KR101870332B1 - Device for manufactruring artificial lightweight aggregate using coal and manufacturing method for lightweight aggregate using coal waste - Google Patents

Abstract

According to one embodiment of the present invention, an apparatus for manufacturing artificial lightweight aggregate using coal waste comprises: a pulverizing device pulverizing coal waste into powder; a gravity sorter separating a predetermined amount or less of carbon from coal waste powder provided from the pulverizing device; a mixer mixing, in the gravity sorter, an additive with remaining powder from which the carbon is separated; a kneader mixing mixed powder provided from the mixer with water and kneading a mixture of the mixed powder and the water; a molding device cutting the paste produced by the kneader and shaping the cut paste into a spherical shape; a furnace drying and heating the mixture formed in the molding device; a cooler cooling the mixture dried in the furnace; and a sorter sorting fine aggregate cooled by the cooler according to sizes. According to one embodiment of the present invention, it is possible to recycle coal waste.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an artificial lightweight aggregate manufacturing apparatus and a manufacturing method of an artificial lightweight aggregate utilizing coal waste stone. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to an artificial lightweight aggregate manufacturing apparatus and a manufacturing method using coal waste stone.

Coal has long been a useful resource used in various industries such as thermal power plants and household fuels. The mined coal is separated into coal and other byproducts that are used in industry through physical and mechanical methods. At this time, rocks with coal content of 4000 kcal or less are called coal dumplings, and rocks with no coal content are called dumped dumplings.

Currently, Korea is in a state of being left in coal mines because it is difficult to dispose of coal waste from mining due to environmental pollution control, and the amount of coal waste left is also several hundred million tons. As a result, the abandoned coal waste and the excavated waste waste cause pollution of nearby rivers and groundwater, and local residents are suffering damage.

Coal wastes contain about 20% coal and can be used as an energy source. However, there are various attempts to use such waste coal as an energy source, but there is a suggestion that a commercially significant result is obtained due to the fact that it takes a lot of time to process and a large-scale facility is required I did.

On the other hand, lightweight aggregates are widely used as building materials such as concrete for reducing the weight of high-rise buildings and bridges, insulation and waterproofing of building rooftops and strata, and moisture proof concrete. These lightweight aggregates have characteristics that are lighter than concrete, so they are usefully used where high-rise design or seismic design is required.

Most lightweight aggregates used natural aggregates collected from rivers, mountains and the sea. However, due to the depletion of natural lightweight aggregates due to the increase of aggregate demand, supply of artificial lightweight aggregate is urgently required.

In particular, the necessity of artificial lightweight aggregate has been emphasized due to the necessity of earthquake resistant design for new houses from the second half of 2017, but the technology for manufacturing artificial lightweight aggregate is insufficient in Korea, and it is dependent on imports.

Patent Document 1: Korean Patent No. 10-0943243 (Registered on Feb. 11, 2010)

Embodiments of the present invention have been proposed in order to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus and method for manufacturing artificial lightweight aggregate using coal waste stone for producing artificial lightweight aggregate using coal waste.

The present invention also provides an apparatus for manufacturing an artificial lightweight aggregate and a method for manufacturing the artificial lightweight aggregate using the coal waste scrap that economically produces the artificial lightweight aggregate.

An apparatus for producing an artificial lightweight aggregate using coal waste scum according to an embodiment of the present invention includes: a crusher for crushing waste coal in powder form; A specific gravity sorter for separating carbon from the coal waste powder provided in the crusher to a predetermined content or less; A mixer for mixing the remaining carbon separated carbon in the non-separator with an additive; A kneader for mixing the mixed powder provided in the mixer with water and kneading the mixture; A molding machine for cutting the dough produced through the kneader and shaping the dough into a spherical shape; A calcining furnace for drying and heating the mixture formed through the molding machine; A cooler for cooling the mixture dried through the baking furnace; And a separator for sorting the lightweight aggregate cooled through the cooler by size.

