CN201158680Y - Water cooling wall for steel making oxygen gun of electric arc furnace - Google Patents
Water cooling wall for steel making oxygen gun of electric arc furnace Download PDFInfo
- Publication number
- CN201158680Y CN201158680Y CNU2008200556756U CN200820055675U CN201158680Y CN 201158680 Y CN201158680 Y CN 201158680Y CN U2008200556756 U CNU2008200556756 U CN U2008200556756U CN 200820055675 U CN200820055675 U CN 200820055675U CN 201158680 Y CN201158680 Y CN 201158680Y
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- Prior art keywords
- oxygen
- wall
- oxygen rifle
- arc furnace
- water wall
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses a water-cool wall for an electric arc furnace steel-melting oxygen lance, on which is provided with an oxygen blowing fluxing oxygen lance host spray orifice, a burning chamber and a secondary burning oxygen-assisting spray orifice, wherein the shape of the water-cool wall on the upper portion of the oxygen jetting fluxing oxygen lance host spray orifice is projected inwards. The water-cool wall integrates the functions of oxygen jetting fluxing, foam slag producing by blowing carbon and secondary burning, improves the up and down symmetry of the burning chamber, and is beneficial for the supersonic fluid jet of the burning chamber. The furnace inner surface of the water-cool wall and the inner surface of the burning chamber which are easy to burn out are pre-protected through the surface coating way, thereby further increasing the whole service life of the water-cool wall, and the second burning spray hole structure which is arranged in a fan shape relative to a liquid level is adopted to improve the secondary burning effect.
Description
Technical field
The utility model relates to metallurgical steelmaking oxygen blowing technology, especially belong to a kind of in the electric furnace molten steel corollary apparatus of delivering oxygen.
Background technology
The furnace wall oxygen blast of modern Electric furnace steel making adopts the supersonic jet mode to become the indispensable instrument that the superpower electric furnace improves cold-zone scrap melting speed and even fusing, power supply is to improve chemical energy utilising efficiency in the steelmaking process with combining of oxygen supply, to reduce power consumption, improve combustion intensity, save the important means of cost, to improving the smelting rhythm of Electric furnace steel making, the decline significantly of production cost has very important significance.
Electric furnace oxygen rifle normally is fixed on the furnace wall of slag line top; supersonic airstream that ejects from the oxygen rifle and high-speed flame stream sheath need at first form the boundary belt that confluxes in the front end combustion chamber; improve and interfere performance mutually; improve the stability of flame jet, strengthen the concentration class and the length of supersonic speed gas jetting.The chamber structure of existing oxygen rifle flame stream has two kinds of designs, and a kind of is that oxygen rifle and combustion chamber are structure as a whole, and the position extends to form ring set formation water-cooled combustion chamber around the oxygen rifle front end, as U.S. Pat 6096261.Another kind is that oxygen rifle and combustion chamber are the branch body structure, and the oxygen rifle is fixed on the water wall, and water wall is the rectangle structure, is embedded on the furnace wall, is done by heat conductivility good metal copper usually, takes away heat by water coolant.Extending part around the oxygen rifle fixed position front end of water wall constitutes the flame chamber, as Chinese patent CN1387015A.
But the furnace interior of existing oxygen gun water-cooling cover is divided into two dimensional structure, and as illustrated in fig. 1 and 2, wherein 1 is the upper plane structure; The 2nd, the carbon dust spray orifice; The 3rd, the oxygen blast oxygen rifle main jet hole of fluxing; The 4th, the oxygen spray orifice is assisted in secondary combustion; The 5th, main oxygen rifle installation site.The oxygen flame will be injected in the molten steel; the necessary downward-sloping certain angle of oxygen rifle on the furnace wall; this has just caused the anterior extending part of oxygen rifle combustion chamber to present short long asymmetric distribution down; have influence on the performance of the protective effect of confluxing; cause departing from of flame concentration class, the water-cooled combustion chamber is born bigger scattering hot-fluid and is impacted, and is easy to cause the ablation of combustion chamber wall; simultaneously concave part, combustion chamber prolongation is easy to be subjected to the physical abuse of blanking in actual use, influences practical effect.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of electric-arc furnace steelmaking oxygen rifle water wall, and this oxygen rifle enough improves the symmetry of water wall combustion chamber with the water-cooled wall energy, can save the energy and raise the efficiency, and prolongs the oxygen rifle and uses the water wall life-span.
