KR19990008946A - Sand production method - Google Patents

Abstract

The present invention relates to a method for easily and easily manufacturing sand using stone powder generated as a by-product of a crushed stone plant generated in the process of manufacturing gravel for construction and civil engineering. Summary of the present invention is to produce artificial sand through a transport step, a stone powder sorting step of separating the transported stone powder into fine powder and stone powder, and a stone powder processing step of sand crushing the selected stone powder, sand processing step, washing and sorting step.

Accordingly, it is possible to easily manufacture artificial sand having a constant particle size while removing segregation by using unnecessary stone powder generated as a by-product of the crushed stone, as well as fine powder powder generated during the production of artificial sand by means of a nozzle. It is easy to remove from each vibrating screen by water injection to improve the crushing efficiency of the crusher while preventing pollution of the surrounding environment, and to manufacture high quality artificial sand at low cost.

Description

Sand production method

The present invention relates to a method for producing sand using stone powder produced as a by-product from a crusher plant (CRUSHER PLANT) generated in the process of manufacturing the gravel and river stones of seoksan as a raw material for construction, civil gravel Through the stone powder transfer step of supplying the stone powder of the crushed stone plant, the stone powder separation step of separating the supplied stone powder and the sand processing step, the sand having a constant particle size can be artificially produced continuously and the crushing efficiency of the crusher is increased. The present invention relates to a method for manufacturing sand, which enables to manufacture artificial sand at low cost.

In general, crushed stone, which is a by-product generated in the process of producing gravel having a certain size by using a crusher for building civil engineering due to the lack of natural aggregate, has a large particle size. Without going through the process of filtering the crushed stone having a fine particle size by vibrating screen to produce artificial sand.

However, the artificial sand produced by the above method has a large amount of segregation, thereby degrading the value of sand used as a general mixture, and in addition, stone powder having a relatively large particle size except artificial sand should be disposed of. In relation to the pollution of the surrounding environment for the treatment of the stone powder, as well as the horn and inefficient disadvantages due to the input of personnel and equipment.

On the other hand, recently, in order to improve the above disadvantages, a method of artificially manufacturing sand using a centrifugal mill and a vibratory mill has been proposed.

That is, according to Korean Patent Laid-Open Publication No. 86-3850 and Korean Patent Publication No. 90-885, the step of crushing crushed stone, which is a material of sand, through a centrifugal mill, screening the crushed stone by vibrating screen, The remaining coarse stone is pulverized again by a vibratory grinder, and the sand having a constant particle size is produced while removing fine particles through the screen of the pulverized stone obtained by the vibratory grinder and also through the vibrating screen.

The sand production method as described above, vibrating screen of the raw material weight, the ratio of granules and the granular ratio of the raw material passed through the classifier, the raw material weight, the volume ratio, and the required granular ratio to the vibrating screen The characteristic value of the vibration mill and the characteristic value of the vibration mill are input to the computer through the control panel in advance, and the input and the input of each device during operation are compared. By controlling the input amount is to make artificial sand.

In this case, the sand can be continuously produced in a uniform state through the computer of the control panel, while in the centrifuge used for the production of the artificial sand, particles having a fine particle size are added together with stones, which are materials of sand. And lowers the crushing action of the stone, and the centrifugal crusher and the vibrating screen, etc., are always generated because of the impact force and vibration due to the impact of the crushing of the stone in the device itself. Frequently malfunctions occur, such that there was a lot of problems, such as unable to properly manufacture artificial sand having a certain particle size.

The present invention has been made in order to improve the various problems of the prior art as described above, the object is to remove the artificial sand having a constant particle size while removing segregation using unnecessary stone powder produced as a by-product of the crushed stone to produce civil gravel In addition to making it easy to manufacture continuously, fine powder powder generated during the manufacture of artificial sand is easily removed from the vibrating screen for each step by spraying water with a nozzle to prevent crushing efficiency of the crusher while preventing contamination of the surrounding environment. To improve, and to provide a method for producing sand that can produce high quality artificial sand at a low cost.

1 is a system diagram showing a method for producing sand according to the present invention.

Figure 2 is a schematic configuration diagram for explaining the particle shaping and crushing action of the sand of the impact crusher used in the sand production of the present invention.

