JPH1094963A - Collection method and device of ground discharged thing of slab surface imperfections removal facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect a ground dischaged thing generated in a slab surface imperfections removal facility efficiently and reutilize effectively. SOLUTION: Ground chips by grinding the surface of a slab 21 by a rotary grinding wheel 23 cooled in a jacket 35 and dropped onto a vibration conveyer 27. An air around the rotary grinding wheel 23 is filtered by a dust collector 31 and dust shape ground powder are collected. Collected ground powder are dropped on the vibration conveyer 27 and mixed with ground chips 24. As the surface of the vibration conveyer 27 is made by a steel plate, there is no fear to burn, even if the ground chips 24 with a high temperature are accumulated. As the direct water cooling of the ground chips 24 is not required, a grinding powder excluding a water and easy to re-utilize can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel chip flaw removing equipment for recovering grinding discharges such as grinding dust generated when the surface of a steel piece such as stainless steel is ground and flawed. The present invention relates to a method and an apparatus for collecting grinding waste.

[0002]

2. Description of the Related Art Conventionally, surface grinding using a rotary grindstone has been performed as a flaw removing step for removing surface defects from a steel piece such as a slab or a billet as a rolling material.
FIG. 20 shows a configuration of a typical flaw removal facility. Defects such as flaws on the surface of the slab 1 are removed by grinding with the rotating grindstone 3 of the grinder 2. At the time of grinding, grinding dust 4 such as cutting chips is generated. The grinder 2 grinds the slab 1 with the rotating grindstone 3 while moving on the rail 5.
A belt conveyor 6 is provided along the rail 5, and grind dust 4 generated when the grinder 2 moves while grinding the surface of the slab 1 is deposited on the surface and transported. On the downstream side in the conveying direction of the belt conveyor 6, a bag 7 for grinding dust is provided.
Waits and collects the grinding dust 4.

Although the slab 1 is scratched above the floor of the factory, the standby position of the belt conveyor 6 and the bag 7 for grinding dust is below the floor of the factory. The grinding waste 4 collected in the grinding waste bag 7 is reused as scrap iron or the like. Since the collection vehicle 8 that conveys the grinding dust 4 collected for the reuse of the grinding dust 7 generally moves on the floor of the factory, the grinding dust bag 7 below the floor is lifted by the crane 9, It is necessary to transfer to the collection vehicle 8.

Further, when grinding the slab 1, dust-like grinding powder is generated, which deteriorates the working environment. Therefore, as shown in FIG. 21, the periphery of the slab 1 is covered with the cover 10, the air in the cover 10 is exhausted, and the dust is removed by the dust collector 11. The dust collector 11 is of a stationary type and needs to be connected to a cover 10 attached to the moving grinder 2 by a flexible duct 12. The collected dust particles are discharged into a collection bag 14 in a batch manner by a discharge device 13 including a screw conveyor or the like, and are conveyed to a recovery process for reuse as resources.

[0005] Prior art relating to the collection of grinding waste such as grinding dust and grinding powder in the above-mentioned flaw removal equipment is disclosed in, for example, JP-A-49-13777 and JP-A-5-27794.
1 and the like. Japanese Patent Laid-Open No. 49-13777 discloses a concept in which grinding powder sucked by a stationary dust collector 11 as shown in FIG. 21 is collected to a certain extent by a suction box provided in the grinder 2. Japanese Patent Laid-Open No. 5-
277941 shows the idea of collecting and cooling the grinding dust 4 generated by the grinding with the rotary grindstone 3 as shown in FIG.

[0006]

Grinding dust 4 generated when the surface of the slab 1 is ground with the rotary grindstone 3 as shown in FIG. 20 has a considerably high temperature, and the belt conveyor 6 causes an accidental fire. There is fear. Since the grinding dust 4 is in the form of fine particles, it is not possible to use a metal mesh or the like for the belt conveyor 6, and it is necessary to use a belt containing rubber or the like. For this reason, the heat resistance is low, and if a large amount of high-temperature grinding dust 4 accumulates, there is a risk of burning. When the grinding dust 4 is fully stored in the grinding dust bag 7 waiting on the downstream side of the belt conveyor 6, it is necessary to replace the grinding dust bag 7 with the crane 9. If the belt conveyor 6 is moving during the replacement operation of the grinding waste bag 7, the grinding waste 4 will not be collected in the grinding waste bag 7 and will be scattered around the standby position. However, when the belt conveyor 6 is stopped, the heat of the grinding dust 4 easily causes burnout of the conveyor belt. In order to prevent the burnout accident due to the grinding dust 4, it is necessary to stop the grinding by the grinder 2 when replacing the grinding dust bag 7.

