CN110153385B - Slag adding device - Google Patents
Slag adding device Download PDFInfo
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- CN110153385B CN110153385B CN201910455131.1A CN201910455131A CN110153385B CN 110153385 B CN110153385 B CN 110153385B CN 201910455131 A CN201910455131 A CN 201910455131A CN 110153385 B CN110153385 B CN 110153385B
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- conveying hopper
- slag
- material conveying
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- storage tank
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- 239000002893 slag Substances 0.000 title claims abstract description 82
- 239000000463 material Substances 0.000 claims abstract description 104
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000002425 crystallisation Methods 0.000 claims abstract description 28
- 230000008025 crystallization Effects 0.000 claims abstract description 28
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 15
- 239000010959 steel Substances 0.000 abstract description 15
- 239000002436 steel type Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000009749 continuous casting Methods 0.000 description 16
- 230000004907 flux Effects 0.000 description 13
- 238000005266 casting Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/108—Feeding additives, powders, or the like
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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/165—Controlling or regulating processes or operations for the supply of casting powder
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of steel smelting, and discloses a slag adding device which comprises a storage tank, a bearing vehicle and a conveying hopper, wherein an outlet of the storage tank is arranged above the head end of the conveying hopper correspondingly, a filter screen is arranged in the middle of the storage tank, slag falls onto the conveying hopper through the outlet of the storage tank, the head end of the conveying hopper is rotatably connected with the bearing vehicle through a rotating screw rod, the tail end of the conveying hopper inclines downwards relative to the head end, the inclined angle is adjustable, and a vibrating crystallization platform drives the tail end of the conveying hopper to swing up and down, so that the slag uniformly falls into a crystallizer in the center of the vibrating crystallization platform. The slag adding device provided by the invention does not depend on extra media or consume other energy, and the inclination and the vibration amplitude of the material conveying hopper are adjusted through the height of the nut, so that the adjustment of the feeding rate of the covering slag is realized, the requirements of different steel types and different pulling speeds are met, and the device has the advantages of simple structure, small occupied space, convenience in operation and wide application range.
Description
Technical Field
The invention relates to the technical field of steel smelting processes, in particular to a continuous casting mold flux slag adding device.
Background
As is well known, a crystallizer is used as a heart of continuous casting, molten steel is cooled by the crystallizer to form a primary blank shell, the blank shell is separated by the up-and-down reciprocating motion of the crystallizer, and in the process, protective slag is required to be continuously added to the surface of the molten steel in the crystallizer, and the added protective slag can control the lubrication and heat transfer between the blank shell and the crystallizer while playing roles in preserving heat, isolating air, preventing the molten steel from being secondarily oxidized and absorbing impurities, so that the continuous casting process can be smoothly carried out. Therefore, the development of the application technology of the casting powder is of great significance to continuous casting.
Because the continuous casting process in China is complex, the field equipment is compact to install, the space is relatively narrow, and the automatic casting powder adding technology is slow to develop. In the actual production process, most enterprises adopt a manual slag adding mode, but the operation mode is relatively large in randomness, so that the instantaneous stirring of the liquid level of the crystallizer steel is easily caused, the thickness of a slag layer in the vibrating crystallizer is not uniform, and the quality of a casting blank is influenced due to the problems of slag entrapment, cracks and the like. In addition, a series of factors harmful to human health, such as heat radiation of high-temperature molten steel, nuclear radiation of Co radioactive elements, volatile fluorine in mold flux, and the like, exist in the continuous casting process. In order to improve the quality of the continuous casting billet and the labor condition of workers, different automatic crystallizer casting powder adding technologies are gradually developed in recent years. However, the popularity of slag adding equipment is low, most enterprises still adopt a manual slag adding mode, only a few steel mills adopt imported automatic slag adding machines, the price is high, extra media and energy are consumed, the water gap cannot be completely covered, and manual slag supplement is needed.
Specifically, the slag adding device in the prior art can be divided into three types according to the power source of the feeding mode, including gravity conveying, screw conveying and pneumatic conveying.
