JPH0548068Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The invention relates to a shaft furnace for charging raw materials such as cathodes from the top and continuously melting and recovering them. The present invention relates to a shaft furnace that can extend the life of a protector provided in the furnace near the charging port.

"Prior Art" As a conventional shaft furnace of this type, a copper melting furnace as shown in FIG. 3 is known.

Reference numeral 1 in the figure is a furnace body placed on the top of a base 2. The furnace body 1 has a cylindrical shell 3 on the outside, and refractory bricks 4 are arranged inside this shell 3 without any gaps. A charging port 6 for raw materials 5 such as cathodes is formed in the upper part of the furnace body 1, and a Tatsupro 7 is provided at the bottom for recovering the copper melted within the furnace body. , furnace body 1
The raw material 5 fed through the charging port 6 is continuously melted in the furnace body 1 by injecting and burning fuel such as butane from burners 8 arranged in multiple stages spaced apart in the circumferential direction on the lower side surface of the furnace. Tap mouth 7
It is designed to recover molten copper from

A protective portion 1a is provided on the upper part of the furnace body 1, and a plurality of protectors 9 made of copper blocks having a predetermined shape are attached to the entire inner peripheral surface of the shell 3. This prevents the raw material 5 charged from the charging port 6 from hitting the inner surface of the furnace body 1 and damaging the inner wall of the furnace body 1. Furthermore, a roof 10 is attached to the upper part of the furnace body 1, and an opening is formed on one side of the roof 10 to serve as a charging port 6 for raw materials.
has been installed and is becoming a reality.

``Problems that the invention attempts to solve'' However, in the case of the conventional shaft furnace,
The raw material 6 introduced from the charging port 6 first passes through the protection section 1.
After hitting the protector 9 disposed in the portion facing the charging port 6 of a, it falls into the furnace, and the protector 9 in the portion facing the front of the charging port 6 becomes seriously damaged. Therefore, even though the copper protector 9 other than the front part was not so damaged, during the regular inspection carried out once a year,
All of the protectors 9 disposed on the protective portion 1a are replaced, which poses a problem in that the repair period becomes long and the repair cost becomes expensive.

The present invention was developed in view of the above-mentioned problems, and it is not necessary to completely replace the protector of the protective part at every regular inspection carried out every year, and it is possible to shorten the repair period at the time of inspection. The purpose of this project is to provide a shaft furnace that can extend the life of the shaft furnace and significantly reduce repair costs.

"Means for Solving the Problem" In order to solve the above-mentioned problem, the present invention provides protection by disposing a protector divided into a plurality of parts over the entire inner peripheral surface of the shell on the upper part of the furnace body. A section is provided so that the protective section can be separated upwardly from the furnace main body, and a jack is provided between the protective section and the furnace main body to drive the protective section in the vertical direction, and the jack is attached to the outer periphery of the furnace main body. It is provided with a rotation means for rotating along the circumferential direction.

"Function" According to the shaft furnace of the present invention, the raw material charged from the charging port mainly hits the protector in the part facing the front of the charging port and falls into the furnace body. , the damage to the protector in that area will increase, but if the damage becomes large,
After the protective part is lifted upwards from the furnace body by the jack and separated, it is rotated until the part of the protector with less damage is located in front of the charging port, and the jack is retracted to move the protective part to the furnace main body. Make it connect.

"Example" Hereinafter, the present invention will be explained using the drawings. 1st
Figure 2 shows the main part of an embodiment of the present invention,
This is an enlarged cross-section of the vicinity of the upper part of the copper melting furnace shown in the prior art. In these figures, the same elements as those shown in the prior art are given the same reference numerals and their explanations will be omitted.

Inside the cylindrical shell 3 of the furnace body 1, from the inside, there are refractory bricks 4a, heat-resistant bricks 4b, and heat insulating material 4.
c are arranged without any gaps to protect the shell 3 from the heat that melts the raw material 5 such as the cathode. A protective portion 1a is provided at the top of the furnace body 1 to prevent the heat-resistant bricks 4a and the like from being damaged by the raw materials 5 such as cathodes that are introduced into the furnace.

