Cooling device and mounting method thereof

Abstract

The invention discloses a cooling device which comprises at least two cooling walls, the cooling walls are connected with a furnace shell of a blast furnace in a sealed mode, at least four connecting water pipes are arranged on the cooling walls, and the adjacent cooling walls are connected through the connecting water pipes. The cooling water pipe at the end of the cooling wall is connected with an original cooling wall pipeline in the blast furnace and / or a cooling system pipeline penetrating through the furnace shell and outside the furnace shell; and the furnace shell drilling mechanism is used for drilling holes in the furnace shell, and the positions of the holes correspond to the positions of preformed holes in the cooling wall. The invention further discloses an installation method of the cooling device. The invention provides a cooling device and an installation method thereof, solves the technical problems of long replacement time and short service life of a cooling wall in the prior art, and ensures stable operation of a blast furnace cooling system.

Description

Technical Field

[0001] The invention belongs to the technical field of blast furnace metallurgical equipment, and in particular relates to a cooling device and an installation method thereof. Background Art

[0002] The blast furnace skin cooling device is also called the cooling water tank. It is installed on the blast furnace skin with the skin attached to the outside, supporting the refractory lining built inside. When high-temperature smelting is carried out inside the blast furnace, it quickly and effectively takes away a large amount of heat transmitted during smelting in the furnace, increases the stability of the blast furnace masonry, and makes the furnace curve meet the design requirements.

[0003] The furnace skin cooling device of a certain blast furnace has 16 layers in total, which is basically a flat rectangular block. It is installed on the outside against the furnace skin and supports the furnace lining inside. Among them, the 1st to 5th layers are in the shape of smooth panels, and the 9th to 16th layers are in the shape of bosses. They are cast iron cooling walls made of serpentine pipes bent from seamless pipes and cast with ductile iron. The 6th to 8th layers of smooth cooling walls with dovetail grooves are copper cooling walls made of pure copper plates. The cooling walls are fixed on the furnace skin with bolts, and their cooling water pipes pass through the furnace skin and are connected to the cooling system pipes outside the furnace skin.

[0004] The copper cooling staves in the 6th and 7th sections of a blast furnace total 90 pieces, with a design life of 15 years, which is beyond the service life. From March to October 2023, 9 pieces and 17 water pipes of the 6th and 7th sections of copper cooling staves were damaged and leaked, and the number and scope of damage increased month by month, causing the blast furnace to stop air 8 times without plan, which has affected the normal production of the blast furnace and needs to be replaced. How to quickly replace the cooling staves and extend the service life of the cooling staves has become a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a cooling device and an installation method thereof, which solves the technical problems of long replacement time and short service life of cooling walls in the prior art and ensures the stable operation of the blast furnace cooling system.

[0006] One aspect of the present invention provides a cooling device, comprising:

[0007] At least two cooling walls, the cooling walls are sealed and connected to the furnace shell of the blast furnace, the cooling walls are provided with at least four connecting water pipes, adjacent cooling walls are connected by the connecting water pipes, and the cooling water pipes at the ends of the cooling walls are connected to the original cooling wall pipes in the blast furnace and / or pass through the furnace shell and are connected to the cooling system pipes outside the furnace shell;

[0008] A furnace shell drilling mechanism, the furnace shell drilling mechanism is used to drill holes in the furnace shell, the positions of the holes correspond to the positions of the reserved holes on the cooling wall, the cooling wall and the furnace shell are connected through the holes, and the holes include bolt holes, positioning holes, water pipe holes, temperature measuring holes and grouting holes.

[0009] Furthermore, the furnace shell drilling mechanism comprises:

[0010] A positioning pin, the positioning pin being inserted on the furnace skin;

[0011] A positioning adjuster, the positioning adjuster is connected to the positioning bayonet;

[0012] A magnetic drill is connected to the positioning adjuster. The magnetic drill adopts a hollow drill and adopts a forced water cooling pipe to cool the hollow drill and discharge iron chips.

