CN101839626A - Small cover on center of arc furnace - Google Patents
Small cover on center of arc furnace Download PDFInfo
- Publication number
- CN101839626A CN101839626A CN201010186927A CN201010186927A CN101839626A CN 101839626 A CN101839626 A CN 101839626A CN 201010186927 A CN201010186927 A CN 201010186927A CN 201010186927 A CN201010186927 A CN 201010186927A CN 101839626 A CN101839626 A CN 101839626A
- Authority
- CN
- China
- Prior art keywords
- annular main
- main channel
- center
- refractory material
- bell
- 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.)
- Pending
Links
Images
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (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 an annular main passage (3) is arranged inside the fire-proofing material cover body (1), the cross shape and the layer quantity of the annular main passage are unlimited, the annular main passage (3) is provided with a main passage opening (4) on the upper surface of the fire-proofing material cover body (1), the inner side of the annular main passage (3) is provided with a plurality of openings (7), each opening (7) is communicated with a small passage (5) with unlimited side surface shape which leads to the lower surface of the fire-proofing material cover body (1) and the electrode hole, and the small passage (5) is inclined downwards to form an angle of 0 to 30 degrees. The small cover is cooled by introduced air and water. On the premise that the fire-proofing material cover body is not damaged, the temperature of the central small cover and especially of the electrode triangular area is reduced, so erosion on each part of the cover is synchronic to each other, and the service life of the small cover is 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.Realize that the technical scheme that purpose of the present invention is taked is: the little bell in this center includes refractory material bell body and the electrode hole with the refractory material cast molding, be provided with annular main channel in refractory material bell body inside, its cross sectional shape, the number of plies are not limit, and opening is left at refractory material bell body upper surface in the main channel.Be provided with some openings in inboard, annular main channel, opening with lead to the thin channel that refractory material bell body lower surface and electrode hole medial surface shape do not limit and connect the downward-sloping certain angle of thin channel.The annular main channel is provided with 1～3, and each annular main channel is provided with thin channel bar number and is not less than 3.Surface, said annular main channel is provided with fixedly, and reinforcing bar makes pipeline closely be connected with anti-material.The downward canting 0-30 of said thin channel °.Upper surface annular main channel mouth connects gas and water mixer outward, after air water mixed by a certain percentage, feed annular main channel with certain pressure, thin channel by communicating thereupon with center port lid lower surface and electrode hole inboard, realization is to center port lid, the particularly cooling of electrode hole trigonum.Gas medium is selected compressed air or nitrogen.
The present invention is by feeding the air water cooling, and under the prerequisite of not damaging refractory material bell body, the little bell in reduction center is electrode trigonum temperature particularly, and each position of bell is corroded synchronously, improves the port lid life-span.And can change cooling effect by adjusting the air water ratio.Adopt the metal solid occupy-place to make annular main channel, can play skeleton function, strengthen the integraty of little bell, effectively avoid center port lid to use the later stage to crash in the stove.Inside is provided with burns the thin channel that indecorous occupy-place mode is made, and can play effective buffering because of the expansion that rises to anti-material is uneven because of each position is heated, and reduces it and plays destruction, prevents the cracking that causes thus.The center port lid life-span improves, and can reduce the electric furnace furnace outage time, boosts productivity, and helps the production stable equilibrium, improves the quality of products.The present invention also is applicable to other little bells in metallurgical furnace center.
Description of drawings
Fig. 1 is a vertical view of the present invention;
The A-A cutaway view of Fig. 2 Fig. 1 of the present invention.
Among the figure, 1, refractory material bell body, 2, electrode hole, 3, annular main channel, 4, the main channel opening, 5, thin channel, 6, fixing reinforcing bar, 7, opening.
The specific embodiment
Referring to accompanying drawing.The little bell in this center includes refractory material bell body 1 and electrode hole 2, is provided with annular main channel 3 in refractory material bell body 1 inside, and its cross sectional shape, the number of plies are not limit, and main channel opening 4 is left at refractory material bell body 1 upper surface in annular main channel 3.Be provided with some openings 7 in 3 inboards, annular main channel, each opening 7 with lead to the thin channel 5 that center port lid lower surface and electrode hole medial surface shape do not limit and connect thin channel 5 downward-sloping certain angles.Annular main channel 3 is provided with 1～3, and the bar number that each annular main channel 3 is provided with thin channel 5 is not less than 3.3 surfaces, said annular main channel are provided with fixedly, and reinforcing bar 6 makes annular main channel 3 combine closely with refractory material bell body 1.Said thin channel 5 downward canting 0-30 °.
