EP3456849B1 - Tuyère de vent chaud pour injection laterale et inférieure et procédé pour son refroidissement - Google Patents

Tuyère de vent chaud pour injection laterale et inférieure et procédé pour son refroidissement Download PDF

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Publication number
EP3456849B1
EP3456849B1 EP18182891.4A EP18182891A EP3456849B1 EP 3456849 B1 EP3456849 B1 EP 3456849B1 EP 18182891 A EP18182891 A EP 18182891A EP 3456849 B1 EP3456849 B1 EP 3456849B1
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EP
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Prior art keywords
tuyere
headpiece
nose
ceramometal
cooling
Prior art date
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EP18182891.4A
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German (de)
English (en)
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EP3456849A1 (fr
EP3456849B8 (fr
Inventor
Nikolai Mikhailovich BARSUKOV
Konstantin Valerievich BULATOV
Andrey Faritovich Ibragimov
Ilfat Ildusovich ISKHAKOV
Sergei Aleksandrovich LEPIN
Artem Nikolaevich Ruzanov
Aleksandr Nikolaevich Kirichenko
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OBSCHESTVO S OGRANICHENNOI OTVETSTVENNOSTYU "MEDNOGORSKY MEDNO-SERNY KOMBINAT"
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Obschestvo S Ogranichennoi Otvetstvennostyu "mednogorsky Medno-Serny Kombinat"
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C21B7/163—Blowpipe assembly
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements

Definitions

  • the group of inventions relates to metallurgy and more particularly to devices for blowing oxidizing blast through molten copper sulfide or polymetallic raw material and methods for cooling these devices, and can be used in nonferrous and ferrous metallurgy.
  • Inventor's Certificate SU 1667920 and patent RU 2152441 disclose the use of tuyeres with coaxial pipes (tuyere with a protective envelope shell) to reduce the heat impact on the tuyere nose (end). Oxidizing blast is fed through a main passage, and a weakly oxidizing, inert or reducing blast is fed through a protective passage.
  • the tuyere with a protective shell reduces the rate of heat impact on the surface of the tuyere nose, but does not protect it from burnout.
  • Headpieces can be used to protect the tuyere end face from burnout, as described in patent RU 2235789 . End face headpieces protect the tuyere nose for a certain period of time.
  • low thermal conductivity of the headpiece prevents forming a stable skull layer on the headpiece, thereby leading to burnout of the headpiece and the tuyere nose surface.
  • Cooling passages are formed by a filled pipe, and the cooling intensity is attained by the use, in the nose, of a coil with a specified section of the cooling passage.
  • the main cooling intensity characteristic is
  • the coolant velocity i.e. the flow rate of coolant
  • maintenance of the specified flow rate at the proper level i.e. the flow rate of coolant
  • the nose wall cannot be kept integral under heat strains of >1000 kW/m 2 .
  • patent US 5,989,488 which uses cooling the tuyere end face for its protection.
  • DE 10 2009 048 351 A1 relates to a tuyere where a tube insert used for blowing a gas into molten metal can, inter alia, be made of Al 2 O 3 .
  • GB 518,921 and FR 2 549 489 A1 are further prior art.
  • the unregulated flow rate of coolant per the nose surface area cannot protect it when the blast flame hangs near the tuyere surface; this leads to the tuyere surface burnout despite the fact that the nose surface is protected by a ceramic insert.
  • the object of the present group of inventions is to provide a tuyere for bottom and side blowing an oxidizing blast through a molten copper sulfide in a protective shell under high heat strains in the blast flame region, and enable long operation of the tuyere.
  • the group of inventions offers higher service characteristics of a tuyere for bottom and side blowing, including, inter alia, enhanced reliability and longer service of the tuyere, improved efficiency of cooling the tuyere under high heat strains.
  • the object is further attained by a method for cooling a tuyere, comprising cooling the tuyere nose at the coolant flow rate of at least 25 ⁇ 10 -3 m 3 /s per 1 m 2 of the surface area of the nose, and maintaining negative pressure within the cooled elements.
  • the present group of inventions provides a tuyere, cooled from an explosion-proof cooling system, with a protective envelope of air or another blast, and the end face (nose) of the tuyere and the coaxial pipes is protected by a headpiece contacting the molten material, which is explosive in reaction with water.
  • a tuyere for bottom and side blowing comprises a tuyere body 1 with a cooling passage 2, a main blast pipe 3, a protective blast pipe 4, a tuyere nose 5, a cooled element 6 and a ceramometal headpiece 7.
  • the main blast pipe 3 and the protective blast pipe 4 are arranged coaxially with respect to each other.
  • the cooling element 6 is formed by filled pipes or a slit-like passage.
  • the ceramometal headpiece 7 is arranged on the tuyere nose 5 to protect the surface of the tuyere nose 5 and the spout of pipes 3, 4, and is made of a material having an average thermal conductivity of at least 30 W/m°C and a phase transition latent heat of at least 1000 kJ/kg.
  • the ceramometal headpiece 7 is made of layers of different materials: those having a low thermal conductivity and a high melting point, and those having a high thermal conductivity and a melting point of about 1100°C.
  • Thermal conductivity of the ceramometal headpiece is determined as the average of the sum of products of mass fraction of the layer by thermal conductivity for cross-section of the ceramometal headpiece.
  • Phase transition heat or latent melting heat is determined for a particular ceramometal headpiece.
  • thermocouples are caulked into its working surface on the side of molten sulfide.
  • Temperature of 960° C, equivalent to the skull melting temperature, is taken for the instant of melting the protective skull.
  • the coefficient of heat transfer from the cooled element wall to the coolant was about 3700 kW/m 2 °C.
  • the method is implemented in the following manner.
  • the tuyere is installed in the molten sulfide zone. Oxygen for main blast is fed though the main blast pipe 3, and air is fed through the protective blast pipe 4. Skull layer forms on the surface of the ceramometal headpiece 7, which protects the headpiece 7 and the tuyere from wear. Water coolant is supplied on the surface of the tuyere nose 5, and a negative pressure is created in the cavity of the cooled element 6. Negative pressure is provided by installing the tuyere in a certain place of the explosion-proof cooling system.
  • Performance of the tuyere was tested on "Noranda" system.
  • the tuyere was installed in the tuyere belt and in the bottom of the system. Surface of the headpiece was in contact with molten copper sulfide. A layer of protective skull formed on the surface of the tuyere headpiece. Main oxygen blast was fed through the central passage. Air blast was fed through the protective shell. Tuyeres in the bottom and side part of the system were operated for a long time. No wear and overheating of tuyere occurred, which was confirmed by determined parameters of the tuyere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (3)

  1. Tuyère pour injection latérale et inférieure, dans laquelle la tuyère comprend un corps de tuyère (1) ayant un passage (2), un tuyau de soufflage principal (3), un tuyau de soufflage protecteur (4), un nez de tuyère (5), un élément refroidi (6) et une pièce de tête en céramométal (7), dans laquelle le tuyau de soufflage principal (3) et le tuyau de soufflage protecteur (4) sont disposés coaxialement l'un par rapport à l'autre, la pièce de tête en céramométal (7) est disposée sur le nez de tuyère (5) et est constituée d'un matériau ayant une conductivité thermique moyenne d'au moins 30W/m°C et une chaleur latente de transition de phase d'au moins 1000 kJ/kg, la pièce de tête en céramométal (7) étant constituée de couches de matériaux différents de ceux ayant une faible conductivité thermique et un point de fusion élevé, et ceux ayant une conductivité thermique élevée et un point de fusion d'environ 1100 °C.
  2. Tuyère selon la revendication 1, caractérisée en ce que la longueur de la pièce de tête en céramométal (7) est déterminée par la formule : L = 0,862 ⋅ P o 2 − 0.992 ,
    Figure imgb0005
     où L est la longueur de la pièce de tête (7), en millimètres, Po2 est la pression partielle d'oxygène du soufflage principal, en MPa.
  3. Procédé de refroidissement d'une tuyère selon la revendication 1, caractérisé en ce que le procédé consiste à refroidir le nez de tuyère à un débit de réfrigérant d'au moins 25·10-3 m3/s pour 1 m2 de la surface du nez, et maintenir une pression négative à l'intérieur des éléments refroidis.
EP18182891.4A 2017-09-15 2018-07-11 Tuyère de vent chaud pour injection laterale et inférieure et procédé pour son refroidissement Active EP3456849B8 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2017132288A RU2676382C1 (ru) 2017-09-15 2017-09-15 Фурма для донной и боковой продувки

