JPH07233407A - Method for measuring pressure and instrument therefor - Google Patents
Method for measuring pressure and instrument thereforInfo
- Publication number
- JPH07233407A JPH07233407A JP2434294A JP2434294A JPH07233407A JP H07233407 A JPH07233407 A JP H07233407A JP 2434294 A JP2434294 A JP 2434294A JP 2434294 A JP2434294 A JP 2434294A JP H07233407 A JPH07233407 A JP H07233407A
- Authority
- JP
- Japan
- Prior art keywords
- brick
- detection port
- pressure
- detecting hole
- blast furnace
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000011449 brick Substances 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 37
- 239000011819 refractory material Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010926 purge Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 4
- 239000007789 gas Substances 0.000 abstract 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract 2
- 239000011823 monolithic refractory Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Blast Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高炉など高温粉塵環境
下に置かれる容器内の圧力の測定方法及び装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for measuring pressure in a container placed in a high temperature dust environment such as a blast furnace.
【０００２】[0002]
【従来技術】高温粉塵環境下に置かれる容器内の圧力測
定が行われる分野の一つに高炉がある。高炉では操業因
子の一つとして、高炉に装入された原料やコークス等か
らのガスの抜け具合を欠るため、高炉シャフト部に中空
若しくはガラスウールを充填した検出口を高炉シャフト
部に取付け、検出口内部をＮ2 ガスでパージしながら検
出口内部の圧力測定を行い、この測定値を検出口内で生
じた圧力損失を考慮して補正することにより高炉内圧力
を求めていた。2. Description of the Related Art A blast furnace is one of the fields in which pressure measurement in a container placed in a high temperature dust environment is performed. As one of the operating factors in the blast furnace, since there is no escape of gas from the raw materials or coke charged into the blast furnace, a hollow or glass wool-filled detection port is attached to the blast furnace shaft, The pressure inside the detection port was measured while purging the inside of the detection port with N 2 gas, and the pressure inside the blast furnace was determined by correcting this measured value in consideration of the pressure loss generated in the detection port.
【０００３】[0003]
【発明が解決しようとする課題】上述する従来法におい
て、高炉内の圧力測定のため、検出口に中空のものを用
いた場合、検出口にダストや地金等が付着して目詰まり
を起こし、その結果、正常な測定が行えなくなって、高
炉の休風時に検出口の清掃が必要となり、目詰まりを除
去せねばならなかった。In the above-mentioned conventional method, when a hollow detection port is used for pressure measurement in the blast furnace, dust or metal is attached to the detection port and clogging occurs. As a result, normal measurement could not be performed, and the detection port had to be cleaned when the blast furnace was off, and clogging had to be removed.
【０００４】また、検出口にガラスウールを充填したも
のを用いた場合も、パージしたＮ2ガスによりガラスウ
ールが炉内に抜け出てしまい、中空の検出口と同じ状態
になりがちであった。本発明は、上記の問題を解消する
ことを目的としてなされたものである。Also, when the detection port filled with glass wool was used, the purged N 2 gas tended to cause the glass wool to escape into the furnace, resulting in the same state as the hollow detection port. The present invention has been made for the purpose of solving the above problems.
【０００５】[0005]
【課題の解決手段及び作用】本発明はそのため、高温粉
塵環境下に置かれる容器に、ガス通気性の多孔質耐火物
よりなる検出口を設け、検出口を通してパージされるガ
スの圧力測定を行ったのち、この測定値を検出口内部で
生じた圧力損失で補正して、容器内の圧力を測定できる
ようにしたものである。Therefore, according to the present invention, a container placed in a high temperature dust environment is provided with a detection port made of a gas-permeable porous refractory, and the pressure of the gas purged through the detection port is measured. After that, this measured value is corrected by the pressure loss generated inside the detection port so that the pressure inside the container can be measured.
