Trolley furnace coil base, manufacturing process of trolley furnace coil base and trolley furnace

Abstract

The invention belongs to the technical field of heat treatment, and particularly relates to a trolley furnace coil base, a manufacturing process thereof and a trolley furnace. The hearth of the trolley furnace comprises a bearing platform, a steel coil base, a sealing steel ring, a steel ring protection module, a fixed steel ring and a heat insulation module. According to the coil base structure, the independent bearing platform is adopted, the coil base and the trolley bearing beam are separated, and deformation caused by thermal stress to a trolley furnace bearing component (the main bearing beam) is counteracted; the sealing steel ring adopts a corrugated structure and is subjected to pouring protection, so that the sealing steel ring is not easy to oxidize and the service life is greatly prolonged; the stability of the steel coil base is improved, and the service life of the steel coil base is prolonged through brick type structure arrangement of the steel coil base, material type selection adjustment, brick type optimization of weak and vulnerable positions of the outer ring of the base, design of a fixed steel ring for protecting the steel coil base and the like; the arrangement of the refractory material of the base plate layer reduces the risk of breakage and damage of the refractory bricks and weakens the deformation of the steel tray caused by thermal stress.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment, and in particular relates to a trolley furnace platform and a manufacturing process thereof, and a trolley furnace. Background Art

[0002] The trolley furnace for high-temperature annealing of oriented silicon steel generally directly builds the furnace platform on the upper panel of the trolley steel structure load-bearing component in contact with the bottom track of the car. Under the high temperature and heavy load conditions of the high-temperature annealing process of silicon steel coils, the refractory materials and steel structures have different degrees of thermal expansion deformation and cooling contraction. Especially under the highest temperature conditions, the bottom frame of the trolley is deformed and warped, and the wheels of the trolley are off the track at the location where the local thermal deformation is serious; the expansion and contraction of refractory materials, the erosion of the complex atmosphere in the furnace, and the impact of the lifting of steel coils and trays can easily cause damage to the furnace platform structure, such as oxidation of the sealing steel ring, loosening, displacement, and cracking of refractory bricks, which in turn affects the flatness of the furnace platform and cannot meet the normal high-temperature annealing process standards of oriented silicon steel, requiring high-frequency maintenance and repair by professionals; on the other hand, the loosening and displacement of the refractory bricks on the furnace platform causes the horizontality of the silicon steel coil bearing surface of the furnace platform to change, resulting in deformation of the steel tray, which brings great maintenance costs to the production and manufacturing of enterprises. Summary of the invention

[0003] The present invention aims to solve the above problems and provides a trolley furnace table, which can avoid the occurrence of problems such as thermal deformation of the trolley furnace load-bearing parts, oxidation of the sealing ring and deformation and failure of the refractory materials, reduce the maintenance frequency of the furnace table and increase the service life of the furnace table.

[0004] According to the technical solution of the present invention, the trolley furnace table includes: The load-bearing platform is installed on the load-bearing components of the trolley furnace, including a load-bearing frame and a panel; The steel coil base is installed on the bearing platform, and includes a fire-resistant insulation layer, an insulating buffer layer, a light brick layer, a heavy brick layer, a support layer and a pad layer arranged in sequence from bottom to top; the insulating buffer layer and the light brick layer, and the bricks used to build the light brick layer, the heavy brick layer, the support layer and the pad layer are connected by a mortar joint layer; A sealing steel ring is vertically arranged on the outer periphery of the steel coil base; A steel ring protection module is arranged around the steel coil base and covers the sealing steel ring, comprising a first heat-insulating bottom layer and a steel ring protection casting layer, wherein a sand sealing groove is formed between the steel ring protection casting layer and the steel coil base; A fixed steel ring, arranged around the outside of the steel coil base; The heat-insulating module is arranged around the steel ring protection module and covers the bearing platform, and includes a second heat-insulating bottom layer, a heat-insulating casting layer and a refractory brick layer which are arranged in sequence from bottom to top.

[0005] Furthermore, a plurality of positioning and mounting holes are provided on the panel, and the positioning and mounting holes are arranged in one-to-one correspondence with the positioning pieces on the load-bearing component.

[0006] Furthermore, there are at least four positioning and mounting holes, which are distributed at the four corners of the panel; and the positioning member is a positioning pin.

