CN108655385A - A kind of thin strap continuous casting cloth streaming system and its pre-heating mean - Google Patents
A kind of thin strap continuous casting cloth streaming system and its pre-heating mean Download PDFInfo
- Publication number
- CN108655385A CN108655385A CN201710203090.8A CN201710203090A CN108655385A CN 108655385 A CN108655385 A CN 108655385A CN 201710203090 A CN201710203090 A CN 201710203090A CN 108655385 A CN108655385 A CN 108655385A
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- Prior art keywords
- baking
- cover
- tundish
- baking furnace
- distributor
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 12
- 239000004744 fabric Substances 0.000 title abstract description 6
- 238000010438 heat treatment Methods 0.000 title abstract description 4
- 238000009826 distribution Methods 0.000 claims abstract description 48
- 238000009434 installation Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 238000005266 casting Methods 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000011819 refractory material Substances 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000011810 insulating material Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/60—Pouring-nozzles with heating or cooling means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Details (AREA)
Abstract
A kind of thin strap continuous casting cloth streaming system and its pre-heating mean, thin strap continuous casting cloth streaming system includes, tundish, oven toasts bell, two current distribution device sunpenders, sunpender top passes through two installation through-holes in the outer upper end face of baking two fixed block of bell, it is covered in oven by nut locking, lower part installation axle is connected with current distribution device, and tundish, current distribution device lid and current distribution device are formed flexible connected.In baking of tundish position, mouth of a river upper end is mounted on tundish bottom, lower end is inserted into current distribution device, mouth of a river lower part and current distribution device are encapsulated in oven by baking bell, symmetrically air exhausting device is set on the inside of oven, the thermal energy for toasting tundish is drawn in oven, by controlling the temperature in air draft air quantity adjusting oven.Energy consumption and equipment investment are saved in heat current distribution device when the present invention is using baking of tundish and the mouth of a river, since current distribution device after the completion of baking and tundish need not carry out assembling operation again, so reducing current distribution device heat loss.
Description
Technical Field
The invention belongs to the continuous casting technology, and particularly relates to a thin strip continuous casting flow distribution system and a preheating method thereof.
Background
The twin roll strip casting technology is a short-flow metallurgical technology, and a typical production process is shown in figure 1. The typical process of strip casting is as follows. Molten steel is injected into a distributor 4 through a water gap 6 fixed at the bottom of a tundish 5, the distributor 4 uniformly distributes the molten steel in a space surrounded by two crystallizing rollers 1a and 1b and side sealing plates 2a and 2b to form a molten pool, the crystallizing rollers 1a and 1b rotate, and meanwhile, the molten steel forms thin strip steel at the minimum gap between the crystallizing rollers 1a and 1 b.
The thin strip continuous casting flow distribution system comprises a tundish, a flow distributor and a water gap for conveying molten steel to the flow distributor. The flow distribution system uniformly distributes the molten steel on the two crystallization rollers, and the flow distributor is made of refractory materials such as aluminum carbon or quartz materials. If the temperature of the flow distributor is too low, impurities such as cold steel blocks and the like are generated on the surface of molten steel when the molten steel passes through the flow distributor, and the quality of a cast strip is affected. In order to avoid the defects, before the casting operation, the flow distribution system such as the flow distributor needs to be heated to 1000-1200 ℃, and the flow distribution system is installed at the working position in the shortest time possible, so that the relatively high temperature before the casting operation is ensured as much as possible.
At present, the problems of complex installation steps, difficult control of baking preheating uniformity and the like exist in the use of the current distributor. In addition, the heating temperature of the equipment is higher, and the heating time is longer, so the oven cover of the baking oven is easy to deform, and the heat preservation effect is influenced.
