• 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:
    1516710 Arc furnace ASEA AB 31 Oct 1975 [25 Nov 1974] 45203/75 Addition to 1501207 Heading H5M The hearth connection of the Parent Specification is modified by making the casing 8 frustoconical and providing it with cooling channels 9 on its external surface so that the terminal end 10 of electrode I will remain solid during operation and the position of the transistor zone 3 between molten and solid electrode material may be controlled.
    公开号:SU965370A4
    申请号:SU752188557
    申请日:1975-11-11
    公开日:1982-10-07
    发明作者:Андерссон Конни
    申请人:Альменна Свенска Электриска Актиебалагет (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a hearth connection for direct current arc furnaces.
    According to the main patent No. 710529, a hearth connection is known, which contains metal electrodes located in the furnace lining enclosed in the housing and connected on one side to a current source and, on the other hand, to the furnace melting space in its lower part, and in the electrode placement zone refrigerators [1].
    However, this device is characterized by insufficiently effective cooling of the electrode.
    The purpose of the invention is more efficient cooling of the electrode.
    The goal is achieved in that the hearth connection for a DC arc furnace, comprising a metal electrode disposed in furnace lining contained in the body and connected on the one hand 2 to a current source and on the other side - with the space of the melting furnace v.nizhney thereof and also refrigerators installed in the area of electrode placement are provided with a metal casing surrounding the lining material near the electrode, on the outside of which pipes for cooling the bottom electrode are placed.
    The casing, the surrounding lining material near the electrode, is made conical.
    In FIG. 1 shows an electrode of a hearth compound, the body of which consists of several metals; in FIG. 2-5 - various positions of the hearth joints; in FIG. b - an electrode with a conical shaft; in FIG. 7 same, cross section; Fig. 8 '> air-cooled electrode; in FIG. 9 - the same, with 'Water cooling; in FIG. 10-12 — curing conditions for various types of electrodes; in FIG. 13-14 - hearth connection located in the ledge of the furnace; in FIG. 15 - furnace cavity, shown from the side provided with two hearth joints; in FIG. 16-18-. variants of hearth joints.
    The hearth connection, located below the melt level, contains a solid rod 1 of copper or other electrically conductive material, in which there is an intermediate rod 2 of iron or steel, the inner part of which has a melting zone D at the transition to the melt 4. Joint 5 of the rods 2 and 1 can be a seam welded with soft solder, but any other suitable joint may be used. The electrode is embedded in the sealing lining material 6, surrounded by brick <7. The lining material is enclosed in a casing 8, the outside of which are placed, pipes 9 for cooling the bottom electrode. The cooling of the electrode prevents the melting zone 3 from moving too far to the side 10 of the electrode. Cooling may be air. In addition, liquid cooling may be used to cool the outer portion 11 of the electrode.
    In the proposed device, the current is transmitted through a hearth electrode, which is a transition from an electrically conductive solid material to a melt.
    The hearth electrode is introduced into the furnace through an opening passing through the lining. The hole may be round or other shape. Its cross-sectional area may be constant. (Fig. 2-5), increasing or decreasing outward from the melt, .25 the hole may be rectilinear or curved.
    In FIG. 2 shows the hole 12, which occupies a part of the surface. Facing the inside of the furnace. The hole 35 is filled with one or more metallic conductive materials, and the melt · penetrates somewhat into the inside of the hole.
    In FIG. 3 shows two openings 4Q 13 and 14 for hearth electrodes, made on the sides of the axis of symmetry of the furnace. .
    In FIG. 4 holes 15 and 16 are located near the level of the melt, but below this level.
    In FIG. 5 shows another embodiment with rectilinear, holes 17- and 18 for hearth electrodes below the melt level in the furnace.
    In FIG. 15 is a side view of a furnace w with hearth electrodes 19 and 20 located below the inside of the discharge trough 21 below the slag hole 22. The furnace is also equipped with a stirrer 23. $$
    In FIG. 13 and 14 show variants of the hearth connection 24 located in the protrusion of the furnace. Here, the solid rod 25 is located in a bent hole and water cooling 60 is applied 60, which is located outside the layer 27 of the exhaust channel 28.
    In Fig. 6, a case of indirect cooling is shown when the lining material 29 is enclosed in a conical 65 casing 30. The casing consists of a sheet located around the electrode 31. The electrode has an intermediate zone 32 between the solid and molten parts of the electrode. Here, the heat is supplied through the lining, which can be printed or cast. Since the casing is made conical, the cooling intensity increases continuously to the outer end of the electrode.
    The electrode 31. is shown inside the layer of the lining material 29. The cross section of the electrode has a circular shape, but other cross-sectional shapes are also possible (Fig. 7).
    In FIG. 8, arrows 33 indicate direct air cooling, but direct water cooling can also be used. Cooling affects the outside of the 34 electrodes.
    In FIG. 9, an electrode 35 is shown, consisting solely of copper, surrounded by a lining material and a conical casing 36, on the outside of which pipes 37 are arranged for cooling the electrode.
    In FIG. 10-12 show three different versions of the bottom electrodes along with temperature curves along these electrodes (T is the temperature (along the y axis). Tg is the bath temperature, the temperature of the hardened part. In addition, the solidification zone is indicated by index 38, the melting part 39.
