Metallurgical furnace lining structure resistant to slag corrosion

Abstract

The utility model provides a slag corrosion resistant metallurgical furnace lining structure, which comprises a slag corrosion resistant working layer, a permanent layer and a heat insulation layer, the permanent layer is arranged on the outer side of the slag corrosion resistant working layer, the heat insulation layer is arranged on the outer side of the permanent layer, and a cooling system is arranged on the outer side of the heat insulation layer. According to the metallurgical furnace lining, the refractory material with high slag corrosion resistance and the special slag corrosion resistance coating are adopted, so that the slag corrosion resistance of the metallurgical furnace lining is remarkably improved, and the service life of a metallurgical furnace is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical furnace field especially relates to a metallurgical furnace lining structure of resisting slag erosion. BACKGROUND

[0002] Metallurgical furnace, the industrial furnace that various materials or workpieces are carried out hot working treatment in metallurgical production process. Hot working treatment is the treatment process with the temperature rise of material or workpiece as important feature, for example, calcination, smelting, heating, heat treatment, drying etc. The most production links of steel metallurgy and nonferrous metallurgy cannot leave the stove.

[0003] The existing metallurgical furnace lining structure when facing the erosion of high temperature slag and flame, often there are durability, thermal stress concentration, heat loss big etc. These problems not only shorten the service life of metallurgical furnace, also influence the thermal efficiency and production efficiency of stove.

[0004] Therefore, it is very necessary to invent a metallurgical furnace lining structure of resisting slag erosion. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problem, the utility model provides a kind of metallurgical furnace lining structure of resisting slag erosion, and the technical scheme is as follows: a kind of metallurgical furnace lining structure of resisting slag erosion, including anti slag erosion working layer, permanent layer and heat insulation layer, in which: the permanent layer is provided on the outside of the anti slag erosion working layer, the heat insulation layer is provided on the outside of the permanent layer, and the cooling system is provided on the outside of the heat insulation layer;

[0006] Expansion joint is arranged between the anti slag erosion working layer and the permanent layer, and filler is arranged in the expansion joint;

[0007] A plurality of grooves are uniformly arranged on the contact surface of the permanent layer and the heat insulation layer;

[0008] A plurality of protrusions corresponding to the grooves are uniformly arranged on the contact surface of the heat insulation layer and the permanent layer, and the protrusions are embedded in the corresponding grooves;

[0009] The cooling system includes a cooling layer and a cooling water pipe, the cooling layer is connected with the heat insulation layer, the cooling water pipe is uniformly laid in the cooling layer, and the two ends of the cooling water pipe are connected with the water circulation system respectively;

[0010] A plurality of heat exchange grooves are uniformly arranged on the contact surface of the heat insulation layer and the cooling layer;

[0011] A plurality of first heat exchange fins corresponding to the heat exchange grooves are uniformly arranged on the contact surface of the cooling layer and the heat insulation layer, and the first heat exchange fins are embedded in the corresponding heat exchange grooves.

[0012] The grooves include first grooves and second grooves, which are arranged alternately on the contact surface of the permanent layer and the heat insulation layer, and the first grooves and the second grooves are communicated with each other;

[0013] The protrusions are embedded in the corresponding first grooves and second grooves.

[0014] The protrusions include first protrusions and second protrusions, which are arranged alternately on the contact surface of the heat insulation layer and the permanent layer;

[0015] The first protrusions are embedded in the corresponding first grooves;

[0016] The second protrusions are embedded in the corresponding second grooves.

[0017] The filler is provided with a bonding layer between the slag-resistant working layer and the permanent layer, and the bonding layer is made of a refractory bonding agent with high bonding strength and high temperature resistance.

[0018] The cooling layer is internally provided with heat exchange cavities, the cooling water pipes are uniformly arranged in the heat exchange cavities, and the two ports of the cooling water pipes are leaked out of the heat exchange cavities.

[0019] The surface of the cooling layer is uniformly provided with a plurality of heat dissipation holes, and the heat dissipation holes are communicated with the heat exchange cavities.

[0020] The outer side of the cooling layer is uniformly provided with a plurality of heat dissipation fins.

[0021] The surface of the cooling water pipe is uniformly provided with a plurality of second heat exchange fins, a plurality of through holes are uniformly and internally arranged on each second heat exchange fin, and the second heat exchange fins are fixedly installed in the heat exchange cavities.

[0022] A cavity is formed between every two adjacent second heat exchange fins, and each cavity is communicated with the through holes and the heat dissipation holes.

