JP3237044B2 - Casting removal device for flue of smelting furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mechanically removing casts adhering to an inner wall of a flue of a smelting furnace used for continuous smelting of copper.

[0002]

2. Description of the Related Art Conventionally, a smelting facility for continuously smelting copper as shown in FIG. 6 has been used. This smelting plant melts and oxidizes copper concentrate supplied together with oxygen-enriched air through a lance 7 inserted into the ceiling, and produces a Kawa M mainly containing a mixture of copper sulfide and iron sulfide, A smelting furnace 1 for producing gangue, a solvent, and kalami S composed of iron oxide and the like in a copper concentrate, and Kawa M and kalami S generated in the smelting furnace 1
And a copper making furnace 3 that further oxidizes the water M separated from the kalami S in the separation furnace 2 to produce crude copper C. And, between the smelting furnace 1 and the separation furnace 2, and between the separation furnace 2 and the copper making furnace 3, gutters 4.5 for transferring the molten metal are provided, respectively. It is designed to smelt copper continuously. In the smelting furnace 1, the flue gas containing sulfur generated by the reaction of a large amount of oxygen-enriched air supplied from the lance 7 with copper concentrate or the like is converted into a flue gas 10 shown in FIG.
Through the smelting furnace 1, the temperature is reduced by a waste heat boiler, and then transferred to a sulfuric acid factory.

[0003]

However, components such as copper sulfide, iron sulfide, and magnetite contained in the exhaust gas taken out of the smelting furnace 1 gradually adhere to the inner wall surface of the flue. So-called cast-in occurs. And this casting is remarkable on the horizontally extending wall surface 12 of the flue 10. Since this casting gradually grows and eventually blocks the flue 10, conventionally, an operator inserts a tool for removing casting from the opening 14 provided on the wall surface of the flue 10 to remove the casting. I have. However, since the exhaust gas flowing inside the flue 10 is at a high temperature, the physical burden on the worker performing the casting removal operation is great. In addition, when the smelting furnace is stopped to perform the casting removal operation, the operating rate of the smelting furnace decreases.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a casting method capable of mechanically removing casting on an inner wall surface of a flue. An object of the present invention is to provide a removing device.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide an apparatus for removing castings adhered to a horizontally extending wall inside a flue of a smelting furnace according to the present invention. Scraping means for moving and scraping the cast, first driving means for sliding the scraping means on the wall surface, and moving the scraping means through an opening provided in a side wall of the flue. A second driving unit that reciprocates integrally with the first driving unit between a position where the vehicle can enter the flue and slides on the wall surface and a position that is taken out of the flue, The first driving means includes a hydraulic breaker for quickly reciprocating a piston at a predetermined stroke, the second driving means includes a hydraulic cylinder for displacing the scraping means together with the first driving means, and the scraping means includes a claw body. Is pressed against the horizontal wall of the flue by its weight A lock one to the block
One end is fixed and the piston is attached to the other end.
A pipe adapted to collide with the first drive means, and the impact force of the piston of the hydraulic breaker of the first drive means is transmitted to the block of the scraping means via the pipe. Can be achieved by the cast removal device. Further, the scraping means includes a pipe.
Having a substantially rectangular parallelepiped shape inside thereof.
An outer surface of the lock is extended in the axial direction, and a cylindrical cover having a rectangular cross section having an end fixed to the block is provided.
When the scraping means slides on the wall surface, the cover opens a small gap with respect to the periphery of the rectangular opening of the flue, and the scraping means Preferably, it is inserted. Further, it is preferable that the scraping means is provided with a pressurized air blowing means for blowing pressurized air toward the wall surface. In addition, it is preferable that a nail body for scraping the cast-in is detachably screwed to the scraping means.

[0006]

The second driving means integrally moves the scraping means and the first driving means to move the scraping means into the flue through an opening provided on the side wall of the flue, and to move the scraping means on the horizontal wall. And the unit is moved back together to position the scraping means outside the flue. The scraping means positioned on the wall surface is slid on the wall surface by the first drive means to scrape the sticking on the wall surface. Also, when the scraping means slides on the wall surface, the scraping means forms an outer surface facing the periphery of the opening of the flue with a slight gap formed therebetween, thereby flowing inside the flue. The amount of the exhaust gas leaking out of the gap between the scraping means and the periphery of the opening can be reduced. Furthermore, by blowing out high-pressure air from the scraping means toward the wall surface, it is possible to easily blow off the castings scraped off by the scraping means and remove it from the wall surface. In addition, the worn claw member can be easily replaced with a new one by detachably attaching the claw member for scraping the cast-in to the scraping means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 1 A caster removing device for a flue of a smelting furnace according to the present invention.
Embodiments will be described below in detail with reference to the drawings. Here, FIG. 1 is a side view of one embodiment of the cast remover according to the present invention, FIG. 2 is a plan view of a main part of the cast remover shown in FIG. 1, and FIG. 3 is an enlarged view of a scraping means. 4 is a cross-sectional view of the scraping means shown in FIG.
FIG. 5 is an arrow view of the tip portion of the scraping means shown in FIG.