During use, the external gas water mixing device.Air-water mixture with certain pressure enters annular main channel 3, and enters the thin channel 5 of leading to refractory material bell body 1 lower surface and electrode hole 2 medial surfaces by the opening 7 of 3 inboards, annular main channel.Air-water mixture is in cooling procedure, water wherein is with the rising of temperature, constantly vaporization, gas medium promotes steam to discharge from the thin channel 5 of leading to refractory material bell body lower surface and electrode hole medial surface, take away a large amount of heats, do not damaging under the prerequisite that port covers 1 refractory material, realizing to little bell the particularly cooling of electrode trigonum.
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 annular main channel (3) in refractory material bell body (1) inside, its cross sectional shape, the number of plies are not limit, main channel opening (4) is left at refractory material bell body (1) upper surface in annular main channel (3), be provided with some openings (7) in inboard, annular main channel (3), each opening (7) with lead to the thin channel 5 that refractory material bell body (1) lower surface and electrode hole medial surface shape do not limit and connect thin channel 5 downward-sloping certain angle 0-30 °.
2. according to the little bell in the said electric arc furnaces of claim 1 center, it is characterized in that annular main channel (3) is provided with 1～3, the bar number that each annular main channel (3) is provided with thin channel (5) is not less than 3.
3. according to the little bell in the said electric arc furnaces of claim 1 center, it is characterized in that surface, said annular main channel (3) is provided with fixedly reinforcing bar (6), annular main channel (3) and refractory material bell body (1) are combined closely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186927A CN101839626A (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 |
|---|---|---|---|
| CN201010186927A CN101839626A (en) | 2010-05-31 | 2010-05-31 | Small cover on center of arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101839626A true CN101839626A (en) | 2010-09-22 |
Family
ID=42743160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010186927A Pending CN101839626A (en) | 2010-05-31 | 2010-05-31 | Small cover on center of arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101839626A (en) |
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 |
| EP0437037A2 (en) * | 1989-12-11 | 1991-07-17 | Foseco International Limited | Method and apparatus for closing the gap between an electrode and its furnace cover in an electric furnace |
| JPH07286782A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Electrode sleeve for arc furnace lid |
| JPH09126657A (en) * | 1995-10-31 | 1997-05-16 | Kawasaki Steel Corp | Small ceiling refractory and cooling method thereof in dc 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 |
| CN201680702U (en) * | 2010-05-31 | 2010-12-22 | 莱芜钢铁集团有限公司 | Central small furnace cover for arc furnaces |
-
2010
- 2010-05-31 CN CN201010186927A patent/CN101839626A/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 |
| EP0437037A2 (en) * | 1989-12-11 | 1991-07-17 | Foseco International Limited | Method and apparatus for closing the gap between an electrode and its furnace cover in an electric furnace |
| JPH07286782A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Electrode sleeve for arc furnace lid |
| JPH09126657A (en) * | 1995-10-31 | 1997-05-16 | Kawasaki Steel Corp | Small ceiling refractory and cooling method thereof in dc 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 |
| CN201680702U (en) * | 2010-05-31 | 2010-12-22 | 莱芜钢铁集团有限公司 | Central small furnace cover for arc furnaces |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5155503B2 (en) | Stable pause operation in a method for producing molten metal | |
| JP5415940B2 (en) | Metallurgical vessel and its cooling device | |
| RU2008138874A (en) | INSTALLATION FOR DIRECT Smelting | |
| JP5726614B2 (en) | Refractory brick cooling structure and method for converter | |
| CN102037146B (en) | Burner/injector panel apparatus | |
| CN103993116B (en) | Double tower flash iron-smelting furnace and iron smelting method | |
| WO2021088710A1 (en) | Crude copper refining apparatus and refining method | |
| CN104152713A (en) | Side-blowing lead melting reduction device | |
| CN201680702U (en) | Central small furnace cover for arc furnaces | |
| CN104073652A (en) | Side-blown tin smelting device | |
| CN215356149U (en) | Ladle bottom double-blowing double-standby air brick assembly | |
| CN101839626A (en) | Small cover on center of arc furnace | |
| CN202792952U (en) | Roasting furnace for vanadium extracted from stone coal | |
| CN213570571U (en) | Electric arc furnace and bottom blowing stirring system thereof | |
| CN104894390A (en) | Method of adopting oxygen-enriched vortex bath smelting furnace for treatment of jamesonite | |
| CN204898032U (en) | Novel cadmia side -blown converter | |
| CN205152261U (en) | LF refining steel package closing means | |
| CN201680704U (en) | Small center furnace cover of electric arc furnace | |
| CN201600012U (en) | Novel oxygen lance system | |
| CN208279650U (en) | A kind of steelmaking converter forging | |
| RU2645858C2 (en) | Electric steel melting unit ladle-furnace (esu-lf) | |
| CN105823342A (en) | Metallurgical furnace | |
| CN202793008U (en) | Slag and iron discharging structure of titanium slag electric-arc furnace | |
| CN201201953Y (en) | Fused state reduction furnace for producing molten iron | |
| CN106498122B (en) | Method for smelting nickel stainless steel series by EBT electric arc furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |