JPH059536A - Dust collecting device for mobile type molten iron ladle - Google Patents

Abstract

PURPOSE:To collect fine dust developed during slag-off work. CONSTITUTION:In a mobile type molten iron ladle dust colleting device, two side walls 3 are opposed to each other in parallel in the travelling direction of a travelling carriage 1, on the travelling carriage 2 having opening hole part 1 opened to the lower part and plural air blowing pipes 4 boring air blowing holes are set between this faced two side walls so as to develop artificial whirlwind. Further, a hood 6 having gas venting hole 5 at upper end between two side walls 3 is provided so as to send the fine dust in the molten iron ladle sucked from the opening hole part 1 with the artificial whirlwind to a dust collector through the gas venting hole 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable hot metal ladle dust collecting device used for collecting dust generated when scraping slag covering hot metal in a hot metal ladle.

[0002]

2. Description of the Related Art The hot metal discharged from a blast furnace is stored in a hot metal ladle, transported to a steelmaking plant, and charged into a converter for refining. The upper surface of the hot metal in the hot metal ladle is covered with the slag mixed during tapping and the slag of heat generating material to keep the hot metal warm, but when these are charged into the converter, impurities (P, S
Etc.), the hot metal ladle is tilted before the converter is charged, and the slag and the slag of the heat generating material are scraped off with a scraping plate (referred to as slag scraping).

In the above-mentioned slag scraping work, the slag that has been conventionally scraped is scraped off to the slag pan, but a part of the slag that is in the process of being dropped is brought into contact with the air to be cooled and changed from a fluid to a solid to become dust. Since this dust generates an upward airflow due to high temperature in the surroundings, it often scatters upward in the atmosphere, causing deterioration of the work environment and causing pollution, and it is necessary to prevent dust generation. is there.

Conventionally, the dust that has fallen inward and downward of dust generated during the scraping work has been collected through a fixed hood, but the dust that rises upward has not been collected.

[0005]

In a conventional fixed hood, when dust that is flying upwards among dusts generated during scraping work is to be collected, the dust is raised above the converter yard that moves the hot metal ladle. Since a fixed hood with a height of 5 m is projected at about 4 m square, there is a problem that it is an obstacle to moving a large hot metal ladle.

The present invention solves the above-mentioned problems of the prior art, can collect the dust rising upward in the dust generated during the scraping work, and does not interfere with the movement of the hot metal ladle. An object of the present invention is to provide a dust collector for a hot metal ladle.

[0007]

According to another aspect of the present invention, there is provided a movable hot metal ladle dust collector having two side walls facing each other in parallel with a traveling direction of a traveling carriage on a traveling carriage having an opening opening downward. A plurality of air blowout pipes having air blowout holes are provided between the two side walls facing each other so as to generate an artificial tornado, and an exhaust hole is provided between the upper ends of the two side walls. A hood having the above is provided, and the dust of the hot metal ladle sucked from the opening by the artificial tornado is sent to the dust collector through the exhaust hole.

[0008]

In the movable hot metal ladle dust collecting apparatus according to the present invention, two side walls are opposed to each other on the traveling carriage in parallel with the traveling direction of the traveling carriage, and an air blowout hole is provided between the two opposed side walls. A plurality of perforated air blowing pipes are arranged to generate an artificial tornado, and a hood having an exhaust hole is provided between the upper ends of the two side walls.

During the work of scraping the hot metal ladle, the traveling carriage is run so that the opening of the traveling carriage is located above the hot metal ladle, and then air is blown from a plurality of air blowing pipes to face each other. An artificial tornado is formed between the two side walls. The dust that rises up among the dust generated during the scraping work is sucked into the tornado by the artificial tornado from the opening of the traveling carriage and sent to the dust collector through the exhaust hole of the hood.