【０００６】本方法によれば、多孔質耐火物によりガス
パージの機能を損なうことなく、検出口からのダストの
洩出を防ぐことができ、耐火物の熱膨張係数が小さいた
め、熱による膨張割れも防ぐことができる。また高炉の
場合では、耐火物への地金の付着が生じにくゝ、目詰ま
りを生じにくい。本方法を実施するための装置は、容器
に設けられる検出口を筒状とし、内部にガス通気性の多
孔質耐火物を充填してなるものである。According to this method, it is possible to prevent dust from leaking from the detection port without impairing the gas purging function by the porous refractory material, and the thermal expansion coefficient of the refractory material is small. Can also be prevented. Also, in the case of a blast furnace, the metal is unlikely to adhere to the refractory material and clogging is less likely to occur. An apparatus for carrying out the present method has a cylindrical detection port provided in a container and is filled with a gas-permeable porous refractory material.
【０００７】本発明方法及び装置で用いられる多孔質耐
火物は、見掛気孔率が好ましくは１８〜３０％、より好
ましくは２２〜２６％のものである。上述の多孔質耐火
物はまた、定形の煉瓦よりなるものが望ましく、検出口
に数個充填される。発泡性の不定形耐火物を流し込んで
成形するよりも、施工が容易かつ簡単で、短時間ででき
るようになるからである。施工を容易にするためには、
検出口に軸方向に一定間隔の円周上にビス、ボルト等の
止め具を取付けて検出口内に突出させ、煉瓦の端面周縁
に環状の切欠きを形成して、止め具の突出端が切欠きに
当たることで煉瓦の位置決めを行わせるようにするのが
望ましい。すなわち、煉瓦を検出口内に切欠きが止め具
の突出部分に当たるまで押し込むことによって煉瓦の位
置を一定に保たせるようにするのである。The porous refractory used in the method and apparatus of the present invention preferably has an apparent porosity of 18 to 30%, more preferably 22 to 26%. The above-mentioned porous refractory material is also preferably made of a fixed-sized brick, and a plurality of detection openings are filled. This is because the construction is easier and simpler and can be done in a shorter time than when the foamable amorphous refractory is poured and molded. To facilitate the construction,
Attach stoppers such as screws and bolts to the detection opening along the circumference at regular intervals in the axial direction so that they project into the detection opening and form an annular notch on the peripheral edge of the brick, and the protruding end of the stopper is cut. It is desirable to position the brick by hitting the notch. That is, by pushing the brick into the detection opening until the notch hits the protruding portion of the stopper, the position of the brick is kept constant.
【０００８】煉瓦を使用する場合にはまた、シール性を
向上させるため、検出口と煉瓦との間にキャスタブルを
充填するのが望ましい。When using bricks, it is desirable to fill castable space between the detection opening and the bricks in order to improve the sealing property.
【０００９】[0009]
【実施例】図１は、図２の高炉シャフト部１に取付けら
れる検出口２の詳細を示すものであり、図３はその断面
を示すもので、パイプ３を連結した円筒状の検出口２
は、高炉の鉄皮４より突出する端部がフランジ５におい
て取外可能であり、内部に図４に示すように、円形断面
をなす高アルミナ質のガス通気性多孔質煉瓦６が数個押
し込められるようになっている。この煉瓦６は、両端面
の周縁にそれぞれ切欠き７を形成し、煉瓦６を検出口内
に押し込むときには、検出口２に軸方向に一定間隔をな
す各円周上にそれぞれ４カ所づゝ取付けたビス８の突出
端に係合させ、これにより煉瓦６の位置決めを行い、か
つ両煉瓦６の切欠き７でビス８を挟み込んで煉瓦同志を
突き合わせ、密着させるようになっている。図中、９は
煉瓦６を装填後、検出口２と煉瓦６との間に流し込まれ
る無機系のキャスタブルであり、１１は、検出内にパー
ジされるＮ2 ガスの圧力を検出するための圧力計であ
る。また、図２における１２は羽口、１３は断熱キャス
ター、１４は耐火レンガを示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the details of the detection port 2 attached to the blast furnace shaft portion 1 of FIG. 2, and FIG. 3 shows its cross section, which is a cylindrical detection port 2 to which a pipe 3 is connected.
