KR101748813B1 - manufacturing method and apparatus of aggregate using waste - Google Patents

Abstract

The present invention relates to a method and an apparatus for manufacturing an aggregate using waste, and more particularly, to a method and an apparatus for producing aggregate using waste, The present invention relates to a method of manufacturing an aggregate and an apparatus for manufacturing the aggregate.
A method of manufacturing an aggregate using waste according to the present invention includes the steps of charging waste wastes selected from metal waste and metal waste materials into an input hopper, transferring the wastes to the waste hopper through a transfer screw, A mixing step of mixing the dough mixed in the mixer with an extruder to form a mixture; a step of mixing the dough mixed in the mixer with the mixture to form a molded article discharged from the extruder; A sintering step of heating and firing while being rotated, and a sorting step of sorting the aggregate obtained in the sintering step by size.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing aggregate using waste,

The present invention relates to a method and an apparatus for manufacturing an aggregate using waste, and more particularly, to a method and an apparatus for producing aggregate using waste, The present invention relates to a method of manufacturing an aggregate and an apparatus for manufacturing the aggregate.

Concrete usually refers to a mixture of coarse aggregate such as cobbles and fine aggregate such as sand in cement, kneaded with water, or hardened.

As for the fine aggregate, according to the concrete standard specification, the weight percentage of the aggregate passing through the sieve body of the sieve is 10 mm 100%, 5 mm 95-100%, 2.5 mm 80-100%, 1.2 mm 50-85% It is an aggregate that satisfies the particle size distribution of 60%, 0.3mm 10-30% and 0.15mm 2 ~ 10%. In addition, it is clean, strong, durable, dust, soil, organic impurities, salt Should not contain any harmful substances.

In addition, the shape should be a cubic shape or a shape close to a sphere, and it should have a surface structure having a large adhesion force with cement. If it is too light, there is a risk of material separation. Therefore, .

Although the steel sand used in the above-mentioned fine aggregate material is principally used, the use amount of the steel sand is gradually decreasing from the viewpoint of environmental protection. In order to replace this, the use amount of the sea sand, crushed sand or reclaimed sand is gradually increasing to be. However, even in the case of sea sand, similar to river sand, it may cause coastal destruction. Therefore, the sampling method is changed from the sampling near the coast to the ocean sampling method, And there are many disadvantages such as the desire of the city.

Alternative aggregates such as blast furnace slag aggregate, copper slag aggregate and lead slag slag have been developed as part of efforts to replace conventional sand fine aggregate.

Korean Patent Registration No. 10-0797297 discloses a slag for replacing fine aggregate of concrete and a concrete composition having excellent durability including the same, and Korean Patent No. 10-1222076 discloses a concrete composition containing a blast furnace slag aggregate .

Although slag is a useful waste material, it has recently become wider in terms of utilization of slag and demand for it, which is disadvantageous from the aspect of original activity and cost of supply and demand.

On the other hand, in general aluminum die casting (casting) or casting operation, aluminum must be melted by high heat of about 700 ℃ or more. In most cases, aluminum melting furnace is installed separately to dissolve aluminum ingot or scrap. It is well known that they are injected one by one.

Aluminum is collected in the dust collector together with dust, which is generated in the melting process of aluminum in the melting furnace. The dust collected in this manner is usually not recycled but buried in the ground for disposal.

In addition, the slag generated on the surface of the molten aluminum is not efficiently recycled, and is discarded.

1. Korean Patent Registration No. 10-0797297: Slag for replacing concrete fine aggregate and concrete composition having excellent durability 2. Korean Registered Patent No. 10-1222076: Concrete composition containing blast furnace slag aggregate

The present invention has been made to overcome the above problems, and it is an object of the present invention to provide an aggregate capable of replacing sand or gravel by mixing aluminum waste dust, aluminum scrap material and carbon waste dust generated in an industrial site with wastewater sludge, And an object of the present invention is to provide a manufacturing method and apparatus for an aggregate which can be recycled as a resource.

