CN2160875Y - Electrode for bottom of arc furnace - Google Patents
Electrode for bottom of arc furnace Download PDFInfo
- Publication number
- CN2160875Y CN2160875Y CN 93228103 CN93228103U CN2160875Y CN 2160875 Y CN2160875 Y CN 2160875Y CN 93228103 CN93228103 CN 93228103 CN 93228103 U CN93228103 U CN 93228103U CN 2160875 Y CN2160875 Y CN 2160875Y
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- CN
- China
- Prior art keywords
- furnace
- electrode
- furnace shell
- hearth electrode
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model provides an electrode for the furnace bottom of an electric arc furnace, which comprises the electrode for the furnace bottom, a cooling device and a furnace shell. The utility model is characterized in that the electrode adopts an annular conductor; the upper end of the electrode is raised over the upper mouth face of the furnace shell; the lower end of the electrode extends out of the bottom mouth face of the furnace shell. The cooling device is arranged in an annular box body on the periphery of theelectrode. The outer part of the box body can be connected with a cable through a connecting plate. The electric plate of the furnace bottom can be connected with the flange of the furnace shell through the flange of the furnace bottom. The utility model principally overcomes the defects of the electrode, has the advantages of low cost, long service life, simple structure, high safety, and can be used for steel-making plants by using the electric arc furnace.
Description
The utility model belongs to the electric-arc furnace steelmaking device, particularly a kind of water-cooled ring-type DC arc furnace bottom electrode.
Direct current electric arc furnace is the new technology that the eighties grows up.Series of advantages such as it is compared with traditional three-phase ac electric arc furnace, and it is few to have a graphite electrode consumption, and power consumption is low, uses the electricity quality height, and the little and refractory consumption rate of noise is low, therefore, this technology is subjected to extensive attention both domestic and external.The key technology of direct current electric arc furnace has the two large divisions, dc rectification power and hearth electrode.
At present the electrode structure of furnace hearth form of direct current electric arc furnace have that multi-electrode is air-cooled, three utmost points or one pole water-cooled and the air-cooled three kinds of forms of monolithic conductive furnace bottom.Multi-electrode air cooled bottom electrode primary structure is that electrode is knotted in the bottom refractory with tens to up to a hundred needle-likes (tens millimeters of diameters), and with collector plate they is connected below reaching the furnace bottom furnace shell.There is an airduct center to feed the cooling air.Be air chamber and be provided with the air guide blade resemble the turbine in a large number that making can be mobile towards the needle-like conductive rod after the cooling air enters air chamber between collector plate and drop-bottom.The shortcoming of its existence is the bottom construction more complicated, it is cumbersome to make installation, bottom refractory knotting difficulty and closely knit inadequately, when blowing out, stay the steel operation, producing to shrink when molten steel solidification makes needle electrode break easily, the life of bottom is not high, has only the 100-400 stove, so the cost of furnace bottom is higher relatively.
Other has a kind of hearth electrode is to adopt single electrode or three electrode water-cooleds, single electrode water-cooled, its major defect are that the furnace bottom conduction is concentrated, a little less than the stirring relatively to the molten bath, owing to concentrate conduction, the conductive area that needs is relatively large, and the metal wastage during manufacturing is also big, because the hearth electrode area is bigger, the furnace bottom heat radiation increases, and three electrode water-cooled furnace bottoms because it has increased the bottom construction complexity, have increased manufacturing cost obviously not as single electrode water-cooled furnace bottom.
In view of the deficiency that above-mentioned prior art exists, it is a kind of simple in structure that the purpose of this utility model is to provide, the water-cooled ring-type DC arc furnace bottom electrode of life-span length, easy-maintaining.
For achieving the above object, the utility model is to adopt following technical scheme to realize.It comprises hearth electrode, cooling device, furnace shell, its structural feature is an electrode electric conductor in the form of a ring, the upper end exceeds actinal surface on the furnace shell, and the end actinal surface of furnace shell is stretched out in the lower end, and cooling device is provided in a side of the ring-shaped box of electrode periphery, casing is outer to be connected with cable by gusset piece, and hearth electrode is connected with the furnace shell flange by the furnace bottom flange.
Below in conjunction with accompanying drawing the utility model is further described with by way of example.