Explanation of symbols for main parts of the drawings

11.FEED HOPPER

12,12 ', 12 ... VIBRATING FEEDER

13,18,30,30 '... vibration screen

14,14 '... Nozzle

15.JAW CRUSHER

16.STOCK PILE

17,19 ... CON CRUSHER

20,32 ... IMPACT CRUSHER

23.STOCK RING

31 ... Road Mill

33.Trusting tank

34 ... spiral classifier

The technical configuration of the present invention for achieving the above object, the stone powder transfer step of storing the stone powder generated in the crushed stone plant in the feed hopper to supply to the vibrating screen according to the line balance through the speed control of the vibration feeder,

A stone powder sorting step of separating and separating the stone powder transferred to the vibrating screen into a powder and fine powder (soil powder) having a constant particle size and granularity on the vibrating screen by spraying water with a nozzle;

Stone processing step to adjust the particle size of the stone to the desired size by adjusting the particle size of the stone to 250mm or less by adjusting the exit gap by rotating the main speed to 150-300rpm by rotating the separated powder into the jaw crusher. Wow,

After the stone powder crushed through the jaw crusher is stored in the stock pile (STOCK PILE) and stored in the stock pile (STOCK PILE), a predetermined amount is added to the primary cone crusher through a vibrating feeder to perform the intermediate grinding, the stone grinding is completed intermediate grinding Through the addition of more than 10mm grains, except for the grain size, into the secondary cone crusher, the grinding work is performed. Sand processing step of separating the stone powder of less than 10mm by transferring to the vibrating screen after improving the granule shape of the stone powder,

The stone powder classified by the vibrating screen is deposited on the stone powder stock pile, and then transferred to the vibratory feeder to classify sand of 2.5-5 mm or less from the vibrating screen by spraying water by the nozzle, and the more fine powder is rotated by the rotary roll. First, the sand is separated from the vibrating screen through a load mill that compresses and crushes the fine powder. The fine powder of 2.5-5mm or more is put into the impact crusher for shaping the particles, and then crushed together with the shaping of the particles. A sand washing and sorting step of sending sand back to sort the sand;

Sand is produced by the sand dewatering step of classifying the sand of 2.5-5mm or less classified by the vibrating screen together with water into a spiral classifier and classifying it into fine powder of 0.15mm or less and more sand. to be.

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

1 is a schematic diagram showing a method for producing sand according to the present invention, Figure 2 is a schematic configuration diagram for explaining the grain shaping and crushing action of the sand of the impact crusher used in the sand production of the present invention, the present invention is crushed stone The artificial sand is produced through the stone conveyance step of transporting the plant, the stone fractionation step of separating the transported stone powder into fine powder and soy flour, and the stone processing step of intermediate crushing the selected stone powder, sand processing step, washing and sorting step. .

High-quality stone powder generated from crushed plants such as blasting sandstone and river stone is stored in the feed hopper 11, and the stone powder stored therein is adjusted to the line balance according to sand production by adjusting the speed of the vibration feeder 12. Is supplied to the vibrating screen 13 to be separated into sand and oversize stone powder.

When the stone powder generated in the crushed stone plant is transferred to the vibrating screen 13, the powdered stone powder having fine particle size and granularity in the vibrating screen 13 is sprayed through the water sprayed by the nozzle 14. The fine powder is separated and the fine powder is separated, and the fine powder is separated and crushed. The fine powder is separated and crushed. By rotating the circumferential speed of the rod mill having a crushing ratio to 150-300 rpm to compress the crushed stone powder, the circumferential speed of the rod mill is preferably about 200rpm, the size of the stone powder If it is small, the pulverization is performed by rotating the speed of the main speed at a speed of 230-240 rpm, and adjusting the particle size of the crushed stone powder to 250 mm or less by adjusting the gap of the outlet of the jaw crusher 15. And by adjusting the particle size of the stone dust, while reducing the net loading of sand production line it is finished processing the stone dust adjusting as desired the particle size of sand production.

Stone powder having a particle size of 250 mm or less crushed through the jaw crusher 15 is stored in the stock pile 16 and then to the primary cone crusher 17 through the vibration feeder 12 ′. Intermediate grinding of the stone powder is performed by inputting a predetermined amount, and the stone powder having the intermediate grinding completed as described above has a particle diameter of 10 mm or less through the vibrating screen 18, and the stone powder having a size (10 mm) or more except for this is the secondary cone. It is put into the crusher 19 to perform the grinding operation again.

The pulverized stone powder as described above is put into the orthopedic impact crusher 20 and rotated while setting the circumferential speed of the circumference installed therein at 30-50 m / sec while improving the shape of the stone powder by the stalk ring, and then vibrating again. Sand is processed to separate the fine powder of less than 10mm by transferring to the screen 18.

