JP2001170610A - Method for recovering cathode ray tube glass and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for recovering cathode ray tube glass which is capable of efficiently peeling and removing coatings and obtaining high production efficiency by making work easy and a device therefor. SOLUTION: A cylindrical body 40 containing crushed glass pieces is rotated in an outer peripheral direction and the glass pieces are lifted and dropped by large agitating vanes 46 within the cylindrical body 40. The glass pieces collide against each other and the coatings on the inside and outside surface of glass bulbs 11 may be effectively peeled and removed with simple constitution. Since a cylindrical body 11 inclines, the glass pieces are obliquely downwardly transported by the rotation and inclination of the cylindrical body 11 and particulates are separated by a mesh filter 50 during the course of the transportation. Metallic parts are separated and removed by an electromagnet 59.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for collecting CRT glass for collecting a glass bulb of a CRT.

[0002]

2. Description of the Related Art Generally, a cathode ray tube, for example, a color cathode ray tube, has a glass bulb 11 serving as an envelope, as shown in FIG. I'm nervous.

Further, a glass bulb 11 is composed of a panel 13 forming a display surface and a funnel type funnel 14 formed of frit glass.
It is sealed together at 15. On the inner surface of the panel 13, a film such as a BC (Black Coating) dough 17, a phosphor 18 and aluminum 19 is applied or vapor-deposited, and a metal shadow mask 20 is sealed at one end in the glass bulb 11. It is erected by a metal panel pin 21.

[0004] On the other hand, a metal anode terminal 22 is sealed in glass in the funnel 14, and the inner surface of the anode tube 22 is coated with graphite as a coating material except for a part of the neck tube 23 and the vicinity of the sealing end. The inner dug 24 which is an interior conductive film mainly composed of is coated and formed. In addition, an outer coating 25 mainly composed of graphite and an outer coating 25 mainly composed of silicon varnish are coated on the outer surface in the vicinity of the anode terminal 22, along with an outer coating 25 composed of graphite.

[0005] The glass bulb 11 in which the panel 13 and the funnel 16 are integrally sealed is formed. After the electron gun 27 is inserted into the end of the neck tube 23, the neck tube 23 is closed.
The electron gun 23 and the base glass of the electron gun 27 are sealed, and further evacuated from an exhaust pipe (not shown) of the electron gun 27, and the interior of the cathode ray tube is evacuated by sealing the exhaust pipe 27a. Also,
This CRT is completed by attaching a part of the panel 13 to the metal band 12 and attaching a resin base 28 thereto.

When such a color CRT becomes defective during the manufacturing process or when the color television is used, the glass bulb 11 is collected and used as a glass raw material for producing the glass bulb 11 again. Has been reused. In this case, the panel 13 and the funnel 14 must be separated and collected, respectively, due to the difference in glass composition. However, a part of the panel glass or the frit glass 15 may be mixed in the funnel glass. For this reason, when separating the glass bulb 11 after sealing for separation, a portion near the frit glass 15 of the panel 13 is cut.

After the panel 13 is cut, the metal band 12, the shadow mask 20, the electron gun 27, etc. are removed first,
Various coatings applied or deposited on the inside and outside of the glass bulb 11 are peeled off, and the glass bulb 11 is crushed to remove metal parts such as the anode terminal 22 and the panel pin 21 enclosed in the glass.

[0008] In order to peel off and remove various coating materials formed inside and outside the glass bulb 11, first, as a first method, the glass surface is melted using hydrofluoric acid to peel the coating material. Methods of removing are known.

However, there is a problem of safety and health with respect to hydrofluoric acid, and if this hydrofluoric acid gas leaks into the atmosphere, it is not preferable to the atmosphere. Further, sludge is generated because the treatment agent is used for wastewater treatment. The main process is
The process involves putting the panel 13 or the funnel 14 into the apparatus, treating with hydrofluoric acid, washing with water, and drying. The process is long, and requires a complicated equipment configuration to handle easily breakable glass, resulting in poor production efficiency. In addition, the costs required for hydrofluoric acid, wastewater treatment agents, sludge disposal, etc. overlap, increasing production costs.
It may not be environmentally friendly.