[0013] Furthermore, the cooling device further comprises:

[0014] A corrugated compensator, which is sleeved on the connected water pipe and connected to the furnace shell;

[0015] Positioning pins, the cooling wall is positioned with the furnace shell by the positioning pins and fixed by fixing bolts, and the positioning pins and fixing bolts are both provided with sealing covers;

[0016] A temperature measuring tube, the temperature measuring tube is inserted on the cooling wall;

[0017] A grouting pipe is inserted into the furnace shell.

[0018] Another aspect of the present invention provides a method for installing a cooling device, comprising:

[0019] Drilling holes on the furnace skin by the furnace skin drilling mechanism, wherein the positions of the holes correspond to the positions of the reserved holes on the cooling wall;

[0020] Connecting the adjacent cooling walls through the connecting water pipes, connecting the cooling water pipes at the ends of the cooling walls with the existing cooling wall pipes in the blast furnace and / or passing through the furnace shell and connecting with the cooling system pipes outside the furnace shell;

[0021] The connected cooling wall is sealed and connected to the furnace shell.

[0022] Further, drilling holes on the furnace skin by the furnace skin drilling mechanism, wherein the positions of the holes correspond to the positions of the reserved holes on the cooling wall, comprises:

[0023] Using the position of the fixing bolts on the cooling wall as the positioning point, find the marking holes of the corresponding bolt holes on the furnace skin, and then find the marking holes corresponding to the water pipe holes, positioning holes, temperature measuring holes and grouting holes on the furnace skin according to the positions of other reserved holes on the cooling wall;

[0024] According to the position measurement of the plurality of marking holes, the positions of the corresponding positioning pins are found, and the plurality of positioning pins are welded on the furnace skin;

[0025] The plurality of positioning adjusters are respectively clamped on the corresponding positioning pins, and the four bolts are adjusted so that the contact plane between the positioning adjuster and the magnetic drill meets the drilling requirements;

[0026] The magnetic drill uses a hollow drill to drill holes in the furnace shell, and uses a forced water cooling pipe to cool the hollow drill and remove iron chips. When drilling holes, the diameters of the water pipe holes and bolt holes shall not exceed 1 times the outer diameters of the connecting water pipes and the fixing bolts.

[0027] Further, the adjacent cooling walls are connected through the connecting water pipes, and the cooling water pipes at the ends of the cooling walls are connected with the original cooling wall pipes in the blast furnace and / or pass through the furnace skin to the cooling system pipes outside the furnace skin, including:

[0028] Remove the sealing gasket on the connecting water pipe;

[0029] Connecting the connecting water pipes between adjacent cooling walls through the corrugated compensator;

[0030] The cooling water pipe at the end of the cooling wall is connected to the original cooling wall pipe in the blast furnace through the corrugated compensator and / or passes through the furnace shell and is connected to the cooling system pipe outside the furnace shell.

[0031] Further, sealingly connecting the connected cooling wall and the furnace shell includes:

[0032] The dovetail groove on the cooling wall is filled with SiC filler in advance;

[0033] At least two cooling walls are sequentially positioned with the furnace shell with holes through the positioning pins, and then fixed with a plurality of fixing bolts, the positioning pins are welded and sealed with the furnace shell by a first sealing cover, and the fixing bolts are welded and sealed with a second sealing cover;

[0034] The temperature measuring tube and the furnace shell are welded and sealed;

[0035] After the cooling wall is installed, the joints of the adjacent cooling walls are compacted with SiC fillers, and then the medium-quality self-flowing material is poured and compacted between the cooling wall and the furnace shell through the grouting pipe. The bulk density after compaction is not less than 1.8g / cm 3 .

[0036] Furthermore, when the cooling wall is installed, a sealing gasket is firstly put on the protective sleeve on the connecting water pipe to prevent mud from entering the corrugated compensator;

[0037] When the cooling wall is installed, a sealing gasket is first put on the positioning pin to prevent mud from entering the sealing cover;

[0038] Before the installation of the cooling wall, a water pressure test shall be carried out at 1 to 1.5 times the working pressure, which shall last for 20 to 30 minutes and the pressure drop shall be less than 5%. After the installation is completed, the cooling wall shall be pressure tested as a whole with the cooling system.

