JP5892143B2 - Solidified slag manufacturing apparatus, concrete coarse aggregate manufacturing apparatus, solidified slag manufacturing method, concrete coarse aggregate manufacturing method - Google Patents

Description

  The present invention provides a solidified slag manufacturing apparatus that solidifies molten slag (hereinafter referred to as molten slag) in a metal mold and discharges the solidified slag (hereinafter referred to as solidified slag) from the mold for each round of the apparatus. And a coarse aggregate production apparatus for concrete using the solidified slag production apparatus, a solidification slag production method using the solidification slag production apparatus, and a concrete coarse aggregate production method using the coarse aggregate production apparatus About.

For example, Patent Document 1 discloses a solidified slag manufacturing apparatus that solidifies in a metal mold and discharges the solidified slag from the mold.
In Patent Document 1, the solidified slag produced by the solidified slag production device is transported to another place by a shovel, crushed by a crushing device, sorted by a classifier, and again crushed to be classified into 5 to 20 mm. (See paragraphs 27 and 28 of Patent Document 1).

  Moreover, the solidification slag manufacturing apparatus disclosed in Patent Document 1 connects a plurality of molds in an endless manner, and after pouring molten slag into a mold on one end of the endless shape, linearly reaches the other end of the endless shape. It is moved, the mold is inverted at the other end, the solidified slag is discharged from the mold, and the mold in the inverted state is linearly moved to the one end side and returned.

JP 2004-277191 A

  In the conventional solidified slag manufacturing apparatus, the solidified slag solidified in the mold is crushed in a subsequent process, but crushing is not fully considered in the stage of solidified slag production. Therefore, for example, the process for crushing the solidified slag to form a coarse aggregate for concrete is not rational, and there is a problem that the crushing efficiency and yield of the solidified slag are poor.

Moreover, the solidification slag manufacturing apparatus used in Patent Document 1 connects a plurality of molds in an endless manner, and after flowing molten slag into a mold on one end side of an endless shape, linearly extends to the other end of the endless shape. There are also the following problems.
In an apparatus that connects a plurality of molds linearly and in an endless manner, the going process and the returning process have the same length, so the molten slag is poured into the mold and moved (the going process), and the solidification slag is reduced. The time required for discharging and moving the mold in the empty state (return process) is the same. The time for pouring and moving the molten slag into the mold is the time required to solidify the molten slag, and the number of connected molds and the moving speed are determined based on this time. For this reason, the moving time after reversing the mold is wasted, and the production efficiency of the solidified slag is deteriorated. As a result, the production efficiency of the concrete coarse aggregate is deteriorated.
Also, when trying to increase the moving speed, it is necessary to increase the number of connected molds in order to secure the solidification time, and it is necessary to suspend the molds at a long distance, the structure of the apparatus is complicated, and the equipment cost becomes large. In addition, there is a problem that the operation cost such as driving electric power becomes large.

  The present invention has been made to solve the above-described problems, and is a solidified slag production device capable of producing a solidified slag excellent in crushing efficiency and yield, and a coarse bone for concrete using the solidified slag production device. It aims at obtaining the manufacturing method of the concrete coarse aggregate using the manufacturing apparatus of the material, the solidification slag manufacturing method using the said solidification slag manufacturing apparatus, and the said coarse aggregate manufacturing apparatus for concrete.

(1) A solidified slag manufacturing apparatus according to the present invention includes a plurality of metal molds having recessed portions into which molten slag is poured, and a solidified slag manufacturing apparatus for manufacturing solidified slag by pouring molten slag into the recessed portions. Because
A convex strip having a height of 5 mm or more for forming a groove in the solidified slag is provided on the bottom surface of the mold.

(2) Moreover, in the thing as described in said (1), in the cross-sectional shape orthogonal to an axis line, the said protruding item | line part is a shape shrink | contracted toward upper direction, It is characterized by the above-mentioned.

(3) Further, in the above (1) or (2), the corners of the upper side and the lower side of the ridge are provided with rounds.

(4) Further, in any of the above (1) to (3), the ridges are arranged in a lattice shape, and the size of the lattice is set so that the length of the diagonal line is 200 mm or less. It is characterized by being set to.

(5) Moreover, in the thing in any one of said (1) thru | or (3), the said protruding item | line part is arrange | positioned at a grid | lattice form, and the length of a diagonal becomes 10-20 mm in the magnitude | size of the grid | lattice. It is characterized by setting as follows.

(6) Further, in any of the above (1) to (5), the ridges are arranged in a lattice shape and flat so that the ridges do not continue at the intersection of the ridges. This is characterized in that a portion is provided.

(7) Further, in any of the above-described (1) to (6), an operation of continuously manufacturing the solidified slag by supporting the mold so as to be able to move around and pouring molten slag into the recessed portion. It is characterized by the following.

(8) Further, in the above-described (7), it is provided with an orbital movement mechanism that orbits in the horizontal direction in a state where the plurality of molds are supported close to each other.
The circulatory moving mechanism moves the mold in the circulatory direction while holding the molten slag poured in the recess during one round of the apparatus, and air-cooled moving part for cooling and solidifying the molten slag by air, and the mold The reversing discharge part for discharging the solidified slag by reversing so that the recessed part is directed downward, the reversing moving part for moving the reversed mold in the reversed state, and the recessed part above the reversing mold. And a re-inversion unit for re-inversion so as to be suitable for the above.

(9) Further, in the above-described (8), the length (angle) occupied by the air-cooled moving part in one round of the circular movement mechanism is ½ (180 degrees) of the total length of the circular orbit (full angle 360 degrees). More than 3/4 (270 degrees).

(10) The method for producing a solidified slag according to the present invention is characterized in that the solidified slag is produced using the solidified slag producing apparatus according to any one of the above (1) to (9).

(11) An apparatus for producing a coarse aggregate for concrete according to the present invention uses a solidified slag production apparatus according to any one of (1) to (9) above and a solidified slag produced by the solidification slag production apparatus. A first crushing apparatus that crushes the solidified slag by dropping from the height of the first crushing apparatus, a second crushing apparatus that comprises an impact crushing apparatus that crushes the solidified slag of a predetermined shape or less roughly crushed by the first classifying apparatus, A second classifying device for classifying the solidified slag crushed by the second crushing device into 5 to 20 mm is provided.

(12) A method for producing a coarse aggregate for concrete according to the present invention is characterized by producing a coarse aggregate for concrete using the coarse aggregate production apparatus according to (11) above. is there.

  In the present invention, a groove portion is formed in the solidified slag by providing a protruding strip portion having a height of 5 mm or more for forming the groove portion in the solidified slag on the bottom surface of the mold into which the molten slag is poured. Can be roughly crushed into a desired shape when it is discharged from the mold and dropped. For example, when solidified slag is used as a raw material for coarse aggregate for concrete, crushing with an impact crushing device is efficient and yield. Can be done well.

It is explanatory drawing of the solidification slag manufacturing apparatus which concerns on one embodiment of this invention. It is explanatory drawing explaining a part of solidification slag manufacturing apparatus shown in FIG. 1 in detail. It is explanatory drawing explaining an example of arrangement | positioning of the protruding item | line part provided in the casting_mold | template in the solidification slag manufacturing apparatus which concerns on one embodiment of this invention. FIG. 4 is an end view taken along the line AA in FIG. 3. It is explanatory drawing of the solidification slag manufactured by the solidification slag manufacturing apparatus which concerns on one embodiment of this invention. It is sectional drawing which follows the arrow BB line in FIG. It is explanatory drawing of the other aspect of the protruding item | line part provided in the casting_mold | template of the solidification slag manufacturing apparatus which concerns on one embodiment of this invention. It is explanatory drawing explaining the other example of arrangement | positioning of the protruding item | line part provided in the casting_mold | template in the solidification slag manufacturing apparatus which concerns on one embodiment of this invention. It is explanatory drawing explaining arrangement | positioning of each part of the rotation moving mechanism in the solidification slag manufacturing apparatus shown in FIG. It is explanatory drawing explaining the other aspect of the solidification slag manufacturing apparatus which comprises the coarse aggregate manufacturing apparatus for concrete which concerns on one embodiment of this invention. It is explanatory drawing explaining the whole structure of the coarse aggregate manufacturing apparatus for concrete which concerns on other embodiment of this invention. It is a photograph for demonstrating the natural stone material used for the experiment which confirms the effect of this invention. It is explanatory drawing of the other example of the protruding item | line part provided in the casting_mold | template in the solidification slag manufacturing apparatus which concerns on one embodiment of this invention. It is an enlarged view of the part enclosed with the broken line of FIG. It is explanatory drawing explaining the relationship between the protruding item | line part and flat part in the other example of the protruding item | line part shown in FIG. It is CC sectional view taken on the line of FIG. It is explanatory drawing of the other aspect of the shape of the front-end | tip part of the protruding item | line part shown in FIG.

[Embodiment 1]
An apparatus for producing solidified slag according to an embodiment of the present invention supports a plurality of metal molds having recessed portions into which molten slag is poured so as to be capable of rotating, and the molten slag is poured into the recessed portions in one round of the device. A solidified slag producing apparatus for continuously producing the solidified slag by rotating the operation for each round, and providing a protrusion on the bottom surface of the mold for forming a groove in the solidified slag. It is characterized by that.
Hereinafter, each component will be described in detail with reference to the drawings.

As shown in FIG. 1, the solidification slag production apparatus is a device having an orbiting movement mechanism 7 that horizontally moves in a state where a plurality of molds 5 are brought close to each other and supported (manufacturing horizontal circulation type solidification slag production). The apparatus 1) may be used, or as shown in FIG. 10, an apparatus (an endless solidified slag manufacturing apparatus 31) in which a plurality of molds 39 are linearly connected endlessly may be used.
Below, the horizontal circulation type solidification slag manufacturing apparatus 1 is demonstrated including the characteristics of the casting_mold | template 5, and the structure of the endless type solidification slag manufacturing apparatus 31 is demonstrated after that.