Further, an artificial lightweight aggregate manufacturing apparatus using coal waste waste, which further includes an environmental facility for collecting dust, noxious gas and water vapor generated in the inside of the calcining furnace, can be provided.

Also, the environmental facility may be provided with an artificial lightweight aggregate manufacturing apparatus using a coal waste stone including a heat exchanger for preheating and drying the mixture before the firing furnace is introduced.

Also, the heat exchanger may be provided with an artificial lightweight aggregate production apparatus utilizing coal waste stone for preheating combustion air and fuel of the firing furnace.

In addition, the environmental facility may be provided with an artificial lightweight aggregate production apparatus utilizing coal waste scrap including a carbon capture device.

In addition, the pulverizer may be provided with an artificial lightweight aggregate production apparatus using coal waste scrap for pulverizing coal waste to 80 to 200 mesh.

Also, the non-separator may be configured such that water and an additive are mixed with powders pulverized through the pulverizer, the bubbles are generated by stirring the mixture, and the carbon particles collected by the bubbles are taken out, A lightweight aggregate production apparatus may be provided.

In addition, the non-separator may be provided with an artificial lightweight aggregate producing apparatus using coal waste stone for supplying a residual powder having a carbon weight ratio of 20% or less to the mixer.

The additive to be added to the residual powder in the mixer may be an apparatus for producing an artificial lightweight aggregate using coal waste, which is at least one of limestone, alumina, tungsten, bentonite, loess, red mud and oyster shell powder.

The baking furnace may further include: a driving unit for providing a driving force to move the mixture; And a heating unit for supplying fuel to the inside, and an apparatus for producing an artificial lightweight aggregate using the coal waste scrap that fires the molded mixture at 1100 to 1250 degrees for 50 to 60 minutes may be provided.

The kneader further includes a water injecting unit for supplying water to the coal waste powder, and the molding machine includes an artificial lightweight aggregate manufacturing apparatus using a coal waste stone that receives water through the water injecting unit of the kneader to form the mixture, May be provided.

Also, the lightweight aggregate may be provided with an artificial lightweight aggregate production apparatus utilizing a coal waste stone having a specific gravity of 1.7 or less, a water absorption rate of 15% or less, and a strength of 25 kgf / cm 2 or more.

A method of manufacturing a lightweight aggregate using coal waste scrap according to an embodiment of the present invention includes: a crushing step of crushing coal waste stone into a powder form; A specific gravity selecting step of separating carbon from waste coal waste powder to a predetermined content or less; Mixing the residual powder separated with carbon to a predetermined content or less through the non-pulverizing step with an additive; A kneading step of kneading the mixed powder mixed with the additive to have a predetermined viscosity; A molding step of cutting the kneaded mixture and molding it into a spherical shape; A calcining step of drying and heating the molded mixture; A cooling step of cooling the fired mixture through the firing step; And a screening step of sorting the lightweight aggregate produced through the cooling step according to the size of the lightweight aggregate.

The method may further include a drying step of separating carbon by mixing water and an additive to the coal waste powder in the step of selecting non-specific gravity, and drying the carbon-separated mixture in a powder form. .

Further, a method of manufacturing a lightweight aggregate using coal waste scrap, which further comprises collecting dust, noxious gas, and steam generated in the sintering step, and further collecting and supplying the heat source to the sintering furnace.

The apparatus and method for manufacturing artificial artificial lightweight aggregate using coal waste scrap according to the embodiment of the present invention have an effect of recycling coal waste scrap.

In addition, there is an advantage that an artificial lightweight aggregate can be economically produced.

1 is a flowchart of an artificial lightweight aggregate manufacturing apparatus utilizing coal waste scum according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a vertical cross-section of the gravity sorter of FIG. 1. FIG.
3 is a cross-sectional view showing a cross section of the gravity sorter of FIG. 1 in the horizontal direction.
FIG. 4 is a flowchart illustrating a method for manufacturing artificial lightweight aggregate using coal waste stone according to an embodiment of the present invention.