[0023] Compared with the prior art, the utility model has the advantages that:

[0024] 1. The utility model discloses a refractory material with high slag resistance and special slag-resistant coating are adopted, the slag resistance of the metallurgical furnace lining is improved, and the service life of the metallurgical furnace is prolonged.

[0025] 2. The utility model discloses an expansion joint and an embedded connection mode are arranged, and the overall stability and safety of the metallurgical furnace lining are improved.

[0026] 3. The utility model discloses an optimized cooling system and heat dissipation structure, and the thermal efficiency and production efficiency of the metallurgical furnace are further improved. DRAWINGS

[0027] Figure 1 It is the whole structure schematic diagram of the utility model.

[0028] Figure 2 It is the explosion structure schematic diagram of the utility model.

[0029] Figure 3 It is the permanent layer and heat insulation layer structure schematic diagram of the utility model.

[0030] Figure 4 It is the cooling layer local section structure schematic diagram of the utility model.

[0031] Figure 5 It is the A place local amplification structure schematic diagram of the utility model.

[0032] Figure 6 It is the B place local amplification structure schematic diagram of the utility model.

[0033] Figure 7 It is the C place local amplification structure schematic diagram of the utility model.

[0034] In the drawing,

[0035] Anti slag erosion working layer 1, permanent layer 2, expansion joint 3, filler 4, heat insulation layer 5, cooling layer 6, cooling water pipe 7, first protrusion 8, second protrusion 9, first recess 10, second recess 11, heat exchange groove 12, heat exchange cavity 13, heat dissipation hole 14, first heat exchange fin 15, heat dissipation fin 16, second heat exchange fin 17, through hole 18, cavity 19. DETAILED DESCRIPTION

[0036] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below, obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor should belong to the scope of the utility model protection.

[0037] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The utility model is further described below in combination with the drawings:

[0039] Embodiments

[0040] Reference Figures 1-7 A slag erosion resistant metallurgical furnace lining structure, comprising a slag erosion resistant working layer 1, a permanent layer 2 and a heat insulation layer 5, wherein: the slag erosion resistant working layer 1 is provided with the permanent layer 2 on the outside, the permanent layer 2 is used to protect the slag erosion resistant working layer 1 from further erosion by the external environment, the permanent layer 2 is provided with the heat insulation layer 5 on the outside, the heat insulation layer 5 is used to insulate the heat radiation and heat conduction of the high temperature in the furnace to the external structure of the furnace body, the heat insulation layer 5 is provided with a cooling system on the outside, and the cooling system is used to reduce the temperature of the furnace body and protect the structure of the furnace body;

[0041] Specifically, the slag erosion resistant working layer 1 is arranged in the metallurgical furnace and directly faces the erosion of high temperature flame and molten slag.

[0042] The slag erosion resistant working layer 1 is made of high slag erosion resistant refractory material, such as high-purity magnesium carbon brick or silicon carbide brick, and a special slag resistant coating can be sprayed on the surface to enhance the slag erosion resistance;

[0043] The permanent layer 2 is made of sintered magnesite brick or tar dolomite brick and other materials with high refractoriness and slag resistance;

[0044] The heat insulation layer 5 is made of refractory fiber blanket or calcium silicate board and other materials with excellent heat insulation performance;

[0045] The anti-slag erosion working layer 1 and the permanent layer 2 are provided with an expansion joint 3, the expansion joint 3 is used for absorbing thermal stress generated by the furnace body when the temperature changes, preventing the furnace body from cracking, and the expansion joint 3 is internally provided with a filler 4 to prevent external air and furnace gas from flowing through the gap;

[0046] Specifically, the filler 4 is made of ceramic fiber rope, ceramic fiber blanket, paperboard, plywood or polystyrene foam board and the like. These materials have good high-temperature resistance and sealing performance;

[0047] When the ceramic fiber rope is used as the filler, it should be immersed in a thin refractory slurry in advance to increase its high-temperature resistance and sealing performance. The diameter of the ceramic fiber rope should be slightly larger than the gap of the expansion joint to ensure that it can tightly fill the gap;

[0048] After the expansion joint is filled, surface treatment should be performed to ensure the flatness and sealing performance of the furnace body surface;

[0049] When the ceramic fiber rope is used as the filler, the outermost ceramic fiber rope close to the inner working wall of the furnace should be immersed in graphite slurry or refractory slurry and inserted along the brick joint, and should be kept flat with the wall surface and not protrude outward or inward;

[0050] When other fillers are used, if the filler and the inner working wall of the furnace are not flat, a high-temperature adhesive or a small amount of alumina cement can be mixed with the same short fibers to make the expansion joint and the wall flat with a trowel;

[0051] The setting method of the expansion joint 3:

[0052] Vertical expansion joint: The position, low point and high point elevation of the vertical expansion joint should be determined by setting out the line. During the masonry process, the masonry accuracy should be controlled by using the method of pulling the line or clamping the wooden template. When filling, the appropriate filling method can be selected according to the structure requirements (such as straight-through joint or zigzag joint) and the type of filler.