In order to accomplish the above object, the present invention provides a method of manufacturing an aggregate using waste, comprising the steps of injecting one of waste selected from metal waste and metal scrap into a feed hopper; A transfer step of transferring the waste charged into the charging hopper by a transfer screw and introducing the waste into the mixer; Cement and water are metered into the mixer and mixed with the waste; A molding step of molding the dough mixed in the mixer by an extruder; A sintering step of heating and firing the formed body discharged from the extruder while rotating the sintered body; And sorting the aggregate obtained in the sintering step by size, wherein the metal waste dust is aluminum waste dust or carbon waste dust, and the metal waste waste material is an aluminum waste slurry.

In the transfer step, the wastewater sludge is supplied to the transfer screw to transfer the wastewater and the wastewater sludge while mixing.

In the mixing step, the pigment is further supplied into the blender and mixed.

In order to accomplish the above object, an apparatus for manufacturing an aggregate using waste according to the present invention comprises a first loading hopper into which waste selected from metal waste powder and metal waste material is charged; A first feeder screw connected to an outlet of the first loading hopper and transferring the waste introduced into the first loading hopper toward the second loading hopper; A second feeder screw connected to a discharge port of the second loading hopper and transferring the wastewater sludge introduced into the second loading hopper toward the first loading hopper; A first feed screw installed between the first feed hopper and the second feed hopper and connected to the first feed screw and the second feed screw to feed the wastes and the wastewater sludge upward while being mixed with each other; A second conveying screw which is inclined in a direction intersecting the first conveying screw and conveys the mixture discharged from the first conveying screw upward; A first metering hopper for metering and discharging the mixture discharged through the second conveying screw downward; Second and third metering hoppers for metering the cement and water and discharging them downward; A mixer in which the first, second, and third metering hoppers are installed at an upper portion, and a mixture, cement, and water are injected and mixed through the first, second, and third metering hoppers; An extruder for shaping the dough discharged from the mixer into a predetermined shape; A rotary kiln for heating and firing the formed body discharged from the extruder while rotating; And a sorter for sorting the aggregate discharged from the rotary kiln by size,

The metal waste powder is aluminum waste powder or carbon waste powder, and the metal waste powder is an aluminum waste powder.

As described above, according to the present invention, waste can be recycled as useful resources by manufacturing aggregates capable of replacing sand or gravel by combining aluminum waste dust, aluminum scrap, and carbon waste dust with disposal wastewater sludge, The production cost can be lowered, which is economical.

Further, the pigment can be mixed to provide a color aggregate having various colors.

Also, the aggregate produced according to the present invention is very useful for producing a concrete block having high strength and light weight properties.

1 is a side view schematically showing an aggregate production apparatus according to an embodiment of the present invention,
Fig. 2 is a plan view of Fig. 2,
3 is a plan view schematically showing an aggregate production apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for manufacturing aggregate using waste according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, an apparatus for producing aggregate using waste according to an embodiment of the present invention includes first and second loading hoppers 1 and 5, first and second feeder screws 11, The first and second conveyance screws 21 and 25, the first to third weighing hoppers 31 to 33 and the mixer 40 and the extruder 55, A kiln 60, and a sorter 100.

The first loading hopper (1) and the second loading hopper (5) are arranged side by side. The first and second loading hoppers (1) and (5) are respectively provided with a discharge port at a lower portion thereof.

The first input hopper 1 is filled with waste selected from metal waste powder and metal scrap.

Metal waste dust means dust containing metal. Such metal waste dust may be aluminum waste dust or carbon waste dust.

Aluminum waste dust is dust recovered from a melting furnace that dissolves aluminum through a dust collector. Generally, in a room provided with an aluminum melting furnace, a dust collector is installed to remove dust generated in the melting process of aluminum and dust in the room. The aluminum dust collected in the dust collector contains various foreign substances such as dust, aluminum (Al) fine particles, and aluminum oxide (Al ₂ O ₃ ) fine particles.

The carbon waste dust is obtained by pouring molten metal into a mold and recovering dust generated during casting through a dust collector. The carbon waste dust collected in the dust collector includes various foreign substances such as dust, metal oxides, carbon, and the like.

Metallic waste materials are generated on the surface of the molten metal in the melting furnace. Aluminum scrap can be used as a scrap metal. Aluminum scrap is generated on the surface of the molten metal in the aluminum melting furnace.

