KR20040078976A - a method for selection and crushing/fine crush of wastes construction - Google Patents

Abstract

PURPOSE: Provided is a method for crushing and sorting out construction waste which separates foreign matters from the construction waste and provides sands, gravels and fine powder of good quality. CONSTITUTION: The method comprises steps of (a) sorting out foreign matters in raw materials of construction waste through a magnetic sorter, a gravitational sorter and a particle size sorter; (b) crushing the foreign matters sorted construction waste through many crushers into a certain particle size; (c) washing the crushed aggregate with a washing means; and (d) sorting out the washed aggregate according to their particle size on a multi-stage vibrating screen.

Description

{A method for selection and crushing / fine crush of wastes construction}

The present invention relates to a method for crushing and crushing construction wastes, and more particularly, selecting a foreign matter separating the foreign matter in the raw material; Shredding the construction waste, in which foreign matters have been selected, to have a predetermined particle size or less; Washing the aggregate that is crushed to a certain granularity; and, as a step of screening the aggregate to be cleaned by particle size, the method of crushing / crushing and sorting of construction waste to separate and recycle the high-quality aggregate and sand and fines from the construction waste It is about.

In general, construction wastes are caused by aging and reconstruction of civil engineering or buildings, deterioration of buildings, etc., and construction wastes generated at the time of dismantling of structures include foreign substances in natural soils and the like.

In addition, the construction waste is generally composed of inorganic materials, harmless to the human body, and can be sufficiently recycled. In the meantime, the quality of the bonding force is degraded due to the cement component during the regeneration, and most of the construction waste, cover, landfill, etc. It is used for ground formation.

The treatment device for construction waste treatment and extraction and input aggregate for recycling such waste is disclosed in Utility Model Registration No. 276764.

That is, the configuration is, as shown in Figure 1, a hopper equipped with a feeder so that each of the recycled aggregate or the collected construction waste that has undergone the crushing process can be put;

A vibrating sorting means connected to the hopper and the conveyor belt and sorting the metal included in the waste and aggregates into a predetermined size;

Aggregate sorted by more than 25mm in the sorting means is discharged to the conveyor, the aggregate less than 5mm is made of a configuration comprising a classifier is installed to enable sand discharge.

However, the processing equipment for the construction waste treatment and extraction and input aggregate as described above, is a device for sorting only sand below a certain granularity, the work process is increased in an iterative process to maintain the particle size, attached to the aggregate It is difficult to completely remove the cement component has a problem that the regeneration efficiency is lowered.

An object of the present invention for solving the above problems is to minimize the scattering of dust generated in the process of treating waste concrete, waste ascon, construction waste materials, construction waste, mixed waste, etc. Prevent contamination beforehand.

In addition, to completely separate the foreign matter mixed in the aggregate to prevent the degradation of the strength generated during recycling of the aggregate, and to sort the aggregates, sand and fine powder having various particle size among the waste building materials by one process, The present invention provides a method of crushing / crushing and sorting construction waste to obtain high-quality aggregate close to natural aggregate.

1 is a flow chart of a processing apparatus for conventional construction waste treatment, extraction and input aggregate.

Figure 2 is a flow chart showing the operation state of the construction waste wave / crushing and sorting method according to the present invention.

In order to achieve the above object, the present invention comprises the steps of separating the foreign matter separating the foreign material in the raw material;

Shredding the construction waste, in which foreign matters have been selected, to have a predetermined particle size or less;

Washing the aggregate that is crushed to a certain granularity; and

Provided are a method of crushing / crushing and screening construction waste comprising the step of separately screening aggregates to be washed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the present invention mainly uses waste concrete as a raw material, and magnetic separation process by magnet and water or wind to separate foreign substances such as reinforcing bars, styrofoam, vinyl, and wood. By using this method, only a plurality of waste concrete having a certain particle size are selected through the specific gravity selection process by the specific gravity difference and the particle selection process by the vibrating screen.

Subsequently, the waste concrete selected in the sorting process is crushed, and the work is carried out as a hopper into which construction waste (construction waste in which foreign substances, etc. are mixed in waste concrete, etc.) is introduced as a main raw material and a conveyor for supplying the same. Let it shrink.

A jaw crusher is first installed to crush the raw material introduced into the conveyor to a size of 200 mm or less, and a cone crusher is installed to crush a size of 25 mm or less on a line connected to the jaw crusher.

In the crushing process as described above, fine particles generated at the time of aggregate and pulverization having a certain particle size are generated, and the aggregates and fine powder selected as described above are washed to pass through the washing means to wash cement particles contained in concrete. do.

The washing means includes a water tank, a plate-shaped screen having one end inserted into the inside of the water tank and the other end installed to be inclined to be exposed to air, and having a plurality of through holes and a plurality of irregularities formed thereon, and a vibrator for vibrating the screen. And a nozzle installed to spray water at a high pressure from the top of the vibrating screen.

In addition, the washing means is formed as a cylindrical screen and a vibrator for vibrating the screen while being installed so as to be partially deposited in the tank and its inside.

Aggregates to be washed as described above, discharged while going through a multi-stage vibrating screen having a discharge hole of a certain particle size while having a constant height difference to the aggregate to be washed, and also stored by the particle through a conveyor installed below.

