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WO2003056040A1 - Procede de production de metal carbone liquide a base de fer - Google Patents

Procede de production de metal carbone liquide a base de fer Download PDF

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Publication number
WO2003056040A1
WO2003056040A1 PCT/RU2002/000541 RU0200541W WO03056040A1 WO 2003056040 A1 WO2003056040 A1 WO 2003056040A1 RU 0200541 W RU0200541 W RU 0200541W WO 03056040 A1 WO03056040 A1 WO 03056040A1
Authority
WO
WIPO (PCT)
Prior art keywords
iron
production
carbon
metal
materials
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/RU2002/000541
Other languages
English (en)
Inventor
Vladimir Mihailovich Shchedrin
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2002367162A priority Critical patent/AU2002367162A1/en
Publication of WO2003056040A1 publication Critical patent/WO2003056040A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/10—Making pig-iron other than in blast furnaces in electric 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
    • C21B13/0073—Selection or treatment of the reducing gases

Definitions

  • the method relates to metallurgy and namely to the production of liquid carbonaceous metal on the iron base without agglomeration of ores and coking coals.
  • the rate of energy consumption and economic indices of production depend upon its scheme - relative quantity of iron reduced "by solid carbon" with CO formation, - "direct reduction degree” r d .
  • r d l
  • complete combustion of CO with oxygen and transmitting of the evolved heat to the reduction zone the heat excess in system is equal to 3.41 GJ, or 116 kg of conventional fuel per 1 1 Fe.
  • the amount of necessary external heat compensation depends upon a scheme, and is minimal at r ⁇ ⁇ l[l].
  • the scheme of the process does not take into account the unique property of carbon as an energy source: despite the general rule, the cohesion with it of the first atom of oxygen gives less heat than of the second one 2 . Less than 40% of carbon caloricity is realized therefore. It explains the similarity of energy consumption in agglo,-coke,-blast furnace cycle and in processes with electric energy application: the efficiency of transformation of primary fuel heat content into electric energy is 0.31 in CIS and 0.37 as an average in Europe. The energy consumption in agglo,-coke, -blast furnace cycle is 23.4 GJ/t. With the return of
  • Rate of iron reduction depends on its intensity. Rate of iron reduction differs for various combinations of aggregate states of oxide and reductant. Most slowly iron is reduced from solid oxides by gas, and it is of no importance by what method the gas was obtained: either by gasification of a solid fuel (processes Corex, Purofex, HyL-III) or with the help of natural gas reforming (Midrex). In the last case (shaft furnace of Orsk-Khalilov metallurgical plant) the intensity is only 0.04 kg Fe/m 3 sec [6]. The specific productivity of a blast furnace (at the usual smelting rate of 0.5t of pig iron daily per 1 m 3 of the volume) is equal to 0.05 kg Fe/m 3 sec. The gaseous metallurgy is perspective only if the intensity of a process is of no significance.
  • Carbon dissolved in liquid iron reduces iron of solid oxide most quickly: 22 kg Fe/m 3 sec, i.e. 440 times as quick than by gas, and 5-10 times more rapidly than by free carbon. Rate of the process falls with the increase of carbon activity a c in the melt up till the saturation (a c 1) [7,8] (see the figure). Apparantly the phenomenon is linked with iron embryos formation and their dissolution in the bath. The dissolution of even compact iron in a bath proceeds with the rate of 3 order higher than that one following from the theory of convective diffusion, as has been settled by the method with a disk of equally accessible surface [9]. The anomaly remains to be unexplained, but it does not hinder the use of it in processes including the pertinent stage, for example - in the claimed one.
  • Analogs of the invented method can be divided into two categories. One of them is characterized with employment of a proper material (in our case - ore-carbon briquettes or
  • At Elwood-sity plant (USA) iron is produced by heating of ore-coal pellets in a "rotary hearth” furnace (a ring furnace of the roundabout type) - with subsequent melting of semiproduct in electric furnace.
  • the layer of pellets on the pallets is heated to 1250-1550°C from above with gas stream from burners, removing 90-95%O 2 [13].
  • the charge here can be continuously loaded through the input opening and metal continuously poured through the taphole.
  • Such a process is energetically profitable as here there is no the loss of power in periods of charging and tapping.
  • High-alumina and mullite firebrick remain fit to further work even after 8,5 months of exploitations [18].
  • 155 To diminish heat losses and energy consumption is useful to apply aggregates of a big capacity, for example such as the channel induction furnace of 6000 kW power, 1500 1 capacity, and the productivity of 57 tons of scrap per hour. Taking into account the successful exploitation of such furnace at ISCOR plant (South Africa) the furnace has been constructed by Ajax Magnethermic Corp. (USA) for the Fukuoke plant of the Nippon Steel (Japan) intended for metal
  • the crucible has an induction coil of 3 m in diameter and 1.9 m height.
  • the aggregate worked in a mixer regime, had a productivity of 5 t/h, and produced 98t of pig iron containing 3.4-3.9%C and 271 of highly basic slag containing only 1% FeO.
  • the combustion of gas, coal and black mineral oil in the volume under the dome according to calculation covered 90% of the heat needed in process.
  • the rate of reduction in this case must not depend upon a size of lamps and must be determined by the rate of charging.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de production de métal carboné liquide à base de fer consistant à préparer des matériaux de fer-carbone boulettes ou briquettes à partir de compléments finement dispersés, à introduire ceux-ci dans un four électrique à induction fermé, puis à soumettre les gaz s'échappant à une postcombustion au moyen d'oxygène ou d'air dans le volume au-dessus du bain, et à transmettre la chaleur de combustion à la zone de réaction par radiation du dôme et il est caractérisé en ce que les composants destinés à la préparation de matériaux de fer-carbone sont dosés par calcul, de manière à obtenir un métal renfermant pas plus de 3 % de C et une granulométrie de ces matériaux inférieure à 5 sm. La mise en oeuvre du procédé selon l'invention consiste à utiliser des fours électriques à induction à creuset à fréquence industrielle selon la nouvelle application, comme agrégats destinés à produire le métal à partir de matériaux bruts, pas uniquement pour la fusion, comme c'est le cas actuellement. Le procédé permet, simultanément avec la production principale, d'utiliser des seconds matériaux bruts à grande échelle. Le procédé selon l'invention répond également aux demandes écologiques.
PCT/RU2002/000541 2001-12-25 2002-12-20 Procede de production de metal carbone liquide a base de fer Ceased WO2003056040A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002367162A AU2002367162A1 (en) 2001-12-25 2002-12-20 Method of production of liquid carbonaceous iron based metal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2001134931/02A RU2219245C2 (ru) 2001-12-25 2001-12-25 Способ производства жидкого углеродистого металла на основе железа
RU2001134931 2001-12-25

