供
給酸素の反応効率が高<、シたがって脱硫反応が能率よ
く促進される結果極めて効率よく高炉滓中の硫黄含有量
を安定して0.2%以下とすることができ、溶銑用脱硫
剤としての高炉滓の有効利用を可能ならしめるものであ
る。As described above, the present invention desulfurizes the blast furnace slag during blast furnace tapping, so the reaction efficiency of the supplied oxygen is high due to vigorous stirring and mixing, especially when the slag flows into the slag receiving pot. Therefore, the desulfurization reaction is efficiently promoted. The sulfur content in blast furnace slag can be stably reduced to 0.2% or less extremely efficiently, and the blast furnace slag can be effectively used as a desulfurization agent for hot metal.
なお、本発明は高炉出銑時の作業に支障をきたすことな
く、かつ特殊な装置を使用することもなく、従来の設備
で容易に行なうことができる利点もあり産業上極めて有
益な発明である。Furthermore, the present invention has the advantage that it can be easily carried out with conventional equipment without interfering with the work during blast furnace tapping and without using special equipment, making it an extremely useful invention industrially. .
図面は本発明の実施態様の一例を示す説明図である。
1・・・・・・高炉、2・・・・・・出滓口、3・・・
・・・スキンマー、4・・・・・・滓樋、5・・・・・
・滓カバー、6・・・・・・受滓鍋、7・・・・・・滓
カバ一部酸素ランス、8・・・・・・受滓鍋部酸素ラン
ス、9・・・・・溶融高炉滓、10・・・・・・鉄鉱石
、11・・・・・・鉄鉱石添加用ベルトコンベア。The drawings are explanatory diagrams showing an example of an embodiment of the present invention. 1...Blast furnace, 2...Slag outlet, 3...
... skimmer, 4 ... slag, 5 ...
・Slag cover, 6... Slag receiving pot, 7... Slag cover part oxygen lance, 8... Slag receiving pot part oxygen lance, 9... Melting Blast furnace slag, 10...iron ore, 11...belt conveyor for adding iron ore.
Claims (1)
鉱石を被処理高炉滓に対し1.0〜2.0wt%の割合
で添加しつつ気体酸素を吹き込むことを特徴とする高炉
滓の脱流方法。1 Blast furnace slag characterized by adding fine grained iron ore to the blast furnace slag discharged from the blast furnace in a molten state at a ratio of 1.0 to 2.0 wt% relative to the blast furnace slag to be treated and blowing gaseous oxygen into the blast furnace slag. Deflow method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13703575A JPS5814484B2 (en) | 1975-11-14 | 1975-11-14 | Kourosinodatsuriyuhouhou |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13703575A JPS5814484B2 (en) | 1975-11-14 | 1975-11-14 | Kourosinodatsuriyuhouhou |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5261113A JPS5261113A (en) | 1977-05-20 |
JPS5814484B2 true JPS5814484B2 (en) | 1983-03-19 |
Family
ID=15189314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13703575A Expired JPS5814484B2 (en) | 1975-11-14 | 1975-11-14 | Kourosinodatsuriyuhouhou |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5814484B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100878671B1 (en) * | 2002-10-07 | 2009-01-13 | 주식회사 포스코 | A method of desulfurization in desulfurization slag of molten iron |
KR101277173B1 (en) * | 2009-11-10 | 2013-06-19 | 주식회사 포스코 | Method for desulfurizing of slag |
-
1975
- 1975-11-14 JP JP13703575A patent/JPS5814484B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5261113A (en) | 1977-05-20 |
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