JP3226759B2 - Granular slag manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten slag (molten slag).
The present invention relates to an apparatus for producing granular slag by flying, subdivided and rapidly cooled by a rotary drum having blades installed therein.

[0002]

2. Description of the Related Art For example, in the case of a slag treatment process in which molten slag (slag) generated when pig iron is refined into steel by a converter is discharged into a slag yard called a "hata" and naturally cooled, the obtained slag is subject to aging. The slag is a bottleneck when the slag is effectively used as, for example, a roadbed material because it causes change, collapse, and powdering. Therefore, Japanese Patent Laid-Open No. 2-1
As disclosed in Japanese Patent Publication No. 02151, granular slag is produced by a process of using a rotating drum to fly molten slag in a ventilated rotary hood to finely divide and apply a water mist to quench. Techniques for doing so are known. When the production process of this granular slag is performed, the molten slag is quenched by water mist in the process of flying and being finely divided, so that the slag obtained in the process of discharging the molten slag to the slag yard and allowing it to cool naturally is used. As described above, there is no change with time causing collapse and pulverization, and the vitrification rate is increased by quenching, so that hydraulicity is increased and a bottleneck for effective utilization of slag can be eliminated. In addition, the manufacturing process of the granular slag is a very simple process because the granular slag can be obtained from the molten slag in an extremely small space and a crushing step is not required as in the process using a slag yard. Further, since the aging of the slag, which is performed to prevent a change with time such as the above-mentioned collapse and powdering from occurring, can be omitted, heat energy,
This has the advantage of saving space.

[0003]

However, the apparatus for producing granular slag used in the above-mentioned process includes:
There were some unresolved technical issues. That is, in the conventional apparatus for producing granular slag, the rotating drum is arranged in a plurality of stages, usually in two stages.
As disclosed in Japanese Patent Application Publication No. 4 (1994) -104, it is preferable to make the angle of the blades different between the first rotating drum and the second rotating drum. For this purpose, as shown in FIG. It is necessary to keep the rotary drum blades 80 and 81 made of the first rotary drum and the second rotary drum separately as spare parts, which causes a problem of high cost. Further, the blades 80 and 81 fixed to the outer peripheral portion of the rotating drum are
A screw hole was provided in the cylindrical portion 83 of FIG. 7 (see FIG. 7), a headed bolt was inserted into the screw hole from the back side, a tie plate was placed, and a nut was tightened from above to mount the screw.
The production of granular slag with such blades fastened,
When the blades 80 and 81 are worn out and need to be replaced, the screwing portions adhere to each other, making it impossible to remove the blades 80 and 81, and furthermore, it is necessary to attach bolts from inside the cylindrical portion 83. Therefore, even when replacing one of the blades 80 and 81, the rotating drum must be removed and the screwed portion must be removed by drilling or the like offline, not only greatly reducing the maintainability but also increasing the equipment downtime. Therefore, there is a problem that equipment productivity is reduced. On the other hand, the blades 80 and 81 have hollow portions 84 and 85 for water cooling, respectively, and a fixed pipe 87 of a welding attachment structure is provided from a water supply unit 86 and a drainage unit (not shown) provided on both sides of the rotary drum 82. The blades 80, 81
The structure is difficult to remove and attach at the site, and from this aspect, there is a problem that not only the maintainability is greatly impaired, but also the equipment downtime is increased and the productivity is reduced. In FIG. 7, reference numeral 87a denotes a rotation axis,
Reference numerals 8 and 89 denote sprockets, and m denotes a bearing center line. The present invention has been made in view of such circumstances, and solves the above-described problems in the conventional granular slag manufacturing apparatus,
It is an object of the present invention to provide a granular slag manufacturing apparatus capable of improving the durability and maintainability of the apparatus with a simple structure and improving the productivity.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The apparatus for producing granular slag according to the first aspect, includes first and second rotary drums having different angles of impact surfaces of the blades, which are replaceably attached to the outer peripheral surface, with the molten slag, are juxtaposed in the front-rear direction. In the apparatus for producing granular slag in which the molten slag supplied downward to the rotating drum is caused to fly by the first and second rotating drums and rapidly cooled and granulated, one surface of each of the blades is the first surface. The collision surface of the rotating drum and the other surface serve as the collision surface of the second rotating drum, and the blade attached to the outer peripheral surface of the cylindrical portion of the first and second rotating drums is a dual-purpose type. I have. Also,
An apparatus for producing granular slag according to claim 2, wherein a rotating drum having a plurality of blades which can be replaced around the rotating drum is used, and the molten slag fed down is caused to fly by the rotating drum and rapidly cooled to be granulated. In the slag manufacturing apparatus, the base end of the blade has a leg whose bottom is widened along the outer peripheral surface of the cylindrical body of the rotary drum, and simultaneously presses the leg of the adjacent blade. The tie plate is screwed into a long hole formed in the cylindrical portion of the rotary drum by a locking bolt whose head is loosely fitted at a certain angle and locked at another angle. Here, the hook bolts include a hammer bolt and an L-shaped bolt. According to a third aspect of the present invention, there is provided a granular slag manufacturing apparatus in which a rotary joint for supplying and draining water is mounted on a central rotating shaft, and a rotary joint for supplying cooling water to a blade which is replaceably mounted on an outer peripheral surface. Using a drum, in a manufacturing apparatus of granular slag to fly and rapidly cool and granulate the molten slag that is supplied to the rotating drum, the slag is formed on the rotating shaft on both sides of the cylindrical portion of the rotating drum. A water supply chamber and a drainage chamber are respectively connected to a water supply pipe and a drainage pipe, and a water supply port and a water discharge port formed at both end portions of the blade are provided through an intermediate joint such as a union or a flange. Each is connected to a drainage room.