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

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a flow chart of a lightweight aggregate production apparatus using coal waste scraps according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a vertical direction of the specific gravity sorter of FIG. 1, Sectional view showing a cross section of the gravity sorter in the horizontal direction.

1 to 3, an artificial lightweight aggregate manufacturing apparatus 1 using coal waste scraps according to an embodiment of the present invention is an apparatus capable of artificially manufacturing lightweight aggregate using coal waste scraps.

The lightweight aggregate is a concrete or a mortar aggregate which is lighter in specific gravity than the ordinary aggregate, and can be divided into a natural aggregate made by natural action and an artificial aggregate made artificially. In this embodiment, an apparatus for producing an artificial lightweight aggregate is proposed do.

The coal waste used in the manufacturing apparatus 1 is a waste that is left after the coal is selected in the coal mine area and is not used as an energy source due to its low coal content. For example, coal waste seals can be defined as rocks having a calorie content of 4000 kcal or less per kg.

This manufacturing apparatus 1 comprises a crusher 10 for crushing and crushing coal waste stone raw material, a gravity separator 20 for separating carbon from coal waste stone crushed in the crusher 10, a non-separator 20, A kneader 40 for kneading the mixed powder so as to have a predetermined viscosity, a molding machine 50 for cutting and molding the mixture to a predetermined size, A cooler 70 for cooling the mixture that has passed through the firing furnace 60 and a separator 80 for sorting the lightweight aggregate produced through the cooler 70 by size, And an environmental facility 90 for collecting dust, noxious gas and water vapor generated inside the firing furnace 60.

The crusher 10 is for crushing and crushing a coal waste stone raw material and may include a raw material input portion 110 into which coal waste stone as a raw material is charged and a crushing portion 120 for crushing and crushing coal waste stone have.

The raw material input unit 110 is provided to input coal waste to one side of the crusher 10 and may have a sufficient size to be able to input coal raw waste material in a rock state.

The coal waste lighter inserted through the raw material input portion 110 may be crushed and crushed in powder form through the crushing portion 120. At this time, the coal waste powder provided through the crushing unit 120 may be pulverized to 80 to 200 mesh. Also, a plurality of crushing parts 120 may be provided, so that the coal waste stone can be multi-stage crushed through a plurality of crushing parts 120.

The pulverized and ground coal waste powder in the form of powder can be supplied to the non-separator 20. The specific gravity sorter 20 separates carbon at a predetermined content or less from the coal waste lime that has been crushed in the crusher 10 and includes a main body 210 for forming a storage space, A pipe section 230 coupled to the flow generating section 220, a guide plate 240 for upwardly guiding the mixed liquor flow of the coal waste powder, bubbles generated in the mixed liquor of coal waste powder, A bubble collecting unit 260 for collecting the bubbles which have been swept by the scraper 250 and a driving force transmitting unit 260 for transmitting the driving force to the flow generating unit 220 and the scraper 250. [ And may include a driving unit 270.

Specifically, in order to achieve the optimum quality of the artificial lightweight aggregate, the carbon content must be maintained constant. In this embodiment, the carbon contained in the coal waste segregation is separated through the non-separator 20, and then the artificial lightweight aggregate is produced, so that the produced artificial lightweight aggregate can contain a certain amount of carbon or less. At this time, the carbon weight ratio of the coal waste powder passing through the non-separator 20 may be 20% or less.

