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EP0235291A1 - Procede pour l'obtention de laitier de vanadium - Google Patents

Procede pour l'obtention de laitier de vanadium Download PDF

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Publication number
EP0235291A1
EP0235291A1 EP86900680A EP86900680A EP0235291A1 EP 0235291 A1 EP0235291 A1 EP 0235291A1 EP 86900680 A EP86900680 A EP 86900680A EP 86900680 A EP86900680 A EP 86900680A EP 0235291 A1 EP0235291 A1 EP 0235291A1
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EP
European Patent Office
Prior art keywords
vanadium
slag
mass
pig iron
iron
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.)
Granted
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EP86900680A
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German (de)
English (en)
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EP0235291A4 (fr
EP0235291B1 (fr
Inventor
Leonid Andreevich Smirnov
Jury Stepanovich Schekalev
Anatoly Anatolievich Filippenkov
Jury Andreevich Deryabin
Oleg Nikolaevich Kokareko
Viktor Grigorievich Udovenko
Gennady Nikolaevich Vasilenko
Mikhail Andreevich Tretyakov
Boris Dmitrievich Chervyakov
Sergei Petrovich Kiselev
Vitaly Grigorievich Korogodsky
Vladimir Yakovlevich Litovsky
Vasily Tikhonovich Arnautov
Irek Nasyrovich Gubaidullin
Alexandr Nikitovich Glazov
Ernst Yakovlevich Sidelkovsky
Valery Viktorovich Skripchenko
Felix Stefanovich Rakovsky
Vyacheslav Nikolaevich Zelenov
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.)
CHUSOVSKOI METALLURGICHESKY ZAVOD
NIZHNETAGILSKY METALLURGICHESKY KOMBINAT IMENI
URALSKY NAUCHNO-ISSLEDOVATELSKY INSTITUT CHERNYKH METALLOV
Original Assignee
CHUSOVSKOI METALLURGICHESKY ZAVOD
NIZHNETAGILSKY METALLURGICHESKY KOMBINAT IMENI
URALSKY NAUCHNO-ISSLEDOVATELSKY INSTITUT CHERNYKH METALLOV
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Publication of EP0235291A1 publication Critical patent/EP0235291A1/fr
Publication of EP0235291A4 publication Critical patent/EP0235291A4/fr
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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
    • C21C5/36—Processes yielding slags of special composition

Definitions

  • the invention relates to the field of "metallurgy", in particular it relates to compositions of vanadium slags and processes for their production in converters with a lower or upper wind or with a combined fan wind in the oxidation of vanadium pig iron.
  • Vanadium slag which is formed in the oxidation of vanadium-containing pig iron in converters or in other aggregates, is a raw material for the production of vanadium pentoxide, which is primarily used for the extraction of ferrovanadine and other alloys rich in vanadium.
  • vanadium slag has increased significantly, which is used directly for the production of vanadium-alloyed metals such as cast iron, steel and alloys.
  • the chemical and mineralogical composition of the vanadium slag is subject to special requirements depending on its intended use.
  • the slag is subject to particularly stringent requirements for further processing.
  • Vanadium pentoxide can be used in which there are certain optimal concentration ranges for each component of the slag (depending on the processing scheme adopted).
  • the slag produced contains, in mass%: (NPLyakishev and others. Vanadium in black metallurgy. Verlag “Metallurgia”, 1983, p.36)
  • the vanadium slag which, in mass%, 10-15 V205; 35-45 FeO; 8-13.5 TiO 2 ; 7.6-35.4 SiO 2 ; 2.7-5.7 MnO; Contains 0.9-1.5 CaO and is obtained from pig iron which, in mass%, 4.5 C; 0.37 V; 0.2 Si; 0.21 Mn; 0.05 P; 0.05 S; 0.12 Ti, but is extremely low in vanadium and its further processing is associated with a significant consumption of reactants.