[0005]

In the apparatus for producing granular slag according to the first aspect, one surface of the blade that is exchangeably attached to the first and second rotary drums serves as an impact surface of the first rotary drum, and The other surface is a collision surface of the second rotating drum, and can be used as the first rotating drum and the second rotating drum by changing the mounting surface of the blade. It is possible to reduce the stock of expensive blades made of stainless steel casting and the like, and to mount the blades used for a certain period of time on the first rotating drum to the second rotating drum by changing the mounting direction. It is possible to extend the life of the entire blade. In the apparatus for producing granular slag according to claim 2, a leg portion is provided at a base end portion of the blade, and a tie plate for simultaneously pressing the leg portions of adjacent blades is formed on the cylindrical body of the rotary drum. Since the head is loosely fitted in the elongated hole at a certain angle and is screwed with a locking bolt which is locked at another angle, the mounting of the locking bolt is extremely easy. In the apparatus for producing granular slag according to claim 3, a water supply chamber and a drainage chamber are provided on both sides of the cylindrical body of the rotary drum, the water supply chamber and the drainage chamber being respectively connected to a water supply pipe and a drainage pipe formed on the rotating shaft. The water supply port and the water discharge port formed at both end portions of the blade of the rotary drum are connected to the water supply chamber and the water discharge chamber via an intermediate joint such as a union or a flange, respectively. At the time of removal, it can be easily performed by mounting or separating the intermediate joint.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 (A) is a sectional view of a granular slag manufacturing apparatus according to one embodiment of the present invention, FIG. 1 (B) is a partial plan view thereof, FIG. 2 is a sectional view around a rotary drum, FIG. FIG. 4 is a partially enlarged cross-sectional view of the rotary drum, and FIG.
FIG. 6 is a schematic explanatory view of a granular slag manufacturing apparatus.

As shown in FIGS. 1 and 6, an apparatus 10 for producing granular slag according to one embodiment of the present invention comprises first and second rotating drums 12 and 1 driven to rotate by a motor 11.
3, a rotary hood 14 wrapped around the rotary hood 14, a product discharge conveyor 15 provided at the front bottom of the rotary hood 14, an exhaust pipe 16 for sucking air inside, and an inside of the rotary hood 14. And a water nozzle pipe 17 provided on both sides of the upper part, and the molten slag 19 supplied downward from the slag pot 18 is caused to fly by the first and second rotary drums 12 and 13 and quenched by water mist. To produce granular slag. Hereinafter, these will be described in detail.

The first and second rotating drums 12, 13
The blades 22 made of stainless steel are attached at a constant pitch to the outer periphery of a cylindrical body 21 having a rotating shaft 20 protruding from both sides. As shown in FIG. 3, the blade 22 of the rotary drum 12 has a collision surface 23 of the molten slag in the rotation direction, and the collision surface 23 is about 10 to 20 degrees with respect to the radial direction of the rotary drum 12 (preferably, , 15 degrees). The blade 2 of the rotating drum 13
As shown in FIG. 4, the rotary drum 2 has a collision surface 24 which is substantially coincident in the radial direction on the rotation direction side, and the blade 22 used for the rotary drum 12 is also used by changing its direction and mounting.