[0007] As shown in FIG. 21, in the configuration in which the dust-like grinding powder is collected by the stationary dust collector 11, the grinder 2 moves along a relatively long distance along the rail 5.
And the duct 12 is rather large.
When the collected dust collects in the dust collector 11, it is necessary to operate the dispensing device 13 to discharge the dust in a batch manner.

In the prior art shown in FIGS. 20 and 21, since grinding dust and grinding powder are collected in a batch system, automation is difficult and labor is required. In the prior art of Japanese Patent Application Laid-Open No. 49-13777, since the grinding powder is collected through a suction box and collected, the collection efficiency of the grinding powder can be improved, but the stationary dust collector is of a large scale. In addition, the processing of the collected grinding powder must be performed in a batch system, so that the equipment becomes large-scale and requires many operators. Since the equipment becomes large-scale, it becomes difficult to arrange many flaw removing devices, and this is an obstacle to improving the work efficiency of the flaw removing process. In the prior art of Japanese Patent Application Laid-Open No. 5-277941,
Grinding chips that are ground by the rotating grindstone are collected using cooling water. Grinding chips get wet with water, so when grinding chips are dissolved and reused, extra energy is required to evaporate the water, and the evaporated water expands rapidly, which can hinder the dissolution work etc. There is also. In addition, hydrogen generated by the decomposition of water may enter the steel slab, thereby deteriorating the mechanical properties of the steel slab.

SUMMARY OF THE INVENTION It is an object of the present invention to efficiently collect grinding waste generated when grinding a surface flaw or the like on a steel slab, prevent a burnout accident without getting wet with water, and provide a flaw removing equipment. An object of the present invention is to provide a method and an apparatus for recovering a grinding waste from a billet flaw removing equipment capable of improving an operation rate.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a method of recovering a grinding discharge from a flaw removal equipment for grinding and removing a surface flaw or the like of a billet by a rotating grindstone. The steel is characterized in that grinding chips generated during grinding of the steel are once dropped on a cooling wall and then dropped, the falling grinding chips are received by a vibrating conveyor having a metal surface, and are transported and collected in a horizontal direction. This is a method for collecting the grinding waste from the single-sided flaw removal equipment.
According to the present invention, grinding dust generated when grinding the surface of the steel slab by the rotating grindstone once hits the cooling wall and is cooled without getting wet with water. Grinding chips that are cooled by the cooling wall and fall are received by a metal vibrating conveyor, conveyed horizontally, and collected. Since the surface of the vibrating conveyor is made of metal, it is easy to withstand the heat of grinding chips at a relatively high temperature, and it is easy to stop the transportation of the grinding chips. For example, when a container or the like that receives grinding dust is full on the downstream side of the vibrating conveyor, the vibrating conveyor can be stopped to replace the container, and grinding can be continued to ensure operation of the flaw removal equipment.

[0011] In the present invention, the collection of the grinding dust is performed by separating the scrap according to the main components of the billet. According to the present invention, since the collection of grinding waste is performed by separating according to the main components of the steel slab, for example, in stainless steel, nickel-based and chromium-based can be separated and effective reuse can be achieved respectively.

Further, the present invention is characterized in that grinding debris from a plurality of steel slabs is collectively collected in one place by using the vibrating conveyor. According to the present invention, since grinding chips from a plurality of billets are collected and collected at one place, processing such as movement of grinding chips between the flaw removal equipment and the equipment for collection can be efficiently performed. Can be.

