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WO2020260561A1 - Procédé pour mesurer une propriété magnétique du fer spongieux - Google Patents

Procédé pour mesurer une propriété magnétique du fer spongieux Download PDF

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Publication number
WO2020260561A1
WO2020260561A1 PCT/EP2020/067992 EP2020067992W WO2020260561A1 WO 2020260561 A1 WO2020260561 A1 WO 2020260561A1 EP 2020067992 W EP2020067992 W EP 2020067992W WO 2020260561 A1 WO2020260561 A1 WO 2020260561A1
Authority
WO
WIPO (PCT)
Prior art keywords
measurement
direct reduction
iron
information
carried out
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.)
Ceased
Application number
PCT/EP2020/067992
Other languages
German (de)
English (en)
Inventor
Daniel Wöckinger
Thomas BÜRGLER
Franz Hauzenberger
Robert Millner
Gerald Rosenfellner
Gerd Bramerdorfer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to ATA9204/2020A priority Critical patent/AT526499B1/de
Publication of WO2020260561A1 publication Critical patent/WO2020260561A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/004—Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2300/00—Process aspects
    • C21B2300/04—Modeling of the process, e.g. for control purposes; CII

Definitions

  • the invention relates to a method for obtaining at least one piece of information about a sponge iron, which is carried out by means of a in a direct reduction reactor
  • Direct reduction reactor - for example its magnetic permeability or its electrical conductivity - to win.
  • the disadvantage with regard to magnetic properties is that only at temperatures below the Curie temperature of iron useful information about iron content can be obtained; during the direct reduction process in
  • the measurement is in each case on a measured amount of the
  • the measurement amount is based at least in part on one after the direct reduction process has been carried out
  • the measurement quantity is based at least in part on a sample of measurement material taken from a material stream discharged from the direct reduction reactor after the direct reduction process has been carried out
  • Direct reduction process was produced can be obtained. It is, for example, information relating to
  • Ferromagnetic iron content It is, for example, information relating to
  • sponge iron is to be understood as a product of direct reduction with a
  • Carbon content Since magnetic properties are measured or recorded, the measurement or recording only provides information about carbon that is present with iron in a compound exhibiting the magnetic property.
  • Magnetic properties are properties that make that
  • At least one measurement of at least one magnetic property for example the magnetic permeability, at a temperature of the sponge iron
  • One or more magnetic properties can be measured.
  • One measurement or several measurements can be carried out.
  • the desired information is at least partially based on the result of the measurement or measurements
  • magnetic permeability information regarding the content of win ferromagnetic iron or degree of metallization or carbon content.
  • the information can be an indication of the actual amount of substance present if all particles of the substance are from the
  • Measurement methods can be recorded - for example in the case of the substance metallic iron. If the measuring method cannot record all the particles of a substance, the measurement provides information about the amount of substance in the substance that can be detected - for example, as stated above with regard to information regarding the substance carbon; only the carbon is recorded which is present with iron in a compound which has the measured magnetic property under the conditions of the measurement - for example cementite Fe 3 C.
  • the desired information is either obtained only on the basis of the result of the measurement or measurements, or it is obtained with the help of additional information - for example with the help of information about the temperature at which the measurement is made.
  • the direct reduction process is carried out in the direct reduction reactor.
  • the measurement is in each case on a measured amount of the
  • the measurement amount can - at least partially - on one after the implementation of the
  • Direct reduction process based on sample material taken from the direct reduction reactor.
  • the measurement amount can be based - at least in part - on a measurement material sample which is taken from a material flow discharged from the direct reduction reactor after the direct reduction process has been carried out.
  • the measurement set consists entirely of a subset or the entire
  • Measurement material sample can exist, or can also contain other components in addition to the partial amount or the entire measurement material sample, for example
  • the measured amount of sponge iron can also be in the material flow discharged from the direct reduction reactor after the direct reduction process has been carried out, that is to say without taking a sample of the material to be measured
  • the part of the system can be measured. This can be done, for example, by taking the measurement on a part of the system that conducts the flow of material, with the part of the system either not
  • Pipe section on which the measurement is carried out must be made of non-magnetic material - or its influence is known and can therefore be removed from the result of the measurement.
  • the system part can, for example, be a seal leg, a discharge chamber, chutes or lines for conveying material into the discharge chamber or from the discharge chamber to compacting devices.
  • the measurement quantity is based at least in part on an after implementation of the
