KR101447245B1 - Production Method and Equipment of Recycled Aggregate mixed with Furnace Slag Controlling it's Bulk Density and Weight - Google Patents

Abstract

The present invention relates to a method and a device for producing a recycled aggregate by mixing and pulverizing construction waste and furnace slag by controlling specific gravity and weight. In particular, a specific gravity measuring device, which detects the produced amount and specific gravity per hour of a secondarily pulverized recycled aggregate as electrical signals in order to be transmitted to a control unit, is installed at the bottom of a second crusher. A furnace slag supplying device, which automatically supplies furnace slag to a third crusher in which the recycled aggregate of a quantity required by the control unit is fed, is installed at the entrance of the third crusher. By means of the control unit, the specific gravity of the recycled aggregate detected through the specific gravity measuring device and the specific gravity of the recycled aggregate to be finally produced based on the produced amount thereof are compared to each other, so that the added amount of the furnace slag fed to obtain a desired specific gravity is calculated and the opening and closing rates of a gate in the furnace slag supplying device are automatically adjusted corresponding to the added amount of the furnace slag. Accordingly, a large quantity of secondary byproducts which are generated by the crushing, pulverizing, peeling, and debarking of an existing mechanical device can be reduced. Also, a high quality recycled aggregate can be produced using the different quality properties of the recycled aggregate and furnace slag which are byproducts, so that the quality of the recycled aggregate and the equability and production efficiency thereof as a product can be remarkably improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing recycled aggregate by weight mixing and crushing by controlling the specific gravity of construction waste and converter slag,

The present invention relates to a method and an apparatus for producing a recycled aggregate of desired quality by controlling the difference in specific gravity between construction waste and converter slag, mixing the same in a crusher, mixing and crushing them, and more specifically, In the process of producing recycled aggregate through the process, the converter slag having a high specific gravity, a constant value and a high strength, and a specific gravity of recycled aggregate having a low specific gravity and large fluctuation of its value and having foreign matters such as cement paste , The mixing ratio of the converter slag which has the specific gravity of the desired recycled aggregate can be automatically determined and the converter slag is transferred to the crusher using a device capable of carrying out quantitative conveyance and weighing, Separate foreign matter and add recycled aggregate with desired specific gravity. The present invention relates to method and apparatus for producing recycled aggregate by weight is mixed with crushed by the weight adjustment of the construction waste and converter slag invention so as to greatly improve the quality and uniformity and production efficiency of the product itself, of the recycled aggregates.

In order to promote the recycling of construction waste, Korea established the quality standard for recycled aggregate in Korea Industrial Standards (KS) in 2002 and the Ministry of Land, Transport and Maritime Affairs in August 2012 enacted the "Recycled aggregate quality standard" It is intended to manufacture recycled aggregates with high quality and to use them by application.

Construction wastes are mixed with various kinds of wastes and brought into the treatment plant. The wastes are sorted by crushing by various stages of crushers (typically first to third crushers) and by magnetic force, wind force, manpower, It is important to separate the cement paste and the foreign material from the surface of the recycled aggregate because the quality deteriorates.

Also, the biggest problem of recycled aggregate with cement paste and foreign matter is low specific gravity of 2.2 ~ 2.5 and high content of foreign matter of 3 ~ 10%. The cement concrete using the recycled aggregate having such properties is freeze- It can not be applied because of cracks. Also, even in the case of asphalt concrete, it is difficult to apply because the asphalt content is high and the durability is low.

Various methods have been proposed for removing the cement paste and foreign matter from the recycled aggregate and improving the specific gravity and the foreign matter content of the recycled aggregate, and these methods have been proposed for crushing, crushing, peeling and peeling These technologies have specific gravity and foreign matter improvement performance, but there is a limit to improve the quality to the desired quality standard and the recycled aggregate quality which fluctuates according to the characteristics of the waste can not be manufactured uniformly.