Next, as a second method, as shown in FIG. 8, a crushed glass piece 32 is put into a tub 31 together with an abrasive and a small amount of water, and the mixture is stirred by a motor 33 with a stirring blade 34 to be applied. A method of peeling and removing an object is known.

However, in this method, a glass piece 32 is placed in a tub.
Harmful dust is generated when thrown into 31. In addition, since the pouring operation is troublesome because polish and water are also supplied at the same time, it is not preferable in terms of safety and health for workers. In addition, when taking out the glass piece 32 after the work, the taking-out work is complicated, such as taking out a fine particle of less than 1 mm by a water shower, taking out the large particles in the upper layer, and regularly taking out the fine particles into another container. . In addition, it is necessary to air-dry the taken-out glass pieces, which requires a large space and is complicated. Further, during processing, the abrasive and the small glass piece are located in the lower layer, and the large glass piece is easily located in the upper layer, so the mixing ratio of the abrasive is smaller for the large glass piece in the upper layer, This will delay the removal of the coating material. For this reason, the speed of removing and removing the applied material becomes uneven, which takes time, and it is difficult to increase the production efficiency.

As a third method, as shown in FIG. 9, a crushed glass piece 32 is placed in a cylindrical container 35 placed horizontally and sealed, and the container is rotated at a high speed by a motor (not shown). A method is known in which the glass pieces 32 are rubbed against each other to peel off and remove the coating material.

However, in this method, the cylindrical container 35
If the glass is not rotated at high speed, the glass pieces put inside cannot be agitated, so that large power is required and the whole equipment needs to be rugged. In addition, after the treatment, fine particles having a particle size of less than 1 mm must be sorted in another step, which is complicated.

Further, as a fourth method, there is known a method in which an abrasive is mixed into air, sprayed at a high speed, and the coated material is peeled off.

However, in this method, since the processing is performed while moving the injection nozzle, the entire glass bulb 11 cannot be processed at the same time, and a long processing time is required. In particular,
In the case of the funnel 14, since the coating material is present on the inner and outer surfaces, the inner surface must be processed first, and then the outer surface must be processed. Hang on. Further, when the size of the color CRT is different, it is necessary to switch the processing conditions each time. Furthermore, after the treatment is completed, the glass bulb must be crushed in a separate step to remove metal parts.
This is troublesome and dust adhering to the entire glass bulb is scattered, which is not preferable in terms of hygiene.

After the coated material is peeled and removed by such a method, the crushed glass is recovered.
Fine glass particles having a particle size of less than 1 mm have a low thermal conductivity when placed in a glass melting furnace, have a low melting efficiency, and cannot be used due to the intervening bubbles.

[0017]

As described above, in the conventional example, when hydrofluoric acid is used for peeling and removing the coating material formed on the inner and outer surfaces of the glass bulb, if the gas leaks into the atmosphere, Is not preferable, and sludge is generated.

When the crushed glass piece 32 is stirred with an abrasive and water with a stirring blade, the glass piece is placed in a tub 31.
It is difficult to improve production efficiency, for example, harmful dust is generated at the time of charging, and it takes time to perform the charging operation.

Further, in the method in which the crushed glass pieces 32 are put into a cylindrical container and rotated at a high speed, a large power is required and the whole equipment needs to be rugged. Production efficiency is not improved.

Further, the method of spraying the abrasive mixed with air with the spray nozzle has a problem that a long processing time is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. The present invention provides a method and an apparatus for recovering a cathode ray tube glass, which can efficiently peel off and remove a coating material, and can obtain a high production efficiency by facilitating an operation. The purpose is to provide.

[0022]

According to the present invention, a glass piece obtained by crushing a glass bulb of a cathode ray tube is put into a cylinder having stirring blades, and the cylinder is rotated to lift the glass piece with the stirring blades and drop the glass piece. By doing so, the applied material of the glass piece is peeled and removed, and by rotating the cylinder containing the crushed glass piece, the glass piece is lifted by the stirring blade inside the cylinder, and dropped, The glass pieces collide with each other and peel off and remove the coating material provided on the inner and outer surfaces of the glass bulb with a simple configuration.

Further, the fine particles containing the separated material are separated and removed by a mesh filter, so that the fine particles containing the separated material can be easily separated.

Further, the metal parts are separated and removed by the electromagnet, so that the metal parts are easily separated.