The gravity feed is to feed the mold flux into the mold by gravity. As early as 1992, the method is applied to round billet continuous casting machines in foreign HKM factories, but slag is frequently blocked, and the effect is not ideal. And it is required at the time of design that (1) should have a sufficient height so that the mold flux can flow into the continuous casting mold. (2) A large mold flux hopper should be provided. (3) And a rigid conveying pipeline is adopted to keep a necessary distribution angle and ensure the flowability of the casting powder in the conveying pipeline. Although the gravity type slag adding device has a simple structure, the gravity type slag adding device has a plurality of problems in design, such as that the continuous casting station has no sufficient vertical space to meet the requirement of a flowing angle of the casting powder, and the automatic slag adding device cannot be arranged at a position close to the crystallizer. The mold flux storage bin is generally charged by a worker or a crane, and when the casting steel grade is changed, the storage bin mold flux needs to be changed again so as to match the cast steel grade, and the equipment design and the operation procedure are relatively complicated.
In the screw conveying, the motor drives a bearing which drives a screw blade to move, and the casting powder is conveyed into the crystallizer (represented by Wuhan university of science and technology patent ZL201510561924.3 as a typical representative). The device can realize multi-point material distribution only by being provided with a plurality of movable feeding pipes, and the protection slag of the crystallizer is uniformly distributed in the crystallizer although the feeding rate is accurately controlled. However, due to the length of the screw conveying mechanism, the slag adding device is required to be arranged near the crystallizer. The main problems of such devices are complex structure, large floor space and relatively difficult operation. When the steel grade and the drawing speed are changed, the casting powder cannot be adjusted quantitatively. The running and debugging are very complicated and the operation is inconvenient in the using process. In addition, in the feeding process, the movement of the feeding pipe is not beneficial to manual slag salvaging, and electric power is needed to provide a power source.
In the case of a pneumatic conveying slag adding machine, the mold flux is fed into a crystallizer (represented by the company ZL201310322394.8, baoshan steel products ltd, as a representative) through a fluidized bed by using gas (nitrogen or argon) as a carrier fluid. The device also needs to be provided with a plurality of movable feeding pipes for feeding, and naturally, the spiral conveying feeding characteristic also exists. However, in recent years, granulated mold flux has been used in order to improve the working environment and reduce the use of powdery mold flux. The granular covering slag has higher void ratio than the powdery covering slag, so that gaps among the covering slag particles are enlarged, a fluidized layer is difficult to form, the amount of the covering slag added into the crystallizer is difficult to control, and the pneumatic slag adding device bin and the pipeline system have complex structures, higher manufacturing cost and complicated maintenance work. Although the device has better characteristics than the former two, the slag adding amount of the casting powder can only meet the production requirements of single pulling speed and single steel grade, the adjustment is difficult at any time, and the power source of the device needs both electric power and pneumatic power.
Therefore, the existing technologies have respective defects, and the site arrangement of the continuous casting machines of the steel enterprises is greatly different. Therefore, it is desired to develop a new mold flux slag adding apparatus to improve the quality of a casting slab and reduce the labor intensity of workers, while making full use of the fluidization property of the mold flux itself and combining the actual situation of a continuous casting site, by making use of the characteristics of the existing slag adding technology.
Disclosure of Invention
The invention aims to provide a slag adding device, and aims to solve the problems that in the prior art, the slag adding speed of a continuous casting mold slag adding device is not uniform, the corresponding feeding speed cannot be changed according to the type of molten steel, and an additional power source needs to be provided.
The embodiment of the invention provides a slag adding device, which comprises: storage tank, bear car and defeated hopper, the export of storage tank corresponds the top setting of the head end of defeated hopper, storage tank middle part is equipped with the filter screen, and the material sediment passes through the export of storage tank drops extremely on the defeated hopper, the head end of defeated hopper with bear the car and pass through rotatory screw rod rotatable coupling, the relative head end downward sloping of tail end of defeated hopper, and the angle of slope is adjustable, the tail end of defeated hopper passes through coupling assembling and links to each other with vibration crystallization platform, vibration crystallization platform drive the tail end luffing motion of defeated hopper makes the material sediment drop in the crystallizer at vibration crystallization platform center uniformly.