The main body 210 forms a storage space capable of accommodating the coal waste powder mixed solution. The main body 210 is provided with an open upper part so that the coal waste powder mixed solution can be introduced. The slope part 211 is formed at one side of the opened upper part, . ≪ / RTI > In this case, the coal waste lump mixture may be a mixture of water and an additive in powdery coal waste lobes pulverized into 80 to 200 mesh. The additive may be a dispersant such as sodium silicate capable of spraying carbon particles, A trapping agent such as kerosene for trapping carbon and a foaming agent such as pine oil which can lower the surface tension of water to facilitate the generation of bubbles. A predetermined mixing device for forming a mixture of coal waste powder may be further provided at one side of the main body 210 or a charging device for injecting water, an additive, etc. into the main body 210 may be provided.

The coal waste powder mixed solution provided inside the main body 210 may be stirred through the flow generating part 220. The flow generating unit 220 may be supported at a center side of the main body 210 through a separate support (not shown) and may be provided with a rotation shaft 221 and an impeller 222. Specifically, when the rotary shaft 221 receives the driving force of the driving unit 270 and rotates, the impeller 222 immersed in the mixed liquid rotates, and the mixed liquid can be stirred through the impeller 222.

When the mixed liquid is stirred through the flow generating unit 220, air can be introduced into the mixed liquid through the pipe unit 230. The pipe portion 230 may be provided to surround the rotation axis 221 of the flow generating portion 220 and may include a separate air introducing portion (not shown). Specifically, the air can be primarily supplied to the pipe portion 230 in accordance with the rotational force of the impeller 222, whereby the flow generating portion 220 stirs the coal lint powder mixture and the air supplied primarily to generate 2 It is possible to generate air bubbles. Therefore, the carbon contained in the coal waste mixture powder can be trapped in the air bubbles and floated.

In addition, the main body 210 may include a separate fine bubble generator 280 to add fine bubbles to the coal waste powder mixture. The minute bubble generating unit 280 may be provided on one side of the main body 210 and may generate bubbles of a minute size in addition to the bubbles generated through the flow generating unit 220 to be provided inside the main body 210 have. At this time, the minute bubbles generated through the minute bubble generator 280 may have a size of 50 to 100 mu.

The carbon bubbles generated by collecting the carbon contained in the mixed liquor of coal waste in the bubbles generated through the flow generating part 220 and the fine bubble generating part 280 can be guided upward through the guide plate 240. The guide plate 240 may be provided in the body 210 as a plate in which the mixed liquid that is stirred through the flow generating unit 220 is collided. Specifically, the position of the guide plate 240 may be changed according to the rotation direction of the flow generating unit 220. For example, when the flow generating unit 220 rotates in a clockwise direction, the flow of the mixed liquid may also be formed in a clockwise direction. Referring to FIG. 3, the guide plate 240, As shown in FIG. That is, the guide plate 240 can be disposed close to the downstream side edge of the mixed liquid flow direction among the corners of the main body 210. The position of the guide plate 240 is not limited to the position of the guide plate 240. For example, the position of the guide plate 240 may be determined by the guide plate 240, May be provided for each corner.

The flow of the coal waste powder mixture mixed with the air can be controlled by the flow generating unit 220 and the flow of the coal waste powder mixed with the air can be controlled by the flow generating unit 220, And may collide with the guide plate 240. At this time, as the mixed liquid comes into contact with the guide plate 240, the air in the mixed liquid becomes finer and thus the amount of bubbles to be produced can be increased. Further, a vortex of the mixed liquid can be formed through the contact between the guide plate 240 and the mixed liquid, and the negative flow amount of the bubble can also be increased.

Meanwhile, the carbon bubbles generated in the main body 210 and floated may be taken out of the main body 210 through the scraper 250. The scraper 250 is provided on the inclined portion 211 of the main body 210 and is capable of turning the carbon bubbles to the outside of the main body 210 by receiving the driving force of the driving portion 270. At this time, the scraper 250 can rotate with a very small interval from the inclined portion 211 of the main body 210, and the minute interval between the scraper 250 and the inclined portion 211 can correspond to the size of the carbon bubble have.

