• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This invention relates to the injection of solid finely ground, preferably powdered, materials into a cement kiln. The aim of the invention is to increase the service life of the device and reduce energy costs. The lance 1 contains a substantially cylindrical or slightly convergent conical outlet 4 and a diverging conical inlet 6. A plasma torch 8 is placed coaxially with the lance 1 at the entrance to the inlet 6. Injectors 10 are inclined to open into the inlet 6 of the lance. In this case, the taper of the entrance part is close to the angle of the natural expansion of the plasma jet, so that the plasma jet entrains the materials, and some of the materials are thrown onto the inner wall of the tuyere, thereby providing self-lining. 2 hp f-ly, 1 ill.
    公开号:SU1473715A3
    申请号:SU864027425
    申请日:1986-05-05
    公开日:1989-04-15
    发明作者:Де Ласса Де Прессини Ианн；Шнейдер Мишель；Занетта Югес
    申请人:Энститю Де Решерш Де Ля Сидерюржи Франсэз (Ирсид) (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a device for the injection of solid finely ground, preferably powdery, materials into a furnace, in particular a blast furnace.
    The purpose of the invention is to increase the service life of the device and reduce energy costs.
    The drawing shows a device, General view.
    The device contains a lance I, which opens into the reaction zone 2 of the blast furnace (shown only facing 3 blast furnaces). Inside the lance 1 „there is an outlet almost cylindrical part 4 with an axis 5, in front of which there is an inlet part 6 in the form of a section of a cone diverging from the same axis 5, The inner lance of the lance is cooled using known means (for example, water circulation) / shown by dashed line 7 .
    Coaxial with lance 1 located. a plasma torch 8, while its output electrode 9 abuts against a spherical surface behind the tuyere 1 so that the plasma jet exits directly into the conical part 6 of the tuyere. The taper of this part is almost equal to the natural angle of expansion of the plasma jet (about 11 °). If the taper is less than the specified angle, then the peripheral velocities of the plasma flow turn out to be too large and material does not deposit on the desired wall. If the taper significantly exceeds the specified angle, gas recirculation zones arise around the plasma jet, which, due to rarefaction, can carry liquid cast iron into the tuyere, which communicates with the blast furnace.
    The tuyere nozzles 10 obliquely open. Into the conical part of the tuyere 6 and are connected to a power source of powdered materials (for example, iron oxides) and to a carrier gas source. Injected powdery material meets a plasma jet in a zone of very high temperature (more than 4000 ° C).
    The powdery material goes into a liquid state, and a plasma jet carries most of it into the reaction zone of the blast furnace. However, some part of the material tends to precipitate on the cooled inner wall of the lance, which is additionally facilitated by the effect of the rotation of the plasma jet (the presence of a vortex). As a result, a layer 11 forms on the inner wall of the lance 1, the thickness of which is self-regulating, since the excess substance is melted and carried away by the plasma jet. So that the injected substance can reliably settle on the wall, do not feed it too deep into the plasma jet. Therefore, it is desirable that the holes for feeding materials into the tuyere go out onto its surface as shown in the drawing.
    To improve the self-lining of the inner wall of the lance on it, it is possible to provide a zone of engagement with refractory notches, as well as to make the output part 4 of the lance in the form of a slightly converging cone.
    The output 4 and input 6 of the tuyere can be made from several parts, or in the form of a single part.
    The invention can also be used for injection of solid finely ground materials, regardless of their nature (metal oxides, carbon substances such as coal, coke, etc.) or their condition (dry or wet powder or pulp, for example, mineral-water or carbon-water etc.) ..
    The nozzle 10 can be embedded deeper into the lance, however, at the first start-up, the protruding part, which is exposed to the plasma jet, quickly disappears, melting, and the injected materials begin to be supplied to. wall surface level.
    权利要求:
    Claims (3)
    [1]
    Claim
    1. A device for injecting solid finely ground materials into a blast furnace containing a lance with at least one nozzle for injecting solid finely ground materials, a plasma torch installed coaxially with a prism, the outlet of the inner channel of which has a cylindrical section, characterized in that, in order to increase the service life of the device and reduce energy costs, the input part of the inner channel is made conical with an expansion angle of 6-11.
    [2]
    2. The device according to claim 1, characterized in that the inner walls of the channel are made with notches.
    [3]
    3, The device according to claim 1, characterized in that the nozzles for the injection of materials are located in the area of the conically shaped channel.
    类似技术:
    公开号 | 公开日 | 专利标题
    US2971830A|1961-02-14|Method of gasifying pulverized coal in vortex flow
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    US20050138964A1|2005-06-30|Facility for melting dusts
    ES2206836T3|2004-05-16|INJECTION BURNER OF PARTICLES.
