CN215209518U - Hot-face copper-clad strong-cooling cast iron cooling wall easy to hang slag - Google Patents
Hot-face copper-clad strong-cooling cast iron cooling wall easy to hang slag Download PDFInfo
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- CN215209518U CN215209518U CN202121372657.2U CN202121372657U CN215209518U CN 215209518 U CN215209518 U CN 215209518U CN 202121372657 U CN202121372657 U CN 202121372657U CN 215209518 U CN215209518 U CN 215209518U
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Abstract
The utility model relates to an easily hang hot side of sediment covers copper intensive cooling cast iron stave, including the cast iron stave body, and preset in a plurality of condenser tube of stave body inside side by side, cover the deoxidization copper plate of establishing certain thickness on cast iron stave body forked tail surface, and realize metallurgical bonding with the stave body, cast into the inside steel nail of forked tail, expose certain length behind the outer end passing the copper and form and easily hang the sediment steel nail, inside stave body forked tail, set up a plurality of copper post side by side along condenser tube, condenser tube is connected to the one end of copper post, and realize metallurgical bonding with condenser tube, metallurgical bonding is realized to the other end and the copper-clad plate of copper post. The utility model provides high hanging sediment ability and the cinder regeneration ability of cooling wall hot side have reduced the temperature of cooling wall hot side, even under the condition of peak heat flux density, cast iron cooling wall body temperature still is less than 450 ℃'s safe use temperature far away, has greatly prolonged the life of cast iron cooling wall body.
Description
Technical Field
The utility model relates to a blast furnace cooling device technical field especially involves blast furnace stave field, specifically indicates that the hot side of easily hanging the sediment covers copper strong cold cast iron stave.
Background
The cooling wall is important cooling equipment of a blast furnace, and currently, the cooling wall comprises a rolled copper cooling wall, a cast steel cooling wall, a grey cast iron cooling wall, a heat-resistant cast iron cooling wall and a nodular cast iron cooling wall. The grey cast iron cooling wall and the heat-resistant cast iron cooling wall are generally used for blast furnace hearth parts with relatively mild working conditions, and the nodular cast iron cooling wall and the cast steel cooling wall are generally used at the upper part of a blast furnace body. The working environment of the iron-making blast furnace slag melting zone is severe, the temperature is as high as about 2000 ℃, and the blast furnace slag melting zone needs to resist high-temperature slag iron erosion and coal gas flow scouring, so that in order to prolong the service life of the cooling wall of the zone, the slag adhering capacity and the slag crust regeneration capacity of the cooling wall of the zone need to be improved, and the cooling wall is protected by stable slag crust. The slag adhering capacity of the cooling wall and the capacity of quick regeneration after the slag crust falls off are improved, the hot surface temperature of the cooling wall is reduced, and the stability of the slag crust is improved, namely the slag crust is not easy to fall off after the slag is adhered.
As mentioned above, the use of copper staves in the area of the blast furnace slag melt strip is certainly the best option. However, practice proves that the copper cooling wall also has a plurality of defects, and the following four aspects are mainly included: firstly, copper has too good heat conduction, the comprehensive heat conduction capability is about 20-30 times of that of a nodular cast iron cooling wall, and the content of a blast furnace hearth is easy to form nodules, so that the smooth operation of a blast furnace is influenced; secondly, the copper cooling wall is too soft and is easy to wear and lose efficacy, particularly after the refractory materials in the dovetail groove are worn away, the smooth surface of the copper cooling wall is difficult to maintain the thickness of the attached slag and the stable slag crust is difficult to maintain, and under the action of strong gas flow scouring and frequently-fallen slag crust, the copper cooling wall can be worn to a water flow channel in a short time, so that the water leakage of the cooling wall is caused; thirdly, the strength of the copper cooling wall is not enough, and the copper cooling wall is easy to deform in use; fourthly, the price of the copper cooling wall is expensive, and the price per ton is about ten times of that of the cast iron cooling wall. For the reasons, copper cooling walls are abandoned by some large-scale iron-making blast furnaces at home and abroad, and the traditional nodular cast iron cooling walls or cast steel cooling walls are selected.
