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WO1998049353A2 - Procede de fonte d'acier dans un convertisseur - Google Patents

Procede de fonte d'acier dans un convertisseur Download PDF

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Publication number
WO1998049353A2
WO1998049353A2 PCT/RU1998/000030 RU9800030W WO9849353A2 WO 1998049353 A2 WO1998049353 A2 WO 1998049353A2 RU 9800030 W RU9800030 W RU 9800030W WO 9849353 A2 WO9849353 A2 WO 9849353A2
Authority
WO
WIPO (PCT)
Prior art keywords
iron
slag
carbon
blowing
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/RU1998/000030
Other languages
English (en)
Russian (ru)
Inventor
Anatoly Lukich Nikolaev
Alexandr Anatolievich Nikolaev
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
Priority claimed from RU97102406/02A external-priority patent/RU97102406A/ru
Application filed by Individual filed Critical Individual
Publication of WO1998049353A2 publication Critical patent/WO1998049353A2/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the invention is related to the black metal, and the name of the invention has ceased to be available in the inverterium.
  • the implementation of the invention allows to reduce the time necessary for the melting and reduction of oxidized iron-bearing material due to the extraction of gold. Restorative and oxidative processes in the slag and metal phases, which ensures an increase in the process efficiency.
  • ⁇ dn ⁇ v ⁇ emenn ⁇ with e ⁇ im is ⁇ lz ⁇ vanie iz ⁇ b ⁇ e ⁇ eniya s ⁇ zdae ⁇ usl ⁇ viya for shi ⁇ g ⁇ vyb ⁇ a ⁇ sidny ⁇ zhelez ⁇ s ⁇ de ⁇ zhaschi ⁇ ma ⁇ e ⁇ ial ⁇ v ⁇ a ⁇ i ⁇ , ⁇ a ⁇ iron ⁇ uda, agl ⁇ me ⁇ a ⁇ , ⁇ uda, ⁇ alina, ⁇ yli, sludge and shla ⁇ i s ⁇ ale ⁇ lavilny ⁇ ag ⁇ ega ⁇ v, ch ⁇ ⁇ bes ⁇ echivae ⁇ ⁇ a ⁇ iches ⁇ i ⁇ ln ⁇ e is ⁇ lz ⁇ vanie ⁇ d ⁇ v me ⁇ allu ⁇ giches ⁇ g ⁇ ⁇ izv ⁇ ds ⁇ va without s ⁇ etsialn ⁇ y ⁇ dg ⁇ v ⁇ i.
  • oxidized iron-containing materials On the basis of oxidized iron-containing materials, they use glass oxide, iron ore, sinter, dust, sludge, slag from steelmaking aggregates or mixtures thereof.
  • Organic gas is supplied with a mixture of neutral and oxidizing gases, and, as a result, neutral gas is used as a gas source and gas is used as a gas mixture.
  • the concentration of nitrogen and acid in the feed mixture is maintained at the level that ensures the reduction of the concentration of iron in the process of the reduction of the concentration of iron and iron. It is from 10: 1 to 1: 1, respectively.
  • the blower mixture is supplied as a ready-to-use mixture, in order to ensure that there is little to no impurity and no damage to it.
  • S ⁇ n ⁇ shenie between ⁇ m ⁇ nen ⁇ ami mixture v ⁇ ss ⁇ an ⁇ vi ⁇ eln ⁇ y ⁇ duv ⁇ i ⁇ dde ⁇ zhivayu ⁇ ⁇ d ⁇ n ⁇ lem ⁇ a ⁇ im ⁇ b ⁇ az ⁇ m, ch ⁇ by ⁇ bes ⁇ echi ⁇ usv ⁇ enie ⁇ ve ⁇ dy ⁇ ma ⁇ e ⁇ ial ⁇ v and ⁇ imaln ⁇ e ⁇ as ⁇ edelenie v ⁇ ss ⁇ anavlivaemy ⁇ elemen ⁇ v of s ⁇ ve ⁇ s ⁇ vuyuschi ⁇ ⁇ isl ⁇ v between me ⁇ all ⁇ m and shla ⁇ m.
  • Iron is loaded with iron-containing materials, which immediately begin to interact with each other. Carbon and other impurities of cast iron restore iron oxides. Carbon-containing material is used as a material that restores iron oxides, fuel, and a car heat exchanger (burner). Carbon-containing material is loaded in such quantities as to ensure heating, melting, and recovery of the specified quantity of oxides. The process of heating, smelting and restoring iron-containing materials is in parallel. In order to ensure that they are in good condition, they ensure that they are free of waste and that they are kept in good condition.
  • the direct regulation of iron oxidation and reduction processes does not only cause a slight loss of heat and the environment By reducing the consumption of acid in the blasting mixture and by supplying iron and carbon-containing materials, there is a significant increase in the efficiency of the material.
  • ⁇ gda ⁇ sidny zhelez ⁇ s ⁇ de ⁇ z haschy ma ⁇ e ⁇ ial ⁇ as ⁇ lavi ⁇ sya and susches ⁇ venn ⁇ v ⁇ ss ⁇ an ⁇ vi ⁇ sya, ⁇ d ⁇ n ⁇ lem izmenyayu ⁇ s ⁇ n ⁇ shenie ⁇ isl ⁇ da and az ⁇ a in ⁇ duv ⁇ chn ⁇ y mixture and ⁇ za ⁇ anee zadann ⁇ mu ⁇ ezhimu ⁇ susches ⁇ vlyayu ⁇ zag ⁇ uz ⁇ u za ⁇ anee ⁇ edelenn ⁇ y mass ugle ⁇ ds ⁇ de ⁇ zhascheg ⁇ ma ⁇ e ⁇ iala for ⁇ g ⁇ , ch ⁇ by ⁇ bes ⁇ echi ⁇ ⁇ luchenie ⁇ edva ⁇ i ⁇ eln ⁇ ⁇ edelenn ⁇ g ⁇ and zadann ⁇ g ⁇ for ⁇ ntsa in the eastern part of the process