[0013] Further, the present invention provides a method wherein the grinding chips conveyed by the vibrating conveyor are dropped on a belt conveyor, the grinding chips continuously conveyed by the belt conveyor are stored in a collection container, and the collection container is raised. It is characterized in that the grinding waste in the collection container is transferred to a vehicle for transferring to a recycling facility. According to the present invention, the grinding waste generated by grinding the surface of the steel slab by the rotating grindstone is cooled by the cooling wall, and further cooled when being conveyed on the vibrating conveyor, so that when further conveyed by the belt conveyor. The temperature can be reduced to a level that does not cause an accident such as burnout. After the grinding waste is efficiently conveyed by using the belt conveyor and further stored in the collection container, the collection container can be lifted and easily transferred to a vehicle to be used as a recycling facility. Even if the transportation by the vibrating conveyor is stopped to stop the supply of grinding waste to the belt conveyor when transferring the collection container,
Since the surface of the vibrating conveyor is made of metal, even if a large amount of grinding debris accumulates, there is little risk of burnout.

[0014] The present invention also removes surface flaws and the like while moving the entire flaw removing device provided with the rotary grindstone in one direction with respect to the stopped steel slab, and exhausts the atmosphere around the rotary grindstone. A dust collector for removing grinding powder from the exhaust gas is mounted on the flaw removing device, and the vibrating conveyor is disposed so as to extend in the moving direction of the flaw removing device, and the grinding dust collected by the dust collector and the grinding dust are mixed. And collect it. According to the present invention, it is possible to mount a dust collector on the flaw removing device, remove and collect grinding powder from exhaust air around the rotary grindstone, and collect it together with grinding dust on the surface of the vibrating conveyor.
Since the fine grinding powder is transported in a state of being mixed with the grinding waste, it is possible to efficiently reuse the grinding waste without transporting the fine grinding powder during transport and reuse processing. it can.

Further, the present invention is an apparatus for recovering a grinding discharge from a flaw removal equipment for grinding and removing a surface flaw or the like of a billet by a rotating grindstone, wherein the grind discharge is collected in one direction with respect to the stopped billet. A flaw removing device that is movable and has a mechanism for feeding the rotating grindstone in a direction intersecting the moving direction, and in the flaw removing device, is arranged on a flight path of grinding dust generated during grinding by the rotating grindstone, and cools the grinding dust. A cooling wall that is arranged to extend downward in the direction of movement of the flaw removing device, and a vibrating conveyor that is arranged so that grinding chips falling from the cooling wall are deposited on a metal surface and transported in one direction. It is a grinding waste collection device of the billet removal equipment. According to the present invention, by the cooling wall provided in the flaw removing device, grinding chips generated when the surface of the billet is ground by the rotating grindstone are cooled without getting wet with water and fall on the surface of the metal vibration conveyor. ,accumulate. Even if the generated grinding dust is at a high temperature, it is cooled by the cooling wall and is further deposited on the surface of the metal vibrating conveyor.

Further, in the present invention, the flaw removing device includes a hood having an upper portion opened larger than the lower portion below the cooling wall and guiding falling grinding chips to the surface of the vibration conveyor.
A grid provided in the middle of the hood and having a constant pitch. According to the invention, the grinding debris, which is cooled by the cooling wall and falls, is guided by the hood and reliably deposits on the vibrating conveyor having a metal surface.

Further, in the present invention, the flaw removing device includes an exhaust device for exhausting air around the rotating grindstone, and removing the grinding powder from the air exhausted by the exhaust device. And a dust collector for dropping on a surface of the conveyor. According to the present invention, the air around the rotary grindstone is exhausted by the exhaust device, and the dust is collected from the exhaust air by the dust collector. Since the dust collector drops the collected grinding powder on the vibrating conveyor, it is not necessary to store the collected grinding powder and process it in a batch system.The configuration of the dust collector can be reduced in size and easily mounted on a flaw removal device. Thus, the collected grinding powder can be mixed with the grinding dust on a vibrating conveyor without any need for manual operation, and can be efficiently transported and reused.

