FR2688801A1 - Dust-removal device for the analysis of fumes and process for making use of such a device - Google Patents

Dust-removal device for the analysis of fumes and process for making use of such a device Download PDF

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Publication number
FR2688801A1
FR2688801A1 FR9203301A FR9203301A FR2688801A1 FR 2688801 A1 FR2688801 A1 FR 2688801A1 FR 9203301 A FR9203301 A FR 9203301A FR 9203301 A FR9203301 A FR 9203301A FR 2688801 A1 FR2688801 A1 FR 2688801A1
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France
Prior art keywords
corrugated tube
transfer line
analysis
fumes
gas
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Granted
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FR9203301A
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French (fr)
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FR2688801B1 (en
Inventor
Perrin Nicolas
Vuillermoz Jean-Claude
Daudin Benoit
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Air Liquide SA
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Air Liquide SA
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Priority to FR9203301A priority Critical patent/FR2688801B1/en
Publication of FR2688801A1 publication Critical patent/FR2688801A1/en
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Publication of FR2688801B1 publication Critical patent/FR2688801B1/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
    • F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2208—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with impactors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • G01N2001/227—Sampling from a flowing stream of gas separating gas from solid, e.g. filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The transfer and treatment line (8) between the fume-sampling probe (7) and an analysis system (9) comprises at least one upstream section (17) consisting of a corrugated, advantageously flexible, metal pipe connected to the upstream part (15) of the transfer line (8). The dust carried by the sampled gas is deposited in the corrugations of the corrugated pipe. To remove it, a gas under pressure (20) is passed countercurrentwise through the corrugated pipe. Application especially to devices for the analysis of fumes from electrical furnaces for steel production with the injection of oxygen-containing gas.

Description

La présente invention concerne les dispositifs d'analyse de fumées, notamment dans un conduit d'évacuation de fumées de réacteur industriel, comprenant une canne de prélèvement, au moins un système d'analyse, et une ligne de transfert de gaz entre la canne de prélèvement et le système d'analyse. The present invention relates to smoke analysis devices, in particular in an industrial reactor smoke evacuation pipe, comprising a sampling rod, at least one analysis system, and a gas transfer line between the combustion rod sampling and analysis system.

Un dispositif de ce type est décrit dans le document
GB-A-1.370.658 et dans la demande de brevet européen 92.400051.6, du 9 janvier 1992, au nom de la Demanderesse. Les dispositifs d'analyse de fumées trouvent une application particulièrement importante dans la régulation en continu de l'injection d'oxygène de post-combustion dans des fours électriques de production d'aciers ou de ferro-alliages. Un aspect primordial de la fiabilité de tels dispositifs réside dans la résistance au bouchage par les poussières charriées par les fumées. En effet, dans les applications ci-dessus, les fumées prélevées sont extrêmement chargées en poussières métalliques, avec des taux atteignant 250 g/Nm3, ainsi qu'en eau (jusqu'à 20 %), ce qui peut entraîner un bouchage du dispositif de transfert et de traitement, notamment un colmatage rapide des filtres disposés dans la ligne de transfert.A device of this type is described in the document
GB-A-1,370,658 and in European patent application 92.400051.6, of January 9, 1992, in the name of the Applicant. Smoke analysis devices find a particularly important application in the continuous regulation of the injection of post-combustion oxygen into electric furnaces for the production of steels or ferro-alloys. A key aspect of the reliability of such devices lies in the resistance to clogging by dust carried by the fumes. In fact, in the above applications, the sampled fumes are extremely charged with metallic dust, with rates reaching 250 g / Nm3, as well as with water (up to 20%), which can lead to blockage of the device. transfer and treatment, including rapid clogging of the filters arranged in the transfer line.

La présente invention a pour objet de proposer un dispositif d'analyse de fumées de conception particulièrement simple, robuste, de faibles coûts de fabrication, permettant de réduire notablement les quantités de poussières atteignant la partie aval de la ligne de transfert. The object of the present invention is to propose a smoke analysis device of particularly simple, robust design, with low manufacturing costs, making it possible to significantly reduce the quantities of dust reaching the downstream part of the transfer line.