In addition, the slag, which is an industrial by-product generated in the steel making process, includes blast furnace slag coming out of the blast furnace and steel slag coming out of the steelmaking stage. In the steel making slag, there is a converter slag coming out of the converter. Double blast furnace slag has a low specific gravity, But the crushed converter slag has a specific gravity of about 3.5 to 3.7, which is very high, has a large number of rhombic angles, and is not only high in strength but also has a poor shape and is used as a slip resistant material This requirement is extremely limited, so separate treatment is required for large-scale recycling.

In this process, the converter slag is quenched in the steelmaking process, and the low-purity molten steel is used to produce the fine aggregate as a fine aggregate. However, the converter slag having the specific gravity of about 3.5 is very high, In addition, the workability is excellent but it is not applied much because there are disadvantages in obtaining the strength of the requirement.

On the other hand, the crushed converter slag may be mixed with soil or low-quality recycled aggregate to be recycled. In this case, however, mixed management and quality control are not carried out and the reclaimed slag is recycled only for landfilling and not recycled for high value- have.

Therefore, in order to use the converter slag by crushing for high value-added applications, it is necessary to develop a technology that utilizes the inherent characteristics of the slag.

1. Korean Registered Patent Publication No. 10-0894876 (April 17, 2009) 2. Korean Registered Patent No. 10-0712077 (April 20, 2007) 3. Korean Registered Patent No. 10-0804785 (February 12, 2008) 4. Korean Patent Registration No. 10-0814086 (Mar. 10, 2008)

DISCLOSURE OF THE INVENTION The present invention has been made in order to overcome the above problems of the related art, and it is an object of the present invention to provide a method of measuring the specific gravity and production amount of recycled aggregate in the field and automatically calculating a mixing amount of converter slag using these values, This method is used to produce a recycled aggregate having a desired specific gravity by mixing a small amount of converter slag with a recycled aggregate and crushing it with recycled aggregate. In addition, separating the cement paste and foreign matter from the recycled aggregate, It is possible not only to reduce a large amount of secondary byproducts generated by crushing, crushing, peeling and peeling of the existing machinery, but also to utilize different quality characteristics of recycled aggregate and converter slag, which are byproducts Quality recycled aggregate can be manufactured, and the quality of the recycled aggregate itself and the product To provide a recycled aggregate production method and apparatus according to the weight of mixture and crushed by the weight uniformity and control of construction waste and converter slags, which can dramatically improve the production efficiency, it is an object.

According to an aspect of the present invention, there is provided an apparatus for collecting construction waste, comprising: a screen for removing soil and sand from collected construction waste; A first crusher for primarily crushing waste concrete; A foreign matter sorting device for sorting and removing various foreign substances contained in the waste concrete which has been crushed by the method of manpower, magnetic force, wind power and washing; A second crusher for secondarily crushing waste concrete having foreign matter selected therefrom by a recycled aggregate having a predetermined particle size; A float sorting device for removing floating matters contained in the recycled aggregate using water; And a third crusher for crushing the recycled aggregate to a desired particle size, the apparatus comprising: a first crusher for crushing the recycled aggregate at a desired particle size; A converter for supplying a converter slag to an inlet of the third crusher is provided to automatically feed the converter slag to the third crusher into which the recycled aggregate is charged by an amount required by the control unit , The control unit compares the specific gravity of the recycled aggregate detected through the specific gravity measuring device and the specific gravity of the recycled aggregate to be finally produced relative to the production amount to calculate the input amount of the transferred slag to obtain a desired specific gravity, Thereby automatically controlling the gate opening / closing amount of the converter slag supply device .

At this time, the first to third crushers include a jaw crusher, a cone crusher, an ammunition crusher, a roll crusher, and a hammer crusher.

The specific gravity measuring apparatus includes a specific gravity measuring container having a hopper shape and a bottom opening and having a gate whose opening and closing are controlled by a control unit; A counter installed in the specific gravity measuring container for sensing the input of the recycled aggregate and measuring the time of the recycled aggregate; A weighing measuring load cell installed at the bottom of the gate of the non-measuring container to measure the weight of the recycled aggregate including the container and deliver it to the control unit; A hydraulic or pneumatic cylinder horizontally installed on one side of the specific gravity measurement container to generate a power required to push the specific gravity measurement container toward the recycled aggregate input port side or to extract it from the input port side; A container top surface which is provided at a position spaced a certain distance from the inlet of the specific gravity measurement container and is pushed up to the top of the specific gravity measurement container in a flat manner so that the amount of the circulating aggregate contained in the specific gravity measurement container has a predetermined volume, A flat member; And a guide beam and a plurality of rollers provided on the bottom of the container to guide movement of the container.

According to an aspect of the present invention, there is provided a method of removing contaminants, the method comprising the steps of: removing soil and sand from a collected construction waste using a screen; Crushing waste concrete through a first crusher to separate foreign matter; A step of removing various foreign substances contained in the waste concrete which is primarily crushed by a method such as gravity, magnetic force, wind force and washing; Separating the waste concrete by crushing the waste concrete with the predetermined particle size into the circulating aggregate through the second crusher; Removing the suspended matters contained in the recycled aggregate using water; And crushing the recycled aggregate to a desired particle size through the third crusher, wherein the production proportion of the desired recycled aggregate and the specific gravity are measured through the key input unit connected to the input terminal of the control unit Frequency and the specific gravity of the converter slag, inputting the weight of the recycled aggregate when the specific gravity measuring container is loaded in a mountain shape through a load cell provided in the specific gravity measuring device, and inputting the weight; A step of injecting a converter slag having a high specific gravity and a constant value and a high-strength high-power angle into a converter slag supply device installed at an inlet of the third crusher; A step of detecting a specific gravity of the recycled aggregate fed into the third crusher and a production amount per hour by using a specific gravity measuring device installed at the bottom of the second crusher in the control unit; The specific gravity of the recycled aggregate detected through the specific gravity measuring device and the specific gravity of the recycled aggregate to be produced are compared with each other to produce a desired specific gravity, and the input amount of the converter slag is calculated and the input amount of the converter slag is calculated A step of opening the gate of the converter slag supply device to adjust the specific gravity to be produced by injecting the converter slag into the third crusher into which the secondary crushed recycled aggregate is charged; And separating the foreign materials by mixing and crushing the circulating aggregate and the converter slag through the third crusher.

At this time, the desired specific gravity of the recycled aggregate calculated by the controller is determined by the following equation.

As described above, according to the method and apparatus for manufacturing recycled aggregate by weight mixing and crushing by controlling the specific gravity of the construction waste and converter slag of the present invention, it is possible to measure the specific gravity and production amount of the recycled aggregate in the field, A small amount of converter slag is transported to a crusher by using a device capable of automatically calculating a mixing amount of the converter slag and transporting the metered amount to the crusher, and the resulting slag is mixed and crushed with the recycled aggregate to produce a recycled aggregate having a desired specific gravity, By separating the cement paste and foreign matter attached to the aggregate and making it possible to produce recycled aggregate according to the set quality standard, it is possible to reduce a large amount of secondary byproducts generated by crushing, crushing, peeling and peeling of the existing machinery In addition, by using different quality characteristics of recycled aggregate and converter slag, Quality recycled aggregate can be produced, and the quality of the recycled aggregate itself, uniformity as a product, and production efficiency can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic block diagram of an apparatus according to the present invention. FIG.
2 is a schematic cross-sectional view of a specific gravity measuring device of the present invention.
3 is a process diagram for explaining the method of the present invention.

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

Fig. 1 shows a schematic block diagram of the apparatus of the present invention. Fig. 2 shows a schematic cross-sectional view of a specific gravity measuring apparatus of the present invention, and Fig. 3 shows a process chart for explaining the method of the present invention.