<Horizontal revolving solidified slag production equipment>
As shown in FIG. 1, the horizontal revolving solidified slag manufacturing apparatus 1 supports a plurality of metal molds 5 having recessed portions 5a (see FIG. 2) into which the molten slag 3 is poured so as to be reciprocally movable. An apparatus for continuously producing the solidified slag by pouring the molten slag 3 into the recessed portion 5a during the circumference, and continuously rotating the operation for each round,
A circular movement mechanism 7 is provided that moves in a horizontal direction while supporting a plurality of molds 5 close to each other, and the circular movement mechanism 7 holds the molten slag 3 that has been poured between the circumferences of the apparatus 1 in the concave portion 5a. In this state, the air-cooling moving part 9 that moves the mold 5 in the circumferential direction to air-cool and solidify, and the reversing discharge part 11 that inverts the mold 5 so that the recessed part 5a faces downward to discharge the solidified slag, An inversion moving unit 13 that moves the inverted mold 5 in an inverted state and a reinversion unit 15 that reinverts the inverted mold 5 so that the recessed portion 5a faces upward are provided. The re-inversion moving part 17 is provided for moving the re-inverted mold 5 to a portion into which the molten slag 3 is poured as required.
In addition, the horizontal circulation type solidification slag manufacturing apparatus 1 is good to install the rod 20 so that the molten slag 3 may be easily poured into the mold 5.
Hereinafter, each configuration will be described in detail.

〔template〕
The mold 5 has a shallow concave portion 5a into which the molten slag 3 is poured. More specifically, as shown in FIG. 2, the mold 5 is preferably a metal container having a substantially trapezoidal recessed portion 5a. As shown in FIG. 1, the mold 5 of the present embodiment is arranged close to each other so that a plurality of molds 5 form a circumference. Therefore, in order to arrange them efficiently in a circumferential shape, the side portion on the outer peripheral side has a lower trapezoid and the side portion on the inner peripheral side has a substantially trapezoidal shape.

As will be described later, when the solidified slag is used as a coarse aggregate for concrete, the thickness of the solidified slag is preferably 20 to 40 mm.
When the solidified slag having such a solidified thickness is manufactured, the depth of the recessed portion 5a of the mold 5 is assumed to be the maximum solidified thickness of the solidified slag, and the solidified slag having the maximum solidified thickness is also melted. For example, about 3 to 5 times the maximum solidification thickness is preferable so that the molten slag does not overflow from the mold when the flow rate of the slag varies.

The inner wall of the mold 5 may have an inclined surface 5b that is inclined outward from the bottom toward the top. This is to make the solidified slag easy to release when the mold 5 is inverted.
Moreover, when casting the molten slag 3, the mold 5 may be provided with a slag fall prevention portion 5 c for preventing the molten slag 3 from falling into the gap between the adjacent molds 5 (see FIG. 2).

As shown in FIGS. 2 to 4, the bottom surface of the mold 5 is provided with a ridge 5 d for forming a groove 18 a (see FIGS. 5 and 6) in the solidified slag 18.
The height of the protrusion 5d is preferably 20% to 50% of the thickness of the solidified slag 18 to be manufactured. However, since the protrusion 5d forms a groove 18a in the solidified slag 18 to form a starting point for inducing crushing, the thickness of the solidified slag 18 is formed if the groove 18a having a depth of about 5 mm is formed. If it is the range of 20-40 mm, it has confirmed that the solidification slag 18 can be crushed along the groove part 18a.
As shown in FIGS. 7 (a) and 7 (b), the shape of the ridge portion 5d is preferably a shape that shrinks upward in a cross-sectional shape orthogonal to the axis of the ridge portion 5d. With such a shape, the solidified slag 18 is easily released when the mold 5 is inverted.
In addition, the width | variety of the protruding item | line part 5d is about 10 mm at a top part.

  As for the arrangement of the ridges 5d, for example, it is preferable to form a lattice as shown in FIG. What is necessary is just to set suitably about the coarseness of a grid | lattice according to the objective of forming the groove part 18a in solidification slag, and the use of the solidification slag 18 after crushing. For example, as will be described later, it is a case where the solidified slag 18 is used as a coarse aggregate for concrete, and the rough crushing in the previous stage of crushing the solidified slag 18 with an impact crusher such as an impact crusher is efficiently performed. For the purpose, the diagonal length L of the grid may be set to be 200 mm or less. The reason is that the maximum diameter of the solidified slag that can be charged into an impact crushing device such as an impact crusher and can be crushed efficiently with a high yield is 200 mm. Therefore, if the diagonal length L of the lattice is set to 200 mm, This is because the maximum diameter in rough crushing is 200 mm or less, and the yield of crushing in an impact crusher such as an impact crusher can be improved.

Further, in the case of using the solidified slag 18 as a coarse aggregate for concrete, in order to perform crushing with an impact crusher such as an impact crusher with a high yield and to improve the shape of the concrete coarse aggregate as the final form. For example, as shown in FIG. 8, the lattice mesh may be finer, and for example, the diagonal length L of the lattice may be set to 10 mm to 20 mm. The reason is that the coarse aggregate for concrete has a size of 20-5mm, so the diagonal length of the grid can be set to 10mm-20mm so that it can be loaded into the impact crushing device as described above. This is because it is roughly crushed to a large size and can be crushed with a yield of 20 to 5 mm, which is a target shape, in crushing with an impact crusher such as an impact crusher.
In addition, when the cross-sectional shape of the convex part 5d is a shape which shrinks | contracts upwards, the length of the diagonal line of the grating | lattice mentioned above shall be measured in the top part of the convex part 5d.

The material of the mold 5 is made of a metal having excellent heat resistance such as cast steel or stainless steel. The thickness of the mold 5 is preferably about 40 mm, for example. If the thickness of the mold 5 is too thin, it is likely to be deformed by the heat of the high-temperature slag, causing troubles in transportation. Therefore, it is preferable to set it to at least 20 mm or more. In this case, it is preferable that the thickness is 80 mm or less.
The protrusion 5d provided on the bottom surface of the mold 5 may be integrally formed with the mold 5, or the protrusion 5d may be separately attached after the mold 5 is formed.

  In this example, since the mold 5 is arranged in a circumferential shape, the shape of the mold 5 is substantially trapezoidal in plan view, but the shape can be efficiently arranged according to the shape of the orbit. You only have to set it. For example, if the circular orbit is rectangular, the mold 5 is preferably rectangular.

(Circular movement mechanism)
The circular movement mechanism 7 supports the plurality of molds 5 in a circular shape in the proximity state and moves them around. The support mechanism for supporting the mold 5 is not particularly limited. For example, a shaft portion and a wheel are provided on the outer peripheral side and the inner peripheral side of the mold 5, and the wheel is supported on a rail extending in the circumferential direction. What is necessary is just to make it rotate at a predetermined speed with a drive mechanism.
As shown in FIG. 1 and FIG. 9, the orbital movement mechanism 7 is arranged in order in the circulation direction between the air circulation unit 9, the reverse discharge unit 11, the reverse movement unit 13, and the reinversion unit 15. And a re-inversion moving unit 17 as necessary.
Hereinafter, each part of the circular movement mechanism 7 will be described in detail.

(Air-cooled moving part)
The air-cooling moving unit 9 is a part that moves the casting mold 5 in the circumferential direction in a state where the poured molten slag 3 is held in the recessed portion 5a to air-cool and solidify the molten slag 3.
The air-cooling moving unit 9 requires time until the poured molten slag 3 is air-cooled and becomes a predetermined solidified state, but the orbiting moving mechanism 7 of the present embodiment circulates the mold 5 in the horizontal direction. Since it is made to move, there is no restriction that the half of the circular movement becomes the air-cooling moving part 9 for melting slag solidification as in the case where the mold 5 is linearly connected endlessly.
For this reason, it is possible to assign the air cooling moving unit 9 with a length excluding the circumferential length required for each part such as the reverse discharge unit 11 following the air cooling moving unit 9. As a result, useless time can be prevented from occurring during the round trip.
In the air-cooling moving unit 9, water spraying is prohibited because the strength of the slag solidified and solidified into a porous body is reduced when water is sprayed on the slag and cooled.
Further, the length (angle) occupied by the air-cooling moving unit 9 is preferably set to be more than 1/2 (180 degrees) and less than 3/4 (270 degrees) of the ratio of the total length of the orbit (360 degrees).

(Reverse discharge part)
The reverse discharge part 11 is a part which discharges the solidified slag 18 by inverting the mold 5 so that the recessed part 5a faces downward.
As shown in FIG. 1, the reverse discharge unit 11 is disposed next to the air-cooling moving unit 9, and is below the mold 5 around which the fall pit 19 that houses the solidified slag 18 that is discharged and falls. Is provided. The pit 19 corresponds to the first crushing device 53 in the present invention. The details of the drop pit 19 will be described later.
The mechanism for reversing the mold 5 is not particularly limited. For example, as described in the explanation of the circular movement mechanism 7 above, the mold 5 is rotatably supported when the shaft is supported on the rail via the wheels. In addition, the air-cooling moving unit 9 is provided with a holding unit that holds the posture of the mold 5 so that the mold 5 does not rotate. Subsequently, when the mold 5 comes to the reverse discharge unit 11, the posture of the mold 5 is set. What is necessary is just to provide the guide part which guides so that it may reverse.

  In addition, as shown in FIG. 1, it is preferable that the reversal direction of the casting mold 5 is reversed by rotating in the circumferential direction. If the mold 5 is rotated in the circumferential direction to be reversed, the center of gravity is shifted with respect to the center of rotation, for example, when the mold 5 is tilted in the radial direction of the circumferential direction, and the balance of the entire rotating device is lost. There is no. The rotation of the mold 5 in the circumferential direction may be forward rotation or reverse rotation.

(Reverse moving part)
The inversion moving unit 13 is a part that moves the mold 5 that has been inverted and discharged the solidified slag in an inverted state. As shown in FIG. 1, the reversal moving unit 13 is preferably provided with a cooling device 21 that cools the mold 5 by injecting a coolant from the upper side and the lower side of the mold 5.
Specifically, from the upper side and the lower side, it is preferable to spray the cooling water, mist, or cooling gas on the mold 5 with a nozzle or the like reversed. It is better to cool it by spraying it.
In the present embodiment, the mold 5 is inverted and cooled while the recessed portion 5a is positioned downward, so that the cooling water naturally falls and water does not remain in the mold 5 as it is. Accordingly, when the molten slag is poured again into the mold after re-inversion, as in the case where the cooling water remains in the mold 5, a large number of pores are generated in the solidified slag, so that it cannot be applied as a coarse aggregate for concrete. The problem disappears. Further, there is no danger of causing a steam explosion, and a high-quality solidified slag 18 can be manufactured safely.