For solving the problems of the technologies described above, a kind of electric-arc furnace steelmaking oxygen rifle water wall of the present utility model which is provided with oxygen blast flux oxygen rifle main jet hole and combustion chamber, the auxilliary oxygen spray orifice of secondary combustion, and the flux water wall of top, oxygen rifle main jet hole of oxygen blast is shaped as inwardly protruded.
Preferably, described inwardly protruding partly is an arc surface.
Preferably, described oxygen blast is fluxed the spray angle in oxygen rifle main jet hole and furnace wall angle between 40 °～60 °.
Preferably, the auxilliary oxygen spray orifice of described secondary combustion is horizontal fan-shaped spray orifice, covering of the fan angle≤90 °, and spray angle and furnace wall angle are between 60 °～90 °.
Preferably, described combustion chamber tube wall Up Highway UHW is suitable with Down Highway length.
Preferably, described combustion chamber tube wall Up Highway UHW and Down Highway length ratio are 0.35～1.00.
Preferably, described water wall inboard scribbles one or more layers zirconium white composite deposite.
The position oxygen blast of the utility model water wall furnace interior is fluxed top, main jet hole increase bulge-structure compared with prior art; its beneficial effect is:; prolonged the length at first position, combustion chamber greatly; improve the up-down symmetry of combustion chamber; help the conflux performance of protective effect of supersonic jet; avoid departing from up and down of flame stream, improve the concentration class and the length of flame, alleviate the ablation of flame combustion chamber wall.Simultaneously, the combustion chamber is subject to blanking machinery damage location and becomes bulge-structure by concave configuration in actual use, and anti-physical abuse ability strengthens.At easy scaling loss position such as the stove internal surface of water wall and combustion chamber internal surface; adopt heat spraying method to form zirconium surface composite heat resistance protective layer; the formed coating of oxide ceramic material has good ground high temperature oxidation resisting, performance characteristics such as corrosion-resistant, wear-resistant, heat insulation.Zr0
2The series coatings applications is in the side of Electric furnace steel making copper cooling wall in the stove, spraying Zr0
2The series composite ceramic coat forms thermal insulation layer and can alleviate the suffered thermal stresses of cooling stave, simultaneously, helps dross and forms the slag protective layer, in order to heat insulation and anti-ablation, has further improved the whole service life of water wall.Employing is the secondary combustion jet orifice structure of fan-shaped layout to liquid level, improves the secondary combustion effect.
Description of drawings
Fig. 1 is existing water wall structure synoptic diagram.
Fig. 2 is Fig. 1 side sectional view.
Fig. 3 is the utility model structural representation.
Fig. 4 is Fig. 3 side sectional view.
Among the figure, the 1st, bulge-structure; The 2nd, the carbon dust spray orifice; The 3rd, the oxygen blast oxygen rifle main jet hole of fluxing; The 4th, the oxygen spray orifice is assisted in secondary combustion; The 5th, main oxygen rifle installation site.
Embodiment
As shown in Figure 3 and Figure 4, this water wall adopts integrated rectangle water-cooling structure, is made of flux oxygen rifle main jet hole 3, carbon dust spray orifice 2 and secondary combustion spray orifice 4 of oxygen blast, realizes that the carbon making foamed slag is fluxed, blown in oxygen blast and the secondary combustion combination function is an one.Above being fluxed in main jet hole 3 in the oxygen blast of furnace interior position, increase bulge-structure 1, improve the up-down symmetry of combustion chamber, help the combustion chamber supersonic jet.Water wall is towards the surface of electric arc furnace inboard; be suitable for installing the sidewall that is embedded in electric arc furnace; and contact site, furnace wall thickness according to on-site actual situations between 90～120mm; at easy scaling loss position such as the stove internal surface of water wall and combustion chamber internal surface; adopt surperficial coating processing mode to protect in advance, further improved the whole service life of water wall.In the thick line scope among the figure is oxide compound composite heat resistance protective layer; coated layer is made of one or more layers; the composition difference of each layer; the coated layer that contacts with the copper matrix preferably is made of Ni-based or cobalt base alloy; by electroplating or heat spraying method forms, the heatproof of zircite composite coating, corrosion-resistant and abrasion resistance properties are better than copper-based material, and heat conductivility will be far below the copper matrix; thereby alleviate thermal load, thermal etching and the physical abuse of copper base material, the copper matrix is formed good protective action.Carbon dust spray orifice 2, its spray angle should make its jet join mutually with main oxygen stream near metal bath surface.Oxygen blast flux oxygen rifle main jet hole 3 its spray angle of combustion chamber for downwards and the furnace wall angle between 40 °～60 °.The fan-shaped spray orifice 4 of the auxilliary oxygen of secondary combustion, about between angle smaller or equal to 90 °, spray angle downwards and the furnace wall angle between 60 °～90 °.Employing is the secondary combustion jet orifice structure of fan-shaped layout to liquid level, improves the secondary combustion effect.At the oxygen blast bulge-structure 1 that combustion chamber, the main jet hole first half increases of fluxing, the scope that the first half increases is symmetrical fully up to tube wall top and the bottom, combustion chamber length from beginning projection, be that top and the bottom bus length ratio was up to 1: 1, one of its embodiment preferred is that the top and the bottom length ratio is 0.62, see Fig. 2, top and the bottom, the combustion chamber length ratio that does not have the first half to increase projection usually is about 0.3.Because the structure of first half boss can be born than impacting that big furnace roof steel scrap falls, avoided blanking to the weak depression position physical abuse of combustion chamber Lower Half simultaneously, the combustion chamber of 5 elongated areas anterior with it, main oxygen rifle installation site is coaxial.
