JPS5942050A - Device for sorting and regenerating aggregate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for classifying, recovering and recycling aggregate from concrete scraps generated at a demolition site.

Concrete waste generated at demolition sites has conventionally been used in landfills, and the aggregates have hardly been recovered or recycled.

However, in recent years, there has been a call for recycling of concrete waste materials. In Japan, there will be many concrete buildings that will reach the end of their useful life in the near future, and it is predicted that there will be a large increase in concrete construction costs. therefore,
Collecting and recycling aggregate from a single concrete blast is a major challenge.

Recovery of aggregate from concrete waste, -1ij, requires the development of a system and the equipment used in the system.

Systems for collecting and recycling concrete waste are well known, but it is necessary to collect and recycle concrete waste before applying it to the recycling system.
It is necessary to pre-process up to

Therefore, the masonry concrete is divided into large blocks and small blocks, the large blocks are crushed into small blocks, the reinforcing bars are removed, and the crushed blocks are merged with the small blocks to be used for making earth, sand, wood, cloth, etc. After removing foreign matter such as, it is further crushed and made into reinforcing steel! After removal, a concrete building with a thickness of 150 mm or less is placed on top of which 40 mm of the selected earth and sand is added.
A pretreatment system has been proposed in which the raw material concrete mass is obtained by adding the above-mentioned small lumps.

The raw material concrete mass obtained in this way contains only a small amount of concrete material, so that one stem is only one ild.

As a system for obtaining raw aggregate from the above raw material concrete 1.1.), the raw material concrete is crushed to remove the remaining reinforcing bars, and then it is meshed to a ti of 10 mm or less.
Divide into coarse grains of 10 mm to 40 mm and 2 large grains of 40 mm or more, and crush the coarse grains with 4 + 'h' + twins and put them on a screen.
5mm bone recovered and sifted through a screen
A method has already been proposed in which the following 3 HI particles are combined with the 1 jjl particle and subjected to the apparatus of the present invention, and the large particles are returned to the raw concrete mass and crushed to a fine degree. ：、、、
The object of the invention is to provide a system as described above with a 10 mm
The following; 2i4+ by crushing 1i11 grains to at least 5mm or less! 4I provides a device that classifies fine particles and effectively removes fine particles.

Hereinafter, n2 will be explained in detail with reference to figures.

lQrom Recovered concrete building M crushed below
, ml is applied to sheet 1. The sheet 11 is also supplied with large-grain recovered aggregate λ (2) returned from the wind classifier described later. A plate 2 that rotates horizontally facing the sheet 1 is provided, A discharge blade 3 is provided in a radial shape on the upper surface.

The adult body 2 is rotated by the motor 7 shown through the support 4.
'V2ru.

A collision plate 5 is provided at the end of the discharge blade 3 facing toward the front side, and the impact plate 5 is formed into a cylinder in the shape of an arc or 1 in the upper part. For this reason, the emitted collected H material collides with the projecting plate 5 at one place and is then reflected downward, l'1.
Ru. /-Ito 1. Plate 2. Cage 6 surrounding the collision plate for 5 minutes
is provided, and the lower end of the casing 6 becomes seams 1 and 7 of recovered bone tissue after two collisions with the collision plate 5, and the duct 9 of the dust collector 8 opens inside the dust casing 6 to collect fine powder. A suction port 10 is provided.

The door faces the transport path 11, and the door faces the transport path 1.
1 is in communication with the hopper 13 of the wind classifier 12.

The wind classifier 12 is composed of a power distribution section 14, a fine powder collection duct section 15, and a collection cap section 16.

The supply section 16 includes a hopper 13, a partition 17 at the lower end of the tank,
It consists of a vibration feeder 18 provided below the partition 17 and a ventilation port 19 provided on the right side of the figure. The fine powder collection duct part 15 opens above the body part 14 on the one hand, and the duct 9 of the east dust beach 8 on the other hand.
It is open to The body 14 has two seams 120 below.
, 21 are provided, and a switching damper 22 is provided on the sheet 20 on the side closer to the vibrating feeder 18. A partition plate 24 is provided upright at the bottom 24 of the body 14 between the sheets 20 and 21. has been done. Previous^Self shoot 2
2 seas facing the lower end of 0) 25 +' 26
is provided, and the damper 22 causes the shaft 20 to
is connected to one or both of the sheets 25 and 26.The sheet 25 is returned to the sheets 5 and 1 via the conveyance path 27, and the recovered bones 11A'M2 are supplied to the sheet 1. Become something to do.

As mentioned above, the body portion 14 of the wind classifier 12 is A.

It is divided into three parts, B and C, and a fine powder part, and in the example shown in the figure, it can be classified into a maximum of four classes.

The function of the above-mentioned guest 1d will be explained below.
J (supplied), is discharged in the half direction by the discharge blade 3 of the plate body 2, and collides with the penile plate 5 to be crushed.The fine powder generated at this time passes through the suction port 10 and nine ducts. The collected wild wood grains are collected to the kajinshin 8. Most of the crushed wild wood grains are less than 5 mrn and are supplied to the hopper 13 via the sea door 9, the conveyance path 11. Hopper 13
The recovered aggregate grains in the container contain some fine powder and have a particle size of 4. The recovered aggregate particles travel down the partition 17, hit the vibrating feeder 18, and are bounced off by the air flow from the ventilation opening 19, which arranges them in the order of particle size A, B, O, and D.
I can go far away. An example of each grain in this case is:
A, B=1.2~5 mm C=0.15~1.2
mm D == 0.15 mm or less.

The recovered aggregate grains dropped by 1 and '4 in parts A and B are damper 2.
2 all r sheets 25 or sheets 1 and 26
It can also be supplied to <A?> as shown in the figure. ′ii≦
It is also possible to give the portion of the portion to the node 25 and the portion of the portion B to the sheet 1 and 26.

The damper 22 has a large amount of debris in the collected aggregate particles in parts A and B.
Ijl! In addition to returning the base to which powder is attached to the crusher,
By repeatedly applying it to the crusher, a large amount of fine sand i'f 'IsJ of small particle size, which is classified as part C, can be recovered. In other words, it is possible to increase the proportion of aggregate with small particle size in the recovered, M-generated, and J-recovery.

As shown in Part 2, according to the present invention, the number of iJ
j' Raw aggregate, total aggregate j can be obtained by a simple process, and the particle size lZ'4 of the recycled aggregate can be easily changed.

[Brief explanation of the drawing]

Claims (1)

[Claims] A crushing device for recovered aggregate, an air classifier that classifies the recovered aggregate discharged from the crusher into a predetermined particle size, and a dust collector that sucks fine powder in the crushing device # and the wind classifier. , a switching device for returning the collected large particles classified by the wind classifier to the crusher.