In addition, by cooling the mold 5 from both the upper side and the lower side, the cooling time can be shortened as compared with cooling from only one side. Therefore, the length of the reversal moving unit 13 for mold cooling with respect to the entire round length is shortened. Accordingly, the length of the air-cooling moving part 9 for slag solidification can be increased by that amount, and the length of the air-cooling moving part 9 can be more than ½ of the entire length of the orbit.
As described above, the length of the air-cooling moving part 9 needs to be a predetermined length because it is necessary to secure time for the molten slag 3 to solidify into a predetermined state. The fact that the ratio of the length of each part in can be reduced means that the entire apparatus can be miniaturized. In that sense, cooling the mold 5 from both the upper and lower surfaces greatly contributes to downsizing of the entire apparatus.
In addition, since the mold 5 can be cooled evenly by cooling the mold 5 from both the upper and lower surfaces, there is an excellent effect that the mold 5 can be prevented from being deformed by heat shrinkage due to cooling. Since the deformation of the mold 5 becomes an important problem in performing these operations stably for the circular movement and reversal, sufficient cooling of the mold 5 is essential for the operation of this apparatus.

  As described above, the cooling of the mold 5 is preferably performed from both the upper side and the lower side, but in the present invention, one-side cooling from only the upper side or only from the lower side is not excluded.

(Re-inversion part)
The re-inversion part 15 is a part that re-inverts the mold 5 in the inverted state so that the recessed part 5a faces upward. The re-inversion portion 15 is preferably provided after the inversion moving portion 13 and after the cooling water does not remain in the recessed portion 5 a of the mold 5.
That is, as shown in FIG. 1, after cooling by the cooling device 21, it is preferably reversed by a predetermined distance and then reversed again. The reason for this is that by reversing and moving by a predetermined distance after cooling, the moisture remaining during cooling during the reversing movement partly falls spontaneously from the mold 5 and part of the mold 5 that has discharged hot solidified slag. It is because it evaporates by heat and is completely removed.

  In addition, the mechanism in which the casting_mold | template 5 is re-inverted is not specifically limited, For example, the mechanism similar to the inversion discharge part 11 mentioned above is employable. Further, as shown in FIG. 1, the re-reversing direction of the mold 5 is preferably re-reversed by rotating in the circumferential direction, as in the case of the reversing discharge unit 11. Further, the rotation of the mold 5 in the rotating direction may be either forward rotation or reverse rotation.

(Re-inversion moving part)
The reinversion moving unit 17 is a part that moves the reinverted mold 5 to a part into which the molten slag 3 is poured.
Note that if the molten slag 3 is poured immediately after the mold 5 is re-inverted by the re-inversion unit 15, the re-inversion moving unit 17 may not be provided.

An example of a method for producing solidified slag using the horizontal circulating solidified slag manufacturing apparatus 1 of the present embodiment configured as described above will be described together with the operation of the horizontal circulating solidified slag manufacturing apparatus 1.
The orbiting movement mechanism 7 is rotated at a predetermined speed, and the molten slag 3 is poured into the circulating mold 5 at the molten slag inflow portion during one round of the apparatus, and the mold 5 into which the molten slag 3 is poured is air-cooled and moved. The molten slag 3 moves through the section 9 and is cooled by air to become a solidified slag 18. At this time, since the grid-like ridges 5d are formed on the bottom surface of the mold 5, a grid-shaped groove 18a is formed on the bottom surface side of the mold 5 in the solidified slag 18 as shown in FIG. Is done.

The mold 5 that has arrived at the reverse discharge unit 11 rotates and reverses in the circumferential direction at the reverse discharge unit 11, and the solidified slag 18 is discharged into the drop pit 19.
The solidified slag discharged to the drop pit 19 is broken along the groove 18a by the impact of the drop, with the groove 18a serving as a crushing induction point. At this time, the length of the diagonal line of the lattice-like groove 18a is set to 200 mm or less or 10 mm to 20 mm, so that the maximum diameter is at least 200 mm or less, and crushing with an impact crushing device is performed. It can be done with good yield.
The mold 5 from which the solidified slag 18 has been discharged moves the reversal moving unit 13 in a reversed state, and is cooled by the cooling device 21 in the middle of the movement.
The mold 5 that has passed through the inversion moving unit 13 rotates in the circumferential direction in the reinversion unit 15 and reinverts so that the recessed portion 5a faces upward. The molten slag 3 is poured into the re-inverted mold 5 immediately after re-inversion or after moving the re-inversion moving part 17 again at the slag inflow part.

  As described above, in the horizontal circulation type solidified slag manufacturing apparatus 1 of the present embodiment, the solidified slag 18 is formed into the mold 5 by providing the mold 5 with the protruding portion 5d for forming the groove 18a in the solidified slag 18. Since the solidified slag 18 is crushed along the groove 18a when it is released from the mold and dropped into the drop pit 19, the yield when crushed by an impact crusher or the like is good and the efficiency is high.

  Further, the horizontal circulation type solidified slag manufacturing apparatus 1 of the present embodiment includes a circulation moving mechanism 7 that moves the plurality of molds 5 in the horizontal direction in a state where the molds 5 are supported in close proximity, and the apparatus 1 of the circulation movement mechanism 7. During the circumference, the air-cooled moving part 9 for air-cooling and solidifying, the reversing discharge part 11 for reversing the mold 5 so that the recessed part 5a faces downward and discharging the solidified slag 18 and the reversed mold 5 are reversed. The mold 5 is linearly endless by providing the reversal moving part 13 for moving the mold 5 in the state and the re-inversion part 15 for re-reversing the mold 5 in the reversed state so that the recessed part 5a faces upward. The total circumferential length of the apparatus is not limited by the required length of the air-cooling process of slag solidification as in the example connected to, and the circumferential direction length required for each part such as the reverse discharge part 11 following the air-cooling moving part 9 Allotted to the length of the air-cooled moving part 9 except for It becomes possible, wasted time does not occur in the circumferential stroke.