According to the present invention,

A screen (1) for removing soil and sand from the collected construction waste; A first crusher (2) for crushing waste concrete; A foreign matter sorting device 3 for sorting and removing various foreign substances contained in the waste concrete which has been crushed first by the method of attraction force, magnetic force, wind force and washing; A second crusher (4) for crushing the waste concrete having foreign matter selected by crushing the waste concrete with the circulating aggregate so as to have a predetermined particle size; A float sorting device 5 for removing floating matters contained in the recycled aggregate using water; And a third crusher (6) for crushing the recycled aggregate to a desired particle size finally, the apparatus comprising:

A load cell, a hydraulic or pneumatic cylinder, etc. having a predetermined volume at the bottom of the second crusher 4, and the production amount and specific gravity per hour of the secondary crushed recycled aggregate are detected by an electrical signal and transmitted to the control unit 7 A specific gravity measuring device 8 is installed,

A gate 92 is provided on the bottom surface of the hopper 91 having a predetermined volume at the entrance of the third crusher 6 and a circulation aggregate is fed in an amount required by the control section 7 3 converter slag supply device 9 for automatically supplying the slag to the crusher 6,

The control unit 7 compares the specific gravity of the recycled aggregate detected through the specific gravity measuring device 8 with the specific gravity of the recycled aggregate to be finally produced relative to the amount of produced recycled aggregate to calculate the input amount of the transferred slag, The amount of opening and closing of the gate 92 of the converter slag supply device 9 is automatically adjusted in accordance with the calculated amount.

At this time, the first to third crushers 2, 4, and 6 include a jaw crusher, a cone crusher, an ammunition crusher, a roll crusher, and a hammer crusher.

Further, the specific gravity measuring device 8

A specific gravity measuring container 82 having a hopper shape and provided at a bottom opening thereof with a gate 83 whose opening and closing is controlled by a control unit 7;

A counter 84 installed in the specific gravity measuring container 82 to sense the input of the recycled aggregate and to measure the time of the recycled aggregate;

A weighing load cell 85 installed at the bottom of the gate 83 of the specific gravity measuring container 82 for measuring the weight of the circulating aggregate including the container and delivering it to the control unit 7;

A hydraulic or pneumatic cylinder (86) horizontally installed on one side of the specific gravity measurement container (82) to generate power necessary to push or pull the specific gravity measurement container (82) toward the recycled aggregate input port side or to extract it from the input port side;

The recycled aggregate material stacked up to the upper portion of the specific gravity measuring container 82 is pushed flat and installed in the specific gravity measuring container 82 at a position spaced a certain distance from the loading port side in the upper portion of the specific gravity measuring container 82, A container upper surface flat member (87) having a predetermined volume of aggregate;

And a guide beam 88 and a plurality of rollers 89 installed at the bottom of the specific gravity measuring container 82 to guide the movement of the container.

On the other hand,

Removing the soil and sand using the screen (1) from the collected construction waste; Crushing waste concrete through the first crusher (2) to separate foreign matter; A step of removing various foreign substances contained in the waste concrete that has been crushed first by a method such as gravity, magnetic force, wind force and washing; Crushing waste concrete with a predetermined particle size through a second crusher (4) with a circulating aggregate to separate foreign matter; Removing the suspended matters contained in the recycled aggregate using water; And crushing the recycled aggregate to a desired particle size finally through the third crusher (6), the method comprising the steps of:

The specific gravity of the recycled aggregate, the specific gravity measurement frequency and the specific gravity of the converter slag are input through the key input unit 71 connected to the input terminal of the control unit 7 and the load cell 85 provided in the specific gravity measuring device 8 A step of preliminarily inputting the weight of the recycled aggregate when the specific gravity measuring container is loaded in a mountain shape;

A step of inputting a converter slag having a high specific gravity and a constant value thereof and a high-intensity high-frequency power to a converter slag feeder 9 installed at an inlet of the third crusher 6;