The protective part 1a is provided with a protector 9 made of a plurality of copper blocks each having a rectangular surface over the entire inner peripheral surface of a cylindrical shell 3a formed in the same shape as the shell 3 of the furnace body 1. It is something. In this embodiment, as shown in FIG. 2, the protector 9 is divided into 13 pieces and arranged along the inner peripheral surface of the shell 3a, and the lower end touches the upper end of the heat-resistant brick 4a, and the upper end It is arranged so as to reach near the upper part of the shell 3a, and further, between the inner circumferential surface of the shell 3 and the back of the protector 9, the front side of the protector 9 is arranged so as to match the inner circumferential surface of the heat-resistant brick 4. A bracket 12 made of H-beam steel is installed for placement. Two bolt holes 9a are formed in each of the upper and lower parts of the protector 9, and bolts 13 are inserted into the bolt holes 9a from the inside of the protector 9. The bolt 13 inserted into the protector 9 is projected to the outside of the shell 3 via a guide portion 14 inserted between the protector 9 and the shell 3, and is further provided with a bolt seat 15 provided on the outside of the shell 3. The tip protrudes through the. Then, the bolt 1 protruding from the bolt seat 15
A double nut 16 is screwed onto the tip of the shell 3 to fix the protector 9 at a predetermined position on the shell 3. Also, Ciel 3
A cooling main pipe 17 for sending cooling air into the protection part 1a is arranged on the outer peripheral surface of the cooling main pipe 1.
A plurality of cooling branch pipes 17a are arranged between the shell 7 and the shell 3 for supplying cooling air between the inner peripheral surface of the shell 3 and the back side of the protector 9 to cool the protection part 1a. ing.

A flange 18 is provided at the lower end of the protective portion 1a.
A flange 19 is provided at the upper end of the shell 3.
The protection part 1a is placed on the upper part of the furnace body 1 and is fixed to the upper part of the furnace body 1 by tightening the flanges 18 and 19 with bolts and nuts (not shown). ing. Also,
A ring-shaped support member 20 is fixed to the outer peripheral surface of the shell 3, and on the upper surface of this support member 20, rotating means, that is, four carts 21 that can run on the support member 20 are arranged at 90 degrees apart in the circumferential direction. The carriage 21 is provided with a jack 2 that is vertically expandable and retractable on the top of the truck 21.
2 is fixed. Further, near the lower end of the protective portion 1a, a bracket 23, on which the upper end of the jack 22 comes into contact, is fixed at a distance of 90° in the circumferential direction.

On the other hand, a flange 24 is provided at the upper end of the protective part 1a, a spacer 25 having flanges 25a, 25a at both ends is fixed to this flange 24, and a roof 10 is fixed to the upper part of the spacer 25, Furthermore, an opening is formed in one side of the roof 10, thereby serving as a charging port 6 for raw materials.

Next, the operation of the shaft furnace of the present invention constructed as described above will be explained.

In the shaft furnace assembled as shown in FIG. 1, the raw material 5 charged from the charging port 6 hits the protector 9 at the portion facing the charging port 6 and falls into the furnace body 1. It is dissolved therein and flows out from the tap opening 7. Therefore, when charging the raw material 5, the raw material 5 does not directly collide with the heat-resistant bricks 4a in the furnace body 1, and the heat-resistant bricks 4a are not damaged. In this embodiment, four copper blocks 9 disposed within a range of about 120 degrees in the circumferential direction are damaged more than other parts.

Therefore, during the annual periodic inspection,
First, the spacer 2 disposed on the upper part of the protection part 1a
5 is removed to form a space above,
The bolts are removed from between the flanges 18 and 19 to separate the furnace body 1 and the protection part 1a. Next, by extending the jack 22, the protective portion 1a
After rotating the jack 22 by 120° in the circumferential direction while slightly lifting the jack 22, the jack 22 is retracted, and the protective part 1a is placed on the top of the furnace body 1 again.
The flanges 18 and 19 are fixed with bolts and nuts (not shown). When the protective part 1a is fixed on the furnace body 1, a spacer 25 is inserted and fixed between the protective part 1a and the roof 10, and the roof 10 is attached to the upper part of the protective part 1a. Therefore, the four copper blocks 9, which were severely damaged, were moved 120 degrees from the front of the charging port 6 and were located in a part where the raw material does not come into direct contact with the raw material during charging, and were located in front of the charging port 6. A portion of the protector 9 that is not so damaged will be located. Therefore, protector 9
There is no need to completely replace the protector 9, and it is only necessary to lift and rotate the protector 1a, so the position of the protector 9 can be changed in a short time.

