JPH0481734B2 - - Google Patents
Info
- Publication number
- JPH0481734B2 JPH0481734B2 JP61246824A JP24682486A JPH0481734B2 JP H0481734 B2 JPH0481734 B2 JP H0481734B2 JP 61246824 A JP61246824 A JP 61246824A JP 24682486 A JP24682486 A JP 24682486A JP H0481734 B2 JPH0481734 B2 JP H0481734B2
- Authority
- JP
- Japan
- Prior art keywords
- measurement
- microwave
- level
- gate
- dielectric
- 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 - Lifetime
Links
- 238000005259 measurement Methods 0.000 claims description 50
- 238000010926 purge Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000010445 mica Substances 0.000 claims description 7
- 229910052618 mica group Inorganic materials 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 239000000428 dust Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高温の転炉等の金属精錬炉内の溶融
金属レベル等を非接触で測定するマイクロ波レベ
ル測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a microwave level measuring device that non-contactly measures the level of molten metal in a metal refining furnace such as a high-temperature converter.
（従来の技術）
第６図は特開昭58−28654の転炉スロツピング
予知装置を示す。溶銑ａ、スラグｂを収容する転
炉ｃの上方のOGフードｄを貫通しジヤケツトｅ
を設けその上にマイクロ波アンテナｆを配置し、
マイクロ波発生回路ｇ、信号処理回路ｈと接続し
たマイクロ波回路ｉによりマイクロ波を湯面に放
射する。炉内の高温ガスの影響を受けないように
ジヤケツト内部はN2ガス等でパージを行い、ア
ンテナは水冷構造としている。(Prior Art) FIG. 6 shows a converter slopping prediction device disclosed in Japanese Patent Application Laid-Open No. 58-28654. A jacket e passes through the OG hood d above the converter c, which houses hot metal a and slag b.
and place a microwave antenna f on it,
A microwave circuit i connected to a microwave generation circuit g and a signal processing circuit h radiates microwaves to the hot water surface. The inside of the jacket is purged with N2 gas to avoid being affected by the high-temperature gas inside the furnace, and the antenna has a water-cooled structure.
第７図は実開昭60−152974のマイクロ波距離測
定装置を示す。 FIG. 7 shows a microwave distance measuring device of Utility Model Application No. 60-152974.
信号処理回路ｈに接続したマイクロ波回路ｉお
よびアンテナｆをジヤケツトｅの冷却ボツクス内
に配置しその下部に繊維層からなる熱・ダスト遮
へい板ｊを設け、上方から冷却空気ｋを流し遮へ
い板のところで溶銑ａからの高温ガスｌに対抗さ
せている。 A microwave circuit i connected to a signal processing circuit h and an antenna f are arranged in a cooling box of a jacket e, a heat/dust shielding plate j made of a fiber layer is provided below, and cooling air k is flowed from above to cool the shielding plate. By the way, it is made to oppose high-temperature gas l from hot metal a.
（発明が解決しようとする問題点）
マイクロ波を用いて高温炉内の内容物のレベル
を測定する装置において問題となる点は、（）
高温ガスによる影響、（）炉内のダストや地金
の飛散、付着の影響に対する対策である。(Problems to be Solved by the Invention) The problems with a device that uses microwaves to measure the level of contents in a high-temperature furnace are ()
This is a countermeasure against the effects of high-temperature gas and () the effects of scattering and adhesion of dust and metal in the furnace.
特開昭58−28654の従来技術では内部をガス・
パージするジヤケツトと水冷構造にしたアンテナ
とにより高温の影響は回避できるが、炉内のダス
トがアンテナ内に侵入するため不要なマイクロ波
雑音が生じ、測定精度が劣化する。 The conventional technology disclosed in JP-A No. 58-28654 uses gas inside the
Although the effects of high temperatures can be avoided by using a purging jacket and a water-cooled antenna, unnecessary microwave noise is generated as dust from within the furnace enters the antenna, which deteriorates measurement accuracy.