  • a method for producing vanadium slag by inflating oxygen in pig-iron vibrating pans which, in% by mass, 3.95 C; 1.10 V; 0.24 Si; 0.22 Ti; 0.22 man; 0.08 P; 0.087 S; 0.29 Cr; 0.04 Cu; 0.4 Ni.
  • the vanadium slag obtained contains, in% by mass: (Journal of the Iron and Steel Inst., April, 1970, p.340).
  • this composition of the slag is obviously not ideal for the extraction of vanadium pentoxide; the temperature conditions of its production (in a range from 1180 to 1270 ° C) do not allow to obtain sufficiently large (over 50 ⁇ m) spinellide grains in the slag, which are well suited for the oxidizing roasting of the slag.
  • the main indicator of the processes for fresh vanadium-containing pig iron with the formation of vanadium sludge is the degree of vanadium discharge into the slag, which is based on the relative amount of vanadium which is converted from the pig iron into the slag, i.e. is composed of the degree of vanadium slagging, and the relative amount of vanadium recovered with the slag as the latter separates from the metal.
  • the degree of slagging of vanadium is mainly determined by the temperature of metal at the end of the vanadium application and is 93.4 to 93.5%.
  • a first value of the degree of slagging of vanadium relates to the process that was implemented in South Africa (see Journal of the Iron and Steel Inst., April 1970, 8,340), in which the final temperature of the metal is at most 1300 ° C (more precisely 1270 ° C) and a second value relates to the freshening that was carried out in converters with oxygen bubbles in the USSR, where the metal temperature at the end of the vanadium application reaches 1370 ° C (see Smirnov LA "Metallurgischeskaya pererabotka titanomagnetitovykh rud"; Swerdlovsk, publisher of the Institute “UralNII-chermet", Volume No. 18, pp.58-76).
  • a further increase in the pig iron temperature leads to a reduction in the slagging of vanadium under the same process conditions, since the "remaining" concentration of vanadium in the end metal is already 0.06 to 0.08% (on average 0 , 07%) is increased and the degree of slagging drops to 85%, that is to say 15% of the iron contained in pig iron nadin gets lost.
  • the invention has for its object to develop a process for the production of vanadium slag in the oxidation of vanadium-containing pig iron, in which it is possible to increase the yield of vanadium from pig iron and to increase the quality of the vanadium slag.
  • a vanadium slag is produced which contains mineralogical components such as spinellide, glass, pyroxenes and olivines, the vanadium, silicon, ManGan, titanium, iron, Grom, Calcium oxides and granules of metallic iron with carbon dissolved in them, and which, according to the invention, are characterized in that they have the following chemical composition, in% by mass: and the following mineralogical composition, in mass%: has, wherein the grains of spinelide have a regular shape and size of 25 to 80 microns.
  • a variant of the slag mixture according to the invention is the slag, which contains alkali metal oxides and carbon as constituents and has the following chemical composition, in% by mass:
  • the vanadium slag according to the invention is produced by a process which provides for pouring into a converter of vanadium slag, adding iron-containing and (or) flux components, blowing the pig iron with gaseous oxidizing agent to obtain an intermediate product or steel and slag and, according to the invention, is characterized in that that as a vanadium content Starting pig iron Pig iron of the following composition, in mass%: used and its blowing with an oxidizing agent, the throughput is 1.5 to 3.0 m 3 / t ⁇ min (converted to oxygen); blowing begins at a temperature of pig iron from 1180 to 1300 ° C and ends at 1400-1650 ° C; the specific area of the bath level is 0.13 to 0.3 m 2 / t.
  • vanadium slag For maintaining a basicity of the vanadium slag from 1.0 to 1.4, which is mainly for alloying with vanadium (directly from the slag) of cast iron, steels and alloys are used, 60-70% calcium-containing fluxes are introduced before pig iron blowing.
  • the intermediate product or the steel is blown through with an inert gas.
