JP3321880B2 - Electrode support equipment for electric furnaces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode supporting apparatus for an electric furnace, and more particularly to an electrode supporting apparatus for an electric furnace having electrodes for arc heating or resistance heating.

[0002]

2. Description of the Related Art Generally, in an arc furnace for melting and refining metal materials and melting waste such as incineration ash from municipal solid waste, three columns are vertically erected on the side of the furnace body. An electrode gripper is provided at the distal end of a cantilever type electrode support arm having a base end portion fixed to the column to grip the electrode.

However, the above-mentioned electrode supporting device requires a large installation space on the side of the furnace body for installing the column and its driving device, and the device is large and complicated, and the electrode supporting arm and the long and heavy weight are required. A large-capacity and large-capacity drive was also required to drive the columns up and down.

In the above-mentioned arc furnace, a small-sized main material generally used for melting and auxiliary materials such as alloys and additives for component adjustment are all placed on the furnace lid at a position closer to the furnace wall than the electrode group. Since the furnace was charged from the provided inlet, it was difficult to supply the material to the central part of the furnace where heat from the electrodes was efficiently transmitted, resulting in poor thermal efficiency.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. The first object of the present invention is to provide an electric power supply having a compact and simple structure and requiring no space for installation on the side of the furnace body. An object of the present invention is to provide a furnace electrode support device.

A second object of the present invention is to provide an electrode support device for an electric furnace, which can charge a material into a central portion of the furnace and can improve the thermal efficiency of the electric furnace. .

[0007]

In order to achieve the above object, an electrode supporting apparatus for an electric furnace according to the first invention of the present application comprises:
Extends up and down to a position above the furnace lid that is separated from the furnace body
One column is provided concentrically with the furnace body, a plurality of electrode grippers for gripping an electrode penetrating the furnace lid are supported on the column so as to be able to move up and down, and a vertical drive for driving the electrode gripper up and down. Machine.

[0008] The electrode supporting apparatus for an electric furnace according to the second invention of the present application is provided with an upper and lower position at an upper position apart from a furnace cover over a furnace body.
A single column extending in the direction is provided concentrically with the furnace body,
A plurality of electrode grippers for gripping electrodes penetrating the furnace lid,
The electrode gripper is supported by the column so as to be movable up and down.
In addition to having a lifting drive that moves, the column is formed of a tube having a charging path inside, and the upper end of the charging path is connected to a material supply device, and the lower end is connected to a charging port provided in the furnace lid. , Respectively.

In the electrode supporting apparatus for an electric furnace according to the second aspect of the present invention, a charging port is provided in the furnace lid, for example, at a position closer to the furnace wall than the electrode group, separately from the charging path of the column, and the charging port and the charging port are provided. The material may be shared by the two passages (for example, divided into a main material and a sub-material) and charged into the furnace.

[0010]

In the electrode supporting apparatus for an electric furnace according to the first aspect of the present invention, the electrode gripper for gripping each electrode is driven up and down along one common column disposed above the furnace. It is not necessary to dispose a conventional support post on the side of the furnace body or a long electrode support arm extending from the support portion to the vicinity of the center of the furnace lid, and the weight to be driven by the lifting drive can be reduced.

In the electrode supporting apparatus for an electric furnace according to the second aspect of the present invention, the material can be supplied to the central part of the furnace from the introduction path of the support column through the inlet of the furnace lid, and the electrode can be efficiently used. Heated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is an arc for dissolving municipal waste incineration ash.
2 is a furnace body, 3 is a discharge port of the molten slag 4, and 5 is a furnace cover put on the furnace body 2. Reference numeral 6 denotes a charging port provided in the furnace lid 5 for charging a material, and 7 denotes an electrode through hole for inserting an electrode 8. 9 is a foundation for supporting the furnace body 2.

On the other hand, 11 is an abutment fixed on the floor 12 of the building, 13 is a support having its upper part fixedly mounted on the support 11, and this support 13 is located above the furnace lid 5 and at the center line of the furnace body 2. It is provided concentrically with 2a. The support column 13 is made of steel pipe, and has an input passage 13a formed therein.
The upper end of the container is provided with a material supply shutter 15 leading to a hopper (not shown) for supplying material 14 made of municipal waste incineration ash.
It is connected. The lower end of the charging path 13a is connected to the charging port 6 at the center of the furnace lid via a flexible duct 16. The column 13 may have a water cooling structure as a measure against overheating from around.