In this embodiment, during the next periodic inspection, the position of the protector 9 is further rotated by 120 degrees in the same manner as described above, and the less damaged portion of the protector 9 is positioned in front of the charging port. It can be used without replacing the protector 9.

In this way, in the shaft furnace of this embodiment, the protective part 1a with the protector 9 disposed on the upper part of the furnace main body 1 is provided, and the protective part 1a can be separated upward from the furnace main body 1. A jack is provided to drive the portion 1a in the vertical direction, and the jack is fixed to the top of a cart that rotates the top of a support member provided on the outer periphery of the furnace body, thereby preventing damage to the portion of the protector 9 facing the charging port. If the damage becomes large, use a jack to lift the protective part 1a upward from the furnace body 1 and separate it, and then rotate the protector 9 in the less damaged part until it is located in front of the charging port 6. Therefore, it is no longer necessary to replace the entire protector 9 at the time of periodic inspection carried out once a year, and the repair period can be shortened, as well as the repair cost can be significantly reduced.

Note that other embodiments and technical matters other than those described above will be described below.

() In the above examples, the shaft furnace of the present invention was used as a copper melting furnace, but it is not limited to this, and it can be used for any purpose as long as it has a refractory brick inside. You can.

() In the above embodiment, the copper block used for the protector 9 was divided into 13 pieces in the circumferential direction, but the shape is not limited to this, and the shape of the protector 9 can be changed depending on the size of the furnace, the method of use, etc. Of course, the number of sheets can be changed as appropriate.

() In the above embodiment, the position of the protector 9 was changed at every periodic inspection, but
Without being limited to this, if the protector 9 is severely damaged, it is possible to change the position of the protector 9, and by appropriately setting the bolt holes for fixing the flanges 18 and 19, The position of the protector can be rotated at any angle.

() In the above embodiment, a trolley that runs on the top of the support member is used as the rotating means, but the invention is not limited to this. For example, a rail may be provided on the top of the support member, and wheels may be attached to the bottom of the jack. Any structure may be used as long as the upper part of the support member can be rotated in the circumferential direction, such as by allowing the jack to run on a rail.

``Effect of the invention'' As mentioned above, in the shaft furnace of the invention, a protective part consisting of a protector divided into a plurality of pieces is provided on the upper part of the furnace main body, and the protective part is extended upward from the furnace main body. In addition to being separable, the furnace body is provided with a jack for driving the protective portion in the vertical direction, and further provided with a rotating means for rotating the jack in the circumferential direction along the outer periphery of the furnace body. If the part of the protector facing the charging port is damaged by the raw material being charged from the charging port, use jacks to lift the protective part upwards from the furnace body and separate it, then replace the protector with the less damaged part. By rotating the protector until it is located in front of the charging port, there is no need to completely replace the protector at every annual periodic inspection, which shortens the repair period at the time of inspection, and allows the protector to be completely replaced. This has the effect of extending service life and significantly reducing repair costs.

[Brief explanation of the drawing]

Figures 1 and 2 show the main parts of an embodiment of the shaft furnace of the present invention. Figure 1 is a side cross-sectional view of the vicinity of the protective part of the shaft furnace, and Figure 2 is a cross-sectional view of the protective part. FIG. 3 shows a conventional technique, and is a side sectional view showing the entire shaft furnace. DESCRIPTION OF SYMBOLS 1...Furnace body, 1a...Protection part, 3...Shell, 4, 4a...Refractory brick (4b...Heat resistant brick), 5...Raw material, 6...Charging port, 9...Protector (copper block) ), 21...rotating means (cart), 22... jack.

Claims (1)

[Scope of Claim for Utility Model Registration] A charging port is provided at the top of the furnace body, which is made of a cylindrical shell with refractory bricks arranged inside, and raw materials are fed through this charging port to continuously melt the raw materials. In the shaft furnace, a protective part is provided in the upper part of the furnace body, and the protective part is formed by disposing a protector divided into a plurality of parts over the entire inner peripheral surface of the shell, and the protective part can be separated upward from the furnace main body. At the same time, a jack is provided between the protection part and the furnace body, the tip of which is connected to the protection part to drive the protection part in the vertical direction, and the furnace body is provided with a rotating means connected to the base end of the jack. 1. A shaft furnace, wherein the jack is provided with a protective portion and thereby rotates the jack in the circumferential direction along the outer periphery of the furnace body at a position where the jack raises the protective portion.