A method for installing and using a current distributor as described in chinese patent CN 102049482. The flow distributor is hung on the lower part of the tundish by using a hanging mechanism and can move along with the tundish. The pouring basket is baked with the water distributor, the baking furnace of the water distributor can independently control the baking temperature, the baking is finished, the water distributor reaches the casting position along with the pouring basket, the water distributor is placed on the water distributor support at the working position, the hanging mechanism is separated from the water distributor, and the pouring of molten steel is waited. In this patent, the cloth stream ware toasts the bell and only is used for the pouring basket to toast the position, can not remove along with the pouring basket, also can not regard as the sealed lid of sealed chamber of pouring basket when casting the position, and its hoisting machine constructs and need manual operation break away from cloth stream ware, and the operating efficiency is low.
Disclosure of Invention
The invention aims to provide a strip continuous casting flow distribution system and a preheating method thereof, which combine a flow distribution system with a baking device, do not need an independent flow distribution device baking system, and fully utilize the heat energy baked by a tundish to bake a flow distribution device; the equipment investment is reduced, and the temperature drop in the turnover process of the current distributor is reduced, so that the current distributor does not need an independent baking oven in the baking process to improve the baking efficiency and the installation efficiency of the system.
The invention is suitable for the twin-roll strip caster for casting metal casting strip with the thickness of 0.5-5mm, or relevant equipment and methods such as similar casting, smelting and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a thin strip continuous casting flow distribution system comprises a baking oven, wherein the inner bottom of the baking oven is provided with a flow distribution device bracket for supporting a flow distribution device; the baking oven is rectangular, and the lower part of the side wall of the baking oven is provided with an air outlet which is connected with an air exhaust device passing through the baking oven wall; temperature sensors are arranged on the upper part of the air outlet and in the middle of the baking furnace body and used for detecting the temperature in the furnace in the installation area; the baking furnace cover is arranged at the upper end of the flow distributor baking furnace; a central through hole is arranged in the middle of the baking furnace cover, and connecting rods connected with the bottom of the tundish are symmetrically arranged on the upper end surfaces of the baking furnace cover at the two sides of the through hole; the upper end surfaces of the outer sides of the two connecting rods of the baking furnace cover are symmetrically provided with two mounting through holes; the external dimension of the small furnace cover is matched with the central through hole in the middle of the baking furnace cover and is embedded in the central through hole, and the center of the small furnace cover is provided with a through hole through which the upper part of the water supply port passes; the flow distributor is of a box-shaped structure and is arranged on a flow distributor bracket in the flow distributor baking furnace; the lower part and/or the bottom of the flow distributor is provided with a plurality of flow distribution holes or grooves, and the outer sides of two ends of the flow distributor are provided with fixing holes or fixing grooves; the lower parts of the two flow distributor hanging rods are laterally provided with through holes, and connecting pins or shafts are arranged in the through holes and are inserted into fixing holes or fixing grooves on the outer sides of the two ends of the flow distributor; the upper parts of the two flow distributor suspension rods penetrate through two mounting through holes on the upper end surfaces of the outer sides of two connecting rods of the baking furnace cover and are locked on the upper end surface of the baking furnace cover by nuts; furthermore, the tundish, the baking furnace cover and the flow distributor form flexible connection;
preferably, four air outlets are uniformly arranged near four corners of the inner side of the baking oven; or two air outlets are arranged in the vicinity of two corners of the inner side of the baking oven in a diagonal manner.
The small furnace cover is of a split structure and is formed by combining two cover bodies, the middle of one side, opposite to each cover body, of each cover body is provided with a semicircular notch, and the edge part of the upper end of each cover body is circumferentially provided with a flange matched with the edge of a through hole in the middle of the baking furnace cover.
Preferably, the cover of the baking furnace comprises a metal cover, and heat insulation materials are arranged inside the metal cover.
Preferably, the cover of the baking furnace comprises a metal cover, and soft refractory materials are arranged on the upper surface and the lower surface of the heat insulation material in the metal cover.
Preferably, the heat insulating material is a refractory material.
Preferably, the heat insulating material includes a high heat insulating performance panel at an upper portion and a high temperature resistant ceramic fiber panel at a lower portion.