[0018]

FIG. 1 shows a schematic configuration for recovering grinding waste from a billet flaw removing equipment according to an embodiment of the present invention. The slab 21, which is a steel piece, is ground by the rotating grindstone 23 of the grinder 22, and the surface including the defect is removed as grinding dust 24. Grinder 2 which is a flaw removing device
2 is a rail 25 extending parallel to the longitudinal direction of the slab 21
You can travel on it. Since the grinding waste 24 is relatively hot, before being collected by the belt conveyor 26, the surface of the grinding waste 24 is deposited on a metal vibration conveyor 27 and is conveyed onto the belt conveyor 26 by intermittent vibration. The collected grinding waste 24 is conveyed by a collection vehicle 28 to a collection facility for recycling as resources. Belt conveyor 2
A collection bag 29 is disposed on the downstream side of the collection bag 6. When the grinding dust 24 accumulates in the collection bag 29, the collection bag 29 is raised by the skip elevator 30 and the collection vehicle 28 is collected.
Grinding chips 24 are dropped into the inside.

Although the grinding operation by the grinder 22 is performed above the factory floor, the vibration conveyor 27
The belt conveyor 26 moves the grinding dust 24 by using the drop due to gravity, and therefore is disposed below the floor surface. The skip elevator 30 moves the collection bag 29 vertically below the floor surface to transfer the collected grinding chips 24 to the collection vehicle 28 traveling on the floor surface level.

When the surface of the slab 21 is ground by the rotating grindstone 23, fine dust-like grinding powder is also generated. The grinding powder is composed of the metal component on the surface of the slab 21 and the rotating grindstone 23.
The abrasive grains and the binder are powdered and collected by the dust collector 31 as dust. The dust collector 31 injects the air around the rotary grindstone 23 through the duct 32, collects the grinding powder with an internal filter, and discharges the purified air into the atmosphere. Grinding powder collected in the dust collector 31 is supplied from the valve 33 through the discharge chute 34 to the vibration conveyor 27.
Is discharged on top.

The surface of the vibrating conveyor 27 is made of an iron plate, as will be described later, and there is no risk of burnout even if the grinding dust 24 heated by friction during grinding is deposited. However, the belt conveyor 26 downstream of the vibration conveyor 27 is
Since the heat resistance of the rubber belt is about 200 ° C., it is not preferable to transport the grinding dust 24 having a very high temperature onto the belt conveyor 26. In the present embodiment, when the grinding waste 24 is dropped onto the vibrating conveyor 27, the grinding waste 24 is caused to collide with a water-cooled jacket 35 which is a cooling wall. The jacket 35 is arranged on the flight path of the grinding chips 24 generated during grinding, and when the flying grinding chips 24 hit, cools without wetting with water and drops downward. A hood 36 is provided in the falling path of the grinding waste 24, and the upper opening area is large and the lower opening area is small.
The grinding chips 24 falling on the surface of 7 can be guided and collected. A grid 37 having a constant pitch is arranged in the middle of the hood 36 to prevent the grinding dust 24 having a large diameter from dropping. Since the grinding dust 24 having a large diameter is not cooled in a short time, there is a risk that the belt conveyor 26 may be burned after being accumulated on the vibrating conveyor 27.
Remove in advance. In the skip elevator 30, the collection bag 29 containing the collected grinding waste 24 is pulled up by the winch 38, and the grinding waste as the contents of the collection bag 29 is discharged into the collection vehicle 28.

FIG. 2 shows a schematic layout configuration relating to the flaw removing equipment 41 to be collected of the grinding waste shown in FIG. On the upstream side of the flaw removing equipment 41, a continuous casting equipment 42 of various stainless steels is arranged, and on the downstream side, a shipping equipment 43 to a hot rolling equipment at a remote position is arranged.
The slab 21, which is a steel slab to be flaw-removed, is manufactured by cutting a continuous cast material 44 with a cutter device 45. Various casting defects, such as cracks and bubbles, may be present on the surface of the continuous casting material 44. To remove this casting defect, a grinding line 46 is provided. The surface of the slab 21 that has been ground by the grinding line 46 is inspected by the surface inspection device 47, and then only the steel slab 21 that satisfies a predetermined quality standard is shipped from the shipping facility 43 to the process.