The carbon bubbles that have been cut out of the main body 210 through the scraper 250 can be collected in the bubble collector 260. The bubble collector 260 is provided outside the inclined portion 211 of the main body 210 and may be a space in which the carbon bubbles that have been kicked by the inclined portion 211 are gathered.

When the collection of the carbon bubbles is finished, the remaining carbon waste mixture remains in the interior of the main body 210. At this time, the remaining mixture in the main body 210 may be dried through the drier 290 to be in powder form again. The dryer 290 may be provided at one side of the main body 210 and may receive the mixture in the main body 210 through a conveying device (not shown).

Residual powder separated by carbon through the non-separator 20 can be provided to the mixer 30. [ The mixer 30 may include an additive injection part 310 for mixing the predetermined additive into the residual powder and supplying the additive. At this time, the additive may be limestone, alumina, tailings, bentonite, loess, red mud, oyster shell powder and the like. The additive feeder 310 may include a separate metering feeder (not shown) for feeding the metered amount, through which a predetermined amount of additive may be provided within the mixer 30.

The mixed powder mixed with the predetermined additive through the mixer 30 may be supplied to the kneader 40. The kneader 40 kneads the mixed powder to have a predetermined viscosity, and may include a water input part 410 for supplying water to the mixed powder. At this time, the water input unit 410 may include a separate quantitative feeder (not shown) for supplying a predetermined amount of water, so that a predetermined amount of water can be supplied into the kneader 40. That is, the mixed powder in which the additives are mixed can be mixed with water and kneaded to have an appropriate viscosity.

The kneader 40 may be connected to the molding machine 50 through a conveyor or the like and the coal waste mixture kneaded through the kneader 40 may be supplied to the molding machine 50 and molded to a predetermined size. The molding machine 50 cuts and forms the kneaded mixture, and can provide the mixture in the form of a sphere of a predetermined size. At this time, the water required for molding can be supplied through the water input part 410 of the kneader 40, but the method of supplying water to the molding machine 50 is not limited thereto. For example, the molding machine 50 may include a separate water supply (not shown).

Further, a plurality of molding machines 50 may be provided, so that the mixture can be molded at one time in various sizes. Although two molding machines 50 are provided in this embodiment, the number of molding machines 50 is not limited thereto. For example, three or more molding machines 50 may be provided so that mixtures of different sizes can be molded at one time.

The mixture formed into a spherical shape of a predetermined size through the molding machine 50 can be fired through the firing furnace 60. At this time, the molding machine 50 and the firing furnace 60 may be connected through a conveyor or the like. The firing furnace 60 is a firing furnace for heating and firing, and the firing furnace 60 may be elongated in the longitudinal direction, and a firing space may be formed therein. The firing furnace 60 may include a driving unit 610 for providing a driving force for transferring the mixture and a heating unit 62 for generating heat by supplying fuel to the furnace. At this time, the firing furnace 60 may have a diameter of 2.5 to 3.0 m and a length of 50 to 60 m.

Concretely, the mixture formed into a predetermined size through the kneader 40 and the molding machine 50 may be introduced into one side of the baking furnace 60 and heated while moving from one side to the other side of the baking furnace 60. The time for which the mixture is fired while moving from one side of the firing furnace 60 to the other side may be 50 to 60 minutes and the temperature of the firing furnace 60 may be 1100 to 1250 ° C. The firing furnace 60 may move the mixture through the driving unit 610 and the driving unit 610 may be a motor provided at the center of the firing furnace 60.

The heating unit 620 may be included in one side of the firing furnace 60. The heating unit 620 is an apparatus for generating heat by supplying fuel to the inside of the firing furnace 60 and burning the fuel, and oil or gas including refined oil can be used. In this embodiment, the heating unit 610 is provided close to the side from which the mixture is discharged. However, the position of the heating unit 620 is not limited thereto. At this time, the carbon remaining in the mixture or in the gas generated in the firing process may be burned in the mixture in the firing furnace 60, and the heat generated by the firing may be used for firing as it is. The raw material can be saved.

