JP3499402B2 - How to recycle aggregate from asphalt waste - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reproduces aggregates from asphalt waste materials by separating aggregates such as crushed gravel of high quality from asphalt waste materials generated at construction sites, civil engineering work sites, etc. It is about the method.

[0002]

2. Description of the Related Art In recent years, road construction has been carried out everywhere on a daily basis, and with it, a large amount of asphalt waste is generated every day. From the viewpoint of effective use of resources, it is desirable to utilize this asphalt waste material in some way. However, the conventional asphalt scrap materials are
There are few effective applications, and only a few applications as roadbed materials and backfill materials have been developed.

[0003]

The above-mentioned roadbed material and backfilling material are obtained by crushing waste asphalt material to a predetermined size, and have a low added value and a very low product unit price. Therefore, it is not attractive to the practitioner to recycle the roadbed material and the backfill material from the asphalt waste material. Demand for roadbed materials and backfill materials is low compared to the amount of asphalt waste materials generated. For this reason, most of the asphalt waste generated every day is mostly discarded as is. That is, most of the asphalt waste materials are landfilled as industrial waste. On the other hand, there is a problem that the landfill sites for industrial waste are decreasing year by year due to the recent growing concern about the environment of the people, and it is difficult to secure new waste sites. In addition, from the perspective of protecting the natural environment, the development of new quarries is becoming more difficult each year.

Therefore, the development of new uses of asphalt waste materials has become an urgent task from the viewpoint of environmental protection and effective use of resources. Here, as an application of the asphalt waste material, a method of crushing the asphalt waste material to take out gravel or crushed stone and utilizing it as an asphalt aggregate or a concrete aggregate can be considered. However,
To date, there is no effective means to separate asphalt from crushed asphalt waste and gravel or crushed stone, and as a result, a method of regenerating aggregate from asphalt waste has not been realized.

Therefore, the present invention focuses on the above-mentioned problems of the prior art, establishes a method for separating gravel or crushed stone from asphalt from crushed asphalt waste, and provides a method for effectively utilizing the asphalt waste. The challenge is to propose.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 is a separation step for crushing asphalt lumps of asphalt waste material and for substantially separating asphalt from aggregate components in the asphalt waste material. And a method of regenerating aggregate from asphalt waste material having a separation step of separating a mixture of an aggregate component and asphalt made by the separation step into an aggregate component and asphalt, wherein the separation step comprises: A method of regenerating aggregate from waste asphalt, characterized in that the mixture is soaked in water, a flow of water at least from above to below is generated in the water, and the asphalt and aggregate components are separated into upper and lower layers. is there.

Here, the aggregate component means both coarse aggregate such as gravel and crushed stone and fine aggregate such as sand. The asphalt separated from the aggregate component refers to a hydrocarbon portion. The method of recycling aggregate from waste asphalt of the present invention utilizes the difference in specific gravity between the aggregate component and asphalt to separate the aggregate component and asphalt. That is, in the method of the present invention, a mixture of aggregate components and asphalt is immersed in water, and the mixture is exposed to a stream of water from bottom to top. Therefore, the mixture is placed in a state of being easily flowed by the water flow, a member containing a large amount of asphalt moves upward, and a member having a small amount of asphalt that can be used as an aggregate relatively dives down. Therefore, the asphalt and the aggregate component are separated into upper and lower layers. Therefore, if only the aggregate that is submerged underneath is taken out, a reusable aggregate can be obtained.

A method for regenerating aggregate from waste asphalt material according to claim 1 is characterized in that the water flow from bottom to top is intermittent, which is an improvement of the above invention. Is.

In the present invention, the water flow is generated intermittently, so that the mixture is subjected to an impact from the bottom to the top by the water flow. The mixture rises to the upper side under this impact, and the amount of rise is larger for a member that contains more asphalt and is lighter. Also, since the water flow is intermittent, the shock-raised mixture then settles, but this settling rate is greater for heavier aggregates with lower asphalt content. In the present invention, by intermittently generating a water flow, the mixture is pushed upward from the bottom and further settled, and this is repeated sequentially to gradually separate the asphalt and the aggregate component into upper and lower layers.

According to a third aspect of the invention, which is an improvement of the above-mentioned invention, in the separating step, the mixture of the aggregate component and the asphalt is placed in a water tank or a basket provided in the water tank, and the water tank or the water tank. A hole is provided at the bottom of the basket provided inside, and water is introduced into the water tank or the basket provided inside the water tank through the hole, and a water flow from bottom to top is generated. It is a method of regenerating aggregate from the asphalt waste material according to 1 or 2.

In the present invention, the mixture of the aggregate component and asphalt is placed in a water tank or a basket provided in the water tank. A hole is provided at the bottom of the water tank or basket, and water is introduced through this hole. Therefore, the water stream blows out from the holes, blows between the aggregate component and the asphalt, and gives the mixture high fluidity.

A further improved invention according to claim 4 is a method for regenerating aggregate from waste asphalt material according to claim 3, characterized in that a valve element is arranged in the hole.

In the present invention, since the valve is provided in the hole, aggregate components and the like do not spill out from the hole.

Further, in the invention according to claim 5 which is a further embodiment of the invention, the water tank used in the separation step has an upper water tank in which a mixture of an aggregate component and asphalt is placed and a lower water tank which vibrates up and down. However, both are connected via a flexible member, and by vibrating the lower water tank up and down,
The method for regenerating aggregate from waste asphalt material according to claim 3 or 4, wherein a water flow from bottom to top is generated in the upper water tank.

In the present invention, by vibrating the lower water tank, the bottom of the lower water tank moves up and down via the flexible member. Therefore, a violent water flow from bottom to top is generated in the upper tank.

According to a sixth aspect of the present invention, which is a further improvement of the above-mentioned invention, in the detaching step, a rotating hollow body-like body and a grinding rod which is a rod rod and / or a spherical body are provided inside the body. using the Migakuko machine, body and Migakuko treatment
Stripping of asphalt by grinding with
The method for reclaiming aggregate from waste asphalt material according to any one of claims 1 to 5 , characterized in that the aggregate is separated.