[0007] Furthermore, the load-bearing frame includes a plurality of cross beams and longitudinal beams that are perpendicularly arranged to each other, and the cross beams and longitudinal beams are welded to form a rectangular frame structure.

[0008] Furthermore, the longitudinal beam is a carbon steel plate, and the cross beam is a C14 channel steel.

[0009] Furthermore, the refractory insulation layer is cast and built by refractory materials, and specifically, high-strength and high-aluminum refractory castables can be selected; the thermal insulation buffer layer can be made of high-density thermal insulation fiberboard; the edge of the refractory insulation layer protrudes upward and wraps the edge of the thermal insulation buffer layer.

[0010] Furthermore, the thickness of the fire-resistant insulation layer is 45-55 mm, and the thickness of the insulation buffer layer is 35-45 mm.

[0011] Furthermore, the thickness of the lightweight brick layer is 220-260 mm, including at least three layers of lightweight bricks, and specifically lightweight mullite bricks can be used.

[0012] Furthermore, the thickness of the heavy brick layer is 200-240mm, the middle part of the heavy brick layer includes at least two layers of flat bricks, and the edge is a circle of vertical bricks, the height of the vertical bricks is consistent with the overall height of the heavy brick layer; the flat bricks and vertical bricks can specifically be high-aluminum heavy bricks.

[0013] Furthermore, the flat bricks are arranged in a ring shape, and circumferential expansion joints are left between the flat bricks in the two outermost circles and / or between the flat bricks in the outermost circle and the vertical bricks, and the expansion joints are filled with refractory fillers.

[0014] Furthermore, the width of the expansion joint is 10-15 mm.

[0015] Furthermore, the expansion joints are at least two layers, corresponding to the level of the flat bricks; the diameter of the expansion joints corresponding to the upper flat bricks is larger than the diameter of the expansion joints corresponding to the lower flat bricks. Specifically, the flat bricks can be two layers, with expansion joints between the flat bricks and the vertical bricks in the outermost circle of the upper layer (the expansion joints corresponding to the upper flat bricks have a larger diameter), and expansion joints between the flat bricks in the outermost two circles of the lower layer (the expansion joints corresponding to the lower flat bricks have a smaller diameter).

[0016] Furthermore, the refractory filler may be zirconium-containing refractory fiber wool.

[0017] Furthermore, the thickness of the support layer is 350-450 mm, including at least two layers of support bricks, and mutually matching bite structures and notches are provided between the support bricks at different levels and between the support bricks at the bottom layer and the heavy brick layer. The support bricks can specifically be high-strength high-alumina bricks.

[0018] Furthermore, the engaging structure may be provided on the lower surface of the supporting brick, and the notch may be provided on the upper surface of the supporting brick and the heavy brick layer.

[0019] Furthermore, the thickness of the pad layer is 100-120 mm, and includes a plurality of pad bricks with fan-shaped structures. The plurality of pad bricks with fan-shaped structures are spliced ​​on the supporting layer to form a perfect circle. Specifically, the pad bricks can be made of high-strength high-alumina bricks.

[0020] Furthermore, the thickness of the mortar seam layer is 1-3 mm.

[0021] Furthermore, the cross section of the sealing steel ring is corrugated. Specifically, the sealing steel ring can be a corrugated structure.

[0022] Furthermore, the first thermal insulation bottom layer may be made of thermal insulation calcium silicate board.

[0023] Furthermore, the bottom height of the sand sealing groove may be consistent with the middle height of the lightweight brick layer. When the sand sealing groove is in use, the interior is filled with sealing sand, and the sealing sand may specifically be quartz sand.

[0024] Furthermore, the bottom of the fixed steel ring is consistent with the bottom height of the sand sealing groove, and the top is higher than the upper surface of the heavy brick layer; specifically, the top of the fixed steel ring is 1-2 cm higher than the upper surface of the heavy brick layer.

[0025] Furthermore, the second thermal insulation bottom layer may be made of thermal insulation calcium silicate board, the refractory brick layer may be three layers, the lower two layers are thermal insulation bricks, and the surface layer is special shaped high-alumina bricks.

[0026] Furthermore, the second thermal insulation bottom layer and the first thermal insulation bottom layer may be an integral structure, and the thermal insulation casting layer and the steel ring protection casting layer may be an integrally formed structure.

