JP2590675B2 - How to replace the converter body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of exchanging a converter furnace body comprising a combination of a furnace body, a furnace bottom and a cone.

[0002]

2. Description of the Related Art When repairing a converter furnace body in a steelmaking factory, the conventional method, which has become the mainstream, has been to stop the operation and to dismantle the brick and construct the furnace at that position. Brick demolition and furnace construction takes 10 to 20 days, so a spare furnace to be used during that time is required.

On the other hand, in order to reduce the auxiliary equipment (utility such as exhaust gas) of such a standby furnace, a method of replacing and using a converter furnace body has been adopted.

[0004] However, the converter furnace body of mass production type is
The bricks are heavier for longer life (the largest in the converter factory)
A dedicated large-sized moving device for moving the converter body was required. That is, in this conventional method, as shown in FIG. 3, the converter furnace body 1 is moved on the bogie rail 2 from an operating position to a repair position on a dedicated bogie (not shown). Was. The laying of the rails 2 and the construction of the exclusive cart not only occupy a large area but also increase the construction cost. From the viewpoint of facility costs, it has been found that there is not much difference from simply providing one spare furnace.

[0005]

Challenges [0007] Thus, the present invention is to provide, even in heavy converter furnace body of the brick weight, without imposing a large cost to the mobile equipment of the converter furnace, BOF To replace the furnace body.

[0006]

In order to solve the above problems SUMMARY OF THE INVENTION According to the present invention, the furnace body, the furnace bottom and a method for exchanging converter furnace body comprising a combination of a cone section, a converter to be exchanged transferred to a dismantling and assembly positions the furnace body from the operating position, after separating at least the furnace bottom portion of the furnace bottom and the cone portion of the furnace the body at該解body-assembly position, the remaining
The part to be repaired is moved to the repairing position by a pouring crane and repaired while leaving the part.
The repaired part is dismantled by the pouring crane.
Transferred into the assembly position, the remaining parts at該解body-assembly position
After assembling the converter furnace with, and returning to the operating position the converter furnace body, the furnace body replacing the converter is provided.

[0007]

According to the converter body replacement method of the present invention, after the operation is stopped, the converter body to be replaced is first moved from the operation position to the dismantling / assembling position. Then, separating at least a furnace bottom of the furnace the body at該解body-assembly position. Note: Depending Iron crane capacity, also separating the cone section of the furnace the upper body. Each part after disassembly is lighter, so repair
Portion or main repaired portion comprising a portion that requires can that you move to the repair position by existing Note pig iron cranes,
So you repair. On the other hand, alternative take on the required repair parts repair
The completed (including new) or repaired parts are moved by the pouring crane to the dismantling and assembly position, where
It is combined with the remaining part at the time of dismantling and assembled in a converter furnace body. The converter furnace body is returned to operation position.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a converter furnace body 1 comprises a furnace body 3, a furnace bottom 4 and a cone 5 in combination. In recent years, with the widespread use of bottom blowing of a converter (gas blowing from the furnace bottom), a bottom replacement method in which only the bottom of the converter is separated and replaced has been partially adopted. The furnace bottom is separated from the furnace body for the purpose of reducing the weight when moving the part requiring repair . If the separation of the furnace bottom alone exceeds the capacity of the iron pouring crane, the cone is also separated from the furnace body to further reduce the weight.

The furnace body 3, the furnace bottom 4 and the cone 5
Since these converter steel shells are connected to each other by support brackets, bolts, welding, or the like, the connection is released by detaching these fasteners or cutting the welded parts by gas at the time of separation. When the components are connected via a spacer, the spacer may be removed and replaced.

A method for replacing a converter furnace body according to the present invention will be described with reference to FIG. After a shutdown, the roll to be replaced
The furnace body 1 is moved from the operating position to the dismantling / assembling position.
A trolley and a trolley rail may be used for this short distance movement.

The furnace bottom 4 is separated from the converter furnace body 1 at the disassembly / assembly position as described above. Furnace body 3 only supplement
In the case where repair is necessary, if the combined weight of the furnace body 3 and the cone portion 5 exceeds the capacity of the pouring crane 6, the cone portion 5 is separated in the same manner.

[0012] each part after it has been dismantled in this way, rolling
Since the weight of the furnace 1 is considerably smaller than that of the entire furnace body 1, the portion requiring repair can be moved to the repair position by an existing pouring crane. In the repair position, it is moved
Demolition and construction of the bricks that need to be repaired are performed.

On the other hand, parts that should be replaced for parts requiring repair
That is, exchanges (including new ones) repaired at the repair location
The replacement repaired portion is moved to the dismantling / assembling position by the same pouring crane 6. The repaired portion is combined with the remaining portion at the time of dismantling at the dismantling / assembly position to form a converter furnace body. And said converter furnace is returned to the operating position, thereby enabling operation.

[0014]

According to the furnace body replacement method of the present invention, it is possible to reduce the moving weight by dividing the converter furnace body, converter using a crane equipment for existing Note pig iron furnace Can be exchanged. Therefore, not only can the cost at the time of construction of the converter be significantly reduced, but also it can be implemented by slightly modifying the existing steelmaking plant.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view for explaining a divided structure of a converter furnace body.

FIG. 2 is a plan view for explaining movement of a converter furnace body when performing the method of the present invention.

FIG. 3 is a plan view showing equipment for implementing a conventional converter furnace body replacement method.

[Explanation of symbols]

1 converter furnace body, 2 bogie rails, 3 furnace body, 4
Furnace bottom, 5 cones, 6 Crane for pouring iron.

Claims (1)

(57) [Claims] 1. A furnace body, the furnace bottom and a method for exchanging converter furnace body comprising a combination of a cone section, transferred to the converter furnace body to be exchanged into disassembly and assembly position from the operating position,該解body & After separating at least a furnace bottom of the furnace bottom portion of the furnace the body and the cone portion at the assembled position, the remaining parts
To repair the main repaired portion to move to a repair position by the Note pig iron for the crane to leave, on the other hand, replace the該要the repaired portion
The repaired part is moved to the demolition / assembly position by the pouring crane ,
After also assembled in two rolling furnace furnace, and returning to the operating position the converter furnace body, the furnace body replacing the converter.