  Further, in the present embodiment, the mold 5 is cooled from the upper and lower surfaces in the reversal moving unit 13, so that the mold 5 can be efficiently cooled, thereby shortening the length of the reversal moving unit 13. As a result, the circulation length can be shortened and the entire apparatus can be made compact.

In addition, slag aggregate for JIS A5011 concrete-Part 1: To manufacture a blast furnace slag coarse aggregate 2005 particle size range specified in blast furnace slag aggregate, the solidification thickness of the solidified slag 18 is 20 to 40 mm. did. When the solidification thickness is 20 mm or less, the particle size distribution after crushing becomes fine and does not satisfy the standard.
On the other hand, when the solidification thickness is 40 mm or more, the water absorption rate increases and exceeds 1.5%, and crushing is required to reduce it to 20 mm or less, and the fine grains of less than 5 mm increase and the yield decreases. become.

In the above example, as shown in FIG. 1, the example in which the circulation direction is clockwise is shown. , The reverse moving unit, the re-inverting unit, and, if necessary, the re-inverting moving unit may be counterclockwise.
Also, the shape of the circle may not be a circle but may be, for example, an ellipse or a rectangle.

As described above, one feature of the horizontal circulatory solidified slag manufacturing apparatus 1 of the present invention is that the protruding strip portion 5d for forming the groove portion 18a in the solidified slag is provided on the bottom surface of the mold. The form of the solidified slag manufacturing apparatus may be an endless solidified slag manufacturing apparatus.
As shown in FIG. 10, the endless-type solidified slag manufacturing apparatus 31 circulates a plurality of molds 39 into which molten slag 37 is injected from a slag pan 33 through a slag tub 35 and a plurality of molds 39 in a linear endless manner. A rotating mechanism 41 for spraying and a watering nozzle 43 for spraying cooling water on the mold are provided. The bottom surface of the mold 39 is provided with the grid-like protruding ridges 5d as described above.

In the endless solidified slag manufacturing apparatus 31 as described above, the molten blast furnace slag is supplied into the mold 39 installed in the rotating mechanism 41 by driving the rotating mechanism 41, thereby obtaining a plate-shaped solidified slag having a predetermined thickness. Can be produced continuously.
At the uppermost part of the revolving mechanism 41, the plate-shaped solidified slag is dropped into the drop pit 19 by reversing the mold 39.
The inverted mold 39 is sprinkled on the mold surface from the water nozzle 43 to cool the mold 39.

[Embodiment 2]
Next, the coarse aggregate manufacturing apparatus 50 for concrete which manufactures the coarse aggregate for concrete using said solidification slag manufacturing apparatus is demonstrated.
As shown in FIG. 11, the coarse aggregate manufacturing apparatus 50 for concrete according to the present embodiment has a solidified slag manufacturing apparatus 51 that manufactures solidified slag, and a solidified slag manufactured by the solidified slag manufacturing apparatus 51 at a predetermined height. A first crushing device 53 for crushing the solidified slag by dropping from the first crushing device, a second crushing device 57 comprising an impact crushing device for crushing the solidified slag having a predetermined shape or less from the solidified slag crushed by the first crushing device 53, A second classifying device 59 for classifying the solidified slag crushed by the second crushing device 57 into 5 to 20 mm is provided. What is classified by the second classifying device 59 is the coarse aggregate 60 for concrete.
Hereinafter, each device will be described in detail.

<Coagulated slag production equipment>
As the solidified slag producing apparatus, the horizontal circulation type solidified slag producing apparatus 1 shown in FIG. 1 described in Embodiment 1 or the endless solidified slag producing apparatus 31 shown in FIG. 10 is used.
In both of the horizontal revolving solidified slag producing apparatus 1 and the endless solidified slag producing apparatus 31, the mold 5 is provided with a ridge 5 d for forming a grid-like groove 18 a in the solidified slag 18.

<First crusher>
The first crushing device 53 drops the solidified slag produced by the solidified slag producing device 51 from a predetermined height, and crushes the solidified slag 18 along the groove portion 18a formed in the solidified slag 18 by the action of gravity. Device.
An example of the first crushing device 53 is the drop pit 19 shown in FIGS. 1 and 10. It is preferable to lay an iron plate 45 on the floor of the pit in order to promote crushing.
The drop height difference is preferably 4.5 m or more. According to the inventor's experiment, by continuously dropping the solidified slag 18 from 4.5 m, the crushed solidified slag 18 gradually accumulates, but eventually becomes a mountain shape of about 2 m. Therefore, by ensuring 4.5 m as the height difference of the fall pit 19, the height difference of 2 m can be maintained finally, and the solidified slag 18 can be roughly crushed as the first crushing step S <b> 3. Is possible.

  In the solidified slag manufacturing apparatus of the present embodiment, the protrusion 5d is formed on the mold 5, and the solidified slag 18 is roughly crushed to 200 mm or less by dropping to form a groove 18a (see FIG. 5). Therefore, it is not necessary to classify the second crushing device 57 before charging the solidified slag.

<Second crushing device>
The second crushing device 57 is a device including an impact crushing device that crushes the solidified slag roughly crushed by the first crushing device 53.
Examples of the impact crusher include an impact crusher and a hammer crusher. The reason why the impact crushing device is used as the second crushing device is that, as described above, the corners of the solidified slag after crushing can be taken and it is suitable as a coarse aggregate for concrete.
The second crushing device 57 is charged with the solidified slag crushed along the groove portion 18a by the first crushing device 53, so that the crushing efficiency is high and the yield can be improved.