[0027] The second aspect of the present invention provides a manufacturing process of the above-mentioned trolley furnace platform, comprising the following steps: S1: Install the load-bearing platform obtained by welding the load-bearing frame and the panel onto the load-bearing components of the trolley furnace; S2: Draw a reference circle for positioning on the panel of the bearing platform, and install a positioning guide tube at the center of the reference circle; S3: Weld the sealing steel ring to the panel according to the reference circle positioning; S4: positioning and installing the casting mold according to the reference circle and casting to obtain a fire-resistant insulation layer; S5: remove the casting mold and lay a heat-insulating buffer layer on the surface of the fire-resistant insulation layer; S6: Lay a light brick layer and a heavy brick layer in sequence; S7: Lay the first insulation bottom layer and the second insulation bottom layer, place the mold after the laying is completed, and cast the steel ring protection casting layer and the insulation casting layer, remove the mold after the casting is completed, and lay a refractory brick layer on the insulation casting layer; S8: Install the fixed steel ring; S9: baking the completed furnace structure; S10: Lay the support layer and the pad layer in sequence; S11: Baking is performed again to complete the manufacture of the trolley furnace table.

[0028] Furthermore, in step S6, when laying the heavy brick layer, the vertical bricks are laid during the laying of the first layer of flat bricks; during the laying of the heavy brick layer, expansion joints are reserved between the vertical bricks and the flat bricks, and between the two outermost circles of flat bricks.

[0029] Furthermore, in step S8, when installing and fixing the steel ring, the steel ring is cut open and the steel coil base is tightened by auxiliary equipment, and then welding reinforcement is performed.

[0030] A third aspect of the present invention provides a trolley furnace, comprising the trolley furnace table described above or the trolley furnace table manufactured by the above manufacturing process.

[0031] Compared with the prior art, the technical solution of the present invention has the following advantages: the furnace table structure of the present invention adopts an independent bearing platform to separate the furnace table from the trolley load-bearing beam, thereby offsetting the deformation of the trolley furnace load-bearing components (main load-bearing beam) caused by thermal stress; the sealing steel ring adopts a corrugated structure and is cast for protection, which is not easy to be oxidized and has a greatly improved service life; the brick-type structure layout of the steel coil base, material selection and adjustment, and optimization of the brick type at the weak and vulnerable parts of the outer ring of the base, and the design of a fixed steel ring to protect the steel coil base, etc., improve the stability and service life of the steel coil base; the arrangement of refractory materials in the pad layer reduces the risk of rupture and damage of refractory bricks and weakens the deformation of the steel material tray caused by thermal stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the carrying platform of the present invention.

[0033] Figure 2 It is a structural schematic diagram of the steel coil base of the present invention.

[0034] Figure 3 for Figure 2 A magnified view of the structure in the middle.

[0035] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.

[0036] Figure 5 It is a schematic diagram of the structure of the support layer in the steel coil base of the present invention.

[0037] Figure 6 It is a schematic diagram of the structure of the pad layer in the steel coil base of the present invention.

[0038] Figure 7 It is a schematic structural diagram of the sealing steel ring of the present invention.

[0039] Figure 8 It is a structural schematic diagram of the trolley furnace of the present invention.

[0040] Fig. 9 This is a specific temperature rise-fall curve for step S9 in Example 1.

[0041] Fig.10 The low temperature baking curve of step S11 in Example 1 is as follows Figure 4 shown.

[0042] Fig.11 This is a schematic diagram of the decoupling strand of the furnace in comparative example 1.

[0043] Description of the accompanying drawings: 100-bearing platform, 110-bearing frame, 111-crossbeam, 112-longitudinal beam, 120-panel, 121-positioning and mounting hole, 122-center hole, 123-temperature measuring tube hole, 124-pressure measuring tube hole, 125-air outlet, 200-steel coil base, 210-refractory insulation layer, 220-insulating buffer layer, 230-light brick layer, 231-light brick, 240-heavy brick layer, 241-flat brick, 242-vertical brick, 243-expansion joint, 250-support layer, 251-support brick, 252-occlusal structure, 253-notch, 260-pad Layer, 261-pad brick, 270-mortar joint layer, 300-sealing steel ring, 400-steel ring protection module, 410-first thermal insulation bottom layer, 420-steel ring protection casting layer, 430-sand sealing groove, 500-fixed steel ring, 600-insulation module, 610-second thermal insulation bottom layer, 620-insulation casting layer, 630-refractory brick layer, 631-insulation brick, 632-surface refractory brick, 700-load-bearing components, 710-positioning parts, 800-sealing sand, 900-intake pipe, 1000-steel tray, 1100-steel coil, 1200-inner cover, 1300-trolley drive motor. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0045] The present invention provides a trolley furnace platform, such as Figure 8 As shown, it includes a carrying platform 100, a steel coil base 200, a sealing steel ring 300, a steel ring protection module 400, a fixing steel ring 500 and a heat insulation module 600.