In the method for regenerating aggregate from waste asphalt material according to the present invention, in the detaching step, a grinding machine equipped with an appropriate rod rod and a spherical grinding processing member inside a rotating hollow body. It is used to remove asphalt attached to crushed gravel and to sort sand and asphalt. Therefore, according to the method of regenerating the aggregate from the asphalt waste material, the asphalt can be exfoliated more accurately.

In order to achieve the same object, the invention according to claim 7 uses a plurality of grinding machines according to the size of the aggregate component in the step of separating, from the asphalt waste material according to claim 6. This is a method of regenerating aggregate.

In the method of reclaiming aggregate from waste asphalt material of the present invention, the asphalt adhering to the crushed gravel portion is peeled off using a plurality of grinding machines according to the size of the aggregate component in the grinding step. . Therefore, according to the method of regenerating the aggregate from the asphalt waste material, the asphalt can be accurately separated for each aggregate component.

In order to achieve the same object, the present invention according to claim 8 is characterized in that the grinding machine is provided with grinding processing members having different rotating directions inside a rotating hollow body.

In the method for reclaiming aggregate from asphalt waste material according to the present invention, the grinding machine is provided with grinding processing members having different rotation directions inside a hollow body, and the grinding machine is used to gravel. Peel off the asphalt attached to the crushed stone and sort sand and asphalt. Therefore, according to the method of regenerating the aggregate from the asphalt waste material, since it is supplied between the main body of the hollow body and the rotating blades of the grinding processing member that rotate in opposite directions to each other, the grinding processing member that rotates eccentrically to the inside The polishing compressive force due to is increased and the polishing performance is further improved,
Moreover, since the collision between the aggregates is mainly performed, the crushing of the aggregate itself can be reduced.

In order to achieve the same object, the invention according to claim 9 further comprises a spiral classifier for separating the aggregate component by rotating the rotary blades in the separating step. It is a method of regenerating aggregate from the asphalt waste material described in Crab.

Further, the invention for achieving the same object is to perform a crushing step of crushing asphalt lumps of asphalt waste materials, and grinding by rotating the asphalt lumps crushed by the crushing step and adhering to crushed gravel stones. The asphalt is generally peeled off, and a sanding step for selecting sand and asphalt, and a separation step for separating gravel crushed stone, sand, etc. from the mixture of the gravel crushed stone and the asphalt and the sand and asphalt. This is a method to recycle aggregate from the asphalt waste material.

In the method of reclaiming the aggregate from the asphalt waste material of the present invention, first, in the crushing step, the asphalt mass is crushed by compression or the like. Then, if necessary, the crushed asphalt lumps are sorted by size. Then, in the grinding process, the crushed asphalt lumps, or the crushed asphalt lumps sorted by size, are ground with a rod rod while rotating to remove the asphalt adhering to the gravel crushed stone, and to remove sand and Select asphalt. Thereafter, in a separation step, a product such as gravel crushed stone and sand is separated from the mixture of the crushed gravel stone and the asphalt and the sand / asphalt. Therefore,
According to the method of reclaiming aggregate from the asphalt waste material, since it is ground by rotating the gravel crushed stone,
Asphalt can be sufficiently peeled off, the amount of asphalt adhered is small, and high-quality aggregate such as gravel crushed stone that meets legal standards can be regenerated.

Further, according to an improved invention of the above-mentioned invention, an appropriate rod bar is provided inside the hollow body in the grinding step.
It is a method of regenerating aggregate from the above-mentioned asphalt waste material using a grinding machine equipped with grinding processing members such as spherical bodies.

In the method of reclaiming aggregate from waste asphalt material according to the present invention, in the grinding step, a grinding machine equipped with a suitable rod rod, spherical body, or other grinding processing member inside a hollow body. It is used to remove asphalt attached to crushed gravel and to sort sand and asphalt.
Therefore, according to the method of regenerating the aggregate from the asphalt waste material, the asphalt can be exfoliated more accurately.

Further, the invention according to claim 10 crushes the asphalt lump of the asphalt waste material and attaches the asphalt.
A crushing step of the crushed material containing gravel crushed stone fraction has the broken
The asphalt adhering to the crushed gravel is generally peeled off by grinding the crushed product by rotating it and finely smashing the particles.
And Migakuko process of selecting a paddle sand, asphalt, gravel crushed stone
To separate crushed gravel from a mixture of mining and asphalt
Separation of sand from fine and fine-grained sand and asphalt
And a separation step, which is a step of performing a grinding step, wherein in the grinding step, a grinding machine equipped with grinding processing members having different rotating directions inside a rotating hollow body is used. This is a method of regenerating aggregate from waste asphalt.

In the method of reclaiming aggregate from waste asphalt material according to the present invention, in the grinding step, a crushed gravel stone is used by using a grinding machine equipped with grinding processing members with different rotation directions inside a hollow body. Peel off the asphalt adhering to the minute and sort sand and asphalt. Therefore, according to the method of regenerating aggregate from the asphalt waste material,
Since it is supplied between the body of the hollow body and the rotating blades of the grinding processing member that rotate in opposite directions to each other, the polishing compression force by the grinding processing member that rotates eccentrically inward increases, and the grinding performance further improves, and Since the collision between the aggregates is mainly performed, the crushing of the aggregate itself can be reduced.

The invention according to claim 11 crushes the asphalt lump of the asphalt waste material, and the asphalt adheres to it.
Crushing process to make crushed material containing crushed gravel stones and size
Separately crushed material is crushed using multiple grinding machines
And Migakuko by rotating the, with roughly peeled asphalt adhering to the gravel crushed stone fraction, and Migakuko step of selecting a fine <br/> sand asphalt particle, and gravel crushed stone fraction
A step of separating crushed gravel from a mixture of asphalt,
And separating sand from fine-grained sand / asphalt
A method for regenerating aggregate from waste asphalt material, which comprises a separation step which is a step.