また実開昭60−152974の従来技術では繊維層板
の通気抵抗が大きいので、冷却空気の流量を充分
にとるころができず、温度上昇ならびにダストの
付着をまぬがれない。 Furthermore, in the prior art disclosed in Japanese Utility Model Application Publication No. 60-152974, the ventilation resistance of the fiber laminate is large, so it is not possible to obtain a sufficient flow rate of cooling air, resulting in an increase in temperature and the adhesion of dust.
さらに両者とも、マイクロ波アンテナあるいは
アンテナレドームが常に高温測定物体上にさらに
れた状態のままであるので、保守性が低下する。 Furthermore, in both cases, the microwave antenna or antenna radome remains suspended above the high temperature measurement object, which reduces maintainability.
（問題点を解決するための手段）
従来技術の上記問題点は、本発明においては、
次の諸手段により解決される。(Means for solving the problems) The above problems of the prior art are solved in the present invention.
This problem can be solved by the following measures.
すなわち、マイクロ波透過性にすぐれたマイカ
等の誘電体を測定窓として筒状の測定孔の上端の
水平移動可能な測定ゲートにガス・シール状態で
設けアンテナへのダストの侵入を遮り、誘電体板
下面をガス・パージしてダストの付着を防ぐ。測
定孔は水冷し下向ガス・パージして炉内の高温ガ
スを遮り飛散するダストおよび地金の付着を防止
する。そして非測定時にはゲートをシフトさせ、
誘電体測定窓を溶湯上の測定孔位置より退避させ
る。 In other words, a dielectric material such as mica, which has excellent microwave transparency, is installed as a measurement window in a horizontally movable measurement gate at the upper end of a cylindrical measurement hole in a gas-sealed state to block dust from entering the antenna. Gas purge the underside of the board to prevent dust from adhering to it. The measurement hole is water-cooled and subjected to downward gas purging to block high-temperature gas in the furnace and prevent the adhesion of scattered dust and metal. Then, when not measuring, shift the gate,
The dielectric measurement window is moved away from the measurement hole position above the molten metal.
これらの諸手段を総合して、本発明のマイクロ
波レベル測定装置は構成上、高温精錬炉の上部に
設けた水冷機構を有する筒状の測定孔と、該測定
孔の上端部をガス・シール可能なように設けた誘
電体測定窓を有する水平移動可能な測定ゲート
と、前記測定孔の上端より下方に向つてガス・パ
ージする機構と、前記誘電体窓の下面をガス・パ
ージする機構と、前記測定ゲートの上方に設けた
マイクロ波レーダー装置とからなることを特徴と
する。 By combining these means, the microwave level measuring device of the present invention has a cylindrical measurement hole equipped with a water cooling mechanism provided at the top of a high-temperature refining furnace, and a gas-sealed upper end of the measurement hole. a horizontally movable measurement gate having a dielectric measurement window provided as possible; a mechanism for gas purging downward from the upper end of the measurement hole; and a mechanism for gas purging the lower surface of the dielectric window. , and a microwave radar device provided above the measurement gate.
（作用）
本発明装置は、水冷ジヤケツト付筒状測定孔に
測定ゲートを設けそれに誘電体製のマイクロ波が
通過する測定窓を付設しその下面および測定孔内
を窒素ガス・パージする構成としたので次の諸作
用が生ずる。(Function) The device of the present invention has a structure in which a measurement gate is provided in a cylindrical measurement hole with a water-cooled jacket, a measurement window made of a dielectric material is attached to the measurement window through which microwaves pass, and the bottom surface of the measurement window and the inside of the measurement hole are purged with nitrogen gas. Therefore, the following effects occur.
() アンテナ内に侵入しようとするダストは誘
電体板で遮断され、安定な測定が可能となる。() Dust that attempts to enter the antenna is blocked by the dielectric plate, allowing stable measurements.
() 水冷ジヤケツト付筒状測定孔内の窒素ガ
ス・パージにより地金の付着および温度上昇を
防止できる。() Nitrogen gas purge inside the cylindrical measurement hole with water cooling jacket prevents metal adhesion and temperature rise.