[0046] The bearing platform 100 is installed on the load-bearing component 700 of the trolley furnace, on which the steel coil base 200 is installed, and specifically two can be installed. Figure 1 As shown, the supporting platform 100 includes a supporting frame 110 and a panel 120; a center hole 122 is opened on the panel 120 at a position corresponding to the center of the steel coil base 200 for installing the air inlet pipe 900; to facilitate the installation of the temperature measuring tube, the pressure measuring tube and the air outlet, a temperature measuring tube hole 123, a pressure measuring tube hole 124 and an air outlet hole 125 are also opened at corresponding positions on the panel 120.

[0047] The panel 120 may be made of a low alloy steel plate, and may be provided with a plurality of positioning holes 121, which are arranged one by one in correspondence with the positioning members 710 on the load-bearing component 700. The panel 120 is positioned and installed on the load-bearing component 800 by the cooperation between the positioning holes 121 and the positioning members 810. Specifically, there may be four positioning holes 121, which are distributed in a rectangular shape and are respectively located on both sides of the two center holes 122, and the positioning members 810 may be positioning pins.

[0048] In one embodiment, the load-bearing frame 110 includes a plurality of cross beams 111 and longitudinal beams 112 that are perpendicularly disposed to each other. The cross beams 111 and longitudinal beams 112 are welded to form a rectangular frame structure; wherein the cross beams 111 are C14 channel steels, and the longitudinal beams 112 are carbon steel plates.

[0049] The steel coil base 200 is a material receiving platform, which is installed on the bearing platform 100. Figure 2 As shown, it includes a refractory insulation layer 210, an insulating buffer layer 220, a lightweight brick layer 230, a heavy brick layer 240, a support layer 250 and a pad layer 260 which are arranged in sequence from bottom to top; the insulating buffer layer 220 and the lightweight brick layer 230, as well as the bricks used to build the lightweight brick layer 230, the heavy brick layer 240, the support layer 250 and the pad layer 260 are connected by a mortar joint layer 270.

[0050] Specifically, the refractory heat-insulating layer 210 is cast and built by refractory materials, and its material can be selected from high-strength high-aluminum refractory casting materials, which have high strength and certain heat insulation effect, and directly act on the panel 120 of the bearing platform 100, which is convenient for construction and prevents heat conduction to the steel structure. The thickness of the refractory heat-insulating layer 210 is 45-55mm, for example, it can be 45mm, 48mm, 50mm, 52mm, 55mm, etc.

[0051] The heat-insulating buffer layer 220 can be made of high-density heat-insulating fiberboard, which has a compressive strength more than ten times that of conventional ceramic fiberboard and excellent heat-insulating performance, isolating the heat transfer in the furnace while reducing the impact of the vibration of the trolley in and out on the refractory bricks. The thickness of the heat-insulating buffer layer 220 is 35-45 mm, for example, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, etc.

[0052] In one embodiment, the edge of the refractory insulation layer 210 protrudes upward and wraps the edge of the insulation buffer layer 220, that is, the insulation buffer layer 220 is laid in the groove formed on the upper surface of the refractory insulation layer 210, which can play a certain protective role for the insulation buffer layer 220.

[0053] The lightweight brick layer 230 can be made of lightweight mullite bricks with high refractoriness for isolating heat transfer in the furnace. The thickness is 220-260 mm, for example, 220 mm, 230 mm, 340 mm, 250 mm, 260 mm, etc.

[0054] In one embodiment, the lightweight brick layer 230 includes three layers of lightweight bricks 231. Each layer of lightweight bricks 231 is laid in a circular manner, and staggered joints are performed between layers. It is conceivable that the number of layers of lightweight bricks 231 in the lightweight brick layer 230 can be adjusted according to actual needs.