In the method of reclaiming aggregate from waste asphalt material of the present invention, in the grinding step, a plurality of grinding machines according to the size of the crushed material are used to remove the asphalt adhering to the gravel crushed stone. , Sand and asphalt are selected. Therefore, according to the method of regenerating the aggregate from the asphalt waste material, the asphalt can be accurately separated for each crushed material .

According to a twelfth aspect of the invention, the asphalt lumps of the asphalt waste material are crushed and the asphalt is attached.
A crushing step of the crushed material containing gravel crushed stone fraction has the broken
The asphalt adhering to the crushed gravel is generally peeled off by grinding the crushed product by rotating it and finely smashing the particles.
And Migakuko process of selecting a paddle sand, asphalt, gravel crushed stone
To separate crushed gravel from a mixture of mining and asphalt
Separation of sand from fine and fine-grained sand and asphalt
And a is a separation process step of, in said separation step, gravity sorter separated by specific gravity, and bone asphalt waste characterized by comprising using a spiral classifier of separating by the rotation of the rotary blade This is a method to recycle the material. In the method for recycling aggregate from asphalt waste material of the present invention, in the separation step, a specific gravity sorter for separating by specific gravity according to the size of the aggregate component, and
Using a spiral classifier that separates by rotation of rotary blades, a product such as gravel crushed stone, sand, and asphalt is separated from the mixture of the crushed gravel and the asphalt and the sand / asphalt. Therefore, according to the method of regenerating the aggregate from the asphalt waste material, the product can be separated more accurately.

According to the invention of claim 13, the asphalt lumps of the asphalt waste material are crushed and the asphalt is attached.
A crushing step of the crushed material containing gravel crushed stone fraction has the broken
The asphalt adhering to the crushed gravel is generally peeled off by grinding the crushed product by rotating it and finely smashing the particles.
And Migakuko process of selecting a paddle sand, asphalt, gravel crushed stone
To separate crushed gravel from a mixture of mining and asphalt
Separation of sand from fine and fine-grained sand and asphalt
A specific gravity sorter that vibrates and separates by specific gravity in the separation step, and
It is a method for regenerating aggregate from waste asphalt material, which is characterized by using a spiral classifier that separates by rotation of rotary blades. Further, in the present invention, it is desirable to use the specific gravity sorter and the spiral classifier depending on the size of the aggregate component.

In the method for regenerating aggregate from waste asphalt according to the present invention, in the separation step, a specific gravity sorter for vibrating according to the size of the aggregate component to separate the aggregate component by specific gravity, and rotation of rotary blades A spiral classifier for separating aggregate components is used to separate products such as gravel crushed stone, sand, and asphalt from the mixture of the crushed gravel and the asphalt and the sand / asphalt.
Therefore, according to the method of regenerating the aggregate from the asphalt waste material, vibration is directly applied to the aggregate by air or the like,
Selection according to products can be performed accurately. In addition, you may use this specific gravity sorter in multiple lines in a separation process.

According to a fourteenth aspect of the present invention, asphalt lumps of waste asphalt material are crushed and asphalt is attached.
A crushing step of the crushed material containing gravel crushed stone fraction has the broken
The asphalt adhering to the crushed gravel is generally peeled off by grinding the crushed product by rotating it and finely smashing the particles.
And Migakuko process of selecting a paddle sand, asphalt, gravel crushed stone
To separate crushed gravel from a mixture of mining and asphalt
Separation of sand from fine and fine-grained sand and asphalt
The asphalt characterized by using a pressure classifier that separates by pressure and specific gravity in the separation step, and a spiral classifier that separates by rotation of a rotary blade in the separation step. This is a method of regenerating aggregate from waste materials.

In the method of regenerating aggregate from waste asphalt material of the present invention, in the separation step, a pressure sorter for applying pressure according to the size of the aggregate component to separate the aggregate component by specific gravity, and a rotary blade A spiral classifier that separates aggregate components by rotation is used to separate products such as gravel crushed stone, sand, and asphalt from the mixture of the crushed gravel stone and the asphalt and the sand / asphalt. Therefore, according to the method of regenerating the aggregate from the asphalt waste material, the aggregate is directly pressurized and vibrated by the air or the like, so that the selection according to the product can be accurately performed. In addition, you may use this pressurizing and sorting machine in multiple lines in a separation process.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Specific embodiments will be described below with reference to the drawings in order to further clarify the gist of the method for regenerating aggregate from waste asphalt according to the present invention. First, a first embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 shows an overall process diagram of a first embodiment of the present invention including a crushing process, a grinding process, and a separation process. In addition, in the following embodiments, a separation process is configured by combining both the crushing process and the grinding process.

First, in the crushing step, the asphalt lump B generated at the road construction site or the like is carried by the carriage K and put into the asphalt hopper 1 by the dump S or the like. The asphalt lump B put into the asphalt hopper 1 is reciprocally moved by a reciprocating feeder 2.
Is moved by and is put into the jaw crusher 3. The jaw crusher 3 has a fixed plate 31 and a movable plate 33, and the movable plate 33 reciprocates toward the fixed plate 31 when the rotating body 32 rotates.

The above-mentioned asphalt block B is thrown from the reciprocating feeder 2 between the fixed plate 31 and the movable plate 33 of the jaw crusher 3 and crushed, and the vibrating sieve 4 sands / asphalt with a diameter of less than 5 mm and gravel with a diameter of 5 mm or more. Sorted into crushed stone. A large amount of asphalt is attached to the crushed gravel. The above-mentioned gravel crushed stones are ground by a mining machine 5.
1, sand and asphalt are sent to another grinding machine 5
Sent to 2. The crushed gravel content is further sorted by a net or the like into a diameter of 30 mm or more and less than 60 mm, a diameter of 60 mm or more and less than 100 mm, a diameter of 100 mm or more, and the like, and those larger than necessary are removed.