As a novel cooling wall, the cast steel cooling wall has been used for 20 years, but in practical application, the cast steel cooling wall gradually exits the market due to poor comprehensive heat conduction capability, unstable performance and much early damage in a high-temperature state.
Besides the copper cooling wall and the cast steel cooling wall, when the cooling wall is applied to the blast furnace slag melting belt, only the nodular cast iron cooling wall can be selected, so that a plurality of steel enterprises still exist in China, and the nodular cast iron cooling wall is still selected at the blast furnace slag melting belt.
The disadvantages of the nodular cast iron cooling wall are also obvious: firstly, the safe use temperature is low, pearlite in a cooling wall matrix stably exists at the temperature lower than 450 ℃, pearlite at the temperature higher than 450 ℃ is granulated and graphitized and expanded, so that the safe use temperature of the ductile iron cooling wall is generally considered to be not higher than 450 ℃; secondly, the comprehensive heat conduction capability is poor and is only 10W/m.k. Because of the poor heat conduction capability, the ductile iron cooling wall at the slag melting zone part is difficult to stick slag and is difficult to regenerate after the slag crust falls off. The working temperature of the ductile iron cooling wall without slag crust protection is often over 700 ℃, sometimes even over 1000 ℃, which is far higher than the safe working temperature of the ductile iron cooling wall, and the service life of the ductile iron cooling wall is greatly shortened. Obviously, the conventional spheroidal graphite cast iron stave is unsuitable for use in the blast furnace slag strip portion.
Disclosure of Invention
The utility model provides a to above-mentioned condition, provide a hot face that easily hangs sediment covers copper and strong cold cast iron stave, be applicable to the iron-making blast furnace slag melt area position.
The utility model discloses a following technical scheme realizes, provides an easily hang hot face of sediment covers copper strong cold cast iron stave, include the stave body of cast iron material and preset a plurality of condenser tubes in the stave body side by side, the hot face of stave body is equipped with a plurality of dovetails, is equipped with the copper post in the stave body between the two adjacent dovetails, and the one end of copper post extends to condenser tube, and with condenser tube's pipe wall heat conduction contact, the other end of copper post extends the hot face of stave body.
The cooling wall of this scheme is the cast iron cooling wall, has guaranteed sufficient hardness and intensity, through setting up the copper post, utilizes the good heat conductivility of copper post, has improved the cooling efficiency of condenser tube internal cooling water, has reduced being heated of cooling wall body, is favorable to prolonging the life of cooling wall, and through extending the copper post cooling wall body hot side simultaneously, the slag of being convenient for is hung, has improved the effect through slag crust protection cooling wall.
Preferably, a plurality of steel nails are cast in the cooling wall body between every two adjacent dovetail grooves, and the steel nails extend out of the hot surface of the cooling wall. According to the optimized scheme, the steel nails are arranged, so that the slag adhering capacity is further improved, and the stability of slag crust is further improved; meanwhile, through the arrangement of the steel nails and the copper columns, the flow velocity of high-temperature gas flow near the hot surface of the cooling wall body is reduced, and the abrasion of hot gas flow to the cooling wall is reduced.
And optimally, a copper plate is covered on the hot surface of the cooling wall body between every two adjacent dovetail grooves, the copper plate is penetrated by the copper columns and the steel nails, and the thickness of the copper plate is 5-80 mm. According to the optimized scheme, the copper plate is arranged, so that the heating surface of the cooling wall is completely covered by the copper plate except for the refractory material in the dovetail groove, the heat load borne by the cooling wall is transferred to the cooling water pipe in the cooling wall through the copper plate-copper column, and the heat is taken away by the cooling water in the cooling water pipe, so that the copper-clad strong-cooling cast iron cooling wall with the cooling capacity between the copper cooling wall and the cast iron cooling wall and easy slag adhering to the heating surface is formed.