[0055] Heavy brick layer 240 uses high-aluminum heavy bricks with high strength and good thermal shock resistance to bear and resist the erosion of the complex atmosphere in the cover and the alternating hot and cold impact of the trolley moving in and out. The aluminum content of high-aluminum heavy bricks is more than 60%, the iron content is less than 1.5%; the volume density is 2.4g / cm 3 Above, the compressive strength at room temperature is greater than 55MPa.

[0056] Considering that the outer ring of the furnace table is relatively weak and easy to deform and shift, a large-sized vertical brick 242 is designed at the largest outer diameter of the heavy brick layer 240 to prevent the bricks of the outer ring heavy brick layer 240 from relative displacement and settlement collapse, and a circumferential expansion joint 243 is reserved, and the expansion joint 243 is filled with refractory fillers, such as zirconium-containing refractory fiber wool.

[0057] Specifically, the height of the vertical bricks 242 is consistent with the overall height of the heavy brick layer 240, and the outer circle formed by the vertical bricks 242 is formed by at least two layers of flat bricks 241, and each layer of flat bricks 241 is laid in a circular manner, and the layers are staggered. It is conceivable that the number of layers of flat bricks 241 can be adjusted according to actual needs.

[0058] The expansion joint 243 is arranged between the vertical brick 242 and the outermost circle flat brick 241 or between the outermost two circles of flat bricks 241. The number of expansion joints 243 corresponds to the level of the flat bricks 241, and the diameter of the expansion joint 243 corresponding to the upper flat brick 241 is larger than the diameter of the expansion joint 243 corresponding to the lower flat brick 241.

[0059] In one embodiment, the flat bricks 241 are two layers, and expansion joints 243 are left between the flat bricks 241 and the vertical bricks 242 in the outermost circle of the upper layer, and between the flat bricks 241 in the outermost two circles of the lower layer. The width of the expansion joints 243 is 10-15 mm, for example, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc.

[0060] The support layer 250 includes at least two layers of support bricks 251, such as Figure 5 As shown, each layer of support bricks 251 is arranged in a circular and dispersed manner, including long bricks and short bricks arranged alternately. The support bricks 251 can be made of high-strength high-aluminum bricks, which have excellent pressure resistance and bending resistance. The thickness of the support layer 250 is 350-450mm, for example, 350mm, 380mm, 400mm, 420mm, 450mm, etc.

[0061] like Figure 4 As shown, the interlocking structures 252 and notches 253 that cooperate with each other are arranged between the support bricks 251 of different layers and between the support bricks 251 of the bottom layer and the heavy brick layer 240 to prevent the bricks from moving and increase stability for supporting the steel coil. Specifically, the interlocking structure 252 is arranged on the lower surface of the support brick 251, and the notch 253 can be arranged on the upper surface of the support brick 251 and the heavy brick layer 240 (the uppermost flat brick 241).

[0062] like Figure 6 As shown, the backing plate layer 260 includes a plurality of backing plate bricks 261 of fan-shaped structure, which are arranged on the support layer 250 to form a perfect circle, so as to enhance the stability of the furnace and increase the force-bearing area of ​​the steel material tray and the refractory bricks, thereby slowing down the deformation of the steel material tray due to heat. The thickness of the backing plate layer 260 is 100-120 mm, for example, 100 mm, 105 mm, 110 mm, 115 mm, 120 mm, etc. The backing plate bricks 261 can be made of high-strength high-alumina bricks.

[0063] The thickness of the mortar joint layer 270 is 1-3mm, and it is required to be set between each layer of masonry bricks (light brick layer 230, heavy brick layer 240, support layer 250, pad layer 260) and between lightweight brick layers 230. High-quality fire clay with low porosity and medium bonding strength is selected. Low porosity and small load-bearing compression are required. The size of the gap is controlled to be uniform during masonry layer by layer, and the layers of furnace bricks are not easily deformed, thereby ensuring the flatness of the steel coil base 200.