The next grinding step is a rod mill type grinding machine 5.
This is done using 1, 52. FIG. 2 shows the above-mentioned grinders 51, 5
2 shows a hollow main body 511 provided with an input port 513 for inputting crushed gravel content on one side and a discharge port 514 on the other side, and some rod rods 5 inside.
It has twelve. Further, the discharge port 514 is provided with a freely adjustable plate 515 that is movable so as to change the diameter of the discharge port 514, and the universal adjustment plate 515 is fixed at a predetermined position to discharge the crushed gravel diameter. Is selectable. Further, on the outside of the discharge port 514, a wire mesh screen 51
A Trommel classifier 517 of No. 6 is provided. In addition, in the present embodiment, although the rod rod is used, it may be a spherical body such as iron, and without using a grinding ore treatment member such as the rod rod or the spherical body, the gravel crushed stones May be ground.

In the grinding step, the crushed gravel stones selected in the above crushing step are put into a grinding machine 51 together with water, and the space between the rotating hollow body 511 and some rod rods 512 provided inside. And asphalt is separated from the crushed gravel. Then, it is discharged from the grinder 51 as a mixture of crushed gravel, sand, asphalt, and asphalt. In the gravel crushed stone portion discharged from the grinder 51, some asphalt adheres to the gravel crushed stone, but the amount of asphalt adhered is significantly smaller than that before the grinder 51 was charged. Then, the mixture of crushed gravel stones and the like discharged from the grinder 51 is sorted by a trommel type classifier 517 (see FIG. 2) having a wire mesh-like sieve 516 to select fine sand / asphalt. Further, the selected sand / asphalt is selected in the crushing step, and the sand / asphalt sent from the vibrating screen 4 is put into another grinding machine 52 and is ground by the same operation as above. Peel off asphalt from sand and discharge as a mixture of sand and asphalt.

Next, in the separation step, first, the mixture of crushed gravel stones and asphalt discharged from the ore grinder 51 is fed to the specific gravity sorter 6. This specific gravity sorter 6
An upper fixed water tank 62 and a lower movable water tank 64 are connected by a flexible joint such as rubber,
A mesh iron plate 61 is provided in the middle. Then, the mixture of the crushed gravel stones and the asphalt is separated by the gravitational gravity sorter 6 from the gravel crushed stones J, the asphalt mixture M and the water W.
And separated.

The specific gravity sorter 6 used in the separation step and its operation will be described in detail below. Figure 3
It is a front view of the specific gravity sorter 6. FIG. 4 is a sectional view of the specific gravity sorter 6. Further, FIG. 4 is an exploded perspective view of the specific gravity sorter 6. The specific gravity sorter 6 is a fixed water tank 6 at the top.
2 and the lower movable water tank 63, both of which are flexible members 7
3 through which the basket 75 is suspended in the fixed water tank 62.

That is, the fixed water tank 62 is a frame-shaped member having no bottom. The lower movable water tank 63 is a bottomed member having an open upper portion, and is provided with a spring 78 (see FIG.
(See) and is supported in a floating manner. The lower portion of the fixed water tank 62 and the upper portion of the lower movable water tank 63 are connected by a flexible joint member 80 such as rubber so as to prevent water leakage, and the lower portion of the fixed water tank 62 and the lower movable water tank 63 are connected. Together form one aquarium. A water injection pipe 82 is arranged in the water tank in which both are integrated, and water is constantly injected.

A crank 83 is attached to the lowermost part of the lower movable water tank 63, and the crank 83 is rotated by a drive unit 63 operated by a main motor 68 rotating at a high speed and a sub motor 69 rotating at a low speed. Therefore, the lower water tank 63 vibrates vertically due to the rotation of the main motor 68 and the sub motor 69. A rotary feeder 85 is attached to the end of the fixed water tank 62.

The basket 75 is provided with an inclination extending from one end to the other end, and at the bottom, the above-mentioned eye iron plate 61 is provided.
Is provided. Here, the eye iron plate 61 is a steel plate provided with a large number of round holes 86 as shown in FIG. The side surface of the basket 75 is open on the downstream side of the inclination. Basket 75
Has a crosspiece 87 at the top. The basket 75 is suspended in the fixed water tank 62 with the crosspiece 87 abutting against the upper end of the fixed water tank 62. A thumb-sized steel ball 87 is spread in the basket 75 to close the hole 86 of the eye iron plate 61. The steel ball 87 functions as a valve body.

In the specific gravity sorter 6, when the main motor 68 and the sub motor 69 are rotated and the lower water tank 63 vibrates via the crank 83, the bottom of the water tank moves up and down. Vertical water flow is generated. Then, in the basket 75, the water flow is a one-way flow from bottom to top, and an impulsive and intermittent flow occurs.

That is, when the lower movable water tank 63 moves upward and a shocking water flow is generated in the water in the water tank from the bottom to the top, the water flows from the fixed water tank into the basket 75 through the hole 86. At this time, the steel ball 87 moves into the basket 7.
Since it is in 5 and can move freely, it moves by being pushed by the water flow and opens the hole of the eye iron plate 61. Further, the water stream blows out from the holes and blows between the aggregate component and the asphalt, giving the mixture high fluidity.

Next, when the lower movable water tank moves downward, a downward water flow is generated in the water tank, but the water flow is small in the basket 75 only. That is, when the lower movable water tank 63 moves downward, the bottom of the water tank descends, but in the basket 75,
The steel ball 87 is moved by the downward water flow, and the hole 86 of the eye iron plate 61 is closed. That is, the steel ball 86 serves as a valve to prevent water from flowing from the basket 75 to the water tank side.

Therefore, as the lower movable water tank 63 vibrates, a shocking pulsating flow is generated in the basket 75. The shortage of water in the aquarium due to the generation of pulsating flow in the basket 75 is supplemented by the water supply pipe 82. In the present embodiment, the fixed water tank 62 in which the basket 75 is hung is adopted, but this configuration is not essential, and the mixture of gravel crushed stone and asphalt may be directly charged into the fixed water tank. It is possible. When this configuration is adopted, a fixed eye iron plate is attached to the fixed water tank, and a hole is directly provided in the lower portion of the fixed water tank.