Pour ce faire, selon une caractéristique de l'invention, la ligne de transfert comporte au moins un tronçon amont constitué d'un tube métallique, avantageusement flexible, présentant des ondulations. To do this, according to a characteristic of the invention, the transfer line comprises at least one upstream section consisting of a metal tube, advantageously flexible, having corrugations.

Selon une autre caractéristique de l'invention, la ligne de transfert comporte, en aval du tronçon, un moyen d'introduction à contre-courant d'un courant de gaz d'évacuation. According to another characteristic of the invention, the transfer line comprises, downstream of the section, a means of countercurrently introducing a stream of exhaust gas.

Avec un tel agencement, le tube ondulé favorise, en amont, la décantation des poussières et leur accumulation dans ses alvéoles, en réduisant ainsi les quantités de poussières atteignant la partie aval du dispositif. With such an arrangement, the corrugated tube promotes, upstream, the settling of dust and its accumulation in its cells, thereby reducing the amounts of dust reaching the downstream part of the device.

La présente invention a pour autre objet de proposer un procédé de mise en oeuvre d'un tel dispositif dans lequel, après une période d'usage déterminée, on fait passer le gaz d'évacuation à contre-courant dans le tube ondulé, après avoir éventuellement déconnecté l'extrémité amont du tube ondulé de la partie amont de la ligne de transfert. Another object of the present invention is to propose a method for implementing such a device in which, after a determined period of use, the exhaust gas is passed against the current in the corrugated tube, after having possibly disconnected the upstream end of the corrugated tube from the upstream part of the transfer line.

De cette façon, les poussières accumulées dans le tube ondulé sont aisément et rapidement évacuées sans nécessiter de changement d'une partie constitutive de la ligne de transfert, comme c'est le cas avec les filtres. In this way, the dust accumulated in the corrugated tube is easily and quickly evacuated without requiring a change of a constituent part of the transfer line, as is the case with the filters.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation, donnée à titre illustratif mais nullement limitatif, faite en relation avec les dessins annexés, sur lesquels
- la figure 1 est une vue schématique d'une installation de production d'acier à four à arc électrique comprenant un dispositif d'analyse de fumées selon l'invention ; et
- la figure 2 est une vue schématique, en section longitudinale, d'un mode de réalisation d'un tube ondulé selon l'invention.Other characteristics and advantages of the present invention will emerge from the following description of embodiments, given by way of illustration but in no way limiting, made in relation to the appended drawings, in which
- Figure 1 is a schematic view of a steel arc furnace production installation comprising a smoke analysis device according to the invention; and
- Figure 2 is a schematic view, in longitudinal section, of an embodiment of a corrugated tube according to the invention.

On a représenté sur la figure 1 un four à arc électrique 1 dont la voûte 2 porte des électrodes 3 et est raccordée à un conduit 4 d'évacuation des fumées. Le four 1 comporte par exemple au moins un brûleur oxy- combustible 5 et au moins une lance 6 d'injection d'oxygène ou d'un gaz fortement oxygéné. FIG. 1 shows an electric arc furnace 1, the roof 2 of which carries electrodes 3 and is connected to a pipe 4 for discharging the fumes. The oven 1 comprises for example at least one oxy-fuel burner 5 and at least one lance 6 for injecting oxygen or a highly oxygenated gas.

Le dispositif d'analyse des fumées évacuées par le conduit 4 comporte une canne 7 de prélèvement des fumées s'étendant dans le conduit 4 et reliée, par une ligne de transfert de gaz 8, à au moins un système 9 d'analyse de la teneur en monoxyde de carbone et/ou en hydrogène dans les fumées. La ligne 8 comporte, dans sa partie aval, au moins un dispositif de dessiccation et/ou de dépoussiérage 10 et une pompe 11 d'aspiration des fumées par la canne 7 qui peut être du type décrit dans la demande de brevet européen 92.400051.6 susmentionnée, dont le contenu est supposé intégré ici pour référence. The device for analyzing the fumes discharged through the conduit 4 comprises a cane 7 for withdrawing the fumes extending in the conduit 4 and connected, by a gas transfer line 8, to at least one system 9 for analyzing the carbon monoxide and / or hydrogen content in the fumes. Line 8 comprises, in its downstream part, at least one desiccation and / or dedusting device 10 and a pump 11 for sucking smoke from the cane 7 which may be of the type described in European patent application 92.400051.6 above, the content of which is assumed to be incorporated here for reference.

