CN211199272U - Water-cooled furnace cover of ladle refining furnace - Google Patents
Water-cooled furnace cover of ladle refining furnace Download PDFInfo
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- CN211199272U CN211199272U CN201921407253.5U CN201921407253U CN211199272U CN 211199272 U CN211199272 U CN 211199272U CN 201921407253 U CN201921407253 U CN 201921407253U CN 211199272 U CN211199272 U CN 211199272U
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Abstract
The utility model belongs to the technical field of metallurgical equipment, in particular to a water-cooled furnace cover of a ladle refining furnace, which comprises a furnace cover body; a smoke collecting hood is fixedly connected above the furnace cover body; the side wall of the smoke collecting cover is provided with a dust removing flue; the lower end of the furnace cover body is provided with an opening and is fixedly connected with a furnace opening cover skirt; the furnace cover body is in a vault shape. The furnace cover only comprises a dust removal flue connected to the side wall of the smoke collecting cover. The side wall of the fume collecting hood adopts a splayed structure. The furnace cover is formed by coiling water-cooling pipes of medium-pressure boilers with various pipe diameters; and each prepared hole for taking water from the water-cooling pipe is arranged on the main water inlet pipe. On the basis of hardly adding new accessories, the utility model not only reduces the slag sticking probability of the furnace cover body, but also cancels the bag mouth flue, and lightens the burden and the danger of the furnace cover lifting mechanism; in addition, the furnace cover has better cooling effect, is convenient to maintain and replace, and obviously reduces the cost and the labor intensity of workers.
Description
Technical Field
The utility model belongs to the technical field of metallurgical equipment, especially, relate to a ladle refining furnace water-cooling bell.
Background
The ladle refining furnace is one of main equipment for refining molten steel, the water-cooled furnace cover is a main component of the ladle refining furnace, and the effect of the molten steel refining process is greatly controlled by smelting atmosphere in the cover. At present, the furnace cover of the widely applied ladle refining furnace mostly adopts a form of steel pipes with equal diameter and close arrangement, and solves the problems of large circulation resistance, incapability of welding inner-side welding seams and frequent water leakage in an early steel plate welding form; however, because the furnace cover body and the furnace mouth skirt cover of the furnace cover adopt the double-overlapping inverted U shape, the defects of the structure are continuously shown under the updating change of high-rhythm smelting and smelting operation modes, such as serious slag adhesion problem on the inner wall of the furnace cover, particularly at corners, difficult slag removal, water leakage of a heat exchange pipe caused by improper cleaning operation, and long-time repair to influence production; once the furnace cover is not cleaned in time, a large amount of slag adhered to the furnace cover can reach hundreds of kilograms, so that the dead weight of the furnace cover is greatly increased, the burden and the danger are increased for a furnace cover lifting mechanism, and more importantly, the smelting atmosphere can not be ensured, so that the effect of refining molten steel is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a ladle refining furnace water-cooled furnace cover which can effectively reduce the slag adhesion. In order to achieve the above object, the utility model discloses the concrete technical scheme who adopts is:
a water-cooled furnace cover of a ladle refining furnace comprises a furnace cover body; a smoke collecting hood is fixedly connected above the furnace cover body; the side wall of the smoke collecting cover is provided with a dust removing flue; the lower end of the furnace cover body is provided with an opening and is fixedly connected with a furnace opening cover skirt; the furnace cover body is in a vault shape; the furnace cover only comprises a dust removal flue connected to the side wall of the smoke collecting cover; the side wall of the fume collecting hood adopts a splayed structure; the furnace cover is formed by coiling water-cooling pipes of medium-pressure boilers with various pipe diameters, and each set of water-cooling pipe comprises a cold water inlet process and a hot water return process; the water inlet of each water cooling pipe is supplied by a water distribution pipe connected with a main water inlet pipe, and the water in each water cooling pipe is heated by a furnace cover and then collected to a heated pipe, and finally discharged by a main water return pipe connected with the heated pipe for secondary utilization; the smoke collecting hood is connected with the furnace cover body through a flange.
Further, the dust removal flue is a water cooling flue.
Furthermore, each prepared hole for taking water from the water-cooling pipe is arranged on the main water inlet pipe.
The utility model discloses an advantage and positive effect do:
the utility model discloses carry out following a series of improvements on prior art water-cooled furnace lid's basis, on hardly increasing the basis of new accessory, not only simple and practical, saving cost, greatly reduced intensity of labour, gained fine effect:
1. the utility model, by arranging the double-overlapped U-shaped furnace cover body into the vault shape, not only reduces the slag sticking probability of the furnace cover body, but also increases the space in the furnace cover, increases the capacity of the furnace cover, and is convenient for collecting smoke dust in the smelting process, thereby eliminating the bag opening flue and not influencing the emission of smoke gas;
2. the elimination of the ladle opening flue relieves the burden and danger of a furnace cover lifting mechanism, reduces the equipment maintenance frequency, greatly saves the cost, more importantly ensures the smelting atmosphere and relieves the labor intensity of workers.
