KR200324913Y1 - Dry type sand producing apparatus system - Google Patents

Abstract

The present invention relates to a device for producing sand without pollution by a dry production method of a certain size aggregate produced by crushing processed aggregate (crushed stone) or waste concrete. Currently, most domestic sand producers produce wet production method. Due to this, environmental pollution such as water pollution and soil pollution is serious, and equipment companies also invest in expensive facilities required for water pollution prevention and huge waste (sludge) disposal costs in the water treatment process. Has become a major cause of deterioration in profitability. The dry production method of the present invention allows the whole work process to be carried out in a closed state without installing a separate dust removing device where dust is generated between processes, and in the final process, the sand and fine powder are separated at once by an air classifier. Its purpose is to drastically reduce facility and production costs while preventing pollution, and to achieve this purpose, the primary crushed aggregates crushed from the crushing plant are transferred to the dump hopper. After input, the crushed material that is crushed, sorted, conveyed, and conveyed by the feeder, the dividing machine, the vibrating screen, and the conveyor into the sand and fine powder in a sealed air separator. It relates to a dry sand production apparatus using an air classifier, characterized in that the separation.

Description

Dry sand production apparatus using air classifier {Dry type sand producing apparatus system}

The present invention relates to a device for producing sand without pollution in a dry production method using an air classifier of a predetermined size aggregate generated by crushing the processed aggregate (crushed stone) or waste concrete.

Naturally produced aggregates and sands have limited harvesting capacity, making it difficult to meet demand, and seaweeds may be used to replace scarce aggregates or sands. Its strength is lowered and the cost is increased by collecting from a long distance and the natural environment is damaged. Therefore, the situation is dependent on imported aggregates to compensate for the lack of aggregates.

In order to solve the shortage of aggregates, a method of producing artificial sand by crushing and selecting processed aggregates or waste concrete generated from quarries as raw materials has appeared. Currently, most sand producing facilities use water to crush, sort, and treat water. As a wet type process is produced, the cost of expensive equipment investment and treatment is increased, and dust generated during sand production is washed in a large amount of water, resulting in water pollution. The cost of production increased due to the need to install facilities. For example, Korean Utility Model Registration No. 20-0303298 (recycled sand production equipment using construction waste) forms a water film on selected stone powder (sand) after crushing to produce sand without fine powder or foreign matter. The technology for discharging the waste and sludge from the water tank to each conveyor is described as a second washing while moving it to a screw conveyor installed in the water tank. It caused pollution.

In order to solve the problem of wet sand production, Korean Utility Model Publication No. 20-0308843 (system construction apparatus for crushed sand production) occurs in the process of producing sand by crushing the raw stone as shown in FIG. The dust suction chute (70), the corrugated pipe (80) (81) and the cyclone (90) are installed in each crusher and sorter that generate a lot of dust without wet or foreign matters to be wet-washed or washed in water. Although a device for removing the gas has been disclosed, there is a problem in that profits are deteriorated due to an increase in facility cost and production cost because a separate complex dust removal facility must be provided for each device that generates dust.

The present invention is to solve the problems as described above to avoid the conventional wet sand production method, in order to suppress dust generation in the dry sand production process wherever dust is generated without a separate dust removal device is sealed Its purpose is to reduce the cost of facilities and production while preventing environmental pollution by separating the sand and fine powder at the same time with the air separator in the final process.

In order to achieve this purpose, the raw feed or waste concrete crushed at the crushing plant (crushing plant) is put into the dump hopper, and then the feeder with the entire process closed. ), And the sand containing fine powder is separated into sand and fine powder by air separator in the air separator, by crusher, vibrating screen and conveyor. There is a feature of the present invention.

1 is a flow chart of a dry sand production system according to the present invention

2 is a block diagram of a dry sand production system according to the present invention

3 is a schematic view of an air classifier of the present invention

4 is a block diagram of a conventional dry sand production apparatus

<Description of Symbols for Main Parts of Drawings>

1. Storage Hopper 2. Feed Feeder

3. Diffuser 4. Vibration Separator

5. Air Classifier 6. Vibrating Screen System

7a, 7b, 7c, 7d transport conveyor case

8a, 8b, 8c, 8d conveying conveyor

9. Separator case 10. Dispersion plate

11. Reducer 12. Variable speed motor

13. Inner cylinder 14. Sand discharge pipe

15. Fan Braid 16. Selectac Braid

17. External cylinder 18. Differential discharge pipe

19. Undistributed Bin

70. Dust suction chute 80, 81. Corrugated pipe

90. Cyclone

Referring to the dry sand production apparatus according to the present invention by the drawings as follows.