Further, coupling assembling includes the rigidity member, rigidity member upper end with the tail end fixed connection of defeated hopper, the lower extreme and the vibration crystallization platform butt of rigidity member.
Furthermore, the material conveying hopper is further provided with an upper cover covering the tail end of the material conveying hopper, the upper cover and the bottom wall of the material conveying hopper are respectively provided with an upper connecting hole and a lower connecting hole, and the connecting assembly is simultaneously connected with the upper connecting hole and the lower connecting hole.
Further, coupling assembling includes connecting screw and cover and locates connecting screw threaded first nut and second nut, connecting screw's upper end is from upwards passing down in proper order the connecting hole down go up the connecting hole, first nut corresponds go up the connecting hole setting, the second nut corresponds the connecting hole setting down, defeated material fill tail end is located first nut with between the second nut, connecting screw's lower extreme with crystallization vibration platform butt.
Further, last cover of connecting screw is equipped with cushion collar and lower cushion collar, go up the outer wall of cushion collar with the pore wall contact of last connecting hole, down the outer wall of cushion collar with the pore wall contact of lower connecting hole, still the cover is equipped with the elastic component on the connecting screw, the one end of elastic component with first nut butt, the other end of elastic component with go up the cushion collar butt.
Furthermore, a positioning sleeve is arranged on the vibration crystallization platform, and the lower end of the connecting screw rod is inserted into the positioning sleeve.
Furthermore, a material control plate is arranged on the material conveying hopper, the material control plate is clamped between two opposite side walls of the material conveying hopper, and an opening is formed between the bottom of the material control plate and the bottom wall of the material conveying hopper.
Furthermore, a diversion trench is arranged on the bottom wall of the material conveying plate and comprises a plurality of diversion strips which are arranged on the bottom wall in parallel at intervals, and the extension direction of the diversion strips is consistent with the moving direction of the material slag.
Furthermore, the diversion trench comprises a front diversion trench and a rear diversion trench, and the number of the diversion strips in the rear diversion trench is 2 times or more than 2 times that of the diversion strips in the front diversion trench.
Furthermore, the export that corresponds the storage tank on the defeated hopper is provided with the guide plate, the one end of guide plate with the diapire laminating of defeated hopper, the guide plate with contained angle between the defeated hopper is the obtuse angle, the other end of guide plate is close to the export setting of storage tank, just the export of storage tank is in the projection on the defeated hopper bottom wall is located the guide plate is in within the projection on the defeated hopper bottom wall.
Based on the technical scheme, compared with the prior art, the slag adding device provided by the invention utilizes the gravity of the covering slag particles and the fluidization property of the covering slag particles to perform blanking flow guide, and simultaneously utilizes the vertical vibration of the crystallizer to provide driving force, so that the whole process does not depend on additional media and consumes other energy. Because the tail part of the material conveying hopper is connected with the bearing trolley through the rotating screw rod, the inclination and the vibration amplitude of the material conveying hopper are adjusted by adjusting the heights of the first nut and the second nut, so that the feeding speed of the covering slag can be adjusted, and the requirements of different steel types and different pulling speeds are met. The device has the advantages of simple structure, small occupied space, convenient operation and wide application range, and has important significance for improving the quality of the continuous casting billet and protecting the health of workers.
Drawings
FIG. 1 is a schematic view of the structure of a slag adding apparatus according to the first embodiment of the present invention
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, it should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting. The following describes the implementation of the present invention in detail with reference to specific embodiments.
Example one
As shown in fig. 1, the slag adding apparatus of the present invention comprises: a carrier vehicle 5 and a delivery hopper 11. The bearing vehicle 5 is rotatably connected with the material conveying hopper 11 through a rotating screw 6, and the material conveying hopper 11 can move around the rotating screw 6. The material conveying hopper 11 comprises a head end and a tail end, and the head end is connected with the carrying vehicle 5. The tail end of the material conveying hopper 11 is connected with the vibration crystallization platform 18 through a connecting component, and receives the vibration effect of the vibration crystallization platform 18 to drive the tail end of the material conveying hopper 11 to do up-and-down swinging motion. The material-conveying hopper 11 is configured as a strip-shaped trough having a bottom wall and two opposite side walls.