The mixture fired through the firing furnace 60 can be cooled through the cooler 70. The cooler 70 is provided at one side of the firing furnace 60 and can cool the mixture transferred from the firing furnace 60. At this time, the mixture can be transferred from the firing furnace 60 to the cooler 70 through a transfer device such as a conveyor. The cooler 70 may be provided in a kiln type such as the firing furnace 60 and the cooler 70 may have a diameter of 1.5 to 2 m and a length of 20 to 22 m.

The coal waste mixture is heated and cooled while passing through the calcining furnace 60 and the cooler 70 to be made into a lightweight aggregate. The lightweight aggregate thus produced has a specific gravity of 1.7 or less, a water absorption rate of 15% or less, May be more than 25 kgf / cm 2.

The lightweight aggregate completed through the cooler 70 can be sorted through the separator 80. The sorting device 80 is a device for sorting lightweight aggregates by size, and a plurality of the lightweight aggregates can be provided. In the present embodiment, three sorting machines 80 are provided to sort according to the size of granules, but the number of sorters 80 is not limited thereto. For example, four or more sorting devices 80 may be provided so that lightweight aggregates can be sorted into smaller size ranges.

Meanwhile, dust, noxious gas and water vapor may be generated in the calcining furnace 60 during the calcination of the mixture. At this time, dust, noxious gas, and water vapor generated in the baking furnace 60 can be recovered through the environmental facility 90. Specifically, the environmental facility 90 may include a heat exchanger (not shown), collecting dust, noxious gas, and steam generated during the process of manufacturing the artificial lightweight aggregate, and discharging the waste heat through a heat exchanger Can be recovered. At this time, the recovered waste heat is provided to the heating unit 620, and can be provided for preheating and drying the firing furnace 60 or for preheating the combustion air and the oil inside the firing furnace 60.

In addition, the environmental facility 90 may include a carbon capture device (not shown). Specifically, the remaining powder that has passed through the non-separator 20 may contain carbon having a predetermined content or more. During the calcination of the mixture, the carbon contained in the mixture may be burned, and the unburned carbon may be collected through the carbon capture device (not shown) of the environmental facility 90. That is, since carbon is collected and stored through the environmental facility 90, an artificial lightweight aggregate can be economically provided.

Hereinafter, the operation and effect of the artificial lightweight aggregate manufacturing apparatus 1 using the coal waste incinerator according to one embodiment of the present invention will be described.

The coal waste seals can be crushed and crushed in powder form through crusher 10. At this time, the coal waste powder may have a size of 80 to 200 mesh.

The carbon waste can be separated through the non-separator 20 from the coal waste that has been pulverized in powder form through the pulverizer 10. Specifically, the coal waste powder may be mixed with water and an additive to be supplied to the non-separator 20, and the bubbles formed through the flow generating portion 220 and the fine bubble generating portion 280 of the non- So that it can float. At this time, since the carbon bubbles are separated to the outside of the non-separator 20, only the coal waste mixture containing only a predetermined amount of carbon can be left in the non-separator 20.

The carbon-separated mixture through the non-separator 20 may be dried in powder form through a separate dryer 290, and the dried residual powder may be provided to the mixer 30. The mixer 30 may mix the predetermined amount of additive and the remaining powder, wherein the additive may be limestone, alumina, tailings, bentonite, ocher, red mud, oyster shell powder, and the like.

The mixed powder mixed with the additive may be kneaded through the kneader 40 to have a predetermined viscosity. The kneader 40 may include a water inlet 410 for supplying a predetermined amount of water and may be kneaded to have an appropriate viscosity by mixing water into the mixed powder through the water inlet 410.

The mixture kneaded to have a predetermined viscosity through the kneader 40 can be cut and formed through the molding machine 50. At this time, the molding machine 50 can mold the mixture into a spherical shape, and water necessary for molding the mixture can be supplied through the water injecting part 410 of the kneader 40.