[0039] Furthermore, when the cooling wall is installed, the installation requirements of the fixing bolts of the same cooling wall are the same tightness of 400N·m-500N·m. The two bolts at the upper end of the cooling wall are the fixing bolts, and the fixing bolts, nuts, washers and the furnace shell are all welded tightly. The two bolts at the lower end are sliding ends, and the bolts, nuts and washers are all welded tightly, but not welded to the furnace shell.

[0040] Furthermore, after the joints of the adjacent cooling walls are compacted with SiC fillers, they are aligned with soft pads, which include refractory fiber pads.

[0041] The present invention provides a method for installing a cooling device. By using a structural design of a split cooling wall composed of multiple cooling walls, segmented processing of a single cooling wall after damage is achieved, and partial damage does not affect the normal use of the remaining cooling walls, thereby extending the overall service life of the cooling wall, improving the replacement efficiency of the cooling wall, ensuring the stable operation of the blast furnace cooling system, and ensuring the normal production order of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the installation of a cooling wall in a cooling device provided by an embodiment of the present invention;

[0043] Figure 2 A schematic diagram of the structure of a cooling wall in a cooling device provided by an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of positioning of a furnace shell drilling mechanism in a cooling device provided by an embodiment of the present invention;

[0045] Figure 4 for Figure 3 A partial enlarged view of the structure shown;

[0046] Figure 5 A schematic diagram of the installation of a furnace shell drilling mechanism in a cooling device provided by an embodiment of the present invention;

[0047] Figure 6 for Figure 5 A partial enlarged view of the structure shown;

[0048] Reference numerals:

[0049] 1-Cooling wall; 2-Furnace shell; 3-Connecting water pipe; 4-Positioning pin; 5-Positioning adjuster; 6-Magnetic drill; 7-Hollow drill; 8-Forced water cooling pipe; 9-Corrugated compensator; 10-Positioning pin; 11-Temperature measuring tube; 12-Grouting pipe; 13-Fixing bolt; 14-Sealing cover; 15-Marking hole; 16-SiC filler; 17-Sealing gasket. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0052] In order to address the shortcomings of existing tightness testing equipment, the present application designs a new type of tightness testing equipment for controllable pitch propeller shafts, which can complete the tightness test of the inner oil pipes of each shaft section of the controllable pitch propeller shaft system in the indoor field in advance at the same time. This can greatly save the time of the entire assembly process of the controllable pitch propeller shaft, and save manpower and material resources.

[0053] One aspect of the present application provides a cooling device, Figure 1-2 As shown, it includes at least two cooling staves 1 and a furnace shell drilling mechanism, the cooling stave 1 is sealed and connected to the furnace shell 2 of the blast furnace, at least four connecting water pipes 3 are arranged on the cooling stave 1, adjacent cooling staves 1 are connected through the connecting water pipes 3, the cooling water pipes at the ends of the cooling staves 1 are connected to the original cooling stave 1 pipelines in the blast furnace and / or pass through the furnace shell 2 and are connected to the cooling system pipelines outside the furnace shell 2; the furnace shell drilling mechanism is used to drill holes in the furnace shell 2, the positions of the holes correspond to the positions of the reserved holes on the cooling stave 1, the cooling stave 1 is connected to the furnace shell 2 through the holes, and the holes include bolt holes, positioning holes, water pipe holes, temperature measuring holes and grouting holes.

[0054] In some embodiments, in combination Figure 3-6As shown, the furnace shell drilling mechanism includes a positioning pin 4, a positioning adjuster 5 and a magnetic drill 6, the positioning pin 4 is inserted on the furnace shell 2; the positioning adjuster 5 is connected to the positioning pin 4; the magnetic drill 6 is connected to the positioning adjuster 5, the magnetic drill 6 adopts a hollow drill 7, and a forced water cooling pipe 8 is used to cool the hollow drill 7 and discharge iron chips.

[0055] In some embodiments, in combination Figure 1-2 As shown, the cooling device also includes a corrugated compensator 9, a positioning pin 10, a temperature measuring tube 11 and a grouting pipe 12. The corrugated compensator 9 is sleeved on the connected connecting water pipe 3 and connected to the furnace shell 2, and is used to solve the problem of weld cracking and gas leakage caused by different expansion amounts caused by the temperature difference between the furnace shell 2 and the connecting water pipe 3, and to compensate for the different thermal expansion amounts of the cooling wall 1 body; the cooling wall 1 is positioned with the furnace shell 2 by the positioning pin 10, and fixed by the fixing bolt 13, and the positioning pin 10 and the fixing bolt 13 are both provided with a sealing cover 14; the temperature measuring tube 11 is inserted on the cooling wall 1; the grouting pipe 12 is inserted on the furnace shell 2.