The metal waste slag can be used by pulverizing it into powder. It is needless to say that the metal waste dust and the scrap metal waste can be remained after extracting a useful metal by a conventional method.

The second inlet hopper 5 is supplied with wastewater sludge. Wastewater sludge refers to the sludge generated during the biological treatment of sewage or wastewater. The wastewater sludge may be primarily dehydrated to have a water content of 40 to 80 wt%.

The first feeder screw (11) is installed under the first loading hopper (1). The first feeder screw 11 is connected to the discharge port of the first loading hopper 1 so that waste introduced into the first loading hopper 1 flows into the first feeder screw 11.

The first feeder screw 11 is provided with a helical screw rotating in a cylindrical housing. The waste introduced into one side of the first feeder screw 11 is conveyed in the direction of the second loading hopper 5 by a rotating screw do.

The second feeder screw (15) is installed at the lower part of the second loading hopper (5). The second feeder screw 15 is connected to the outlet of the second feed hopper 5 so that the wastewater sludge injected into the second feed hopper 5 flows into the second feeder screw 15.

The second feeder screw 15 is provided with a spiral screw that rotates inside the cylindrical housing. The wastewater sludge introduced into one side of the second feeder screw 15 is moved in the direction of the first loading hopper 1 by the rotating screw Lt; / RTI >

The first feed screw 21 is installed between the first loading hopper 1 and the second loading hopper 5. The first conveying screw 21 is installed in a direction crossing the first and second loading hoppers 1 and 5. The first feed screw 21 is provided with two inlets, and each of the inlets is connected to the outlet of the first feeder screw 11 and the outlet of the second feeder screw 15. Therefore, the wastes supplied by the first feeder screw 11 and the wastewater sludge supplied by the second feeder screw 15 flow into the first conveyance screw 21, respectively. Inside the first conveying screw 21, the waste and the wastewater sludge are mixed while being mixed with each other. At this time, trace amounts of aluminum and the like contained in the waste react with moisture and become stable hydroxides.

The first conveying screw 21 is provided with a spiral screw rotating inside the cylindrical housing. The first conveying screw 21 is installed to be inclined upward.

The second conveying screw 25 is installed to be inclined in a direction intersecting with the first conveying screw 21. A second conveying screw (25) is connected to an outlet of the first conveying screw (21). The mixture of the wastes discharged from the first conveyance screw 21 and the wastewater sludge is introduced into the second conveyance screw 25 and conveyed upward.

The second conveying screw 25 is provided with a spiral screw rotating inside the cylindrical housing. The second conveyance screw 25 is installed to be inclined upward.

Spray nozzles 23 and 27 may be installed in the first and second conveyance screws 21 and 25 to spray water as shown in FIG. The spray nozzles 23 and 27 are connected to the water tank to spray water into the first and second conveyance screws 21 and 25 by the pump. Water spray inside the first and second conveyance screws 21 and 25 is to react aluminum or the like remaining in the waste with water.

The water spray in the first and second conveyance screws 21 and 25 can be appropriately performed if necessary. For example, when the water content of the wastewater sludge is low or only aluminum waste dust or aluminum waste material is used without using wastewater sludge, an appropriate amount of water is supplied to the first and second conveyance screws 21 (24). ≪ / RTI >

The first metering hopper 31 weighs the mixture discharged through the second conveying screw 25 and discharges it downward. The second weighing hopper 33 weighs the cement and discharges it downward, and the third weighing hopper 35 weighs the water and discharges it downward. Although not shown, the second metering hopper 33 is connected to the interstices where the cement is stored and is supplied with cement. The third metering hopper 35 is connected to the water tank to receive water.

The first to third metering hoppers have a structure in which a conventional meter is installed and discharged by a set amount.

The first to third metering hoppers are installed on the upper part of the mixer 40. Although not shown, a fourth metering hopper may be further provided at the upper portion of the mixer 40 for metering the pigment and discharging the pigment downward to inject the pigment into the mixer 40. The pigments are intended to provide various colors to the aggregate. In addition, a liquid binder can be added to the third metering hopper into which the water is introduced, together with water. Conventional inorganic binders can be used as the binder.

The mixer 40 has a structure in which an agitating impeller is installed therein, and a driving motor for rotating the agitating impeller is installed on the upper part of the cylindrical mixer.