  • this sponge iron is a product of direct reduction with a ratio of mass percent Fe 3 C cementite to mass percent metallic iron of less than 50%, preferably less than 30%. Below the Curie temperature of elemental iron
  • Measurement data obtained for the magnetic property have a particularly precise relation to the desired information about the sponge iron, so that from the measured magnetic property or from the measured magnetic
  • Degree of metallization can be obtained as follows on the basis of a measurement, similar to ISO 11258:
  • M is the degree of metallization of the measured quantity in
  • m FeM is the mass of metallic iron present in the measured quantity. According to HOT BRIQUETTED IRON (HBI) QUALITY ASSESSMENT GUIDE, International Iron Metallics Association August 2018, metallic iron is iron in non-oxidized form with an oxidation number of 0. Elemental iron and the iron content in compounds in which iron is present
  • Oxidation number 0 is present - for example iron in cementite Fe 3 C; the iron content in compounds that have metal-like properties, such as iron in
  • Cementite is referred to as metallic iron in the context of this application - are referred to as metallic iron in the context of this application.
  • m FeT is the mass of the total iron contained in the measured quantity; "Total iron”, T stands for total. According to HOT BRIQUETTED IRON (HBI) QUALITY ASSESSMENT GUIDE, International Iron Metallics Association August 2018, Total iron includes everything Iron in any form, whether free or combined with other elements such as oxygen.
  • m FeM is, for example, via measurements
  • ferromagnetic metallic iron since, for example, ferromagnetic magnetite Fe 3 O 4 has already been completely or practically completely reduced to non-ferromagnetic wustite (FeO) or metallic iron.
  • the total iron content m FeT can usually not be determined directly via ferromagnetic properties, but m FeT and thus the metallization can, for example, with the help of the chemical analysis of the starting materials for the
  • the gangue is rock that does not contain any iron compounds.
  • the total iron content m FeT is then calculated using a
  • the method also comprises
  • the detection is carried out in each case on a detection set of the sponge iron, with at least one member of the group on the detection set
  • the acquisition amount is based at least partially on a during and / or after the implementation of the
  • the detection amount is based at least partially on a detection material sample taken from a material flow discharged from the direct reduction reactor after the direct reduction process has been carried out
  • the acquisition amount it is based at least in part on one after the implementation of the
  • this sponge iron is a product of direct reduction with a ratio of mass percent Fe 3 C cementite to mass percent metallic iron of less than 50%, preferably less than 30%.
  • the detection relates to a temperature of the sponge iron above the Curie temperature of
  • elemental iron, elemental iron or iron compounds are not ferromagnetic, but paramagnetic. During the detection, any substances that may be present are detected that are ferromagnetic, but not elemental iron or
  • a correction factor for results of the measurement can thus be determined from the detection, which indicates the extent to which the result of the measurement cannot be caused by iron or iron compounds.
  • the measurement material sample and the acquisition material sample can be the same - the acquisition material sample can also be can be used as sample material or vice versa. In this way, the effort for taking samples is reduced.
  • the measurement amount and the detection amount can be the same
  • the acquisition quantity can also be used as a measurement quantity
  • the comminution is preferably carried out in an inert atmosphere in order to change the chemical composition
  • Determined collection amount This can increase the accuracy or reproducibility of the measurement or detection. This can be done before the measurement or acquisition, or after the measurement or acquisition.
  • At least one measurement at a temperature below the Curie temperature of elemental iron at least two measurements are preferably carried out. At a temperature below the Curie temperature of elemental iron, at least a first measurement is made at a temperature above the Curie temperature
  • ferromagnetic iron compound preferably cementite Fe 3 C
  • at least one further measurement below the Curie temperature of this iron compound was carried out. In this way information can be given about amount of this Iron compound, and in the case of cementite as above
  • the measurement amount is preferably set to a temperature below the Curie temperature
  • Iron compound cooled Active cooling, preferably to a desired final temperature, increases the speed of the process and the reproducibility of the measurement.
  • the carbon In order to be able to measure the carbon content using magnetic methods, the carbon must be present in a ferromagnetic compound, for example cementite Fe 3 C, so you can only measure the correspondingly bound carbon.
  • a ferromagnetic compound for example cementite Fe 3 C
  • m gebC mass or mass fraction or mass percentage (m-%) of bound carbon in the measured amount
  • m geb C [m FeM (T ⁇ T Fe 3C) _ m FeM (T Fe 3C ⁇ T ⁇ T Fe)] * mm C / (3 * mm Fe ) ⁇
  • m FeM (T ⁇ TFe3c) refers to an amount of metallic iron resulting from the measurement signal of a measurement at a temperature T below the Curie temperature of cementite TFe 3 C.
  • the measurement signal for metallic iron comes from elemental iron as well as from iron in the form of cementite Fe 3 C below the authorized level
  • ferromagnetic components are present in this temperature range.
