CN101839627A - Small cover on center of arc furnace - Google Patents
Small cover on center of arc furnace Download PDFInfo
- Publication number
- CN101839627A CN101839627A CN201010186932A CN201010186932A CN101839627A CN 101839627 A CN101839627 A CN 101839627A CN 201010186932 A CN201010186932 A CN 201010186932A CN 201010186932 A CN201010186932 A CN 201010186932A CN 101839627 A CN101839627 A CN 101839627A
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- Prior art keywords
- water cooling
- cooling tube
- refractory material
- center
- water
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention relates to a small cover on the center of an arc furnace, which comprises a fire-proofing material cover body (1) and an electrode hole (2), and is characterized in that a water cooling pipe (3) is arranged inside the fire-proofing material cover body (1), the water cooling pipe (3) is completely arranged inside the fire-proofing material cover body (1), the water inlet end (4) and the water outlet end (5) of the water cooling pipe (3) are arranged on the upper surface of the fire-proofing material cover body (1) to be close to the edge, the water inlet end (4) and the water outlet end (5) of the water cooling pipe (3) which extends out of the fire-proofing material cover body (1) are bent towards the horizontal direction to extend out of the outer edge of the fire-proofing material cover body (1), and the entire water cooling pipe (3) forms a closed loop. The water cooling pipe is embedded inside the fire-proofing material cover body of the small cover on the center of the arc furnace, so the temperature of the small cover is reduced through the water cooling, the high-temperature chemical erosion speed is reduced, the high-temperature stripping is reduced, and the service life is greatly improved.
Description
Technical field
The invention belongs to metallurgical technology field, is the improvement to the little bell in converter center, relates in particular to the little bell in a kind of electric arc furnaces center.
Background technology
Modern electric arc furnaces bell generally is made up of big bell of water-cooled and center port lid, and the little bell in center also claims bell trigonum or central lid.The little bell in center is generally anti-material and makes, its effect: the one, and the heat in arc furnace smelting procedure shielding arc light and stove reduces heat and scatters and disappears, protection furnace roof equipment; The 2nd, prevent that the big bell of water-cooled from joining the electric starting the arc and beating leakage, reduce unnecessary heat and stop.But along with the shortening in electric arc furnace smelting cycle, unit interval energy input strengthens, the particularly increase of oxygen supply intensity, and chemical reaction velocity sharply increases, and forms the oxidizing atmosphere of high temperature, high pressure in the stove, and the condition of work of the little bell in center worsens.The high temperature furnace slag of the washing away of high temperature gas flow, splash and the chemical erosion of gas reduce the center port lid life-span significantly.Because the center port lid life-span is low and unstable, can not realize that more switching center9's port lid is synchronous with the plan blowing out, influence the continuity of electric arc furnace smelting, finally influence the stability of continuous casting.Not only cause production efficiency to reduce, and influence product quality.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, the little bell in electric arc furnaces center of a kind of high life is provided, avoid the big bell of water-cooled to join the electric starting the arc simultaneously and beat leakage.Realize that the technical scheme that purpose of the present invention is taked is: this little bell includes refractory material bell body and the electrode hole with the refractory material cast molding, be provided with water cooling tube in the refractory material bell body, and water cooling tube is arranged in the refractory material bell body fully, water cooling tube turnover water end (W.E.) is arranged on the upper surface of refractory material bell body near outer rim, expose the outside level of approximation direction of the water cooling tube entrance end bending of refractory material bell body upper surface, stretch out the external edge of refractory material bell.Whole water cooling tube forms closed circuit cooling.Be to increase cooling surface, the water cooling tube shape that in refractory material bell body, takes the shape of the letter U, the outer surface of water cooling tube is provided with fixedly reinforcing bar, and water cooling tube closely is connected with refractory material bell body.
The present invention is by burying the water-cooled pipeline underground in the refractory material bell body of the little bell in electric arc furnaces center, water flowing is cooled off, and has reduced the temperature of the little bell in center, has reduced the high temeperature chemistry erosive velocity, has reduced high temperature and has peeled off, and the life-span increases considerably; The water cooling tube outer surface is provided with fixedly reinforcing bar, has increased the bonding tightness of water cooling tube and refractory material bell body; Water cooling tube plays the effect of skeleton, and in-out end stretches out the external edge of refractory material bell in addition, can avoid center port lid to use the later stage to crash in the stove.The present invention also is applicable to the little bells in smelting furnace center such as ladle refining furnace.
Description of drawings
Fig. 1 is a vertical view of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1 among the present invention;
Fig. 3 is the B-B cutaway view of Fig. 1 among the present invention.
Among the figure, 1, refractory material bell body, 2, electrode hole, 3, water cooling tube, 4, water inlet end, 5, the water side, 6, fixing reinforcing bar.