The mixture, cement, and water are introduced into the mixer 40 through the first, second, and third metering hoppers, respectively, and the mixture, cement, and water are mixed by the rotation of the stirring impeller to form a dough.

The extruder 55 shapes the dough discharged from the mixer 40 into a predetermined shape. To this end, a hopper 50 of the extruder 55 is provided below the outlet of the blender 40. The dough is introduced into the extruder (55) through the hopper (50) and extruded. Through the extruder 55, the dough is formed into a granular shaped article such as a pellet.

The molded body, which is molded and discharged in a predetermined shape by the extruder 55, flows into the interior of the rotary kiln 60. The rotary kiln (60) serves to rotate the formed body discharged from the extruder (55) while heating and firing at a high temperature. The rotary kiln (60) is connected to the burner, and high-temperature heat is introduced into the inside thereof. The molded body is fired in the rotary kiln 60.

The sorting machine (100) selects the aggregate discharged from the rotary kiln (60) by size.

The aggregate discharged from the rotary kiln (60) is moved through the elevator (70) and introduced into the sorter.

In the sorter 100, the mesh drum 105 having a rotating net structure is installed to be inclined. The fine aggregate smaller than the mesh size of the mesh drum 105 of the aggregate charged into the mesh drum 105 falls on the first conveyor 107 located below the mesh drum 105 and is smaller than the mesh size of the mesh drum 105 The larger aggregate drops to the second conveyor 109 through an outlet provided on the rear surface of the mesh drum.

Aggregates having a small size and large aggregates separated through the separator 100 may be mixed at an appropriate ratio or used as aggregates according to their respective purposes.

Meanwhile, in the above-described embodiment, the second feed hopper and the second feed screw may be omitted. In this case, an aggregate can be manufactured by using only aluminum waste powder or aluminum waste powder or carbon waste powder alone, or by adding aluminum waste powder, aluminum waste powder, carbon waste powder and wastewater sludge to a single charging hopper .

Hereinafter, an example of a method for manufacturing an aggregate using the above-described aggregate producing apparatus will be described.

First, any waste selected from the metal waste dust and the metal scrap is input into the first loading hopper 1. [

The wastewater sludge is introduced into the second loading hopper 5.

Next, the wastes and wastewater sludge charged into the first and second loading hoppers (1) and (5) are discharged to the first feeder screw (11) and the second feeder screw (15) through the discharge port, respectively.

The wastewater flowing into the first feeder screw 11 flows into the first feed screw 21 and the wastewater sludge introduced into the second feeder screw 15 flows into the first feed screw 21. The weight of the wastewater and the wastewater sludge introduced into the first conveying screw may be 1: 0.5 to 10. The wastes and the wastewater sludge are mixed with each other in the first conveyance screw 21 and then introduced into the second conveyance screw 25. 3, when the spray nozzles 23 and 27 are installed in the first and second conveyance screws 21 and 25, water is introduced into the first and second conveyance screws 21 and 25 A mixture of waste and wastewater sludge can be transferred as it is being sprayed.

The mixture of the wastewater and the wastewater sludge introduced into the second conveyance screw 25 is introduced into the first weighing hopper 31 and a certain amount of the mixture is introduced into the mixer 40 through the first weighing hopper 21, Lt; / RTI >

Cement and water are also introduced into the mixer through the second and third metering hoppers 33 and 35, respectively. For example, 10 to 100 parts by weight of cement and 10 to 60 parts by weight of water may be used based on 100 parts by weight of the mixture to be introduced into the blender.

The mixture, cement and water introduced into the mixer 40 are uniformly mixed by the rotation of the stirring impeller to form a dough. On the other hand, the pigment can be further supplied to the inside of the blender during the mixing process. Colored aggregates having various colors can be produced by the pigment. In addition, a liquid binder can be added to the third metering hopper into which the water is introduced, together with water. Conventional inorganic binders can be used as the binder.

The dough discharged from the inside of the blender 40 is put into an extruder 55 and molded into a predetermined shape.

Then, the molded body discharged from the extruder 55 is introduced into the rotary kiln 60, heated and fired while rotating the molded body. As an example of firing, firing can be performed at 1000 to 1200 ° C for 1 to 6 hours. The compacts fired in the rotary kiln (60) are made of aggregate having a certain strength.