As shown in FIG. 1, an apparatus 100 for removing a cast from a flue of a smelting furnace according to the present embodiment includes a horizontal wall 1 in a flue 10.
A scraping means 20 that slides on 2 to scrape the cast;
First driving means 30 for reciprocating the scraping means 20 in the axial direction so as to slide on the horizontal wall surface 12;
The scraping means 20 is inserted into the flue 10 through an opening 14 provided in the side wall of the flue 10 to
A second drive means for reciprocating integrally with the first drive means between a position where the first drive means can be slid on the stack and a position taken out of the flue; The smelting furnace flue casting removal apparatus 100 of the present embodiment is shown in FIG.
Are arranged symmetrically with respect to the center line L in the width direction of the flue 10 shown in FIG. 1, but since the structures are completely the same, the apparatus on the right side in the drawing will be described below.

The flue 10 has a side sectional shape as shown in FIG.
Numeral 0 is for removing the sticking on the inner wall surface 12 of the horizontal wall 11. As shown in FIGS. 1, 2 and 7, a rectangular opening 14 for allowing the scraping means 20 to protrude and retract into the flue 10 is formed through the vertical wall 13 of the flue 10. I have. On the outer surface of the vertical wall 13, there is provided a door 17 which is guided by a vertically extending guide member 15 and is suspended by a wire cable 16 so as to be able to move up and down.
The opening 14 can be opened by lifting the 7.

As shown in FIG. 3 in an enlarged manner, the scraping means 20 includes a nail body 21 having a sharpened claw 21a that is in close contact with the horizontal wall surface 12 and scrapes off the cast. A substantially rectangular parallelepiped block 22 which is screwed and disposed at a predetermined distance from the horizontal wall surface 12 and presses the claw body 21 against the horizontal wall surface 12 by its weight; And a cover 23 extending in the axial direction on the outer peripheral surface of the cover.

As shown in the sectional view of FIG. 4, the cover 23 has a pair of upper and lower horizontal plates 23a
23b and a pair of left and right side plates 23c and 23d are combined into a tubular shape having a rectangular cross section, one end of which is fixed to the block 22 and the other end of which is the first The flange 24 through which the piston 32 of the driving means 30 slidably penetrates is attached.
In addition, three partition plates 2 which are interposed in the cover 23 and extend perpendicularly to the axial direction increasing the strength thereof.
6, circular holes 26a are respectively provided so as to be coaxial with each other, and a pipe 29 is inserted through these circular holes 26a. One end of the pipe 29 is fixed to the block 22, and the other end of the pipe 29 is caused to collide with the piston 32 of the first driving means 30, and thus the first driving means 30 The impact force generated by the reciprocation of the piston 32 is transmitted to the block 22 through the pipe 29.

The outer surface of the cover 23 is opposed to the periphery of the opening 14 of the flue 10 with a sufficiently small gap when the scraping means 20 slides on the wall surface 12. It extends in the axial direction. As a result, compared with the case where the claw body 21 and the first driving means 30 are connected by, for example, an elongated rod or the like, the exhaust gas flowing inside the flue 10 is scraped off by the scraping means 20 and the periphery of the opening 14. And the amount of leakage from the gap to the outside can be greatly reduced. Therefore, it is not necessary to set the opening 14 small in order to reduce the leakage of the exhaust gas to the outside. Therefore, by increasing the area of the opening 14, the exhaust gas is inserted into the flue 10 through the opening 14. The size of the scraping means 20 can be increased, so that casting on the horizontal wall surface 12 can be efficiently removed.

Further, as shown in FIG.
A steel material 23e having a U-shaped cross section is fixed to the lower surface of 3 to form a sealed space 23f having a rectangular cross section extending in the axial direction. As shown in FIG. 3, one end of an S-shaped pipe 28 in a side view attached to the inside of the cover 23 is inserted into the sealed space 23f, and the other end is formed. Flange 27 provided on
The pressurized air supplied from a pressurized air supply source (not shown) connected to the
3f.