The primary processed aggregate is the size of the primary crushed waste concrete mass from the quarry quarry or construction waste treatment plant through the screen mesh of approximately 60mm in the crushing plant of the site, the present invention is the primary tank As a raw material for producing sand from the fine aggregate, as shown in Figs. 1 and 2, the raw hopper aggregate is transported and stored in a designated aggregate storage tank (dump hopper) 1, and this hopper The feeder (2) for supplying the first milling aggregate stored in (1) to the milling machine 3 by adjusting a predetermined amount in accordance with the shredding capacity of the milling machine 3, and the first milling aggregate Sand mixer (3) for crushing sand of the required size, vibrating screen (4) for sorting the crushed aggregates from the sander to the sand specification, and passing aggregate passed through the screen net are sand. Classifiers separating air and fine powders r) (5).

In the components of the present invention, the storage hopper (dump hopper) (1) is a device for storing the primary aggregate aggregate and discharged to the feed feeder (2) is accumulated a large amount of aggregates do not generate dust in the workplace However, a cover may be provided if necessary.

Feeder (2) is a device for supplying to the seasoning machine (3) by adjusting the amount of primary aggregate aggregate discharged from the storage hopper (1) and a vibrating feeder (vibration feeder) for vibrating and transporting aggregate There is an apron feeder that rotates and transports aggregates in an endless track type. These are all small ones installed directly under the outlet of the storage hopper (1). It is either closed or enclosed to prevent dust from spilling out.

The crusher 3 is a final crusher for crushing the primary crushed aggregate supplied from the feed feeder 2 into standard sand. The crusher type is applicable to the impact and the rotation by the rotational force of the rotor. An impact crusher of vertical or horizontal type that is crushed by a crushing action, a roller crusher that is crushed by impact and compression by rotating two rollers; Sand crusher (crushing) by compression and shearing by eccentric rotation of the spindle, and hammer crusher (crushing) by impact and grinding by the rotation of hammers (hammers) hanging on the spindle. They are operated in a retractable case so that the case is operated in a closed state when working, so that dust does not leak out. As such, the criteria for selecting various types of pottery are determined by the type and particle size of the input aggregate.

Vibrating screen (vibrating screen) (4) is a screen mesh size (mesh size) suitable for the crushed sand quality regulations (KS2527) when the sand crushed by the potter (3) is transported and put into the conveying conveyor (8b) It is selected and screened by vibrating screen mesh (6) installed inside. Sand passing through the 3-6 mm mesh is sent to the air classifier (5), and the oversized aggregate not passed through the conveying conveyor (8c) is to be sent back to the seasoning machine (3) to undergo a re-crushing process, the vibrating separator (4) is used such as an inclined screen (inclined vibrating screen), the upper part of the sorter so that dust does not flow to the outside It is intended to operate inside the sorter case (9) installed in.

The air separator 5 is an apparatus for separating sand and fine powder in a sealed case as shown in FIG. 3, and the aggregate passing through the vibrating separator 4 is transferred by the conveying conveyor 8d. When the raw material is introduced into the dispersion plate 10 is dropped into the dispersion plate 10 and scattered to the outside by the centrifugal force by the rotation of the dispersion plate 10 to rotate around the rotary shaft (11). At this time, the sand of the assembly having a large inertial force moves to the inner cylinder 13 and settles down by gravity and is discharged to the outside through the sand discharge pipe 14, and the fine grain having less inertia force The dust of) is moved to the outer cylinder 17 by centrifugal force or collision by the rising air generated by the fan blade 15 and the selector blade 16. The fine dust is conveyed to the dust collecting container 19 through the fine discharge pipe 18, whereby the air is classified and the sand is sent to the yard as a product, and the dust is contained in the sealed fine collecting container 19 to be removed. do.