3. The side wall of the smoke collecting hood adopts a splayed structure, so that the smoke is favorably collected upwards to the dust removing flue, and the slag sticking probability of the inner wall of the smoke collecting hood can be reduced to the maximum extent.
4. The furnace cover is formed by medium-pressure boiler pipes with multiple pipe diameters by adopting a method of densely arranging water-cooling pipes in the prior art, the circulating water amount is large, and the cooling effect is good.
5. The preformed holes for taking water are all arranged on the main water inlet pipe; the total water inlet pipe has large pipe diameter and large corresponding circulating water amount, and has better cooling effect on the furnace cover.
6. The smoke collecting cover and the furnace cover body, the fireproof lining and the smoke collecting cover, and the furnace door mechanism and the furnace cover body are all connected by flanges, so that the connection is convenient, the maintenance and the replacement are convenient, and the interchangeability is good.
Drawings
FIG. 1 is a front view of a water cooled roof of a prior art ladle refining furnace;
FIG. 2 is a front view of a water-cooled furnace cover of a ladle refining furnace according to a preferred embodiment of the present invention;
FIG. 3 is a top view of a water cooled furnace cover of a ladle refining furnace according to a preferred embodiment of the present invention;
fig. 4 is a schematic view of the connection between the door mechanism and the furnace lid body according to the preferred embodiment of the present invention.
In the figure: 1. a furnace lid body; 2. a smoke collecting hood; 3. a dust removal flue; 4. a furnace mouth skirt; 5. a mouth flue; 6. a furnace door mechanism; 7. a refractory lining; 8. an electrode hole; 9. a heated tube; 10. a water distribution pipe; 11. a water-cooled tube; 12. a refining furnace; 13. a dust removal flue support structure; 14. a flange; 15. a main water inlet pipe; 16. a main water return pipe.
Detailed Description
FIG. 1 is a schematic view of a water cooled roof of a prior art ladle refining furnace; the water-cooled furnace cover comprises a double-overlapped U-shaped furnace cover body; in order to collect the smoke generated in the smelting process, a smoke collecting hood is fixedly connected above the furnace cover body; the side wall of the smoke collecting cover is provided with a dust removing flue; the lower end of the furnace cover body is provided with an opening and is fixedly connected with a furnace opening cover skirt; the upper end surface of the furnace mouth skirt cover is provided with a bag mouth flue; the furnace cover body in the prior art is in a shape of inverted U-shaped, most of smoke dust rising upwards below the furnace mouth skirt cover is discharged through the dust removal flue on the side wall of the smoke collecting cover, and a small part of smoke dust is discharged from the bag mouth flue at the dead angle between the furnace mouth skirt cover and the furnace cover body; however, the furnace cover has the disadvantages of serious slag adhesion, large weight of the ladle opening flue and the dedusting flue, high requirement on the supporting strength of the furnace cover and high maintenance cost.
In order to further understand the contents, features and functions of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 2, a water-cooled furnace cover of a ladle refining furnace; the furnace cover at least comprises a vault-shaped furnace cover body, the inner side of the furnace cover body is arc-shaped, so that no dead angle easy to stick slag is formed, the slag sticking probability of the inner wall of the furnace cover body is reduced, compared with a double-overlapped inverted U-shaped cover body in the prior art, the space in the cover is increased, and the capacity of the furnace cover is increased; in addition, the furnace cover only comprises a dust removal flue which is flanged on the side wall of the smoke collecting cover; a bag opening flue is cancelled; the smoke and dust can flow upwards to the smoke collecting hood along the inner side of the vault-shaped furnace cover body and is not easy to accumulate at the skirt cover of the furnace opening, so that the dust removing effect can be ensured only by using the dust removing flue and reasonably calculating the sectional area of the dust removing flue according to the smoke discharge amount on the premise of ensuring the micro-positive pressure reducing smelting atmosphere. The burden of the furnace cover can be reduced by 2-3 tons by eliminating the ladle opening flue, the burden and the danger of a furnace cover lifting mechanism are reduced, the equipment maintenance frequency is reduced, the cost is greatly saved, more importantly, the smelting atmosphere is ensured, and the labor intensity of workers is reduced. Preferably, the furnace cover body is provided with a dust removal flue supporting structure.
Preferably, the dust removal flue is a water cooling flue; the water-cooling flue can convert part of heat of the high-temperature flue gas into water temperature, and cooling water can be used by people in daily life after being converted into a high-temperature steam heat source, so that the waste heat energy source of the high-temperature flue gas is fully utilized, and the resource waste and the heat pollution are reduced; meanwhile, the water-cooling flue structure of the smelting furnace has the advantages of large heat transfer area per unit length, long service life, adjustable temperature, high flue bearing pressure and stable operation.
The furnace cover body is also provided with a furnace door mechanism, a main water inlet pipe, a main water return pipe, a lifting lug, a cylinder bracket, a flashboard device and other structures existing in the prior art; the furnace door structure and the furnace cover body are connected through flanges, so that the furnace door structure and the furnace cover body are convenient to replace quickly.
Example 2
On the basis of embodiment 1, collection petticoat pipe and bell body adopt flange joint, the convenient angle of dust removal flue on the collection petticoat pipe of online circumference adjustment, also be convenient for the change maintenance of collection petticoat pipe and dust removal flue.