Le système d'analyse 9 fournit des signaux de mesure à une unité centrale de commande 12 pilotant notamment une électrovanne 13 interposée dans un conduit reliant la lance 6 à une source d'oxygène 14 pour moduler les quantités d'oxygène injectées dans le four 1 en fonction des caractéristiques de combustion mesurées par le système d'analyse 9.  The analysis system 9 provides measurement signals to a central control unit 12 controlling in particular a solenoid valve 13 interposed in a conduit connecting the lance 6 to an oxygen source 14 to modulate the quantities of oxygen injected into the furnace 1 as a function of the combustion characteristics measured by the analysis system 9.

Selon 1' invention, la ligne 8 comporte une portion d'extrémité amont 15 en acier inoxydable s'étendant depuis la canne 7, et reliée, par un raccord rapide 16, à l'extrémité d'un tronçon de tube ondulé 17 dont l'extrémité aval est reliée par un raccord 18 à la partie aval de la ligne 8, réalisée par exemple en cuivre. En aval du raccord 18 et en amont d'une vanne d'arrêt 19 dans la ligne 8, débouche dans cette ligne 8 une ligne 20 d'introduction d'un gaz comprimé, typiquement de l'air, via une valve d'arrêt 21. According to the invention, the line 8 comprises an upstream end portion 15 made of stainless steel extending from the rod 7, and connected, by a quick coupling 16, to the end of a section of corrugated tube 17 whose l he downstream end is connected by a fitting 18 to the downstream part of the line 8, made for example of copper. Downstream of the fitting 18 and upstream of a stop valve 19 in the line 8, there opens into this line 8 a line 20 for introducing a compressed gas, typically air, via a stop valve 21.

Comme on le voit mieux sur la figure 2, le tronçon 17 est constitué d'un tube flexible en acier inoxydable 22 avantageusement gainé d'une tresse métallique 23 assurant son élasticité et sa tenue en pression. Le tube 22 comporte des ondulations 24 formant, dans le mode de réalisation représenté, des alvéoles à section sensiblement circulaire et, pour une ligne 8 d'un diamètre nominal de 20 mm, présente un diamètre interne D de 15 mm, avec un pas d'ondulation 1 de 3,3 mm et une hauteur d'ondulation h de 2 mm. Le tronçon 17 a une longueur supérieure à 1 m, typiquement d'environ 2 m. Par "tube ondulé" au sens de la présente invention, on entend un tube comportant des ondulations formant des alvéoles non seulement circulaires, comme représenté sur la figure 2, mais également tout type d'alvéoles, à profil triangulaire, carré, ou trapézoidal. Selon les applications, le diamètre interne D est typiquement compris entre 6 et 100 mm, le rapport /h entre 0,2 et 3 et le rapport D/1 entre 0,5 et 10. En utilisation, et en raison des turbulences créées dans le tronçon 17, les poussières charriées par le gaz prélevé se déposent, comme figuré en 25, dans les alvéoles 24 qui retiennent ainsi une part substantielle des poussières prélevées qui n'atteignent donc pas la partie aval de la ligne de transfert. Le tronçon 17 est avantageusement orienté sensiblement horizontalement ou avec une légère pente, le raccord 16 étant alors plus bas que le raccord 18. As best seen in Figure 2, the section 17 consists of a flexible stainless steel tube 22 advantageously sheathed with a metal braid 23 ensuring its elasticity and its resistance to pressure. The tube 22 has corrugations 24 forming, in the embodiment shown, cells with a substantially circular section and, for a line 8 with a nominal diameter of 20 mm, has an internal diameter D of 15 mm, with a pitch d corrugation 1 of 3.3 mm and a corrugation height h of 2 mm. The section 17 has a length greater than 1 m, typically about 2 m. By "corrugated tube" in the sense of the present invention, is meant a tube comprising corrugations forming not only circular cells, as shown in FIG. 2, but also any type of cells, with triangular, square or trapezoidal profile. Depending on the applications, the internal diameter D is typically between 6 and 100 mm, the ratio / h between 0.2 and 3 and the ratio D / 1 between 0.5 and 10. In use, and due to the turbulence created in the section 17, the dust carried by the sampled gas is deposited, as shown in 25, in the cells 24 which thus retain a substantial part of the sampled dust which therefore does not reach the downstream part of the transfer line. The section 17 is advantageously oriented substantially horizontally or with a slight slope, the connector 16 then being lower than the connector 18.