A step of detecting a specific gravity of the recycled aggregate fed into the third crusher (6) and a production amount per hour by using the specific gravity measuring device (8) installed at the bottom of the second crusher (4)

The specific gravity of the recycled aggregate detected through the specific gravity measuring device 8 and the specific gravity of the recycled aggregate to be finally produced are compared with each other to produce a desired specific gravity, and the input amount of the converter slag is calculated, Opening the gate of the converter slag supply device 9 in correspondence with the value of the first crusher 6 and adjusting the specific gravity to be produced by injecting the converter slag into the third crusher 6 into which the secondary crushed recycled aggregate is charged;

And separating the foreign materials by mixing and crushing the circulating aggregate and the converter slag through the third crusher (6).

At this time, the desired specific gravity of the final recycled aggregate calculated by the controller 7 is determined by the following equation.

Hereinafter, the operation and effect of the present invention will be described.

First, the apparatus of the present invention comprises a screen 1, a known crusher 2, a foreign matter separator 3, a second crusher 4, a float discriminating device 5 and a third crusher 6, A specific gravity measuring device 8 is installed at the bottom of the second crusher 4 and a converter slag feeding device 9 is installed at the entrance of the third crusher 6 The control unit 7 compares the specific gravity of the recycled aggregate detected through the specific gravity measuring device 8 with the specific gravity of the recycled aggregate to be finally produced relative to the production amount, The main technical component is that the converter slag, which is calculated to the weight of the recycled aggregate, is automatically input.

At this time, the converter slag supplied to the third crusher 6 has many awakening angles and its strength is high. Therefore, it is mixed with the circulating aggregate material in the third crusher 6, and various kinds of materials attached to the circulating aggregate due to friction, Separation of foreign matter is another important technical factor.

Meanwhile, the screen 1 of the reclaimed aggregate production apparatus using the known construction waste performs a function of removing soil and sand from the collected construction waste, and the first crusher 2 is a waste concrete To be crushed to have a predetermined particle diameter.

The foreign matter sorting device 3 performs a function of sorting and removing various foreign substances contained in the waste concrete that has been crushed first by using a method such as gravity, magnetic force, wind force, and washing, and the second crusher 4, The waste concrete having the predetermined particle size is crushed to have a predetermined secondary particle size by the recycled aggregate.

The flocculant sorter 5 functions to remove floating matters contained in the recycled aggregate which is secondarily crushed by using water, and the third crusher 6 basically has a function of collecting the circulating aggregate Shredding function.

At this time, the first to third crushers 2, 4, and 6 select an appropriate crusher in consideration of the shape and particles of the construction waste in the crusher, the cone crusher, the amphic crusher, the roll crusher and the hammer crusher You can install it.

The specific gravity measuring device 8 among the specific gravity measuring device 8 and the converter slag supplying device 9 provided in the apparatus of the present invention includes a specific gravity measuring container 82 having a predetermined volume and a load cell 85 ), A hydraulic or pneumatic cylinder 86 and the like, and is installed on a plurality of columns 81 at the bottom of the second crusher 4 so that the yield per hour of the secondarily crushed recycled aggregate through the second crusher 4 And the specific gravity are detected by an electrical signal and transmitted to the control unit 7.

At this time, the specific gravity measuring device 8 is operated at a predetermined frequency to accurately measure the specific gravity of the second crusher 4, which is continuously supplied with different specific gravity, at a predetermined time interval, A gate 83 opened and closed by the control unit 7 is provided at the bottom of the specific gravity measuring container 82 having a normal hopper shape such as the one shown in FIG. 2, and the introduction of the circulating aggregate is detected in the container, And a load cell 85 for weight measurement is provided on the bottom of the gate 83. The container 82 is provided with a counter 84 for pushing the container toward the recycled aggregate input port side, A hydraulic or pneumatic cylinder 86 for generating a power required for withdrawal of the container 82 is provided at a position spaced a predetermined distance from the inlet port side of the container 82, And a container upper surface flat member 87 for allowing the amount of circulating aggregate contained in the container to have a predetermined volume is provided on the bottom of the container 82. A guide A beam 88, a plurality of rollers 89, and the like.