As optimization, metallurgical bonding is carried out between the copper column and the pipe wall of the cold water pipe, between the copper plate and the cooling wall body and between the copper column and the copper plate. The arrangement of the optimized scheme improves the heat conduction reliability between the copper column and the pipe wall of the cold water pipe, between the copper plate and the cooling wall body and between the copper column and the copper plate, ensures the connection strength and avoids high-temperature disconnection.
As optimization, the distance between one end of the steel nail penetrating out of the copper plate and the copper plate is 1-50 mm, and the diameter of the steel nail is 3-30 mm. The steel nail of this optimization scheme sets up, has both improved and has hung the sediment effect, avoids steel nail oversize to influence the preparation and the installation degree of difficulty simultaneously again.
As optimization, the copper columns are perpendicular to the cooling water pipes and are sequentially arranged along the length direction of the cooling water pipes, and the diameter of each copper column is 10-50 mm. The optimized scheme sets the copper column and the cooling water pipe to be vertical, reduces the heat transfer length of the copper column, improves the heat transfer efficiency, realizes the multipoint cooling of the cooling water pipe by setting the diameter and the distribution mode of the copper column, and is also beneficial to the improvement of the heat transfer efficiency.
The utility model has the advantages that: the arrangement of the copper columns and the steel nails improves the slag hanging capacity of the hot surface of the cooling wall, the high heat conduction capacity of the copper plates and the copper columns is utilized, the temperature of the hot surface of the cooling wall is greatly reduced, the slag crust regeneration capacity of the hot surface of the cooling wall is improved, meanwhile, the working temperature of the cast iron cooling wall body is greatly reduced due to the armor action of the hot surface copper-clad plate, and the temperature of the cast iron cooling wall body is still far lower than the safe use temperature of 450 ℃ even under the condition of peak heat flux density, so that the service life of the cast iron cooling wall body is greatly prolonged; the invention solves the problems of high price, easy variability, easy abrasion and excessive cooling of the traditional copper cooling wall, and also solves the problems of poor cooling capability and short service life of the cast iron cooling wall.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional structural view of the present invention;
shown in the figure:
1. the cooling water pipe 2, the cooling wall body 3, the dovetail 4, the copper column 5, the copper plate 6, the steel nail 7 and the dovetail groove, and arrows in FIG. 1 show the flowing direction of the cooling water.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in figures 1 and 2, the hot surface copper-clad strong-cooling cast iron cooling wall easy to hang slag comprises a cooling wall body 2 made of cast iron and a cooling water pipe 1 arranged in the cooling wall body, wherein a plurality of dovetail grooves 7 are formed in the hot surface of the cooling wall body, a dovetail 3 is formed in the cooling wall body between every two adjacent dovetail grooves, and refractory materials are filled in the dovetail grooves.
And a copper column 4 is arranged in the cooling wall body between every two adjacent dovetail grooves, one end of the copper column 4 extends to the cooling water pipe and is in heat conduction contact with the pipe wall of the cooling water pipe, and the other end of the copper column extends out of the hot surface of the cooling wall body. In order to shorten the length of copper post, save material, further improve heat conduction efficiency, the copper post of this embodiment is perpendicular with condenser tube, and arranges in proper order along condenser tube's length direction, and the diameter of copper post is 10~50 mm.
In order to further improve the slag adhering capacity of the cooling wall, in the embodiment, a plurality of steel nails 6 are cast in the cooling wall body between two adjacent dovetail grooves, and the steel nails extend out of the hot surface of the cooling wall.
The hot face of the cooling wall body between two adjacent dovetail grooves is covered with a copper plate 5, the copper column 4 and the steel nail 6 both penetrate through the copper plate, the thickness of the copper plate is 5-80 mm, and the copper plate is a deoxidizing red copper plate. The distance between the copper plate and the one end that the steel nail wore out the copper is 1~50mm, and the diameter of steel nail is 3~30 mm.