As shown in FIG. 2, the orthopedic impact crusher 20 has a stalk ring 23 installed with the rotor 22 of the main shaft and the inner circumferential edge of the stone powder supplied into the impact crusher 20. Stone powder collides with each other by centrifugal force due to STOCK RING, and at this time, the circumferential speed of the impact crusher is converted according to the size and quality of the supplied stone powder to appropriately control the particle size and granularity of sand.

Stone powder having a particle diameter of 10 mm or less classified by the vibrating screen 18 is deposited on the stone powder stock pile 16 ', and then transferred to the vibrating feeder 12 and sprayed with water by the nozzle 14' vibrating screen ( 30), the sand of 2.5-5mm or less is sorted, and the finer powder is separated from the sand at the vibrating screen 30 'through a rod mill 31 in which a rotary roll rotates and crushes the stone. The fine powder of 5mm or more is again put into the impact crusher 32 for shaping the particles, and then crushed together with the shaping of the particles, and then sent to the vibrating screen 30 again to wash the sand with water through the nozzle and sorting work. Will be performed.

In the above, the particle diameter of the sand is 5 mm or less is used as a relatively coarse aggregate, the sand having a particle size of 2.5 mm or less is used as a relatively fine aggregate.

The sand of 2.5-5 mm or less classified by the vibrating screen 30 is supplied to the spiral classifier 34 together with the water, and the sand and the particle diameter of 0.15 mm or less are supplied together with the water to the spiral classifier 34. The fine powder causes vortexing and the fine powder and water are overflowed into the fine settling tank 33, and more sand is classified and dehydrated by a dewatering screen so that sand having a constant particle size and particle size is obtained. To be manufactured.

As described above, according to the method for preparing sand according to the present invention, it is possible to easily manufacture artificial sand having a constant particle size while removing segregation using unnecessary stone powder generated as a byproduct of crushed stone to produce civil gravel. Of course, the fine powder generated during the production of artificial sand is easily removed from the vibrating screen for each step by spraying water with a nozzle to further improve the crushing efficiency of the crusher while preventing contamination of the surrounding environment due to the scattering of powder powder. It has an excellent effect of manufacturing high quality artificial sand at low cost.

Claims (2)

A stone powder transfer step of storing the stone powder generated in the crushed stone plant in the feed hopper and supplying it to the vibrating screen according to the line balance by adjusting the speed of the vibration feeder; A stone powder sorting step of separating and separating the stone powder transferred to the vibrating screen into a powder and fine powder (soil powder) having a constant particle size and granularity on the vibrating screen by spraying water with a nozzle; Stone processing step to adjust the particle size of the stone to the desired size by adjusting the particle size of the stone to 250mm or less by adjusting the exit gap by rotating the main speed to 150-300rpm by rotating the separated powder into the jaw crusher. Wow, After the stone powder crushed through the jaw crusher is stored in the stock pile (STOCK PILE) and stored in the stock pile (STOCK PILE), a predetermined amount is added to the primary cone crusher through a vibrating feeder to perform the intermediate grinding, the stone grinding is completed intermediate grinding Through the addition of more than 10mm grains, except for the grain size, into the secondary cone crusher, the grinding work is performed. Sand processing step of separating the stone powder of less than 10mm by transferring to the vibrating screen after improving the granule shape of the stone powder, The stone powder classified by the vibrating screen is deposited on the stone powder stock pile, and then transferred to the vibratory feeder to classify sand of 2.5-5 mm or less from the vibrating screen by spraying water by the nozzle, and the more fine powder is rotated by the rotary roll. First, the sand is separated from the vibrating screen through a load mill that compresses and crushes the fine powder. The fine powder of 2.5-5mm or more is put into the impact crusher for shaping the particles, and then crushed together with the shaping of the particles. A sand washing and sorting step of sending sand back to sort the sand; Sand is produced through the sand dehydration step of dewatering the sand of 2.5-5mm or less classified by vibrating screen together with water into a spiral classifier and classifying it into fine powder of 0.15mm or less and more sand. The manufacturing method of the sand to make. The method of claim 1, wherein the stone powder supplied into the impact crusher, the granules and granules of the sand is controlled to be adjusted by the rotor of the main shaft that is in contact with the rotating shaft, and the stalk ring installed on the inner periphery Way.