JPH0221547B2 - - Google Patents
Info
- Publication number
- JPH0221547B2 JPH0221547B2 JP57025998A JP2599882A JPH0221547B2 JP H0221547 B2 JPH0221547 B2 JP H0221547B2 JP 57025998 A JP57025998 A JP 57025998A JP 2599882 A JP2599882 A JP 2599882A JP H0221547 B2 JPH0221547 B2 JP H0221547B2
- Authority
- JP
- Japan
- Prior art keywords
- hot metal
- gas
- partial pressure
- amount
- collected
- 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
- 239000002184 metal Substances 0.000 claims description 40
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 37
- 239000000523 sample Substances 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/202—Constituents thereof
- G01N33/2022—Non-metallic constituents
- G01N33/2025—Gaseous constituents
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
この発明は、高炉から出銑された溶銑中のSi量
を連続的にかつ迅速に分析する溶銑中のSi量の連
続分析法に関するものである。
溶銑中のSi量は、高炉の操作過程において、約
0.3％から約0.6％まで変動する。このような溶銑
中のSi量を迅速に分析し、その変動を把握するこ
とは、例えば溶銑の事前脱Si処理その他溶銑の精
錬を行なう上において極めて重要なことである。
従来、溶融金属の成分を迅速に分析する手段と
しては、例えばスパーク法、プラズマジエツト
法、GPレーザー法等が知られている。しかるに、
これらの方法は、何れも発光分光分析によるもの
であるため、発光に高エネルギーの出力を必要と
し、例えばGPレーザー法の場合には、出力が
50MWの高エネルギーを要するため、極めて経済
的でなく、実用には供されていない。
本発明者等は上述のような観点から、経済的に
溶銑中のSi量を連続的にかつ迅速に分析する溶銑
中のSi量の連続分析法を開発すべく鋭意研究を重
ねた。
溶銑中にはＣが飽和濃度まで含有されていて、
その酸素分圧Po2は、10-16〜10-14atmと低く、酸
素分圧がこの範囲の溶銑中には、SiOガスが存在
する。このSiOガスのガス分圧Psioは、Po2やSi
の濃度にもよるが、10-2〜10-8と考えられる。
本発明者等は、上述したことから、溶銑中に
Po2を制御した不活性ガスを吹込み、この不活性
ガスによつて溶銑中から排出されたSiOガスにつ
き、溶銑中のSiとPsioとの相関関係を調べたとこ
ろ、両者間には強い相関があることを知見した。
この発明は、上記知見に基づいてなされたもの
で、高炉から出銑し、溶銑樋を流れる溶銑中に、
予め脱酸して酸素分が制御された不活性ガスをプ
ローブを介して吹き込み、前記不活性ガスにより
溶銑中から排出されたガス中のSiOガスを分析し
てそのガス分圧または光反射強度から、溶銑中の
Si量を連続的に検知することに特徴を有するもの
である。
次に、この発明を実施例により図面と共に説明
する。
第１図には、この発明方法を実施するための試
験装置の一例が示されている。図面において１は
溶銑樋、２は溶銑樋１中を流れる溶銑である。３
はアルゴンガスが収容された容器、４は電気炉、
５はその開口５ａが溶銑樋１中を流れる溶銑２中
に浸漬された黒鉛製のガス吹込みプローブであ
る。
容器３内のアルゴンガスは、電気炉４内の導管
４Ａ中に導かれ約600℃に加熱されると共に、導
管４Ａ中の銅片６により脱酸してPo2が制御され
た上、ガス吹込みプローブ５によつて、その開口
５ａから溶銑樋１を流れる溶銑２中に吹込まれ
る。
この結果、溶銑２中から排出されたArとSiOと
の混合ガスは、ガス吹込みプローブ５のガス排出
口５ｂから排出され、この排出ガスは切換弁７を
経て導管８により質量分析計９へ送られ、そのガ
ス分圧Psioが分析される。
また、前記排出ガスは切換弁７の切替えにより
導管１０から分光器１１に送られて分光器１１内
のSiO2微粒子１２と反応させ、発光受光素子１
３、検出器１４、mVメータ１５により、光反射
強度出力Poが検出される。１６は分光器１１に
O2ガスを供給するO2ガス容器、１７は分光器１
１に設けられたO2ガスエジエクターである。
第２図には上述した試験装置により、下記第１
表に示す成分組成および温度（何れも平均値）の
溶銑のSi量を分析した結果が示されている。
The present invention relates to a continuous analysis method for the amount of Si in hot metal, which continuously and quickly analyzes the amount of Si in hot metal tapped from a blast furnace. The amount of Si in hot metal is approximately
It varies from 0.3% to approximately 0.6%. It is extremely important to quickly analyze the amount of Si in hot metal and understand its fluctuations, for example, in performing pre-Si removal treatment of hot metal and other refining of hot metal. Conventionally, methods for quickly analyzing the components of molten metal include, for example, a spark method, a plasma jet method, a GP laser method, and the like. However,
Since these methods all rely on emission spectroscopy, they require high-energy output for light emission; for example, in the case of the GP laser method, the output is low.