The copper column and the wall of the cold water pipe, the copper plate and the cooling wall body, and the copper column and the copper plate are metallurgically bonded.
In the use process, except the refractory material of the dovetail groove, the heating surface of the cooling wall is completely covered by the copper plate, the heat load borne by the cooling wall is transferred to the cooling water pipe in the cooling wall through the copper plate-copper column, and the heat is taken away by the cooling water in the water pipe, so that the copper-clad strong-cooling cast iron cooling wall which has the cooling capacity between the copper cooling wall and the cast iron cooling wall and is easy to hang slag is formed on the heating surface, and the copper-clad strong-cooling cast iron cooling wall is suitable for the slag melting zone part of the iron-making blast furnace. Because the high heat conductivity of copper plate, copper post, greatly reduced the temperature of stave hot side, improved the ability of hanging the sediment and the cinder regeneration ability of stave hot side, simultaneously because the "armor" effect of hot side copper-clad plate, greatly reduced the operating temperature of cast iron stave body, even under the condition of peak heat flux density, cast iron stave body temperature still is less than 450 ℃ safe use temperature far away to greatly prolonged the life of cast iron stave body.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides an easily hang hot face of sediment covers copper and cools off cast iron stave by force, includes the stave body (2) of cast iron material and predetermines at this internal cooling water pipe (1) of stave, the hot face of stave body is equipped with a plurality of dovetail (7), its characterized in that: and a copper column (4) is arranged in the cooling wall body between every two adjacent dovetail grooves, one end of the copper column (4) extends to the cooling water pipe and is in heat conduction contact with the pipe wall of the cooling water pipe, and the other end of the copper column extends out of the hot surface of the cooling wall body.
2. The easy slag-hanging hot-face copper-clad strong cold cast iron cooling wall according to claim 1, characterized in that: and a plurality of steel nails (6) are cast in the cooling wall body between every two adjacent dovetail grooves, and the steel nails extend out of the hot surface of the cooling wall.
3. The easy slag-hanging hot-face copper-clad strong cold cast iron cooling wall according to claim 2, characterized in that: the hot face of the cooling wall body between two adjacent dovetail grooves is covered with a copper plate (5), the copper plate is penetrated by the copper column (4) and the steel nail (6), and the thickness of the copper plate is 5-80 mm.
4. The easy slag-adhering hot-face copper-clad strong cold cast iron cooling wall according to claim 3, characterized in that: the copper column and the wall of the cold water pipe, the copper plate and the cooling wall body, and the copper column and the copper plate are metallurgically bonded.
5. The easy slag-adhering hot-face copper-clad strong cold cast iron cooling wall according to claim 3, characterized in that: the distance between the copper plate and the one end that the steel nail wore out the copper is 1~50mm, and the diameter of steel nail is 3~30 mm.
6. The easy slag-hanging hot-face copper-clad strong cold cast iron cooling wall according to claim 1, characterized in that: the copper post is perpendicular with condenser tube, and arranges in proper order along condenser tube's length direction, and the diameter of copper post is 10~50 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121372657.2U CN215209518U (en) | 2021-06-21 | 2021-06-21 | Hot-face copper-clad strong-cooling cast iron cooling wall easy to hang slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121372657.2U CN215209518U (en) | 2021-06-21 | 2021-06-21 | Hot-face copper-clad strong-cooling cast iron cooling wall easy to hang slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622046A (en) * | 2022-02-10 | 2022-06-14 | 李宇 | Blast furnace cast copper cooling wall |
| CN117587178A (en) * | 2023-11-27 | 2024-02-23 | 秦冶工程技术(北京)有限责任公司 | Blast furnace cooling wall |
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2021
- 2021-06-21 CN CN202121372657.2U patent/CN215209518U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622046A (en) * | 2022-02-10 | 2022-06-14 | 李宇 | Blast furnace cast copper cooling wall |
| CN117587178A (en) * | 2023-11-27 | 2024-02-23 | 秦冶工程技术(北京)有限责任公司 | Blast furnace cooling wall |
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