[0064] The sealing steel ring 300 is vertically arranged on the outer periphery of the steel coil base 200 to protect the furnace bricks and prevent the base bricks (light brick layer 230 and heavy brick layer 240) from loosening. At the same time, it can prevent the sealing sand 800 filled in the sand sealing groove 430 from penetrating into the brick seams of the base bricks, thereby extending the service life of the furnace. like Figure 7 As shown, the cross section of the sealing steel ring 300 is corrugated, for example, it can be a corrugated structure. The sealing steel ring 300 of this structure can reduce the influence of the expansion and deformation caused by the high temperature thermal stress in the furnace, effectively prevent the atmosphere in the cover from leaking out, and protect the refractory material of the furnace platform. The material of the sealing steel ring 300 can be heat-resistant steel, specifically 310S heat-resistant steel.

[0065] The steel ring protection module 400 is arranged around the steel coil base 200 and covers the sealing steel ring 300, including a first heat insulation bottom layer 410 and a steel ring protection casting layer 420, and a sand sealing groove 430 is formed between the steel ring protection casting layer 420 and the steel coil base 200. Among them, the first heat insulation bottom layer 410 can be made of heat insulation calcium silicate board; the steel ring protection casting layer 420 can be made of high-purity mullite anti-stripping casting material, which casts and protects the sealing steel ring 300, effectively isolating the oxidation corrosion of the sealing steel ring 300 by the open flame and smoke in the furnace, and improving the service life of the sealing steel ring 300. The sand sealing groove 430 is filled with sealing sand 800, for example, quartz sand.

[0066] The fixed steel ring 500 is arranged around the outside of the steel coil base 200. The bottom of the fixed steel ring 500 is consistent with the bottom height of the sand sealing groove 410, and the top is higher than the upper surface of the heavy brick layer 240 (such as Figure 3 In one embodiment, the top of the fixing steel ring 500 is 1-2 cm higher than the upper surface of the heavy brick layer 240 .

[0067] The heat-insulating module 600 is arranged around the steel ring protection module 400 and covers the bearing platform 100, forming a seal with the side wall of the furnace wall to insulate heat, and includes a second heat-insulating bottom layer 610, a heat-insulating casting layer 620 and a refractory brick layer 630 arranged in sequence from bottom to top.

[0068] The second insulation bottom layer 610 may be made of insulation calcium silicate board; the insulation casting layer 620 may be made of insulation casting material; the refractory brick layer 630 includes at least two layers of insulation bricks 631 laid on the insulation casting layer 620, and surface refractory bricks 632 laid on the insulation bricks 631. The surface refractory bricks 632 may be special shaped high-alumina bricks.

[0069] In one embodiment, the second thermal insulation bottom layer 610 and the first thermal insulation bottom layer 410 are an integral structure, and the thermal insulation casting layer 620 and the steel ring protection casting layer 420 can be integrally cast.

[0070] The above-mentioned trolley furnace platform can be prepared by the following manufacturing process: S1: welding the carrying frame 110 and the panel 120 to obtain the carrying platform 100, and hoisting the carrying platform 100 onto the load-bearing component 700 of the trolley furnace for installation; S2: Draw a reference circle for positioning on the panel 120 of the carrying platform 100, install a positioning guide tube at the center of the reference circle, confirm the installation position of the sealing steel ring 300 and the steel coil base 200, and ensure the roundness; S3: Weld the sealing steel ring 300 to the panel 120 according to the reference circle positioning, perform circumferential welding on the inner and outer rings according to the corrugated shape of the sealing steel ring 300, check the appearance quality of the weld, and perform a 100% airtight inspection on the weld to prevent the protective property inside the cover from escaping outwards; S4: Install the steel casting mold according to the reference circle and construct the first casting layer. Control the level of the upper surface of the casting layer. The surface must be smooth without defects such as peeling, cracks, holes, etc. After the casting layer is completed, natural curing is carried out for at least 24 hours. When the ambient temperature is low, low-temperature baking is considered to increase the ambient temperature to obtain a fire-resistant insulation layer 210; S5: removing the casting mold and laying the heat insulating buffer layer 220 on the surface of the fireproof heat insulating layer 210; S6: Lay the light brick layer 230 and the heavy brick layer 240 in sequence, using a circular laying method, from the outside to the inside, and proceed in a circle. The bricks between the layers are staggered to control the uniform size of the brick mortar joints and the fullness of the mortar. When laying each layer of bricks, the roundness and verticality with the bottom surface must be ensured. After laying, use a horizontal ruler to check the flatness of the end surface; when laying the heavy brick layer 240, the outer circle of vertical bricks 242 is completed first when the first layer of flat bricks 241 is laid, and expansion joints 243 are reserved as required; S7: Lay the first insulation bottom layer 410 and the second insulation bottom layer 610. After the laying is completed, place the mold and cast the steel ring protection casting layer 420 and the insulation casting layer 620. After the casting is completed, perform natural curing for at least 24 hours, remove the mold and lay the refractory brick layer 630 on the insulation casting layer 620; S8: Install the fixed steel ring 500. Starting from the bottom layer of the sand sealing groove 430, the fixed steel ring 500 is tightly clamped on the outer circumference of the steel coil base 200 and 1-2 cm higher than the surface of the heavy brick layer 240. To ensure a certain clamping force, the fixed steel ring 500 can be cut open and tightened with auxiliary equipment on the steel coil base 200, and then welded for reinforcement. S9: The completed furnace structure is baked according to a specific temperature rise-fall curve to remove moisture from the masonry, and the fire mud between the masonry layers is sintered to form a mortar joint layer 270 to ensure that the masonry reaches the best performance strength; S10: Lay the support layer 250 and the pad layer 260 in sequence. Before the support layer 250 is laid, a mold is used to position the bricks to ensure that the bricks are accurately positioned and the levelness of each layer after laying is controlled; S11: low-temperature baking is performed again to ensure that the mortar joint layer 270 between the masonry layers has a certain supporting strength, and the manufacturing of the trolley furnace platform is completed.