Since it requires high energy of 50 MW, it is extremely uneconomical and has not been put to practical use. From the above-mentioned viewpoint, the present inventors have conducted extensive research in order to develop a continuous analysis method for the amount of Si in hot metal that can economically and continuously analyze the amount of Si in hot metal. Hot metal contains carbon up to a saturation concentration,
The oxygen partial pressure Po 2 is as low as 10 -16 to 10 -14 atm, and SiO gas is present in hot metal with an oxygen partial pressure in this range. The gas partial pressure Psio of this SiO gas is
Although it depends on the concentration, it is thought to be between 10 -2 and 10 -8 . Based on the above, the present inventors discovered that
When we investigated the correlation between Si in the hot metal and Psio by injecting an inert gas with controlled Po 2 and examining the SiO gas discharged from the hot metal by this inert gas, we found a strong correlation between the two. I found out that there is. This invention was made based on the above knowledge, and in the hot metal that is tapped from the blast furnace and flows through the hot metal trough,
An inert gas whose oxygen content has been controlled by deoxidizing it in advance is blown in through a probe, and the SiO gas in the gas discharged from the hot metal is analyzed based on the gas partial pressure or light reflection intensity. , in hot metal
The feature is that the amount of Si is detected continuously. Next, the present invention will be explained with reference to examples and drawings. FIG. 1 shows an example of a test apparatus for carrying out the method of this invention. In the drawing, 1 is a hot metal sluice, and 2 is hot metal flowing through the molten metal sluice 1. 3
is a container containing argon gas, 4 is an electric furnace,
Reference numeral 5 designates a graphite gas blowing probe whose opening 5a is immersed in hot metal 2 flowing in hot metal trough 1. The argon gas in the container 3 is guided into the conduit 4A in the electric furnace 4 and heated to about 600°C, and is deoxidized by the copper piece 6 in the conduit 4A to control Po 2 and then gas blown. The hot metal 2 flowing through the hot metal trough 1 is blown into the hot metal 2 by the pouring probe 5 through its opening 5a. As a result, the mixed gas of Ar and SiO discharged from the hot metal 2 is discharged from the gas discharge port 5b of the gas injection probe 5, and this discharged gas passes through the switching valve 7 and enters the mass spectrometer 9 through the conduit 8. The gas partial pressure Psio is analyzed. Further, the exhaust gas is sent from the conduit 10 to the spectrometer 11 by switching the switching valve 7, and reacts with the SiO 2 fine particles 12 in the spectrometer 11, causing the light emitting and receiving element 1 to react.
3. The light reflection intensity output Po is detected by the detector 14 and the mV meter 15. 16 to spectrometer 11
O2 gas container that supplies O2 gas, 17 is spectrometer 1
This is an O 2 gas ejector installed in 1. Figure 2 shows the following test results using the test equipment described above.
The results of analyzing the amount of Si in hot metal with the composition and temperature (all average values) shown in the table are shown.
【表】
第２図は上記により質量分析計９で実測した
SiOガスのガス分圧Psioと、同じく分光器１１で
実測したSiOガスの光反射強度出力Poの、Si量と
の関係を示したもので、典線ＡはSsio、また典線
ＢはPoである。
図面からわかるように、ガス分圧Psioもまた光
反射強度出力Poも、Si量とは強い相関があり、
従つて、前記PsioまたはPoから、適確に溶銑中
のSi量を検出することができる。
以上述べたように、この発明によれば、溶銑中
に不活性ガスを導入し、前記不活性ガスにより溶
銑中から排出されたガス中のSiOガスを分析し
て、そのガス分圧または光反射強度を検出するこ
とにより、溶銑中のSi量を迅速かつ連続的に、し
かも経済的に適確に分析することができる工業上
優れた効果が示される。[Table] Figure 2 shows the actual measurement using mass spectrometer 9 as described above.
It shows the relationship between the gas partial pressure Psio of SiO gas and the amount of Si in the optical reflection intensity output Po of SiO gas, which was also measured using the spectrometer 11. Normative line A is Ssio, and normal line B is Po. be. As can be seen from the drawing, both the gas partial pressure Psio and the optical reflection intensity output Po have a strong correlation with the amount of Si.
Therefore, the amount of Si in the hot metal can be accurately detected from the Psio or Po. As described above, according to the present invention, an inert gas is introduced into hot metal, and the SiO gas in the gas discharged from the hot metal is analyzed to determine the gas partial pressure or optical reflection. By detecting the strength, the amount of Si in hot metal can be analyzed rapidly, continuously, and economically, which is an excellent industrial effect.
第１図はこの発明方法を実施するための試験装
置の一例を示す説明図、第２図はこの発明方法で
得られたPsioとPoの溶銑中Si量との関係を示す
図である。図面において、
１…溶銑樋、２…溶銑、３…アルゴンガス容
器、４…電気炉、５…ガス吹込みプローブ、５ａ
…開口、５ｂ…ガス排出口、６…銅片、７…切換
弁、８，１０…導管、９…質量分析計、１１…分
光器、１２…SiO2微粒子、１３…発光受光素子、
１４…検出器、１５…mVメータ、１６…O2ガス
容器、１７…O2ガスエジエクター。
FIG. 1 is an explanatory diagram showing an example of a test apparatus for carrying out the method of this invention, and FIG. 2 is a diagram showing the relationship between Psio obtained by the method of this invention and the amount of Si in the hot metal of Po. In the drawings, 1...Hot metal trough, 2...Hot metal, 3...Argon gas container, 4...Electric furnace, 5...Gas injection probe, 5a
...Opening, 5b...Gas exhaust port, 6...Copper piece, 7...Switching valve, 8, 10...Conduit, 9...Mass spectrometer, 11...Spectrometer, 12...SiO 2 fine particles, 13...Emitting light receiving element,
14...detector, 15...mV meter, 16... O2 gas container, 17... O2 gas ejector.
Claims (1)
予め脱酸して酸素分圧が制御された不活性ガスを
プローブを介して吹き込み、前記吹き込まれた不
活性ガスにより溶銑中から排出されたガスを、前
記プローブを介して捕集し、捕集したガスを質量
分析計に送つてそのガス分圧を分析し、または、
前記捕集したガスを分光器に送り、SiO2微粒子
と反応させて光反射強度を検出し、このようなガ
ス分圧または光反射強度から、溶銑樋を流れる溶
銑中のSi量を連続的に検知することを特徴とする
溶銑中Si量の連続分析法。1. In the hot metal that is tapped from the blast furnace and flows through the hot metal gutter,
Inert gas, which has been deoxidized in advance and whose oxygen partial pressure has been controlled, is blown through the probe, and the gas discharged from the hot metal by the blown inert gas is collected and collected through the probe. send the gas to a mass spectrometer to analyze the gas partial pressure, or
The collected gas is sent to a spectrometer, where it reacts with SiO 2 fine particles to detect the light reflection intensity, and from this gas partial pressure or light reflection intensity, the amount of Si in the hot metal flowing through the hot metal culvert is continuously calculated. A continuous analysis method for detecting the amount of Si in hot metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57025998A JPS58143266A (en) | 1982-02-22 | 1982-02-22 | Method for continuously analyzing silicon content in molten pig iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57025998A JPS58143266A (en) | 1982-02-22 | 1982-02-22 | Method for continuously analyzing silicon content in molten pig iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58143266A JPS58143266A (en) | 1983-08-25 |
| JPH0221547B2 true JPH0221547B2 (en) | 1990-05-15 |
Family
ID=12181383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57025998A Granted JPS58143266A (en) | 1982-02-22 | 1982-02-22 | Method for continuously analyzing silicon content in molten pig iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58143266A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61292055A (en) * | 1985-06-19 | 1986-12-22 | Nippon Kokan Kk <Nkk> | Quick analysis of molten steel |
| JPH0613492Y2 (en) * | 1985-10-11 | 1994-04-06 | 住友軽金属工業株式会社 | Probe for measuring hydrogen concentration in molten metal |
| JP2535896Y2 (en) * | 1991-01-16 | 1997-05-14 | コスモ工機株式会社 | Chip recovery device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1510957A (en) * | 1975-05-07 | 1978-05-17 | National research development corp investigation of the gas content of molten metals |
-
1982
- 1982-02-22 JP JP57025998A patent/JPS58143266A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1510957A (en) * | 1975-05-07 | 1978-05-17 | National research development corp investigation of the gas content of molten metals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58143266A (en) | 1983-08-25 |
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