[0053] Horizontal expansion joint: The setting of the horizontal expansion joint should be determined according to the characteristics of the upper structure. When the upper structure is a special-shaped brick support structure, the filler should be laid flat according to the specified requirements; when the upper support structure is a brick supporting plate, the filler should be filled layer by layer.

[0054] Notes:

[0055] During the masonry process, the expansion joint should be kept clean and there should be no block-shaped materials such as construction waste.

[0056] The width of the expansion joint and the filler should meet the design requirements to ensure its high-temperature resistance and sealing performance.

[0057] When filling the expansion joint, the tightness and uniformity of the filler should be paid attention to, so as to prevent the gap leakage caused by the unreal filling.

[0058] The contact surface of the permanent layer 2 and the heat insulation layer 5 is uniformly provided with a plurality of grooves; the contact surface of the heat insulation layer 5 and the permanent layer 2 is uniformly provided with a plurality of protrusions corresponding to the grooves, and the protrusions are embedded in the corresponding grooves; the embedded connection mode is adopted between the permanent layer 2 and the heat insulation layer 5, so as to improve the stability and slag erosion resistance of the overall structure.

[0059] The cooling system comprises a cooling layer 6 and a cooling water pipe 7, the cooling layer 6 is connected with the heat insulation layer 5 in a fit manner, and the cooling water pipe 7 is uniformly laid in the cooling layer 6, so as to take away the heat by circulating cooling water, and the two ends of the cooling water pipe 7 are connected with a water circulation system respectively.

[0060] Specifically, the cooling layer 6 can be made of cast iron or copper and other materials with good heat conduction performance.

[0061] The contact surface of the heat insulation layer 5 and the cooling layer 6 is uniformly provided with a plurality of heat exchange grooves 12; the contact surface of the cooling layer 6 and the heat insulation layer 5 is uniformly provided with a plurality of first heat exchange fins 15 corresponding to the heat exchange grooves 12, and the first heat exchange fins 15 are embedded in the corresponding heat exchange grooves 12; through the arrangement of the heat exchange grooves 12 and the first heat exchange fins 15, the contact area between the heat insulation layer 5 and the cooling layer 6 can be improved, so as to better exchange heat.

[0062] In the embodiment, the grooves include first grooves 10 and second grooves 11, the first grooves 10 and the second grooves 11 are arranged in an alternating manner on the contact surface of the permanent layer 2 and the heat insulation layer 5, and the first grooves 10 and the second grooves 11 are communicated with each other; the protrusions are embedded in the corresponding first grooves 10 and second grooves 11; the protrusions include first protrusions 8 and second protrusions 9, and the first protrusions 8 and the second protrusions 9 are arranged in an alternating manner on the contact surface of the heat insulation layer 5 and the permanent layer 2; the first protrusions 8 are embedded in the corresponding first grooves 10; the second protrusions 9 are embedded in the corresponding second grooves 11; so as to improve the stability and slag erosion resistance of the overall structure.

[0063] In the embodiment, a bonding layer is arranged between the filler 4 and the slag erosion resistant working layer 1 and the permanent layer 2, and the bonding layer is made of a refractory binder with high bonding strength and high temperature resistance.

[0064] In the embodiment, the heat exchange cavities 13 are arranged in the cooling layer 6, so as to ventilate and dissipate heat, and the cooling water pipes 7 are uniformly laid in the heat exchange cavities 13, and the two ports of the cooling water pipes 7 are leaked out of the heat exchange cavities 13.

[0065] In the embodiment, a plurality of heat dissipation holes 14 are uniformly arranged on the surface of the cooling layer 6, the heat dissipation holes 14 are communicated with the inside of the heat exchange cavities 13, so as to ventilate and dissipate heat.

[0066] In the embodiment, the outer side of the cooling layer 6 is uniformly provided with a plurality of heat dissipation fins 16 to better perform air cooling.