[0071] like Figure 8 As shown, when the trolley furnace using the above-mentioned furnace table is in use, sealing sand 800 of a specific mesh size is pre-filled in the sand sealing groove 430 of the cast body, the steel material tray 1000 is hoisted and placed on the pad layer 260, and then the steel coil 1100 to be annealed is hoisted and placed on the steel material tray 1000, the inner cover 1200 is buckled, and the trolley drive motor 1300 is started to complete the high-temperature annealing process in the furnace. Example 1

[0072] This embodiment provides a trolley furnace, and its furnace structure and preparation process are as above. Among them, the thickness of the refractory insulation layer 210 is mm, the thickness of the insulation buffer layer 220 is 40mm, the thickness of the light brick layer 230 is 240mm, the thickness of the heavy brick layer 240 is 220mm, the thickness of the support layer 250 is 400mm, the thickness of the pad layer 260 is 110mm, and the thickness of the mortar joint layer 270 is 2mm. In the preparation process, the specific temperature rise-fall curve of step S9 is as follows Fig. 9 As shown, the low temperature baking curve of step S9 is as follows Fig.10 shown. Comparative Example 1

[0073] A trolley furnace is provided, the furnace structure of which is as follows Fig.11 As shown, the furnace structure of the present invention does not include the bearing platform 100, the sealing steel ring 300, the steel ring protection module 400, the refractory insulation layer 210, the insulation buffer layer 220, and the pad layer 260. At the same time, the lightweight brick layer 230 has 3 layers, the heavy brick layer 240 has 4 layers and does not include the vertical bricks 242.

[0074] The application process of the trolley furnace in Example 1 and Comparative Example 1 was tested, and the results are shown in Table 1.

[0075] Table 1 Serial number Test content Traditional structure Furnace table of the present invention 1 Oxidation loss degree of sealing steel ring 2 months, the surface begins to gradually oxidize No oxidation 2 The foundation bricks are loose and collapsed Damage and obvious loosening after 3 months 5-6 months: Small gaps appear in the brick joints 3 Maintenance frequency 1-2 times per month Partial maintenance starts after 3 months 4 Deformation degree of tray Single production deformation 2-4mm The deformation of a single production is less than 2mm The results show that the furnace structure of the present invention can effectively solve the problems of thermal deformation of the trolley bearing steel structure, oxidation of the sealing ring and deformation and failure of the refractory material, reduce the maintenance frequency of the furnace, and increase the service life of the furnace. In Comparative Example 1, the steel coil base has a large number of masonry layers, and the brick type specifications are single. The performance of the pressure resistance and flexural strength grades is low. The design focuses on thermal insulation protection, ignoring the complex process conditions of high-temperature annealing and the influence of thermal expansion. At the same time, there is a lack of structures such as casting protection and steel ring protection, which leads to a decrease in the overall life of the furnace base and a high maintenance frequency.

