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ES2187863T3 - PROCEDURE AND DEVICE FOR MONITORING THE STATE OF THE ESCORIA AND THE STABILITY OF THE ARC OF AN ARC OVEN. - Google Patents

PROCEDURE AND DEVICE FOR MONITORING THE STATE OF THE ESCORIA AND THE STABILITY OF THE ARC OF AN ARC OVEN.

Info

Publication number
ES2187863T3
ES2187863T3 ES98114023T ES98114023T ES2187863T3 ES 2187863 T3 ES2187863 T3 ES 2187863T3 ES 98114023 T ES98114023 T ES 98114023T ES 98114023 T ES98114023 T ES 98114023T ES 2187863 T3 ES2187863 T3 ES 2187863T3
Authority
ES
Spain
Prior art keywords
arc
state
slag state
derivative
escoria
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
Application number
ES98114023T
Other languages
Spanish (es)
Inventor
Karl-Heinz Dr-Ing Klein
Gunter Dipl-Ing Paul
Vladimir Dipl-Ing Danilov
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.)
Badische Stahl Engineering GmbH
Original Assignee
Badische Stahl Engineering 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 Badische Stahl Engineering GmbH filed Critical Badische Stahl Engineering GmbH
Application granted granted Critical
Publication of ES2187863T3 publication Critical patent/ES2187863T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The method for determining the slag state in electric arc furnaces involves using a signal derived from the current i(t) flowing through the electrode (2). An n-th derivative of i(t) with respect to time is determined at given instants or continuously, where n may be equal to 2, 3 or 4. The effective value of this derivative is expressed as a mean square value over a specified integration period T. This value is compared with given limiting values to establish as to whether the slag state and the electrode cover are optimal. Also claimed is an apparatus which includes a current measurement unit (3), a differentiating unit (4), a checking unit (7) which produces a signal corresponding to the slag state. One or more lances (9) serve for introduction of carbonaceous material or oxygen into the furnace.
ES98114023T 1997-07-31 1998-07-27 PROCEDURE AND DEVICE FOR MONITORING THE STATE OF THE ESCORIA AND THE STABILITY OF THE ARC OF AN ARC OVEN. Expired - Lifetime ES2187863T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19733130A DE19733130A1 (en) 1997-07-31 1997-07-31 Method and device for detecting the state of slag and the stability of the arc in arc furnaces

Publications (1)

Publication Number Publication Date
ES2187863T3 true ES2187863T3 (en) 2003-06-16

Family

ID=7837574

Family Applications (1)

Application Number Title Priority Date Filing Date
ES98114023T Expired - Lifetime ES2187863T3 (en) 1997-07-31 1998-07-27 PROCEDURE AND DEVICE FOR MONITORING THE STATE OF THE ESCORIA AND THE STABILITY OF THE ARC OF AN ARC OVEN.

Country Status (4)

Country Link
EP (1) EP0896067B1 (en)
AT (1) ATE227779T1 (en)
DE (2) DE19733130A1 (en)
ES (1) ES2187863T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003528217A (en) * 2000-03-17 2003-09-24 スペシャルティ ミネラルズ （ミシガン） インク． Method and apparatus for automatically controlling slag foaming
DE102012217232A1 (en) * 2012-09-25 2014-03-27 Siemens Aktiengesellschaft Flicker reduction in electric arc furnaces by flicker prediction from the state determination in the initial phase of the melting process
EP3303959B1 (en) 2015-06-05 2020-10-14 Hatch Ltd. Flicker control for electric arc furnace
DE102016125046A1 (en) * 2016-12-20 2018-06-21 Vladimir Danilov Method and device for determining a parameter, process control, electric melting method, continuous casting method
CN117761480B (en) * 2023-12-22 2025-01-24 中国矿业大学 A method for detecting arc faults with resistance to load fluctuation based on ratio-RMS

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463893B (en) * 1987-09-28 1991-02-04 Geotronics Ab DEVICE FOR DETECTING THE LEVEL OF A BATTERY SURFACE OF A SMALL METAL BATH
US5115447A (en) * 1991-01-10 1992-05-19 Ucar Carbon Technology Corporation Arc furnace electrode control
ATA155793A (en) * 1993-08-04 1996-04-15 Voest Alpine Ind Anlagen METHOD FOR PRODUCING A METAL MELT AND SYSTEM FOR IMPLEMENTING THE METHOD
DE4425089C1 (en) * 1994-07-15 1996-01-11 Hamburger Stahlwerke Gmbh Process for controlling foam slag formation in a three-phase arc furnace

Also Published As

Publication number Publication date
EP0896067A1 (en) 1999-02-10
ATE227779T1 (en) 2002-11-15
DE59806252D1 (en) 2002-12-19
EP0896067B1 (en) 2002-11-13
DE19733130A1 (en) 1999-02-04

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