Further, the fine glass particles are re-introduced into the cylinder to improve the peeling efficiency of the coated material. Fine glass particles which are difficult to reuse as glass material are re-introduced into the cylindrical body to peel the coated material. Improve efficiency.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cathode ray tube glass recovery apparatus according to one embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 40 denotes a cylindrical tubular body, and this tubular body 40 is supported by a gantry 41 in a state of being inclined in the longitudinal direction. The mount 41 is provided with a tilt adjuster 42, and adjusts the angle of the cylindrical body 40 supported by the mount 42 to an arbitrary angle. A hopper 43 is provided at the left end of the cylindrical body 40.
The crusher 44 is arranged on the hopper 43. The cylindrical body 40 is rotationally driven in a circumferential direction at a predetermined speed by a drive mechanism (not shown).

Further, the crusher 44 crushes, for example, the cut panel 13 of the glass bulb 11 of the cathode ray tube shown in FIG. 7, and employs an impact press type crushing method. The crusher 44 includes a pressurizing section 44a that moves up and down, and a mesh-shaped receiving section 44b fixed below the pressurizing section 44a. The panel 13 which is the material to be crushed supplied to is compressed and crushed. Then, the crushed glass piece 32 is fed into the cylinder 40 from the left end, which is the inclined upper portion of the cylinder 40, via the hopper 43.

The cylindrical body 40 has a stirring section 40a between a predetermined length from the upstream side in the length direction, a middle section on the downstream side as a fine particle separation section 40b, and a most downstream section as a metal component separation section 40c. And

As shown in FIG. 2, a plurality of large stirring blades 46 having a predetermined height α are provided on the inner peripheral surface of the stirring section 40a.
Are provided at regular intervals at a predetermined angle γ with respect to the rotation direction β. As shown in FIG. 1, the large stirring blade 46 is provided over the entire length of the stirring unit 40a in the longitudinal direction.
The glass piece 32 introduced from 43 is lifted from the bottom in the cylindrical body 40 and dropped from the rotating top onto the bottom, whereby the glass piece 32 is stirred in the cylindrical body 40. By this stirring operation, the glass pieces collide with each other, and the coating material is separated from the glass pieces.

As shown in FIGS. 3 and 4, the fine particle separating section 40b is provided with a plurality of middle stirring blades 47 at equal intervals on the inner peripheral surface of the cylindrical body 40. In this, the stirring blade 47 is bent in the rotation direction β of the cylindrical body, and at the tip end, as shown in FIG. 4, the powder including the glass fine particles and the coating material separated from the glass piece can pass through. Cylinder 40 with an interval of about δ
Confronts the inner peripheral surface. Further, as shown in FIG. 1, the middle stirring blade 47 is provided over the entire length of the fine particle separation section 40b, and the upper end in the length direction, which is the left end in FIG. 1, is closed. Large particles of glass are prevented from entering the back side of the stirring blade 47. On the other hand, the lower end in the length direction, which is the right end in FIG. 1, is not closed, so that even if large particles of glass enter the back side of the middle stirring blade 47, they can be discharged to the outside.

A cylindrical body facing the back side of each of these middle stirring blades 47
In the portion 40, slits 48 for discharge are provided along the length direction of the middle stirring blade 47, and these slits 48 are meshed through a mesh holder 49 as shown in FIG. Each of the filters 50 is attached.
Outside the cylindrical body 40 provided with these mesh filters 50, an annular fine particle receiver 51 is provided concentrically, and further,
The lower part is provided integrally with a fine particle discharge part 52.

The middle stirring blade 47 has a function of light stirring to enhance the filtering effect of the mesh filter 50 and a function of protecting the mesh filter 50 provided on the back side from being broken by the impact of a glass piece.

Further, a fine particle scraping plate 53 is provided on the outer peripheral surface of the cylindrical body 40 facing the fine particle receiver 51, as shown in FIG. The fine particles accumulated on the peripheral surface are scraped and discharged toward the fine particle discharge unit 52.