    In FIG. 11, the melting portion 40, 41 is indicated — another material taken as a rod in a hearth electrode (not iron) and a transition zone 42. between the melt and the solid material. In FIG. 12 shows a rod consisting of copper and other .43 material not containing iron and connected to a part 44 consisting of iron or steel. There is a transition zone 45 between the melt and the solid material.
    In FIG. 16 and 17 show two variants of hearth joints.
    The hearth connection consists of an internal conical metal part made of copper or other material having high thermal conductivity - and is equipped with cooling tubes 46 cast in it. In FIG. 17 shows a hearth joint directed obliquely downward. The hole is below the melt level and is equipped with a pipe .47 for water supply and water outlet 48. The connecting part 49 is located on one side of the electrode and such a hearth connection should be fixed to prevent its penetration deep into, since it lies with its outer part above the level of the melt .
    In FIG. 18 shows an embodiment with a transverse copper plate 50 or another metal plate provided with water or air cooling means. The bottom electrode 51 is surrounded by a lining material with a casing 52, which can be provided with water or air cooling. The current supply is shown at 53.
    权利要求:
    Claims (2)
    [1]
    This invention relates to a bottom connection for direct current arc furnaces. According to the main patent number 710529, a bottom connection is known, which contains metal electrodes located in the furnace lining enclosed in the casing and connected to the current source on one side and the furnace smelting space in the lower part on the other hand, in the area where the electrodes are located Refrigerators 1 are installed. However, this device is characterized by insufficiently efficient electrode cooling. The purpose of the invention is to more efficiently cool the electrode. This goal is achieved by the fact that a bottom connection for a direct current arc furnace, including metal electrodes, is located in a furnace lining enclosed in a casing and connected on one side to the current source and, on the other hand, on smelting furnace c. its parts and also installed in the zone of electrode placement of refrigerators, are provided with a metal casing surrounding the lining material near the electrode, outside of which there are tubes for cooling the bottom electrode. The casing, the surrounding lining material near the electrode, is made conical. FIG. 1 shows the electrode of the bottom joint, the body of which consists of several metals; FIG. 2-5 - different positions of bottom connections; in fig. b - electrode with a tapered shank; in fig. 7 is the same cross section; on FIG. 8, an air-cooled electrode / in FIG. 9 - the same, with water cooling; in fig. 10-12 - hardening conditions for various types of electrodes; in fig. 13-14 - bottom connection located in the protrusion of the furnace; in fig. 15 - furnace cavity, as long as; zannaya from the side provided with two bottom connections; in fig. 16-18. variants of bottom connections. The bottom connection located below the melt level contains a rod 1 made of copper or another electrically conductive material, in which there is an intermediate rod 2 made of iron or steel, the inner part of which has a melting zone D at the transition to the melt 4. The junction 5 of the rods 2 and 1 can be a soft-soldered seam, but any other suitable joint can be used. The electrode is embedded in a sealing lining material .6 surrounded by a brick (7. The lining material is enclosed in a casing 8, outside of which are placed pipes 9 for cooling the bottom electrode. Cooling the electrode prevents the melting zone 3 from moving too far into the side 10. of the electrode. In addition, for cooling the outer part 11 of the electrode, liquid cooling can be used .. In the proposed device, the current is transmitted through the bottom electrode, which is a transition from of the conductive solid material to the melt. The bottom electrode is introduced into the furnace through the hole passing through the lining. The hole may be round or other shape. Its cross-sectional area may be constant (Fig. 2-5), increasing or decreasing out from the melt, the hole can be straight or bent. In Fig. 2, a hole 12 is shown which occupies part of the surface facing the inside of the furnace. The hole is filled with one or more metallic conductive materials repents into the inner portion of the hole. FIG. 3 shows two holes 13 and 14 for the bottom electrodes, made along the sides of the axis of symmetry of the furnace. FIG. 4 holes 15 and 16 are located near the level of the melt, but below this level. FIG. Figure 5 shows another variant with rectilinear, openings 17 and 18 for the bottom of the base electrodes, which are below the level of the melt in the furnace. FIG. 15 is given a side projection of PP with bottom electrodes 19 and 20 located below the inside of the discharge chute 21 and the slag hole 22. The furnace is also equipped with an agitator 23. In FIG. Figures 13 and 14 show variations of the bottom connection 24 located in the protrusion of the furnace. Here, a solid rod 25 is located in a bent hole and water cooling 26 is applied, which is located below the rim of the layer 27 of the inlet chute 28. In FIG. b