JPS5810968B2 - Dust collector in converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collector in a converter that collects, sucks, and digests dust gas generated in large quantities from the pig iron receiving port during charging of hot metal in the converter and before and after the charging of hot metal. .

Generally, when scrap, hot metal, etc. are charged into a converter, a large amount of dust gas containing iron oxide fine particles and fume is generated from the receiving port, and this dust gas is diffused outside. This was a serious problem as it significantly worsened the working environment and caused air pollution.

Therefore, at present, a hood is installed to collect the dust gas.
Some hoods are designed to suck and conduct the dust gas collected by this hood and then put it into a dust collector for cleaning. In order not to interfere with pot work, that is, with scrap and hot metal charging operations, it can only be installed above the pig iron receiving port. A large amount leaked outside, making it impossible to achieve a sufficient smoke collection effect.

This invention was made in view of the above circumstances, and its purpose is to completely surround the outside of the open side of the pigtail receiving port of a converter with a hood at all times to remove dust gas generated from the receiving port. In addition to being able to collect all the smoke reliably and conduct smoke to the dust collector without leaking to the outside, when charging scrap, hot metal, etc., a part of the hood can be opened as much as necessary for the charging operation. An object of the present invention is to provide a dust collection device for a converter with extremely high smoke collection efficiency, which allows charging of scrap, hot metal, etc., while suppressing leakage of dust gas to the outside as much as possible.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a converter that is tiltably supported within a support frame 2. As shown in Figure 2, this converter 1 has a receiving port 1a opened obliquely upward near the front side of the support frame 2. Scrap, hot metal, etc. are charged while tilting forward as much as possible.

The scrap charging work is carried out using an overhead crane 4 or a trolley (not shown) that can run on the work floor 3 located at an appropriate height on the front side of the support frame 2. This is carried out via a molten metal vortex 5, etc., which is suspended by an overhead crane 4 installed at the upper end of the frame 2.

In order to be able to collect the dust gas generated from the pig iron receiving port without any leakage without interfering with such charging work, when the converter 1 is tilted diagonally forward in preparation for charging hot metal as described above, the A fixed hood 6 is provided so as to surround the open vicinity and outer periphery of the pigtail receiving port 1a.

That is, the fixed hood 6 is a vertical, substantially flat box-shaped box with an open bottom end that is fixedly supported near the front surface of the support frame 2, and includes a top plate 6a that projects forward from near the top end of the support frame 2, and a top plate 6a that projects forward from near the top end of the support frame 2. A front plate 6b and both side plates 6c are arranged at positions extending from the front edge and both side edges of the plate 6a to the work floor 3, respectively.
, 6c, and a rear plate 6d disposed at a position extending from the rear end edge of the top plate 6a to an appropriate height that does not interfere with the tilting movement of the converter 1.

Further, a converter 1 is provided in the center of the front plate 6b of the fixed hood 6.
An opening 7 is provided in order to widen the front of the pigtail receiving port 1a when the iron receiving port 1a is tilted forward.

Furthermore, a pair of movable hoods 8, 8 are provided outside the front plate 6b of the fixed hood 6 to open and close the opening 7.

These movable hoods 8, 8 are the front plate 6b of the fixed hood 6.
The rollers 10 and 1 are connected to the guide rail 9 provided on the upper surface of the top plate 6a of the fixed hood 6.
0, and the lower end is connected to the work floor 3.
They are slidably connected to guide rails 11 provided on the upper surface via rollers 12, 12, respectively, and can be slid to open and close from the center of the front plate 6b of the fixed hood 6 like a double-opening sliding door. In addition, there are rollers 12 in the vicinity of each roller 12, 12 on the lower end side.
An electric motor 13.13 is incorporated to drive the motor in forward and reverse rotation.

In addition, 14° 14 in the figure is a pair of ducts with dampers 14a, which are communicated with each other by opening one end of the fixed hood 6 near the upper end of both side plates 6ct6C.
These ducts 14 and 14 hang down from outside positions on both sides of the fixed hood 6, and have dust collectors (not shown) installed at appropriate locations at the ends.
The dust collector is connected to the dust collector so that the dust gas collected in the fixed hood 6 is conducted to the dust collector using the smoke suction power of the dust collector.

When the converter 1 is tilted as shown in FIG. 2 in preparation for charging hot metal, etc., the front opening T of the fixed hood 6 is opened by the pair of movable hoods 8, as shown in FIG. All of the dust gas generated from the pig iron receiving port 1a of the converter 1 is collected in the fixed hood 6 and transferred to the duct 1 without leaking to the outside.
From 4.14 onwards, it is connected to the dust collector and cleaned.

When the container and hot metal ladle 5 are moved from the front by a trolley or other appropriate method such as an overhead crane in order to charge scrap and hot metal into the converter 1, the electric motor 1
3.13 is activated to open both movable hoods 8 and 8,
The front opening 7 of the fixed hood 6 is opened as much as necessary for charging the scrap, hot metal, etc., as shown by the solid line in FIG. 3.

In this way, the charging work of scrap, hot metal, etc. is performed in a state where it is isolated from the outside air as much as possible without interfering with the charging work, and the dust gas generated from the pig iron receiving port 1a is leaked to the outside as in normal times. The dust is collected in the fixed hood 6 without any problem, and the dust is passed through the duct 14, 14 to the dust collector.

After the above-mentioned charging operation is completed, as the scrap container and the hot metal ladle 5 move back, the movable hoods 8, 8 are quickly moved to the center by the operation of the electric motors 13, 13, and the front opening 7 of the fixed hood 6 is closed. Thereafter, all the dust gas generated from the pig iron receiving port 1a is collected and sucked and cleaned by the dust collector without leaking to the outside.

Since this invention has been made as described in detail above, in the tilted position for charging scrap and hot metal into the converter, the front and rear and both side plates of the fixed hood and the movable hood connect the vicinity of the open side of the pig iron receiving port and the outer periphery of the fixed hood. It has a structure in which the front plate opening of the fixed hood can be completely surrounded by the movable hood, and in this state, when charging work of scrap and hot metal, the front plate opening of the fixed hood can be opened by moving the movable hood as much as necessary for the charging work. The dust gas generated from the converter's piglet receiving port during normal operation during loading and after the charging work is concentrated in a local area near the receiving port without being diffused to the surroundings, ensuring that the dust gas is collected by the dust collector. It is a highly efficient dust collection device for converter furnaces that can perform conductive processing.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; Fig. 1 is a schematic front view, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 shows the movable hood in an open state. FIG. 1...Converter, 1a...Pigtail port, 6...Fixed hood, 7...
...Opening part, 8...Movable hood, 14...Duct.

Claims (1)

[Claims] 1. A fixed hood consisting of a top plate, front plate, side plates, and rear plate arranged to surround the outside of the open side of the pig iron receiving port when the converter is in a tilted position in preparation for charging hot metal. , an opening provided in the front plate of this fixed hood, and a slide on the fixed hood so that this opening is always closed and opened only as much as necessary to enable the charging operation when charging scrap and hot metal. A converter comprising: a movable hood that is movable; and a duct that communicates at one end with the fixed hoop to suck and conduct the dust gas collected in the fixed hood to a dust collector at an appropriate location. Dust collector.