[0056] When replacing and installing the cooling stave 1, it is necessary to check whether the original installation hole on the furnace skin 2 meets the requirements. If the old hole does not meet the requirements, it is necessary to seal the old hole, and use the cooling stave 1 template to re-mark, open holes, and install the cooling stave 1 based on the center of the fixing bolt 13 hole. Another aspect of the present invention provides a method for installing a cooling device, comprising:

[0057] Step S1: drilling holes on the furnace shell 2 by the furnace shell drilling mechanism, wherein the positions of the holes correspond to the positions of the reserved holes on the cooling wall 1;

[0058] Step S2: connecting the adjacent cooling staves 1 through the connecting water pipes 3, connecting the cooling water pipes at the ends of the cooling staves 1 with the original cooling stave 1 pipes in the blast furnace and / or passing through the furnace shell 2 with the cooling system pipes outside the furnace shell 2;

[0059] Step S3: sealingly connecting the connected cooling wall 1 and the furnace shell 2.

[0060] In some embodiments, step S1 includes drilling holes on the furnace skin 2 by the furnace skin drilling mechanism, wherein the positions of the holes correspond to the positions of the reserved holes on the cooling wall 1, and includes:

[0061] Step S11: Combination Figure 3As shown, the position of the fixing bolt 13 on the cooling wall 1 is used as the positioning point to measure in advance to find the marking hole 15 of the corresponding bolt hole on the furnace skin 2, and then the same method is used to find the marking hole 15 corresponding to the water pipe hole, positioning hole, temperature measurement hole and grouting hole on the furnace skin 2 according to the position of other reserved holes on the cooling wall 1, and spray the self-spray paint to determine the position;

[0062] Step S12: Combination Figure 3-Figure 6 As shown, the positions of the corresponding positioning pins 4 are found according to the position measurement of the plurality of marking holes 15, and the plurality of positioning pins 4 are welded on the furnace shell 2;

[0063] Step S13: Combination Figure 3-Figure 6 As shown, the plurality of positioning adjusters 5 are respectively clamped on the corresponding positioning pins 4, and the four bolts are adjusted so that the contact plane between the positioning adjuster 5 and the magnetic drill 6 meets the drilling requirements;

[0064] Step S14: Combination Figure 3-Figure 6 As shown, the magnetic drill 6 uses a hollow drill 7 to drill holes in the furnace shell 2, and uses a forced water cooling pipe 8 to cool the hollow drill 7 and discharge iron chips.

[0065] Specifically, in some embodiments, a yellow circular spray paint is sprayed on the part of the furnace shell 2 where a hole needs to be opened using a template, and the position of the positioning pin 4 is found according to the mark of the yellow circular spray paint. The position is usually a fixed value, which is determined according to the center distance between the base of the magnetic drill 6 and the drill bit. Any point on the whole circle with the yellow circular mark as the center and the center distance between the base of the magnetic drill 6 and the drill bit as the radius can be used as the welding point of the positioning pin 4. Due to the slidability of the drilling base, the position of the positioning pin 4 may also deviate. For example, the center distance between the base of the magnetic drill 6 and the drill bit used in the embodiment of the present application is 250 mm. According to the on-site conditions of the furnace shell 2, the position of the positioning pin 4 is found with a radius of 250 mm ± 10 mm with the center point of the yellow circular mark as the center, and then the magnetic drill 6 is installed for drilling.

[0066] When drilling holes, the larger the diameters of the water pipe holes and the bolt holes, the more conducive it is to fine-tuning the installation position of the cooling wall 1. However, when the water pipe hole is larger than twice the outer diameter, the furnace skin 2 between the two water pipes will be smaller, which cannot meet the stress requirements and poses a safety hazard. At the same time, the size of the bellows cannot meet the sealing requirements. Therefore, in the embodiment of the present application, the diameters of the water pipe holes and the bolt holes shall not exceed 1 times the outer diameter of the connecting water pipe 3 and the fixing bolt 13.