shows the case of indirect cooling when the lining material 29 is enclosed in a conical casing 30. The casing consists of a sheet located around the electrode 31. The electrode has an intermediate zone 32 between the solid and molten parts of the electrode. Here, heat is supplied through a lining, which can be printed or cast. As the casing is made conical, the cooling intensity increases continuously to the outer end of the electrode. Electrode 31. is depicted inside the lining material layer 29. The electrode cross section has a circular shape, but other shapes of the cross section are also possible (Fig. 7). FIG. 8, arrows 33 indicate direct air cooling, but direct water cooling can also be used. Cooling affects the outer part 34 of the electrode. FIG. 9 shows an electrode 35 consisting only of copper, surrounded by a lining material and a conical case 36, outside of which are placed tubes 37 for cooling the electrode. FIG. 10-12, three different variants of the bottom electrodes are shown along with temperature curves along these electrodes (T is temperature (along the y axis). Te is the bath temperature, T is the temperature of the hardening part. In addition, the solidification zone is indicated by the index 38, melting 39. In Fig. 11, the melting portion 40 is marked, 41 is another material taken as a rod in the bottom electrode (not iron) and a transition zone 42 between the melt and the solid material. Fig. 12 shows a rod consisting of made of copper and other material .43, not containing: o iron and compound with a part 44 consisting of iron or steel. There is a transition zone 45 between the melt and the solid material. Fig. 16 and 17. Two variants of the bottom connections are shown. The bottom connection consists of an inner conical metal part made of copper or other material with a high thermal conductivity- and provided with cooling tubes 46, cast in. In Fig. 17 shows a bottom connection, directed obliquely downward. The hole is located on the melt level level and is provided with a water supply 47 and water outlet 48. The connecting part 49 is on one side of the electrode and this bottom connection must be fixed in order to prevent its penetration deep into it. melt. FIG. Figure 18 shows a variant with a transverse copper plate 50 or other metal plate provided with means of water or air cooling. The bottom electrode 51 is surrounded by a lining material with a cover 52, which can be supplied with water or air cooling. The current supply is shown at 53, Formula of the Invention. 1. A current supply device for a DC arc furnace according to the patent of USSR No. 710529, which is so that, in order to more efficiently cool the electrode / bottom connection, the surrounding lining material near the electrode has a metal casing which are placed tubes for cooling the bottom electrode.
    [2]
    2. The device according to claim 1, about 1 ton. Also, the fact that the casing surrounding the lining material near the electrode is made conical. Sources of information taken into account in the examination 1. USSR Patent No. 710529, cl. F 27 D 11/00, 1975.
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    同族专利:
    公开号 | 公开日
    SE419929B|1981-08-31|
    FR2292397A2|1976-06-18|
    DE2550671A1|1976-05-26|
    SE7414743L|1976-05-26|
    JPS5619960B2|1981-05-11|
    GB1516710A|1978-07-05|
    IT1051271B|1981-04-21|
    FR2292397B2|1981-04-17|
    JPS51102235A|1976-09-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2516116C2|2009-12-15|2014-05-20|Даньели Энд К. Оффичине Мекканике С.П.А.|Electrode for electric arc dc furnace of continuous action|CH452730A|1966-04-26|1968-03-15|Bbc Brown Boveri & Cie|Electrode assembly in contact with molten metal on an electric furnace|
    GB1184501A|1967-02-14|1970-03-18|Ass Elect Ind|Electrical Connections to Molten Metal.|FR2441313B1|1978-11-10|1981-10-02|Siderurgie Fse Inst Rech|
    SE431792B|1981-06-09|1984-02-27|Asea Ab|PUT TO OPERATE A DC LIGHT REAR OVEN|
    DE3461979D1|1983-07-28|1987-02-12|Bbc Brown Boveri & Cie|Cooling arrangement of a bottom electrode of a direct current arc furnace|
    AT25179T|1983-07-28|1987-02-15|Bbc Brown Boveri & Cie|PROTECTIVE ARRANGEMENT FOR A FLOOR ELECTRODE OF A DC ARC FURNACE.|
    EP0132711A3|1983-07-28|1985-03-13|BBC Aktiengesellschaft Brown, Boveri & Cie.|Dimensioning of a bottom electrode for a direct current arc furnace to minimize power losses|
    CH664059A5|1983-07-28|1988-01-29|Bbc Brown Boveri & Cie|ELECTRIC OVEN, ESPECIALLY DIRECT ARC FURNACE.|
    AT27059T|1983-07-28|1987-05-15|Bbc Brown Boveri & Cie|FLOOR ELECTRODE FOR A DC ARC FURNACE.|
    AT34900T|1984-01-31|1988-06-15|Bbc Brown Boveri & Cie|FLOOR ELECTRODE ARRANGEMENT FOR AN ELECTRIC OVEN.|
    DE3471868D1|1984-01-31|1988-07-07|Bbc Brown Boveri & Cie|Bottom electrode for direct current arc furnace|
    DE3578028D1|1984-07-06|1990-07-05|Bbc Brown Boveri & Cie|BATH ELECTRODE FOR PAN OVEN.|
    FR2572873B1|1984-11-06|1988-12-02|Siderurgie Fse Inst Rech|WALL ELECTRODE FOR DIRECT CURRENT ELECTRIC METALLURGICAL OVEN|
    SE450857B|1985-02-21|1987-08-03|Asea Ab|PROCEDURE FOR BUILDING OF LIGHT REAR SUCTIONS OR DRAWERS|
    JPH0277962U|1988-11-30|1990-06-14|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7414743A|SE419929B|1974-11-25|1974-11-25|MELT CONTACT ELECTROD|
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