JPH0552477A - Raw material charging device for component adjustment of closed electric furnace - Google Patents

Abstract

(57) [Summary] [Purpose] The components can be adjusted quickly during operation. [Structure] A component-adjusting raw material bottle, a component-adjusting raw material receiving shoe attached to the upper portion of the bottle, and a component-adjusting raw material feeding pipe attached to the lower portion. And
Since the component adjusting raw material receiving shoe is connected to the compounding raw material receiving shoe and the component adjusting raw material feeding pipe is connected to the component adjusting raw material feeding nozzle provided on the furnace lid, it branches from the middle of the compounding raw material supply system. This is a device that allows only the ingredient-adjusting raw materials to pass through. Therefore, the component adjusting raw material stored in the component adjusting raw material bottle can be directly charged into the electric furnace main body in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material charging device for adjusting emergency components in a closed electric furnace.

[0002]

2. Description of the Related Art FIG. 3 is a schematic view of a closed electric furnace for producing ferroalloys and the like. 1 is an electric furnace main body, 2 is a furnace lid, 3 is an electrode, 4 is a furnace bottle for temporarily storing the mixed raw material, 5 is a mixed raw material feeding pipe, 6 is a mixed raw material transport conveyor, 7 is a swivel conveyor, 8 is a mixed raw material It is a receiving shoe, and 20 indicates a blended raw material.

The raw materials to be supplied to the closed electric furnace are prepared by measuring a predetermined amount of various individual raw materials and mixing them. This mixed raw material is sent out by a mixed raw material transport conveyor 6, and is stored in a plurality of mixed raw material upper furnace bottles 4 by a swivel conveyor 7. As shown in FIG. 3, a choke feed method is generally used as a raw material charging method in a closed electric furnace, and therefore, a large number of preparation raw material furnace upper bins 4 are arranged on the electric furnace body 1. As an example of the arrangement radix, in the case of a 35000 KVA electric furnace, 15
There are examples where groups are provided. Also, the blending raw material furnace upper bottle 4
The amount of the blended raw material stored in the raw material supply system including is about half of the supply amount. Then, the prepared raw material 20 in the upper bin 4 of the prepared raw material is charged into the electric furnace main body 1 through the mixed raw material charging pipe 5 in order of the amount corresponding to the capacity reduced by tapping.

[0004]

Although it is often necessary to adjust the components during operation, if the above-mentioned raw material supply system is used as it is, this component adjustment requires a long time. That is, since the raw material supply system stores the raw material mixture for up to half a day of the supply amount, even if the raw material mixture having a new blending ratio is sent to the furnace bin 4 and the raw material mixture is sequentially replaced, the components are adjusted. It takes more than half a day to be done.

However, in the actual implementation of the component adjustment,
If such adjustment for a long time is not allowed, a mixed raw material having a new mixing ratio is separately prepared and conveyed onto the furnace lid 2, and this is manually fed from an inspection hole or the like provided in the furnace lid 2. Was thrown in. When such a means is adopted, a lot of labor is required, and the charging is not completed in a short time.

[0006] It is an object of the present invention to provide an apparatus for feeding a raw material for component adjustment, which enables rapid component adjustment without requiring human power.

[0007]

In order to achieve the above object, the present invention provides a component-adjusting raw material bottle, a component-adjusting raw material receiving shoe attached to an upper portion of the component-adjusting raw material bottle, and a component adjusting material. It consists of a component-adjusting raw material feeding pipe attached to the bottom of the raw material bottle. The ingredient adjusting raw material receiving shoe is connected to the blending raw material receiving shoe of the blending raw material furnace upper bin, and a switching damper is provided at the connection portion thereof to adjust the ingredients to the blending raw material receiving shoe and the ingredient adjusting shoe. It is configured to be divided into a raw material receiving shoe. Further, a damper is provided at the lower end of the component adjusting raw material bottle, and the lower part of the component adjusting raw material introducing pipe is connected to a component adjusting raw material introducing nozzle provided on the furnace lid. The component adjusting raw material charging nozzle provided in the furnace lid is provided within a circle where the mixed raw material charging pipe is arranged.