Reference numeral 21 denotes an electrode gripper for gripping the electrode 8, which is a clamp shutter driven by an air cylinder 22.
23, and is connected to a power supply by a cable (not shown). Reference numeral 24 denotes a guide shoe attached to a side end of the electrode gripper 21 via an electrical insulating plate 25.
The guide shoe 24 is vertically movably guided along a vertically extending guide rail 26 fixed to the outer peripheral portion of the column 13.

Numeral 27 designates a lifting drive for driving the electrode 8 up and down. The lifting drive is provided with a winding drum 30 for winding a wire rope 29 on the output shaft of a motor 28 mounted on the support 11. The tip is connected to the electrode holder 21.
Reference numeral 31 denotes a flexible seal device for connecting the lower part of the electrode gripper 21 and the electrode through hole 7.

In the arc furnace 1 having the above structure, the material 1
4 is supplied into the furnace body 2 through the charging path 13a, the electrode 8 is energized, and the motor 28 is controlled by a known control method in accordance with a detected value of the electrode current and the like to raise and lower the electrode gripper 21. 8, the material 14 is melted by the arc discharge.
The molten slag 4 is taken out from the outlet 3. The material 14 is supplied to the central portion of the furnace body 2 which receives the arc heating efficiently, and high thermal efficiency is obtained.

The present invention is not limited to the above embodiment. For example, the support 13 is dedicated to electrode support, and the supply of the material 14 into the furnace body 2 does not pass through the support 13 and the charging port 6 Alternatively, it may be performed from a charging port separately provided in the furnace lid 5.

Further, the electrode gripper 21, the lifting guide mechanism, the lifting drive 27, and the like may be of another type. Further, the abutment 11 may be traversable sideways as a trolley type, or may be supported on a foundation 9 supporting the furnace body 2 via a support leg or the like (not shown).

The present invention also relates to a resistance furnace such as an electric refining furnace having an electrode similar to the arc furnace in addition to the arc furnace and performing heating and melting mainly by resistance heating of the material to be heated. Resistance furnace or buried arc furnace)
Also applies to

[0020]

As described above, according to the present invention,
There is no need to install a support on the side of the furnace body, nor does it require a long electrode support arm, so the electrode support device is compact and simple, and the electrode lifting and lowering drive can be small and small in capacity. No space is required for installation. Further, according to the second aspect, the material can be charged into the central portion of the furnace, and the thermal efficiency of the electric furnace can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view (a sectional view taken along the line BB of FIG. 2) of an arc furnace showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Arc furnace, 2 ... Furnace body, 2a ... Center line, 5 ... Furnace lid, 6
... Equipment entrance, 7 ... Electrode through hole, 8 ... Electrode, 11 ... Abutment, 1
3 ... Support, 13a ... Injection path, 14 ... Material, 15 ... Material supply shot, 16 ... Flexible duct, 21 ... Electrode gripper, 2
4 Guide guide, 26 Guide rail, 27 Elevating drive, 28 Electric motor, 29 Wire rope, 30 Winding drum.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F27B 3/08 F27B 3/20 F27D 11/08 H05B 7/109

Claims (2)

(57) [Claims] 1. A plurality of electrode grips for vertically holding a single pole extending vertically and concentrically with the furnace body at a position above the furnace cover over the furnace body and spaced apart from the furnace body and holding an electrode penetrating through the furnace body. An electrode supporting apparatus for an electric furnace, comprising: a lifting device that supports a vessel so as to be able to move up and down on the column and drives the electrode gripper to move up and down. 2. An upper part of a furnace cover placed on a furnace body is separated from an upper part of the furnace lid.
A column extending downward is provided concentrically with the furnace body,
A plurality of electrode grippers for gripping an electrode penetrating the furnace lid
Is supported on the column so as to be able to move up and down, and the electrode gripper is raised.
A loading port having a lifting drive for lowering the drive, wherein the support column is formed of a pipe body having a charging passage therein, and an upper end of the charging passage is provided in the material supply device, and a lower end is provided in the furnace lid. And an electrode supporting device for an electric furnace.