Further, a fine particle sorter 54 is provided below the fine particle separation section 40b of the cylindrical body 40. This fine particle sorter
54 sorts the fine particles discharged from the fine particle discharge unit 52 into glass fine particles and powder such as coating material powder and glass powder, and is disposed obliquely below the fine particle discharge unit 52 as shown in FIG. A reflector 55 is provided for receiving the fine particles discharged from the fine particle discharge unit 52, and a stop plate 56 is disposed obliquely at a position for receiving the glass fine particles reflected by the reflector 55.

Here, among the fine particles discharged from the fine particle discharging section 52, the glass fine particles have a strong repulsive force, so that they hit the reflecting plate 55 arranged obliquely and are repelled, and are stopped by the stopping plate 56. It is stored in a glass particle storage box 57 arranged below. On the other hand, powders such as applied powder and glass powder have a low repulsive force, so they fall without being repelled even when they hit the reflection plate 55, and are stored in a powder storage box 58 arranged below. .

The metal part separating portion 40c is formed at the inclined downstream portion of the cylindrical body 40. As shown in FIG. 6, a plurality of electromagnets 59 and small stirring blades 60 are provided on the inner surface in the circumferential direction. Are alternately arranged at equal intervals. The small stirring blade 60
In order to make metal parts such as the panel pins 21 and the anode terminals 22 shown in FIG.

When the plurality of electromagnets 59 reach the bottom dead center position 59a due to the rotation β of the cylinder 40, a switch (not shown) for controlling the energization of the electromagnets 59 is turned on to be excited. The top dead center position is determined by the rotation β of the cylinder.
When it reaches 59b, the switch turns off and is demagnetized. That is, each electromagnet 59 is in the excited state in the right half area of FIG. 6, and attracts and holds the metal component separated from the glass piece 32. Then, when reaching the top dead center position 59b, it is demagnetized, so that the holding force on the metal component is lost, and the metal component falls on the metal component receiver 61 provided below.

The metal component receiver 61 has a gutter shape.
A metal part that is provided at an upper portion inside the cylindrical body 40 to be inclined in the length direction and that is led out from the tip of the cylindrical body 40 at the right end in FIG. It is discharged into the metal part storage box 62 that has been set. In addition, the distal end of the cylindrical body 40 is open, and the glass pieces from which the fine particles and metal parts are separated are collected in a glass piece collection box 63 provided outside.

An exhaust pipe 64 is connected to an upstream portion of the cylindrical body 40 where the glass piece 32 is introduced. This exhaust pipe 64
The inside of the cylinder 40 is always maintained at a negative pressure so that dust and the like do not leak to the outside. That is, the inside of the cylinder 40 is set to a negative pressure state by a vacuum pump (not shown) communicating with the exhaust pipe 64, but air flows in from the inlet of the hopper 43, the mesh filter 50, and the outlet of the cylinder 40. In this case, the pressure difference from the atmospheric pressure becomes smaller in the order of hopper 43> mesh filter 50> cylindrical outlet. The setting of such a pressure difference is such that when the pressure difference at the cylindrical outlet is larger than the pressure difference at the mesh filter 50, the fine particles are removed from the mesh filter 50 by the mesh filter.
This is because they are discharged from the outlet of the cylindrical body 40 without being discharged from the cylinder. Further, a hood 65 is provided in a place where dust directly comes into contact with air in the work place, such as a discharge part from the cylindrical body 40, for example, a glass piece discharge part at the tip, so that the work place is not contaminated by dust.

Next, the operation of the above embodiment will be described.

First, the panel 13 cut from the glass bulb 11 of the cathode ray tube is supplied onto the receiving portion 44b of the crusher 44, and the pressurizing portion 44a is lowered to crush. At this time, the receiving part 44b
The glass pieces 32 having a certain size due to the mesh shape are put into the cylindrical body 40 from the hopper 43. At this time,
Since the cylinder 40 is rotating at a predetermined rotation speed, the glass piece
The 32 is lifted by the plurality of large stirring blades 46 in the cylindrical body 40, and falls to the bottom at the rotation top. By repeating this operation, the glass pieces 32 are agitated, collide with each other, and the coating material on the inner and outer surfaces is peeled off, and the metal parts embedded in the glass are also crushed and separated.