The end of the blast furnace projecting from the iron shell 4 is removable at the flange 5, and several high alumina gas permeable porous bricks 6 having a circular cross section are pushed into the inside as shown in FIG. It is designed to be used. This brick 6 has notches 7 formed at the peripheral edges of both end faces, and when the brick 6 is pushed into the detection opening, it is attached to the detection opening 2 at four places on each circumference at a constant interval in the axial direction. The projecting ends of the screws 8 are engaged with each other to position the bricks 6, and the notches 7 of both the bricks 6 sandwich the screws 8 so that the bricks are brought into close contact with each other. In the figure, 9 is an inorganic castable that is poured between the detection port 2 and the brick 6 after the brick 6 is loaded, and 11 is a pressure for detecting the pressure of N 2 gas purged in the detection. It is total. 2, 12 is a tuyere, 13 is a heat insulating caster, and 14 is a refractory brick.
【００１０】本実施例で用いた煉瓦の組成及び物性は次
の通りである。 組成 Ａｌ2 Ｏ3 ９６．９％ ＳｉＯ2 ２．７％ Ｆｅ2 Ｏ3 ０．４％ 物性 見掛気孔率 ２６％ 嵩比重 ２．７９ 見掛比重 ３．７７ 圧縮強さ ９００kg／cm2 通気率 １．２ cm2／sec cmH2o 通気量（注１） ３００〜４００ｌ／min 耐ポール性（１４００°空冷） ＞ ２０回 注１ 口径６６mmφ、１．５kg／cm3 での数値 また、キャスタブル組成及び物性は次の通りである。The composition and physical properties of the brick used in this example are as follows. Composition Al 2 O 3 96.9% SiO 2 2.7% Fe 2 O 3 0.4% Physical properties Apparent porosity 26% Bulk specific gravity 2.79 Apparent specific gravity 3.77 Compressive strength 900 kg / cm 2 Permeability 1.2 cm 2 / sec cmH 2 o Ventilation rate (Note 1) 300 to 400 l / min Pole resistance (1400 ° air cooling)> 20 times Note 1 Numerical value at 66 mmφ, 1.5 kg / cm 3 Castable composition And the physical properties are as follows.
【００１１】組成 ＳｉＯ2 ５．７％ Ａｌ2 Ｏ3 ９０．８％ Ｆｅ2 Ｏ3 ０．５％ ＴｉＯ2 １．５％ ＣａＯ ０．６％ 物性 見掛気孔率（注２） １１．５％ 嵩比重 ２．９０ 見掛比重 ３．２８ 圧縮強さ ４１０kg／cm2 Composition SiO 2 5.7% Al 2 O 3 90.8% Fe 2 O 3 0.5% TiO 2 1.5% CaO 0.6% Physical properties Apparent porosity (Note 2) 11.5% Bulk specific gravity 2.90 Apparent specific gravity 3.28 Compressive strength 410kg / cm 2
【００１２】[0012]
【発明の効果】本発明は以上のように構成され、次のよ
うな効果を奏する。請求項１記載の方法及び請求項２記
載の装置によれば、ガスパージによる圧力測定の機能を
損なうことなく、また熱による膨張割れを生ずることな
く、検出口からのダストの洩出を防ぐことができ、高炉
に適用した場合には、地金の付着による目詰まりも生じ
にくい。The present invention is constructed as described above and has the following effects. According to the method described in claim 1 and the device described in claim 2, it is possible to prevent dust from leaking from the detection port without impairing the pressure measurement function by gas purging and without causing expansion cracking due to heat. When applied to a blast furnace, clogging due to adhesion of metal is unlikely to occur.
【００１３】請求項３記載の装置のように、耐火物とし
て煉瓦を用いれば、検出口の施工が容易かつ簡単で、短
時間でできるようになる。請求項４記載の装置において
は、検出口内に煉瓦を押し込むときの位置決めが容易と
なり、施工がより一層容易となる。請求項５記載の装置
においては、検出口のシール性を向上させることができ
る。When a brick is used as the refractory material as in the apparatus according to the third aspect, the detection port can be constructed easily and easily and in a short time. In the device according to the fourth aspect, the positioning when pushing the brick into the detection opening becomes easy, and the construction becomes even easier. In the device according to the fifth aspect, the sealing property of the detection port can be improved.