In addition the collection petticoat pipe among the prior art is mostly straight wall shape, for furthest reduces the inner wall and glues the sediment probability, this embodiment the collection petticoat pipe lateral wall adopts the splayed structure, does benefit to like this not only upwards gathering the flue gas to dust removal flue, can also furthest reduce collection petticoat pipe inner wall and glue the sediment probability.
Because graphite electrodes need to be introduced into the furnace in the smelting process, the top end of the fume collecting hood is provided with a refractory lining; a plurality of electrode holes are arranged on the inner side of the refractory lining along the vertical direction; thus, the electrode can be prevented from contacting with a heating furnace cover to discharge and penetrating through the furnace cover; meanwhile, the refractory lining also has a sealing function. Preferably, for convenience of replacement and maintenance, the bottom of the refractory lining is connected with the flange at the top of the smoke collecting hood through a flange.
Example 3
On the basis of the embodiment, because different parts are heated to different degrees, the furnace cover is formed by coiling water-cooling pipes of medium-pressure boilers with various pipe diameters, and each set of water-cooling pipe comprises the processes of cold water inlet and hot water return; finally, the water in each set of water cooling pipe is supplied by a water distribution pipe connected with a main water inlet pipe, then the water in each set of water cooling pipe is heated by a furnace cover and then is collected to a heated pipe, and finally is discharged by a main water return pipe connected with the heated pipe for secondary utilization.
Example 4
In the prior art, when water flows to a water-cooling pipe on the outer side of a furnace cover, a reserved hole for taking water from the water-cooling pipe is arranged on a furnace cover body; in order to reduce the burden of the furnace cover and increase the water intake flow, each preformed hole is arranged on the main water inlet pipe; the reason is that the pipe diameter of the total water inlet pipe is preferably phi 168 x 10mm, and the corresponding circulating water amount is large and can reach 350m3/min—400m3And/min, the cooling effect on the furnace cover is better.
In a word, this bell is tried out, and is respond well: the slag removal frequency of the furnace cover is once a week, and each time the furnace cover is used for 3-4 hours; the furnace cover of the utility model can realize long-period slag removal without stopping the furnace, thereby improving the production efficiency; in addition, the smelting atmosphere in the furnace can be better ensured, so that the refining effect of the molten steel is improved; meanwhile, the maintenance intensity and the cost of the equipment are also greatly reduced.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (3)
1. A water-cooled furnace cover of a ladle refining furnace comprises a furnace cover body; a smoke collecting hood is fixedly connected above the furnace cover body; the side wall of the smoke collecting cover is provided with a dust removing flue; the lower end of the furnace cover body is provided with an opening and is fixedly connected with a furnace opening cover skirt; the method is characterized in that: the furnace cover body is in a vault shape; the furnace cover only comprises a dust removal flue connected to the side wall of the smoke collecting cover; the side wall of the fume collecting hood adopts a splayed structure;
the furnace cover is formed by coiling water-cooling pipes of medium-pressure boilers with various pipe diameters, and each set of water-cooling pipe comprises a cold water inlet process and a hot water return process; the water inlet of each water cooling pipe is supplied by a water distribution pipe connected with a main water inlet pipe, and the water in each water cooling pipe is heated by a furnace cover and then collected to a heated pipe, and finally discharged by a main water return pipe connected with the heated pipe for secondary utilization;
the smoke collecting hood is connected with the furnace cover body through a flange.
2. The water-cooled furnace cover of the ladle refining furnace as defined in claim 1, characterized in that: the dust removal flue is a water-cooling flue.
3. The water-cooled furnace cover of the ladle refining furnace as defined in claim 1, characterized in that: and each prepared hole for taking water from the water-cooling pipe is arranged on the main water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921407253.5U CN211199272U (en) | 2019-08-27 | 2019-08-27 | Water-cooled furnace cover of ladle refining furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921407253.5U CN211199272U (en) | 2019-08-27 | 2019-08-27 | Water-cooled furnace cover of ladle refining furnace |
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| CN211199272U true CN211199272U (en) | 2020-08-07 |
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| CN201921407253.5U Active CN211199272U (en) | 2019-08-27 | 2019-08-27 | Water-cooled furnace cover of ladle refining furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438293A (en) * | 2019-08-27 | 2019-11-12 | 天津天钢联合特钢有限公司 | A kind of Water-cooling furnace cover of ladle refining furnace |
-
2019
- 2019-08-27 CN CN201921407253.5U patent/CN211199272U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438293A (en) * | 2019-08-27 | 2019-11-12 | 天津天钢联合特钢有限公司 | A kind of Water-cooling furnace cover of ladle refining furnace |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 301500 Wuwei Road, economic development zone, Ninghe District, Tianjin Patentee after: Tianjin Xintian Steel United Special Steel Co.,Ltd. Address before: 301500 Wuwei Road, Ninghe Economic Development Zone, Tianjin Patentee before: TIANJIN TIANGANG UNITED SPECIAL STEEL Co.,Ltd. |
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| CP03 | Change of name, title or address |