Novel cooling wall structure more suitable for integrally cast blast furnace lining

Abstract

The invention discloses a novel cooling wall structure more suitable for an integral casting type blast furnace lining, and relates to the technical field of blast furnace cooling wall structures, the novel cooling wall structure more suitable for the integral casting type blast furnace lining comprises a cooling wall body, a first dovetail groove, a second dovetail groove and a third dovetail groove are formed in one side face of the cooling wall body, a through hole is formed in the other side face of the cooling wall body, and a cooling pipe is arranged in the cooling wall body. According to the novel cooling wall structure more suitable for the integrally-cast blast furnace lining, the stepped hot surface structure is more beneficial to supporting the integrally-cast blast furnace lining, so that the lining is more stable and durable, the service life of a blast furnace body is prolonged, safe production of a blast furnace is guaranteed, and due to the fact that parameters such as a water channel structure in an original brick-embedded cooling wall are not changed, the service life of the lining is prolonged. Design parameters of an original blast furnace water system do not need to be changed, and cost and time for redesigning configuration parameters of the water system are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace cooling wall structure, in particular to a new cooling wall structure more suitable for monolithic cast type blast furnace lining. BACKGROUND

[0002] At present, the design and configuration of the blast furnace body cooling equipment, in addition to the tuyere area, the furnace bottom and the furnace throat steel brick and other parts using special cooling form and equipment (generally the tuyere area uses large, medium and small cooling equipment; the furnace bottom generally buries water-cooled or air-cooled pipes, and uses water-cooled or air-cooled form; part of the furnace throat steel brick uses cavity type water-cooled structure), the cooling of other parts mostly uses the form of cooling wall cooling, and some blast furnaces will partially or completely use the cooling form of cooling plate in order to strengthen the cooling effect and better support the stability of the furnace lining structure.

[0003] In terms of the structure of the cooling wall, it can be divided into brick-inlaid cooling wall and smooth surface cooling wall according to whether the surface is inlaid with bricks. The tuyere area and the following furnace cylinder part generally uses smooth surface cooling wall, while brick-inlaid cooling wall is mostly used in the part above the tuyere area, including the bosh, belly and shaft, etc. In order to cooperate with the installation of inlaid materials (generally SiC quality refractory bricks), the hot surface of the brick-inlaid cooling wall is designed with a "dovetail groove" structure. The refractory bricks are inlaid and installed in the "dovetail groove", and after each brick-inlaid cooling wall is inlaid with all refractory bricks, it is hoisted into the furnace for installation, and after the gap between the two brick-inlaid cooling walls is filled, the brick lining structure of the blast furnace lining is formed.

[0004] For the brick lining structure of the blast furnace lining, each has advantages and disadvantages. The refractory brick is a shaped refractory material, which is pressed into a certain shape and fired at high temperature. In terms of the brick itself, it has the characteristics of high bulk density, good material density and low porosity. However, due to the relatively small volume of the refractory brick, after being inlaid into the brick-inlaid cooling wall, the cooling wall is installed on the furnace shell, and the furnace lining will form a "thousand bricks and thousand gaps" condition, especially when the gap between the bricks and the gap between the cooling walls is not properly handled, it is easy to form a coal gas leakage; at the same time, when individual bricks are damaged, broken and fall off, it is easy to cause the damage and fall off of the refractory bricks in pieces, damage the furnace type and affect the smooth running of the blast furnace.

[0005] The integral cast type blast furnace lining structure is formed by integral casting of the hot face of the cooling wall with unshaped refractory material. The integral cast type blast furnace lining structure has good integrity and good sealing, fundamentally avoids the "thousand bricks and thousand gaps" condition of the brick lining structure, is not prone to coal gas leakage, and is not prone to the condition of forming a piece of damage and falling off when an individual brick of the brick lining structure is broken. In recent years, with continuous research and technological innovation of unshaped materials, the main quality indicators such as bulk density, compressive strength and flexural strength of the unshaped materials have been greatly improved and improved. In addition, the integral casting construction is relatively simple and convenient, unlike the long manufacturing period and complex process of refractory bricks, the integral casting can greatly shorten the time required for the blast furnace to be shut down for maintenance, and the material cost is relatively low. Therefore, in recent years, more and more people choose the integral cast type furnace lining.