【図１】 検出口の縦断面図。FIG. 1 is a vertical sectional view of a detection port.
【図２】 高炉シャフト部の概略図。FIG. 2 is a schematic view of a blast furnace shaft portion.
【図３】 図１のＡ−Ａ線断面図。FIG. 3 is a sectional view taken along line AA of FIG.
【図４】 煉瓦の斜視図。FIG. 4 is a perspective view of a brick.
１・・・高炉シャフト部 ２・・検出口 ３・・パイプ ６・・・煉瓦 ７・・・切欠き ８・・・ビス ９・・・キャスタブル １１・・・圧力計 １２・・・羽口 １３・・・断熱キ
ャスター １４・・・耐火煉瓦1 ... Blast furnace shaft 2 ... Detection port 3 ... Pipe 6 ... Brick 7 ... Notch 8 ... Screw 9 ... Castable 11 ... Pressure gauge 12 ... Tuyere 13 ... Insulation casters 14 ... Fireproof bricks
Claims (5)
通気性の多孔質耐火物よりなる検出口を設け、検出口を
通してパージされるガスの圧力測定を行ったのち、この
測定値を検出口内部で生じた圧力損失で補正して、容器
内の圧力を測定できるようにしたことを特徴とする圧力
の測定方法。1. A container placed in a high temperature dust environment is provided with a detection port made of a gas-permeable porous refractory, and the pressure of the gas purged through the detection port is measured, and then this measurement value is detected. A pressure measuring method characterized in that the pressure inside the container can be measured by compensating for the pressure loss generated inside the mouth.
おいて、容器に設けられる検出口を筒状とし、内部にガ
ス通気性の多孔質耐火物を充填したことを特徴とする。2. The apparatus used in the method according to claim 1, characterized in that the detection port provided in the container has a cylindrical shape, and a gas-permeable porous refractory is filled inside.
載の装置。3. The apparatus according to claim 2, wherein the refractory material is a brick of a fixed shape.
に止め具が先端を検出口内に突出して取付けられる一
方、煉瓦の端面周縁には、止め具突出端が嵌合する環状
の切欠きが形成される請求項３記載の装置。4. The detection port is provided with stoppers on the circumference of a circle at a constant interval in the axial direction with its tip projecting into the detection port. 4. The device of claim 3, wherein the notch is formed.
充填される請求項３記載の装置。5. The device according to claim 3, wherein a castable is filled between the brick and the detection port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2434294A JPH07233407A (en) | 1994-02-22 | 1994-02-22 | Method for measuring pressure and instrument therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2434294A JPH07233407A (en) | 1994-02-22 | 1994-02-22 | Method for measuring pressure and instrument therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07233407A true JPH07233407A (en) | 1995-09-05 |
Family
ID=12135518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2434294A Withdrawn JPH07233407A (en) | 1994-02-22 | 1994-02-22 | Method for measuring pressure and instrument therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07233407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100431603B1 (en) * | 2002-08-16 | 2004-05-17 | 주식회사 포스코 | Apparatus for preventing gas from being leaked from the bottom part of blast furnace |
| KR100433343B1 (en) * | 2000-11-10 | 2004-05-27 | 주식회사 포스코 | pressure detector brick and detection apparator utilize this in Blast Furnace true form |
| KR100499663B1 (en) * | 2000-05-31 | 2005-07-07 | 주식회사 포스코 | Pressure detection apparatus of blast furnace |
-
1994
- 1994-02-22 JP JP2434294A patent/JPH07233407A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100499663B1 (en) * | 2000-05-31 | 2005-07-07 | 주식회사 포스코 | Pressure detection apparatus of blast furnace |
| KR100433343B1 (en) * | 2000-11-10 | 2004-05-27 | 주식회사 포스코 | pressure detector brick and detection apparator utilize this in Blast Furnace true form |
| KR100431603B1 (en) * | 2002-08-16 | 2004-05-17 | 주식회사 포스코 | Apparatus for preventing gas from being leaked from the bottom part of blast furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010508 |