JPS5921552A - Blast furnace molten slag granulation control - Google Patents
Blast furnace molten slag granulation controlInfo
- Publication number
- JPS5921552A JPS5921552A JP12899782A JP12899782A JPS5921552A JP S5921552 A JPS5921552 A JP S5921552A JP 12899782 A JP12899782 A JP 12899782A JP 12899782 A JP12899782 A JP 12899782A JP S5921552 A JPS5921552 A JP S5921552A
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- molten slag
- slag
- furnace molten
- 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
- Curing Cements, Concrete, And Artificial Stone (AREA)
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】
本発明(」、高炉溶融スラグをガス・アトマイズ法にて
微粒化する際のt)″1化制御法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control method for controlling t) when blast furnace molten slag is atomized by gas atomization.
高炉スラグは約1500℃の溶融状9景で排出され−r
いる。この保有する熱を=効果的に回収するために、ガ
ス・アトマイズ法にてj″i′7i′7状化が行われて
いる。この粒化け、−般的には、供給する溶融スラグ駿
を検出し、−それに見合うがス付をif、ス/ズルより
噴出させ、スラグと衝突させることによりおこなわれて
いる。Blast furnace slag is discharged in a molten state at approximately 1500℃.
There is. In order to effectively recover this retained heat, the gas atomization method is used to convert the heat into j''i'7i'7. This is done by detecting the slag, ejecting the slag from the slag, and colliding with the slag.
ところが、M融スラグは第2図に示すように粘度が高く
目つ温度が低下すると1<8、激に粘度が上昇し、流動
性が悪化する。又、凝固潜熱が小さいのに加えて、熱伝
導も10〜20km(イ)hr’Cと同様に低いので、
冷たいものに触れると、接触部のみ凝固して12甘うた
め、溶液特性としても、又装置1イア的にも流、 B1
の測定が困難で、粒化のだめの適性な力スの制御1が出
来なかった。又通常の液体でシづ1、ガスMを過度に(
1(給すれば、粒径が苓干細かく外るだけであるが、高
炉スラグの場合には鉱滓イ・帛(以F−ウール)が弁、
牛し、操業に岩し2い騙饗を及(丁(−1J(きな問題
となっている。However, as shown in FIG. 2, M molten slag has a high viscosity, and when the temperature decreases (1<8), the viscosity increases dramatically and fluidity deteriorates. In addition, in addition to the low latent heat of solidification, the heat conduction is also as low as 10 to 20 km (a) hr'C.
If you touch something cold, only the contact area will solidify and it will become sweet, so it will change both the solution properties and the equipment 1 ear.B1
It was difficult to measure this, and it was not possible to control the appropriate force for granulation. Also, if you use normal liquid, do not use excessive amount of gas M (
1 (If you feed it, the particle size will only be fine, but in the case of blast furnace slag, slag (hereinafter referred to as F-wool) is used as a valve,
This has become a major problem due to the large amount of fraud that has occurred in the company's operations.
本゛11)明に1この」、うな難点を解決するためにな
さtl/こもので、その要旨とするところは、19!+
l枦iW r*hス弓グをガス・−γトー、イズ法に
より微朴[什する方法においで、ガスノズルからのがス
吐出方向中心に対する、Q化後の心′l子の飛翔角度の
うち、伏角を検出し2て、核伏角が予め定めた+11.
曲内に収捷るように7″トマイズガス量を制餌1″′j
′ること全特徴とする高炉溶融スラグの粒化側N法にあ
る。This book was written to solve this problem, and its gist is 19! +
In this method, the flight angle of the core after Qization with respect to the center of the gas discharge direction from the gas nozzle is Among them, the inclination angle is detected and the nuclear inclination angle is +11.
Control the amount of 7″ Tomize gas by 1″’j so that it converges within the song.
The main feature of this method is the N method for granulating blast furnace molten slag.
以下、添(=Jの図面によって本発明の詳細な説明する
。Hereinafter, the present invention will be explained in detail with reference to the attached drawings (=J).
第1図は本発明の制御フローを示したものである。溶融
スラグはタンディツシュ1か−、スラグ柱流2となって
流下する。タンディツシュ下部に配fffされたエア・
ノズル3がら噴射するがスと、該スラグ柱流2が衝突し
て、スラグ柱流は、破砕さf1粒状となって、飛翔する
。この時の粒子の飛翔角は、スラグ清とエア用の割合に
よって決まる。FIG. 1 shows the control flow of the present invention. The molten slag flows down as a tundish 1 or as a slag column 2. Air distributed at the bottom of the tanditshu
The slag column 2 collides with the gas injected from the nozzle 3, and the slag column is crushed into f1 particles and sent flying. The flight angle of the particles at this time is determined by the ratio of slag clearing and air.