[0006] However, the hot face structure of the brick-inlaid cooling wall is a structure developed to adapt to the refractory bricks of the shaped material, and from the perspective of mechanical analysis or better stability and support of the castable, the hot face structure of the brick-inlaid cooling wall is not necessarily suitable for the integral cast type blast furnace lining structure. The present application solves the above problems. SUMMARY

[0007] (I) Technical problems solved In view of the deficiencies of the prior art, the present application provides a new type of cooling wall structure more suitable for the integral cast type blast furnace lining, which has the advantages mentioned above and solves the problems raised in the background art.

[0008] (II) Technical solutions To achieve the above-mentioned purpose, the present application provides the following technical solutions: a new type of cooling wall structure more suitable for the integral cast type blast furnace lining, comprising a cooling wall body, a first dovetail groove, a second dovetail groove and a third dovetail groove are respectively formed on one side of the cooling wall body, a through hole is formed on the other side of the cooling wall body, a cooling pipe is arranged in the cooling wall body, and a first sealing ring and a second sealing ring are respectively arranged on one side of the cooling wall body.

[0009] Preferably, the number of the first dovetail groove, the second dovetail groove and the third dovetail groove is several, the depth of the first dovetail groove is less than the depth of the second dovetail groove, and the depth of the second dovetail groove is less than the depth of the third dovetail groove.

[0010] Preferably, the pouring groove angle of the first dovetail groove, the second dovetail groove and the third dovetail groove is a straight structure, and the first dovetail groove, the second dovetail groove and the third dovetail groove are arranged in a stepped manner.

[0011] Preferably, the number of the first sealing ring and the second sealing ring is two, and the spacing between the two first sealing rings is greater than the spacing between the two second sealing rings.

[0012] Preferably, the position of the first sealing ring corresponds to the position of the cooling pipe, and the first sealing ring is sleeved outside the cooling pipe, and the position of the second sealing ring corresponds to the position of the through hole.

[0013] Preferably, the side of the cooling wall body is inclined, the axis of the through hole is perpendicular to the side of the cooling wall body, the cross section of the cooling pipe is U-shaped, and the axis of the cooling pipe in the cooling wall body is parallel to the side of the cooling wall body.

[0014] Compared with the prior art, the application provides a new cooling wall structure more suitable for the integral cast type blast furnace lining, and has the following beneficial effects: 1. The new cooling wall structure more suitable for the integral cast type blast furnace lining has a "step type" hot face structure, which is more conducive to the support of the integral cast type blast furnace lining, makes the lining more stable and durable, prolongs the service life of the blast furnace body, and ensures the safe production of the blast furnace. Since the water channel structure and other parameters in the original brick-inlaid cooling wall are not changed, the design parameters of the original blast furnace water system do not need to be changed, thereby saving the cost and time of redesigning the configuration parameters of the water system.

[0015] 2. The new cooling wall structure more suitable for the integral cast type blast furnace lining has a "step type" structure formed by every three "dove tail grooves", which ensures the function of the cooling wall while keeping the weight of the new cooling wall basically unchanged compared with the original brick-inlaid cooling wall, does not increase the weight and cost of the cooling wall, cancels the arc shape of the original "dove tail groove", and adopts a straight pouring groove angle structure to avoid the formation of "hollows" in the pouring process, which is conducive to heat conduction and reduces the risk of damage to the furnace lining and the cooling wall.

[0016] 3. The new cooling wall structure more suitable for the integral cast type blast furnace lining has a "step type" structure design of the hot face of the new cooling wall, which is not the same for each cooling wall, but is cross-circulating distributed in the circumferential direction and the longitudinal direction in the furnace. From the whole furnace, the hot face structure of the cooling wall forms a brand-new cross-circulating structure, which makes the combination and support of the hot face of the cooling wall to the cast furnace lining more firm and reasonable, and enhances the overall stability of the blast furnace lining. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the application; Figure 2 It is a three-dimensional oblique view structure schematic diagram of the application; Figure 3 It is a front view cross-sectional structure schematic diagram of the application; Figure 4 It is a side view structure schematic diagram of the application; Figure 5 It is a front view structure schematic diagram of the application.