The mixture formed into a predetermined size and shape through the molding machine 50 can be fired through the firing furnace 60. At this time, the firing furnace 60 can be connected to the environmental facility 90, and dust, noxious gas, and water vapor generated inside the firing furnace 60 can be collected in the environmental facility 90. The dust, noxious gas and water vapor collected in the environmental facility 90 may be supplied again to the heating unit 620 of the firing furnace 60 and used as a raw material of the firing furnace 60. Further, since the mixture to be fired in the firing furnace 60 contains a certain amount of carbon, carbon can be burned to supply the heat. As a result, the production apparatus 1 can reduce the cost, so that the lightweight aggregate can be produced economically.

The mixture passing through the baking furnace 60 can be cooled through the cooler 70. Thus, the mixture can be made into a lightweight aggregate through the firing furnace 60 and the cooler 70. At this time, the produced lightweight aggregate has a specific gravity of 1.7 or less, a water absorption rate of 15% or less, and a strength of 25 kgf / cm 2 or more.

The lightweight aggregate that has passed through the cooler 70 can be sorted by size through the sorting device 80. Accordingly, lightweight aggregate can be artificially produced by recycling coal waste scraps.

FIG. 4 is a flowchart illustrating a method of manufacturing a lightweight aggregate using coal waste stone according to an embodiment of the present invention.

Referring to FIG. 4, the coal waste can be crushed and pulverized into a pulverizer 10 (S100). At this time, the mixed solution may be pulverized to a size of 80 to 200 mesh.

The pulverized coal waste powder can be separated from carbon through the non-separator 20 (S200). The gravity sorter 20 can form minute bubbles through the flow generating part 220 and the fine bubble generating part 280, so that the carbon particles can float in contact with the bubbles. Since the suspended carbon particles can be taken out of the non-separator 20 through the scraper 250, only the residual mixture containing the predetermined carbon can be left in the non-separator 20. [ At this time, the mixture may be dried in powder form through a separate dryer 290 (S300). At this time, the dryer 290 may be a microwave dryer.

The remaining powder through the non-separator 20 may be mixed with the additive through the mixer 30 (S400). At this time, the additive to be mixed into the residual powder may be limestone, alumina, tungsten, bentonite, loess, red mud, oyster shell powder and the like.

The mixed powder mixed with the additive may be kneaded to have a predetermined viscosity through the kneader 40 (S500). At this time, the kneader 40 may include a water injecting portion 410 capable of injecting a predetermined amount of water, so that the mixed powder can be kneaded with an appropriate viscosity.

The kneaded mixture may be introduced into the molding machine 50 and cut and molded (S600). The molding machine 50 can mold the mixture into a spherical shape, and water can be supplied through the water injection part 410 of the kneader 40 to mold the mixture.

The sphere-shaped mixture may be fired through the firing furnace 60 (S700). At this time, the firing furnace 60 may be provided with a diameter of 2.5 to 3.0 m, a length of 50 to 60 m, and the mixture may be fired at a temperature of 1100 to 1250 캜 for about 50 to 60 minutes.

Meanwhile, dust, noxious gas, water vapor, and the like may be generated during the firing process of the firing furnace 60. At this time, dust, noxious gas, water vapor, etc. generated in the firing furnace 60 can be recovered through the environmental facility 90 (S800). At this time, the environmental facility 90 may include a separate heat exchanger (not shown) and a carbon capture device (not shown).

The mixture passing through the firing furnace 60 may be cooled through the cooler 70 (S900). The cooler 70 may be a kiln-type cooler having a diameter of 1.5 to 2 m and a length of 20 to 22 m. The mixture is fired through a firing furnace 60, cooled through a cooler 70, and made into a lightweight aggregate.