The slab 21 for grinding the surface flaws in the grinding line 46 is transported to the starting end 52 a of the transport line 52 by the transport crane 50. Start end 52 of transport line 52
The transport vehicle 53 can reciprocate between “a” and the terminal portion 52b. The carrier 53 on which the slab 21 is placed at the start end 52a stops at the grinding line 46, and transfers the slab 21 to the grinding line 46 to remove surface defects by grinding. Near the middle of the transfer line 52, a central operation room 54
Is provided, and the operation of the entire operation of the flaw removal equipment 41 is performed. Grinding waste 24 generated when grinding the slab 21 in the grinding line 46 is collected by a collecting device 55.

In the grinding line 46, a plurality of grinders 22 are arranged along the transport line 52. Further, a plurality of grinders 22
Is arranged. A roller table 60 for transporting the slab 21 is provided in parallel with the rail 25 of each grinder 22. Each grinder 22 is provided with a roller table 60.
And can grind the surface of the slab 21 placed on the roller table 60. A reversing device 61 for reversing the vertical direction of the slab 21 is provided near the middle of the grinder 22. Grinder 22
It takes a relatively long time to grind the slab 21 and the reversing by the reversing device 61 can be performed in a relatively short time. For example, one reversing device 61 is arranged for four grinders 22. The reversing device 61 is treated by a cart 62, is movable on a rail 63, and is capable of reversing the slab 21 with respect to the four grinders 22. Further, a roller table 64 for transporting the slab 21 directly from the transport line 52 to the reversing device 61 is provided.

The transfer line 52 and the grinding line 46 can automatically transfer the slab 21 and can also transfer and grind the slab 21 having a high temperature of about 600 ° C. Depending on the type of steel, the higher the temperature, the higher the grinding efficiency and the shorter the grinding time.

FIG. 3 shows a configuration related to the collecting device 55 shown in FIG. The vibration conveyor 27 provided for each grinder 22 includes a rail 25, a roller table 60,
It extends parallel to 64. The downstream side of each vibrating conveyor 27 is
It is connected to the belt conveyor 26 extending parallel to the running rail 63 of the reversing device 61. On the downstream side of the belt conveyor 26, a skip elevator 30 is installed, and the collected grinding waste is transshipped to a collection vehicle 28.

FIGS. 4 and 5 show a detailed configuration related to the grinder 22. FIG. FIG. 4 is a plan view, and FIG. 5 is a side sectional view. The grinder 22 is configured as a gate having a frame 70 movable on the rail 25. In the frame 70, a base 71 is provided at a position higher than the transfer position of the slab 21. Dolly 7 on base 71
2 can travel in a direction perpendicular to the traveling direction of the frame 70. The carriage 72 holds the rotating grindstone 23 and a motor 73 for rotating the grindstone by an elevating device 74, and can travel along a rail 76 on a frame 70 by wheels 75. When the surface of the slab 21 is ground by the rotary grindstone 23, the slab 21 is cooled by hitting a water-cooled jacket 35 arranged in the path of flying grinding chips, and falls from the lower hood 36 onto the vibrating conveyor 27. The grinder 22 is moved along the longitudinal direction of the slab 21 by the wheels 77 by the rails 25.
Move up. Grinding debris accumulates on the vibration conveyor 27 while moving on the rail 25.

FIGS. 6, 7, and 8 show a plan view, a front view, and a right side view of the vibrating conveyor 27, respectively. The vibration conveyor 27 includes an iron surface plate 80 and a lower base 81.
Between the arm 8 and the arm 8 provided at an interval in the longitudinal direction.
2 and a spring 83. The surface plate 80 can convey grinding chips deposited on the surface in one direction by vibration generated by a crank mechanism 85 driven to rotate by a motor 84. Since the surface plate 80 is made of iron, 500
Grinding chips having a high temperature of about 600 ° C. can be deposited without fear of burning. Grinding chips are cooled during transportation, and are cooled to about 70 to 80 ° C. on the downstream side.