The converter slag supply device 9 has a structure in which a gate 92 is provided on the bottom surface of the hopper 91 having a predetermined volume and is installed at the inlet of the third crusher 6 to continuously supply the converter slag The gate 92 is opened in response to the output signal of the control unit 7 and the conductive slag is automatically supplied to the third crusher 6 by an amount required by the control unit 7.

The controller 7, which performs the overall control function for the apparatus of the present invention having the above-described configuration, calculates the specific gravity and the production amount of the recycled aggregate detected through the specific gravity measuring device 8 at a predetermined time interval, After comparing the specific gravity of the recycled aggregate and the specific gravity of the recycled aggregate to be finally produced relative to the amount of produced recycled aggregate, how much the converter slag is put into the recycled aggregate currently being fed into the third crusher (6) The amount of opening and closing of the gate 92 of the converter slag supply device 9 is automatically adjusted in accordance with the calculated amount.

At this time, the installation positions of the specific gravity measuring device 8 and the converter slag feeder 9 are not limited to the bottom of the second crusher 4 and the inlet of the third crusher 6 as described above, Therefore, it may be installed at the entrance of the second crusher 4.

As shown in FIG. 3, the method of the present invention performed through the apparatus of the present invention as described above performs a process of removing soil and sand from the collected construction waste using the screen 1, A process of removing various foreign substances contained in the waste concrete subjected to primary crushing by a method such as gravity, magnetic force, wind force, and washing, and a process of removing the foreign matter from the second crusher 4 A step of separating foreign matter by crushing waste concrete with a predetermined particle size through a recycled aggregate, a step of removing suspended matters contained in the recycled aggregate by using water, and a step of finely crushing waste concrete with a desired particle size And the process of crushing the recycled aggregate is performed in the same manner as in the prior art.

However, prior to driving the apparatus of the present invention, the production proportion of the desired recycled aggregate, the specific gravity measurement frequency and the specific gravity of the converter slag are inputted through the key input unit 71 connected to the input terminal of the control unit 7 And a weight value when the recycled aggregate is loaded in the specific gravity measurement container 82 through the load cell 85 provided in the specific gravity measuring device 8 is further performed.

Further, as described above, there is also a step of inputting the converter slag having a high specific gravity and a constant value thereof and having an acute angle with high strength in the converter slag feeder 9 provided at the inlet of the third crusher 6 .

Thereafter, when the recycled aggregate manufacturing apparatus to which the method of the present invention is applied is operated, the control unit 7 operates the above-described various apparatuses, and the construction waste is manufactured into a cyclic aggregate having desired grain size and specific gravity, The specific gravity measuring device 8 installed at the bottom of the crusher 4 is operated to detect the specific gravity of the recycled aggregate fed into the third crusher 6 and the production amount per hour.

Then, the specific gravity of the recycled aggregate detected through the specific gravity measuring device 8 and the specific gravity of the recycled aggregate to be produced are finally compared with each other, and the input amount of the converter slag is calculated to obtain a desired specific gravity, The gate of the converter slag feeder 9 is opened corresponding to the calculated value to feed the converter slag into the third crusher 6 into which the secondary crushed aggregate is fed.

Therefore, in the third crusher 6, the recycled aggregate having a specific gravity and the converter slag having a predetermined specific gravity are mixed and crushed, and the recycled aggregate having a desired specific gravity is automatically produced.

Since the specific gravity of the converter slag is constant, the value of the specific gravity of the converter slag is determined by the laboratory or the manufacturer's suggested value is applied. Since the specific gravity of the recycled aggregate is very variable, .

In addition, since the amount of the recycled aggregate is continuously changed per hour, the production amount of the recycled aggregate is measured at a certain frequency, and the method of supplying the converter slag to each frequency is determined.