The lightweight aggregate can be classified through the selector 80 (S1000). At this time, the sorter 80 can sort the lightweight aggregate by the particle size.

Therefore, the manufacturing apparatus 1 can manufacture the lightweight aggregate by utilizing the coal waste scum.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It should be interpreted that it has the broadest range according to. Skilled artisans may implement the pattern of features that have not been explicitly described in combination, substitution of the disclosed embodiments, but which, too, do not depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

1: Manufacturing apparatus 10: Wave crusher
20: Gravity sorter 30: Mixer
40: kneader 50: molding machine
60: firing furnace 70: cooler
80: Selector 90: Environmental facilities

Claims (16)

A crusher for crushing waste coal in powder form;
A specific gravity sorter for separating carbon from the coal waste powder provided in the crusher to a predetermined content or less;
A mixer for mixing the remaining carbon separated carbon in the non-separator with an additive;
A kneader for mixing the mixed powder provided in the mixer with water and kneading the mixture;
A molding machine for cutting the dough produced through the kneader and shaping the dough into a spherical shape;
A calcining furnace for drying and heating the mixture formed through the molding machine;
A cooler for cooling the mixture dried through the baking furnace; And
And a sorter for sorting the lightweight aggregate that has been cooled through the cooler by size,
The above-
Water and an additive are mixed with the pulverized powder through the crusher, the mixture is agitated to generate bubbles, and the carbon particles collected by the bubbles are taken out to the outside
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method according to claim 1,
Further comprising environmental equipment for collecting dust, noxious gas and water vapor generated in the furnace
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
3. The method of claim 2,
The environmental facility includes a heat exchanger for preheating and drying the mixture before the firing furnace is introduced
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method of claim 3,
The heat exchanger is used to preheat combustion air and fuel of the calcining furnace
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
3. The method of claim 2,
The environmental facility includes a carbon capture device
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method according to claim 1,
The pulverizer is used to pulverize coal waste to 80 to 200 mesh
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
delete The method according to claim 1,
The non-separator may be configured to supply residual powder having a carbon weight ratio of 20% or less to the mixer
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method according to claim 1,
The additive added to the remaining powder in the mixer is at least one of limestone, alumina, tungsten, bentonite, loess, red mud, oyster shell powder
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method according to claim 1,
The firing furnace,
A driving unit for providing driving force to move the mixture; And
And a heating unit for supplying fuel to the inside,
The molded mixture is fired at 1100 to 1250 degrees for 50 to 60 minutes
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method according to claim 1,
Wherein the kneader includes a water inlet for supplying water to the coal waste powder,
The molding machine feeds water through the water inlet of the kneader to form the mixture
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
The method according to claim 1,
The lightweight aggregate has a specific gravity of 1.7 or less, a water absorption rate of 15% or less, and a strength of 25 kgf /
An apparatus for manufacturing artificial lightweight aggregate using coal waste.
A pulverizing step of pulverizing the coal waste into a powder form;
A specific gravity selecting step of separating carbon from waste coal waste powder to a predetermined content or less;
Mixing the residual powder separated with carbon to a predetermined content or less through the non-pulverizing step with an additive;
A kneading step of kneading the mixed powder mixed with the additive to have a predetermined viscosity;
A molding step of cutting the kneaded mixture and molding it into a spherical shape;
A calcining step of drying and heating the molded mixture;
A cooling step of cooling the fired mixture through the firing step; And
And sorting the lightweight aggregate produced through the cooling step according to the size,
Further comprising a drying step of mixing the water and the additive to the coal waste powder in the step of separating the carbon to separate carbon and drying the carbon separated mixture in powder form
A method of manufacturing lightweight aggregate using coal waste.
delete 14. The method of claim 13,
Further comprising a heat source collection and supply step of collecting dust, noxious gas, and steam generated in the sintering step and re-supplying the dust to the sintering furnace
A method of manufacturing lightweight aggregate using coal waste.
delete

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