    US3556773A|1971-01-19|Refining of metals
    SU1473715A3|1989-04-15|Arrangement for injecting pulverulent solid materials into blast furnace
    ES2001975A6|1988-07-01|Forming refractory masses
    CN1007923B|1990-05-09|Apparatus for producing ignitable solids-gas suspensions
    US4487397A|1984-12-11|Method for flame spraying of gunite on lining of metallurgical units
    JP2710374B2|1998-02-10|Equipment for introducing additives into a blast furnace or cupola furnace
    US3010820A|1961-11-28|Process for refining ferrous materials
    CA2109122A1|1992-10-24|Lance for immersion in a pyrometallurgical bath and method involving the lance
    JPH0325202A|1991-02-04|Burner for gasifying powder raw material and powder raw material gasifying device
    KR102012534B1|2019-08-20|Controllable solids injection method
    US4652725A|1987-03-24|Method and apparatus for heating a first gas flow with a second gas flow
    US977113A|1910-11-29|Fuel-burner for cement-kilns.
    KR0137640B1|1998-05-01|Waste furnace
    RU2026392C1|1995-01-09|Furnace for production of zinc oxide
    SU1101538A1|1984-07-07|Apparatus for thermal breaking of minerals with gas jets
    US4915731A|1990-04-10|Metallurgical method and apparatus
    KR200159523Y1|1999-10-15|Apparatus for spraying additive water used in mixing installation in iron ore sintering process
    GB840699A|1960-07-06|Method of gasifying pulverised coal in vortex flow
    AT219633B|1962-02-12|Methods and devices for smelting iron ores in the fluidized furnace of a steam generator
    SU1030633A1|1983-07-23|Furnace for burning silphur lumps
    SU786344A1|1982-11-23|Lance
    同族专利:
    公开号 | 公开日
    BR8602006A|1987-01-06|
    AU5704186A|1986-11-13|
    EP0201441A1|1986-12-17|
    CN1004705B|1989-07-05|
    CN86103851A|1986-12-31|
    ZA863342B|1987-01-28|
    ES554651A0|1987-04-16|
    AT40411T|1989-02-15|
    US4771993A|1988-09-20|
    FR2581395B1|1992-09-18|
    DE3661934D1|1989-03-02|
    ES8705044A1|1987-04-16|
    CA1283297C|1991-04-23|
    FR2581395A1|1986-11-07|
    AU582234B2|1989-03-16|
    EP0201441B1|1989-01-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    LU39431A1|1959-12-24|1961-01-18|
    US3827851A|1972-10-03|1974-08-06|Peabody Gordon Piatt|Combination, oil, gas, and/or solid burner|
    SU423846A1|1973-01-08|1974-04-15|И. И. Кобеза Институт черной металлургии|HOT AIR BREW OF A DOMAIN FURNACE WITH INTEGRATED COMBUSTION CAMERA IN A DIRECT SITE|
    US4072502A|1973-03-26|1978-02-07|Skf Industrial Trading And Development Co. B.V.|Method apparatus for increasing blast gas temperature in a shaft furnace|
    US3892882A|1973-05-25|1975-07-01|Union Carbide Corp|Process for plasma flame spray coating in a sub-atmospheric pressure environment|
    US4002466A|1975-11-03|1977-01-11|Bethlehem Steel Corporation|Method of reducing ores|
    GB2085575A|1980-08-22|1982-04-28|Hamworthy Engineering|Multi-fuel Burner|
    US4422624A|1981-08-27|1983-12-27|Phelps Dodge Corporation|Concentrate burner|
    SE450898B|1981-09-03|1987-08-10|Skf Steel Eng Ab|SET FOR USING A PLASM MAGAZINE FOR SUPPLY OF HEAT ENERGY, AND DEVICE FOR IMPLEMENTATION OF THE SET|
    US4490171A|1982-03-31|1984-12-25|Kobe Steel, Limited|Method and apparatus for injecting pulverized fuel into a blast furnace|
    SE8400738L|1984-02-13|1985-08-14|Petrokraft Ing Ab|BURNER FOR POWDER FUEL COMBUSTION|US4844737A|1986-12-27|1989-07-04|Nippon Kokan Kabushiki Kaisha|Method for operating a blast furnance by blowing pulverized coal|
    JPH0564205B2|1987-01-09|1993-09-14|Nippon Kokan Kk|
    US5227117A|1992-05-29|1993-07-13|Usx Corporation|Apparatus for blast furnace fuel injection|
    CA2073707C|1992-07-13|1998-04-21|Raymond Lemay|Pneumatic injection of powder or granule through submerged tuyeres|
    DE102006029725B4|2006-06-28|2008-08-28|Siemens Ag|Method and device for introducing dusts into a molten metal of a pyrometallurgical plant|
    US9574770B2|2012-04-17|2017-02-21|Alter Nrg Corp.|Start-up torch|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8506849A|FR2581395B1|1985-05-06|1985-05-06|DEVICE FOR INJECTION OF SOLID MATERIALS DIVIDED INTO AN OVEN, IN PARTICULAR A STEEL BLAST, AND APPLICATIONS|
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