[0018] In the figure: 1, the cooling wall body; 2, the first dovetail groove; 3, the second dovetail groove; 4, the third dovetail groove; 5, the through hole; 6, the cooling pipe; 7, the first sealing ring; 8, the second sealing ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0020] Embodiment 1 Please refer to Figures 1 to 5 The present application provides a technical solution: a new type of cooling wall structure more suitable for monolithic cast high furnace lining, comprising a cooling wall body 1, a first dovetail groove 2, a second dovetail groove 3 and a third dovetail groove 4 are respectively arranged on one side of the cooling wall body 1, a through hole 5 is arranged on the other side of the cooling wall body 1, a cooling pipe 6 is arranged in the cooling wall body 1, and a first sealing ring 7 and a second sealing ring 8 are respectively arranged on one side of the cooling wall body 1.

[0021] Specifically, the first dovetail groove 2, the second dovetail groove 3 and the third dovetail groove 4 are a group, one of which is appropriately shortened in depth compared with the original, one of which has the same depth as the original, and one of which is appropriately lengthened in depth compared with the original, so that the three dovetail grooves form a stepped structure.

[0022] Please refer to Figures 1 to 5 The number of the first dovetail groove 2, the second dovetail groove 3 and the third dovetail groove 4 is several, the depth of the first dovetail groove 2 is less than that of the second dovetail groove 3, and the depth of the second dovetail groove 3 is less than that of the third dovetail groove 4.

[0023] Specifically, the stepped structure design of the hot face of the new type of cooling wall cancels the original arc shape of the dovetail groove, and adopts a straight pouring groove angle structure, which is beneficial to filling the pouring material and avoiding the formation of pouring cavities.

[0024] Please refer to Figures 1 to 5 The pouring groove angle of the first dovetail groove 2, the second dovetail groove 3 and the third dovetail groove 4 is a straight structure, and the first dovetail groove 2, the second dovetail groove 3 and the third dovetail groove 4 are arranged in a stepped manner.

[0025] Specifically, the first sealing ring 7 and the second sealing ring 8 are arranged to improve the sealing performance of the connection.

[0026] Please refer to Figures 1 to 5The number of the first sealing ring 7 and the second sealing ring 8 is two, the interval between the two first sealing rings 7 is greater than the interval between the two second sealing rings 8.

[0027] Specifically, the first sealing ring 7 is arranged at the joint of the cooling pipe 6 and the cooling wall body 1, so as to seal the joint and improve the sealing performance of the cooling pipe 6.

[0028] Please refer to Figures 1 to 5 The position of the first sealing ring 7 corresponds to the position of the cooling pipe 6, and the first sealing ring 7 is sleeved outside the cooling pipe 6, and the position of the second sealing ring 8 corresponds to the position of the through hole 5.

[0029] Specifically, the distance from the cooling pipe 6 inside the cooling wall body 1 to the side of the cooling wall body 1 is approximately equal, so as to facilitate uniform heat exchange of the cooling pipe 6 and improve the cooling effect.

[0030] Please refer to Figures 1 to 5 The side of the cooling wall body 1 is inclined, the axis of the through hole 5 is perpendicular to the side of the cooling wall body 1, the cross section of the cooling pipe 6 is U-shaped, and the axis of the cooling pipe 6 inside the cooling wall body 1 is parallel to the side of the cooling wall body 1.