The bottom of the carrier vehicle 5 is provided with universal wheels 22 for moving the carrier vehicle 5. The universal wheel 22 is also provided with a brake 23, and the position of the bearing vehicle 3 can be fixed by stepping down the brake 23 to keep the stability of the slag adding device.
The storage tank 1 is used for storing the material slag, and the lower part of the storage tank 1 is provided with an opening. When feeding, the storage tank 1 is placed above the head end of the material conveying hopper 11, the opening of the storage tank 1 is aligned with the head end, and the material slag can fall into the material conveying hopper 11 completely. The middle part of the storage tank 1 is provided with a filter screen 2 for preventing large-size particles or foreign matters from falling into and blocking a discharge opening. The grid of the filter screen 2 is square, and the side length of the square is less than 1 cm. The lower part of the storage tank 1 is a conical part which gradually shrinks from the middle part to the opening. The opening at the upper part of the material storage tank 1 is large, so that the material slag can be poured conveniently. The lower part of the storage tank 1 is a small opening, so that the material slag can be poured to a designated position conveniently.
The head end of the material conveying hopper 11 is also provided with a guide plate 4, and the guide plate 4 is arranged at the outlet of the material conveying hopper 11 corresponding to the material storage tank 1. The guide plate 4 is used for buffering the materials and enabling the materials to fall uniformly. One end of the guide plate 4 is attached to the bottom wall of the material conveying hopper 11, and the included angle between the guide plate 4 and the material conveying hopper 11 is an obtuse angle. The other end of the guide plate 4 inclines upwards and is close to the outlet of the storage tank 1, and the projection of the outlet of the storage tank 1 on the bottom wall of the material conveying hopper 11 is located in the projection of the guide plate 4 on the bottom wall of the material conveying hopper 11, so that the materials flowing out of the storage tank 1 are ensured to fall along the guide plate 4. The guide plate 4 is configured into a circular arc shape, as shown in fig. 1, the circular arc guide plate can make the descending of the material more stable.
Two side edges of the guide plate 4 extend to two side walls of the conveying hopper 11 respectively and are connected with the side walls. The material conveying hopper 11 is provided with a material control plate 7 near the end. The material control plate 7 is clamped between two opposite side walls of the material conveying hopper 11. And an opening is arranged between the bottom of the material control plate 7 and the bottom wall of the material conveying hopper 11, and materials can pass through the opening. Preferably, the bottom opening of the material control plate 7 is arranged in a zigzag shape. The space and height of the saw teeth are correspondingly adjusted according to the shape and the blanking speed of the material, so that the uniformity of the material entering the material guide chute is ensured. In this embodiment, the pitch of the serrations is 1cm, and the height of the serrations is 2 cm.
The bottom wall of the material conveying hopper 11 is also provided with a diversion trench. The diversion trench is formed by arranging a plurality of strip-shaped diversion strips in parallel at intervals, and the diversion trench formed between the diversion strips is used for feeding slag to pass through. The guide grooves comprise a front guide groove 8 and a rear guide groove 9. The number of the guide strips in the rear guide groove 9 is 2 times or more than that of the guide strips in the front guide groove 8, so that the covering slag 16 falling into the crystallizer 17 is relatively more uniform. In this embodiment, the height of preceding water conservancy diversion frid is 4cm, and the height of back water conservancy diversion frid is 3cm, all is higher than the height of 7 sawtooth of accuse flitch, and the guiding gutter can play the effect of even material. The number of the guide strips of the front guide groove 8 is 8, the number of the guide strips of the rear guide groove 9 is 16, and the number of the rear guide strips is 2 times of that of the front guide strips, so that the uniformity of the fed materials is further ensured.
