US3231254A - Apparatus for handling and mixing blast furnace gaseous materials - Google Patents

Apparatus for handling and mixing blast furnace gaseous materials Download PDF

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Publication number
US3231254A
US3231254A US71772A US7177260A US3231254A US 3231254 A US3231254 A US 3231254A US 71772 A US71772 A US 71772A US 7177260 A US7177260 A US 7177260A US 3231254 A US3231254 A US 3231254A
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Prior art keywords
recess
furnace
blast furnace
handling
mixing
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US71772A
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English (en)
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Raick Julien Oscar
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents

Definitions

  • the double intervention process of Raick involves introduction of gases at desired temperatures and pressures into the furnace shaft or ascending gas stream at two levels.
  • the lower introduction is at the blast admission level.
  • the higher introduction is at the critical zone level, hereinafter defined.
  • This present invention is directed to a new and improved means for handling, mixing and injecting the materials and gases at the higher or critical zone level.
  • Oxygen-reformed hydrocarbon material is hydrocarbon material which has been reformed by the combined cracking and partial oxidation of the carbon content to produce CO and H with substantially no CO and H 0.
  • the circumferential recess in the internal wall of the bosh portion of the blast furnace provides a location sheltered from the column or shaft of ascending gases and descending burden.
  • the hydrocarbon material and industrially pure oxygen are discharged through conduits into this recess where reformation and the desired temperature rise takes place immediately.
  • the conventionally constructed blast furnace would normally be adapted for a recess by removal of a volume of the refactory brick sufficiently large to permit continuous mixing and reformation of the material and gas volume required to maintain the continuous balanced operation of the furnace while employing Raicks double intervention process.
  • the recess could be constructed by any modification of the furnace as would occur to the man skilled in the art.
  • the recess In addition to performing the 2 function of a mixing and reformation space the recess also allows a loosening and expansion of the descending burden materials which promotes and improves the penetration of the reformed gases into the shaft column.
  • the burden deflector like the recess extends around the inside of the furnace wall positioned above the recess.
  • the deflector may be made of carbon or any suitable refractory material.
  • the deflector supplements the function of the recess in providing a burden free space where mixing and reformation can be accomplished.
  • the deflector is a desirable but not requisite element of the present invention since at reduced operating capacities a burden free space can be created without a deflector.
  • Bustle pipes and conduits provide hydrocarbon material and oxygen to the recess. Where mixing is accomplished in the recess, the conduits may be arranged with discharge ends at equal elevation, one over the other or one concentrically disposed in the other.
  • One of these or a similar arrangement as will suggest itself, will serve to facilitate introductory mixing depending on the particular dimensions of the recess and other furnace characteristics.
  • FIG. 1 is an elevation sectional view of a blast furnace wall at the bosh and critical zone:
  • FIG. 2 and FIG. 3 show end views of alternative additional conduit pair positions.
  • FIG. 1 shows portions of the furnace wall refractory brick 8 removed (see dotted profile line 9) and a suitable high temperature refractory material 1 positioned in and extending out from the bosh portion of the brick refractory Wall as modified.
  • This contour of this high temperature refractory creates a recess 2.
  • Two conduits 10 and 11 have equally elevated discharge ends 5, as shown in partial auxiliary view, positioned in the recess 2.
  • Conduit 10 is connected to circumferential bustle pipe 3 which supplies hydrocarbon fuel.
  • Conduit 11 is connected to bustle pipe 4 which supplied industially pure oxygen.
  • Valves 12 and 13 are located in the intake ends of conduits 10 and 11.
  • Blast level tuyere 7 is connected to a ring main or bustle pipe 6.
  • Structural member 14 supports through plate 15 the wall adjacent the stock section of the furnace 16. Cooling vents 1l7 reduce the temperature of the refractory materials 8.
  • FIG. 2 an alternative position of the conduits is shown at 10' and 11'.
  • the end elevation view shows discharge ends 5' and 6.
  • FIG. 3 another alternative position of the conduits is shown as 10 and 11".
  • the end elevation view shows discharge ends 5" and 6".
  • critical zone refers to that zone of the furnace in which the average temperature of the descending materials lies between about 1150 C. and about 1400 C.
  • a substantially circumferential recess or suflicient gas handling and mixing volume in the bosh portion of the furnace and at least one pair of conduits with discharge ends positioned in said recess.
  • fluid handling and mixing means comprising an internal substantially circumferential recess in the refractory lining of the bosh, said recess having its height approximately equal to its depth, and internal substantially circumferential burden deflector positioned adjacent to and above said recess, said deflector projecting in the furnace shaft a distance not greater than the depth of said recess, at least one pair of conduits a with intake ends connected to circumferential bustle pipes and discharge ends positioned at equal elevation in said recess.
  • fluid handling and mixing means comprising an internal substantially circumferential recess in the refractory lining of the bosh, said recess having its height approximately equal to its depth, at least one pair of conduits with intake ends connected to circurriferential bustle pipes and discharge ends positioned at equal elevation in said recess.
  • a blast furnace of conventional construction including a continuous internal furnace wall formed by the hearth, bosh and stack, means for gaseous material handling and mixing comprising an internal substantially circumferential furnace wall recess of suflicient volume for adequate gas handling and mixing in the bosh portion of the furnace, an internal substantially circumferential burden deflector positioned adjacent to and above said recess and at least one pair of conduits with discharge ends positioned in said recess.
  • a blast furnace in accordance with claim 4 having an internal refractory lining in which the furnace Wall recess is formed in said refractory lining and in which the burden deflector is positioned on said refractory lining.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Manufacture Of Iron (AREA)
US71772A 1959-11-24 1960-11-25 Apparatus for handling and mixing blast furnace gaseous materials Expired - Lifetime US3231254A (en)

