EP2502015A2 - Procédé et dispositif pour réduire la demande d'énergie métallurgique de fours de fusion et/ou de réduction électriques fermés - Google Patents

Procédé et dispositif pour réduire la demande d'énergie métallurgique de fours de fusion et/ou de réduction électriques fermés

Info

Publication number
EP2502015A2
EP2502015A2 EP10796304A EP10796304A EP2502015A2 EP 2502015 A2 EP2502015 A2 EP 2502015A2 EP 10796304 A EP10796304 A EP 10796304A EP 10796304 A EP10796304 A EP 10796304A EP 2502015 A2 EP2502015 A2 EP 2502015A2
Authority
EP
European Patent Office
Prior art keywords
reduction furnace
gas
melting
rotary tube
gas engine
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.)
Withdrawn
Application number
EP10796304A
Other languages
German (de)
English (en)
Inventor
Roland König
Rolf Degel
Jürgen Kunze
Hartmut Schmieden
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.)
SMS Siemag AG
Original Assignee
SMS Siemag AG
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 SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2502015A2 publication Critical patent/EP2502015A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F27D17/10—Arrangements for using waste heat
    • 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
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/562—Manufacture of steel by other methods starting from scrap
    • C21C5/565—Preheating of scrap
    • 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
    • F27B3/26—Arrangements of heat-exchange apparatus
    • 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
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F27D13/002—Preheating scrap
    • 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
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
    • F27D17/304—Arrangements for extraction or collection of waste gases; Hoods therefor specially adapted for electric arc furnaces
    • 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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/466—Charging device for converters
    • C21C2005/4666—Charging device for converters for charging with organic contaminated scrap
    • 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
    • C21C2100/00—Exhaust gas
    • C21C2100/06—Energy from waste gas used in other processes
    • 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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/36—Processes yielding slags of special composition
    • 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
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F27D2013/007—Apparatus for preheating charges; Arrangements for preheating charges using a rotary furnace
    • 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

Definitions

  • the invention relates to a method and a device for reducing the metallurgical energy requirement of a closed electric melting and / or reduction furnace for the production of iron alloys, metals, silicon, for recycling processes and chemical processes, wherein the resulting CO-rich process gas of the melting and / or reduction furnace is burned after cooling and subsequent gas cleaning in a gas engine to drive a generator for generating electrical energy.
  • Electric smelting furnaces are used for the production of alloys, silicon, for recycling processes and chemical processes. If oxidic constituents are reduced, a CO-rich gas is produced. In so-called open furnaces, this strongly CO-containing gas burns directly on the surface of the furnace filled with feed material (Möller) to CO2. The hot exhaust gases are partially collected, cleaned and the thermal energy used in some cases for hot water or steam generation.
  • the electric melting and reduction furnace is equipped with a gas-tight lid.
  • the process gas remains without fresh air supply in a so-called gas space above the feed material in the oven and is supplied via exhaust pipes for cooling and subsequent cleaning.
  • the thus purified exhaust gas can be burned and used for steam generation.
  • This steam is used in chemical companies as process steam, in other cases it is used to generate electricity by means of steam turbines.
  • EP 0139 310 B1 a process for the production of liquid, carbonaceous iron from sponge iron is known, wherein sponge iron in reduced rotary kiln, the reduced material charged after a treatment in the electric reduction furnace, the carbonaceous iron produced is carburized and finally blown in a converter to steel.
  • the process gases arising in the rotary kiln, in the electroreduction furnace and in the converter are each supplied to an electric power generation, consisting of an afterburning, steam generation and power generation.
  • the generated electrical energy is supplied to the electroreduction furnace and used for oxygen generation for the converter.
  • the object is achieved with the characterizing features of claim 1, characterized in that to reduce the energy required for the running in the electric melting and / or reduction furnace metallurgical / chemical process, the hot combustion gases of the gas engine to specifically increase the inlet temperature of the melt into the and / or reduction furnace to be entered feed material.
  • an apparatus for carrying out this method is specified by the characterizing features of claim 7.
  • the hot exhaust gases of gas engines are not used for the recovery of energy in the form of steam or electrical energy, but to reduce the energy required for the running in the electric melting and / or reduction furnace metallurgical or chemical Process by increasing the inlet temperature of the feed material in the electric melting and / or reduction furnace. Since a significant proportion of the energy to be introduced into the electric melting and / or reduction furnace is required for heating and melting the charge material (Möllers), metallurgical energy can be directly saved in this way without energy conversion stages and thus the energy requirement of the furnace becomes clear to reduce.
  • the heating of the feed material to increase its inlet temperature in the melting and / or reduction furnace in direct contact with the hot combustion gases of the gas engine is carried out in a traversed by the combustion gases rotary kiln or similar aggregate.
  • the rotary tube or similar unit is arranged above the melting and / or reduction furnace or adjacent to it in the feed line and connected for the supply of hot combustion gases via an insulated gas line to the gas engine.
  • the local proximity of the rotary tube or comparable aggregate to the melting and / or reduction furnace is important in this case, since otherwise during a wide transport weges the heated feed material undesirably cools again and incur unnecessary transport and insulation costs.
  • the rotary tube or the comparable unit is designed so that in order to produce an intensive heat exchange between the about 500 ° C hot combustion gases of the gas engine and the feed material, the combustion gases are passed in countercurrent to the feed material through the rotary tube or by the comparable unit.
  • the rotary tube or the comparable unit is arranged inclined in the conveying direction, or the interior of the rotary tube or the comparable unit is formed with appropriate means, such as lifting blades.
  • the cooled combustion gases contain dust constituents of the feed material which can be removed in a simple manner, for example by means of a bag filter.
  • the gas engine cooling water also contains a small amount of usable heat energy, the gas engine cooling water can be supplied to a company for the use of this heat energy.
  • the inventive process chain of electrical melting and / or reduction furnace, process gas purification, gas engine for power generation by means of generator and rotary tube or similar unit as a heat exchanger for targeted preheating of the feedstock thus represents an optimized use of gas engine technology for electrical melting and / or reduction furnaces with high efficiency ,
  • the basis of the process chain of the electric reduction furnace 1 is a Submerged arc furnace (SAF), which is filled in a chamber by means of conveying with the taken from an intermediate storage 6 feed material.
  • SAF Submerged arc furnace
  • the resulting in this reduction furnace 1 process gases are supplied via a process gas line 21 (not shown) cooling and gas cleaning 2 and then pass through a further process gas line 22 to a gas engine 3, in which the cooled and purified process gases for driving a generator 4 for generating be burned by e- lectric energy 25.
  • a rotary tube 5 inclined towards the reduction furnace 1 is arranged for heating the charge material.
  • the initially still cold feed material taken from the intermediate storage 6 is introduced via the conveying means 11 into the upper end (in the figure on the right) of the tilted rotary tube 5 and transported there in the conveying direction 12 to the lower discharge end (on the left in the drawing figure).
  • the combustion gases which are produced during the combustion of the process gases in the gas engine 3 and reach about 500 ° C. pass through a correspondingly insulated gas line 23 from the gas engine 3 to the rotary tube 5 and are introduced there at the discharge end.
  • the combustion gases flow through the rotary tube 5 in the flow direction 24 opposite to the conveying direction 12 of the feed material according to the countercurrent principle.
  • the hot feed material leaving the rotary tube 5 at the discharge end becomes as insulated as possible with a heat-resistant conveying means 13 Intermediate storage 7 and from there charged with a further heat-resistant conveyor 14 into the reduction furnace 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture Of Iron (AREA)