Returning to the description of the whole process, the mixture of crushed gravel and asphalt discharged from the grinding machine 51 is put into the basket 75 of the specific gravity sorter 6. Then, as described above, the lower movable water tank 63 vibrates vertically, and a shocking pulsating flow from bottom to top is generated in the basket 75, and the mixture is exposed to this pulsating flow. Therefore, the mixture repeatedly floats and sinks while being vibrated.
And the asphalt (indicated by a triangle in Figure 4)
Compared to gravel crushed stone (indicated by a circle in Fig. 4), the floating force when a water flow is generated is large and the amount of sedimentation when the water flow is stopped is small. Therefore, the asphalt moves upwards in the order, and the gravel crushed stones go down in the order. Therefore, the asphalt and crushed gravel are separated into upper and lower layers. In reality, there are few perfect gravel stones and perfect asphalt,
Since most of them are stuck together at various ratios, the gravel crushed stone with a large amount of asphalt adhered moves up and the gravel crushed stone with a small amount of asphalt adheres to the bottom.

Since the bottom surface of the basket is provided with a slope, the mixture moves along this slope. Therefore, when the mixture reaches the end on the inclined side of the basket, that is, the open surface, there is gravel crushed stone in the lower layer,
There is asphalt in the upper layer.

Then, the rotary feeder 85 provided at the end of the fixed water tank 62 takes out only the crushed gravel stone at the bottom of the basket 75. The crushed gravel stone shows some asphalt adhesion, but is sufficiently durable to be used as coarse aggregate. Therefore, the crushed gravel content extracted by the rotary feeder 85 is used as recycled coarse aggregate as a final product. On the other hand, asphalt in the upper layer overflows from the fixed water tank 62 and is collected separately. The asphalt that overflows from the fixed water tank 62 is discarded.

The mixture of sand and asphalt discharged from another grinding machine 52 is put into a spiral classifier 7 and separated into sand N and asphalt T by utilizing the rotation of spiral blades. It This sand N also has some asphalt adhesion, but is sufficiently durable to be used as fine aggregate. Therefore, the sand N is used as a recycled fine aggregate that is a final product. On the other hand, asphalt T
The thickener 8 separates the asphalt T and water W,
Be discarded.

According to the first embodiment described above, the mining machine 51,
Asphalt is surely removed by 52, so sand N
Products such as and gravel crushed stone J are of high quality. Further, in the above-mentioned separation step, since the specific gravity sorter and the spiral classifier are used, the products can be separated more accurately.

The data of the coarse aggregate regenerated by the method of the first embodiment is used as the Japanese Industrial Standard JISA50.
05-1993 [hereinafter referred to as "Japanese Industrial Standard" only. ]
Table 1 below shows the physical properties of the crushed stone for concrete. As is clear from the data shown in Table 1, it is clear that the quality of the recycled coarse aggregate made of waste material in the method of the present invention is considerably higher than the numerical values shown in the Japanese Industrial Standards. Therefore, it can be understood that the recycled coarse aggregate made of waste material in the method of the present invention can be used as aggregate for concrete.

[0056]

[Table 1]

Further, the data of the recycled fine aggregate according to the experimental example based on the first embodiment is shown in Table 2 below in comparison with the physical properties of the crushed stone for concrete of Japanese Industrial Standard. As is clear from the data shown in Table 2, it is clear that the quality of the recycled fine aggregate made of waste material in the method of the present invention is considerably higher than the numerical values shown in the Japanese Industrial Standards. Therefore, in the method of the present invention, it can be understood that the recycled fine aggregate made of waste material can be used as the aggregate for concrete.

[0058]

[Table 2]

In addition, according to the example based on the first embodiment, recycled coarse aggregate corresponding to crushed stone No. 6 and recycled fine aggregate corresponding to coarse sand were recycled. Then, a Soxhlet extraction test was performed on both of them to investigate the amount of asphalt in the recycled aggregate. Further, an aggregate stability test (JIS A1122) with sodium sulfate was performed on both of them. For reference, the asphalt component was removed from both recycled aggregates, and the recycled aggregates after the removal were also subjected to a stability test (JIS A1122) of the aggregates with sodium sulfate. Further, a slender flatness test of the coarse aggregate was performed on the recycled coarse aggregate corresponding to No. 6 crushed stone. Further, a peeling test (JHS201) of the asphalt coating was performed on the recycled aggregate corresponding to No. 6 crushed stone. The results of these tests are shown in Table 3 in comparison with the standard values of the asphalt pavement requirements.

[0060]

[Table 3]

From the test results shown in Table 3, it can be understood that the recycled aggregate made of waste material in the method of the present invention can be used as an aggregate for asphalt although the elongated flatness ratio after removal of asphalt is slightly high. Further, as shown in Table 3, the recycled aggregate made of waste material in the method of the present invention is
The small amount of asphalt, coupled with the low water absorption as described above, proves that it is suitable as an aggregate for concrete. In particular, the recycled coarse aggregate has an extremely small amount of asphalt of 2.2%, and it can be understood that the recycled coarse aggregate has sufficient performance as a coarse aggregate for concrete.

Next, a second embodiment will be described with reference to FIGS. FIG. 6 is an overall process diagram of the second embodiment including a crushing process, a grinding process, and a separation process.

The crushing process of the second embodiment is exactly the same as that of the first embodiment described above. That is, the asphalt lump B generated at the road construction site or the like is transported by the trolley K and the asphalt hopper 1 by the dump truck S or the like.
It is thrown in. The asphalt lump B charged into the asphalt hopper 1 is moved by the reciprocating reciprocator 2 and charged into the jaw crusher 3. The jaw crusher 3 has a fixed plate 31 and a movable plate 33 that reciprocates toward the fixed plate 31 when the rotating body 32 rotates. The asphalt block B is the same as the fixed plate 31 of the jaw crusher 3. It is thrown into the space between the movable plates 33 and crushed, and sorted by the vibrating sieve 4 into sand / asphalt with a diameter of less than 5 mm and crushed gravel with a diameter of 5 mm or more. Here, the crushed gravel stones are sent to the grinder 51a, and the sand and asphalt are sent to the grinder 52a. The crushed gravel content is further sorted by a net or the like into a diameter of 30 mm or more and less than 60 mm, a diameter of 60 mm or more and less than 100 mm, a diameter of 100 mm or more, and the like, and those larger than necessary are removed.