As shown in FIG. 3, the claw main body 21 is screwed to the block 22 with bolts 25 so as to be detachable, so that when the claw 21a is worn by scraping off the casting, It can be easily replaced with a new nail body 21. Block 2
2 has a substantially rectangular parallelepiped shape, and its upper surface and both left and right sides are made flush with the outer surface of the cover 23. As shown in FIG. 5, a substantially T-shaped groove 22a is formed in the lower surface of the block 22. A thick plate 22b formed in the same plane shape as the groove 22a having three notches 22c in the opening of the groove 22a.
Are press-fitted, thereby forming a T-shaped sealed space 22d. And this T-shaped sealed space 2
An end of 2d on the opposite side to the notch 22c communicates with the sealed space 23f provided below the cover 23. Therefore, the cover 2
As shown in FIG. 5, the pressurized air supplied through the S-shaped pipe 28 provided in the nozzle 3 moves in the sealed space 23f in the direction of arrow F and flows into the T-shaped sealed space 22d. Then, it further proceeds in the direction of arrow G and blows out in the direction of arrow H from the notch 22c. As a result, the cast portion that the claw 21a scrapes off from the horizontal wall surface 12 is blown off by the flow of pressurized air that blows out from the notch 22c toward the claw 21a, and is easily removed from the horizontal wall surface 12. Have been able to.

The first driving means 30 includes a hydraulic breaker 31 and a carriage 34 on which the hydraulic breaker 31 is mounted.
A frame 35 integrally connected to the bogie 34 and extending downward, and a hydraulic pressure curving in a U-shape in a side view that has one end connected to the frame 35 and supplies hydraulic oil to the hydraulic breaker 31. A pipe 36 is provided. When pressure oil is supplied through the hydraulic pipe 36, the hydraulic breaker 31 causes the piston 32 to reciprocate quickly in the axial direction at a predetermined stroke by the action of a valve (not shown). Then, the piston 32 strikes the pipe 29 provided in the cover 23 of the scraping means 20 as described above, applies a striking force to the claw body 21 in the direction of arrow B, and slides the same. Flue 10
Of the nail body 2 that is firmly attached to the horizontal wall 12 of the
1 for scraping and removing. Also,
The carriage 34 is guided by a pair of parallel guide rails 51 supported by a frame 50 and extending in the horizontal direction, and can reciprocate as shown by an arrow A in FIG.

In the present embodiment, the second drive means 40 is a hydraulic cylinder 41 supported below the guide rail 51 and extending horizontally as shown in FIG. Then, pressure oil is supplied to the hydraulic cylinder 41 so that the piston 4 whose tip is connected to the frame 35
When the cart 2 is extended, the carriage 34 is displaced to the right in the drawing, whereby the scraping means 20 is displaced in the axial direction together with the first drive means 30 and positioned outside the flue 10. . Conversely, when the piston 42 is shortened, the carriage 34 is displaced leftward in the drawing, and the scraping means 20 is positioned inside the flue 10. Also, by adjusting the amount of pressure oil supplied to the hydraulic cylinder 41 and changing the displacement of the piston 42, the position of the scraping means 20 on the horizontal wall surface 12 can be determined. I have.

Next, the operation of the cast removal apparatus 100 of this embodiment will be described. In order to start the operation of removing the sticking attached to the horizontal wall surface 12 of the flue 10, first, a door 17 closing the opening 14 of the flue 10 is lifted by winding up a wire cable 16, and the opening 14 is lifted. To release. Next, pressure oil is supplied to the hydraulic cylinder 41 of the second driving means 40 to shorten the piston 42, and the scraping means 20 and the first driving means 30 are integrated together as shown in FIG. And the scraping means 20 is inserted through the opening 14 into the flue 14. At this time, the claw 21 of the scraping means 20 is positioned at the center in the width direction of the horizontal wall surface 12 by maximizing the displacement, and conversely, the claw 21 is minimized by minimizing the displacement. It can be located at the end of the wall surface 12 on the opening 14 side. Regardless of the position of the claw 21 in the flue 10, the gap between the outer surface of the cover 23 and the periphery of the opening 14 is sufficiently narrowed as shown in FIG. The amount of exhaust gas that leaks out of the opening 14 to the outside can be minimized. Further, since the first driving means 30 is located outside the flue 10, the influence of the heat of the exhaust gas flowing in the flue 10 can be avoided.

After positioning the claws 21, the scraping means 2
When the pressurized air is supplied through an S-shaped pipe 28 provided in the cover 23 of the cover 0, the supplied pressurized air flows through the sealed spaces 23f and 22d as shown by arrows F and G in FIG. It flows and blows out toward the claw 21 from the notch 22c. In this state, when pressure oil is supplied to the hydraulic breaker 31 of the first driving means 30 and the piston 32 strikes the pipe 29 of the scraping means 20, the striking force generated by the hydraulic breaker 31 is increased by the pipe 29 and the block 2.
2, the nail 21 scrapes off the sticking on the horizontal wall surface 12. The scraped cast is blown off by the pressurized air blown out toward the claws 21, and is quickly removed from the horizontal wall surface 12. Then, the pressurized oil is supplied to the hydraulic cylinder 41 of the second drive means 40, and the casting on the horizontal wall 12 is removed by performing the casting removal operation while appropriately changing the position of the claw 21 on the horizontal wall 12. It can be completely removed. After the casting removal operation is completed, pressure oil is supplied to the hydraulic cylinder 41 of the second drive means 40 to extend the piston 42 to the full, so that the scraping means 20 is positioned outside the flue 10. At the same time, the door 17 is lowered to close the opening 14 of the flue 10.