In one embodiment, the tail end of the hopper 11 is provided with a connecting assembly, which includes a rigid rod, the upper end of the rigid rod is fixedly connected with the tail end of the hopper, and the lower end of the rigid rod is abutted with the vibration crystallization platform. When the vibration crystallization platform vibrates, the rigid rod piece can transmit the vibration to the material conveying hopper 11 to drive the tail end of the material conveying hopper 11 to swing up and down.
In this embodiment, the tail end of the material conveying hopper 11 is covered with an upper cover, and the upper cover is fixedly connected with the side wall of the material conveying hopper 11 to prevent the slag from spilling. The upper cover and the 11 diapire of defeated hopper are equipped with connecting hole and lower connecting hole respectively, and coupling assembling connects connecting hole and lower connecting hole simultaneously. An upper buffer sleeve 3 and a lower buffer sleeve 19 are respectively arranged in the upper connecting hole and the lower connecting hole. The outer wall of the upper cushion collar 3 is in contact with the upper connecting hole, and the outer wall of the lower cushion collar 19 is in contact with the lower connecting hole. The upper buffer sleeve 3 and the lower buffer sleeve 19 are used for supporting the connecting assembly, and the friction and the collision between the connecting assembly and the material conveying hopper are buffered.
In the present embodiment, the connecting assembly comprises a connecting screw 13, a first nut 12 and a second nut 10. The first nut 12 and the second nut 10 are sleeved on the connecting screw rod 13 and are in threaded connection with the connecting screw rod 13. The connecting screw 13 passes through both the upper and lower connecting holes. An upper buffer sleeve 3 is arranged between the connecting screw rod 13 and the upper connecting hole, and a lower buffer sleeve 19 is arranged between the connecting screw rod 13 and the lower connecting hole. The first nut 12 is adjacent to the upper attachment hole and the second nut 10 is adjacent to the lower attachment hole. The tail end of the material conveying hopper 11 is positioned between the first nut 12 and the second nut 10. The outer diameters of the first nut 12 and the second nut 10 are larger than the diameters of the upper connecting hole and the lower connecting hole, so that when the tail end of the material conveying hopper 11 swings up and down, the swing range of the tail end is limited between the first nut 12 and the second nut 10. That is, the top cover of the tail end of the hopper 11 can be raised to abut against the first nut 12, and the bottom wall of the tail end of the hopper 11 can be lowered to abut against the second nut 10.
The first nut 12 and the second nut 10 are in threaded connection with the connecting screw 13, so that their position on the connecting screw 13 can be adjusted by rotating the first nut 12 and the second nut 13. The head end of the material conveying hopper 11 is rotatably connected with the bearing vehicle, when the second nut 10 rotates downwards, the lowest position of the bottom wall of the tail end descends, and the angle of downward inclination of the tail end of the material conveying hopper 11 is increased; when the second nut 10 is rotated upward, the lowest position of the bottom wall of the tail end is raised, and the downward inclination angle of the tail end of the material conveying hopper 11 is reduced. The mold flux particles having fluidization characteristics in the hopper 11 move from the head end to the tail end of the hopper 11 under the action of gravity. Therefore, the descending speed of the slag can be adjusted by changing the inclination angle of the tail end by adjusting the position of the second nut 10.
While the first nut 12 is used to define the highest movement position of the hopper 11, with the position of the second nut 10 fixed: when the first nut 12 rotates upwards, the highest position of the tail end upper cover rises, and at the moment, the amplitude of the tail end swing of the material conveying hopper 11 is increased and the frequency is reduced; when the first nut 12 rotates downwards, the highest position of the tail end upper cover descends, and at the moment, the amplitude of the tail end swing of the material conveying hopper 11 is reduced, and the frequency is increased. The vibration frequency and the vibration amplitude of the tail end are changed by adjusting the position of the first nut 12, so that the device is suitable for the movement of different types of material slag.
As shown in fig. 1, the connection screw 13 is further sleeved with an elastic member 14, the elastic member 14 is disposed between the upper connection hole and the first nut 12, and two ends of the elastic member 14 respectively abut against the upper connection hole and the first nut 12. The elastic member 14 is used for buffering the impact when the tail end swings up and down. On the other hand, the elastic member 14 itself has a certain length, and the swing amplitude of the tail end of the material conveying hopper 11 can be changed by replacing the elastic member 14, so that the vibration frequency and the vibration amplitude of the tail end are changed, and the material conveying hopper is suitable for the movement of different types of slag.
