JPS5851994Y2 - Processing and recycling equipment for waste materials mainly made of reinforced concrete - Google Patents

Description

[Detailed explanation of the invention] This invention crushes waste materials mainly made of reinforced concrete.
The present invention relates to a processing and recycling device that can extract the crushed concrete contained in the crushed material as a recycled product such as an aggregate substitute.

Sand and gravel are used as aggregates in reinforced concrete.
Today, it is often difficult to obtain due to various social restrictions, and its cost is also rising.

On the other hand, the actual situation is that there are often restrictions on where reinforced concrete waste materials, such as waste materials from dammed reinforced concrete buildings and unnecessary concrete piles, can be dumped.

Therefore, the present invention aims to provide a processing and recycling device that can crush waste materials mainly made of reinforced concrete as described above, and extract crushed concrete from the crushed materials as recycled products such as aggregate substitutes. The purpose is

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the device shown in the drawing, the parts related to the present invention include a hammer crusher 1 and a magnetic separator 2 installed according to the flow of crushed materials.
, screen 3, and moisture separator 4.

A caterpillar feeder 5 is attached to the supply side of the hammer crusher 1, and a vibration feeder 6 is attached to the discharge side thereof.

Supplying waste material mainly made of reinforced concrete into the hammer crusher 1 by the above-mentioned caterpillar feeder 5,
Crush this.

In the hammer crusher 1, the circumferential speed of the rotor and the gap between the grade bars are adjusted according to the required size and particle size distribution of the crushed material.

Waste materials that are mainly made of reinforced concrete include wood, asphalt concrete, unreinforced concrete, etc. in addition to reinforced concrete.

Conventionally known crushers include show crushers and cone crushers, but these crushers do not completely separate the reinforcing bars from the concrete, resulting in problems such as the reinforcing bars obstructing crushing or clogging at the outlet of the crusher. This phenomenon is likely to occur.

However, the hammer crusher 1 does not have such disadvantages and is most suitable for crushing waste materials mainly made of reinforced concrete.

Now, the primary crushed material a crushed in the hammer crusher 1 is discharged to the vibrating feeder 6 and sent to the next process by the conveyor 7.

The components of the above-mentioned primary crushed material a include small concrete lumps, powder of concrete, etc., metal, wood chips, and the like.

The metals mentioned above include magnetic materials such as reinforcing bars and non-magnetic materials such as aluminum, but these metals are more ductile than concrete and therefore cannot be crushed into small pieces.

A magnetic separator 2 is provided along the flow of the conveyor 7, and is configured to separate and remove magnetic materials from the primary crushed material a.

The remaining crushed material from which the magnetic material has been separated and removed, ie, the secondary crushed material, is supplied to the next screen 3.

This screen 3 is for removing crushed objects larger than a certain level from the secondary crushed objects.

As mentioned above, the non-magnetic metal remains in a much larger state than the concrete block, so the screen 3 can remove the non-magnetic metal, as well as relatively large pieces of wood etc. .

The mesh size of this screen 3 is set to, for example, 3Q mm.

The secondary crushed materials C remaining after relatively large crushed materials are separated and removed by the screen 3 are supplied to the next hydraulic separator 4.

This hydraulic separator 4 separates and removes wood chips, concrete powder, and other materials contained in the tertiary crushed material C that are not useful as recycled products such as aggregate substitutes, which is the purpose of the device of the present invention.

By providing the hydraulic separator 4 at this stage, instead of separating wood chips and concrete powder separately,
Since they can be separated at the same time, the processing and regeneration steps are simplified.

In addition, when a wind sorter is used instead of the hydraulic sorter 4, the separation accuracy is low, it is difficult to separate the powder and wood pieces at the same time, and there is also the disadvantage that the powder is scattered around. be.

The secondary crushed material d that remains after removing wood chips, powder, etc. as described above is taken out with a screw and left as is.
Although it may be used as an aggregate substitute, it is further conveyed to a screen 9 by a conveyor 8, for example, particles I of 30 to 10 mm, particles ■■ of 10 to 5 mm, particles II of less than 5 mm.
It is desirable to classify it as I.

In addition, the above-mentioned caterpillar feeder 5, vibration feeder 6,
The dust generated on the screens 3, 9, etc. is sucked into the cyclone 10 by the chain line in the figure, and the dust separated here is discharged downward and collected as appropriate, and the air containing fine dust that is not separated is transferred to the wet cyclone 10. The air is introduced into a dust collector 11 or a bag filter, where dust is completely removed, and the clean air is discharged by a blower 12.

In the figure, 13 indicates a water supply pump, and 14 indicates a settling tank.

Since the device of this invention is constructed as described above, by crushing waste materials such as reinforced concrete and separating the crushed materials through a certain process, it is possible to finally regenerate aggregate substitutes, etc. You can get the goods.

This aggregate substitute is not pure aggregate itself such as sand or gravel, but is mixed with or attached to concrete, so it cannot achieve the same performance as aggregate, but its performance is As shown in the test results in Table 1, it is only slightly inferior in water absorption performance compared to JIS standards, but otherwise fully satisfies the standards.

Therefore, since this aggregate substitute can be used in concrete products that do not require much strength, it is possible to solve the problem of obtaining aggregate and to effectively utilize reinforced concrete waste.

In addition, the device of this invention can efficiently separate the crushed materials from the first to the fourth by installing the hammer crusher, magnetic separator, screen, and hydraulic separator in order according to the flow of the crushed materials. By appropriately selecting the mesh size of the sieve, non-magnetic metals can be separated, and relatively large pieces of wood can also be removed using the same screen.

Therefore, in the next hydraulic separator, it is necessary to separate relatively small pieces of wood and powder, so that the load is reduced.

In addition, the hydraulic sorter can separate wood chips and powder at the same time, which greatly contributes to improving overall efficiency, and because the separation accuracy is good, the quality of the final recycled product is also good. There is an effect.

The above-mentioned recycled product can be used not only as an aggregate substitute for concrete, but also as a road base material, a material for replacing soft roadbeds, etc., and has a wide range of uses.

[Brief explanation of drawings]

The drawing is a flow sheet of the device of the present invention. 1...Hammer crusher, 2...Magnetic sorter, 3...Screen, 4...
Hydraulic sorter, a... Primary crushed material, b...
...secondary crushed material, C...tertiary crushed material, d.
...Fourth crushed material.

Claims (1)

[Scope of utility model registration request] A hammer crusher is installed to crush waste materials mainly made of reinforced concrete, and a magnetic separator is installed in the middle of the flow of the primary crushed material crushed by the hammer crusher, and a magnetic separator is installed in the middle of the flow of the secondary crushed material that has been magnetically sorted. A screen is installed at the top of the screen, and the screen removes crushed materials larger than a certain level to obtain tertiary crushed materials.A hydraulic separator is installed in the middle of the flow of the tertiary crushed materials to separate floating materials, and the remaining tertiary crushed materials are separated. A processing and recycling device for waste materials mainly made of reinforced concrete, which is characterized by extracting quaternary crushed materials as recycled products such as aggregate substitutes.