[0031] In use, when the novel cooling wall structure of the present application is implemented, first, the novel cooling wall is manufactured according to design requirements. When the hot face structure is processed, the first dovetail groove 2, the second dovetail groove 3 and the third dovetail groove 4 are a group, wherein the depth of the first dovetail groove 2 is appropriately shortened compared with the original dovetail groove, the second dovetail groove 3 remains the original depth, and the depth of the third dovetail groove 4 is appropriately lengthened, thereby forming a "stepped" structure, and the weight of the novel cooling wall remains basically unchanged compared with the original brick-inlaid cooling wall. The "stepped" structure design of the hot face of the novel cooling wall cancels the shape design of the original "dovetail groove". The design of the original "dovetail groove" shape has an upward arc shape at the root of the "dovetail groove". This arc shape is easy to form a pouring "hollow" at the top of the arc during pouring, which affects heat conduction, thereby accelerating the damage of the furnace lining and the cooling wall. The pouring groove angle of the novel cooling wall is a flat structure, which is beneficial to filling the entire space with pouring material and does not leave a pouring "hollow", ensuring the compactness of pouring and improving the heat conduction efficiency, thereby prolonging the service life of the furnace lining and the cooling wall. The novel structure cooling wall only replaces part of the original brick-inlaid cooling wall, and the novel cooling wall does not change the water channel structure and other parameters of the original brick-inlaid cooling wall. Therefore, the design parameters of the original blast furnace water system do not need to be changed, and important parameters such as total water quantity, water speed and cooling area remain unchanged. There is no need to redesign the water system configuration parameters, which greatly reduces the transformation cost and construction difficulty. The settings of the first sealing ring 7 and the second sealing ring 8 improve the sealing performance of the connection, and the setting of the cooling pipe 6 facilitates uniform heat exchange and cooling inside the cooling wall, thereby improving the cooling effect. This "stepped" structure design of the hot face of the novel cooling wall is not the same for every cooling wall, but is distributed in a cross-circulation manner in the circumferential direction and the longitudinal direction in the furnace. From the perspective of the whole furnace, the hot face structure of the cooling wall forms a brand-new cross-circulation structure, which makes the combination and support of the cooling wall hot face to the poured furnace lining more firm and reasonable, thereby enhancing the overall stability of the furnace lining. The novel structure cooling wall only replaces part of the original brick-inlaid cooling wall, retains other parts of the original cooling wall, reduces the transformation workload and cost, improves the feasibility and economy of the transformation, and improves the practicality.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new cooling stave structure more suitable for the lining of an integrally cast blast furnace, comprising a cooling stave body, characterized in that: A first dovetail groove, a second dovetail groove and a third dovetail groove are respectively provided on one side of the cooling wall body, a through hole is provided on the other side of the cooling wall body, a cooling pipe is provided inside the cooling wall body, and a first sealing ring and a second sealing ring are respectively provided on one side of the cooling wall body.

2. The novel cooling stave structure more suitable for the lining of an integrally cast blast furnace according to claim 1, characterized in that: There are a plurality of first dovetail grooves, a plurality of second dovetail grooves and a plurality of third dovetail grooves. The depth of the first dovetail groove is less than that of the second dovetail groove, and the depth of the second dovetail groove is less than that of the third dovetail groove.

3. The novel cooling stave structure more suitable for the lining of an integrally cast blast furnace according to claim 1, characterized in that: The casting groove angles of the first dovetail groove, the second dovetail groove and the third dovetail groove are all straight structures, and the first dovetail groove, the second dovetail groove and the third dovetail groove are arranged in a stepped manner.

4. The novel cooling stave structure more suitable for the lining of an integrally cast blast furnace according to claim 1, characterized in that: There are two first sealing rings and two second sealing rings, and the distance between the two first sealing rings is greater than the distance between the two second sealing rings.

5. The novel cooling stave structure more suitable for the lining of an integrally cast blast furnace according to claim 1, characterized in that: The position of the first sealing ring corresponds to the position of the cooling pipe, and the first sealing ring is sleeved on the outside of the cooling pipe. The position of the second sealing ring corresponds to the position of the through hole.

6. The novel cooling stave structure more suitable for the lining of an integrally cast blast furnace according to claim 1, characterized in that: The side of the cooling stave body is inclined, the axis of the through hole is perpendicular to the side of the cooling stave body, the cross section of the cooling pipe is U-shaped, and the axis of the cooling pipe located in the cooling stave body is parallel to the side of the cooling stave body.

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