The blade 22 has a wide leg 25 at a lower portion along the circumferential direction of the cylindrical portion 21, a concave portion 26 at a bottom inner portion, and a fitting provided on the outer periphery of the cylindrical portion 21. The joint projection 27 is fitted, and the blade 22 is attached to a fixed position of the cylindrical body 21.
Is provided with a tie plate 28 for pressing and fixing the legs 25 of the blades 22 on both sides. The tie plate 28 has pressing portions 29 and 30 on both sides, protrudes downward at the center, and has a plurality of stepped holes 31 on the surface. The stepped hole 31 is formed as a long hole in the axial direction of the rotary drum 12 so that a T-shaped head 34 of a hammer-shaped bolt 33 as an example of a retaining bolt can be inserted. On the other hand, the cylindrical portion 21 is provided with an elongated hole 32 corresponding to the center position of the stepped hole 31, and the head 34 of the hammer-shaped bolt 33 can be fitted at a fixed angle from the outer surface of the cylindrical portion 21. It has become. A cover 3 for preventing the attached hammer bolt 33 from dropping is provided on the back side of the cylindrical body 21.
5 are provided.

Therefore, when the blades 22 are to be mounted, a water pipe, which will be described later, is provided to connect the blades 22 to the cylindrical portion 21.
After that, the tie plate 28 into which the hammer-shaped bolt 33 is inserted is attached so as to cover the legs 25 of the adjacent blades 22, and the head 34 of the hammer-shaped bolt 33 is elongated at a predetermined angle. 32, rotate the hammer-shaped bolt 33 by 90 degrees to lock it, tighten the nut 36 to be screwed in, fix the tie plate 28, and remove it in the reverse order, or it is difficult In this case, the threaded portion of the nut 36 of the hammer-shaped bolt 33 is cut with gas, and the tie plate 28
Will be removed. Of course, the blade 2 with the hammer-shaped bolt 33
When the second rotating drum 12 (same for 13) is fixed to the cylindrical body portion 21, the replacement time of the blades 22 can be reduced by applying a pneumatic wrench. It is also possible to divide the tie plate 28 into a plurality of parts in the axial direction of the rotary drum, thereby preventing cutting of the hammer bolt 33 due to thermal expansion.

Next, the water pipe of the blade 22 will be described with reference to FIGS. 1 and 2. The inside of the blade 22 is a space 37, through which cooling water circulates. A water supply port 38 and a water discharge port 39 communicating with both sides of the space 37 are provided at both ends of the blade 22. Also,
The rotating shafts 20 on both sides of the rotating drums 12 and 13 are hollow shafts, and a water supply chamber 44 and a drainage chamber 45 are formed, each partitioned by two side plates 40 to 43. The plates disposed in the middle are the rectifying plates 46 and 47 in which a plurality of holes are uniformly formed around the plates.

The side plates 41 and 43 have the same number of connection ports 4 as the number of blades 22 attached around the cylindrical body 21.
8 and 49 are respectively formed, and a connection port 48 corresponding to the water supply port 38 and a connection port 49 corresponding to the drain port 39 are provided with two unions 50, 5, which are an example of an intermediate joint.
1 through a flexible short tube (flexible hose) 52. Both sides of the rotary drum 12 (also 13) are rotatably supported by bearings 53 and 54, and rotary joints 55 and 56 are attached to ends of the rotary shaft 20 to rotate the rotary drum 1.
2 circulates the cooling water without any trouble.

A sprocket 59 is mounted on one of the rotary shafts 20 of the rotary drum 12, and a sprocket 62 mounted on an output shaft of a speed reducer 60 connected to the motor 11, as shown in FIG. It is connected by a chain 63 and is driven to rotate. As shown in FIG. 6, another sprocket 64 attached to the rotating shaft 20 is meshed with a sprocket 65 attached to the rotating shaft 20 of the rotating drum 13 by a chain 66, and the rotating drum 12, 13 rotates in a fixed direction (clockwise in FIG. 6). In addition,
In this embodiment, the drive source for the rotary drum 12 and the drive source for the rotary drum 13 are driven by the same motor 11, but it is also possible to provide independent motors, so that the rotation speed can be controlled independently. .

