CN1131743A - Electric furnace steel-smelting remote sensing analysis - Google Patents
Electric furnace steel-smelting remote sensing analysis Download PDFInfo
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- CN1131743A CN1131743A CN 95103106 CN95103106A CN1131743A CN 1131743 A CN1131743 A CN 1131743A CN 95103106 CN95103106 CN 95103106 CN 95103106 A CN95103106 A CN 95103106A CN 1131743 A CN1131743 A CN 1131743A
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Abstract
A remote-sensing analysis method for in-line determining several elements at same time during smelting steel in electric furnace features that an atomic emission spectrometer is installed at position 10 m away from electric fumace for avoiding interferences from vibration and dust, and its collimating mirror is aimed at the center of arc flame directly or via reflecting convergent lens. It can indicate in real-time the content of each component and the end of smelting steel.
Description
The invention discloses a kind of design of electric furnace steel-smelting remote sensing analysis, it belongs to metallurgical technology field.
The maximization of Iron and Steel Production, high speed and serialization require to obtain in time the measurement result of various elementary compositions in the molten steel.Speed, accuracy, the precision of off-line chemical examination and the number etc. of measuring element have not simultaneously satisfied the needs of Iron and Steel Production.In developed country because reasearch funds are relatively sufficient, science and technology is more advanced, between nearly more than ten years, paid huge manpower and materials research steel-making on-line analysis, promptly when smelting is carried out, at every moment can access the measurement result of molten steel multielement, thereby can instruct steelmaking process at any time, and when each element determination result is qualified, judge the terminal point of smelting exactly.At present, the following four kinds of modes of having of laboratory stage achievement have been obtained: 1. analyze the emission spectrum that molten steel produces.A) spark-discharge method.A tungsten electrode has been installed on the liquid metal top of vacuum melting furnace by Japan Kobe iron company, by spark discharge molten steel is excited in argon gas, with light transmitting fiber light is delivered to optical splitter again, analyze silicon in the iron and steel (ほ ガ, iron と steel online, 1985,71, A125).The major defect of this method is the ultraviolet region that wavelength is shorter than 260nm to be absorbed serious, has the element that important mensuration is worth so can not be used to analyze carbon, phosphorus, sulphur etc.B) also useful laser excitation molten steel send spectral line with the photoconduction transmitting fiber tow.Its shortcoming with a) described in identical.C) utilize near the high temperature of 2600 ℃ of oxygen blast kindling point to carry out the spectral analysis of manganese, also used light transmitting fiber to transmit spectral line.2. analyze the particulate that generates.A) utilize laser radiation in the molten steel surface, the growing amount that obtains particulate is 3mg/min, and the particulate of carrying these generations with argon gas is to the ICP emission spectrometer.B) directly in molten steel, lead to argon gas, the particulate that generates is delivered to the ICP emission spectrometer.C) spark-discharge method utilizes spark discharge to generate particulate, carries out the ICP spectral analysis then, and the shortcoming of this method is the equipment complexity, the defeated easy calm particulate of particulate pipeline.3. analyze the compound that generates, logical chlorine, oxygen etc. make the component in the molten steel generate chloride or oxide in molten steel, deliver to the ICP spectrometer again and analyze.The shortcoming of this method is that the element of measuring simultaneously is few, and the phase mutual interference between the multielement is bigger.4. analysis exhaust gas and dust.Utilize argon gas stream that the flue dust of electric furnace or converter is introduced the atomic absorption analysis device, the ratio of the absorbance of mensuration Mn/Fe and the relation between the manganese content.This method only limits to measure manganese in the molten steel at present.
In nineteen fifty-seven, begin attempt to adopt a kind of online and measure multiple element in the molten steel simultaneously.USSR (Union of Soviet Socialist Republics) once was installed in Atomic Emission Spectrometer AES near the electric furnace, and the light that molten steel in the electric furnace is sent has carried out emission spectrographic analysis, obtained accuracy owing to failing, data that precision is qualified are failed.The reason of failure is that spectrometer is too near from electric furnace, and the environment of dust and vibrations is unsuitable for carrying out assay determination work.
In sum, also there is not a kind of method under the prerequisite that satisfies accuracy, precision, can side by side carry out the on-line analysis of multielement in the molten steel.[Gao Hong chief editor, " analytical chemistry forward position ", Science Press, 1991, the 319 pages; " metallurgical analysis ", 1994,14 (2): 35; " metallurgical analysis ", 1992,12 (1): 33)]
The objective of the invention is to design a kind of remote sensing analysis method that can measure multiple element in the EAF Steelmaking Process simultaneously, it promptly can indicate the various components contents of molten steel in the steelmaking process in real time, to instruct whole steelmaking process, and the terminal point of indication steel-making in time, save the duration of heat, thereby improve the output and the quality of steel.