  • m FeM (TFe3C ⁇ T ⁇ TFe) refers to an amount of elemental iron below the authorized amount resulting from the measurement signal of a measurement at a temperature T below the Curie temperature of elemental iron and above the Curie temperature of cementite TFe 3 C Assumption that no or
  • the measurement and / or the acquisition, preferably also the acquisition of the information, is preferably carried out in an automated manner. This speeds up the process and reduces the effort required to carry it out.
  • the measurement and / or the acquisition and / or the acquisition of the information is preferably carried out continuously or quasi-continuously. It is under continuously
  • the sample of acquisition material runs continuously and a measurement or recording takes place at least once every 30 minutes.
  • quasi-continuous is preferably to be understood as meaning that an existing device for taking the measurement material sample and / or
  • the sample of the acquisition material runs discontinuously and a measurement or acquisition takes place at least once every 30 minutes. This allows quick information about the properties of the sponge iron and subsequently enables any necessary information to be taken quickly
  • Another subject matter of the present application is a direct reduction process which is regulated at least partially on the basis of information obtained according to the invention.
  • the regulation is either only based on the
  • Another object of the present application is a signal processing device with a machine-readable program code, characterized in that it contains control commands for controlling an inventive
  • Another subject matter of the present application is a machine-readable program code for a signal processing device according to the invention, characterized in that the program code has control commands which the
  • Trigger signal processing device to regulate.
  • Another subject matter of the present application is a storage medium with a stored on it
  • Figure 1 shows an embodiment with removal of a
  • FIG. 2 shows another embodiment with taking a sample of the acquisition material.
  • FIG. 3 shows an embodiment in which the measured amount of sponge iron is in the material flow during the measurement.
  • Sponge iron is carried out.
  • Reducing gas 2 is introduced into the direct reduction reactor and reduces the iron oxide-containing material contained in it, with sponge iron 3 being formed.
  • a sponge iron sample to be measured is taken via a removal device 4 - for example a
  • the measurement of the magnetic property is made on a measurement amount based on the so
  • the measuring material sample is cooled to a temperature below the Curie temperature of iron when it is removed.
  • the mass of the measured quantity is determined, which is not shown separately for better clarity.
  • the measured amount is a serving of the
  • the measurement amount can be how
  • the pipe connection 8 is shown by way of example, be part of a material column which is located in a pipe connection 8 on which the Measurement is performed.
  • the pipe connection 8 is in
  • Area of the measuring device made of non-magnetic material.
  • the sponge iron is fed to a further measuring device 10 by means of a cooling screw 9. It is cooled to a temperature below the Curie temperature of cementite. Cooled in this way, a second measurement is carried out in the same way as the first measurement.
  • the results of the first measurement and the second measurement are fed to an evaluation unit 11 in which the
  • Signal processing device with a machine-readable program code, with which the direct reduction process is regulated on the basis of the information obtained.
  • the measurements and the acquisition of the information take place automatically and continuously.
  • FIG. 2 shows another embodiment in a representation that is largely analogous to FIG.
  • the measuring material sample of FIG. 1 is conditioned and fed to a detection device 14 via a transport device 13.
  • the detection of the magnetic property is made on an amount of detection based on the conditioned sample of the detection material.
  • Capture amount is one serving of
  • Detection device 14 is located. As shown by way of example, the amount to be detected can be part of a column of material be located in a pipe connection 15 on which the measurement is carried out.
  • the pipe connection 15 is made of non-magnetic material in the area of the detection device.
  • the detection amount when detected has a temperature above the Curie temperature of elemental iron; there is no cooling during the supply to the detection device 14.
  • the sponge iron is measured using a
  • Cooling screw 16 is fed to a measuring device 17. It is cooled to a temperature below the Curie temperature of elemental iron. Cooled in this way, a first measurement is carried out analogously to the description in FIG. 1. After the first measurement carried out by means of the measuring device 17, the sponge iron is fed to a further measuring device 19 by means of a cooling screw 18. It is cooled to a temperature below the Curie temperature of cementite. Cooled in this way, a second measurement is carried out in the same way as the first measurement.
  • the acquisition material sample also serves as a
  • Measuring material sample After being transported into a measuring device, the quantity to be recorded can serve as a quantity to be measured.
  • the results of the acquisition, the first measurement and the second measurement are fed to an evaluation unit 20 in which the desired information is obtained through mathematical
  • FIG. 3 is largely more analogous to FIGS. 1 and 2
  • Direct reduction process is diverted from the direct reduction reactor material flow.
  • the measurement is carried out by means of the measuring device 30 on a pipe section 31 which conducts the material flow and which has no influence on the measurement because it is made of non-magnetic material