Selon un aspect de l'invention, régulièrement, après un temps d'utilisation déterminé, lors d'une phase de repos de l'installation, on ferme la vanne 19 et on ouvre la vanne 21 pour balayer le tronçon 17 à contre-courant par le gaz comprimé dans la ligne 20 pour évacuer les poussières 25 accumulées dans les alvéoles 24, après avoir avantageusement déconnecté le raccord rapide 16 pour dégager l'extrémité amont du tronçon 17 du tronçon 15,. Pour faciliter cette évacuation, simultanément au passage du courant de gaz d'évacuation on imprime au tronçon flexible 17 des saccades périodiques par exemple en inclinant le tronçon 17 vers le bas. Après nettoyage, le tronçon 17 est de nouveau raccordé au tronçon 15 pour d'autres phases de prélèvement et d'analyse. According to one aspect of the invention, regularly, after a determined usage time, during a rest phase of the installation, the valve 19 is closed and the valve 21 is opened to sweep the section 17 against the current. by the compressed gas in the line 20 to evacuate the dust 25 accumulated in the cells 24, after having advantageously disconnected the quick connector 16 to release the upstream end of the section 17 of the section 15,. To facilitate this evacuation, simultaneously with the passage of the exhaust gas stream, the flexible section 17 is printed with periodic jerks, for example by tilting the section 17 downwards. After cleaning, the section 17 is again connected to the section 15 for other sampling and analysis phases.

Quoique la présente invention ait été décrite en relation avec des modes de réalisation particuliers, elle ne s'en trouve pas limitée pour autant mais est au contraire susceptible de modifications et de variantes qui apparaîtront à l'homme de l'art.  Although the present invention has been described in relation to particular embodiments, it is not thereby limited, but is on the contrary subject to modifications and variants which will appear to those skilled in the art.

Claims (9)

REVENDICATIONS 1. Dispositif d'analyse de fumées comprenant au moins un système d'analyse de gaz (9), et une ligne de transfert de gaz (8) entre la canne (7) et le système d'analyse (9), caractérisé en ce que la ligne de transfert (8) comporte au moins un tronçon amont (17) constitué d'un tube métallique (22) présentant des ondulations (24). 1. Smoke analysis device comprising at least one gas analysis system (9), and a gas transfer line (8) between the rod (7) and the analysis system (9), characterized in that the transfer line (8) comprises at least one upstream section (17) consisting of a metal tube (22) having corrugations (24). 2. Dispositif selon la revendication 1, caractérisé en ce que le tube ondulé (22) est flexible. 2. Device according to claim 1, characterized in that the corrugated tube (22) is flexible. 3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que le pas (1) des ondulations (24) rapporté à la hauteur (h) des ondulations est tel que i/h est compris entre 0,2 et 3. 3. Device according to claim 1 or claim 2, characterized in that the pitch (1) of the corrugations (24) relative to the height (h) of the corrugations is such that i / h is between 0.2 and 3. 4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la longueur du tube ondulé (22) est supérieure à 1 m. 4. Device according to one of the preceding claims, characterized in that the length of the corrugated tube (22) is greater than 1 m. 5. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce que le tube ondulé (22) est disposé sensiblement horizontalement dans la ligne de transfert (8). 5. Device according to one of claims 2 to 4, characterized in that the corrugated tube (22) is arranged substantially horizontally in the transfer line (8). 6. Dispositif selon l'une des revendications 2 à 5, caractérisé en ce que la ligne de transfert (8) comporte, en aval du tube ondulé (22), un moyen (20, 21) d'introduction à contre-courant d'un courant de gaz d'évacuation. 6. Device according to one of claims 2 to 5, characterized in that the transfer line (8) comprises, downstream of the corrugated tube (22), a means (20, 21) for introduction against the current d '' a stream of exhaust gas. 7. Dispositif selon la revendication 6, caractérisé en ce qu'il comporte un moyen (16) de raccordement démontable entre l'extrémité amont du tube ondulé (22) et la portion amont (15) de la ligne de transfert (8). 7. Device according to claim 6, characterized in that it comprises a means (16) of removable connection between the upstream end of the corrugated tube (22) and the upstream portion (15) of the transfer line (8). 8. Procédé de mise en oeuvre d'un dispositif selon la revendication 6 ou la revendication 7, caractérisé en ce que, après une période d'usage déterminée, on déconnecte le moyen de raccordement (16), on dégage l'extrémité amont du tube ondulé (22) de la partie amont (15) de la ligne de transfert (8) et on fait passer le gaz d'évacuation dans le tube ondulé. 8. Method for implementing a device according to claim 6 or claim 7, characterized in that, after a determined period of use, the connection means (16) are disconnected, the upstream end of the corrugated tube (22) of the upstream part (15) of the transfer line (8) and the exhaust gas is passed through the corrugated tube. 9. Procédé selon la revendication 8, caractérisé en ce qu'on agite le tube ondulé flexible (22) durant le passage du gaz d'évacuation.  9. Method according to claim 8, characterized in that the flexible corrugated tube (22) is agitated during the passage of the exhaust gas.
FR9203301A 1992-03-19 1992-03-19 DUST COLLECTION DEVICE FOR THE ANALYSIS OF FUMES AND METHOD OF IMPLEMENTING SUCH A DEVICE. Expired - Fee Related FR2688801B1 (en)