The rotary hood 14 is arranged at a slight inclination to prevent scattering of flying particulate slag and to fill the inside with water mist from the water nozzle pipe 17 to efficiently cool the particulate slag. The guide rails 67 and 68 are provided around the periphery, and the lower part is supported by a plurality of guide rollers 69 and 70, respectively. A cover 71 for covering the first and second rotary drums 12 and 13 is provided on the front side of the rotary hood 14, and a gutter 72 for supplying the molten slag 19 to the first rotary drum 12 is provided. Have been. A water nozzle pipe 17 is provided inside the cover 71 and the inside of the rotary hood 14, so that the water mist is applied to the flying granular slag to rapidly cool it. An exhaust port 73 is provided at the front end of the rotary hood 14 and is connected by a subsequent exhaust pipe 16 to exhaust internal steam and air. A sprocket 75 is provided at the tip of the rotary hood 14, and a speed reduction motor 7 is provided by a chain 76.
7 is connected to a sprocket 78 connected to the output shaft. In addition, 79 is a mount.

Next, the operation of the granular slag manufacturing apparatus 10 will be described. As shown in FIG. 1, the blades 22 fixed to the first rotary drum 12 for granulating the molten slag include:
One outer surface in the rotating direction of the rotary drum 12 serves as a collision surface 23 for the molten slag, and has a surface inclined at an angle θ with respect to the radial direction of the rotary drum 12, so that the molten slag 19 is supplied downward. When the blades 22 are applied to the cylindrical portion 21 on the side of the main body, they are attached as shown in FIG.
On the other hand, when this blade 22 is applied to the second rotating drum 13, the blade 22 is attached to the outer peripheral portion of the cylindrical body portion 21 so that the right-angled surface becomes the collision surface 24 as shown in FIG.

The reason why the collision surface 23 of the blades 22 in the first rotary drum 12 is inclined at a constant angle θ with respect to the radial direction of the rotary drum 12 is that the rotary drums 12 arranged in two stages, 13 causes the molten slag 19 to fly in the ventilated rotary hood 14 and take up the rotary hood 14 by the upward rotation of the first rotary drum 12 when a process of subdividing the molten slag 19 is employed.
This is because a semi-molten granular slag collides with the inner wall surface of the slab to form a flight trajectory that does not cause re-fusion. On the other hand, the reason why the collision surface 24 of the blade 22 of the second rotary drum 13 is formed so as to extend in the radial direction is that the molten slag 19 sent from the first rotary drum 12 is made into a water mist atmosphere. This is to completely fly into the space inside the rotary hood 14 and to make it finely divided. Thus, by setting the cross-sectional profile of the blade 22 as described above, the blade 22 can be shared by the first and second rotating drums 12 and 13, and the spare parts inventory can be reduced by half. Become.

Next, the operation of the rotary drum cooling water system of the granular slag manufacturing apparatus 10 will be described. As shown in FIGS. 1 and 2, the cooling water passes through the rotary joint 55 on the left side, and the rotary shaft 20 of the rotary drum 12 (same for 13).
And enters a water supply chamber 44 formed by the side plates 40 and 41. Next, the cooling water enters the space 37 of the blade 22 via the union 51 and the flexible short tube 52 and the union 50 connected to one side of the blade 22. Feather 22
The cooling water having passed through the space portion 37 enters the drainage chamber 45 from the union 50 connected to the opposite side of the blade 22 via the flexible short tube 52 and the union 51, and enters the rotating shaft 20 on the other side. Is discharged via the rotary joint 56 on the right side of FIG.

When the blades 22 are individually replaced, the supply of the cooling water is stopped, and then the rotary drum 12 (same for the rotary drum 13).
The union 50 on the blade 22 side of the flexible short pipe 52 on both sides is removed, and then the hammer bolt 33 and the nut 3 in FIG.
The tie plate 28 is disengaged from the cylinder 6 and the blades 22 are taken out of the tubular body 21. Thereafter, the new blade 22 is fixed to the outer peripheral portion of the cylindrical body portion 21 by the hammer-shaped bolt 33 and the tie plate 28 in a procedure reverse to the above. Next, the flexible short tube 52 is connected to the blade 22 by the union 50.

In the above-described embodiment, the blades 22 can be replaced individually and on-site in a short time without having to remove the rotary drums 12 and 13 as in the prior art. Can be repaired in a short time. In the above-described embodiment, the mounting angle of the blades 22 of the rotary drums 12 and 13 can be further changed as necessary.

[0020]

As is apparent from the above description, the apparatus for producing granular slag according to the first aspect can share the blades attached to the rotary drum with the first rotary drum and the second rotary drum. Spare parts inventory can be greatly reduced. In the granular slag manufacturing apparatus according to the second and third aspects, the blades to be attached to the first and second rotary drums can be individually replaced on site in a short time, so that the apparatus can be repaired in an extremely short time. , Maintainability, personnel efficiency and productivity can be greatly improved.