  • the metal breaker is supplied with heat so that it can heat up and melt, which consumes large amounts of heat, and that the process is inactive. Under the various conditions stipulated by the maintenance of liquid cast iron and the mass of iron-containing material for melting, the metal can be supplied. With an oxide of less than 10% of the mass of liquid metal, the yield of liquid steel corresponds to the usual values at 86-88%. With an increase in the share of oxidized iron-containing material more than 30% of the mass of the metal, the process of smelting is less difficult due to the waste of the metal.
  • Condensed metal fume is a mixture of neutral and oxidizing gases used to stir the bath, to reduce the presence of metal fumes and to heat the oil.
  • the combination of neutral gas and oxidizing gas in a mixture separates the degree of oxidation of the impurities of the alloy and the temperature of the process.
  • P ⁇ i s ⁇ n ⁇ shenii ney ⁇ aln ⁇ g ⁇ gas and ⁇ isl ⁇ da b ⁇ lee 10 1 ⁇ ez ⁇ snizhae ⁇ sya ⁇ em ⁇ e ⁇ a ⁇ u ⁇ a me ⁇ alliches ⁇ g ⁇ ⁇ as ⁇ lava, zamedlyae ⁇ sya v ⁇ ss ⁇ an ⁇ vlenie ⁇ sidn ⁇ g ⁇ zhelez ⁇ s ⁇ de ⁇ zhascheg ⁇ ma ⁇ e ⁇ iala and g ⁇ enie ugle ⁇ ds ⁇ de ⁇ zhascheg ⁇ ma ⁇ e ⁇ iala and ⁇ a ⁇ zhe u ⁇ udshae ⁇ sya ⁇ e ⁇ emeshivanie bath and zamedlyayu ⁇ sya ⁇ e ⁇ l ⁇ and mass ⁇ bmennye ⁇ tsessy therein.
  • the concentration of neutral gas and oxygen in the mixture is less than 1: 1, the oxidation of the metal components increases, the concentration of the metal alloy, mainly iron, and the concentration of the iron decreases.
  • the yield of liquid metal depends on the optimal separation of the recovered iron from the oxidized iron between the metal and the metal.
  • composition of iron oxides in a slag of more than 60% indicates an uncompleted reduction of iron from oxidized iron and inadequate separation of iron between the slurry.
  • there is a wasteful interaction of metal with oxidized waste which results in a significant increase in the reduction of the amount of
  • intense metal emissions force the process to be oxidized, which lengthens the smelter and reduces the yield of the process.
  • Oxidizing and heating of a metal alloy for the release of parameters Oxidizing and heating of a metal alloy for the release of parameters.
  • ⁇ 150-and the second acid burner fill 145 tons of molten iron with the following chemical composition, weight. %: 4.4 C; 0.49 ⁇ ; 0.46 ⁇ ; 0.0198; and 0.22 ⁇ with a temperature of 1280 ° ⁇ . After casting, iron is loaded with 14.5 ⁇ of iron-containing material (direct calcine containing 71% of iron) and 4.0 ⁇ of carbon-containing material (ant).
  • coal is loaded with 3 t of the slag-forming material (lime), which accounts for 40% of the total amount of lime.
  • limestone 3 t
  • oxidizing agents which are metal blowers.
  • the most commonly used lime is to ensure that the slag is ready for use at the time of completion of the mixture with nitrogen and acid at a level of 1.2-1.4, but not at all 2.5.
  • the result of stirring and the interaction of all materials loaded into the inverture is the reduction of iron in the iron-carbon alloy.
  • the chemical composition of it at the time of termination of the injection with a mixture of nitrogen and oxygen makes up the weight. %: 4.2C; 0.20 ⁇ ; 0.21 ⁇ ; 0.0158; 0D42 ⁇ with a temperature of 1320 ° ⁇ , and the content of iron oxides in the slag is 30.5%.
  • an injection of a mixture of nitrogen and acid is allowed to be carried out by oxidizing a mixture of an acid and removing it from the process.
  • the mixture is produced by mixing nitrogen and an acid of the same pressure in a pipe leading to the furnace.
  • a metal of the following chemical composition is obtained,%: 0.11 ⁇ ; 0.18 ⁇ ; 0.013 8; 0.014 ⁇ with a temperature of 1620 ° ⁇ .
  • the total duration of the melts is 49 minutes, including the necessary for the recovery of iron from oxidized iron - 5 min, and for the oxidation of a non-oil
  • the total annual steel production is 139.6 tons or 96.3% of the total mass of iron (cast iron).
  • ⁇ As indicated in the table, a few floats, modes and results are shown in the table.
  • the yield of liquid steel is at a proposed rate of 90-98%, which is 6-8% higher than the comparison with the known methods of smelting.
  • the inventive invention may be used in a non-exhaustive gas system. With this process, both the one and the same liquid mixture are produced and when the metal is composed of liquid iron and metal. All necessary elements for the production of this technical solution are commercially available for free. Therefore, the claimed invention may be considered to be industrially applicable.

