JPS6324100Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granulated slag manufacturing device, and more particularly to a granulated slag manufacturing device that effectively combines a rotating roll and a collision plate.

The following two methods are generally used to pulverize molten slag discharged from a blast furnace or the like.

(a) A method in which molten slag is dispersed and rapidly cooled using only pressurized water.

(b) A method in which molten slag is once mechanically dispersed and scattered, and then cooled with cooling water.

Ordinary granulated slag has been produced by the conventional method (a). That is, molten slag guided to a blown box in a slag gutter is pulverized by injecting pressure water, and this granulated slag is received by a stirring tank and sent to a dehydration tank in the form of slurry, where it is dehydrated and dried. It is manufactured through the following steps.

However, this method requires a high pressure of 4 to 5 kg/cm ² G and a large amount of cooling water to rapidly cool the molten slag by dispersing it only with high-pressure water. has the disadvantage of requiring a large amount of energy.

Next, as a conventional method (b), a method as shown in FIG. 1 is known. That is, the molten slag 4 guided by the slag gutter 2 collides with the rotating roll 6 provided below the slag gutter 2 to be dispersed and scattered, and the dispersed molten slag 4A is directly supplied to the cooling water 8. In this method, the cooling water 8 is dropped into a water tank 10 for storing the molten slag, or the cooling water 8 is sprayed in the form of rainwater from above the scattered molten slag 4A. However, this method has the disadvantage that the dispersion effect of molten slag is insufficient and that it cannot respond to fluctuations in the amount of slag supplied.

Furthermore, some granulated slag products require a high degree of vitrification as a quality requirement, while others do not require this and are satisfied with a mere sand-like quality. It is extremely difficult to control the quality of the molten slag, and although methods for obtaining high-density chemical products by controlling the temperature of the molten slag to be supplied have been disclosed, it is extremely difficult to put it into practical use as a mass production system.

Therefore, the quality of granulated slag products is determined by the specificity of the manufacturing equipment, and in addition, dispersion of molten slag and cooling technology are extremely important in the granulation process. It is no exaggeration to say that not only the manufacturing cost but also the quality of the finished product is affected.

The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional techniques in the production of granulated slag, to maximize the dispersion and scattering effect of molten slag, to be able to respond to changes in the amount of slag supplied, and to improve the quality of slag products. The aim is to provide an effective granulated slag manufacturing equipment that can also control quality.

The gist of the present invention is as follows.

That is, in a granulated slag production apparatus comprising a slag gutter that guides molten slag discharged from a blast furnace, and a rotating roll that causes the molten slag flowing down from the end of the slag gutter to collide and scatter,
A collision plate is disposed in front of the rotating roll so as to be able to move forward and backward with a variable distance from the rotating roll and to be tiltable with a variable collision angle, and further collides the scattered molten slag to rapidly cool and solidify it; a cooling water supply nozzle that is provided and causes cooling water to flow down onto the collision surface of the scattered molten slag of the collision plate; and a blowing gutter that is provided below the rotating roll and the collision plate that forces the fine solidified slag away with a water stream; This is a granulated slag manufacturing apparatus characterized by having the following.

An embodiment of the present invention will be described with reference to FIGS. 2, 3, and 4. The molten slag 4 guided by the slag gutter 2 flows down onto the rotating roll 6 provided below the gutter end, receives the rotational force of the rotating roll 6, scatters forward, and is dispersed into granular molten slag. The result is slag 4A. In front of the rotating roll 6, there is provided a collision plate 10 in the form of a wetted wall with cooling water 8 flowing on its inner surface, so that the scattered granular molten slag 4A collides with this collision plate 10 and is rapidly cooled and turned into granular solidified slag. 4B and falls onto the blowing gutter 12 provided below.

The collision plate 10 is provided so as to be movable forward and backward and tiltable, and is constructed as follows. That is, as shown in FIGS. 3 and 4, two support rollers 10B are installed on the left and right sides of the upper part of the collision plate main body 10A, and these support rollers 10B are connected to guides provided horizontally at both ends of the collision plate 10. It is designed to be able to move forward and backward on the rails 13. That is,
Brackets 7C are attached to both sides of the upper part of the collision plate main body 10A, and a piston rod 14 is connected to the bracket 7C via a shaft 7D.By the operation of an actuator 16 fixed to the guide rail 13, the piston rod 14 is moved back and forth. Therefore, the collision plate 10 is configured to be able to move forward and backward. One actuator 16 is provided on each side of the collision plate 10, but only one actuator 16 may be provided in the center.

As shown in FIG. 4, a tilting support bracket 7E is attached to the center of the lower part of the collision plate main body 10A, and a shank 7F is attached to the tilting support bracket 7E.
Although not shown, a tilting wire rope 18 is connected via a sheep 19.
Wire rope 1 by a drive device such as a winch
The tilting angle θ of the collision plate main body 10A can be adjusted by winding or unwinding the collision plate 8.

Other configurations may be used to adjust the forward and backward movement of the collision plate 10 and the tilt angle.