() 誘電体板のガス・パージにより、ダストの
付着を防止できる。() Dust adhesion can be prevented by gas purging of the dielectric plate.
() 測定時以外は、ゲートを閉じるので、保全
性に優れる。() Excellent maintainability as the gate is closed except during measurement.
（実施例）
第１および２図は、転炉内の溶銑および炉床レ
ベルを測定する本発明のマイクロ波レベル測定装
置の実施例を示す。転炉上のOGフード１には溶
銑に向つて開口する水冷ジヤケツト付の筒状測定
孔２が設けられており、冷却水は入口３および出
口４を通つてジヤケツト内に流れる。その上部に
は窒素ガスを下向に吹込むパージ・スリツト５が
ある。測定孔２の上端部には、エヤーシリンダ６
に連結されて水平移動可能な測定ゲート７が設け
られている。測定ゲート７には測定孔とある位置
で一致する誘電体測定窓８が設けられており、誘
電体板９はスライドプレート１０によりガス・シ
ールして取付けられ、その下面に窒素ガスを吹込
むパージ・ノズル１１が窓の下方に設けられてい
る。１２はアンテナ、１３はマイクロ波回路で、
カバー１４で覆われている。マイクロ波回路１３
は外部の信号処理回路１５と接続され、さらにゲ
ート制御盤１６に接続される。(Embodiment) Figures 1 and 2 show an embodiment of the microwave level measuring device of the present invention for measuring the level of hot metal and hearth in a converter. The OG hood 1 above the converter is provided with a cylindrical measuring hole 2 with a water-cooled jacket that opens toward the hot metal, and the cooling water flows into the jacket through an inlet 3 and an outlet 4. At the top thereof, there is a purge slit 5 for blowing nitrogen gas downward. An air cylinder 6 is installed at the upper end of the measurement hole 2.
A horizontally movable measuring gate 7 is connected to the measuring gate 7 and is connected to the measuring gate 7. The measurement gate 7 is provided with a dielectric measurement window 8 that coincides with the measurement hole at a certain position, and the dielectric plate 9 is attached with a gas seal by a slide plate 10. - The nozzle 11 is provided below the window. 12 is an antenna, 13 is a microwave circuit,
It is covered with a cover 14. Microwave circuit 13
is connected to an external signal processing circuit 15 and further connected to a gate control panel 16.
測定窓の誘電体としてはマイカを用いる。材質
は500℃以上の耐熱性、不燃の耐熱性、吸水率0.4
％の耐水性に優れた積層マイカ板がよい。誘電率
は５以下（24GHz）でありマイクロ波透過性にす
ぐれている。また機械的に割れにくく、取扱いが
容易である。 Mica is used as the dielectric material of the measurement window. The material is heat resistant to over 500℃, non-flammable, and has a water absorption rate of 0.4.
A laminated mica board with excellent water resistance is recommended. It has a dielectric constant of 5 or less (24 GHz) and has excellent microwave transparency. It is also mechanically hard to break and easy to handle.
測定孔２は水冷および窒素ガス・パージにより
炉内の高温ガスおよび飛散する地金の付着が防止
される。マイカ板測定窓により炉内の細かいダス
トがアンテナに侵入することは防止される。マイ
カ板下面はガス・パージによりダスト付着が防止
され、マイクロ波の不要の反射波の発生が防止さ
れる。マイクロ波レベル計の信号処理回路１５は
ゲート制御盤１６よりゲートの開閉信号を入力
し、ゲートが開いている時に炉内のレベル測定を
行う。測定時以外はマイカ板を退避させるので保
全性にすぐれている。 The measurement hole 2 is cooled with water and purged with nitrogen gas to prevent attachment of high temperature gas in the furnace and scattered metal. The mica plate measurement window prevents fine dust inside the furnace from entering the antenna. Dust is prevented from adhering to the lower surface of the mica plate by gas purging, and unnecessary reflected microwave waves are prevented from being generated. The signal processing circuit 15 of the microwave level meter receives a gate opening/closing signal from the gate control panel 16, and measures the level inside the furnace when the gate is open. Since the mica plate is retracted except during measurement, it has excellent maintainability.