Preferably, the heat insulating material and the soft refractory material are connected to a plurality of screws fixed to the metal cover through a plurality of ceramic thread sleeves.
The baking furnace cover and the small furnace cover are of refractory structures which can ensure that the flame of the baking flow distributor can not directly contact with the metal structure of the baking furnace cover.
Furthermore, the device also comprises a swinging mechanism of the suspender of the water distributor, which is arranged corresponding to each suspender of the water distributor and comprises,
the two supports with holes are arranged on two sides of the mounting through hole on the upper end surface of the baking oven cover;
the two pin shafts are respectively arranged in the holes of the two supports with the holes in a penetrating way;
the upper surface and the lower surface of the swinging box are correspondingly provided with through holes for the upper part of the flow distributor suspender to penetrate through, and the upper part of the flow distributor suspender penetrates through the swinging box and is locked on the swinging box by a nut; the two side surfaces of the swing box are correspondingly provided with connecting holes which penetrate through the two pin shafts between the two supports with holes, and the swing box swings around the two pin shafts.
The locking device is arranged on the upper end surface of the oven cover and comprises a fixed support plate fixed on the upper end surface of the oven cover; the fixing screw penetrates through the upper part of the fixing support plate, and the head of the fixing screw compresses the swing box to limit the swing range of the swing box.
Preferably, the pin shaft is fixed on the two supports with holes through threads.
According to the preheating method of the strip continuous casting flow distribution system, the tundish, the baking furnace cover and the flow distributor are connected together and can synchronously act, wherein the flow distribution system is provided with at least two fixed operation positions; wherein,
a baking position, wherein the flow distributor and the tundish are preheated together, the flow distributor is placed in a baking furnace, a baking furnace cover is placed at the upper part of the baking furnace, and a sealing layer is formed between the soft refractory material arranged below the heat insulation material of the baking furnace cover and the baking furnace cover;
a casting position, wherein the tundish and the flow distributor are positioned above the casting rolls, and molten steel is injected into a molten pool formed by the casting rolls and the side sealing plates so as to form a casting belt below the casting rolls;
the tundish baking position is provided with a water gap upper end which is arranged at the tundish bottom, the lower end is inserted into the flow distributor, the baking furnace cover encapsulates the water gap lower part and the flow distributor in the baking furnace, the inner side of the bottom of the baking furnace is provided with an exhaust device, the heat energy baked by the tundish is absorbed into the baking furnace, and the temperature in the flow distributor hot furnace is adjusted by controlling the air exhaust amount.
The method also comprises the following steps of installing the flow distribution system:
the upper part of the water gap is arranged at the bottom of the tundish and is communicated with the tundish, a long hole in the middle of the baking furnace cover is sleeved at the bottom of the water gap, the baking furnace cover is connected with the bottom of the tundish through two symmetrically arranged connecting rods at the upper part of the baking furnace cover, and after the positions of the baking furnace cover and the tundish are fixed, a small furnace cover is arranged to seal a gap between the baking furnace cover and the water gap; the flow distributor is connected with the suspender, and the distance between the flow distributor and the lower part of the water gap is adjusted through a nut on the upper part of the suspender; thereafter, the head of the locking screw presses the swing box, thereby limiting the relative position of the lower part of the suspender and the side surface of the current distributor to be unchanged.
Preferably, the air volume of the exhaust device in the area can be independently adjusted by the air distributor preheating furnace temperature controller according to the temperature feedback of the corresponding area, so that the temperature of the area is adjusted.