[0067] In the embodiment, the surface of the cooling water pipe 7 is uniformly provided with a plurality of second heat exchange fins 17, each of which is uniformly provided with a plurality of through holes 18, and the second heat exchange fins 17 are fixedly installed in the heat exchange cavity 13 to perform ventilation and heat dissipation.

[0068] In the embodiment, a cavity 19 is formed between every two adjacent second heat exchange fins 17, and each cavity 19 is in communication with the through holes 18 and the heat dissipation holes 14 to perform ventilation and heat dissipation.

[0069] The technical scheme of the utility model or the technical scheme inspired by the technical scheme of the utility model by the person skilled in the art is designed to achieve the above technical effects, and falls within the protection scope of the utility model.

Claims

1. A metallurgical furnace lining structure resistant to slag erosion, characterized in that: It includes an anti-slag erosion working layer (1), a permanent layer (2) and a heat insulation layer (5), wherein: the anti-slag erosion working layer (1) is provided with a permanent layer (2) on the outside, the permanent layer (2) is provided with a heat insulation layer (5) on the outside, and a cooling system is provided on the outside of the heat insulation layer (5); An expansion joint (3) is provided between the anti-slag erosion working layer (1) and the permanent layer (2), and the expansion joint (3) is filled with a filler (4); On the contact surface between the permanent layer (2) and the heat insulation layer (5), a number of grooves are uniformly provided; On the contact surface between the heat insulation layer (5) and the permanent layer (2), a plurality of protrusions corresponding to the grooves are uniformly provided, and the protrusions are embedded in the corresponding grooves; The cooling system includes a cooling layer (6) and a cooling water pipe (7). The cooling layer (6) is bonded to the heat insulation layer (5). The cooling water pipe (7) is evenly laid in the cooling layer (6). Both ends of the cooling water pipe (7) are connected to the water circulation system. On the contact surface between the heat insulation layer (5) and the cooling layer (6), a plurality of heat exchange grooves (12) are uniformly arranged; On the contact surface between the cooling layer (6) and the heat insulation layer (5), a plurality of first heat exchange fins (15) corresponding to the heat exchange groove (12) are uniformly arranged, and the first heat exchange fins (15) are embedded in the corresponding heat exchange groove (12).

2. The slag-resistant metallurgical furnace lining structure as described in claim 1, characterized in that: The groove includes a first groove (10) and a second groove (11), which are alternately arranged on the contact surface between the permanent layer (2) and the heat insulation layer (5), and the first groove (10) and the second groove (11) are interconnected. The protrusion is embedded in the corresponding first groove (10) and second groove (11).

3. The slag-resistant metallurgical furnace lining structure as described in claim 2, characterized in that: The protrusions include a first protrusion (8) and a second protrusion (9), and the first protrusion (8) and the second protrusion (9) are alternately arranged on the contact surface between the heat insulation layer (5) and the permanent layer (2); The first protrusion (8) is embedded in the corresponding first groove (10); The second protrusion (9) is embedded in the corresponding second groove (11).

4. The slag-resistant metallurgical furnace lining structure as described in claim 1, characterized in that: An adhesive layer is provided between the filler (4) and the anti-slag erosion working layer (1) and the permanent layer (2).

5. The slag-resistant metallurgical furnace lining structure as described in claim 1, characterized in that: The cooling layer (6) has a heat exchange chamber (13) that runs through it. The cooling water pipe (7) is evenly laid in the heat exchange chamber (13), and both ends of the cooling water pipe (7) protrude from the heat exchange chamber (13).

6. The slag-resistant metallurgical furnace lining structure as described in claim 5, characterized in that: The surface of the cooling layer (6) is uniformly provided with a plurality of heat dissipation holes (14), and the heat dissipation holes (14) are connected to the interior of the heat exchange chamber (13).

7. The slag-resistant metallurgical furnace lining structure as described in claim 6, characterized in that: The outer surface of the cooling layer (6) is uniformly provided with a number of heat dissipation fins (16).

8. The slag-resistant metallurgical furnace lining structure as described in claim 5, characterized in that: The surface of the cooling water pipe (7) is uniformly provided with a number of second heat exchange fins (17), and each second heat exchange fin (17) is uniformly provided with a number of through holes (18). The second heat exchange fins (17) are fixedly installed in the heat exchange chamber (13).

9. The slag-resistant metallurgical furnace lining structure as described in claim 8, characterized in that: A cavity (19) is formed between every two adjacent second heat exchange fins (17), and each cavity (19) is connected to a through hole (18) and a heat dissipation hole (14).

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