[0067] In some embodiments, step S2 connects the adjacent cooling staves 1 through the connecting water pipe 3, and connects the cooling water pipe at the end of the cooling stave 1 with the original cooling stave 1 pipe in the blast furnace and / or passes through the furnace shell 2 with the cooling system pipe outside the furnace shell 2, including:

[0068] Step S21: removing the sealing gasket 17 on the connecting water pipe 3;

[0069] Step S22: connecting the connecting water pipes 3 between the adjacent cooling walls 1 through the corrugated compensators 9;

[0070] Step S23: connecting the cooling water pipe at the end of the cooling wall 1 through the corrugated compensator 9 to the original cooling wall 1 pipeline in the blast furnace and / or passing through the furnace shell 2 to the cooling system pipeline outside the furnace shell 2.

[0071] In some embodiments, step S3 of sealingly connecting the connected cooling wall 1 and the furnace shell 2 comprises:

[0072] Step S31: In order to resist the mechanical scouring of the charge, Figure 2 As shown, the dovetail groove on the cooling wall 1 is filled with SiC filler 16 in advance. The SiC filler 16 has the advantages of high temperature resistance and small thermal expansion, which can improve the tolerance of the cooling wall 1, thereby increasing the service life of the cooling wall 1;

[0073] Step S32: Combination Figure 2 As shown, at least two cooling walls 1 are sequentially positioned with the furnace shell 2 with holes through the positioning pins 10, and then fixed by a plurality of fixing bolts 13. The positioning pins 10 are welded and sealed with the furnace shell 2 by a first sealing cover 14, and the fixing bolts 13 are welded and sealed by a second sealing cover 14.

[0074] Step S33: Combination Figure 2 As shown, the temperature measuring tube 11 is welded and sealed with the furnace shell 2;

[0075] Step S34: Combination Figure 2 As shown, after the cooling stave 1 is installed, the joints of the adjacent cooling staves 1 are compacted with SiC fillers 16, and then the medium-quality self-flowing material is poured and compacted between the cooling stave 1 and the furnace shell 2 through the grouting pipe 12, and the bulk density after compaction is not less than 1.8g / cm 3 The medium-quality self-flowing castable mainly plays the role of sealing, heat insulation, and thermal insulation. After the slurrying is completed, the grouting pipe 12 can be sealed to prevent the coal gas flow from scouring the cooling wall 1 during normal smelting. At the same time, it can play the role of heat insulation to prevent high-temperature heat radiation from the furnace skin 2.

[0076] Specifically, in some embodiments, the performance parameter of the castable material used is a bulk density ≥ 2.3 g / cm 2 , Al203≥60%, refractoriness≥1750℃, compressive strength≥30MPa.

[0077] Specifically, in some embodiments, in combination Figure 2 As shown, when the cooling wall 1 is installed, the protective sleeve on the connecting water pipe 3 is first covered with a sealing gasket 17 to prevent mud from entering the corrugated compensator 9.

[0078] Combination Figure 2 As shown, when the cooling wall 1 is installed, the sealing gasket 17 is firstly put on the positioning pin 10 to prevent mud from entering the sealing cover 14.

[0079] In order to meet the operation of the cooling wall 1 under extreme conditions, such as when the normal cooling water volume cannot meet the cooling effect after the smelting intensity is increased, the pressure needs to be increased by up to 1.5 times to meet the cooling requirements. Therefore, before the installation of the cooling wall 1, a water pressure test should be carried out at 1-1.5 times the working pressure. The pressure drop value <5% for 20 minutes is to check the sealing effect before air supply. If there is a leakage point, there is still time to deal with it. After the installation is completed, the cooling system is pressure tested as a whole.