Further, since the cylindrical body 40 is inclined at a predetermined angle in the longitudinal direction, the glass piece 32, the powder or glass powder of the applied material peeled off by stirring, the glass particles, and the metal parts, etc. It is transported downstream in 40a and
Reaches 40b. Then, in the fine particle separating section 40b, the powder, glass powder, and glass fine particles of the application material, which are lightly stirred by the middle stirring blade 47 and peeled off, are separated from the tip δ of the middle stirring blade 47 by the distance δ of the tip of the middle stirring blade 47. It enters the back side, passes through the mesh filter 50, enters the particle receiver 51, and is discharged from the particle discharge unit 52 to the particle sorter 54. Among the discharged fine particles, the glass particles are separated from the powder components by the reflection plate 55, and stored in the glass fine particle storage box 57 via the stop plate 56. On the other hand, the powder such as the coating agent and the glass powder separated from the glass particles by the reflection plate 55 is stored in the powder storage box 58 as it is.

The glass piece and the metal part from which the fine particles have been separated and removed reach the metal part separation part 40c on the further downstream side. In the metal part separating section 40c, the metal part is attracted and separated from the glass piece by the electromagnet moved to the bottom dead center position 59a by the rotation of the cylinder 40, and is placed on the gutter-shaped metal part receiver 61 at the top dead center position 59b. Let it fall. For this reason, the metal component is led out of the cylindrical body 40 by the metal receiver 61 and is discharged into the metal component storage box 62.

The glass piece from which the fine particles and metal parts have been separated in this way is collected by its own weight into the glass piece collection box 63 provided outside from the tip of the cylindrical body 40.

Further, if glass particles, which are glass swarf generated by collision between glasses, are used as an abrasive, the peeling efficiency is further improved, and other abrasives, chemicals,
Since no water treatment agent is used, material costs can be reduced and global resources can be saved.

Further, since there are few restrictions due to the size of the glass bulb, it is possible to mix and process glass bulbs of different sizes. Because of this, handling is convenient,
The space required for sorting and storing glass bulbs is reduced, and equipment costs are also reduced.

Further, many processes can be connected unmanned,
In addition, since the dust can easily be coated on the opening, the influence of dust on the worker is small, and the concern of environmental pollution is reduced.

[0049]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment will be described.

In the first embodiment, a cylinder having an inner diameter of 900 mm, a total length of 10 m, a length of the stirring section 40 a of 8 m, a particle separation section 40 b and a metal component separation section 40 c of 1 m each is used as the cylindrical body 40. Used. Eight large stirring blades 46 having a height α = 146 mm are evenly attached to the inner peripheral surface of the cylinder 40 at an attachment angle γ = 60 °.

The distance δ between the tip of the middle stirring blade 47 and the peripheral surface of the cylindrical body is set to 3 mm to 5 mm. Then, the inclination angle of the cylindrical body 40 is set to 4 °. This inclination angle of 4 ° is obtained by inserting 1500 kg of glass pieces into the cylinder 40.
This is a value set so that the glass piece inserted from the hopper 43 exits from the outlet at the right end of the cylindrical body 40 in FIG. 1 after 10 minutes when operated at a rotation speed of 6 seconds. That is, it is a condition for the treatment for 10 minutes.

Further, the object to be recovered is to set the glass bulb 11 of a 15-inch color cathode ray tube from the frit glass 15 to one.
Panel 13 cut into a circle at a position distant to the 0 mm panel side
Part. At the time of processing, after removing the shadow mask 20 from the panel 13, the mesh space of the receiving portion 44b of the crusher 44 is supplied to the crusher 44 in which the space between the mesh portions, that is, the space through which the glass fragments can pass is 80 mm square. This crusher 44 crushes. A piece of glass crushed to a size of about 100 mm or less always has a glass piece amount of 1500 kg in the cylindrical body 40.
, And a coating film was peeled and removed by treatment for 10 minutes.

As a result, aluminum 19, phosphor 18, B
All the peeling qualities of the coating film such as C Doug 17 passed the limit sample defined by the glass bulb manufacturer as the taking-off quality. In addition, the particle size that can be reused as a raw material for glass bulbs
The recovery rate of large glass pieces of 1 mm or more was 92.8%.

Here, at the time of stirring in the cylinder 40, the large stirring blade
The glass pieces overflowing from the 46 gradually collapse while being lifted by the large stirring blades 46, but many glass pieces firmly riding on the large stirring blades 46 fall from almost the uppermost part in the cylindrical body 40. For this reason, the impact and friction on each glass piece are large, which is considered to be one of the strongest peeling conditions.