Claims (7)
1. electric-arc furnace steelmaking oxygen rifle water wall which is provided with oxygen blast flux oxygen rifle main jet hole and combustion chamber, the auxilliary oxygen spray orifice of secondary combustion, it is characterized in that: the flux water wall of top, oxygen rifle main jet hole of oxygen blast is shaped as inwardly protruded.
2. electric-arc furnace steelmaking oxygen rifle water wall as claimed in claim 1 is characterized in that: described inwardly protruding partly is arc surface.
3. electric-arc furnace steelmaking oxygen rifle water wall as claimed in claim 2 is characterized in that: described oxygen blast is fluxed the spray angle in oxygen rifle main jet hole and furnace wall angle between 40 °～60 °.
4. electric-arc furnace steelmaking oxygen rifle water wall as claimed in claim 3 is characterized in that: the auxilliary oxygen spray orifice of described secondary combustion is horizontal fan-shaped spray orifice, covering of the fan angle≤90 °, and spray angle and furnace wall angle are between 60 °～90 °.
5. electric-arc furnace steelmaking oxygen rifle water wall as claimed in claim 4 is characterized in that: described combustion chamber tube wall Up Highway UHW is suitable with Down Highway length.
6. electric-arc furnace steelmaking oxygen rifle water wall as claimed in claim 4, it is characterized in that: described combustion chamber tube wall Up Highway UHW and Down Highway length ratio are 0.35～1.00.
7. as claim 5 or 6 described electric-arc furnace steelmaking oxygen rifle water wall, it is characterized in that: described water wall inboard scribbles one or more layers zirconium white composite deposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200556756U CN201158680Y (en) | 2008-02-25 | 2008-02-25 | Water cooling wall for steel making oxygen gun of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200556756U CN201158680Y (en) | 2008-02-25 | 2008-02-25 | Water cooling wall for steel making oxygen gun of electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201158680Y true CN201158680Y (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200556756U Expired - Fee Related CN201158680Y (en) | 2008-02-25 | 2008-02-25 | Water cooling wall for steel making oxygen gun of electric arc furnace |
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| CN (1) | CN201158680Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634636A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Energy-saving water-cooling plate for electric furnace |
| CN102634635A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Energy-saving electric furnace |
| CN102634637A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Operation technology for electric furnace converter |
| CN103017542A (en) * | 2011-09-26 | 2013-04-03 | 铜陵佳茂雕塑铸造加工有限责任公司 | Composite ceramic water-cooled copper bush of flash furnace and production method thereof |
-
2008
- 2008-02-25 CN CNU2008200556756U patent/CN201158680Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017542A (en) * | 2011-09-26 | 2013-04-03 | 铜陵佳茂雕塑铸造加工有限责任公司 | Composite ceramic water-cooled copper bush of flash furnace and production method thereof |
| CN102634636A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Energy-saving water-cooling plate for electric furnace |
| CN102634635A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Energy-saving electric furnace |
| CN102634637A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Operation technology for electric furnace converter |
| CN102634635B (en) * | 2012-05-16 | 2013-10-16 | 中天钢铁集团有限公司 | Energy-saving electric furnace |
| CN102634636B (en) * | 2012-05-16 | 2014-02-12 | 中天钢铁集团有限公司 | Energy-saving water-cooling plate for electric furnace |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20160225 |