  • Vanadium slag of the above composition is made from vanadium pig iron by its oxidation with gaseous oxidizing agent. It was found that the composition of the slag mentioned is determined by the chemical composition of pig iron, which, according to the invention, has the following composition, in% by mass, as mentioned above:
  • Pig iron of this composition is smelted in conventional blast furnaces, which mostly have a small usable space (below 1000 m 3 ), with reference to the known peculiarities of the melting of titanium magnetites, which are caused by the formation ⁇ in the furnace hearth> of titanium oxycarbonitrides ⁇ >.
  • a reduction in the concentration of vanadium in pig iron below 0.35% reduces the concentration of vanadium oxide in the slag below 16% even with the lower limits of the other components, which makes processing into vanadium pentoxide more difficult.
  • An increase in the concentration of vanadium in pig iron above 0 , 90% is undesirable because at this concentration of vanadium the The resulting vanadium slag contains more than 30% vanadium oxide, reducing both the completeness of the slagging of vanadium and the completeness of the separation of the vanadium slag from the metal (as a result of thickening), which leads to an increase in vanadium losses.
  • the role of silicon and manganese dissolved in pig iron in the proposed amount is that in the oxidation they together with the iron oxides form a low-viscosity silicate component, which is necessary for the formation and the growth of the spinel-containing phase.
  • a concentration of silicon in pig iron of more than 0.35% is undesirable because the concentration of vanadium oxides drops below the required level of 16% when the concentration of silicon in pig iron is more than 0.35%.
  • Chromium and titanium contained in pig iron are completely converted into the complex spinellide in the stated range of concentrations by making it more chemically stable and high-melting.
  • the increase in the chemical resistance of complex spinellids contributes to more complete oxidation of vanadium in slag and to a reduction in losses in the separation of the slag from the metal, which increases the yield of vanadium.
  • the vanadium pig iron of the abovementioned composition is poured into a converter and blown through (oxidized) with a gaseous oxidizing agent, for example with oxygen at a throughput of 1.5 to 3.0 m 3 / t ⁇ min, at a temperature of pig iron at the beginning of the blowing of 1180 to 1300 ° C and at the end of the blowing from 1400 to 1650 ° C, and at a specific area of the bath level from 0.13 to 0.30 m 2 / t.
  • a gaseous oxidizing agent for example with oxygen at a throughput of 1.5 to 3.0 m 3 / t ⁇ min
  • the starting temperature of pig iron is also of great importance for the achievement of the task. Lowering the temperature to below 1180 ° C causes an undesirable considerable deterioration in the quality of the slag (enlargement of metal inclusions and iron oxides, reduction in the size of the spinellide grain). A rise in temperature to 1300 ° C leads to a significant increase in the intensity of carbon burnout immediately at the beginning of the blowing process, which slows down the oxidation of vanadium and reduces its degree of slagging.
  • the process according to the invention ensures an extremely high degree of slagging of vanadium (over 90%) at temperatures (1400-1650 ° C.), which are significantly higher than in the known processes, where the temperature with such slagging degree of vanadium in generally does not exceed 1350 ° C.
  • a slag-forming mixture which entails the waste from petroleum-containing petroleum types such as masut, magnetic fraction from vanadium slag and mill scale holds and has the composition as mentioned above.
  • the hydrocarbons contained in the mixture by reacting with blown oxygen, develop an additional amount of heat by increasing the metal temperature and accelerating the melting and the interaction of the molten mixture with the metal. This makes it possible to increase the consumption of iron ore materials, for example scale, and to increase the degree of transition from vanadium from pig iron to commercially available slag.
  • the magnetic fraction of the vanadium slag which is introduced into the mixture and which is produced during the preparation (mechanical comminution, grinding and magnetic separation) of the vanadium slag for oxidizing roasting when pentoxide is produced also contributes to increasing these indicators. It represents metallic granules from 0.1 to 20 mm in size, on the surface of which are difficult to separate "burnt-in" particles of vanadium slag. Depending on the size of the granules, the degree of slagging of the granules is 20 to 50%.
  • the uniform chemical composition of the magnetic fraction of the vanadium slag, in mass% is as follows: 50 to 80 Fe metal ; 2 to 6 V 2 O 5 ; 1 to 3 MnO; 2 to 8 SiO 2 ; 1 to 3 Ti0 2 ; 5 to 20 Fe (in oxides); 0.03 to 0.05 P; 0.02 to 0.03 S; 0.1 to 2.0 C.
  • the use of the magnetic fraction mentioned creates also the following advantages. As a result of its greater density (than in the case of scale), it contributes to the more intensive stirring of the slag-forming mixture into the metal when it is blown.
  • the amount of magnetic fraction in vanadium slag in the mixture is limited by the time it is dissolved. With a content of more than 20%, it remains in the slag that forms, which means that its quality deteriorates. With a content of less than 5%, their presence in the mixture is almost inappropriate.
  • a further increase in the slag quality in particular to decrease its macro and micro inhomogeneity and to increase the concentration of vanadium oxides and reduce the consumption of molten pig iron
  • Vanadium pig iron of the following composition, in mass%, is poured into a converter: 4.2-4.4 C; 0.10-0.20 Si; 0.40-0.60 V; 0.10-0.20 Ti; 0.10-020 Mn; 0.05-0.15 Cr; 0.03-0.06 P; 0.02-0.043 S; 0.08-0.12 Cu; 0.08-0.12 Ni; 0.001 to 0.12 Co.
  • the amount of pig iron cast is intended to obtaining a specific Fl ä- surface of the bath level in a range of 0.15 to 0.25 m 2 / t guarantee.
  • the temperature of pig iron after pouring it into the converter is 1270 to 1280 ° C.
  • the blowing is stopped and the metal contains at a temperature of 1420 to 1470 ° C., in mass%: 2.4-2, 8 G; Si traces; Ti traces; 0.02-0.04 V; 0.03-0.06 P; 0.02-0.04 S; 0.08-0.12 Cu; 0.08-0.12 Ni; 0.001-0.11 Co.
  • the metal intermediate obtained is poured into a pan through the drain opening and the vanadium slag is left in the converter.
  • the cycle repeats, and after the oxygen inflation is complete, the slag is blown with argon or other inert gas from above or below for 1.0-2.0 minutes.
  • the metal contains, in% by mass: 2.0-2.4 C; 0.03-0.04 V; 0.02-0.06 P; 0.02-0.035 S and has one Temperature from 1420 to 1450 ° C.
  • the vanadium slag produced after pouring the metal, which is stored by two smeltings, contains. in mass%: and has the following mineralogical composition, in mass%:
  • the vanadium spinellide grains crystallize in the form of regular geometric bodies, their size is 30 to 60 ⁇ m.
  • Pig iron of the same composition as described in variant I is blown with oxygen in the same converter.
  • the starting parameters were the same, except that before the pouring of pig iron into the converter, steel scrap in an amount of 40 to 50 kg / t of pig iron and after 20% (4-5 min) of the time of blowing off scale, in an amount from 50 to 60 kg / t was used.
  • the blowing is stopped and the metal, which has a temperature of 1600 to 1650 ° C, contains, in% by mass: 0.05-0.25 C; 0.01-0.03 V; 0.03-0.06 P; 0.02-0.03 p.
  • the metal produced is treated with slag-forming mixtures and cast or used for steel production in an SM furnace instead of the pig iron.
  • the slag produced according to this variant contains, in mass%: and has the following mineralogical composition, in mass%: the grains of vanadium spinallide, which have a regular geometric shape, have a size of 40 to d0 microns.
  • Vanadium slags, which are produced according to the variants mentioned, are successfully processed into vanadium pentoxide, whereby they ensure high indicators for the application of vanadium to finished products, while the known vanadium slags are significantly more difficult to process.
  • pig iron 84 t of pig iron were poured into a converter which, in mass%, contains: 3.8 C; 0.35 Si; 0.35 V; 0.07 Ti; 0.12 Mn; 0.03 Cr; 0.02 P; 0.04 Ni; 0.001 Co.
  • the pig iron temperature after pouring into the converter was 1300 ° C.
  • the converter was introduced in an amount of 40 kg / t slag-forming mixture (coolant) which, in Maase%, has: heavy hydrocarbons - 6 (2.4 kg / t), magnetic fraction of the vanadium slag - 20 (8 kg / t), Tinder - 74 (29.6 kg / t).
  • the flow rate of the oxygen to be inflated from the top was 3 m 3 / t ⁇ min, and the specific area of the liquid metal mirror was 0.3 m 3 / t.
  • the metal temperature was 1460 ° C, and the content thereof was in% by mass: 2.6 C; Si traces; 0.012 V; Ti traces; 0.01 Mn; Cr traces; 0.02 P; 0.04 Cu; 0.04 Ni; 0.001 Co.
  • the metal produced was poured into a pan and the slag was left entirely in the converter. Pig iron of the same composition and in the same amount was then poured into the converter. The consumption of coolant and oxygen remained the same.
  • the metal contained, in% by mass: 2.5 C; 0.018 V; Si traces; Ti traces; 0.01 Mn; Cr traces; 0.02 P; 0.0% Cu; 0.04 Ni; 0.001 Co and had a temperature of 1450 ° C.
  • the slag formed which had been stored by two melts, contained, in mass%: vanadium oxide - 16; Silicon oxide - 24; Manganese oxide - 6; chromium oxide - 1; Titanium oxide - 6; Calcium oxide - 0.3; Metallic iron granules - 8; Iron oxide - rest.
  • the degree of slagging of vanadium was 95%.
  • the degree of separation of the vanadium slag from the metal was 95%.
  • the output of vanadium from the pig iron in the slag is 90.2%.
  • vanadium pig iron 200 t was poured into a converter, which contains, in% by mass: 4.2 C; 0.21 Si; 0.46 V; 0.18 Ti; 0.22 Mn; 0.08 Cr; 0.06 P; 0.14 Cu; 0.16 Ni; 0.06 Co.
  • the temperature of the pig iron was 1280 ° C s.
  • slag-forming mixture in an amount of 50 kg / t, containing, in mass%, heavy hydrocarbons - 0.5 (0.25 kg / t), magnetic fraction of the vanadium slag - 5.0 (2.5 kg / t), mill scale - 94.5 (47.25 kg / t).
  • the flow rate of the oxygen supplied from above is 2 m 3 / t ⁇ min, and the specific area of the level of the liquid metal is equal to 0.13 m 3 / t.
  • the metal temperature was 1400 ° C and the vanadium and carbon content was 0.028 and 2.8%, respectively.
  • the metal produced was poured into a pan and the slag was left entirely in the converter for the next melting.
  • the slag produced, stored by two smeltings, contains, in mass%: vanadium oxide - 20.4; Silicon oxide - 14.2; Manganese oxide - 10.4; Cromoxide - 2.4; Titanium oxide - a, 6; Calcium oxide - 1.5; Metallic iron granules - 10.2; Iron oxide - rest.
  • the degree of slagging of vanadium is 94.3%.
  • the degree of separation of the vanadium slag from the metal is 93%, which means that the yield of vanadium from the pig iron in the slag is 87.5%.
  • the metal obtained was poured off and the slag was partially left in the converter for the next melting.
  • the degree of slagging of vanadium was 95%.
  • the degree of slag separation from the metal was 97%.
  • the output from the pig iron in the slag was 92%.
  • the temperature of the metal was 1410 ° C, and its content of vanadium and carbon was in mass%, 0.03 and 2.6, respectively.
  • the metal produced was poured off and the slag was left entirely in the converter for the next smelting.
  • the vanadium and carbon in the metal are at a level of 0.03 and 2.6%, respectively.
  • the vanadium slag stored from three melts, contained, in mass%: vanadium oxide - 16.6; Silicon oxide - 12; Manganese oxide - 10; chromium oxide - 12; Titanium oxide - 14; Alkali metal oxides - 1.5; Calcium oxide - 0.8; Carbon - 2.0; Granules of metal iron - 20; Iron oxide - rest.