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BE464005 1959-11-24

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AT (1) AT258328B (en))
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GB (1) GB945312A (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114395653A (zh) * 2022-01-27 2022-04-26 江苏省沙钢钢铁研究院有限公司 高炉边缘气流稳定性的控制方法
CN115943219A (zh) * 2020-09-15 2023-04-07 安赛乐米塔尔公司 用于炼铁生产的高炉

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837840A (en) * 1971-10-12 1974-09-24 Metallurg Ct Voor Res Centre R Shaft furnace operation with a double fuel injection

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US502482A (en) * 1893-08-01 August dauber
US972126A (en) * 1908-03-07 1910-10-04 Mary Owen Munson Continuous-twyer furnace.
US1448340A (en) * 1917-08-21 1923-03-13 Chemical Foundation Inc Process and furnace for reducing and roasting ores
FR586015A (fr) * 1923-11-23 1925-03-13 Ile Des Brevets Joullie Soc Ci Dispositif d'injection de combustible d'un haut fourneau et autres appareils métaliurgiques
US1850009A (en) * 1928-05-23 1932-03-15 Gronwall Eugen Assar Alexis Reduction of metals out of their ores
US2010073A (en) * 1930-11-18 1935-08-06 American Oxythermic Corp Blast furnace
US2790711A (en) * 1957-04-30 Molten
US2833643A (en) * 1956-04-19 1958-05-06 Louis L Newman Apparatus for and method of reducing ore
US2859106A (en) * 1952-09-17 1958-11-04 Antonsen Randolph Process and apparatus for removing sulfur from iron

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US502482A (en) * 1893-08-01 August dauber
US2790711A (en) * 1957-04-30 Molten
US972126A (en) * 1908-03-07 1910-10-04 Mary Owen Munson Continuous-twyer furnace.
US1448340A (en) * 1917-08-21 1923-03-13 Chemical Foundation Inc Process and furnace for reducing and roasting ores
FR586015A (fr) * 1923-11-23 1925-03-13 Ile Des Brevets Joullie Soc Ci Dispositif d'injection de combustible d'un haut fourneau et autres appareils métaliurgiques
US1850009A (en) * 1928-05-23 1932-03-15 Gronwall Eugen Assar Alexis Reduction of metals out of their ores
US2010073A (en) * 1930-11-18 1935-08-06 American Oxythermic Corp Blast furnace
US2859106A (en) * 1952-09-17 1958-11-04 Antonsen Randolph Process and apparatus for removing sulfur from iron
US2833643A (en) * 1956-04-19 1958-05-06 Louis L Newman Apparatus for and method of reducing ore

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115943219A (zh) * 2020-09-15 2023-04-07 安赛乐米塔尔公司 用于炼铁生产的高炉
JP2023540644A (ja) * 2020-09-15 2023-09-25 アルセロールミタル 製鉄生産用高炉
CN114395653A (zh) * 2022-01-27 2022-04-26 江苏省沙钢钢铁研究院有限公司 高炉边缘气流稳定性的控制方法
CN114395653B (zh) * 2022-01-27 2022-10-21 江苏省沙钢钢铁研究院有限公司 高炉边缘气流稳定性的控制方法

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GB945312A (en) 1963-12-23
BE584983A (en))
AT258328B (de) 1967-11-27

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