The invention is distinguished and improved from the prior art:
a method for installing and using a flow distributor is disclosed in Chinese patent CN 102049482. The flow distributor is hung on the lower part of the tundish by using a hanging mechanism and can move along with the tundish. The pouring basket is baked with the water distributor, the baking furnace of the water distributor can independently control the baking temperature, the baking is finished, the water distributor reaches the casting position along with the pouring basket, the water distributor is placed on the water distributor support at the working position, the hanging mechanism is separated from the water distributor, and the pouring of molten steel is waited. In the patent, the cover of the flow distributor baking furnace is only used for the baking position of the tundish and is of a two-piece split structure, the flow distributor baking furnace cannot move along with the tundish, and the flow distributor baking furnace cover is not connected with the cover. And the locking screw is connected to one locking bracket on the upper end surface of the oven cover through threads, and the head of the locking screw presses the swing box to limit the swing range of the swing box.
The invention has the main advantages that:
1. the flow distribution cover synchronously acts with the tundish car, so that redundant steps of opening and closing the furnace cover after baking are avoided, and the operation time of equipment is saved; after baking is finished, the heat loss of the flow distributor is reduced because the flow distributor and the tundish do not need to be assembled. The method utilizes the heat generated during baking the tundish to heat the flow distributor, thereby saving energy consumption and equipment investment.
2. The baking furnace cover adopts a double-cover-plate design, so that the whole assembly and disassembly are convenient, the adjustment of the matching size between the flow distributor and the water gap is easier, and the process expansibility is improved.
Drawings
FIG. 1 is a schematic diagram of a typical twin roll strip casting process.
FIG. 2 is a schematic structural diagram of a preheating device of a flow distribution system according to the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a sectional view B-B of fig. 2.
FIG. 5 is a schematic view of a structure of a cover of a baking oven in the preheating device of the distribution system of the present invention.
FIG. 6 is a schematic view of a structure of a small furnace cover in the preheating device of the current distribution system.
Fig. 7 is a side view of fig. 6.
Fig. 8 is a cross-sectional view taken along line C-C of fig. 6.
FIG. 9 is a schematic diagram of a preheating control system of the distribution system of the present invention.
Detailed Description
Referring to fig. 2 to 9, the thin strip casting distribution system of the present invention, which includes,
a flow distributor bracket 71 for supporting the flow distributor 4 is arranged at the inner bottom of the baking oven 7; the baking oven is rectangular, and the lower part of the side wall of the baking oven is provided with an air outlet 72 which is connected with an air exhaust device 13 passing through the baking oven wall; the upper part of the air outlet 72 and the middle part of the oven body of the baking oven 7 are provided with temperature sensors 14 for detecting the temperature in the oven in the installation area;
the baking furnace cover 8 is arranged at the upper end of the stream distributor baking furnace 7; a central through hole 81 is arranged in the middle of the baking furnace cover 8, and the upper end surfaces of the baking furnace covers 8 at the two sides of the through hole 81 are symmetrically connected with connecting rods 9 and 9' at the bottom of the tundish; the upper end surfaces of the outer sides of the two connecting rods 9 and 9 'of the baking furnace cover are symmetrically provided with two mounting through holes 82 and 82';
a small furnace cover 10, the size of which is matched with the central through hole 81 in the middle of the baking furnace cover 8 and is embedded in the central through hole 81, and the center of the small furnace cover 10 is provided with a through hole 101 for the water supply port 6 to pass through;
the flow distributor 4 is of a box-shaped structure and is arranged on a flow distributor bracket 71 in the baking oven 7; the lower part and/or the bottom of the flow distributor 4 is/are provided with a plurality of flow distribution holes or grooves, and the outer sides of the two ends of the flow distributor are provided with fixing holes 41 or fixing grooves;
the lower parts of the two flow distributor hanging rods 11 and 11' are laterally provided with through holes 111 (taking the flow distributor hanging rod 11 as an example, the same applies below), and connecting pins 112 or shafts are arranged in the through holes 111 and are inserted into the fixing holes 41 or the fixing grooves at the outer sides of the two ends of the flow distributor 4; the upper parts of the two flow distributor suspension rods 11 penetrate through two mounting through holes 82 on the upper end surfaces of the outer sides of two connecting rods 9 of the baking furnace cover 8 and are locked on the upper end surface of the baking furnace cover 8 by nuts; furthermore, the tundish, the baking furnace cover and the flow distributor form flexible connection.