  • a converter was poured with 162 t of vanadium pig iron, which contains, in% by mass: 0.52 V; 4.4 C; 0.14 Si; 0.18 Mn; 0.18 Ti; 0.03 Cr; 0.04 P; 0.12 Cu; 0.18 Ni; 0.005 Co.
  • the temperature of the Roheiseus in the converter was 1280 ° C.
  • the metal Upon completion of the blowing, the metal was 1470 ° C and the vanadium and carbon content in the metal was 0.03 and 2.2%, respectively, after the vanadium application was completed.
  • the metal was poured off and the slag was left entirely in the converter, after which the cycle was repeated with the same initial parameters.
  • the metal temperature in the second melting was 1480 ° C. with the same vanadium content.
  • the carbon content was reduced to 2.1%.
  • the slag collected after two smeltings contained, in mass%: vanadium oxide - 25.6; Silicon oxide - 14.1; Manganese oxide - 8.4; Titanium oxide - 8.5; chromium oxide - 1.4; Calcium oxide - 3.0; Alkali metal oxide - 2.1; Carbon 0.5; Granules of metal iron - 8.4; Iron oxide - rest.
  • the mineralogical composition of the slag produced is as follows, in% by mass: spinellide - 60; Glass - 4; Pyroxene and Olivine - 36.
  • Spinellid's grains were 40 to 60 ⁇ m in size. They form crystals in the form of regular geometric bodies.
  • the flow rate of the oxygen blown from above was 2.5 m 3 / t ⁇ min, and the specific area of the bath level was equal to 0.18 m 2 / t.
  • the metal contained 0.12% C and 0.01% V at a temperature of 1650 ° C.
  • the degree of slagging in this variant was 98%.
  • the slag contained, in% by mass: vanadium oxide-28.4; Silica-18.1; Manganese oxide 8.2; Titanium oxide-10.8; Cromoxide-2,3; Calcium oxide-1,4; Granules of metal iron - 3.2; iron oxide - rest.
  • the mineralogical composition of the slag remained the same, the grain of spinellide with extremely regular, distinct areas increased to 80 ⁇ m in size. After partially leaving the slag and repeating the operation with the same parameters, the slag content in the subsequent smelting remained practically the same as the former.
  • the flow rate of the oxygen supplied from above was 2.5 m 3 / t ⁇ min, and the specific area of the bath level was 0.20 m 2 / t.
  • the metal Upon completion of the blowing, the metal contained 0.62% C and 0.04% V at a temperature of 1580 ° C. The degree of slagging of vanadium was 92.4%.
  • the bottle contained, in% by mass: vanadium oxide 27.8; Silicon oxide 17.4; Manganese oxide 8.0; Titanium oxide 9.2; chromium oxide 3.1; Calcium oxide 1.6; Granules of metal iron 3.6; Iron oxide residue.
  • the mineralogical composition of the slag remained the same, the size of the spiaellide grain of a regular shape was 60-80 ⁇ m.
  • the slag contains, in% by mass: 20.2 vanadium oxide; 18.1 calcium oxide; 17.9 silicon oxide; Granules of metal iron - 2.0; Ti, Cr, Fe-oxide - rest.
  • vanadium base coats with a basicity of 1.4 is ensured by adding 1.6 t of lime (70% of the total consumption per smelting) together with scrap.
  • a slag is obtained which, in% by mass, contains: 18.2 vanadioxide; 30 calcium oxide; 15 silicon oxide; 10 manganese oxide; 2.1 chromium oxide; 9.6 titanium oxide; 2.0 granules of metal iron; . Rest - iron oxide.
  • the degree of fouling of vanadium is -92.5% at the end of the process and at a temperature of 1600 ° C.
  • the basicity of the slag was 1.2 with the following ratio of the components in the slag, in mass%: 30 calcium oxide; 25 silicon oxide; 17.4 vanadium oxide; 18.4 Mn, Cr and Ti oxides; 2.0 granules of iron; Iron oxide - rest.
  • the metal has a temperature of 1620 ° C and contains 0.44% C, 0.04% V, 0.028% P.