The vibrating crystallization platform 18 is further provided with a fixed sleeve 20. The lower end of the connecting screw 13 abuts against the crystal oscillating table 18. The fixed sleeve 20 is connected to the vibrating crystallization platform 18 by pins 21. When vibration occurs, the connecting screw 13 moves in the fixed sleeve 20, so that the position of the connecting screw 13 is prevented from being changed, and the stability of the slag adding device is ensured.
The material conveying hopper 11 is connected with the bearing vehicle through a rotary screw 6, the material conveying hopper 11 can be replaced, the width of the tail end of the material conveying hopper 11 is matched with the width of a crystallizer 17 at the center of the vibration crystallization platform, and the falling protective slag 15 can cover the whole crystallizer. In this embodiment, the width of the outlet at the tail end of the material conveying hopper is 1200 mm.
The specific steps of using the slag adding device of the invention to add the slag into the casting powder are as follows:
s1, firstly, pushing the carrier vehicle 5 to move the slag adding device to the position near the vibration crystallization platform 18, aligning the tail end of the material conveying hopper 11 with the crystallizer 17 at the center of the vibration crystallization platform 18, then stopping moving, fixing the carrier vehicle 5 through the brake 23, placing the connecting piece at the tail end of the material conveying hopper 11 on the vibration crystallization platform, and enabling the lower end of the connecting piece to abut against the vibration crystallization platform 18;
s2, adjusting the first nut 12 on the connecting screw rod 13, changing the inclination of the tail end of the conveying hopper 11 relative to the head end of the conveying hopper, adjusting the second nut 10, and changing the distance between the first nut 12 and the second nut 10 to adjust the amplitude and the vibration frequency of the tail end of the conveying hopper, so that the falling of the material slag 15 reaches the corresponding speed;
s3, aligning the opening of the storage tank 1 to the head end of the conveying hopper 11, enabling the slag 15 to fall into the conveying hopper, starting the crystallization vibration platform 18 to vibrate, driving the connecting piece to move up and down to drive the tail end of the conveying hopper 11 to swing up and down, enabling the slag to gradually move from the head end of the conveying hopper to the tail end of the conveying hopper, homogenizing the slag through the material control plate 7 and the diversion trench, and finally falling into the crystallizer 17 of the crystallization vibration platform 18 from the tail end and uniformly covering the surface of molten steel to finish slag adding.
In conclusion, the slag adding device for the continuous casting covering slag has the following beneficial effects:
(1) the material conveying hopper is driven to vibrate by utilizing the power of the vibration crystallization platform, and the material slag is added into the crystallizer by combining the gravitational potential energy generated by the inclination of the material conveying hopper, so that additional medium and power are not needed, the labor production process is simplified, and meanwhile, the cost and the energy consumption are reduced.
(2) The inclination angle, the vibration amplitude and the frequency of the material conveying hopper can be adjusted by adjusting the nut on the connecting screw rod, so that the requirements of different steel types and different pulling speeds can be met by adjusting the feeding speed of the covering slag.
(3) Through setting up accuse flitch and guiding gutter for the material sediment flows evenly, realizes automatic continuous even reinforced, reduces manual operation and realizes adding the automation of sediment.
(4) The device has simple structure and small occupied area, and can not influence manual slag salvaging. Meanwhile, the operation is convenient, the cost is low and the maintenance is easy.
(5) The application range is wide. No matter what kind of crystallizer, such as slab, square billet, or round billet, only needs to design proper device size, can satisfy the requirement of continuous casting.