第３図は溶銑レベルの測定結果を示す。レベル
計の測定時間を0.1秒とし、10秒間連続測定した
時の測定値の標準偏差はσ＝60mmであり、サブラ
ンス法の測定精度σ＝70mmを上回る結果が得られ
た。この標準偏差には底吹き撹拌による湯面レベ
ルの変動分も含まれていることを考えると充分な
精度といえる。 Figure 3 shows the measurement results of the hot metal level. The measurement time of the level meter was set to 0.1 seconds, and the standard deviation of the measured values when continuously measured for 10 seconds was σ = 60 mm, which exceeded the measurement accuracy of the sublance method, σ = 70 mm. This standard deviation can be said to be sufficiently accurate considering that it also includes fluctuations in the melt level due to bottom-blown stirring.
第４図は１炉代を通じて本発明装置により湯面
レベルを測定した時の結果を従来のサブランス法
と比較して示す。本発明により精度のよい湯面測
定が可能となることがわかる。 FIG. 4 shows the results of measuring the molten metal level using the apparatus of the present invention throughout one furnace period in comparison with the conventional sublance method. It can be seen that the present invention makes it possible to measure the hot water level with high accuracy.
また本発明レベル計は炉底レベル測定にも適用
が可能である。 The level meter of the present invention can also be applied to hearth bottom level measurement.
第５図は排滓後の炉底レベルの測定結果を示
す。標準偏差はσ＝４mmで安定した結果が得られ
ており、簡便で精度のよい炉底管理が可能であ
る。 Figure 5 shows the measurement results at the bottom level of the furnace after slag was discharged. Stable results were obtained with a standard deviation of σ = 4 mm, allowing simple and accurate hearth bottom management.
（発明の効果）
上下吹き転炉の湯面および炉底レベル測定に本
発明装置を適用することにより、精度のよい測定
を行うことが可能となり、吹錬の安定化、精度の
よい炉底管理に寄与することができる。また保守
性がすぐれている。(Effects of the invention) By applying the device of the present invention to the measurement of the melt level and bottom level of a top-bottom blowing converter, it becomes possible to perform accurate measurements, resulting in stabilization of blowing and accurate bottom management. can contribute to It also has excellent maintainability.
第１図は本発明のマイクロ波レベル測定装置の
実施例の縦断側面および制御系統図、第２図はそ
の横断平面図、第３図は横軸に時間（秒）縦軸に
レベルｍをとつた溶銑レベルの測定結果を示す図
表、第４図は横軸にヒート回数、縦軸にレベルを
とり本発明装置とサブランス法の測定結果を比較
した図表、第５図は横軸に時間（秒）縦軸レベル
ｍをとり炉底レベルの測定結果を示す図表、第６
図は従来技術の１例の縦断側面および制御系統
図、第７図は従来技術の他例の縦断側面図であ
る。
１……OGフード、２……筒状測定孔、３……
冷却水入口、４……冷却水出口、５……パージ・
スリツト、６……エヤーシリンダ、７……測定ゲ
ート、８……誘電体測定窓、９……誘電体板、１
０……スライドプレート、１１……パージ・ノズ
ル、１２……アンテナ、１３……マイクロ波回
路、１４……カバー、１５……信号処理回路、１
６……ゲート制御盤、ａ……溶銑、ｂ……スラ
グ、ｃ……転炉、ｄ……OGフード、ｅ……ジヤ
ケツト、ｆ……マイクロ波アンテナ、ｇ……マイ
クロ波発生回路、ｈ……信号処理回路、ｉ……マ
イクロ波回路、ｊ……ダスト遮へい板、ｋ……冷
却空気、ｌ……高温ガス。
FIG. 1 shows a longitudinal side view and a control system diagram of an embodiment of the microwave level measuring device of the present invention, FIG. 2 shows a cross-sectional plan view thereof, and FIG. 3 shows time (seconds) on the horizontal axis and level m on the vertical axis. Figure 4 is a diagram showing the measurement results of the level of hot metal in the vine. Figure 4 is a diagram comparing the measurement results of the device of the present invention and the sublance method, with the number of heats on the horizontal axis and the level on the vertical axis. Figure 5 is a diagram showing the time (seconds) on the horizontal axis. ) Chart showing the measurement results of the hearth bottom level with the vertical axis level m, No. 6
The figure is a longitudinal side view and a control system diagram of one example of the prior art, and FIG. 7 is a longitudinal side view of another example of the prior art. 1...OG hood, 2...cylindrical measurement hole, 3...