Next, the fired aggregate is sorted by size using the sorting machine 100. [

The calcined fine aggregate is conveyed through the elevator 70 and introduced into the mesh drum 105 of the sorter 100. The fine aggregate smaller than the mesh size of the mesh drum 105 among the fine aggregates charged into the mesh drum 105 drops down on the first conveyor 107 located below the mesh drum 105 and is smaller than the mesh size of the mesh drum 105 The larger fine aggregate falls into the second conveyor 109 through the outlet of the mesh drum.

Small aggregates and large aggregates separated through the separator 100 may be mixed at a suitable ratio or used for each application.

The aggregate produced by the present invention can be blended with cement, stone, and water to make remitars.

As an example of the remiteral, 200-300 parts by weight of the abrasive, 200-300 parts by weight of the fine aggregate and 200-400 parts by weight of water are mixed with 100 parts by weight of the cement. The concrete can be made by pouring the remitar into a mold and curing it. Concrete blocks include bricks, tiles, and architectural finishes.

The concrete block produced in this way has increased strength and weight and has high strength and light weight characteristics compared to conventional concrete blocks.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

1: first loading hopper 5: second loading hopper
11: first feeder screw 15: second feeder screw
21: first feed screw 25: second feed screw
31: first metering hopper 40: mixer
55: extruder 60: rotary kiln
70: elevator 100: selector

Claims (4)

delete An input step of feeding any one waste selected from metal waste and metal scrap to a first input hopper and inputting a wastewater sludge having a water content of 40 to 80 wt% into a second input hopper;
A feeding step of feeding the wastes input into the first feeding hopper and the wastewater sludge fed into the second feeding hopper to a feeding screw and feeding the mixed wastewater into the inside of the blender by mixing with the feeding screw;
Mixing and mixing 10 to 100 parts by weight of cement and 10 to 60 parts by weight of water with respect to 100 parts by weight of the mixture of the waste and the wastewater sludge, and supplying the mixture into the mixer;
A molding step of molding the dough mixed in the mixer by an extruder;
A sintering step of heating the sintered body discharged from the extruder and heating the sintered body at 1000 to 1200 ° C for 1 to 6 hours while rotating the sintered body;
And sorting the aggregate obtained in the sintering step by size,
Wherein the metal waste powder is an aluminum waste powder or a carbon waste powder, the metal waste powder is an aluminum waste powder,
Wherein the conveying step is such that the waste and the wastewater sludge are supplied to the conveying screw at a weight ratio of 1: 0.5-10. The method according to claim 2, wherein the mixing step further comprises supplying a pigment into the mixer to mix the mixture. A first input hopper into which waste selected from metal waste powder and metal waste material is charged;
A second feed hopper into which wastewater sludge having a water content of 40 to 80 wt% is fed;
A first feeder screw connected to an outlet of the first loading hopper and transferring the waste introduced into the first loading hopper toward the second loading hopper;
A second feeder screw connected to a discharge port of the second loading hopper and transferring the wastewater sludge introduced into the second loading hopper toward the first loading hopper;
The wastes and the wastewater sludge are supplied at a weight ratio of 1: 0.5 to 10, and the wastes and the wastewater sludge are supplied to the first and second feeders, A first conveying screw for conveying the mixed material upward;
A second conveying screw which is inclined in a direction intersecting the first conveying screw and conveys the mixture discharged from the first conveying screw upward;
A first metering hopper for metering and discharging the mixture discharged through the second conveying screw downward;
Second and third metering hoppers for metering the cement and water and discharging them downward;
Wherein the first, second and third metering hoppers are installed on top of each other and through the first, second and third metering hoppers, 10 to 100 parts by weight of the cement and 10 to 60 parts by weight A mixer for mixing and mixing the respective components;
An extruder for shaping the dough discharged from the mixer into a predetermined shape;
A rotary kiln for heating and firing the formed body discharged from the extruder while rotating;
And a sorter for sorting the aggregate discharged from the rotary kiln by size,
Wherein the metal waste dust is an aluminum waste dust or a carbon waste dust, and the metal waste slag is an aluminum waste slag.

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