<Second classifier>
The second classifying device 59 is a device that classifies the solidified slag crushed by the second crushing device 57 into 5 to 20 mm. The second classifying device 59 includes a first vibrating screen that screens the solidified slag crushed by the second crushing device 57 to 20 mm or less, and a 20 mm or less solidified slag that is sieved by the first vibrating screen through a 5 mm sieve screen. This is a device that leaves 5-20 mm of solidified slag on the sieve.
The solidified slag of more than 20 mm on the sieve by the first vibrating screen may be charged again in the second crushing device and crushed.

As described above, according to the concrete coarse aggregate production apparatus 50 of the present embodiment, the concrete coarse aggregate can be efficiently used from the production of solidified slag to the final shape of 5-20 mm solidified slag. It can be done with good yield.
In addition, since the protrusion 5d for forming the lattice-like groove 18a in the solidified slag 18 is provided in the mold 5 of the solidified slag manufacturing apparatus, a simple first crushing device 53 such as the drop pit 19 is provided. Even if it is used, it can be efficiently roughly crushed into a shape that can be loaded into an impact crusher such as an impact crusher, so there is no need to classify the solidified slag before loading into the impact crushing device, and the entire device is compact. Can be

An experiment for confirming the improvement effect of the yield and the particle shape determination performance rate by inserting the protruding portion on the bottom surface of the mold and forming the groove 18a in the solidified slag will be described.
The experimental conditions are as follows.
As shown in the photo in Fig. 12, a rectangular natural stone (black granite) plate (120 mm long, 150 mm wide, 20 mm thick) is cut into a grid-like cut and crushed with an impact crusher. The yield and shape improvement effect were confirmed.
The grid pitch was 15 mm, and the cuts were 2 mm wide and 5 mm deep.
The reason why natural stone is used is that it has compressive strength equivalent to that of solidified slag and is suitable for crushing tests.
The product yield in the range of 5 to 20 mm was improved by 3% compared to the case where the cutting process was not performed. In addition, the actual particle shape determination rate (JIS A 5005-2009) was improved by 1% as compared with the case where no cutting was performed.
As shown in this experimental result, it was demonstrated that the product yield and the particle shape determination performance rate are improved by forming the groove 18a in the solidified slag.

As shown in FIG. 3, the mold 5 in the above-described embodiment is provided with the protruding strips 5 d in a grid shape, and the protruding strips 5 d are continuous at the intersections of the grids and are partitioned by the protruding strips 5 d. The department was independent.
However, as shown in FIGS. 13 and 14, in the case where the ridges 5d are provided in a lattice shape, the ridges 5d are interrupted without being continuous at the intersections of the ridges 5d. A flat portion 5e that is flush with the bottom surface of the mold may be formed.

By making the protruding line portion 5d break at the intersecting portion, it is possible to follow a shape change caused by expansion and contraction of the mold 5 due to a temperature change, and to prevent the protruding line portion 5d from being damaged.
Further, by making the intersecting portion of the ridge portion 5d into a flat portion 5e, each partition portion of the mold 5 communicates through the flat portion 5e, and the molten slag contained in each partition portion is transferred to other partition portions. It becomes possible to flow in easily, and the molten slag contained in each partition can be made uniform.
Furthermore, since the molten slag accommodated in each compartment can easily flow into the other compartments, the fluidity of the molten slag is ensured, the friction between the molten slag and the ridges 5d is reduced, and the ridges 5d. Can prevent wear and damage.

FIG. 15 is an explanatory diagram for explaining the relationship between the lengths of the ridges 5d and the flat portions 5e. In FIG. 15, the length of the x-direction protrusion 5d is Lx, the length of the x-direction flat portion 5e is Lxgap, the length of the y-direction protrusion 5d is Ly, and the length of the flat portion 5e in the y-direction. This is expressed as Lygap.
The size of the flat portion 5e (the length in the xy direction) is at most the same as the length in the xy direction of the ridge portion 5d, that is, Lx: Lxgap = 1: 1 and Ly: Lygap = 1: 1 (where Lx = It does not have to be Ly). A more preferable size of the flat portion 5e is about 0.1 to 0.2 times the length of the ridge portion 5d, that is, Lxgap = 0.1 × Lx to 0.2 × Lx and Lygap = 0.1 × Ly to 0.2 × Ly.
If the length of the flat portion 5e is too long with respect to the length of the ridge portion 5d, it becomes difficult to break into a predetermined shape when the mold 5 is reversed and the solidified slag is dropped, and conversely the length of the flat portion 5e. Is too short with respect to the length of the ridge 5d, the fluidity of the molten slag to each partition is deteriorated, and the effect of providing the flat portion 5e as described above, that is, the molten slag is uniformized, or the ridge is formed. The effect of preventing wear and breakage at the portion 5 is not sufficiently obtained.