As a method of determining the specific gravity and the production amount of the recycled aggregate in the field, the specific gravity measurement frequency (minute, second) and the desired recycled aggregate specific gravity value through the key input unit 71 connected to the input terminal of the control unit 7 The control unit 7 activates the hydraulic or pneumatic cylinder 86 provided in the specific gravity measuring device 8 according to the frequency of the measurement set in the above manner so that the field specific gravity measuring container 82 When the circulating aggregate starts to be filled in the non-specific gravity measuring container, the counter 84 installed in the container senses the input of the circulating aggregate, and at the same time, (t ₁ ).

When the weight of the dried aggregate in the specific gravity measuring container 82 becomes the setting value of the weight detected by the load cell 85, the time t ₂ at that time is fed to the counter 84 And the specific gravity measuring container 82 is withdrawn to the rear side by using the hydraulic or pneumatic cylinder 86.

At this time, the control unit 7 divides the weight value of the recycled aggregate set at the state value loaded in a mountain shape on the load cell 85 by the total injection time (t ₂ -t ₁ ) of the recycled aggregate, Respectively.

When the specific gravity measurement container 82 is moved backward as described above, the container top surface flat member 87 shaves or pushes up the circulating aggregate loaded in a mountain shape to the upper portion of the specific gravity measurement container, And the weight W at this time is read using the load cell 85.

Then, the control unit obtains the specific gravity (G ₁ ) of the recycled aggregate by dividing the actual weight of the recycled aggregate by the volume of the vessel for measuring the specific gravity. The specific gravity of the recycled aggregate and the yield of the recycled aggregate are calculated, Lt; RTI ID = 0.0 > constantly < / RTI >

At this time, the desired specific gravity of the final recycled aggregate calculated by the controller 7 is determined by the following equation.

When the specific gravity of the final recycled aggregate, the specific gravity of the recycled aggregate itself, and the specific gravity of the converter slag (laboratory value or producer provided value) are substituted into the above formula, the recycled aggregate weight ratio (%) + converter slag weight ratio (% Considering the production per unit time, the amount of converter slag to be supplied per unit time can be obtained.

When the feed weight per unit time of the thus obtained converter slag is automatically supplied into the third crusher 6 into which the recycled aggregate having a predetermined specific gravity is fed by using the belt feeder of the converter slag, The aggregate and the converter slag are mixed and the recycled aggregate having the desired specific gravity is automatically produced.

At this time, the converter slag has abrasion, crushing and peeling due to the mixing of the circulating aggregate and the converter slag in the third crusher 6 due to the high intensity of the opaque angle, and the cement paste and the foreign matter are peeled off, But also has an effect of improving the grain shape by mutual friction and crushing action between the diagonal angle of the converter slag and the opaque angle of the recycled aggregate.

By applying the present invention having the constitution and process, a large amount of secondary by-products generated by crushing, crushing, peeling and peeling of the existing mechanical device can be reduced, and besides, byproducts of recycled aggregate and converter slag The quality of the recycled aggregate itself, the uniformity as a product, and the production efficiency can be greatly improved.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Which will be apparent to those skilled in the art.

1: Screen
2: First crusher
3: Foreign material selector
4: Second crusher
5: Float selector
6: Third crusher
7: control unit 71: key input unit
8: Specific gravity measuring device
81: Column 82: Specific gravity container
83: gate 84: counter
85: Load cell for weight measurement 86: Hydraulic or pneumatic cylinder
87: container upper surface flat member 88: guide beam
89: Roller
9: converter slag feeder
91: hopper 92: gate

Claims (4)