Further, a cooling water nozzle 20 is attached to the upper part of the inner surface of the collision plate main body 10A, and a cooling water hose 2
2. The cooling water 8 supplied via the valve 24 is made to flow down from the cooling water nozzle 20 along the inner surface of the collision plate main body 10A. As a result, the granular molten slag 4A that collides with the rotating roll 6 and is dispersed and scattered forward further collides with the collision plate main body 10A through which the cooling water 8 flows and rapidly cools and solidifies, becoming granular solidified slag 4B and disposed below. Blown gutter 1
2 falls on top. A water push nozzle 26 is provided at the rear of the blowing gutter 12, and since the water is poured over the entire surface of the blowing gutter 12, the fallen granular solidified slag 4 is removed.
B is swept away and collected in a tank provided downstream.

Although the structure and operation of the present invention have been described above,
When producing granulated slag according to the present invention, one of the features of the present invention is that the quality of the granulated slag can be controlled arbitrarily. That is, as shown in FIG. 2 by the present inventor, the molten slag 4 flowing down from the slag gutter 2 collides with the rotating roll 6 and is dispersed, and the cooling water 8 collides with the collision plate 10 flowing on the inner surface and is rapidly cooled. The distance from the first collision point to the rotating roll 6 during solidification to the collision plate 10 measured at the top of the collision plate 10 is set as a, and the collision plate 10 is then moved and the collision plate 10 is moved from the rotating roll 6. When comparing the results when granulated with the distance of (a+b), granulated slag product 4
It was found that the quality characteristics of B were different. That is, when the collision plate 10 comes into contact with the cooling water 8 after a short flight, as in the case of the distance a of the collision plate 10, a product suitable for cement with high glass quality is obtained.
It has been found that when the flying distance is as long as (a+b), a dense hard granulated slag product can be obtained although the glass quality is reduced.

The reason for the difference in the quality of the granulated slag products due to the difference in flying distance of the scattered molten slag 4A is considered to be as follows. That is, when the flying distance is long (a+b), the dispersed molten slag 4A is gradually cooled in the air before being cooled by the cooling water 10 of the collision plate 10, and then is cooled by the cooling water 8 of the collision plate 10. On the other hand, in the case of a short flight distance, the cooling water 8 of the collision plate 10 is immediately cooled with almost no air cooling.
This is thought to be due to the rapid cooling caused by the process. As described above, the quality of the granulated slag product according to the present invention depends on the flight distance of the dispersed molten slag 4A that collided with the rotating roll 6, so it is possible to control the quality of the granulated slag product using this characteristic. .
Examples thereof are described below.

That is, when granulated slag 4B was manufactured with the distance a from the rotating roll 6 to the collision plate 10 shown in FIG. 2 = 500 mm, the unit volume weight was Kg/.
I got a product of 1.0. When the distance to the collision plate 10 is increased to (a + b) = 1500 mm, the unit volume weight is
A product of 1.2 kg/kg was obtained. The former is suitable for use in cement, and the latter can be made to have a unit volume weight of 1.5 by further adjusting the particle size, and this type of dense granulated slag product can pass as fine aggregate for concrete. It is something.

As described above, by using the same apparatus and changing the position of the collision plate 10, it is possible to produce granulated slag products of different qualities.

As is clear from the above embodiment, the present invention provides a rotating roll 6 below the slag gutter 2, and causes the flowing molten slag 4 to collide with the rotating roll 6 to disperse and scatter the scattered molten slag 4A further forward. The granular solidified slag product is rapidly cooled and solidified by colliding with a wet wall-type collision plate 10 that can freely move back and forth and tilt, and falls into the blowing gutter 12 below.
By using a structure in which the water is washed away and collected in a tank by flowing water, the following effects can be achieved.

(b) The molten slag is made fine by rotating rolls and then rapidly cooled by a collision plate through which cooling water is flowed, so a large amount of treated water is not required as in conventional granulated slag production equipment. Moreover, the amount of energy used can be extremely reduced.

(b) By adjusting the rotation speed of the rotary roll and the angle of the collision plate, it is possible to respond to fluctuations in the amount of molten slag supplied, making mass production possible.

(c) The quality of the granulated slag product can be controlled by adjusting the distance from the rotating roll to the collision plate.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional granulated slag manufacturing apparatus using rotating rolls, and Fig. 2 is a sectional view illustrating an overview of the granulated slag manufacturing apparatus according to the present invention and the effect of changing the installation position of the collision plate. , FIG. 3 is a sectional view showing an embodiment of the forward and backward movement and tilting mechanism of the collision plate in the present invention, and FIG. 4 is a front view of the collision plate as viewed from the - line arrow in FIG. 3. 2... Slag gutter, 4... Molten slag, 4A...
Fine-grained molten slag, 4B... fine-grained solidified slag,
6...Rotating roll, 8...Cooling water, 10...Collision plate, 12...Blown gutter, 13...Guide rail, 1
4... Piston rod, 16... Actuator, 18... Wire rope.

Claims (1)

[Scope of utility model registration request] A granulated slag manufacturing apparatus comprising: a slag gutter that guides molten slag discharged from a blast furnace; and a rotating roll that causes the molten slag flowing down from the end of the slag gutter to collide and scatter. a collision plate which is arranged so as to be able to move forward and backward with a variable distance from the rotating roll and to be tiltable with a variable collision angle, for further colliding the scattered molten slag to rapidly cool and solidify it; It is characterized by having a cooling water supply nozzle that causes cooling water to flow down onto the collision surface of the scattered molten slag, and a blowing gutter that is provided below the rotating roll and the collision plate and that forces the fine solidified slag away with a water stream. Granulated slag manufacturing equipment.