JP3261756B2 - Converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas hood structure for a converter, and more particularly to an improvement in the structure of a movable seal plate on the rear side of the hood.

[0002]

2. Description of the Related Art In a copper smelting process, a converter is generally used in the process of converting mat to blister copper, and a typical one is a so-called P.C. S. Mold converter 1.
In this converter 1, tuyere 2 is added to the molten metal of a mat (not shown).
When air is blown from, iron is oxidized to create slag,
The sulfur content is discharged from the furnace port 3 as sulfurous acid gas. A hood 4 is provided to completely collect the exhaust gas containing the sulfur dioxide gas, and the exhaust gas collected by the hood 4 is immediately guided to the waste heat boiler 5 and a part of the calorie is recovered as steam. It is sent to the sulfuric acid production equipment through the dust collector.

The hood 4 has a substantially rectangular cross section.
It comprises a front surface, both side surfaces, and a rear surface. The lower portion of the front surface is opened so as not to hinder the rotation of the furnace port 3, and the opening portion is provided with a door 6 that opens and closes by winding and unwinding a wire. On the other hand, the lower end of the rear surface of the hood is a movable seal plate 7, which can be opened and closed by an air cylinder 8. When the converter 1 is tilted forward, the molten metal scattered from the tuyere 2 when passing through the tuyere 2 or adheres and solidifies on the rear surface or side surface of the hood, which may be separated and fall as a lump, Used when removing this lump.

Incidentally, such a hood 4 has a small gap between the movable seal plate 7 and the furnace body so as not to hinder the tilting of the converter 1, and the outside air is sucked through this gap. If the outside air intake amount is too large, the sulfurous acid gas concentration will be reduced at the source, so it is desirable to make the gap as small as possible.

As described above, the rear hood is always exposed to the fall of the lump, and when the heavy lump is directly hit, the surface of the furnace body (furnace body protection plate usually called an apron (not shown)). Or the lower end of the movable seal plate 7 is deformed, and as a result, the gap is enlarged. In addition, a large lump may not be dropped between the furnace body and the movable seal plate 7. In any case, during operation, a large amount of outside air is absorbed from the widened gap. When the operation is completed, the depression and the deformation can be repaired.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the chance of hood deformation due to falling of a lump, and to minimize the gap area even if the lump is sandwiched between a movable sealing plate and a furnace body. To provide a simple food structure.

[0007]

In order to achieve the above object, a hood structure in a converter according to the present invention comprises a lower end of a movable seal plate on a rear side of the hood, and a plurality of shafts provided on an upper end of the opening. It is characterized in that the small seal plates with weights are independently opened and closed.

[0008]

[Function] The lower end of the movable seal plate on the rear side of the hood is opened, and a small seal plate with a weight is attached so that it can be opened and closed. There is no fear, and a large lump remains between the hood and the furnace body, and even if a part of the protrusion protrudes from the small seal plate, if the other small seal plate is closed, a gap that sucks outside air The area does not need to be so large.

The weight attached to the small seal plate is preferably selected so that the small seal plate is aligned at the same angle as the rear hood, and it is desirable to provide a wide blade on the side surface of each small seal plate. This is to prevent a gap from occurring even when the inclination of the adjacent small seal plate of the wide blade plate is different.

[0010]

FIG. 1 is a view conceptually showing a movable seal plate on the rear side of a hood according to the present invention. In FIG. 1, a movable seal plate 9 is connected to a rear hood 10 by a compass type connector 11 and is opened and closed by an air cylinder 8. The lower end of the movable sealing plate 9 is opened, and the shaft 1 provided at the upper end of the opening is opened.
2, two small seal plates 13 are attached, each of the small seal plates 13 has a wing plate 14 on a side surface thereof, and a weight 15 is attached to the outside of the small seal plate 13 so as to protrude outwardly, so that the small seal plate 13 can be opened and closed freely. I have.

[0011]

According to the present invention, the movable seal plate on the rear surface of the hood is less damaged and the amount of outside air sucked is also reduced.

[Brief description of the drawings]

FIG. 1 is a view conceptually showing a movable seal plate according to the present invention.

FIG. 2 is a diagram for explaining the overall structure of a converter and a hood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Converter 4 Hood 9 Movable seal plate in the present invention 13 Small seal plate 14 Wing plate 15 Weight

Claims (1)

(57) [Claims] 1. A horizontal cylindrical converter, and a hood for sucking exhaust gas from the converter, a lower end of a movable seal plate on a rear side of the hood being opened, and a plurality of shafts provided on an upper end of the open port. A converter in which small seal plates with weights are independently openably and closably mounted.