[0008]

The present invention is provided in the middle of the conventional raw material supply system, that is,
Since it is connected to the preparation raw material receiving shoe of the preparation raw material furnace upper bottle, the equipment before the preparation raw material receiving shoe can be used as it is. Therefore, the component-adjusting raw material to be temporarily charged is adjusted to a component-adjusting mixing ratio, and then sent to the component-adjusting raw material bottle via the mixed raw material transport conveyor and the swivel conveyor. Then, the component adjusting raw material is directly charged into the electric furnace main body from the component adjusting raw material bottle. Further, a component adjusting raw material charging nozzle of the furnace lid is provided on the arrangement circle of the blending raw material supplying pipe or preferably inside the arrangement circle so as to accelerate the dissolution of the introduced component adjusting raw material and to smoothly proceed the component adjustment. I have to.

[0009]

1 is a schematic view showing an embodiment of the present invention. In FIG. 1, the same components as those in FIG. 3 are assigned the same reference numerals and explanations thereof will be omitted. This embodiment is composed of a component-adjusting raw material bottle 10, a component-adjusting raw material receiving shoe 11 attached to the upper portion, and a component-adjusting raw material feeding pipe 12 attached to the lower portion. As a result, a component adjustment raw material supply system is newly formed.

The relationship between this component-adjusting raw material supply system and the mixed raw material supply system used in the steady state will be described. The ingredient-adjusting raw material receiving shoe 11 is connected to the blending raw-material receiving shoe 8 of the upper bottle 4 for the ingredient-mixing raw material, and the lower portion of the ingredient-adjusting ingredient input pipe 12 is the ingredient-adjusting ingredient provided in the furnace lid 2. It is connected to the charging nozzle 13. Therefore, the raw material supply system has one system up to the swivel conveyor 7, and has two systems thereafter. That is, the recipe for receiving the mixed raw materials
In addition to the blending raw material supply system that is used in a steady state, which includes the blending raw material upper furnace bin 4 and the blending raw material feeding pipe 5, a component adjusting raw material receiving shunt 11-a component adjusting raw material bottle 10-a component adjusting raw material feeding pipe 12 And a component-adjusting raw material supply system that is used as needed is provided.

A switching damper 14 is provided at the connecting portion between the compounding raw material receiving shoe 8 and the component adjusting raw material receiving shoe 11 in order to separate the component adjusting raw material receiving shoe 11 and the subsequent systems. The connection portion has a structure in which the raw material is distributed to either the blended raw material receiving shoe 8 side or the component adjusting raw material receiving shoe 11 side as necessary. The switching damper 14 is a fluid pressure driven type such as compressed air or an electric type, and is opened and closed by remote operation.

A damper 15 is provided at the lower end of the component adjusting raw material bottle 10 or in the vicinity thereof. This damper 1
Reference numeral 5 is closed when the component-adjusting raw material is stored, and is opened when it is charged. The damper 15 is also a fluid pressure drive type such as compressed air or an electric type, and is opened and closed by remote operation.

The lower portion of the component adjusting raw material feeding pipe 12 is connected to a component adjusting raw material feeding nozzle 13 provided in the furnace lid 2. The component adjusting raw material charging nozzle 13 is closed during steady operation, and is used only when the component adjusting raw material is charged. Therefore, the connection and disconnection of the component adjusting raw material feeding pipe 12 and the component adjusting raw material feeding nozzle 13 must be performed every time the component adjusting raw material is fed. As described above, since the component adjusting raw material feeding pipe 12 and the component adjusting raw material feeding nozzle 13 are not fixedly connected, it is preferable to connect the both by interposing the flexible tube 12a such as a flexible hose to facilitate the attachment / detachment.

Component adjusting raw material charging nozzle 13 provided on the furnace lid
Is provided on the arrangement circle of the preparation raw material input pipe 5 or at a position inside thereof, an example of which is shown in FIG. FIG. 2 is a schematic plan view showing an example of the arrangement of the component adjusting raw material charging nozzles in a 35,000 KVA closed electric furnace equipped with 15 bottles of the preparation raw material furnace. In FIG. 2, 1 is an electric furnace main body, 2 is a furnace lid, 3 is an electrode, 12 is a mixed raw material feeding pipe (shown by 15 white circles), and 13 is a component adjusting raw material feeding nozzle (shown by black circles). .. The component adjusting raw material charging nozzle 13 is provided on the arrangement circle P of the mixed raw material charging pipe 12.