In addition, regarding the shape of the ridge portion 5d, as shown in FIG. 16, it is preferable to provide R (R) at the upper corner portion and the lower corner portion (boundary portion with the bottom portion) of the ridge portion 5d. preferable.
By providing R (R) at the site, the fluidity of the molten slag is improved, and the effect of preventing the protrusion 5d from being damaged can be obtained. Moreover, after the molten slag solidifies, the effect that it becomes easy to come off from the casting_mold | template 5 is also acquired.
In addition, as a preferable magnitude | size of R (R), the radius r1, r2 of R (R) is about 10-15 mm. If R (r) radii r1 and r2 are too small, the above effects cannot be obtained. Conversely, if R (r) radii r1 and r2 are too large, waste is increased. That is, especially when the radius r2 is increased, the width of the bottom of the ridge 5d is increased, and the amount of molten slag to be poured is reduced, and the volume of molten slag to be poured relative to the area of the recessed portion 5a of the mold 5 is reduced. The ratio decreases and waste increases.
The radius r1 of R (R) provided at the upper corner of the ridge 5d and the radius r2 of R (R) provided at the lower corner (boundary with the bottom) may not be the same.

Further, regarding the shape of the ridge 5d, an inclined surface is formed at the tip of the ridge 5d as shown in FIG. 17 (a), or the tip is contracted as shown in FIG. 17 (b). Such an inclined surface may be formed. By providing an inclined surface at the tip of the protruding line portion 5d, the fluidity of the molten slag can be further improved.
Furthermore, the inclined surface provided at the tip of the ridge 5d may be an arcuate surface curved in the inclination direction and / or the width direction.
Further, FIG. 15 shows the case where the convex strip portion 5d is a rectangular parallelepiped, but even when the flat portion 5e is provided, the shape of the convex strip portion 5d is not limited to the rectangular parallelepiped, as shown in FIG. A shape with a narrow upper end side or a shape with an upper end in an arc shape as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Horizontal circulation type solidification slag manufacturing apparatus 3 Molten slag 5 Mold 5a Recessed part 5b Inclined surface 5c Slag fall prevention part 5d Projection part 5e Flat part 7 Circulation movement mechanism 9 Air-cooling movement part 11 Reverse discharge part 13 Reverse movement part 15 Reinversion Part 17 Re-inversion moving part 18 Solidification slag 18a Groove part 19 Falling pit 20 樋 21 Cooling device 31 Endless solidification slag production equipment 33 Slag pan 35 Slag bowl 37 Molten slag 39 Mold 41 Recirculation mechanism 43 Sprinkling nozzle 45 Iron plate 48 Sieve lattice 50 Coarse aggregate production equipment for concrete 51 Solidification slag production equipment 53 First crushing equipment 57 Second crushing equipment 59 Second classification equipment

Claims (11)

A solidified slag manufacturing apparatus that has a plurality of metal molds having recessed portions into which molten slag is poured, and that manufactures solidified slag by pouring molten slag into the recessed portions,
Provided on the bottom surface of the mold is a convex strip having a height of 5 mm or more for forming a groove in the solidified slag ;
An apparatus for producing solidified slag , wherein the ridges are arranged in a lattice pattern, and flat portions are provided so that the ridges do not continue at intersections of the ridges .   The solidified slag manufacturing apparatus according to claim 1, wherein the ridge portion has a shape that contracts upward in a cross-sectional shape orthogonal to the axis.   The solidified slag manufacturing apparatus according to claim 1 or 2, wherein rounds are provided at an upper corner portion and a lower corner portion of the ridge portion.   The coagulation according to any one of claims 1 to 3, wherein the protrusions are arranged in a grid pattern, and the size of the grid is set so that the length of the diagonal line is 200 mm or less. Slag manufacturing equipment.   The said protruding item | line part is arrange | positioned at a grid | lattice form, and the magnitude | size of the grid | lattice was set so that the length of a diagonal might be set to 10 mm-20 mm. Solidified slag production equipment.   The solidified slag according to any one of claims 1 to 5, wherein the solidified slag is continuously operated by supporting the mold so as to be able to move around and pouring molten slag into the recessed portion to produce the solidified slag. manufacturing device. Comprising a circular movement mechanism for circular movement in the horizontal direction in a state of supporting the plurality of molds close to each other,
The circulatory moving mechanism moves the mold in the circulatory direction while holding the molten slag poured in the recess during one round of the apparatus, and air-cooled moving part for cooling and solidifying the molten slag by air, and the mold The reversing discharge part for discharging the solidified slag by reversing so that the recessed part is directed downward, the reversing moving part for moving the reversed mold in the reversed state, and the recessed part above the reversing mold. The solidification slag manufacturing apparatus of Claim 6 provided with the re-inversion part which re-inverts so that it may face.   In one round of the circular moving mechanism, the length (angle) occupied by the air-cooled moving part is more than 1/2 (180 degrees) and less than 3/4 (270 degrees) of the total length of the circular trajectory (full angle 360 degrees). The solidified slag manufacturing apparatus according to claim 7.   A method for producing a solidified slag, comprising producing the solidified slag using the solidified slag producing apparatus according to claim 1.   A solidified slag production apparatus according to any one of claims 1 to 8, a first crushing apparatus that crushes the solidified slag by dropping the solidified slag produced by the solidified slag production apparatus from a predetermined height, A second crushing device comprising an impact crushing device that crushes the solidified slag having a predetermined shape or less roughly crushed by the 1 classifier, and a second classification for classifying the solidified slag crushed by the second crushing device to 5 to 20 mm. An apparatus for producing coarse aggregate for concrete, comprising the apparatus.   A method for producing a coarse aggregate for concrete, comprising producing the coarse aggregate for concrete using the apparatus for producing a coarse aggregate for concrete according to claim 10.