Further, the baking oven 7 is rectangular, and the bottom of the baking oven is provided with air outlets 72 of the air exhaust device 13 which pass through the baking oven wall to be connected with the air exhaust device, wherein the number of the air outlets 72 can be four, and the four air outlets 72 are uniformly arranged near four corners of the inner side of the bottom of the baking oven 7; or two air outlets which are diagonally arranged near two corners of the inner side of the bottom of the baking oven 7; the upper part of the air outlet 72 and the middle part of the oven body of the baking oven 7 are provided with temperature sensors 14 for detecting the temperature in the oven in the installation area.
The small oven cover 10 is a split structure and is composed of two cover bodies 102, 102', wherein the middle of one side of each cover body 102 (taking the cover body 102 as an example, the same below) is provided with a semicircular notch 1021, and the edge part of the upper end of the cover body 102 is circumferentially provided with a flange 1022 matched with the edge of the central through hole 81 in the middle of the oven cover 8.
Preferably, the cover 8 comprises a metal cover, and a heat insulating material is arranged inside the metal cover.
Preferably, the cover 8 of the baking oven comprises a metal cover, and soft refractory materials are arranged on the upper surface and the lower surface of the heat insulation material in the metal cover.
Preferably, the heat insulating material is a refractory material.
Preferably, the heat insulating material includes a high heat insulating performance panel at an upper portion and a high temperature resistant ceramic fiber panel at a lower portion.
Preferably, the heat insulating material and the soft refractory material are connected to a plurality of screws fixed to the metal cover through a plurality of ceramic thread sleeves.
The baking furnace cover and the small furnace cover are of refractory structures which can ensure that the flame of the baking flow distributor can not directly contact with the metal structure of the baking furnace cover.
Further comprises a swinging mechanism 12 of the suspender of the water distributor, which is arranged corresponding to each suspender 11 of the water distributor and comprises,
two supports 121, 121' with holes are arranged on two sides of the mounting through hole 82 on the upper end surface of the baking furnace cover 8;
two pin shafts 122, 122' are respectively arranged in the holes of the two supports 121 with holes in a penetrating way;
the upper surface and the lower surface of the swing box 123 are correspondingly provided with through holes for the upper part of the flow distributor hanging rod 11 to penetrate through, and the upper part of the flow distributor hanging rod 11 penetrates through the swing box 123 and is locked on the swing box 123 by nuts; two side surfaces of the swing box 123 are correspondingly provided with connecting holes so as to penetrate through the two pin shafts 122 and 122 ' between the two supports 121 and 121 ' with holes, and the swing box 123 swings around the two pin shafts 122 and 122 '.
The locking device 124 is arranged on the upper end surface of the baking furnace cover 8 and comprises a fixed support plate 1241 fixed on the upper end surface of the baking furnace cover 8; a fixing screw 1242 passing through the upper part of the fixing support plate 1241, the head of the fixing screw 1242 presses the swing box 123 to limit the swing range.
Preferably, the pin 122 is screwed to the two perforated supports 121.
In a typical thin strip continuous casting process, molten steel is poured into a distributor 4 through a water gap 6 fixed at the bottom of a tundish 5, the distributor 4 uniformly distributes the molten steel in a space surrounded by two crystallizing rollers 1a and 1b and side sealing plates 2a and 2b to form a molten pool, the crystallizing rollers 1a and 1b rotate, and meanwhile, the molten steel forms thin strip steel at the minimum gap between the crystallizing rollers 1a and 1b, as shown in fig. 1.