On the other hand, the particles of the initial stage that does not go through the water treatment process is filled with water is gravity sedimented by the collecting hopper tapered on the bottom is to be collected.

Referring to the operation of the present invention made of the above configuration as follows.

As shown in Fig. 2, waste concrete is mainly used as a raw material, and the specific gravity difference is used by using magnetic force selection process by magnet and water or wind to separate foreign substances such as reinforcing bar, styrofoam, vinyl, and wood. Only a plurality of waste concrete having a certain particle size are selected through a process of sequentially performing a specific gravity selection process and a particle selection process using a vibrating screen.

In addition, the magnetic separation, the magnet is installed in the roller that rotates the conveyor when the conveyor for transporting the raw material is rotated at a constant speed, the magnetic material by the rotational force when the conveyor rotates at a short distance, the nonmagnetic material is a principle of falling in the distance Metals contained in the concrete are separated.

At this time, the air blower is installed on the flow path in which the concrete falls to separate the material having a light specific gravity from the concrete.

When the above process is completed, the concrete is dropped on the conveyor to be transported in the water, the water tank is installed in the tank to filter the foreign matter floating on the water surface.

And, as described above, the foreign material is removed, the concrete is introduced into the hopper on the crusher through the conveyor, the crushing process is to move gradually as a conveyor while passing through a number of crushers to gradually reduce the particle size.

In detail, the raw material introduced into the hopper is first crushed to a size of 200 mm or less by a jaw crusher, and then crushed to a size of 25 mm or less by a connected crusher.

In the crushing process as described above, fine particles generated at the time of aggregate and pulverization having a certain particle size are generated, and the aggregates and fine powder selected as described above are washed to pass through the washing means to wash cement particles contained in concrete. do.

The operation of the washing means, when the crushed concrete is introduced into the tank through a conveyor connected to the crusher, one end is settled inside the tank while the other end is loaded on the screen inclined so as to be exposed to the ground.

In this case, the screen is vibrated to form a plurality of through-holes to allow the initial removal of the cement particles from the lump of concrete that is sufficiently called water.

As the conveyor is exposed to the ground, the cement particles of the concrete compact are secondly washed by the spraying pressure sprayed from the high pressure nozzle installed on the upper side of the conveyor, thereby leaving a lot of pure base material and aggregates. Allow it to fall through the through hole.

In addition, the operation of the other washing means, when the crushed concrete is introduced into the water tank through a conveyor connected to the crusher is installed in the horizontal direction inside the water tank and one side is rotated in the screen to settle in water, such as cement The screen is displaced and the screen is rotated while colliding with each other the concrete mass in a state of being continuously deposited in water to perform the operation efficiently.

Aggregate to be washed as described above, is put into a multi-stage vibrating screen having a discharge hole of a certain particle size while having a constant height difference is discharged to the conveyor from the screen, and discharged by the particle size through the discharge hole formed in the screen Particles are also stored in the yard as conveyors respectively installed on the bottom of the screen to correspond to the screen.

On the other hand, the fine powder discharged in the initial crushing step that does not go through the water treatment process as described above is put into the collecting hopper having a tapered shape of the lower portion is gravity settled in the water filled therein to be collected.

With the above configuration, as well as completely remove the foreign matter contained in the waste concrete to prevent the bond strength is lowered when reused by the cement component contained in the waste concrete.

According to the present invention as described above, to prevent the environmental pollution by preventing the dust generated in the process of sorting the waste concrete, waste ascon, building waste materials, construction waste, mixed waste and the like to the air.

In addition, to completely separate the foreign matter mixed in the aggregate to prevent the strength degradation caused when the aggregate is recycled, to recycle the aggregate in the waste building materials, and to sort by one process of aggregate having a different particle size In order to obtain high quality aggregate close to natural aggregate.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the invention as provided by the following claims. I would like to clarify that those who have knowledge of this can easily know.

Claims (4)

Selecting foreign substances in the raw material through magnetic screening, specific gravity screening, and particle size screening; Shredding the construction waste, in which foreign matter is selected, through a plurality of crushers sequentially installed below a predetermined particle size; Washing the aggregate crushed to a predetermined particle size through a washing means; and Separation and sorting method of the construction waste comprising the step of sorting the granularity on the multi-stage vibrating screen having a predetermined height while sequentially installing the aggregate to be washed. According to claim 1, The washing means, the first washing the concrete in the tank, the second washing by the injection pressure of the nozzle is injected while exposed to the ground through the tank, the screen of the screen when moving in the tank A method of crushing / crushing and sorting construction waste, characterized in that the secondary washing process is made by vibration. According to claim 1, wherein the washing means, the first washing process for washing the concrete while dropping in the tank, the second washing to rotate while washing by putting the inside of the rotating cylindrical screen with the part settled in the tank Method for crushing / grinding and sorting of construction waste, characterized in that the process is made. The method of claim 1, wherein the fine powder discharged from the crushing step without undergoing the water treatment process is gravity sedimented and collected by a collecting hopper having a tapered shape at the bottom while the water is filled. Method for crushing / grinding and sorting of construction waste, characterized in that made.