FIGS. 9, 10, and 11 show a plan view, a front sectional view, and a right side view of the collection line by the belt conveyor 26, respectively. On the downstream side of the belt conveyor 26, a skip elevator 30 including a collection bag 29 is provided.
Is arranged. A damper device 86 is provided at the end of the belt conveyor 26, and the collection bag 29 is connected to the winch 38.
During the period of being pulled up, the grinding waste conveyed by the belt conveyor 26 can be stored.
Although the grinding waste transferred onto the belt conveyor 26 is cooled to a relatively low temperature, when the belt conveyor 26 stops, the conveyor belt that is weak to high temperatures may be burned. The collection bag 29 includes a skip elevator 30
Along the guide rail 87. Collection bag 2
9 is raised by pulling up the wire 88 by the winch 38. A chute 89 is provided above the skip elevator 30 to drop the contents of the collection bag 29 into the collection vehicle 28 as uniformly as possible.

FIGS. 12, 13 and 14 show a front view, a right side view and a plan view of the skip elevator 30, respectively. The guide rail 87 allows the collection bag 29
A curved portion 87a is provided on the upper portion of the guide rail 87 so that the contents of the guide rail 87 can be efficiently put into the chute 89.

FIGS. 15 and 16 show a front view and a left side view of the damper device 86, respectively. Damper device 86
Has a fixed chute 90 and a variable chute 91, and the direction of the variable chute 91 can be changed by a cylinder 92. If the direction of the variable chute 91 is downward, the grinding waste conveyed from the belt conveyor 26 falls from the fixed chute 90 into the collection bag 29 via the variable chute 91. When the direction of the variable chute 91 is horizontal, the grinding discharge does not fall and stays in the damper device 86. In the skip elevator 30 of the present embodiment, it takes about 2 minutes to pull up the collection bag 29 to release the contents and then lower the collection bag 29 again. Grinding debris is stored in the damper device 86 during this time.

FIG. 17 shows the arrangement of a water-cooled jacket 35. The jacket 35 is provided at a corner of a cover 93 that covers the inside of the grinder 22, and
4 collide. The jacket 35 is water-cooled, and cools down without contacting the grinding waste 24 and falls down.

FIG. 18 shows a schematic electrical configuration for controlling the apparatus for collecting the grinding waste shown in FIG. Information such as the type of steel of the slab 21 that is being ground by each grinder 22 of the grinding line 46 is input to the control device 100 that is implemented including a computer. With reference to FIG.
Since two belt conveyors 26 are provided on the side closer to and farther from the transport line 52 with respect to 1, the belt conveyors 26 are controlled so that grinding chips having the same type of components are transported. For example, in the case of using stainless steel, it is preferable to separate nickel and chromium based on their components. If the components are separated, it is easy to put the collected grinding waste into an electric furnace or the like for reuse. When the components of the grinding waste conveyed to the same belt conveyor 26 are different, one vibrating conveyor 2
Step 7 is stopped to avoid mixing of grinding chips of different components. The control device 100 estimates the collection state of the grinding dust in the collection bag 29 from the operation state of each grinder 22,
The transfer to the collection vehicle 28 is performed by the skip elevator 30.

FIG. 19 shows the operation of the control device 100 of FIG. The operation starts from step a1 and proceeds to step a2
Then, it is determined whether or not a plurality of grinders 22 to which grinding chips are conveyed by the same belt conveyor 26 are grinding slabs of the same type of steel. When it is determined that the component systems are different at the time of switching or the like, the vibration conveyor provided in the grinder 22 having the shorter grinding time is moved to step a3.
Stop at In step a4, it is determined whether or not grinding of steel types of different component systems has been completed. If not finished, stop. If it is determined in step a2 that the steel types are of the same component system, or if it is determined in step a4 that the grinding of steel types of different component systems has been completed, the vibration conveyer 27 conveys the grinding discharge in step a5. Next, in step a6, the conveyance by the belt conveyor 26 is performed. At step a7, it is determined whether or not the collection bag is full. If it is not full, the process returns to step a5. When it is determined that the collection bag is full, at step a8, the damper device 86
Is raised, and in step a9, the collection bag 29 is raised by the skip elevator 30 and transferred to the collection vehicle 28. Next, the collection bag 29 is returned in step a10, the variable chute 91 is lowered in step a11, and the process returns to step a5.

In the embodiment described above, the grinding waste generated when grinding for removing surface defects of the slab 21 manufactured from the continuous casting equipment of stainless steel is collected. However, the same can be applied.

