• 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:
    The invention relates to an arc furnace roof. The roof is comprised of a metal cover which is bolt-connected to the furnace shell. Secured to the lower side of the cover is a plurality of shackle hooks, each of said shackle hooks having an anchor bolt hooked therein. The metal cover has a first layer of insulating concrete applied to its lower side and a second layer of refractory concrete applied to the hard first layer of insulating concrete, the two layers of insulating and refractory concrete, respectively, embedding the shackle hooks and anchor bolts.
    公开号:SU1034617A3
    申请号:SU802937830
    申请日:1980-06-20
    公开日:1983-08-07
    发明作者:Бюринг Отто；Йозефус Вильхельмус Дрессен Герардус；Виллем Хендрик Греневельд Якоб；Квек Роберт；Томе Хайнрих；Йоханнес Виллемзен Геррит
    申请人:Хехст Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to ferrous metallurgy, more specifically to the construction of vaults of electrothermal reduction furnaces.
    A known lid for a steelmaking electric furnace, which has an extruded shape, and consists of a ring-shaped ceramic frame, wherein both frames are joined in the radial direction by several reinforcing ceramic walls 10. The space between the reinforcing walls and the space between these frames is filled with refractory material Cl.15
    However, such a shape of the vault undergoes a complex temperature deformation during heating, which leads to its rapid destruction.
    The closest in technical essence and the achieved result is REDD; electrothermal reduction furnace, consisting of a metal cover attached with bolts to the furnace walls, under which there is a layer of refractory material. In order to etae cover more to shield from high temperature or temperature fluctuations, on the bottom side of the cover additional -f. water cooling lines С 2 fastened with water
    To guarantee the temperature of the metal cover, not 100 ° C should be installed in a layer of alumina fused: cement cooling 35 lines, which must be constantly washed with cooling water. Already in the short-term absence of cooling water, metal cooling lines, laid 40 in alumina smelted, cement, can be destroyed under the influence of high temperatures. Repairing them requires a prolonged interruption in the operation of the furnace. Continuing to operate from the furnace with damaged main lines is problematic, since water or water vapor can get into the furnace.
    The purpose of the invention is to reduce the cooling cost and increase the lifetime of the roof.
    The goal is achieved by the arch of the electrothermal reduction furnace consisting of a metal cover attached with bolts to the furnace walls, under which there is a layer of refractory material, provided with brackets mounted on the underside of the metal cover, and evenly 60 square meters of square 10-16 brackets are distributed, on each of which a ceramic or metal anchor is suspended, while on the lower part of the metal 65
    Kriei is first applied a layer of insulating concrete, consisting of hydralically connected mass containing.,. wt.%: A1,2. Oz 6-10} 3238; MgO 15-20; CaO 30-35 and 402OO, and a layer of refractory concrete from a hydraulically bonded mass containing, in wt.%; , 50-85; SiO.2 5-8 and 10-12, and the anchors are completely recessed in the layer of refractory concrete.
    Ten anchors and staples are needed for. In order to carry the load of the layer of insulating and refractory concrete with a thickness of 25-30 cm, the upper border of the brackets is determined by: economic indicators.
    It is simpler to make a suspended ceiling both at the initial installation and at later repairs than the known vaults of the furnaces. When installing again, a krpipa consisting of several segments in case of misbehavior can be laid upside down, and the application of layers of insulating concrete or refractory concrete is carried out using the pouring method. During repair work after blasting the damaged area and installing a new anchor on the underside of the furnace roof, layers of insulating and refractory concrete are applied by spraying (by extrusion from below, and a layer of refractory concrete is applied repeatedly if necessary.
    In the furnace roof, at a temperature on the lower side of the layer of refractory concrete 600-EOO ° C, the temperature of the metal cover is set at 75-90 C.
    FIG. .1 shows the proposed arch with cast anchors, side view; in fig. 2 - the same, with ceramic anchors; in fig. 3 - temperature curve of the heating of the arch during its operation.
    The steel lid 1 of the reduction furnace, which has openings for the electrodes and the loading pipes and the gas exhaust pipes, is supported through the support ring 2 on the flange 3 of the furnace bath lined in its upper part with chamotte brick 4. 10-16 brackets 5 an equal distance from each other, on which the anchors 6 are suspended, respectively. A layer of insulating concrete is first applied to the bottom side of the cover 1, and after setting the insulating concrete 7, a layer of refractory concrete 8 is applied.
     P m and 6 p. A cover made of an anti-magnetic steel by an electrothermal regenerative furnace is bent upside down. On
    10-16 brackets of cast iron are welded to the bottom side of the cover with a uniform distribution over the surface of about 40 s. Anchors made of cast iron are attached to the brackets and attached to the cover vertically to the lid using an auxiliary construction, then 7.5 cm hydraulically coupled insulating mass. After a period of setting equal to this layer for 8-14 hours, a layer with a thickness of 17.5 cm is applied to the hydraulically bonded refractory mass (filled with vibrations). After the hot air is applied to the surface of this layer at 7080 seconds for approximately 24 hours, the compressive strength in the cold state of this layer becomes such that the cover can be transported to the furnace: for installation.
    Such a device will allow to increase its service life and reduce the consumption of refractory materials.
     .f 5
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    权利要求:
    Claims (1)
    [1]
    VALVE OF ELECTROTHERMAL 'REDUCING FURNACE, consisting of Weiz bolted to the shifts of the metal lid of the furnace, under which there is a layer of refractory material, which differs in that, in order to reduce cooling costs and increase the service life of the vault, it is equipped with brackets mounted on the bottom side of the metal cover, and on each square meter of its area ΙΟΙ b brackets are evenly distributed, on each of which a ceramic or metal anchor is hung, while on the lower part the first cover is first applied · a layer of insulating concrete from a hydraulically bound mass containing, wt.%: Alj> O 3 6-10; SiO 2 32-38; CaO 30-35; MgO 15-20 and HaP 40-200, and a layer of refractory concrete from a hydraulically bound mass containing, wt.%: A1z_0 3 5085; SiO t 5-8 and H ^ O 10-12, and the anchors are completely recessed in the layer of refractory concrete.
    Fig / "SU <". 1034617
    类似技术:
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    US3554517A|1971-01-12|Shaft furnace shell cooling system
    US3453787A|1969-07-08|Furnace roof construction
    RU2115874C1|1998-07-20|Ore-smelting furnace bath lining
    同族专利:
    公开号 | 公开日
    CA1137145A|1982-12-07|
    DE2925395A1|1981-01-15|
    NL182341B|1987-09-16|
    US4323718A|1982-04-06|
    JPS6260633B2|1987-12-17|
    JPS563878A|1981-01-16|
    ZA803712B|1981-07-29|
    DE2925395C2|1984-04-19|
    NL8003562A|1980-12-29|
    NL182341C|1988-02-16|
    引用文献:
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    US1978077A|1933-02-03|1934-10-23|S Obermayer Co|Furnace lining|
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    DE1914199A1|1968-03-21|1969-10-16|Power Gas Ltd|Furnace wall and process for their manufacture|
    GB1232744A|1969-03-17|1971-05-19|US4763584A|1987-03-02|1988-08-16|Combustion Engineering, Inc.|Means of attaching refractory to a furnace wall|
    US5058126A|1989-08-31|1991-10-15|Dosaj Vishu D|Silicon carbide beam as refractory in an open-arc furnace|
    WO1997003322A1|1995-07-13|1997-01-30|Foster Wheeler Energia Oy|Erosion resistant wall assembly|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2925395A|DE2925395C2|1979-06-23|1979-06-23|Furnace ceiling for an electrothermal reduction furnace|
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