That is, the cast removal apparatus 10 of this embodiment is
According to 0, it is possible to mechanically remove the sticking on the wall surface 12 extending horizontally in the flue 10. Also,
In the present embodiment, since the first driving device 30 is provided with the hydraulic breaker 31 to apply a striking force to the claw 21 of the scraping means 20, the cast sticking firmly adhered on the wall surface 12 is efficiently removed. be able to. Further, since the pawl 21 of the scraping means 20 is urged by the weight of the block 22 and pressed against the horizontal wall surface 12, the pawl 21 can be sufficiently digged into the casting, and the casting can be performed. Not only can the efficiency of the removal work be increased,
The mechanism for urging the claw 21 can be made very simple. In the present embodiment, a pair of left and right cast removal devices is used. However, when the area of the horizontal wall surface 12 is large, the number of the cast removal devices may be increased, or the cast removal device may rotate around a vertical axis. It is possible to respond by making it possible.

[0020]

As described above, the apparatus for removing casts from the flue of a smelting furnace according to the present invention has the following excellent effects. That is, according to the apparatus for removing casts from a flue of a smelting furnace of the present invention, casts can be removed mechanically, so that the physical burden on the operator can be reduced. In addition, since the casting removal operation can be performed while operating the smelting furnace, there is no need to stop the smelting furnace, and the operating rate of the smelting furnace can be improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of one embodiment of a cast removal apparatus according to the present invention.

FIG. 2 is an overall plan view of the cast removal apparatus shown in FIG.

FIG. 3 is an enlarged side view showing a scraping means.

4 is a cross-sectional view of the scraping means shown in FIG. 3, taken along the line CC.

FIG. 5 is an arrow view of a tip portion of the scraping means shown in FIG.

FIG. 6 is a side sectional view schematically showing a continuous smelting apparatus for copper.

FIG. 7 is a sectional view of a smelting furnace and its flue.

[Explanation of symbols]

 C Bronze M Kawa S Karami L Flue center line 1 Smelting furnace 2 Separation furnace 3 Copper making furnace 4 Melt transfer gutter 5 Melt transfer gutter 6 Molten transfer gutter 7 Lance 10 Flue 11 Horizontal wall 12 Wall surface 13 Vertical Wall 14 Opening 15 Guide member 16 Wire cable 17 Door 20 Scraping means 21 Claw body 22 Block 23 Cover 24 Coupling flange 25 Bolt 26 Partition plate 27 Flange 28 S-shaped pipe 29 Gas release pipe 30 First drive means 31 Hydraulic breaker 32 Piston 33 Flange 34 Bogie 35 Frame 36 Hydraulic piping 40 Second drive means 41 Hydraulic cylinder 42 Piston 50 Frame 51 Guide rail 100 Cast removal device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F27B 3/10 C22B 1/00-61/00 F27D 1/16

Claims (4)

(57) [Claims] 1. A device for removing sticking on a horizontally extending wall inside a flue of a smelting furnace, comprising: a scraping means for sliding on said wall to scrape said sticking. First driving means for sliding the scraping means on the wall surface, and sliding on the wall surface by allowing the scraping means to enter the flue from an opening provided in a side wall of the flue. A second drive unit for reciprocating the piston integrally with the first drive unit between a proper position and a position taken out of the flue. The first drive unit quickly reciprocates the piston at a predetermined stroke. A hydraulic cylinder for displacing the scraping means together with the first driving means, wherein the scraping means presses the pawl body by its weight against the horizontal wall of the flue. wherein the blanking
One end is fixed to the lock and the other end is
A pipe in which the piston is caused to collide, wherein the impact force of the piston of the hydraulic breaker of the first drive means is transmitted to the block of the scraping means via the pipe. Flue cast remover. Wherein said scraping means, internal to the pipe
And the block having a substantially rectangular parallelepiped shape.
An outer surface extending in the axial direction, comprising a cylindrical cover having a rectangular cross-section having an end fixed to the block, and when the scraping means slides on the wall surface, the cover is 2. The smelting furnace smoke according to claim 1, wherein the scraping means is inserted into the flue opening so as to leave a slight gap with respect to the periphery of the rectangular opening of the flue. Road cast removal equipment. 3. The flue of a smelting furnace according to claim 1, wherein said scraping means comprises a pressurized air blowing means for blowing pressurized air toward said wall surface. Casting removal device. 4. The smelting furnace according to claim 1, wherein the claw body for scraping off the sticking according to claim 1 is detachably screwed to the scraping means. Flue cast remover.