At this time, the glass piece falling in the cylindrical body 40 is exposed at the position where the glass piece was carried away by the large stirring blade 46 at the bottom of the cylindrical body, that is, the iron plate on the inner peripheral surface of the cylindrical body 40 was exposed. As a result, the glass pieces that directly hit the iron plate increase, and their wear increases. As a result, the particle size 1
The yield, which is the percentage of large pieces of glass that can be reused by at least mm, is low.

In order to improve the yield, in order to prevent the falling glass piece from directly hitting the iron plate at the bottom, it is necessary to use a cylindrical body.
Increasing the amount of glass pieces to be thrown into 40, reducing the rotation speed of the cylindrical body 40 to delay the falling time, and reducing the number of large stirring blades 46 to reduce the number of glass pieces lifted by one large stirring blade 46 It is conceivable to reduce the amount. In this way, the glass piece can be in a state of waiting at the bottom, and the impact on the dropped glass piece is reduced. However, if the conditions are changed in this way, other conditions such as the peeling quality of the coating film and the processing ability also change,
It is necessary to calculate and select all situations.

Next, a second embodiment will be described.

In the second embodiment, the height of the large stirring blade 46 is set to 6
0 mm. Other conditions were the same as in Example 1. As a result, all the peeling qualities of the coating film passed the limit sample. However, the absolute value of the peeling quality was inferior to that of Example 1. In addition, the residual ratio of large pieces of glass having a reusable particle size of 1 mm or more was 95.2%, which was better than that of Example 1.

These results indicate that the height of the large stirring blades 46 is lower than that of the first embodiment, so that the glass pieces overflowing from the large stirring blades 46 while being lifted by the large stirring blades 46 increase. This is due to the reduced amount of glass fragments falling from high places. That is, the impact on the glass piece was smaller than that in Example 1.

The number of the large stirring blades 46 is set to eight, which is the same as that of the first embodiment.
By lowering the height, the frictional force can be increased instead of reducing the impact force on the glass piece. Therefore, a combination of these may be selected as necessary.

The metal parts such as the panel pins 21 and the anode terminals 22 are first partially released by the crusher 44,
What was at the end of the glass piece was separated by the impact of the process of passing through the cylindrical body 40, and the recovery rate was 21% for the panel pin 21 and 72% for the anode terminal. The metal part is collected by the electromagnet 59, but if a large glass piece adheres to the metal part, the metal part cannot be lifted well by the electromagnet 59. This recovery rate is also greatly affected by the way the glass bulb 11 is crushed. That is, when a small piece is crushed with a strong force, the metal component is easily separated, so that the recovery rate is improved, but the yield of the reusable glass piece is reduced.

The reason why the collection rate of the panel pin 21 is lower than that of the anode terminal is that the anode terminal 22 is easily released because the glass in the portion where the anode terminal 22 is sealed is thin, but the panel pin 21 is sealed. This is because the portion where the glass is thick is so large that the panel pins 21 are unlikely to be separated from the glass piece.

The glass piece having the metal parts attached thereto is crushed by a crusher 44.
It is efficient to re-process the remaining parts by re-inputting them, or to crush them by another dedicated crusher and then input them to the hopper 43 for re-processing. For this purpose, for example, a glass piece to which a metal component is attached is automatically detected and selected by utilizing the dielectric property, and after being conveyed by a belt conveyor and crushed by a crusher, it may be automatically re-entered into the hopper 43. .

It is also conceivable to manually sort out the glass pieces to which the metal parts are attached. In this case, since the glass pieces have already passed through the cylinder 40 once, the sharp corners are completely removed. It is easy for workers, easy to handle and secures safety, and also improves work efficiency.

Next, a third embodiment will be described.

In the third embodiment, the funnel 14 is processed. That is, a glass bulb of a 15-inch color CRT
11 is cut into a panel at a position 10 mm away from the frit glass 15, the deflection yoke is removed, and the neck tube 23 is cut to remove the electron gun 27. The configuration and conditions of the apparatus were the same as those in Example 1 for this collection processing target.