Publications (1)

Publication Number Publication Date
WO2003056040A1 true WO2003056040A1 (fr) 2003-07-10

Family

ID=20254854

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2002/000541 Ceased WO2003056040A1 (fr) 2001-12-25 2002-12-20 Procede de production de metal carbone liquide a base de fer

Country Status (3)

Country Link
AU (1) AU2002367162A1 (fr)
RU (1) RU2219245C2 (fr)
WO (1) WO2003056040A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5411570A (en) * 1993-06-16 1995-05-02 Iscor Limited Steelmaking process
RU2080391C1 (ru) * 1993-06-01 1997-05-27 Институт металлургии им.А.А.Байкова РАН Способ прямого получения железа
RU2102494C1 (ru) * 1995-02-27 1998-01-20 Волгоградский государственный технический университет Способ получения чугуна и стали в металлургических агрегатах

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2080391C1 (ru) * 1993-06-01 1997-05-27 Институт металлургии им.А.А.Байкова РАН Способ прямого получения железа
US5411570A (en) * 1993-06-16 1995-05-02 Iscor Limited Steelmaking process
RU94021346A (ru) * 1993-06-16 1996-06-27 Искор Лимитед (ZA) Способ получения стали и устройство для его осуществления
RU2102494C1 (ru) * 1995-02-27 1998-01-20 Волгоградский государственный технический университет Способ получения чугуна и стали в металлургических агрегатах

Also Published As

Publication number Publication date
AU2002367162A1 (en) 2003-07-15
RU2219245C2 (ru) 2003-12-20

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