The installation steps of the flow distribution system are as follows: as shown in fig. 2 and 3, the upper part of the water gap 6 is arranged at the bottom of the tundish 5 and is communicated with the tundish 5, then the baking furnace cover 8 is connected with the bottom of the tundish 5 through the connecting rods 9 and 9', at the moment, the lower part of the water gap 6 passes through a central through hole arranged in the middle of the baking furnace cover 8, after the relative position of the baking furnace cover 8 and the tundish 5 is determined, a small furnace cover 10 is arranged to seal the gap between the baking furnace cover 8 and the water gap 6, wherein the convex part of the small furnace cover 8 is inserted into the central through hole 81, the semicircular notch 1021 faces the outer surface of the water gap 6, and the flange 1022 is attached to the edge of the central through hole 81, so that the water gap is sealed. The structure of the small furnace cover is schematically shown in figures 6-8; the distributor 4 is further connected with the two distributor suspension rods 11 and 11 ', the distance between the inside of the distributor 4 and the lower part of the water gap 6 is adjusted through nuts on the upper parts of the distributor suspension rods 11 and 11 ', the mounting positions of the distributor and the water gap are determined, and then the head parts of the fixing screws 1242 on the upper parts of the fixing support plates 1241 are used for pressing the swing boxes 123, so that the relative positions of the pin or shaft lower parts of the suspension rods 11 and 11 ' and the side surfaces of the distributor 4 are limited.
A specific example of the application of the present invention is shown in fig. 2 and 4, in which the heat insulating material is composed of multiple refractory materials, including a soft refractory material 831 in contact with metal, a soft refractory material 832 in contact with the baking oven, a high temperature resistant ceramic fiber plate 833, and a high heat insulating plate 834, and these refractory materials are fixed on the screws of the metal welding part of the baking oven cover 8 through ceramic thread sleeves 835, and tens of ceramic thread sleeves are uniformly distributed inside the oven cover. Especially, the refractory material structure of design can guarantee that the flame of toasting cloth stream ware can not directly contact with the metal structure of bell, avoids its local thermal deformation.
The following will explain the structure of the oven lid only on one side, and the fitting relationship between the hanger bar 11 and the hanger 4 and the method of attaching and detaching will be explained. In order to realize that the oven cover 8 can synchronously move along with the flow distributor 4, as shown in fig. 5, two supports 121 with holes are respectively arranged on the upper portion of the oven cover 8 corresponding to the positions of the suspenders, and correspondingly, two pin shafts 122 are fixed on the supports 121 through threads and inserted into two round holes on two sides of the swing box 123, and here, the fit clearance between the pin shafts 122 and the round holes is large, so that the swing box 123 can swing around the pin shafts 122. The tail part of the current distributor hanging rod 11 passes through the swing box 123 and is hung with the swing box 123 through a screw at the tail part, so that the upper part of the current distributor hanging rod 11 can swing left and right along with the swing box 123, and the lower part of the current distributor hanging rod can be close to or far away from the side surface of the current distributor.
The locking device 124 comprises a fixing support plate 1241 fixed on the cover 8 of the oven and a fixing screw 1242, wherein the fixing support plate 1241 is provided with a screw hole, the fixing screw 1242 is screwed on the screw hole, and the fixing screw moves back and forth to adjust the position of the swing box 123.
When the water distributor is installed, the water distributor suspender 11 swings, so that the connecting pin 112 at the lower part of the water distributor suspender is matched with the end fixing hole 41 of the water distributor, the matching size between the water distributor and the water gap is adjusted through the screw at the head part of the water distributor suspender, and after the target size is reached, the fixing screw 1242 of the locking device 124 is adopted to tightly push the swing box 123, so that the swinging of the suspender 11 is limited.
As shown in fig. 2, in the tundish baking position, the baking oven cover 8 moves down along with the tundish 5, and seals the water gap 6 and the distributor 4 in the rectangular baking oven 7, wherein the bottom of the distributor 4 contacts with the oven distributor bracket 71, the connecting pin 112 of the distributor suspension rod 11 contacts with the bottom of the fixing groove 41 of the distributor 4, and the screw at the upper part of the distributor suspension rod 11 is separated from the swing box 123.