As a result, the inner doug 24 and the outer doug
25, the peeling quality of the coating film such as anode silicon 26 all passed the limit sample. However, Inner Dag 24 was just barely at the limit.

When evaluated in conjunction with the results of Example 1, it was found that, in the method of the present invention, the inner dough 24 was the most difficult to peel off among the coating films of the color CRT. This is because the adhesion of the inner doug 24 to the glass is large, and fine irregularities are formed on the inner surface of the funnel 14, and the inner doug 24 that has entered the recess is hard to receive impact or friction, so it adheres. It is due to remain.

The presence of small-particle glass is effective for easily applying an impact or friction to the concave portion to peel off and remove the inner doug 24. Therefore, the glass particles having a particle diameter of less than 1 mm obtained in the fine particle separation section 40b of this apparatus are re-introduced from the hopper 43, so that the amount of the inner tag 24 peeled off can be increased. It is also effective to mix a glass piece with a polishing material harmless to glass production, for example, a polishing material made of silicon oxide which is also a main component of glass, instead of glass particles having a particle diameter of less than 1 mm. It is.

In this Example 3, the remaining rate of glass pieces having a particle size of 1 mm or more that can be reused was 92.4%.

Next, a fourth embodiment will be described.

In Example 4, the object to be collected was 14 funnels of a 15-inch color cathode ray tube, and the apparatus configuration and conditions were the same as in Example 2.

As a result, the peeling quality of the coating film such as the outer doug 25 and the anode silicon 26 passed the limit sample, but the inner dug 24 failed the limit sample. This is because the height of the large stirring blades 46 was lower than that of the third embodiment, so that the amount of glass fragments overflowing from the large stirring blades 46 increased during the lifting by the large stirring blades 46, and the amount of glass fragments falling from a high place was increased. Due to a decrease. That is, since the impact and friction on the glass piece were smaller than those in the third embodiment, the effect of treating the inner doug 24, which is difficult to peel off, was insufficient.

In Example 4, the residual rate of glass pieces having a particle size of 1 mm or more that can be reused was 95.8%, which was better than Example 3.

Next, a fifth embodiment will be described.

In the fifth embodiment, the inclination angle of the cylinder 40 is 2 °.
And the processing time was 20 minutes. Other conditions are the same as in the fourth embodiment.

As a result, the inner doug 24 and the outer doug
25. The peeling qualities of the coating films such as the anode silicon insulating film 26 all passed the limit sample. The reason why the inner tag 24 was improved from that of the embodiment 4 is that the processing time was doubled to 20 minutes, and the amount of the glass fine particles increased due to the increase in the processing time, and the inner tag which entered the concave portion of the funnel 14 was improved. This is because it effectively functioned in peeling 24.

In Example 5, the reusable particle size was 1 m
The residual ratio of large glass pieces of m or more was 92.6%.

Further, a sixth embodiment will be described.

In the sixth embodiment, the mounting angle γ of the large stirring blade 46 is set to 90 °. Other conditions are the same as those of the fifth embodiment.

As a result, the inner doug 24, the outer doug
25, the peeling quality of the coating film such as anode silicon 26 all passed the limit sample. The reason why the inner doug 24 is improved over the embodiment 4 is that the angle γ of the large stirring blade 46 is 90 °.
°, when lifting the glass piece by the large stirring blade 46,
This is because the time of falling from the large stirring blade 46 is hastened.

That is, since the farthest drop point is advanced from the point of 6:30 in Example 4 to the point of 5:30, the fallen glass piece does not directly hit the iron plate of the cylinder 40, and the Although the impact was reduced, another piece of glass was waiting at the drop point, and the two could collide with each other to remove the coating film, thereby increasing the efficiency.

In Example 6, the reusable particle size was 1 m
The residual ratio of large glass pieces of m or more was 96.8%.

Here, the end of the glass piece immediately after being put into the cylindrical body 40 has an acute angle, so that the end is easily damaged. Also,
The cracks generated at the ends advance into the inside of the glass piece to divide the glass piece into small pieces, and new sharp corners are formed, so that the wear is further promoted. As a result, the yield of glass pieces decreases.