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  • 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

Cette invention se rapporte au domaine de la métallurgie des métaux ferreux et, notamment, à la production d'acier dans des convertisseurs. Cette invention concerne un procédé de fonte d'acier dans des convertisseurs, lequel procédé se distingue par son caractère économique en ce qui concerne la production d'acier liquide et l'utilisation des déchets de l'industrie métallurgique. Ce procédé se caractérise également par le choix des matériaux solides métalliques et non métalliques contenant du fer. Ce procédé se déroule dans un convertisseur équipé d'un dispositif de soufflage qui va assurer l'alimentation séparée ou combinée en gaz oxydant et en gaz neutre. Le mélange métallique de départ que l'on verse dans le convertisseur consiste en de la fonte sur laquelle on déverse un matériau à base d'oxydes et contenant du fer, ceci dans une quantité allant de 10 à 30 % en poids par rapport audit mélange de départ. On ajoute ensuite des matériaux de formation de laitier et contenant du fer. On procède simultanément à un soufflage désoxydant, ceci pendant la durée nécessaire à la désoxydation du fer de manière à en éliminer les matériaux à base d'oxydes et contenant du fer, et jusqu'à ce que les oxydes de fer représentent de 15 à 60 % du contenu du laitier. On procède enfin à un raffinage oxydant.
PCT/RU1998/000030 1997-02-14 1998-02-12 Procede de fonte d'acier dans un convertisseur Ceased WO1998049353A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU97102406970214 1997-02-14
RU97102406/02A RU97102406A (ru) 1997-02-14 Способ выплавки стали

Publications (1)

Publication Number Publication Date
WO1998049353A2 true WO1998049353A2 (fr) 1998-11-05

Family

ID=20189971

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU1998/000030 Ceased WO1998049353A2 (fr) 1997-02-14 1998-02-12 Procede de fonte d'acier dans un convertisseur

Country Status (1)

Country Link
WO (1) WO1998049353A2 (fr)

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