Cooling water inlet, 4...Cooling water outlet, 5...Purge
Slit, 6... Air cylinder, 7... Measurement gate, 8... Dielectric measurement window, 9... Dielectric plate, 1
0...Slide plate, 11...Purge nozzle, 12...Antenna, 13...Microwave circuit, 14...Cover, 15...Signal processing circuit, 1
6...Gate control panel, a...Hot metal, b...Slag, c...Converter, d...OG hood, e...Jacket, f...Microwave antenna, g...Microwave generation circuit, h ...Signal processing circuit, i...Microwave circuit, j...Dust shielding plate, k...Cooling air, l...High temperature gas.
Claims (1)
筒状の測定孔と該測定孔の上端部にガス・シール
可能なように設けた誘電体測定窓を有する水平移
動可能な測定ゲートと、前記測定孔の上端より下
方に向つてガス・パージする機構と、前記誘電体
窓の下面をガス・パージする機構と、前記測定ゲ
ートの上位に設けたマイクロ波レーダー装置とか
らなることを特徴とするマイクロ波レベル測定装
置。 ２ 前記誘電体測定窓の窓材料としてマイカ板を
使用する特許請求の範囲第１項記載のマイクロ波
レベル測定装置。[Claims] 1. A cylindrical measurement hole with a water cooling mechanism provided in the upper part of the high-temperature refining furnace, and a horizontally movable device having a dielectric measurement window provided at the upper end of the measurement hole so as to be gas-sealable. a measurement gate, a mechanism for gas purging downward from the upper end of the measurement hole, a mechanism for gas purging the lower surface of the dielectric window, and a microwave radar device provided above the measurement gate. A microwave level measuring device characterized by: 2. The microwave level measuring device according to claim 1, wherein a mica plate is used as the window material of the dielectric measurement window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61246824A JPS63100331A (en) | 1986-10-16 | 1986-10-16 | Microwave level measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61246824A JPS63100331A (en) | 1986-10-16 | 1986-10-16 | Microwave level measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63100331A JPS63100331A (en) | 1988-05-02 |
| JPH0481734B2 true JPH0481734B2 (en) | 1992-12-24 |
Family
ID=17154238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61246824A Granted JPS63100331A (en) | 1986-10-16 | 1986-10-16 | Microwave level measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63100331A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020050830A (en) * | 2000-12-22 | 2002-06-28 | 신현준 | Microwave level measurement apparatus and method for Blaster Furnace |
| SE0104062D0 (en) | 2001-12-05 | 2001-12-05 | Saab Marine Electronics | radar Antenna |
| KR100885228B1 (en) | 2004-11-08 | 2009-02-24 | 가부시기가이샤니레꼬 | Method and apparatus for measuring width direction end position of band-like body, and Method and apparatus for measuring width direction center position of band-shaped body |
| JP5267892B2 (en) * | 2010-11-19 | 2013-08-21 | 新日鐵住金株式会社 | Converter blowing method |
| JP6130234B2 (en) * | 2012-11-12 | 2017-05-17 | 株式会社Ｗａｄｅｃｏ | Surface detection device for blast furnace interior |
| JP6297258B2 (en) * | 2013-01-10 | 2018-03-20 | 新日鐵住金株式会社 | Microwave distance measuring device |
-
1986
- 1986-10-16 JP JP61246824A patent/JPS63100331A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63100331A (en) | 1988-05-02 |
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