An air outlet 72 provided at the inner side of the bottom of the oven 7 is connected to the air exhausting device 13 through the oven wall.
Two air outlets 72 (for example, one side air outlet 72, the same applies below) are symmetrically arranged at the bottom of the baking oven 7 in a diagonal line manner. The upper part of the air outlet 72 and the middle part of the oven body of the oven 7 are provided with a temperature sensor 14 for detecting the temperature in the oven in the installation area, the exhaust device 13 sucks the heat of the tundish roaster 15 into the oven 7, and the preheating oven temperature of the flow distributor is controlledThe device 16 feeds back t according to the temperature of the corresponding area2Sends out a corresponding current regulation quantity delta I2The air supply and exhaust device 13 drives the latter to change the adjustment quantity and thus the temperature of the area.
Claims (13)
1. A thin strip continuous casting flow distribution system is characterized by comprising,
the inner bottom of the baking oven is provided with a distributor bracket for supporting the distributor; the baking oven is rectangular, and the lower part of the side wall of the baking oven is provided with an air outlet which is connected with an air exhaust device passing through the baking oven wall; temperature sensors are arranged on the upper part of the air outlet and in the middle of the baking furnace body and used for detecting the temperature in the furnace in the installation area;
the baking furnace cover is arranged at the upper end of the flow distributor baking furnace; a central through hole is arranged in the middle of the baking furnace cover, and connecting rods connected with the bottom of the tundish are symmetrically arranged on the upper end surfaces of the baking furnace cover at the two sides of the through hole; the upper end surfaces of the outer sides of the two connecting rods of the baking furnace cover are symmetrically provided with two mounting through holes;
the external dimension of the small furnace cover is matched with the central through hole in the middle of the baking furnace cover and is embedded in the central through hole, and the center of the small furnace cover is provided with a through hole through which the upper part of the water supply port passes;
the flow distributor is of a box-shaped structure and is arranged on a flow distributor bracket in the flow distributor baking furnace; the lower part and/or the bottom of the flow distributor is provided with a plurality of flow distribution holes or grooves, and the outer sides of two ends of the flow distributor are provided with fixing holes or fixing grooves;
the lower parts of the two flow distributor hanging rods are laterally provided with through holes, and connecting pins or shafts are arranged in the through holes and are inserted into fixing holes or fixing grooves on the outer sides of the two ends of the flow distributor; the upper parts of the two flow distributor suspension rods penetrate through two mounting through holes on the upper end surfaces of the outer sides of two connecting rods of the baking furnace cover and are locked on the upper end surface of the baking furnace cover by nuts; furthermore, the tundish, the baking furnace cover and the flow distributor form flexible connection.
2. The thin strip casting flow distribution system as claimed in claim 1, wherein the four air outlets are uniformly arranged near four corners of the inside of the baking oven; or two air outlets are arranged in the vicinity of two corners of the inner side of the baking oven in a diagonal manner.
3. The strip casting and flow distributing system according to claim 1, wherein the small cover is a split structure formed by combining two covers, each cover has a semicircular notch in the middle of the opposite side, and a flange is provided on the upper end of the cover in the circumferential direction to fit the edge of the through hole in the middle of the baking cover.
4. The thin strip casting distribution system of claim 1, wherein the bake-out oven lid comprises a metal hood, an inner insulation material.
5. The strip casting flow distribution system of claim 4, wherein the cover comprises a metal cover with flexible refractory material disposed on the top and bottom surfaces of the insulation material.
6. The preheating device for the strip casting distribution system according to claim 4 or 5, wherein the heat insulating material is a refractory material.
7. The thin strip casting distribution system according to claim 4 or 5, wherein the heat insulating material includes a high heat insulating property panel at an upper portion and a high temperature resistant ceramic fiber panel at a lower portion.