Abstract

Pour exploiter le gaz de processus, riche en CO, produit dans un four de fusion et/ou de réduction électrique fermé (1) destiné à la production d'alliages de fer, de métaux, de silicium, à des processus de recyclage et des processus chimiques, on brûle ce gaz de traitement dans un moteur à gaz (3) pour entraîner un générateur (4) servant à produire de l'énergie électrique. L'objectif de l'invention est d'accroître davantage le rendement de ces installations équipées de moteurs à gaz. À cet effet, les gaz de combustion chauds du moteur à gaz (3) sont utilisés pour augmenter, de manière ciblée, la température d'entrée de la charge à introduire dans le four de fusion et/ou de réduction (1).
EP10796304A 2009-11-19 2010-11-18 Procédé et dispositif pour réduire la demande d'énergie métallurgique de fours de fusion et/ou de réduction électriques fermés Withdrawn EP2502015A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009053920A DE102009053920A1 (de) 2009-11-19 2009-11-19 Verfahren und Vorrichtung zur Verminderung des metallurgischen Energiebedarfs von geschlossenen elektrischen Schmelz- und/oder Reduktionsöfen
PCT/EP2010/067768 WO2011061261A2 (fr) 2009-11-19 2010-11-18 Procédé et dispositif pour réduire la demande d'énergie métallurgique de fours de fusion et/ou de réduction électriques fermés

Publications (1)

Publication Number Publication Date
EP2502015A2 true EP2502015A2 (fr) 2012-09-26

Family

ID=43901998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10796304A Withdrawn EP2502015A2 (fr) 2009-11-19 2010-11-18 Procédé et dispositif pour réduire la demande d'énergie métallurgique de fours de fusion et/ou de réduction électriques fermés

Country Status (3)

Country Link
EP (1) EP2502015A2 (fr)
DE (1) DE102009053920A1 (fr)
WO (1) WO2011061261A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3101375B1 (fr) * 2015-06-02 2020-08-05 SMS group GmbH Procédé pour la fabrication de fecr dans un four de réduction ac dans le processus à scories avec arc électrique optionnel contrôlé par un thyristor
CN114754580A (zh) * 2022-04-29 2022-07-15 沈阳益富冶炼技术装备有限公司 一种自带辅助电源的碳还原反应电炉系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT7904898U1 (it) * 1979-07-25 1981-01-25 Gavioli Gabriele Impianto di depurazione e recupero calore di fumi di forni di passaggio
DE3334221A1 (de) 1983-08-25 1985-03-14 Mannesmann AG, 4000 Düsseldorf Verfahren zur erzeugung von fluessigem, kohlenstoffhaltigem eisen aus eisenschwamm
JP4496950B2 (ja) * 2004-01-09 2010-07-07 株式会社日立製作所 改質炉システム
US20080289364A1 (en) * 2007-05-23 2008-11-27 Pinkham Jr Daniel Method and system for preheating glass batch or ingredient(s)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011061261A2 *

Also Published As

Publication number Publication date
WO2011061261A2 (fr) 2011-05-26
WO2011061261A3 (fr) 2011-07-14
DE102009053920A1 (de) 2011-05-26

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