JPS5899684A - Raw-material charging bucket for arc furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a material charging packet for an arc furnace.

Among the soot and dust generated from arc furnaces, especially when adding raw materials, a large amount of combustible material containing impurities is put into the high-temperature furnace, and a large amount of smoke is generated, and the rising air blows a large amount of smoke directly above the furnace. This significantly worsens the working environment.

When using general building dust collection as a processing method,
This is undesirable from the standpoint of energy conservation, as a large amount of air other than smoke is sucked in due to the large number of openings in a steel factory, and large fans must be operated to process a large amount of air. In addition, when installing a local hood, it is most effective to install the hood directly above the smoke source, but since there are charging packets, hanging beams, hanging wires, etc. directly above the arc furnace, the hood should be placed on the side. only. For this reason, even if the suction air volume is increased, there is considerable smoke leakage.
Therefore, the arc furnace is completely surrounded by an enclosure, which is not effective. An opening for the wire sump was required, and for this purpose each large door was provided in the enclosure. In addition, a structure in which the crane itself would be placed inside the enclosure was also considered. However, for the former, the opening for the passage of the packets is very large and requires a very large door, and the opening for the passage of the wires is located just above the furnace, which is a very hot place for smoking. In order to prevent smoke leakage, it is necessary to install a duct around the opening to suck in smoke with a large amount of air, or to install an air curtain, but even so, it is far from perfect.

The object of the present invention is to provide an air conditioner with no smoke leakage and almost no inflow of ambient air.

Therefore, the present invention is characterized in that a lid having a dust collection duct is provided on the raw material charging packet body of the arc furnace, and the packet body and the lid constitute a dust collection 7-door.

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

FIG. 1 shows a first embodiment of the present invention. In the figure, 1 is a raw material charging packet body, and 2 is a lid placed on top of the packet body 1 to prevent smoke from escaping. ,
Reference numeral 3 denotes a lid-side dust collection duct attached to the lid 2, and the packet body 1 and the lid 2 constitute a dust collection hood.

4 is a suction duct connected to a dust collection duct of a dust collection device (not shown), 5 is a bottom cover attached to the packet body 1, 6 is an arc furnace, 7 is a raw material, and 9 is a suction duct connected to a dust collection duct of a dust collection device (not shown). This is an arrow indicating the direction in which smoke is drawn.

In the raw material charging packet for an arc furnace configured as shown in FIG. The discharge port is connected to the suction duct 4, and the dust is sucked by the dust collector as shown by the arrow 8 without overflowing to the outside of the furnace.

FIG. 2 shows a second embodiment of the present invention, in which the suction duct 4 is branched from the direct suction duct 9 of the arc furnace 6.
The duct 4 is provided with a switching pulp 10, and the duct 9 is provided with a switching damper 11. In the case of FIG. 2, if the damper 11 is closed and the pulp 10 is opened,
As explained in FIG. 1, the soot and dust generated from the arc furnace 6 does not overflow outside the furnace, and as shown by the arrow 8,
Suctioned by dust collector.

FIG. 3 shows a third embodiment of the present invention, and FIG. 4 is a plan view taken along the line A--A. Hang the lid 2' on the packet and make it larger than the packet main body 1 within a range that does not interfere with the arm 10.
A space is provided on the lower surface of the lid 2' to serve as a hood. If the diameter of the arc furnace 6 is larger than the diameter of the packet 1, leakage may occur to the outside of the packet 1 as shown by the arrow 11, but by using a lid 2' that also serves as a hood as shown in FIG.
Dust that leaks to the outside also passes through the core portion 2' and is sucked in by the dust collector as shown by arrow 8.

As described above, in the present invention, by providing a lid on the upper part of the raw material charging packet body and using the packet body or the body and the lid as a hood, the suction position is necessarily directly above the arc furnace which is the source of smoke. In addition, since the height of the packet body from the smoke source is low, there is no spread of soot and dust, so there is no smoke leakage, and there is almost no inflow of air from the surroundings, which improves suction efficiency and reduces the amount of smoke generated. A corresponding amount of suction is sufficient, and this means that the dust collection device does not need to be small. In addition, as a dust collection hood, you only need to place a lid with a dust collection duct on the main body of the raw material charging packet, so there is no need for a fixed frame or anything else, and it can be easily installed on existing equipment. The effects of the present invention, such as no need for an air curtain, are outstanding.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG.
FIG. 2 is a partially sectional front view of the second embodiment, FIG. 3 is a partially sectional front view of the third embodiment, and FIG. 4 is a partially sectional front view of the third embodiment.
The figure is a plan view taken along the line A--A in FIG. 3. 1... Raw material charging packet body, 2, 2'... Lid, 3
...Lid side dust collection duct, 4...Suction duct, 5...
・Bottom cover, 6... Arc furnace, 7... Raw material.

Claims (1)

[Claims] 1. A raw material storage for an arc furnace, comprising a raw material charging packet body for an arc furnace, and a lid-side dust collection duct that connects a discharge port to the lid by a lid provided on the upper part of the packet body. Incoming packet.