A screen for removing soil and sand from the collected construction waste; A first crusher for primarily crushing waste concrete; A foreign matter sorting device for sorting and removing various foreign substances contained in the waste concrete which has been crushed by the method of manpower, magnetic force, wind power and washing; A second crusher for secondarily crushing waste concrete having foreign matter selected therefrom by a recycled aggregate having a predetermined particle size; A float sorting device for removing floating matters contained in the recycled aggregate using water; And a third crusher for crushing the recycled aggregate to a desired particle size finally, the apparatus comprising:
A specific gravity measuring device for detecting a production amount and a specific gravity per hour of the secondary crushed recycled aggregate on the bottom of the second crusher by an electrical signal,
A converter slag supply device is provided at an inlet of the third crusher to automatically feed the converter slag to a third crusher into which the recycled aggregate is charged by an amount required by the controller,
The control unit compares the specific gravity of the recycled aggregate detected through the specific gravity measuring device and the specific gravity of the recycled aggregate to be finally produced relative to the amount of production to calculate the input amount of the transferred slag so as to have a desired specific gravity, Wherein the amount of gate opening and closing of the converter slag supply device is automatically controlled. The apparatus for producing recycled aggregate by weight mixing and crushing by controlling the specific gravity of construction waste and converter slag.
The method according to claim 1,
The specific gravity measuring device includes:
A specific volume measuring vessel having a hopper shape and a bottom opening provided with a gate whose opening and closing is controlled by a control unit;
A counter installed in the specific gravity measuring container for sensing the input of the recycled aggregate and measuring the time of the recycled aggregate;
A weighing measuring load cell installed at the bottom of the gate of the non-measuring container to measure the weight of the recycled aggregate including the container and deliver it to the control unit;
A hydraulic or pneumatic cylinder horizontally installed on one side of the specific gravity measurement container to generate a power required to push the specific gravity measurement container toward the recycled aggregate input port side or to extract it from the input port side;
A container top surface which is provided at a position spaced a certain distance from the inlet of the specific gravity measurement container and is pushed up to the top of the specific gravity measurement container in a flat manner so that the amount of the circulating aggregate contained in the specific gravity measurement container has a predetermined volume, A flat member;
And a guide beam and a plurality of rollers provided at the bottom of the vessel for guiding the movement of the vessel, and a plurality of rollers. The apparatus for producing circulating aggregate by weight mixing and crushing by controlling the specific gravity of the construction waste and the converter slag.
Removing the soil and sand from the collected construction waste using a screen; Crushing waste concrete through a first crusher to separate foreign matter; A step of removing various foreign substances contained in the waste concrete that has been crushed first by a method such as gravity, magnetic force, wind force and washing; Separating the waste concrete by crushing the waste concrete with the predetermined particle size into the circulating aggregate through the second crusher; Removing the suspended matters contained in the recycled aggregate using water; And crushing the recycled aggregate to a desired particle size through a third crusher, the method comprising:
The specific gravity of the recycled aggregate, the specific gravity measurement frequency, and the specific gravity of the converter slag are inputted through the key input unit connected to the input terminal of the control unit, and when the specific gravity measurement container is loaded in the mountain shape through the load cell provided in the specific gravity measuring device A step of preliminarily inputting the weight of the recycled aggregate;
Introducing a converter slag having a high specific gravity and a constant value and an acute angle with a high intensity into a converter slag feeder installed at an inlet of the third crusher;
A step of detecting a specific gravity of the recycled aggregate fed into the third crusher and a production amount per hour by using a specific gravity measuring device installed at the bottom of the second crusher in the control unit;
The specific gravity of the recycled aggregate detected through the specific gravity measuring device and the specific gravity of the recycled aggregate to be produced are compared with each other to produce a desired specific gravity, and the input amount of the converter slag is calculated and the input amount of the converter slag is calculated A step of opening the gate of the converter slag supply device to input the converter slag into the third crusher into which the secondary crushed recycled aggregate is charged;
And a step of mixing and separating the circulating aggregate and the converter slag through the third crusher to separate the foreign materials. The method of manufacturing the recycled aggregate by weight mixing and crushing by controlling the specific gravity of the construction waste and the converter slag.
The method of claim 3,
Wherein the desired specific gravity of the recycled aggregate calculated by the controller is determined by the following equation: < EMI ID = 1.0 >

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