[0076] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A trolley furnace platform, It is characterized in that include, A bearing platform (100) is installed on a load-bearing component (700) of the trolley furnace, and comprises a bearing frame (110) and a panel (120); The steel coil base (200) is installed on the bearing platform (100), and comprises a fire-resistant heat-insulating layer (210), a heat-insulating buffer layer (220), a light brick layer (230), a heavy brick layer (240), a supporting layer (250), and a pad layer (260) which are arranged in sequence from bottom to top; A sealing steel ring (300) vertically arranged on the outer periphery of the steel coil base (200); A steel ring protection module (400), arranged around the steel coil base (200) and covering the sealing steel ring (300), comprising a first heat-insulating bottom layer (410) and a steel ring protection casting layer (420), wherein a sand sealing groove (430) is formed between the steel ring protection casting layer (420) and the steel coil base (200); A fixed steel ring (500) arranged around the outside of the steel coil base (200); The heat insulation module (600) is arranged around the steel ring protection module (400) and covers the bearing platform (100), and comprises a second heat insulation bottom layer (610), a heat insulation casting layer (620) and a refractory brick layer (630) arranged in sequence from bottom to top.

2. The trolley furnace platform according to claim 1, It is characterized in that A plurality of positioning and mounting holes (121) are provided on the panel (120), and the positioning and mounting holes (121) are arranged in a one-to-one correspondence with the positioning pieces (710) on the load-bearing component (700).

3. The trolley furnace structure according to claim 1, It is characterized in that The cross section of the sealing steel ring (300) is corrugated.

4. The trolley furnace table according to claim 1, It is characterized in that The edge of the fire-resistant heat-insulating layer (210) protrudes upward and wraps around the edge of the heat-insulating buffer layer (220).

5. The trolley furnace platform according to claim 1, It is characterized in that The middle portion of the heavy brick layer (240) includes at least two layers of flat bricks (241), and the edge portion is a circle of vertical bricks (242), and the height of the vertical bricks (242) is consistent with the overall height of the heavy brick layer (240).

6. The trolley furnace platform according to claim 5, It is characterized in that The flat bricks (241) are arranged in a ring shape, and a circumferential expansion joint (243) is left between the flat bricks (241) in the two outermost circles and / or between the flat bricks (241) in the outermost circle and the vertical bricks (242), and the expansion joint (243) is filled with a refractory filler.

7. The trolley furnace table according to claim 1, It is characterized in that The support layer (250) comprises at least two layers of support bricks (251), and mutually matching bite structures (252) and notches (253) are provided between the support bricks (251) at different levels, and between the support bricks (251) at the bottom level and the heavy brick layer (240).

8. The trolley furnace table according to claim 1, It is characterized in that The bottom of the fixed steel ring (500) is consistent with the bottom height of the sand sealing groove (410), and the top is higher than the upper surface of the heavy brick layer (240).

9. A process for manufacturing a trolley furnace according to any one of claims 1 to 8, It is characterized in that The following steps are included: S1: installing a load-bearing platform (100) obtained by welding a load-bearing frame (110) and a panel (120) onto a load-bearing component (700) of a trolley furnace; S2: drawing a reference circle for positioning on the panel (120) of the bearing platform (100), and installing a positioning guide tube at the center of the reference circle; S3: welding the sealing steel ring (300) to the panel (120) according to the reference circle positioning; S4: positioning and installing a casting mold according to the reference circle and casting to obtain a fire-resistant heat-insulating layer (210); S5: removing the casting mold and laying a heat insulating buffer layer (220) on the surface of the fireproof heat insulating layer (210); S6: Laying down a light brick layer (230) and a heavy brick layer (240) in sequence; S7: Laying the first thermal insulation bottom layer (410) and the second thermal insulation bottom layer (610), placing the mold after the laying is completed, and pouring the steel ring protection pouring layer (420) and the thermal insulation pouring layer (620), removing the mold after the pouring is completed, and laying the refractory brick layer (630) on the thermal insulation pouring layer (620); S8: Install the fixing steel ring (500); S9: baking the completed furnace structure; S10: sequentially building a support layer (250) and a pad layer (260); S11: Baking is performed again to complete the manufacture of the trolley furnace table.

10. A trolley furnace, It is characterized in that It comprises the trolley furnace table according to any one of claims 1 to 8 or the trolley furnace table made by the manufacturing process according to claim 9.

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