Next, in the grinding step, cylindrical grinding machines 51a, 52a are arranged, and first, the crushed gravel stones selected in the crushing step are charged into the grinding machine 51a together with water. While rotating the hollow body-shaped main body 511a and the cylindrical grinding ore treatment member 512a provided in the main body 511a in mutually different directions, the gravel crushed stone portion is lengthened between the main body 511a and the ore treatment member. Direction plate-shaped protrusion 518
a between 5a and 519a, asphalt is separated from the crushed gravel and discharged as a mixture of crushed gravel and asphalt, and at the time of discharging, a wire-mesh-like sieve 516a.
The sand and asphalt are sorted by the Trommel type classifier 517a (see FIG. 7). Furthermore, the selected sand / asphalt is selected in the crushing step, and the sand / asphalt sent from the vibrating screen 4 is put into a grinding ore mining machine 52a having the same structure as that of the grinding / mining machine 51a. Grinding is performed by the same operation, the asphalt is separated from the sand, and the mixture is discharged as a mixture of sand and asphalt.

Further, FIGS. 7 and 8 show the polishing machine 51.
a and 52a are shown, and the body 511 is a hollow body.
An input port 513a for inputting crushed gravel to one side of a,
A discharge port 514a is provided on the other side, and a large number of plate-shaped protrusions 518a are provided in the inner length direction. Further, inside the main body 511a, a cylindrical grinding ore treatment member 512a that rotates in a direction different from that of the main body 511a is provided, and a large number of plate-shaped projections are formed outside the ore treatment member 512a in the longitudinal direction. The portion 519a is provided. In addition, the discharge port 514a
Is provided with a freely adjustable plate 515a that is movable so as to change the diameter of the discharge port 514a.
5a is fixed at a predetermined position so that the diameter of the crushed gravel to be discharged can be selected. Further, outside the discharge port 514a, a trommel-type classifier 5 including a wire-mesh-shaped sieve 516a is provided.
17a is provided.

As shown in the drawing, as in the first embodiment, the main body 511a has a taper shape with a large diameter on the inlet 513a side and a small diameter on the outlet 514a side. It is easy to transfer, and the gravel crushed stone content can be retained appropriately to enable even grinding. Further, a pair of outer ring bodies 52 provided on the outer circumference of the main body 511a.
Reference numeral 0a denotes a tire (not shown) which is designed to be driven by a drive wheel 521a having a cushioning property, abuts against a side portion of the outer ring body 520a, supports the axial direction of the main body 511a and is rotatable. Wheels are provided.

In the separation step, unlike the previous embodiment, the pressure sorter 6a is used to separate the crushed gravel and asphalt. FIG. 9 is a pressure sorter 6a used in this embodiment.
Is shown. The pressure sorter 6a inclines slightly downward from the charging position 61a of the mixture of crushed gravel and asphalt toward the discharge ports 65a and 66a of the crushed gravel, and the transfer plate 62a in the form of a grid is placed in the middle. The main body 60a is provided, and the water pipe 6 is provided below the transfer plate 62a.
7a and a compressed air delivery pipe 68a connected to the tip side portion of the water feed pipe 67a, and a mixture of air and water is directed from the tip of the water feed pipe 67a toward the transfer plate 62a and formed into a grid-like through hole. It is possible to eject toward crushed gravel through the.

Further, in the vicinity of the middle of the transfer plate 62a, the gravel crushed stone J and the asphalt mixture M are made to have a constant upper level level of the mixture of gravel crushed stone and asphalt.
There is provided a sorting device 64a including a float portion 641a for sorting and a control portion 642a for properly separating the float portion 641a by controlling the height direction and the like. 69a is a drain pan that receives the water and sand generated above. The selected asphalt mixture M and crushed gravel J are drained by the bucket conveyors C1 and C2 located below and accumulated below.

Returning to the explanation of the steps, the above-mentioned grinding machine 51 is used.
When the mixture of crushed gravel stones and asphalt discharged from a is fed through the inlet 61a of the pressure sorting machine 6a and moved on the transfer plate 62a provided in the main body 60a, the lower delivery pipe 68a is used. Due to the pressure of the mixture of air and water that is ejected, the asphalt having a small specific gravity is separated into the lower layer and the gravel crushed stone having a large specific gravity is separated into the upper layer, and the gravel crushed stone J is sorted in the middle of the transfer plate 62a by the sorting device 64a. Moves onto the guide plate 63a and drops from the discharge port 66a, and the asphalt mixture M drops from the discharge port 65a and is separated into crushed gravel, asphalt mixture M and water W. Then, the crushed gravel is used as the final aggregate coarse aggregate, and the asphalt is discarded.

The mixture of sand and asphalt discharged from the grinding machine 52a is put into the spiral classifier 7 and separated into sand N and asphalt T by using the rotation of the spiral blade. Then, the sand N is utilized as a fine aggregate which is a final product, and the asphalt is separated into the asphalt T and the water W by the thickener 8 and then discarded.

According to the above-described second embodiment, the grinding machines 51a and 52a suppress the crushing of the gravel crushed stone itself and the like, and further improve the grinding performance to surely remove the asphalt. Therefore, products such as sand N and crushed gravel J are of high quality. Further, in the above separating step, by using a specific gravity sorter, a pressure sorter or a spiral classifier, the products can be reliably separated according to the products.

The test data of the recycled coarse aggregate and recycled fine aggregate manufactured by the second embodiment described above are almost the same as the data of Tables 1 and 2 described above. Therefore,
It is clear that the quality of the recycled aggregate produced by the method of the present invention is quite high.