[Brief description of the drawings]

FIG. 1A is a sectional view of a granular slag manufacturing apparatus according to one embodiment of the present invention, and FIG. 1B is a partial plan view thereof.

FIG. 2 is a sectional view around a rotary drum.

FIG. 3 is a partially enlarged sectional view of a rotary drum.

FIG. 4 is a partially enlarged sectional view of a rotary drum.

5 is a sectional view taken along the line CC in FIG.

FIG. 6 is a schematic explanatory view of an apparatus for producing granular slag.

FIG. 7 is a partial sectional view of an apparatus for manufacturing granular slag according to a conventional example.

FIG. 8 is a sectional view of a blade according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Granular slag manufacturing apparatus 11 Motor 12 Rotary drum 13 Rotary drum 14 Rotary hood 15 Product discharge conveyor 16 Exhaust pipe 17 Water nozzle pipe 18 Slag pot 19 Melted slag 20 Rotating shaft 21 Cylindrical body 22 Blade 23 Collision surface 24 Collision surface 25 Leg 26 Depressed portion 27 Fitting convex portion 28 Type plate 29 Pressing portion 30 Pressing portion 31 Stepped hole 32 Long hole 33 Hammer bolt 34 Head 35 Cover 36 Nut 37 Space portion 38 Water supply port 39 Drain port 40 Side plate 41 Side plate 42 Side plate 43 Side plate 44 Water supply chamber 45 Drainage chamber 46 Rectifier plate 47 Rectifier plate 48 Connection port 49 Connection port 50 Union 51 Union 52 Flexible short tube 53 Bearing 54 Bearing 55 Rotary joint 56 Rotary joint 59 Sprocket 60 Reduction gear 62 Sprocket 63 En 64 sprocket 65 the sprocket 66 a chain 67 guide rail 68 guide rail 69 guide roller 70 guide roller 71 cover 72 trough 73 outlet 75 sprocket 76 chain 77 reduction motor 78 the sprocket 79 gantry

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tsukasa Kusumoto 1-36-1 Makiyama, Tobata-ku, Kitakyushu City, Fukuoka Prefecture Inside (72) Inventor Hironobu Ogami 1-1-1, Makiyama, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture No. 36 Hamada Heavy Industries, Ltd. (56) References JP-A-2-102151 (JP, A) JP-A-1-70843 (JP, U) Jiko 61-6944 (JP, Y2) (58) Investigated Field (Int.Cl. ⁷ , DB name) C04B 5/02

Claims (3)

(57) [Claims] 1. First and second rotary drums having different angles of impact surfaces of blades, which are replaceably mounted on an outer peripheral surface, against a molten slag, are juxtaposed in the front-rear direction, and flow down to the first rotary drum. In the granular slag manufacturing apparatus in which the supplied molten slag is caused to fly by the first and second rotating drums and rapidly cooled to be granulated, one surface of each of the blades may collide with the first rotating drum. And the other surface is a collision surface of the second rotating drum, and the blade attached to the outer peripheral surface of the cylindrical portion of the first and second rotating drums is a dual-purpose blade. Equipment for manufacturing granular slag. 2. A granular slag manufacturing apparatus that uses a rotary drum having a plurality of blades that can be replaced around and that causes molten slag fed down to be flown by the rotary drum and rapidly cooled to be granulated. At the base end of the blade, the bottom has a leg portion whose width is widened along the outer peripheral surface of the cylindrical portion of the rotary drum, and a tie plate that simultaneously presses the leg portion of an adjacent blade is provided on the rotary drum. A granular slag manufacturing apparatus characterized in that a head is loosely fitted into a long hole formed in a cylindrical body portion at a fixed angle and is screwed by a locking bolt which is locked at another angle. 3. A rotary joint for supplying and discharging water is mounted on a central rotary shaft, and a rotary drum for supplying cooling water to a blade which is replaceably mounted on an outer peripheral surface is used. An apparatus for manufacturing granular slag, which flies molten slag supplied downward and rapidly cools and granulates the molten slag. The apparatus is connected to a water supply pipe and a drain pipe formed on the rotary shaft on both sides of a cylindrical body of the rotary drum. A water supply chamber and a drainage chamber are provided, and a water supply port and a drainage port formed at both end portions of the blade are respectively connected to the water supply chamber and the drainage chamber via an intermediate joint such as a union or a flange. Equipment for producing granular slag.