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

La présente invention concerne un procédé pour obtenir au moins une information à partir du groupe - information concernant la teneur en fer ferromagnétique, - information concernant le degré de métallisation, - information concernant la teneur en carbone, via un fer spongieux (3) produit au moyen d'un procédé de réduction directe réalisé dans un réacteur de réduction directe (1). Il comprend au moins une mesure d'au moins une propriété magnétique à une température du fer spongieux (3) inférieure à la température de Curie du fer élémentaire et l'obtention de l'information au moins partiellement basée sur le résultat de la mesure. La mesure est effectuée dans chaque cas sur une quantité mesurée du fer spongieux (3) qui est basée sur un échantillon de matière mesurée prélevé dans le réacteur de réduction directe (1) après que le processus de réduction directe a été réalisé ou sur un échantillon de matière mesurée prélevé dans un courant de matière évacué du réacteur de réduction directe (1) après que le processus de réduction directe a été réalisé, ou qui se trouve dans le courant de matière pendant la mesure.
PCT/EP2020/067992 2019-06-27 2020-06-26 Procédé pour mesurer une propriété magnétique du fer spongieux Ceased WO2020260561A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ATA9204/2020A AT526499B1 (de) 2019-06-27 2020-06-26 Verfahren zur Messung einer magnetischen Eigenschaft von Eisenschwamm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19182766.6 2019-06-27
EP19182766.6A EP3757233A1 (fr) 2019-06-27 2019-06-27 Procédé de mesure d'une propriété magnétique d'une éponge de fer

Publications (1)

Publication Number Publication Date
WO2020260561A1 true WO2020260561A1 (fr) 2020-12-30

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Application Number Title Priority Date Filing Date
PCT/EP2020/067992 Ceased WO2020260561A1 (fr) 2019-06-27 2020-06-26 Procédé pour mesurer une propriété magnétique du fer spongieux

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Country Link
EP (1) EP3757233A1 (fr)
AT (1) AT526499B1 (fr)
WO (1) WO2020260561A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113465658A (zh) * 2021-05-24 2021-10-01 湖南大学 基于磁导率的非接触式测温及物料成分检测装置与方法
CN118258864A (zh) * 2024-03-05 2024-06-28 河北河钢材料技术研究院有限公司 一种检测氢基竖炉直接还原铁金属化率的装置及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4180801B1 (fr) * 2021-11-15 2024-01-10 voestalpine Stahl GmbH Procédé de détermination d'au moins la teneur en fer métallique dans une éponge de fer ou dans un échantillon de celle-ci fabriqué par réduction directe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017001A1 (de) 1979-05-03 1980-11-20 Pullman Inc Vorrichtung und verfahren zum reduzieren von eisenerz
US6270741B1 (en) * 1997-02-28 2001-08-07 Kawasaki Jukogyo Kabushiki Kaisha Mitsubishi Corporation Operation management method of iron carbide production process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017001A1 (de) 1979-05-03 1980-11-20 Pullman Inc Vorrichtung und verfahren zum reduzieren von eisenerz
US6270741B1 (en) * 1997-02-28 2001-08-07 Kawasaki Jukogyo Kabushiki Kaisha Mitsubishi Corporation Operation management method of iron carbide production process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113465658A (zh) * 2021-05-24 2021-10-01 湖南大学 基于磁导率的非接触式测温及物料成分检测装置与方法
CN118258864A (zh) * 2024-03-05 2024-06-28 河北河钢材料技术研究院有限公司 一种检测氢基竖炉直接还原铁金属化率的装置及方法

Also Published As

Publication number Publication date
EP3757233A1 (fr) 2020-12-30
AT526499B1 (de) 2024-04-15
AT526499A5 (de) 2024-04-15

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