Meanwhile, the transfer conveyors 8a, 8b, 8c, and 8d which connect the devices of the above processes to transport the aggregates are provided inside the transfer conveyor cases 7a, 7b, 7c and 7d, respectively. Or it is covered with a cover so that fine powder does not spill out.

Referring to the operation according to the present invention is as follows.

The raw concrete of the quarry or the waste concrete mass of the construction waste treatment plant is first crushed to the size of about 60mm through the mesh at the crushing plant, and put into the storage hopper (1) and stored and supplied to the feed feeder (2). The amount is adjusted and supplied according to the production volume of the cooking machine (3). According to the type and particle size of the input aggregate, the chopsticks (3) selected are impact crushers such as impact crushers.The crushers (3) are finally crushed to the size of the standard sand and sent to the vibrator (4). The screen of the screen is usually screened with a vibrating screen net (6) of about 3 to 6 mm, and the ones that do not pass through the vibrating screen net (6) are sent back to the machine (3) to be crushed and passed through the air. It is sent to the classifier (5) and separated into sand and dust, and the process from the storage hopper (1) to the air classifier (5) and the conveying conveyor (8a) (8b) (8c) (8d) The place where the fine powder is generated is covered or covered in a closed state, so that the work and conveyance are carried out so that no dust is generated outside the workplace and the fine powder contained in the sand is finally discharged from the air classifier (5). Separate and collect.

At this time, the air grinder 5 adjusts the rotation speed by the variable speed motor capable of converting the rotation speed, and the rotation of the dispersion plate 10 and the radial length adjustment of the fan blade 15 in the completely sealed case. And dispersing the powder by the generation of rising airflow and the centrifugal force of the selector braid 16, the performance is excellent and high classification effect can be obtained. Furthermore, the air flow inside the air classifier 5 itself is completely sealed. Therefore, dust does not occur because it does not go through the process of repeatedly screening in an open flat screen state like a conventional sorting machine. Therefore, a dust collector such as a blower, cyclone, or dust filter is installed wherever dust is generated. There is no need, and it is possible to produce sand without pollution by a simple process without being wet.

The present invention produces sand in a dry manner, which reduces the amount of investment in equipment and the area required for the production of sand, which is generally employed for sand production. Sludge and cake treatments generated by cleansing the wastes were also contaminated with the environment, so they worked in a dry sealed state and the sand and fines were collected and collected separately at the final stage. It is possible to increase profits by selling as a packing additive, and by repeatedly installing dust collecting equipment such as branch suction chute, corrugated pipe, and cyclone for each crusher and sorter where dust is generated in conventional dry sand production, it is complicated and expensive. Avoid the structure and work in a sealed state By sending groups of final classification process air at the same time separating the sand trap and the differential was able to simplify the process and reduce costs.

Claims (3)

In an apparatus for producing sand using raw aggregates or waste concrete as primary raw aggregates from Crassing Plant, a storage hopper 1 into which the primary aggregated aggregates are stored and discharged, and from the storage hopper 1 A closed feeder (2) for supplying the discharged primary crushed aggregate to the potter (3), a sealed potter (3) for crushing the primary processed aggregate into standard sand, and aggregates crushed in the potter Is composed of a hermetically sealed vibrating separator (4) for sorting with a vibrating screen net (6) according to the sand specification and a hermetic air classifier (5) for separating the standard sand passed through the vibrating separator (4) into sand and fine powder. Aggregate transfer is composed of transfer conveyors (8a) (8b) (8c) (8d) which are covered with a cover or provided inside the transfer cases (7a) (7b) (7c) (7d). Dry sand production apparatus using an air classifier, characterized in that not to be emitted to the outside. The method of claim 1, wherein the vibrating screen net (6) is a dry sand production apparatus using an air classifier, characterized in that the size of the screen mesh 3 ~ 6mm. The air classifier (5) according to claim 1, wherein the air classifier (5) has a distribution plate (10) for dispersing the raw material introduced in the sealed case to the outside by rotating, and creates an upward air flow to disperse the fine powder, For the purpose of simple adjustment, the air is characterized by being provided with a fan blade 15, which is lengthwise adjusted in the radial direction, a selector braid 16 which exerts a centrifugal force on the scattered fine powder, and a variable speed motor 12 capable of converting rotation speed Dry sand production equipment using a classifier.