The above-mentioned embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications, substitutions and improvements within the technical scope of the present invention, and these modifications, substitutions and improvements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A slag adding device is characterized by comprising: the material conveying device comprises a storage tank, a loading vehicle and a material conveying hopper, wherein the outlet of the storage tank is arranged above the head end of the material conveying hopper correspondingly, a filter screen is arranged in the middle of the storage tank, material slag falls onto the material conveying hopper through the outlet of the storage tank, the head end of the material conveying hopper and the loading vehicle are rotatably connected through a rotating screw, the tail end of the material conveying hopper inclines downwards relative to the head end, the inclined angle is adjustable, the tail end of the material conveying hopper is connected with a vibration crystallization platform through a connecting assembly, the vibration crystallization platform drives the tail end of the material conveying hopper to swing up and down, so that the material slag uniformly falls into a crystallizer at the center of the vibration crystallization platform, an upper cover covering the tail end of the material conveying hopper is further arranged on the material conveying hopper, an upper connecting hole and a lower connecting hole are respectively formed in the bottom walls of the upper cover and the material conveying hopper, and the connecting assembly is simultaneously connected with the upper connecting hole and the lower connecting hole, coupling assembling is located including connecting screw and cover connecting screw threaded first nut and second nut, connecting screw's upper end is from upwards passing down in proper order the connecting hole down go up the connecting hole, first nut corresponds go up the connecting hole setting, the second nut corresponds the connecting hole setting down, defeated material fill tail end is located first nut with between the second nut, connecting screw's lower extreme with crystallization vibration platform butt, first nut with the second nut with connecting screw is threaded connection, through the rotation first nut with the second nut adjusts them and is in connecting screw is last position.
2. The slag adding device as claimed in claim 1, wherein the connecting assembly comprises a rigid rod member, the upper end of the rigid rod member is fixedly connected with the tail end of the material conveying hopper, and the lower end of the rigid rod member is abutted with the vibration crystallization platform.
3. The slag adding device as claimed in claim 1, wherein the connecting screw is sleeved with an upper buffer sleeve and a lower buffer sleeve, the outer wall of the upper buffer sleeve is in contact with the hole wall of the upper connecting hole, the outer wall of the lower buffer sleeve is in contact with the hole wall of the lower connecting hole, the connecting screw is further sleeved with an elastic member, one end of the elastic member is abutted to the first nut, and the other end of the elastic member is abutted to the upper buffer sleeve.
4. The slag adding device as claimed in claim 1, wherein a positioning sleeve is provided on the vibration crystallization platform, and a lower end of the connecting screw is inserted into the positioning sleeve.
5. The slag adding device as claimed in any one of claims 1 to 4, wherein a material control plate is arranged on the material conveying hopper, the material control plate is clamped between two opposite side walls of the material conveying hopper, and an opening is arranged between the bottom of the material control plate and the bottom wall of the material conveying hopper.
6. The slag adding device according to any one of claims 1 to 4, wherein a guide groove is formed in a bottom wall of the conveying hopper, the guide groove comprises a plurality of guide strips arranged on the bottom wall in parallel at intervals, and the extension direction of the guide strips is consistent with the moving direction of the slag.
7. The slag adding device as claimed in claim 6, wherein the guide grooves comprise a front guide groove and a rear guide groove, and the number of the guide strips in the rear guide groove is more than 2 times that in the front guide groove.
8. The slag adding device as claimed in any one of claims 1 to 4, wherein a guide plate is provided on the conveying hopper corresponding to the outlet of the storage tank, one end of the guide plate is attached to the bottom wall of the conveying hopper, the included angle between the guide plate and the conveying hopper is an obtuse angle, the other end of the guide plate is provided close to the outlet of the storage tank, and the projection of the outlet of the storage tank on the bottom wall of the conveying hopper is located within the projection of the guide plate on the bottom wall of the conveying hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455131.1A CN110153385B (en) | 2019-05-29 | 2019-05-29 | Slag adding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455131.1A CN110153385B (en) | 2019-05-29 | 2019-05-29 | Slag adding device |
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| CN110153385A CN110153385A (en) | 2019-08-23 |
| CN110153385B true CN110153385B (en) | 2021-09-14 |
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| CN201910455131.1A Active CN110153385B (en) | 2019-05-29 | 2019-05-29 | Slag adding device |
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