The specific embodiment
With reference to accompanying drawing, this little bell includes refractory material bell body 1 and electrode hole 2, be provided with water cooling tube 3 in the refractory material bell body 1, and water cooling tube 3 is arranged in the refractory material bell body 1 fully, water cooling tube 3 water inlet ends 4 and water side 5 are arranged on the upper surface of refractory material bell body 1 near outer rim, expose the water inlet end 4 and the port of export 5 outside level of approximation direction bendings of the water cooling tube 3 of refractory material bell body 1 upper surface, stretch out refractory material bell body 1 outward flange.Whole water cooling tube 3 forms closed circuit cooling.Be to increase cooling surface, water cooling tube 3 shape that in refractory material bell body 1, takes the shape of the letter U, the outer surface of water cooling tube 3 is provided with fixedly reinforcing bar 6, and water cooling tube 3 and refractory material bell body 1 are combined closely.
The present invention on the make before the little bell of the heart, is embedded into water cooling tube, and water cooling tube also plays the effect of skeleton, and the center port of avoiding covers local bulk and caves in.Because the water flowing cooling, center port interior surface is to water cooling tube, and temperature reduces gradually, lower near near the regional temperature the water cooling tube, can eliminate the different stress that cause with the bell body heat coefficient of expansion of metal tube under the hot conditions.The water cooling tube outer surface is welded with the long fixedly reinforcing bar of 5～20mm, and water cooling tube and the anti-material of bell body are combined closely.Water cooling tube is the heat-resistance stainless steel pipe, must not form closed loop around electrode and connect.
Claims (3)
1. little bell in electric arc furnaces center, include refractory material bell body (1) and electrode hole (2), it is characterized in that being provided with in the refractory material bell body (1) water cooling tube (3), and water cooling tube (3) is arranged in the refractory material bell body (1) fully, water cooling tube (3) water inlet end (4) and water side (5) are arranged on the upper surface of refractory material bell body (1) near outer rim, the water inlet end (4) and the outwards level of approximation direction bending of the port of export (5) of exposing the water cooling tube (3) of refractory material bell body (1) upper surface, stretch out refractory material bell body (1) outward flange, whole water cooling tube (3) forms closed circuit cooling.
2. according to the little bell in the said electric arc furnaces of claim 1 center, it is characterized in that water cooling tube (3) shape that in refractory material bell body (1), takes the shape of the letter U.
3. according to the little bell in the said electric arc furnaces of claim 1 center, it is characterized in that the outer surface of water cooling tube (3) is provided with fixedly reinforcing bar (6), water cooling tube (3) and refractory material bell body (1) are combined closely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186932A CN101839627A (en) | 2010-05-31 | 2010-05-31 | Small cover on center of arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186932A CN101839627A (en) | 2010-05-31 | 2010-05-31 | Small cover on center of arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101839627A true CN101839627A (en) | 2010-09-22 |
Family
ID=42743161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010186932A Pending CN101839627A (en) | 2010-05-31 | 2010-05-31 | Small cover on center of arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101839627A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512362A (en) * | 2013-09-25 | 2014-01-15 | 欧萨斯能源环境设备(南京)有限公司 | Explosion door for furnace door of Isa furnace |
| CN103575090A (en) * | 2012-08-08 | 2014-02-12 | 代忠 | Titanium and iron separation electric arc furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104076A (en) * | 1982-12-07 | 1984-06-15 | 石川島播磨重工業株式会社 | Water-cooling small ceiling structure for arc furnace |
| JPH07286783A (en) * | 1994-04-18 | 1995-10-31 | Nippon Steel Corp | Water-cooled furnace lid for electric furnace |
| JPH07286782A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Electrode sleeve for arc furnace lid |
| WO2006117426A1 (en) * | 2005-04-29 | 2006-11-09 | Outotec Oyj. | Lid for electric arc furnace |
| CN101539367A (en) * | 2009-04-23 | 2009-09-23 | 宜兴市振球炉料有限公司 | Small furnace cover of electric furnace and preparation method thereof |
| CN201680704U (en) * | 2010-05-31 | 2010-12-22 | 莱芜钢铁集团有限公司 | Small center furnace cover of electric arc furnace |
-
2010
- 2010-05-31 CN CN201010186932A patent/CN101839627A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104076A (en) * | 1982-12-07 | 1984-06-15 | 石川島播磨重工業株式会社 | Water-cooling small ceiling structure for arc furnace |
| JPH07286782A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Electrode sleeve for arc furnace lid |
| JPH07286783A (en) * | 1994-04-18 | 1995-10-31 | Nippon Steel Corp | Water-cooled furnace lid for electric furnace |
| WO2006117426A1 (en) * | 2005-04-29 | 2006-11-09 | Outotec Oyj. | Lid for electric arc furnace |
| CN101539367A (en) * | 2009-04-23 | 2009-09-23 | 宜兴市振球炉料有限公司 | Small furnace cover of electric furnace and preparation method thereof |
| CN201680704U (en) * | 2010-05-31 | 2010-12-22 | 莱芜钢铁集团有限公司 | Small center furnace cover of electric arc furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575090A (en) * | 2012-08-08 | 2014-02-12 | 代忠 | Titanium and iron separation electric arc furnace |
| CN103512362A (en) * | 2013-09-25 | 2014-01-15 | 欧萨斯能源环境设备(南京)有限公司 | Explosion door for furnace door of Isa furnace |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20100922 |