For realizing the present invention, the technical measures of being taked are: the present invention is a kind of improvement to electric furnace direct sunshine analysis of spectrum, its main points are to be, the Atomic Emission Spectrometer AES of taking the photograph spectrum usefulness is installed in apart from the distant position of steel-smelting electric furnace (beyond 10 meters), thereby can avoids shaking interference with dust fully.Principle with the spectral line of measuring liftoff ball tens light-year celestial bodies on the uranology is identical, the quasi-optical mirror of Atomic Emission Spectrometer AES is aimed at electric arc arc flame center in (or by reflecting condenser lens aligning) electric furnace.Each composition in the molten steel can both be excited in the electric arc arc flame, is used for quantitative test thereby launch characteristic spectral line.
The present invention also can be applicable to the online remote sensing analysis of other electric furnace smelting.
With existing on-the-spot sample analysis technology, comprise that studying still unenforced technical scheme compares, the present invention has the advantage of following several respects:
1. design proposal is simple, and small investment is easy to development and enforcement.In development and implementation process, steelmaking process is disturbed minimum.
2. sampling quantity is big, thus the accuracy height.
3. the quantity that can carry out in the molten steel element measured simultaneously is maximum, except the element identical with electrode, all elements on principle in the molten steel can be measured, so just reduced or remitted because the method error between the analytical approach that various elements institute uses respectively makes the accuracy of mensuration increase again from this one side.
4. realized on-line analysis by the remote sensing means, realized effective control, thereby improved the quality of steel the steel-making overall process.Because the element that can measure simultaneously is maximum, further save the time of stokehold chemical examination, thereby improved the output of steel, reduced steel-making cost.
Accompanying drawing of the present invention and drawing are described as follows:
Fig. 1 is an electric furnace steel-smelting remote sensing analysis test synoptic diagram, and wherein 1 is electric furnace body; The 2nd, electrode is used in steel-making, also is the excitation source electrode that analytical test is used; The 3rd, arc flame; The 4th, molten steel; The 5th, peep-hole also is to take the photograph the light hole that spectrum is used up; The 6th, be used for the light of remote sensing analysis; The 7th, matrix light gathering reflector, the effect that is used to adjust the angle of incident ray and plays optically focused; The 8th, spectrometer; The 9th, computing machine; The 10th, record output result's instrument; The 11st, shielded conduit; The 12nd, the laboratory; The 13rd, the power supply that electric furnace smelting is used also is an excitation power source of taking the photograph spectrum usefulness; 14 expression ground connection.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, the part light (6) that shoots out from arc flame (3) arrives spectrograph (8) through peep-hole (5) through light gathering reflector (7), thereby measures when carrying out multielement.Light (6) moves in shielded conduit (11), can overcome the interference of dust to measuring like this, avoids oxygen, aqueous vapor, to the absorption of spectrums such as phosphorus, oxygen, carbon, and the cleaning of protection mirror surface.Fill in the shielded conduit with suitable gas, as nitrogen, argon gas etc.
Claims (2)
1. electric furnace steel-smelting remote sensing analysis that utilizes Atomic Emission Spectrometer AES, it is characterized in that: the position in distance electric furnace 〉=10 meter, the Atomic Emission Spectrometer AES of spectrum usefulness is taken the photograph in placement, and the quasi-optical mirror of Atomic Emission Spectrometer AES is aimed at electric arc arc flame center in (or by reflecting condenser lens aligning) electric furnace; Arrive spectrograph (8) through peep-hole (5) through condenser (7) from the light (6) of arc flame (3) emission; Light (6) moves in shielded conduit (11), is filled with suitable gas such as nitrogen or argon in the shielded conduit.
2. by the described electric furnace steel-smelting remote sensing analysis of claim 1, it is characterized in that: the electric smelting process that also can be used for other metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103106 CN1131743A (en) | 1995-03-17 | 1995-03-17 | Electric furnace steel-smelting remote sensing analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103106 CN1131743A (en) | 1995-03-17 | 1995-03-17 | Electric furnace steel-smelting remote sensing analysis |
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| CN1131743A true CN1131743A (en) | 1996-09-25 |
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| CN 95103106 Pending CN1131743A (en) | 1995-03-17 | 1995-03-17 | Electric furnace steel-smelting remote sensing analysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107243620A (en) * | 2017-06-22 | 2017-10-13 | 霍山县忠福机电科技有限公司 | A kind of wind-driven generator group wheel box high-pressure casting method |
-
1995
- 1995-03-17 CN CN 95103106 patent/CN1131743A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107243620A (en) * | 2017-06-22 | 2017-10-13 | 霍山县忠福机电科技有限公司 | A kind of wind-driven generator group wheel box high-pressure casting method |
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