[0080] Specifically, in order to ensure normal expansion and contraction under hot and cold states, one end is usually fixed and the other end can slide. The bolts, nuts, and washers are all welded tightly mainly to prevent loosening and minimize leakage. Assuming that cracks appear in the sealing cover 14 on the bolt, the bolts, nuts, and washers are all welded tightly, which will effectively reduce the leakage of the sealing cover 14 and play a secondary sealing effect. Therefore, in some embodiments, when the cooling wall 1 is installed, the installation requirements of the fixing bolts 13 of the same cooling wall 1 are the same tightness of 400N·m-500N·m. The two bolts at the upper end of the cooling wall 1 are the fixing bolts 13, and the fixing bolts 13, nuts, washers and furnace skin 2 are all welded tightly. The two bolts at the lower end are sliding ends, and the bolts, nuts, and washers are all welded tightly, but not welded to the furnace skin 2.

[0081] Specifically, in some embodiments, after the joints of adjacent cooling walls 1 are compacted with SiC fillers 16, in order to avoid excessive deviations that would cause the upper or lower cooling wall 1 to be unable to be installed, the joints need to be aligned. Alignment with soft pads is to prevent hard metal from damaging the TU2 oxygen-free copper cooling wall 1, and the soft pads include refractory fiber pads.

[0082] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0083] 1. This application uses multiple split cooling walls to replace the original cooling walls at the 6th and 7th sections above the tuyere where the smelting load is the largest. When the temperature measuring tube measures the water temperature difference and the water inlet and outlet and determines that a certain block is damaged, removing the damaged cooling wall will not have a big impact on the cooling device as a whole, and can effectively extend the service life of the cooling wall. The replacement of the split cooling wall is more convenient and quicker than before, and maintenance is more convenient.

[0084] 2. This application achieves the requirement of efficient drilling by installing multiple positioning and adjustment devices before maintenance, positioning multiple marking holes, and adopting a forced water-cooled furnace shell drilling mechanism. It takes an average of 40 minutes to complete one hole, which is more than 5 times more efficient than before.

[0085] 3. This application uses the cooling device composed of the split cooling wall to achieve segmented processing after the damage of a single cooling wall, fills the gaps of the cooling wall with special refractory materials, and uses a corrugated compensator to connect with the furnace shell, solving the problems of easy wear and easy thermal stress leakage. At the same time, efficient installation is achieved by prefabricating and installing magnetic drill positioning adjustment devices, marking holes, forced water-cooled hollow drills and other methods. It is suitable for the installation of cooling walls of various large and extra-large blast furnaces, ensuring the normal production order of the blast furnace, especially in the stable and long-life operation of the blast furnace shell cooling device, the effect is particularly significant.

[0086] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0087] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0088] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0089] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be connection, detachable connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0092] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0093] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cooling device, characterized in that: include: At least two cooling walls, the cooling walls are sealed and connected to the furnace shell of the blast furnace, the cooling walls are provided with at least four connecting water pipes, adjacent cooling walls are connected by the connecting water pipes, and the cooling water pipes at the ends of the cooling walls are connected to the original cooling wall pipes in the blast furnace and / or pass through the furnace shell and are connected to the cooling system pipes outside the furnace shell; A furnace shell drilling mechanism, the furnace shell drilling mechanism is used to drill holes in the furnace shell, the positions of the holes correspond to the positions of the reserved holes on the cooling wall, the cooling wall and the furnace shell are connected through the holes, and the holes include bolt holes, positioning holes, water pipe holes, temperature measuring holes and grouting holes.

2. The cooling device according to claim 1, characterized in that The furnace shell drilling mechanism comprises: A positioning pin, the positioning pin being inserted on the furnace skin; A positioning adjuster, the positioning adjuster is connected to the positioning bayonet; A magnetic drill is connected to the positioning adjuster. The magnetic drill adopts a hollow drill and adopts a forced water cooling pipe to cool the hollow drill and discharge iron chips.

3. The cooling device according to claim 2, characterized in that: Also includes: A corrugated compensator, which is sleeved on the connected water pipe and connected to the furnace shell; Positioning pins, the cooling wall is positioned with the furnace shell by the positioning pins and fixed by fixing bolts, and the positioning pins and fixing bolts are both provided with sealing covers; A temperature measuring tube, the temperature measuring tube is inserted on the cooling wall; A grouting pipe is inserted into the furnace shell.