When the scraping work is finished, the traveling carriage is moved backward so that it does not interfere with the movement of the hot metal ladle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A moving type hot metal ladle dust collecting apparatus according to an embodiment of the present invention will be described with reference to FIG. In the movable hot metal ladle dust collecting apparatus according to the first embodiment of the present invention, two side walls 3 are made to face each other in parallel to the traveling direction of the traveling carriage 2 on a traveling carriage 2 having an opening 1 opened downward. A plurality of air blow-out pipes 4 having air blow-out holes are provided between the two side walls 3 thus formed so as to generate an artificial tornado.
A hood 6 having an exhaust hole 5 is provided between the upper ends of the side walls 3 of the sheets, and dust of the hot metal ladle 21 sucked from the opening 1 by an artificial tornado is passed through the exhaust hole 5 and a dust collection duct 22 configured to be expandable and contractible. It is designed to be sent to a dust collector (not shown). In addition, the damper 2 can be adjusted to adjust the exhaust air volume.
This is possible by changing the opening degree of 3.

The traveling carriage 2 can travel on the rails 8 by the wheels 7, and the traveling carriage 2 is moved to the tip portion of the rail 8 during the scraping work so that the traveling carriage 2 can travel.
The opening 1 of the above is set to be as high as possible right above the noro drop point of the hot metal ladle 21. Then, air is blown from a plurality of (four in FIG. 1) air blowing pipes 4 to form an artificial tornado. When air is blown from each air blow pipe 4, an air curtain is formed in a direction in which the air is blown from each air blow pipe 4. Each of the air curtains faces the tangential direction of the virtual rotating column set in the middle of the plurality of air blowing pipes 4, and the air blowing direction is the same as the rotating direction of the virtual rotating column.

By doing so, a swirling airflow is generated in the space surrounded by the air curtain, and this turns into an artificial tornado, and the dust generated during the scraping is sucked from the opening 1 of the traveling carriage 2. Then, the sucked dust is collected in the hood 6 and sent to the dust collector through the exhaust hole 5.

This dust collecting device is provided on each of the two side walls, which is 4 in length and width.
Since it is large with m and height of 5 m, even if you try to make an artificial tornado with only a plurality of air blowing pipes 4 and try to collect dust, the ideal tornado is not formed due to the surrounding air flow,
Since the dust collection does not work well, the influence of the air flow is eliminated by the two side walls.

Table 1 shows the amount of air required for dust collection when dust is collected using a conventional fixed hood and when it is collected by the movable hot metal ladle dust collector of the present invention, and the equipment cost (fixed This is a comparison of the power consumption and the dust collector required when using the type hood), but it is found that it is more economical to collect dust with the mobile hot metal ladle dust collector of the present invention.

[0016]

[Table 1]

[0017]

Industrial Applicability According to the present invention, it is possible to inexpensively collect the dust generated during the lapping work of the hot metal ladle and flying in the air.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a device configuration of a moving type hot metal ladle dust collecting device according to an embodiment of the present invention.

[Explanation of Codes] 1 Opening of traveling vehicle 2 Traveling vehicle 3 Side wall 4 Air blowing pipe 5 Exhaust hole 6 Hood 7 Wheel 8 Rail

Front Page Continuation (72) Inventor Yasuke Ishiguro Marunouchi 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan KK (72) Inventor Goshi Goi Marunouchi 1-2-2 Marunouchi, Chiyoda-ku, Tokyo In the company

Claims (1)

Claim: What is claimed is: 1. A pair of side walls are made to face each other in parallel with a traveling direction of the traveling carriage on a traveling carriage having an opening opening downward, and air is provided between the two side walls facing each other. A plurality of air blowout pipes having blowout holes are arranged to generate an artificial tornado, and a hood having an exhaust hole is provided between the upper ends of the two side walls, and the opening portion is formed by the artificial tornado. A movable type hot metal ladle dust collecting device, characterized in that the dust of the hot metal ladle sucked from the air is sent to the dust collector through the exhaust hole.