即ち、スラグ缶に対し、エア量が少な−場合は、粒化が
不十分で粒子径が大きく、且つ、伏角も大きくなる。エ
ア用を増加して行くと、粒化が良好で粒子も細かくなり
、伏角も小さぐなる。更に工’r 61を増]〜でゆく
と、しばらくは、粒化が良好な状態が続き、伏角も連続
的に小さく力るが、やがて、ウールの発生が増大して来
て、生成した粒子がウールに付着し、粒子とウー ルの
混在した塊が出来る。そとで、エア敏を減少してゆくと
、ウー、ルの発生が減小し、前述のウールと粒子の混在
塊は消滅する。このように高炉スラグの場合、エア(仕
が少なければ、粒化不良となって粗粒が発生し7、多過
ぎると、ウールが増大し、十れ着−の関係は、イ1゛7
化後の粒子の飛散する角度、’l¥に粒子の飛散−7j
向とエアノズルからの気体の吐出方向中心とのなす角、
即ち伏角との間に一定の関係があることがわかった。従
って、オ\“を化時の伏角を2つの許容限界角度、即ち
第1図1・ておいてギ<7化限界であるα1とウール発
生許容限界であるαZとの間にイ・1[持[7てれ°l
化を行うと、ウール発生も少なく、、tQ化も安71=
シて+j]能である。例えばスラグの処+’!)! ’
tjiが;3〜4t/Hの場合(R: 、ウール発牛車
ケ10%以下に抑オーで粒化を行う際、αl 、α2は
夫々45″及び2 (1’であり伏角を45°〜200
内に維持するのが14、い。本発明では、このα1 、
α2を例えば光学的検出装置4を用いて検出し2、制仙
)器5を介して調節tP 6を作動させ、粒化時の伏角
α乞・α1〜α。That is, when the amount of air is small for a slag can, granulation is insufficient, the particle size is large, and the angle of inclination is also large. When the amount of air used is increased, granulation becomes better, the particles become finer, and the angle of inclination becomes smaller. Furthermore, as the process progresses to 61, the granulation continues to be good for a while, and the angle of inclination continues to decrease, but eventually the generation of wool increases, and the generated particles The particles adhere to the wool, forming a mixture of particles and wool. As the air sensitivity decreases, the occurrence of wool and particles decreases, and the aforementioned mixed lump of wool and particles disappears. In this way, in the case of blast furnace slag, if there is too little air, granulation will be poor and coarse grains will be generated.7 If there is too much air, wool will increase, and the relationship between
The scattering angle of particles after conversion, 'l¥ and particle scattering -7j
The angle between the direction and the center of the gas discharge direction from the air nozzle,
In other words, it was found that there is a certain relationship between the slope and the angle of inclination. Therefore, the angle of inclination at the time of forming O\" is between two allowable limit angles, i.e., α1, which is the limit for G<7, and αZ, which is the allowable limit for wool generation. Hold[7tere°l
When this process is carried out, there is less wool generation and the tQ conversion is also lower 71=
It is possible. For example, the slag place +'! )! '
When tji is; 3 to 4 t/H (R:), when graining is carried out by suppressing the wool to 10% or less, αl and α2 are 45'' and 2 (1', respectively, and the inclination angle is 45° to 45°). 200
It's 14 to keep it within. In the present invention, this α1,
Detect α2 using, for example, an optical detection device 4, and actuate the adjustment tP6 via the control device 5 to determine the angle of inclination α during granulation.α1~α.
間に維持するようにエアM−を制御J゛るものである1
、本発明によれば高炉溶融スラグの微細化にあ〃−リウ
ール発生も少なくかつ粒化が’jt’ ′l’+l L
、で行なわれうるという効果が奏されるものである。The air M- is controlled so as to be maintained between 1 and 1.
According to the present invention, the blast furnace molten slag can be made finer, with less reeule generation and granulation.
The effect is that it can be carried out with .
第1図は本発明に係る粒化制御フロー図、第2図tま高
炉スラグの温度と粒度の関係を示す図である。
特許出願人 新日本製鐵株式會社
1 ”−’−”’−’rFIG. 1 is a granulation control flow diagram according to the present invention, and FIG. 2 is a diagram showing the relationship between temperature and particle size of blast furnace slag. Patent applicant Nippon Steel Corporation 1 ”-'-”'-'r
Claims (1)
する方法ておいて、ガスノズルからのガス吐出方向中心
に対する、粒化後の粒子の飛翔角度のうち、伏角を検出
して、該伏角がfめ定めた範囲内に収するようにアトマ
イズガス間−を制御することを特徴とする高炉溶融スラ
グの粒化制御法。j☆1 In a method of atomizing furnace molten slag by gas atomization, an inclination angle is detected among the flying angles of particles after granulation with respect to the center of the gas discharge direction from a gas nozzle, and the inclination angle is determined to be f. 1. A method for controlling the granulation of blast furnace molten slag, the method comprising controlling the atomization gas so as to keep it within a predetermined range.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12899782A JPS5921552A (en) | 1982-07-26 | 1982-07-26 | Blast furnace molten slag granulation control |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12899782A JPS5921552A (en) | 1982-07-26 | 1982-07-26 | Blast furnace molten slag granulation control |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5921552A true JPS5921552A (en) | 1984-02-03 |
JPH0236538B2 JPH0236538B2 (en) | 1990-08-17 |
Family
ID=14998577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12899782A Granted JPS5921552A (en) | 1982-07-26 | 1982-07-26 | Blast furnace molten slag granulation control |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5921552A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4919110A (en) * | 1987-07-25 | 1990-04-24 | Paloma Kogyo Kabushiki Kaisha | Gas cooking appliance |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS572047A (en) * | 1980-06-06 | 1982-01-07 | Hitachi Ltd | Two color electrostatic recording method |
-
1982
- 1982-07-26 JP JP12899782A patent/JPS5921552A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS572047A (en) * | 1980-06-06 | 1982-01-07 | Hitachi Ltd | Two color electrostatic recording method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4919110A (en) * | 1987-07-25 | 1990-04-24 | Paloma Kogyo Kabushiki Kaisha | Gas cooking appliance |
Also Published As
Publication number | Publication date |
---|---|
JPH0236538B2 (en) | 1990-08-17 |
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