Next, a third embodiment will be described with reference to FIG. FIG. 10 is a process drawing showing the third embodiment of the present invention. The method for regenerating aggregate from waste asphalt according to the present embodiment roughly includes a crushing step, a grinding step, and a separation step. Also in this embodiment, the detachment process is completed by the crushing process and the grinding process. In the present embodiment, selection in the crushing process of the previous embodiment is made easier. That is, in the present embodiment, the crushing step is focused on dividing the size into a certain size or less, and the sorting is not intended.

In the crushing step, the asphalt lump B generated at the construction site or the like is put into the asphalt hopper 1 by the shovel D or the like. The asphalt lump B charged into the asphalt hopper 1 is moved by the reciprocating reciprocator 2 and is passed through the vibrating screen 70. Then, the vibrating screen 70 is used to select, for example, a diameter of about 100 mm or more and a diameter of about 100 mm or less, and only the diameter of about 100 mm or more is used for the jaw crusher 3.
Be thrown into. This jaw crusher 3 is fixed plate 3
1 and the movable plate 33 are the same as those in the previous embodiment, but are different in that the movable plate 33 is provided with angular protrusions 90. The reason why the jaw crusher 3 is provided with the angular protrusions 90 is that the asphalt is viscous.
This is because it is effective to crush it so that it breaks down. Then, the asphalt block B crushed by the jaw crusher 3 is passed through the vibrating screen 4 together with the asphalt block B passing through the vibrating screen 70.

In the vibrating screen 4, for example, a screen having a diameter of about 60 mm or more and a screen having a diameter of about 60 mm or less are selected. Those having a size of about 60 mm or less that have passed through the vibrating screen 4 are sent to the grinding machine 51. The grinder 51 is the same as that used in the first embodiment described above. On the other hand, the one having a size of about 60 mm or more, which has been sieved by the vibrating screen 4, is put into the impact crusher 91 and is again passed through the vibrating screen 4. As a result, all the asphalt lumps B are crushed to about 60 mm or less and sent to the grinding machine 51.

The crushed material of the asphalt block B charged into the grinding machine 51 is ground between the rotating hollow body 511 and some rod rods 512 provided inside, and the crushed gravel stones The asphalt is peeled off and discharged as a mixture of crushed gravel and asphalt, and a trommel classifier 517 (Fig.
Select fine sand and asphalt with fine particles.

The mixture of crushed gravel stones and asphalt discharged from the grinder 51 is fed to the specific gravity sorter 6. This specific gravity sorter 6 is the same as that used in the first embodiment, and includes an upper fixed water tank 62S having a mesh-shaped eye iron plate 61 provided in the middle thereof and a lower movable water tank 64 which is swung by a drive unit 63. They are connected by a rubber joint member 80. Then, by the rotary feeder 85 provided at the end of the fixed water tank 62, the basket 7
Only the crushed gravel at the bottom of 5 is removed. The crushed gravel is used as recycled coarse aggregate, which is the final product. On the other hand, the upper layer asphalt overflows from the fixed water tank 62 and is collected separately. The asphalt that overflows from the fixed water tank 62 is discarded.

On the other hand, the mixture of the sand content and the asphalt discharged from the grinder 52 is introduced into the spiral classifier 7,
Utilizing the rotation of the spiral blade, the sand N and the asphalt T are separated. Then, the sand N is used as a recycled fine aggregate as a final product, and the asphalt T is discarded.

The test data of the recycled coarse aggregate and recycled fine aggregate produced by the third embodiment described above are almost the same as the data of Tables 1 and 2 described above. Therefore,
It is clear that the quality of the recycled aggregate produced by the method of the present invention is quite high.

The concrete method and apparatus for carrying out the present invention are not limited to the above-mentioned embodiments,
It may be arbitrarily set within the range in which the above-mentioned objects, actions and effects of the invention described below are achieved, and any of these changes does not change the gist of the present invention.

[0081]

As described in detail above, the present invention is
There is an effect that the aggregate component and the asphalt can be easily separated.

The present invention also comprises a crushing step of compressing and selecting crushed asphalt lumps, and crushing and selecting crushed gravel stones and sand / asphalt to remove asphalt.
Grinding process to obtain a mixture of gravel crushed stone and asphalt and sand / asphalt, and a mixture of the gravel crushed stone and asphalt and gravel crushed stone from the sand / asphalt, sand,
By comprising a separation step for separating products such as asphalt, there is an effect that the amount of asphalt adhered is small and aggregates such as crushed gravel of high quality that meet legal standards can be regenerated.

Further, in the above-described grinding step, an appropriate grinding rod processing member such as a rod rod or a spherical body is provided inside the hollow body, or the grinding stone is intended to grind gravel crushed stones. By using a machine, the crushing of gravel crushed stone etc. is suppressed to a minimum, and the grinding performance is further improved, the asphalt peeling is made more accurate, and a higher quality is obtained. It has the effect of regenerating the aggregate. Also,
By using a plurality of grinding machines according to the size of the product in the grinding step, there is an effect that the asphalt can be peeled off accurately for each product.

In the separation step, a specific gravity sorter for separating products by specific gravity or pressure depending on the size of the products, a pressure sorter, and a spiral classifier for separating products by rotating the rotary blades are used. By so doing, there is an effect that the separation of the product can be made more accurate and a higher quality aggregate can be regenerated. If a plurality of specific gravity sorters or pressure sorters are used in series, the sorting effect is further improved. As described above, the present invention is a practical and excellent invention that has a unique effect that has never been obtained.

[Brief description of drawings]

FIG. 1 is an overall process diagram showing a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a main part of a grinder used in the first embodiment of the present invention.

FIG. 3 is a front view of a specific gravity sorter used in the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a specific gravity sorter used in the first embodiment of the present invention.

FIG. 5 is an exploded perspective view of a specific gravity sorter used in the first embodiment of the present invention.

FIG. 6 is an overall process diagram showing a second embodiment of the present invention.

FIG. 7 is a side sectional view showing a main part of a grinding machine used in a second embodiment of the present invention.

8 is an end view on line AA in FIG. 7. FIG.

FIG. 9 is a cross-sectional view showing a partial cutaway of a main part of a pressure sorting machine used in a second embodiment of the present invention.