The section of structure of the hearth electrode that Fig. 1 provides for the utility model.
As can be seen from Figure 1, ring-type electric conductor 1 is located at furnace shell 2 central authorities, its upper surface exceeds actinal surface on the furnace shell, the lower end is stretched out furnace shell and is gone to the bottom actinal surface to ring-type water tank bottom plate 7 places, ring-type water tank 6 is located at ring-type electric conductor periphery, the furnace shell lower openings is established a flange 3, and is connected with electrode flange 4 on the ring-type electric conductor, insulate by bakelite between two flanges.The ring-type water tank is provided with water inlet pipe 9 and outlet pipe 5, and in order to feed cooling water, a plurality of cable connecting plates 10 are located at around the ring-type water tank, are connected with cable, and 8 are located at ring-type water tank intermediate openings place, ring-type electric conductor bottom at the bottom of the port.Refractory material 11 fills up in the furnace shell.
The hearth electrode that the utility model provides compared with prior art has following advantage:
1. simple in structure, material usage is few and cheap, and manufacturing process is also simple, and therefore the cost of whole hearth electrode is very low, and molten steel per ton consumes about 2 yuan of the required costs of hearth electrode.
2. safe and reliable, the life-span is long. Each stove labour (by 100 furnace gauges) light maintenance once can be used more than 10 stove labour continuously namely greater than 1000 stoves.
3. furnace bottom is built by laying and is tied a knot conveniently, and light maintenance is convenient, is easy to change the melting loss part.
4. furnace bottom conduction radius is big, and electric arc magnetic field mixing power is strong, helps molten steel composition and temperature is even.
Since axially bulk strength much larger than multipole needle-like anode, thereby cause conductor electrode to break after having overcome blowing out.
6. resistance is little, and electric energy loss is few, and the furnace bottom heat radiation is also less.
Claims (3)
1, a kind of direct current electric arc furnace hearth electrode that is used for, comprise hearth electrode, cooling device, furnace shell, it is characterized in that: hearth electrode is electric conductor in the form of a ring, the upper end exceeds actinal surface on the furnace shell, actinal surface at the bottom of the furnace shell is stretched out in the lower end, cooling device is provided in a side of the ring-shaped box of hearth electrode periphery, and casing is outer to be connected with cable by gusset piece, and hearth electrode is connected with the furnace shell flange by the furnace bottom flange.
2, hearth electrode according to claim 1 is characterized in that: be provided with dielectric between furnace bottom flange and the furnace shell flange.Ring-shaped box is provided with water inlet pipe and outlet pipe.
3, hearth electrode according to claim 2 is characterized in that: said dielectric is a phenolic aldehyde electricity art material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228103 CN2160875Y (en) | 1993-05-06 | 1993-05-06 | Electrode for bottom of arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228103 CN2160875Y (en) | 1993-05-06 | 1993-05-06 | Electrode for bottom of arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2160875Y true CN2160875Y (en) | 1994-04-06 |
Family
ID=33805231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93228103 Expired - Fee Related CN2160875Y (en) | 1993-05-06 | 1993-05-06 | Electrode for bottom of arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2160875Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374787A (en) * | 2010-08-26 | 2012-03-14 | 沈阳铝镁设计研究院有限公司 | Bottom device of electric calcining furnace |
| CN102927825A (en) * | 2012-11-15 | 2013-02-13 | 董淑林 | Quartz smelting furnace |
| CN106595319A (en) * | 2017-02-10 | 2017-04-26 | 西安电炉研究所有限公司 | Cylinder type air-cooling bottom electrode |
-
1993
- 1993-05-06 CN CN 93228103 patent/CN2160875Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374787A (en) * | 2010-08-26 | 2012-03-14 | 沈阳铝镁设计研究院有限公司 | Bottom device of electric calcining furnace |
| CN102374787B (en) * | 2010-08-26 | 2013-08-14 | 沈阳铝镁设计研究院有限公司 | Bottom device of electric calcining furnace |
| CN102927825A (en) * | 2012-11-15 | 2013-02-13 | 董淑林 | Quartz smelting furnace |
| CN106595319A (en) * | 2017-02-10 | 2017-04-26 | 西安电炉研究所有限公司 | Cylinder type air-cooling bottom electrode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |