JPH0744958Y2 - Chute structure of pressure metallurgical furnace - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a chute structure of a pressure-type metallurgical furnace for performing a metallurgical reaction on scrap, iron ore and the like.

[Prior art]

A metallurgical furnace has been developed in which a furnace mouth head is joined to a furnace body in an airtight manner in order to put a pressure inside the furnace during operation.

In the furnace mouth head of the pressure type metallurgical furnace, scrap in the furnace,
In addition to connecting a charging chute for charging iron ore, auxiliary materials, etc. (hereinafter referred to as the furnace charge), an exhaust gas duct for guiding the exhaust gas generated in the furnace to the outside of the furnace, and a top blowing lance for blowing oxygen etc. To be done.

On the other hand, in many cases, the furnace body is separated from the furnace head for charging the raw materials and taking out the molten metal, and can be independently tilted.

[Problems to be solved by the device]

By the way, in the pressure type metallurgical furnace as described above, between the function of facilitating the tilting of the furnace body by separating the furnace body and the furnace mouth head for taking out the molten metal, and the equipment communicating with the furnace. Is required to have a function of being completely airtight in order to prevent gas leakage from the pressurized furnace.

Therefore, if a dedicated charging chute is connected to the furnace mouth head for each charging material in the furnace in order to load the charging material into the furnace, each charging chute slides with high airtightness. A mechanism is required, and this increase in the number of sliding mechanisms causes environmental deterioration due to a large amount of gas leakage, increases in the gas consumption rate, etc., and the complexity of maintenance and equipment for maintaining airtightness. Incurs higher design and manufacturing costs.

The present invention has been made in view of the above-mentioned points, and a sliding mechanism having a high airtightness is formed by integrating the charging chute bases connected to the furnace mouth head regardless of the number of charging objects in the furnace. One object is to provide a high-performance pressure-type metallurgical furnace chute structure with no gas leakage.

[Means for Solving the Problems]

In order to achieve the above object, the gist of the present invention is to connect a furnace mouth head to a furnace body opening, connect a charging chute to the furnace mouth head, and charge a furnace charge into the furnace. In a pressure-type metallurgical furnace that performs the charging chute through the charging chute, a chute connecting portion is provided in the furnace mouth head,
A chute structure of a pressure-type metallurgical furnace characterized in that a charging chute base part having a collective structure is connected to the chute connecting part via a sliding mechanism having high airtightness.

[Action]

In the above-mentioned configuration, during operation, various in-furnace charged materials are charged into the furnace from each charging port of the charging chute, and are charged through the chute connecting portion of the furnace port head.

Since a sliding mechanism with high airtightness is interposed between the chute connecting part of the furnace mouth head and the charging chute base, gas leakage from the pressurized furnace to the outside is completely prevented. It

The molten metal is taken out by uncoupling the furnace body and the furnace mouth head, raising the furnace mouth head above the furnace body and retracting it from the furnace body, and tilting the furnace body.

At this time, during the upward movement of the furnace mouth head, a sliding mechanism smoothly slides the fixed chute base portion and the chute connecting portion of the furnace mouth head.

〔Example〕

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

1 to 3 show an embodiment of the present invention, in which 1 is a furnace body, 2 is a furnace mouth head which is airtightly connected to an upper opening of the furnace body 1, and 3 is a furnace mouth head 2. With a cylindrical chute connecting portion provided in, the upper half is made vertical and the opening is directed upward. Reference numeral 4 denotes a charging chute connected to the chute connecting portion 3, and charging holes 4a to 4n are provided at predetermined positions so that the charging material in each furnace can be charged into each charging chute. 5 is inserted into the chute connecting portion 3, and a sliding mechanism 6 having high airtightness between the chute connecting portions 3 is provided.
The furnace opening head 2 can be moved up and down within a predetermined range with respect to the charging chute 4 which is fixed.

In the figure, 7 is an exhaust gas duct connected to the furnace head 2,
This is for guiding the exhaust gas from the inside of the furnace to the outside of the furnace. The exhaust gas duct 7 is additionally provided with a well-known expansion joint part or the like that allows the furnace head 2 to move up and down near the furnace head 2. Reference numeral 8 denotes an upper blowing lance that is inserted into the furnace by penetrating the furnace port head 2 and blowing oxygen or the like. The lance penetrating portion of the furnace port head 2 is provided with an airtight sliding mechanism having a known structure.