FIG. 10 is an overall process diagram showing a third embodiment of the present invention.

[Explanation of symbols]

51,52,51a, 52a Polishing machine 511,511a body 512, 512a Grinding processing member 75 baskets 6 Specific gravity sorter 6a Pressure sorter 7 spiral classifier B Asphalt block J gravel crushed stone M asphalt mixture N sand T asphalt

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B03B 1/00-13/06 B07B 1/00-15/00 B09B 5/00

Claims (14)

(57) [Claims] 1. A separation step of crushing asphalt lumps of asphalt waste material and generally separating asphalt from the aggregate constituents in the asphalt waste material, and a mixture of the aggregate constituent and asphalt produced by the separation step is used as an aggregate constituent. A method for regenerating aggregate from waste asphalt material having a separation step of separating into asphalt and the asphalt, wherein the separation step is performed by immersing the mixture in water to generate a water flow at least from the bottom to the top of the asphalt. A method of reclaiming aggregate from waste asphalt, characterized by separating the aggregate and aggregate components into upper and lower layers. 2. The method for regenerating aggregate from waste asphalt material according to claim 1, wherein the water flow from bottom to top is intermittent. 3. In the separating step, the mixture of the aggregate component and asphalt is placed in a water tank or a basket provided in the water tank, and a hole is provided at the bottom of the water tank or the basket provided in the water tank. 3. The aggregate is regenerated from the asphalt waste material according to claim 1 or 2, wherein water is introduced from the hole into a water tank or a basket provided in the water tank to generate a water flow from bottom to top. how to. 4. The method for reclaiming aggregate from waste asphalt material according to claim 3, wherein a valve element is arranged in the hole. 5. The water tank used in the separation step has an upper water tank in which a mixture of an aggregate component and asphalt is placed and a lower water tank which vibrates up and down, both of which are connected via a flexible member. The method for regenerating aggregate from waste asphalt material according to claim 3 or 4, wherein a water flow from bottom to top is generated in the water tank by vertically vibrating the water tank. 6. In the disengaging step, a rotating hollow body-shaped main body and a grinding machine equipped with a rod rod and / or a spherical grinding treatment member inside the main body are used, and the main body and the grinding treatment are performed.
Peeling of asphalt by grinding with parts
The method for reclaiming aggregate from waste asphalt material according to any one of claims 1 to 5, wherein 7. The method for regenerating an aggregate from waste asphalt according to claim 6, wherein a plurality of mining machines according to the size of the aggregate component are used in the releasing step. 8. The regrinding machine recycles aggregate from waste asphalt material according to claim 6 or 7, wherein the revolving hollow body main body is provided with grinding treatment members having different rotation directions. Method. 9. The method for regenerating aggregate from waste asphalt according to any one of claims 1 to 8, wherein in the separation step, a spiral classifier that separates aggregate components by rotation of rotary blades is used together. 10. A crushing method for crushing asphalt lumps of waste asphalt and containing crushed gravel stones with asphalt attached.
A crushing step of the object, and Migakuko by rotating the crushed material, as well as generally peeled asphalt adhering to the gravel crushed stone fraction, and Migakuko step of selecting a fine sand-asphalt particle, gravel crushed stone fraction And asphalt mixture
Process of separating crushed gravel from sand and fine sand
・ A sanding machine that has a separation step that is a step of separating sand from asphalt , and in the grinding step, a grinding machine equipped with rotating grinding body-shaped members having different rotation directions is used. A method of regenerating aggregate from asphalt waste material, which is characterized by: 11. A crushing method for crushing asphalt lumps of asphalt waste material and containing crushed gravel stones with asphalt attached
The crushing process to be the thing and the crushed products sorted by size,
Grinding by rotating the crushed material using multiple grinding machines
From the mixture of the gravel crushed stone and the asphalt, the asphalt that adheres to the gravel crushed stone is generally peeled off and the sand or asphalt with fine particles is selected.
The process of separating the crushed gravel and the fine sand / a
A method for reclaiming aggregate from waste asphalt material, which comprises a step of separating sand from the asphalt. 12. A crushing method for crushing asphalt lumps of asphalt waste material and containing crushed gravel stones with asphalt attached
A crushing step of the object, and Migakuko by rotating the crushed material, as well as generally peeled asphalt adhering to the gravel crushed stone fraction, and Migakuko step of selecting a fine sand-asphalt particle, gravel crushed stone fraction And asphalt mixture
Process of separating crushed gravel from sand and fine sand
・ Has a separation step of separating sand from asphalt , wherein in the separation step, a specific gravity sorter for separating by specific gravity and a spiral classifier for separating by rotation of rotary blades are used. A method of reclaiming aggregate from asphalt waste. 13. A crushing method for crushing asphalt lumps of asphalt waste materials and including crushed gravel stones with asphalt attached
A crushing step of the object, and Migakuko by rotating the crushed material, as well as generally peeled asphalt adhering to the gravel crushed stone fraction, and Migakuko step of selecting a fine sand-asphalt particle, gravel crushed stone fraction And asphalt mixture
Process of separating crushed gravel from sand and fine sand
・ Having a separation step that is a step of separating sand from asphalt , and using a specific gravity sorter that vibrates and separates by specific gravity in the separation step, and a spiral classifier that separates by rotation of rotary blades A method of regenerating aggregate from waste asphalt. 14. A crushing method for crushing asphalt lumps of asphalt waste material and including crushed gravel stones to which asphalt adheres.
A crushing step of the object, and Migakuko by rotating the crushed material, as well as generally peeled asphalt adhering to the gravel crushed stone fraction, and Migakuko step of selecting a fine sand-asphalt particle, gravel crushed stone fraction And asphalt mixture
Process of separating crushed gravel from sand and fine sand
・ Has a separation step of separating sand from asphalt , and in the separation step, a pressure sorter that separates by pressure and specific gravity, and a spiral classifier that separates by rotation of rotary blades are used. A method for regenerating aggregate from waste asphalt material, which is characterized by the following.