JPS6042257A - Equipments for manufacturing wind-granulated slag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wind-crushed slag production facility for producing fine-grained wind-crushed slag by blowing away converter bath molten slag with a high-speed air flow.

In recent years, in order to effectively utilize the converter molten slag generated in the converter steelmaking process, ironworks have begun to air crush the bath molten slag to make it into fine particles to produce air crushed slag.

FIG. 1 is a schematic explanatory diagram showing the entire wind-pulverized slag manufacturing apparatus. In the drawing, 1 is a tundish in which molten slag is stored, 2 is a gutter provided in the tundish 1 from which the molten slag flows out, 3 is a lower part of the gutter 2, and its tip opening is located directly below the outlet of the ridge 2. The main nozzle 4 is disposed upward at a predetermined angle between the main nozzle and the gutter 2, and is a two-part nozzle whose tip opening is located directly above the outlet of the gutter 2. The main nozzle 3 and the upper nozzle 4 are connected to a blower 6 via dampers 5, 5 by piping.

7 has the gutter 2 and the main nozzle 3 on its front opening surface 7a.
and an air crushing chamber in which the tip of the upper nozzle 4 is positioned facing, the bottom of which extends from a plurality of hopper-shaped parts 8;
A pulverized slag quantitative discharge device 9 is provided at the lower end opening of each hopper-shaped portion 8 .

The blasting chamber 7 has a top wall 7b, a side wall 7c, a rear wall 7d, and the inner surface of the hopper-shaped portion 8, each of which is composed of a large number of boiler tubes 10, and these boiler tubes 10 are connected to a steam tram 11. The entire wind crushing room 7 serves as a boiler room.

Reference numeral 12 indicates an exhaust port provided at the end of the top wall of the crushing chamber 7; 13 indicates an exhaust pipe connected to the exhaust port 12; and 4 indicates an exhaust port provided in the middle of the exhaust pipe 13 for utilizing the heat of the exhaust gas. 15 and 15' are dampers, and 16 is a conveyor for carrying out the crushed slag.

Reference numeral 17 denotes a slag pot for supplying molten slag into the tundish 1. By lifting the slag pot 7 with a crane 18 and tilting it, the molten slag contained in the pot is fed into the tundish. Ru.

The molten slag contained in the kunditshu 1 flows out from the gutter 2 and is blown away by a high-speed air flow ejected from the main nozzle 3 and the upper nozzle 4 at a constant speed and volume by the blower 6, and is then blown into the crushing chamber 7. Fly inside. The bath molten slag blown into the blasting chamber 7 in this way becomes spheroidized by surface tension while flying inside the blasting chamber 7, and is cooled from the surface and assimilated, and at the point of fall, it becomes fine particles. The crushed slag is collected in the hopper-shaped part 8, and a predetermined amount is cut out from the quantitative discharge device 9 and transferred to the conveyor 16.
transported by.

The heat of the molten slag and the blasted slag flying in the blasting chamber 7 is transferred to the boiler tube that forms the inner surface of the blasting chamber 7]0
The water flowing in the boiler tube 10 is heated by radiation or by the collisional contact of the molten slag and the blasted slag, and is turned into steam by the steam drum 11. This steam is effectively used as factory steam or for operating a steam turbine.

However, in the conventional apparatus described above, in order to supply the converter molten slag into the tundish 1, the bath molten slag discharged from the converter is received in a slag pan mounted on a trolley 2, and The slag pan mounted on the trolley is then lifted by a crane 18 installed in the building of the wind crushed slag manufacturing factory, and the crane 18 is transported to the installation location of Tanditshu J. In addition to moving it, I also tilted it as described above, which resulted in a total of 9 movements.

For this purpose, the air-crushed slag manufacturing factory has a mechanism in which the slag pot 17 on a trolley is lifted up and moved at the installation location of the tundish, and then the slag pot 17 is tilted to supply the molten slag in the slag pot 17 into the dandish. crane 18 and a separate room are required.

Therefore, the above equipment requires a large amount of cost.''2.
The slag pot 17 is transferred from the trolley to the crane 18, and the slag pot 17 is transferred to the tundish 1 by the crane 18.
Since it takes time to transfer the slag to the slag pot, there is a problem that the molten slag in the slag pot cools and solidifies and adheres to the pot.

From the above-mentioned viewpoints, the present invention provides an equipment for manufacturing air-crushed slag that can quickly supply bath molten slag to a tundish and requires less equipment cost. a tundish that directly receives the molten slag from the slag pan on the tundish, and a tundish that blows out the molten slag discharged from the tundish at a constant wind speed and volume along the moving path of a cart on which a slag ladle containing The slag is characterized in that it is provided with a crushing chamber that produces fine-grained crushed slag by blowing it away with a high-speed air flow.