Further, although not shown in the drawings, there is a furnace body 1 having side walls and a bottom provided with tuyere for blowing gas for stirring.

In the present invention, various kinds of charging materials in the furnace are charged from the charging ports 4a to 4n of the charging chute 4, and a common chute provided in the furnace head 2 from the charging chute base 5 having a collective structure. It is performed via the connecting portion 3.

Therefore, from which position the charging material in each furnace is to be charged to the charging chute 4 (selection of the charging ports 4a to 4b), the mobility in the charging chute 4 is determined by the characteristics of the charging material in each furnace. It can be appropriately determined in consideration.

In the collective structure of the charging chute base 5 in FIG. 1, the charging chute 4 itself is composed of one tube body whose diameter gradually decreases from its base to its tip, and a required number of charging ports 4a to
4n is provided. Since the in-furnace inputs charged in the charging chute 4 have mutual interference in the chute, the respective in-reactor charges are assisted so as to mutually assist movement in the charging chute 4. The placement position is determined.

In the collective structure of the charging chute bases 5 in FIG. 2, the charging chute 4 is composed of an assembly of a plurality of independent pipes, and as the charging chute bases 5, the respective pipe bases are combined and the covering pipes 5a are attached. With the construction, each furnace charge is carried out through a dedicated pipe body, and there is no mutual interference of each furnace charge in the charging chute 4 part.

What is shown in FIG. 3 is an addition to the charging chute structure shown in FIG.
Corresponding to each tube constituting the charging chute 4, a relay tube body 9 is fixedly attached to the chute connecting portion 3, and an end portion of the corresponding charging chute 4 side tube body is fitted to an end portion of the relay tube body 9. With the inserted structure, the contents in each furnace are completely prevented from interfering with each other from the charging into the charging chute 4 to the inside of the furnace.

In the configuration shown in FIG. 3, it is necessary to specially provide an airtight mechanism or the like between the end portion of each relay tube body 9 and the corresponding injection chute 4 side tube body fitted therein. Instead, it may be a structure in which both are directly slid.

〔effect〕

As described above, according to the present invention, the charging chute base portion connected to the furnace mouth head has a collective structure, and only one sliding mechanism having high airtightness is required for connection to the furnace mouth head. By doing so, the following effects are achieved.

(A) The input chute structure is simplified, the equipment design,
Cost can be reduced from the manufacturing aspect.

(B) The environment can be improved by reducing the amount of gas leakage, and the dust collector and the like attached to the metallurgical furnace equipment can be downsized.

(C) By reducing the gas consumption rate, resources can be used effectively and costs can be reduced from the operational aspect.

(D) Efficient human resources are achieved by simplifying maintenance, and it is also effective in terms of reducing the amount of spare parts and simplifying management.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a pressure type metallurgical furnace showing a first embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a pressure type metallurgical furnace showing a second embodiment, and FIG. The figure is a schematic configuration diagram of a pressure-type metallurgical furnace showing a third embodiment. 1 ... Furnace body, 2 ... Furnace mouth head, 3 ... Chute connection part, 4 ... Charging chute, 5 ... Charging chute base, 6
...... Sliding mechanism, 7 ...... Exhaust gas duct, 8 ...... Top blowing lance, 9 ...... Relay tube.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshio Uchiyama 3-1, 1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Heavy Industries Ltd. Kobe factory (72) Kenichi Yajima Higashi-kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture 3-1-1 Kawasaki Heavy Industries, Ltd. Kobe Factory (72) Creator Satoshi Tatsuda 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture 3-1-1 Kawasaki Heavy Industries Ltd. Kobe Factory (72) Inventor Yukihiko Takaza Hyogo 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Kawasaki Heavy Industries, Ltd. Kobe factory (72) Inventor, Sumio Sato 3-1-1, Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture Kawasaki Heavy Industries, Ltd., Kobe factory

Claims (1)

[Scope of utility model registration request] 1. A pressurizing type in which a furnace opening head is connected to an opening of a furnace body, a charging chute is connected to the furnace opening head, and a charging material in the furnace is charged into the furnace through the charging chute. In a metallurgical furnace, a chute connecting portion is provided in a furnace mouth head, and a charging chute base portion having a collective structure is connected to the chute connecting portion through a sliding mechanism having high airtightness. Characteristic pressure metallurgical furnace chute structure.