In order to improve such waste, it is preferable to combine different types of large stirring blades 46 in a stepwise manner. For example, when the angle of the large stirring blade 46 is set to be large and the number is increased and the number of the large stirring blades 46 is increased with respect to the glass piece in the initial stage of the introduction, the impact force is reduced and the removal of the acute angle portion is emphasized. Thereafter, in order to increase the efficiency of peeling and removing the coated material, the large stirring blade 46 set under the condition where a large impact occurs may be provided. That is, large stirring blades 46 having different conditions may be provided stepwise along the longitudinal direction in the stirring section 40a.

Next, a seventh embodiment will be described.

In Example 7, the height of the large stirring blade 46 was set to 1
00 mm. Other conditions are the same as in the sixth embodiment.

As a result, the inner doug 24 and the outer doug
25, the peeling quality of the coating film such as anode silicon 26 all passed the limit sample.

In Example 7, the reusable particle size was 1 m
The residual ratio of large glass pieces of m or more was 96.1%.

Next, an eighth embodiment will be described.

Embodiments 1 to 7 show the receiving portion 44b of the crusher 44.
The size of the crushed glass was set to 80 mm square and the size of the crushed glass was reduced to approximately 100 mm or less. Hopper with the following
Introduced from 43. Other conditions are the same as in the seventh embodiment.

As a result, inner doug 24, outer doug
25, the peeling quality of the coating film such as anode silicon 26 all passed the limit sample.

In Example 8, the reusable particle size was 1 m
The residual ratio of large glass pieces of m or more was 94.2%.

The recovery rate of the anode terminal 22 was 100%. While the recovery of Example 1 was 72%,
The reason why the recovery rate of the anode terminal 22 was increased to 100% in Example 8 was because the breaking rate of the anode terminal 22 was increased because the glass piece was crushed by the crusher 44.

[0095]

According to the present invention, when glass is recovered from the cathode ray tube and reused, the glass piece containing the crushed glass piece is rotated to lift the glass piece with the stirring blade in the cylinder body. Since the glass pieces are dropped, the glass pieces collide with each other, and the coating material provided on the inner and outer surfaces of the glass bulb can be efficiently peeled and removed with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a front view showing a cathode ray tube glass collecting apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA shown in FIG.

FIG. 3 is a sectional view taken along the line BB shown in FIG.

FIG. 4 is an enlarged view of a main part of FIG. 3;

FIG. 5 is a front view showing the sorter in FIG. 1;

FIG. 6 is a sectional view taken along the line CC shown in FIG.

FIG. 7 is a partially sectional front view showing the structure of a general cathode ray tube.

FIG. 8 is a front view showing a conventional example.

FIG. 9 is a front view showing another conventional example.

[Explanation of symbols]

 11 Glass bulb 32 Glass piece 40 Cylinder 46 Large stirring blade 50 Mesh filter 54 Fine particle sorter 59 Electromagnet

Claims (8)

[Claims] 1. A glass piece obtained by crushing a glass bulb of a cathode ray tube is placed in a cylinder having a stirring blade, and the cylinder is rotated, and the glass piece is lifted and dropped by the stirring blade to apply the glass piece. A method for collecting cathode ray tube glass, comprising removing and removing an object. 2. The method for collecting cathode ray tube glass according to claim 1, wherein fine particles containing exfoliated matter are separated and removed by a mesh filter. 3. The method for recovering cathode ray tube glass according to claim 1, wherein the metal component is separated and removed by an electromagnet. 4. The method according to claim 1, wherein the fine glass pieces are re-introduced into the cylindrical body to improve the efficiency of removing the coated material.
4. The method for recovering a cathode ray tube glass according to any one of claims 3 to 3. 5. A tubular body into which a glass piece obtained by crushing a glass bulb is inserted and driven to rotate, and the glass piece is lifted and dropped by the rotation of the tubular body to peel off the applied material. An apparatus for collecting cathode ray tube glass, comprising: a stirring blade to be removed. 6. The apparatus for collecting cathode ray tube glass according to claim 5, further comprising a mesh filter for separating and removing fine particles containing exfoliated matter. 7. The cathode ray tube glass collecting device according to claim 6, further comprising a sorter for sorting the fine particle glass to be re-entered into the cylinder from the fine particles separated and removed by the mesh filter. 8. The cathode ray tube glass recovery apparatus according to claim 5, further comprising an electromagnet for separating and removing the metal component.