[0036]

As described above, according to the present invention, grinding dust generated when grinding the surface of a steel slab with a rotary grindstone is reduced.
Since it is cooled by the cooling wall and conveyed by a vibrating conveyor having a metal surface, it is possible to prevent the occurrence of fire damage even without being wet with water, and to efficiently collect grinding waste.

In addition, according to the present invention, since the recovery of the grinding waste is performed separately according to the main component of the steel slab, the reuse of the grinding waste can be effectively performed.

Further, according to the present invention, grinding chips from a plurality of steel pieces are collectively collected at one place, so that the grinding chips can be efficiently transported to a recycling facility or the like.

Further, according to the present invention, the temperature of the grinding chips is reduced when they are deposited and conveyed on a vibrating conveyor, so that a belt conveyor can be used for conveying a longer distance. And even if the belt conveyor is located below the floor of the factory, the collection container is raised and transferred to a vehicle for transferring the grinding waste in the collection container to the recycling facility, which enables efficient transfer. It can be carried out.

Further, according to the present invention, since the steel slab is collected by a dust collector generated when grinding the surface of the slab, mixed with grinding swarf on a vibrating conveyor, and conveyed, grinding powder soars during handling. Prevention and effective use of the grinding waste.

Further, according to the present invention, the grinding dust generated when grinding the steel slab by the rotating grindstone of the flaw removing device is cooled by the cooling wall arranged in the flight path, falls down, and falls to the metal. It is deposited on a vibrating conveyor having a surface and transported in one direction. Since the vibrating conveyor is arranged to extend along the moving direction of the flaw removing device, even if the flaw removing device moves and grinds the surface of the steel slab, the generated grinding debris accumulates on the surface of the vibrating conveyor. Can be done. Even if the grinding dust is at a high temperature, it is cooled by the cooling wall and further deposited on the metal surface of the vibrating conveyor, so that it is possible to prevent the occurrence of fire damage without getting wet with water.

Further, according to the present invention, the grinding chips cooled and dropped by the cooling wall are surely guided to the surface of the vibrating conveyor by the hood, and the grid having a constant pitch is provided in the middle of the hood. Even large grinding debris can be removed. Since large grinding debris does not cool down easily, it can be kept at a fairly high temperature even after it has been dropped and conveyed on a vibrating conveyor and can be burned out, but can be removed beforehand by means of a grid.

According to the present invention, a dust collector is provided in the flaw removing device, the grinding powder is collected from the exhaust air of the rotary grindstone, and the collected grinding powder is discharged onto a vibrating conveyor and transported in a state mixed with the grinding dust. can do. Grinding powder with fine particles can be mixed and handled so that it adheres to the surface of grinding dust having a larger particle size than grinding powder, so it does not fly up during handling and effectively reuses grinding waste as a resource can do.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a plan view showing a schematic layout configuration of the entire billet flaw removing facility including the configuration for recovery in FIG.

FIG. 3 is a plan view of a grinding line 46 of FIG.

FIG. 4 is a plan view of the grinder 22 of FIG.

FIG. 5 is a side sectional view of the grinder 22 of FIG. 2;

FIG. 6 is a plan view of the vibration conveyor 27 of FIG.

FIG. 7 is a front view of the vibration conveyor 27 of FIG.

FIG. 8 is a right side view of the vibration conveyor 27 of FIG.

FIG. 9 is a plan view of a collection line using the belt conveyor 26 of FIG.

FIG. 10 is a front sectional view of a collection line using the belt conveyor 26 of FIG. 2;

11 is a left side view of a collection line using the belt conveyor 26 of FIG.

FIG. 12 is a front view of the skip elevator 30 of FIG.

FIG. 13 is a right side view of the skip elevator 30 of FIG.

FIG. 14 is a plan view of the skip elevator 30 of FIG.

FIG. 15 is a front view of the damper device 86 of FIG. 9;

FIG. 16 is a right side view of the damper device 86 of FIG. 9;

FIG. 17 is a front sectional view of the jacket 35 of FIG. 1;

18 is a block diagram showing a schematic electrical configuration for controlling the recovery device 55 of FIG.

19 is a flowchart showing the operation of the control device 100 of FIG.

FIG. 20 is a side view showing a schematic configuration for collecting grinding chips according to a conventional technique.