Publications (3)

Publication Number Publication Date
EP3456849A1 EP3456849A1 (fr) 2019-03-20
EP3456849B1 true EP3456849B1 (fr) 2020-06-17
EP3456849B8 EP3456849B8 (fr) 2020-08-12

Family

ID=63047107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18182891.4A Active EP3456849B8 (fr) 2017-09-15 2018-07-11 Tuyère de vent chaud pour injection laterale et inférieure et procédé pour son refroidissement

Country Status (5)

Country Link
EP (1) EP3456849B8 (fr)
AU (1) AU2018204745A1 (fr)
CL (1) CL2018002526A1 (fr)
EA (1) EA038247B1 (fr)
RU (1) RU2676382C1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB518921A (en) * 1937-08-28 1940-03-12 Freyn Engineering Co Improvements in tuyeres
FR2549489B1 (fr) * 1983-07-18 1989-10-06 Sacilor Tuyere a vent, a economie et repartition d'energie, pour haut fourneau et autres fours a cuve
US4572487A (en) * 1984-05-10 1986-02-25 Inland Steel Company Blast furnace tuyere with replaceable liner
SU1245600A1 (ru) * 1985-02-13 1986-07-23 Днепровский металлургический комбинат им.Ф.Э.Дзержинского Фурма дл донной продувки металлического расплава
SU1350178A1 (ru) * 1986-03-04 1987-11-07 Сибирский металлургический институт им.Серго Орджоникидзе Фурма дл донной продувки металла
SU1667920A1 (ru) 1988-12-13 1991-08-07 Научно-Производственное Объединение "Техэнергохимпром" Конвертер газа
RU2084540C1 (ru) * 1995-03-22 1997-07-20 Государственный научно-исследовательский институт цветных металлов "Гинцветмет" Охлаждаемая фурма для продувки жидкого расплава
RU2152441C1 (ru) 1998-01-06 2000-07-10 Акционерное общество "Кузнецкий металлургический комбинат" Устройство для донной продувки стали в ковше
JPH11217611A (ja) 1998-01-30 1999-08-10 Kobe Steel Ltd 溶鉱炉送風羽口
RU2167204C1 (ru) * 1999-12-31 2001-05-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Дутьевая фурма доменной печи
UA49411C2 (en) 2001-12-03 2005-01-17 Oleksandr Heiniiovyc Manshylin A blast furnace blowing tuyere and a method of protecting covering applying on the blast furnace blowing tuyere
RU2299243C1 (ru) * 2006-01-10 2007-05-20 Общество с ограниченной ответственностью "Научно-производственное предприятие "ЦветЛитФурма"(ООО"НПП"ЦветЛитФурма") Фурма доменной печи
AT507595B1 (de) * 2008-11-28 2011-03-15 Siemens Vai Metals Tech Gmbh Düse zum eindüsen von sauerstoffhaltigem gas in ein roheisenaggregat mit kantenschutz durch auswechselbares einsatzstück

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3456849A1 (fr) 2019-03-20
EA038247B1 (ru) 2021-07-29
EA201891232A1 (ru) 2019-03-29
AU2018204745A1 (en) 2019-04-04
EP3456849B8 (fr) 2020-08-12
CL2018002526A1 (es) 2019-02-01
RU2676382C1 (ru) 2018-12-28

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