Next, the operation for adjusting the components using the present invention will be described. As a preliminary preparation, a mixed raw material receiving shoe 8 and a component adjusting raw material receiving shoe 11
The switching damper 14 provided in the connection portion of (1) is driven to allow the component adjusting raw material to flow to the shoot 11 side. Make sure that the damper 15 under the ingredient adjusting raw material bottle 10 is closed. The component adjusting raw material feeding pipe 12 and the component adjusting raw material feeding nozzle 13 are connected via the flexible tube 12a.

Then, the composition of the ingredient-adjusted raw material is prepared by changing the setting of the predetermined measurement value of the individual raw material to change the blending ratio. The prepared ingredient adjusting raw material is sent by the compounding ingredient transporting conveyor 6, and is fed from the swiveling conveyor 7 to the ingredient adjusting ingredient receiving shoe 8 to which the ingredient adjusting ingredient accepting shoe 11 is connected. In this way, the component adjusting raw material 21 is stored in the component adjusting raw material bottle 10.

The damper 15 is opened, and the ingredient adjusting raw material 21 is charged into the electric furnace body 1. When the component adjusting raw material 21 is added as described above, the addition is completed in a very short time, and the components can be adjusted quickly. Further, since the ingredient adjusting raw material 21 is introduced into a position within the arrangement circle of the compounding ingredient introducing pipe 5, its dissolution is fast and the ingredient adjusting is further promoted.

After the addition of the ingredient adjusting raw material 21 is completed, the following measures are taken to return to the normal operation. The damper 15 is closed, the switching damper 14 is returned to the original state, the component adjusting raw material feeding pipe 12 and the component adjusting raw material feeding nozzle 13 are separated, and then the component adjusting raw material feeding nozzle 13 is closed.

In the above description, the use of the present invention is limited to the case where the components are adjusted, but the present invention is not limited to the use at the time of adjusting the components, and the production variety is changed. It can also be used as a means for switching.

[0020]

The present invention comprises a component-adjusting raw material bottle, a component-adjusting raw material receiving shoe attached to the upper portion thereof, and a component-adjusting raw material feeding pipe attached to the lower portion thereof. The component adjusting raw material receiving shoe is connected to the compounding raw material receiving shoe, and the component adjusting raw material feeding pipe is connected to the component adjusting raw material feeding nozzle provided on the furnace lid. It is a device that is branched off from and passes only the ingredient adjustment raw material.

When the present invention is used, the component adjusting raw material stored in the component adjusting raw material bottle can be directly charged into the electric furnace main body in a short time, and the component adjustment can be performed quickly.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 35000K with 15 bottles of blended raw material furnace
It is a schematic plan view which shows an example of a component adjustment raw material charging nozzle arrangement in the closed electric furnace of VA.

FIG. 3 is a schematic view of a closed electric furnace for producing ferroalloys and the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric furnace main body 2 Furnace lid 3 Electrode 4 Blending raw material bottle 5 Blending raw material input pipe 8 Blending raw material receiving shunt 10 Component adjusting raw material bin 11 Component adjusting raw material receiving shunt 12 Component adjusting raw material feeding pipe 13 Component adjusting raw material feeding nozzle 14 Switching Damper 15 Damper 20 Compounding Raw Material 21 Component Adjusting Raw Material

Claims (1)

[Claims] 1. A component-adjusting raw material bottle and a component-adjusting raw material receiving shoe attached to the upper part of the component-adjusting raw material bottle.
And a component adjusting raw material feeding pipe attached to the bottom of the component adjusting raw material bottle,
Is connected to the blended raw material receiving shoe of the blended raw material furnace upper bin, and a switching damper is provided at the connecting portion so that the raw material is distributed between the blended raw material receiving shot and the component adjusting raw material receiving shot. The component adjusting raw material bottle is equipped with a damper at the lower end thereof, and the lower portion of the component adjusting raw material feeding pipe is connected to the component adjusting raw material feeding nozzle provided on the furnace lid. A raw material charging device for adjusting the components of a closed electric furnace, which is provided within a circle where the tubes are arranged.