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FR9203301A FR2688801B1 (en) 1992-03-19 1992-03-19 DUST COLLECTION DEVICE FOR THE ANALYSIS OF FUMES AND METHOD OF IMPLEMENTING SUCH A DEVICE.

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FR9203301A FR2688801B1 (en) 1992-03-19 1992-03-19 DUST COLLECTION DEVICE FOR THE ANALYSIS OF FUMES AND METHOD OF IMPLEMENTING SUCH A DEVICE.

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FR2688801B1 FR2688801B1 (en) 1994-05-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735563A1 (en) * 1995-06-19 1996-12-20 Air Liquide PROCESS FOR MELTING A LOAD IN AN OVEN
US6038245A (en) * 1995-06-19 2000-03-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for melting a charge in an electrical arc furnace
CN109781924A (en) * 2019-03-04 2019-05-21 中国民用航空飞行学院 A kind of high molecular material combustion product gases test device for simulating hypobaric hypoxia environment

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DE1813877A1 (en) * 1968-12-11 1970-07-02 Hartmann & Braun Ag Gas sampling probe for very hot gases
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GB1370658A (en) * 1972-11-30 1974-10-16 British Steel Corp Control of pneumatic steelmaking process
DE8301616U1 (en) * 1983-04-28 Krupp Polysius Ag, 4720 Beckum, De

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DE1965990U (en) * 1967-04-05 1967-08-10 Siemens Ag EXTRACTION PROBE FOR GAS SAMPLES.
DE1813877A1 (en) * 1968-12-11 1970-07-02 Hartmann & Braun Ag Gas sampling probe for very hot gases
DE1815063A1 (en) * 1968-12-17 1970-06-25 Hartmann & Braun Ag Gas sampling apparatus for high dust - content gases
DE7013375U (en) * 1970-04-11 1970-09-03 Philipp Gather Kg DEVICE FOR THE TAKING OF EXHAUST GAS SAMPLES.
GB1370658A (en) * 1972-11-30 1974-10-16 British Steel Corp Control of pneumatic steelmaking process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735563A1 (en) * 1995-06-19 1996-12-20 Air Liquide PROCESS FOR MELTING A LOAD IN AN OVEN
WO1997000413A1 (en) * 1995-06-19 1997-01-03 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for melting a batch in an electric arc furnace
US6038245A (en) * 1995-06-19 2000-03-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for melting a charge in an electrical arc furnace
CN109781924A (en) * 2019-03-04 2019-05-21 中国民用航空飞行学院 A kind of high molecular material combustion product gases test device for simulating hypobaric hypoxia environment

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