8. The preheating device for the strip casting distribution system according to claim 4, wherein the heat insulating material and the soft refractory material are connected to screws fixed to the metal cover by means of ceramic screws.
9. The strip casting flow distribution system of claim 1, wherein the small furnace lid is a refractory structure that ensures that the flame of the baked flow distributor does not directly contact the metal structure of the furnace lid.
10. The thin strip casting distribution system of any one of claims 1 to 10, further comprising a distributor boom swing mechanism provided corresponding to each distributor boom, comprising,
the two supports with holes are arranged on two sides of the mounting through hole on the upper end surface of the baking oven cover;
the two pin shafts are respectively arranged in the holes of the two supports with the holes in a penetrating way;
the upper surface and the lower surface of the swinging box are correspondingly provided with through holes for the upper part of the flow distributor suspender to penetrate through, and the upper part of the flow distributor suspender penetrates through the swinging box and is locked on the swinging box by a nut; the two side surfaces of the swing box are correspondingly provided with connecting holes which penetrate through the two pin shafts between the two supports with holes, and the swing box swings around the two pin shafts.
The locking device is arranged on the upper end surface of the oven cover and comprises a fixed support plate fixed on the upper end surface of the oven cover; the fixing screw penetrates through the upper part of the fixing support plate, and the head of the fixing screw presses the swing box to limit the swing range of the swing box.
11. The thin strip casting flow distribution system as claimed in claim 10, wherein the pin is threadedly secured to the two perforated supports.
12. The method for preheating the strip casting distribution system according to any one of claims 1 to 11, wherein the tundish, the cover of the baking furnace, and the distributor are coupled together to be capable of synchronous operation, wherein the distribution system has at least two fixed operating positions; wherein,
a baking position, wherein the flow distributor and the tundish are preheated together, the flow distributor is placed in a baking furnace, a baking furnace cover is placed at the upper part of the baking furnace, and a sealing layer is formed between the soft refractory material arranged below the heat insulation material of the baking furnace cover and the baking furnace cover;
a casting position, wherein the tundish and the flow distributor are positioned above the casting rolls, and molten steel is injected into a molten pool formed by the casting rolls and the side sealing plates so as to form a casting belt below the casting rolls;
at the baking position of the tundish, the upper end of a water gap is arranged at the bottom of the tundish, the lower end of the water gap is inserted into a flow distributor, the lower part of the water gap and the flow distributor are packaged in a baking furnace through a baking furnace cover, an exhaust device is arranged on the inner side of the bottom of the baking furnace, the heat energy baked by the tundish is absorbed into the baking furnace, and the temperature in a heat furnace with the flow distributor is adjusted by controlling the exhaust air volume;
the method also comprises the following steps of installing the flow distribution system:
the upper part of the water gap is arranged at the bottom of the tundish and is communicated with the tundish, a long hole in the middle of the baking furnace cover is sleeved at the bottom of the water gap, the baking furnace cover is connected with the bottom of the tundish through two symmetrically arranged connecting rods at the upper part of the baking furnace cover, and after the positions of the baking furnace cover and the tundish are fixed, a gap between the baking furnace cover and the water gap is sealed by adopting a small furnace cover; the flow distributor is connected with the suspender, and the distance between the flow distributor and the lower part of the water gap is adjusted through a nut on the upper part of the suspender; thereafter, the head of the locking screw presses the swing case, thereby restricting the relative position of the lower portion of the hanger bar and the side of the current distributor.
13. The method of claim 12, wherein the furnace temperature controller is capable of independently adjusting the air volume of the exhaust device of the zone according to the temperature feedback of the zone, thereby adjusting the temperature of the zone.
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| CN201710203090.8A CN108655385B (en) | 2017-03-30 | 2017-03-30 | Thin strip continuous casting flow distribution system and preheating method thereof |
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| CN201710203090.8A CN108655385B (en) | 2017-03-30 | 2017-03-30 | Thin strip continuous casting flow distribution system and preheating method thereof |
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