JPS6120010Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a support device for a molten slag gutter in a ground slag production plant that blows out converter molten slag with a high-speed air flow to produce fine-grained ground slag.

In recent years, in order to effectively utilize converter molten slag generated in the converter steelmaking process, steel mills have begun to air crush the 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 production facility. 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, and 3 is located at the lower part of the gutter 2, with its tip opening located directly below the outlet of the gutter 2. A main nozzle 4 is disposed upward at a predetermined angle between the main nozzle and the gutter 2, and is an upper nozzle whose tip opening is located directly above the outlet of the gutter 2. Main nozzle 3 and upper nozzle 4
is connected to the blower 6 via dampers 5, 5 by piping.

Reference numeral 7 denotes a crushing chamber in which the tips of the gutter 2, main nozzle 3, and upper nozzle 4 are located facing the front opening surface 7a. A pulverized slag quantitative discharge device 9 is provided at the lower end opening of the hopper-shaped portion 8 .

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

12 is an exhaust port provided at the end of the top wall of the crushing chamber 7; 13 is an exhaust pipe connected to the exhaust port 12; 14
15 and 15' are dampers, and 16 is a conveyor for carrying out the crushed slag.

The molten slag contained in the tundish 1 flows out from the gutter 2, and is also sent to the blower 6.
The particles are blown away by high-speed airflows ejected from the main nozzle 3 and the upper nozzle 4 at a constant speed and volume, and fly within the crushing chamber 7. The molten slag blown into the crushing chamber 7 in this way is
While flying in the crushing chamber 7, it becomes spherical due to surface tension and is cooled from the surface to solidify. At the falling point, it becomes fine crushed blast slag A and is collected in the hopper-shaped part 8, which is then discharged into the quantitative discharge device. A predetermined amount is cut out from 9 and conveyed by a conveyor 16.

The heat of the molten slag and the blasted slag flying in the blasting chamber 7 is transmitted to the boiler tube 10 configuring the inner surface of the blasting chamber 7 by radiation or collision contact between the molten slag and the crushed slag, and the heat is transferred to the boiler tube 10 forming the inner surface of the blasting chamber 7 through radiation or collision contact between the molten slag and the crushed slag. The water flowing in the tube 10 is heated and turned into steam by the steam drum 11. This steam is effectively used as factory steam or for operating a steam turbine.

As described above, the molten slag becomes air-crushed slag with a constant particle size and is effectively used as aggregate and other materials, and the heat of the molten slag is also recovered.

In the above-mentioned air-pulverized slag manufacturing plant, the gutter 2 that guides the molten slag flowing out from the tundish 1 is easily worn out and often needs to be replaced. However, since the upper nozzle 4 is disposed above the gutter 2, the upper nozzle 4 must be temporarily removed before replacement, and the replacement work is laborious and takes a long time. Ta.

From the above-mentioned viewpoints, this invention provides a support device for a molten slag gutter in a wind-pulverized slag production plant that allows the molten slag gutter to be easily replaced in a short period of time. A trolley that can be freely connected to a molten slag outlet and on which a molten slag gutter can be placed, the tip of which is located below an upper nozzle from which blasting air is ejected; This system is characterized by comprising a running rail for the trolley, which is laid down below the fixed position of the trolley, and a chain for moving the trolley to which the trolley is latched.

Next, this invention will be explained with reference to examples and drawings.

FIG. 2 shows a side view of an embodiment of the device of this invention. The device of this invention consists of a truck 17 on which a molten slag outflow gutter 2 can be freely connected to a molten slag outlet 1a provided on the front wall of a tundish 1, and a truck 17 for running the truck 17. A rail 19 laid on the frame 18 directly below the tundish 1 and below the fixed position of the gutter 2 is engaged with chain wheels 21 and 22 on which a metal fitting 20 on the underside of the truck 17 is hooked. An endless chain 23 and a large diameter chain wheel 24 coaxial with the chain wheel 21.
an endless chain 26 meshed with a small diameter chain wheel 25 provided separately; a large diameter chain wheel 27 coaxial with the chain wheel 25; and a small diameter chain wheel 2 provided separately.
It consists of an endless chain 29 meshed with the chain wheel 8 and a handle 30 coaxial with the chain wheel 28.

The tundish 1 is placed on a frame 18 and can be lifted and moved by an overhead crane or the like.

On the trolley 17, trunnion supports 32, 32 (only one shown) that support trunnions 31, 31 (only one shown) protruding from the left and right sides of the tip of the gutter 2 are provided.
and a pedestal 33 that supports the lower surface of the rear end of the gutter 2, and wheels 34 are provided at the front and rear positions of the left and right side surfaces, respectively.

The tip of the gutter 2 installed in a fixed position is located between the upper nozzle 4 and the main nozzle 3.

Next, the operation when replacing a gutter using the device of this invention will be explained. First, the empty container 1 is lifted up by an overhead crane or the like and moved to another location. Next, when the handle 30 is operated to rotate the chain wheel 21 with which the chain 23 is meshed in the counterclockwise direction in the drawing, the trolley 17, which is fixed to the chain 23 rotating together with the metal fitting 20, is rotated as shown in the drawing. Rail 19 on the left
The nozzle 4 moves above the nozzle 4 and reaches a position removed from below the upper nozzle 4.

Here, if the gutter 2 is lifted by an overhead crane or the like, the trunnion 31 is separated from the top of the trunnion pedestal 32, and the gutter 2 is lifted.

After moving the gutter 2 to the required position in this way, lift the new gutter 2, and perform the reverse operation to remove the trolley 17 from below the upper nozzle 4.
place it on the cart 1 and operate the handle 30 again
7 to its old position, the new gutter 2 is set in the position shown.

Therefore, we decided to use the tandaitsu 1 that we had removed earlier.
By lifting it again using an overhead crane or the like and placing it on the frame 18, the gutter replacement work is completed and the air crushed slag manufacturing work can be resumed.

As mentioned above, according to the device of this invention,
Excellent effects are brought about, such as the ability to easily and quickly replace the molten slag gutter without requiring removal of the upper nozzle.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing the whole of the air crushed slag manufacturing equipment, and FIG. 2 is a side view showing an embodiment of the apparatus of this invention. In the drawings, 1... Tundishyu, 2... Molten slag gutter,
3... Main nozzle, 4... Upper nozzle, 7...
Wind crushing room, 17... Cart, 18... Frame, 19
...Rail, 23...Chain, 30...Handle, 31...Trunion, 32...Trunion pedestal, 33...Pass, 34...Wheel, A...Air crushed slag.

Claims (1)

[Scope of utility model registration request] A trolley that can be freely connected to a molten slag outlet provided in a tundish and on which a molten slag gutter can be placed, the tip of which is located below an upper nozzle from which blasting air is spouted; An air crushed slag manufacturing plant comprising: a running rail for a bogie laid across the fixed position below the molten slag gutter; and a chain for moving the bogie to which the bogie is latched. Support device for molten slag gutter in.