FIG. 21 is a side view showing a schematic configuration for collecting grinding powder of a grinder according to the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Slab 22 Grinder 23 Rotating grindstone 24 Grinding waste 26 Belt conveyor 27 Vibration conveyor 29 Collection bag 30 Skip elevator 31 Dust collector 35 Jacket 36 Hood 37 Grid 41 Deposition equipment 42 Continuous casting equipment 46 Grinding line 50 Transport crane 52 Transport line 53 Transport cart 55 Collection device 60, 64 Roller table 70 Frame 71 Base 72 Cartridge 80 Surface plate 81 Base 82 Arm 84 Spring 85 Crank mechanism 86 Damper device 90 Fixed chute 91 Variable chute 92 Cylinder 100 Control device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Yoshikawa 4976 Nomura Minamimachi, Shinnanyo-shi, Yamaguchi Nisshin Steel Co., Ltd. Shunan Steel Works (72) Inventor Sotsuo Yamaguchi 1-3-3 Nakadori, Kure-shi, Hiroshima No. 16 Nissin Koki Co., Ltd. (72) Inventor Mikio Hayase 1-316 Nakadori, Kure-shi, Hiroshima Pref. No.3-16, Nisshin Koki Co., Ltd.

Claims (8)

[Claims] 1. A method for recovering grinding waste from a flaw removal equipment for removing surface flaws and the like of a slab by grinding with a rotary grindstone, wherein grinding debris generated when grinding the slab surface with the rotary grindstone is provided. ,
The grinding waste is collected by a vibrating conveyer with a metal surface, and is transported and collected in a horizontal direction. Method. 2. The method according to claim 1, wherein the grinding chips are collected separately according to the main components of the billet. 3. The collection of grinding waste from a scrap removing device according to claim 1, wherein the vibrating conveyor collects grinding chips from a plurality of billets at one place. Method. 4. The grinding debris conveyed by the vibrating conveyor is dropped onto a belt conveyor, the grinding debris continuously conveyed by the belt conveyor is stored in a collection container, and the collection container is lifted up. The grinding waste is transferred to a vehicle for transferring the same to a recycling facility.
4. The method for recovering grinding waste from a billet flaw removing equipment according to any one of claims 1 to 3. 5. An entire flaw removing device including the rotating grindstone,
The slab in the stopped state is moved in one direction to remove surface flaws and the like, the atmosphere around the rotary grindstone is evacuated, and a dust collector for removing grinding powder from the exhaust is mounted on the flaw removal device. The vibrating conveyor is disposed so as to extend in the moving direction of the flaw removing device, and the grinding dust collected by a dust collector and the grinding dust are mixed and collected.
5. The method for recovering grinding waste from a billet defect removing equipment according to any one of the above. 6. An apparatus for recovering a grinding waste from a flaw removing equipment for removing a surface flaw or the like of a billet by grinding it with a rotary grindstone, wherein the apparatus is capable of moving in one direction with respect to a stopped billet. A flaw removing device provided with a mechanism for feeding the rotating grindstone in a direction intersecting with the moving direction; and, in the flaw removing device, arranged on a flight path of grinding dust generated when grinding by the rotating grindstone, cools the grinding dust downward. It is characterized by including a cooling wall to be dropped, and a vibrating conveyor arranged so as to extend in the moving direction of the flaw removing device, to deposit grinding chips falling from the cooling wall on a metal surface and to convey it in one direction. Grinding waste collection equipment for billet scrap removal equipment. 7. The device for removing flaws below the cooling wall,
7. The hood according to claim 6, wherein the hood has a larger opening than the lower part, and has a hood for guiding falling grinding chips to the surface of the vibrating conveyor, and a grid provided in the middle of the hood and having a constant pitch. Grinding waste collection equipment for billet scrap removal equipment. 8. A flaw removing device, comprising: an exhaust device for exhausting air around the rotary grindstone; removing grinding powder from air exhausted by the exhaust device; and collecting the collected grinding powder on the surface of the vibrating conveyor. 8. A grinding waste collecting apparatus for a billet flaw removing equipment according to claim 6, further comprising a dust collector for dropping the scraps.