  • the vanadium slag was, in% by mass: 24.8 vanadium oxide; 14.2 silicon oxide; 3.6 granules of iron; 6.2 calcium oxide; 24.2 iron oxide; the rest is formed by Mn, Cr, Ti oxides.
  • the slag contained, in% by mass: 26.8 vanadium oxide; 14.1 silicon oxide; 3.8 granules of iron; 6.4 calcium oxide; 18.6 iron oxide; Mn, Cr, Ti-oxide - rest.
  • the degree of slagging of vanadium was 89.5%.
  • the present invention can be used in the field of black metallurgy in the processing of titanium magnetite ores by the metallurgical route with the discharge of iron and vanadium.
  • the vanadium-containing blast furnace iron produced in this titanium magnetite processing scheme is subjected to oxidative blowing in converters to produce vanadium slag of the required chemical, mineralogical and granulometric compositions.
  • the method according to the invention makes it possible to improve the quality of the vanadium slag, which cannot only be used for the production of vanadium pentoxide, but also as an alloy component for the direct alloying of cast iron, steel and alloys with vanadium.
  • the process is simple in terms of equipment design and can be successfully used in existing converter halls that process pig iron containing vanadium.

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Abstract

Le laitier de vanadium renferme les composés suivants exprimés en pourcentage en poids: oxyde de vanadium de 16 à 30, oxyde de silicium de 10 à 24, oxyde de manganèse de 6 à 14, oxyde de chrome de 1 à 12, oxyde de titane de 6 à 14, oxyde de calcium 0,3 à 30,0, fer métallique de 2 à 20, l'oxyde de fer constituant le solde. Le laitier possède la composition minérale suivante, exprimée en pourcentage en poids: spinélide de 40 à 70, verre de 2 à 10, pyroxènes et olivines constituant le solde. Les grains de spinélide ont une forme géométrique régulière et mesurent de 25 à 80 mum. Le procédé pour l'obtention du laitier de vanadium ayant la composition citée prévoit l'utilisation de fonte au vanadium contenant, en pourcentage en poids: vanadium de 0,35 à 0,90, carbone 3,8 à 4,8, silicium 0,05 à 0,35, manganèse 0,12 à 0,35, titane 0,07 à 0,38, chrome 0,03 à 0,42, phosphore 0,02 à 0,10, cuivre 0,04 à 0,32, nickel 0,04 à 0,32, cobalt 0,001 à 0,12, le solde étant constitué de fer. La fonte citée ci-dessus est soufflée avec un oxydant gazeux, comme par exemple l'oxygène, à une intensité de soufflage de 1,5 à 3,0 m3/t.min, à une température de la fonte au début du soufflage comprise entre 1180 à 1300oC et en fin de soufflage entre 1400 et 1650oC et avec une superficie spécifique de la surface de la coulée de 0,13 à 0,30 m2/t.