Next, this invention will be explained based on the drawings, and FIGS. 1 and 2 are schematic explanatory diagrams of the pulverized slag manufacturing equipment of this invention. Second
In the figure, 19 is, for example, three converters 1.9A,
Converter factories 19B and 19C are installed, and 21 is a crushed slag manufacturing factory.

20 is a track for moving trolleys carrying slag pans from the converter factory 19 to the crushed slag manufacturing factory 21;
has branch lines 20A, 20B, and 20C leading to three converters 19A, 19B, and 19C, respectively. 22 is a yard for slow cooling of molten slag, which is arranged along the railway line 20 and in parallel with the air-crushed slag manufacturing plant 21.

As shown in FIG. 3, in the wind-crushed slag manufacturing factory 21, a tundish 1 is located close to the track 20, and a bogie 23 is located 2° above the track.
The molten slag in the pot can be directly received from the slag pot 24 mounted on the slag pot by tilting the slag pot 24. Tanditsh 1 has gutter 2, and gutter 2
A main nozzle 3 is provided directly below the discharge port, and the crushing chamber 7 is arranged so that the opening surface 7a faces the tips of the gutter 2 and the main nozzle 3.

The operation of this invention will be briefly explained. For example, the molten slag discharged from the converter 19A is stored in a slag pot 24 on a trolley 23 waiting on the track 20A. The cart 23 containing the molten slag in the slag pot 24 is moved to the crushed slag manufacturing factory 21. And slag pot 24
By tilting the slag, the bath melt slag in the slag pot 24 is supplied to the tundish 1.

The molten slag flowing out from the gutter 2 of the tanditshu 1 is blown away by a high-speed airflow that is ejected from the main nozzle 3 and the upper nozzle (not shown) at a constant speed and volume, and as it flies inside the crushing chamber 7. It is cooled and solidified to become fine-grained air-crushed slag.

Thereafter, in the same manner, the molten slag discharged from the converters 19B and 19C is stored in the slag ladle 24 on the cart 23, transferred to the air-crushed slag manufacturing factory 21, and placed in the slag ladle 24 in the tundish 1. Supplied by tilting.

In addition, since a slow cooling yard 22 is provided along the railway line 20 and in parallel with the wind-crushed slag manufacturing plant 21, the slag pan 24
When the solidified slag or molten slag adhering to the slag is to be annealed without turning it into air-crushed slag, the trolley 23 is moved to the annealing yard 22, the slag pot 24 is tilted, and the slag ladle 24 is moved to the annealing yard 22.
sludge.

The equipment of the present invention is constructed as described above, and since the molten slag is directly supplied into the tundish 1 from the slag ladle 24 of the cart 23'', the slag ladle is moved to the tundish as in the conventional manner. Sudame crane,
There is no need to install a continuous speed system for suspending the crane, and the equipment cost can be reduced. In addition, since there is no need to transfer the slag pot from the trolley to the crane, the time spent in the trench supplying molten slag to the tundish is greatly shortened, and the amount of coagulation and adhesion of bath molten slag in the slag pot is extremely reduced, resulting in higher operating efficiency. can be improved.

As described above, according to the present invention, it is possible to quickly supply the bath melt slag to the tundish, and the equipment cost can be reduced, resulting in excellent industrial effects.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a conventional wind-pulverized slag manufacturing device;
FIG. 2 is a schematic explanatory diagram of the pulverized slag manufacturing equipment of the present invention;
FIG. 3 is a partial schematic side view thereof. In the drawings, 1...Tandish, 2...Gutter, 3...Twin nozzle, 4...Upper nozzle, 5, Damper, 6...Blower, 7...Blow crushing chamber, 7a...Front opening surface , 7b top wall,
7C side wall, 7d... Rear wall, 8... Hopper shaped part, 9... Stationary 4'Jr outlet device, 10... Boiler tube, 11...
・Steam drum, 12...exhaust port, 13...exhaust pipe,
14... Exhaust gas branch pipe,] 5, 15'... Damper, 16 Conveyor, 17... Bath molten slag pot, 18...
...Crane, 19...Converter factory, 19A, 1
9B, 19C...Converter, 20...Line, 2OA
, 20B, , 20C... branch line, 21...
・Air crushed slag manufacturing plant, 22... Annealing yard, 23... Trolley, 24...
slag pot. Applicant: Nippon Steel Tube Co., Ltd. Applicant: Mitsubishi Heavy Industries, Ltd. Agent: Natsuo Shioya (2nd person) Figure 1 Figure 2

Claims (1)

[Claims] Along the movement path of a truck on which a slag ladle containing converter bath molten slag is mounted, there is a tundish that directly receives the bath molten slag from the slag ladle on the truck, and a tundish that receives the bath molten slag discharged from the tundish. A facility for manufacturing air crushed slag, characterized in that it is equipped with a air crushing chamber for manufacturing fine-grained air crushed slag by blowing it with a high-speed air stream ejected at a constant wind speed and volume.