4. A method for installing a cooling device according to claim 3, characterized in that: include: Drilling holes on the furnace skin by the furnace skin drilling mechanism, wherein the positions of the holes correspond to the positions of the reserved holes on the cooling wall; Connecting the adjacent cooling walls through the connecting water pipes, connecting the cooling water pipes at the ends of the cooling walls with the existing cooling wall pipes in the blast furnace and / or passing through the furnace shell and connecting with the cooling system pipes outside the furnace shell; The connected cooling wall is sealed and connected to the furnace shell.

5. The installation method according to claim 4, characterized in that: Drilling holes on the furnace skin by the furnace skin drilling mechanism, wherein the positions of the holes correspond to the positions of the reserved holes on the cooling wall, comprises: Using the position of the fixing bolts on the cooling wall as the positioning point, find the marking holes of the corresponding bolt holes on the furnace skin, and then find the marking holes corresponding to the water pipe holes, positioning holes, temperature measuring holes and grouting holes on the furnace skin according to the positions of other reserved holes on the cooling wall; According to the position measurement of the plurality of marking holes, the positions of the corresponding positioning pins are found, and the plurality of positioning pins are welded on the furnace skin; The plurality of positioning adjusters are respectively clamped on the corresponding positioning pins, and the four bolts are adjusted so that the contact plane between the positioning adjuster and the magnetic drill meets the drilling requirements; The magnetic drill uses a hollow drill to drill holes in the furnace shell, and uses a forced water cooling pipe to cool the hollow drill and remove iron chips. When drilling holes, the diameters of the water pipe holes and bolt holes shall not exceed 1 times the outer diameters of the connecting water pipes and the fixing bolts.

6. The installation method according to claim 4, characterized in that: Connecting the adjacent cooling walls through the connecting water pipes, connecting the cooling water pipes at the ends of the cooling walls with the original cooling wall pipes in the blast furnace and / or passing through the furnace skin with the cooling system pipes outside the furnace skin comprises: Remove the sealing gasket on the connecting water pipe; Connecting the connecting water pipes between adjacent cooling walls through the corrugated compensator; The cooling water pipe at the end of the cooling wall is connected to the original cooling wall pipe in the blast furnace through the corrugated compensator and / or passes through the furnace shell and is connected to the cooling system pipe outside the furnace shell.

7. The installation method according to any one of claims 4 to 6, characterized in that: Sealing the connected cooling staves to the furnace skin comprises: The dovetail groove on the cooling wall is filled with SiC filler in advance; At least two cooling walls are sequentially positioned with the furnace shell with holes through the positioning pins, and then fixed with a plurality of fixing bolts, the positioning pins are welded and sealed with the furnace shell by a first sealing cover, and the fixing bolts are welded and sealed with a second sealing cover; The temperature measuring tube and the furnace shell are welded and sealed; After the cooling wall is installed, the joints of the adjacent cooling walls are compacted with SiC fillers, and then the medium-quality self-flowing material is poured and compacted between the cooling wall and the furnace shell through the grouting pipe. The bulk density after compaction is not less than 1.8g / cm 3 .

8. The installation method according to claim 7, characterized in that: When the cooling wall is installed, a sealing gasket is firstly put on the protective sleeve on the connecting water pipe to prevent mud from entering the corrugated compensator; When the cooling wall is installed, a sealing gasket is first put on the positioning pin to prevent mud from entering the sealing cover; Before the installation of the cooling wall, a water pressure test shall be carried out at 1 to 1.5 times the working pressure, which shall last for 20 to 30 minutes and the pressure drop shall be less than 5%. After the installation is completed, the cooling system shall be pressure tested as a whole.

9. The installation method according to claim 7, characterized in that: When installing the cooling wall, the installation requirements for the fixing bolts of the same cooling wall are the same tightness of 400N·m-500N·m. The two bolts at the upper end of the cooling wall are the fixing bolts, and the fixing bolts, nuts, washers and the furnace shell are all welded tightly. The two bolts at the lower end are sliding ends, and the bolts, nuts and washers are all welded tightly, but not welded to the furnace shell.

10. The installation method according to claim 7, characterized in that: After the joints of the adjacent cooling walls are compacted with SiC fillers, they are aligned with soft pads, which include refractory fiber pads.

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