EP19860900680 1985-08-22 1985-08-22 Procede pour l'obtention de laitier de vanadium Expired - Lifetime EP0235291B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1985/000072 WO1987001136A1 (fr) 1985-08-22 1985-08-22 Laitier de vanadium et procede pour l'obtention de celui-ci

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EP0235291A1 true EP0235291A1 (fr) 1987-09-09
EP0235291A4 EP0235291A4 (fr) 1988-01-20
EP0235291B1 EP0235291B1 (fr) 1990-02-07

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EP (1) EP0235291B1 (fr)
JP (1) JPS63500873A (fr)
DE (1) DE3575949D1 (fr)
WO (1) WO1987001136A1 (fr)

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WO1998004750A1 (fr) * 1996-07-24 1998-02-05 'holderbank' Financiere Glarus Ag Procede de separation de titane ou vanadium contenus dans de la fonte brute
KR20020057680A (ko) * 2001-01-03 2002-07-12 최한천 오산화 바나듐 브리케트 제조방법
RU2202626C2 (ru) * 2001-07-23 2003-04-20 Открытое акционерное общество "Северсталь" Способ выплавки стали в конвертере
RU2442827C2 (ru) * 2010-01-11 2012-02-20 Открытое акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат" (ОАО "ЕВРАЗ НТМК") Способ извлечения ванадия при конвертерном переделе природно-легированного чугуна

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RU2142017C1 (ru) * 1998-02-23 1999-11-27 ОАО "Нижнетагильский металлургический комбинат" Способ выплавки стали в конвертере
RU2131466C1 (ru) * 1998-03-25 1999-06-10 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Способ получения ванадийсодержащего шлака при переработке ванадиевого чугуна монопроцессом
RU2136764C1 (ru) * 1998-07-29 1999-09-10 Открытое акционерное общество Нижнетагильский металлургический комбинат Способ передела ванадиевого чугуна в конвертере
RU2140458C1 (ru) * 1998-08-25 1999-10-27 Открытое акционерное общество Нижнетагильский металлургический комбинат Способ передела ванадиевого чугуна
RU2145356C1 (ru) * 1998-11-10 2000-02-10 ОАО "Нижнетагильский металлургический комбинат" Способ конвертерной плавки с использованием металлизованных материалов
RU2148654C1 (ru) * 1998-11-16 2000-05-10 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Комплексный флюс для деванадации чугуна
RU2147038C1 (ru) * 1998-12-30 2000-03-27 ОАО "Нижнетагильский металлургический комбинат" Способ получения ванадийсодержащего шлака
RU2148088C1 (ru) * 1999-03-01 2000-04-27 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Способ передела ванадиевого чугуна ником-процессом
RU2157414C1 (ru) * 1999-07-07 2000-10-10 ОАО "Нижнетагильский металлургический комбинат" Способ передела ванадиевых чугунов в сталеплавильных агрегатах
RU2186124C2 (ru) * 2000-06-29 2002-07-27 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Способ передела чугуна
RU2186125C2 (ru) * 2000-08-02 2002-07-27 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Способ выплавки низкоуглеродистой ванадийсодержащей стали повышенной прочности и хладостойкости
RU2194079C2 (ru) * 2000-11-15 2002-12-10 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Способ выплавки стали в конвертере
DE102007001098A1 (de) * 2007-01-04 2008-07-10 Sms Demag Ag Verfahren und Anlage zur Erzeugung von Stahl
RU2465338C2 (ru) * 2010-08-24 2012-10-27 Открытое акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат" (ОАО "ЕВРАЗ НТМК") Способ повышения степени извлечения ванадия при конвертировании природно-легированных чугунов
RU2656125C2 (ru) * 2016-05-04 2018-06-01 Акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат", (АО "ЕВРАЗ НТМК") Способ получения твердого чугуна
RU2641436C1 (ru) * 2016-10-06 2018-01-17 Открытое акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат", ОАО "ЕВРАЗ НТМК" Способ извлечения ванадия из природнолегированного ванадиевого чугуна

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998004750A1 (fr) * 1996-07-24 1998-02-05 'holderbank' Financiere Glarus Ag Procede de separation de titane ou vanadium contenus dans de la fonte brute
CN1068058C (zh) * 1996-07-24 2001-07-04 “霍尔德班克”财务格拉鲁斯公司 从生铁中分离钛和/或钒的方法
KR20020057680A (ko) * 2001-01-03 2002-07-12 최한천 오산화 바나듐 브리케트 제조방법
RU2202626C2 (ru) * 2001-07-23 2003-04-20 Открытое акционерное общество "Северсталь" Способ выплавки стали в конвертере
RU2442827C2 (ru) * 2010-01-11 2012-02-20 Открытое акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат" (ОАО "ЕВРАЗ НТМК") Способ извлечения ванадия при конвертерном переделе природно-легированного чугуна

Also Published As

Publication number Publication date
EP0235291A4 (fr) 1988-01-20
EP0235291B1 (fr) 1990-02-07
JPS63500873A (ja) 1988-03-31
WO1987001136A1 (fr) 1987-02-26
DE3575949D1 (de) 1990-03-15

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