JP2016164466A - Insertion lid for concentrate burner inspection hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress occurrence of turbulence in an inspection hole, and prolong a service life of a liner.SOLUTION: An insertion lid 1 for a concentrate burner inspection hole is inserted into an inspection hole 26 formed in a concentrate burner 10 to close the inspection hole 26. The insertion lid includes: a lid part 2 formed depending on the shape of the inspection hole 26, and closing an internal side opening part 26a on the internal side of the inspection hole 26; a main shaft 3 attached to the lid part 2; and a flange part 4 attached to the main shaft 3 so as to separate from the lid part 2, and closing an external side opening part 26b on the external side of the inspection hole 26.SELECTED DRAWING: Figure 1

Description

  The present invention is a concentrate burner provided in a self-melting smelting furnace and the like for feeding a smelting raw material and a reaction gas into the furnace, and is inserted into an inspection hole for confirming the inside of the concentrate burner. The present invention relates to an insertion cover for a concentrate burner inspection hole that closes the inspection hole. More specifically, the present invention relates to an insert cover for a concentrate burner inspection hole that can suppress wear of a peripheral liner provided with the inspection hole of the concentrate burner.

  One smelting furnace that uses sulfide concentrate as a raw material is a self-smelting furnace generally called a self-smelting furnace. As shown in FIG. 5, the self-melting smelting furnace 100 basically includes a reaction tower 11 having a concentrate burner 10 provided at the top 11 a and one end connected to the lower part of the reaction tower 11. And a flare vent 15 connected to the other end of the settler 14.

  Conventionally, in the auto-smelting furnace 100, a smelting raw material such as a powdered solid sulfide is provided with a reaction gas such as oxygen-enriched air for reaction, and a concentrate burner provided at the top 11a of the reaction tower 11. 10 is blown into the reaction tower 11. In the reaction tower 11, the blown smelting raw material is heated by the heat of the auxiliary fuel or the sensible heat of the reaction gas, the radiant heat in the furnace wall, etc., and instantaneously reacts with the reaction gas to the settler 14. Can be stored. Within the settler 14, the melt is divided into calami and river by the specific gravity difference. Then, the calami is discharged from the calami vent 12 and introduced into the electric smelting furnace 16. On the other hand, the river is extracted from the river outlet 13 in response to a request in a batch process of a converter (not shown) as the next step.

  Further, the high-temperature exhaust gas generated in the reaction tower 11 is discharged through the settler 14 and the flue path 15 and cooled by the boiler 17. The calami that has entered the electric smelting furnace 16 is heated and maintained by the electric heat energized by the electrode 18, and the hangers suspended in the calami are further settled on the bottom of the furnace, and only the calami that contains a slight amount of copper is removed. It is discharged out of the furnace through the port 19. In this way, the smelting raw material is divided into Karami and Kawa.

  As shown in FIG. 6, the concentrate burner 10 includes, for example, a concentrate chute 21, a reaction gas feed pipe 22, a burner cone 23, and a fixed or movable wind speed regulator 24. Yes. The concentrate chute 21 is a tubular member for feeding the smelting raw material into the reaction tower 11 and extends in the vertical direction toward the reaction tower 11 (see FIG. 5). The reaction gas feed pipe 22 is a tubular structure provided in a state of enclosing (including) the concentrate chute 21 and is formed so that the diameter decreases as it goes downward from a predetermined position in the pipe. A reaction gas is introduced into the reaction tower 11. The burner cone 23 is formed in a tubular shape, and its upper end 23 a is connected to the lower end 22 a of the reaction gas feed pipe 22, and feeds the smelting raw material and the reaction gas into the reaction tower 11. Yes. The wind speed regulator 24 is formed in a shape that narrows the width of the reaction gas flow path formed by the reaction gas feed pipe 22 and the concentrate chute 21 to a predetermined size. The speed of the reaction gas flow can be determined. Further, an auxiliary fuel burner 25 for feeding auxiliary fuel for raising the temperature of the reaction gas sent through the reaction gas feed pipe 22 extends toward the reaction tower 11 at the center of the concentrate chute 21. Yes. Further, the reaction gas feed pipe 22 and the burner cone 23 serve as inner walls of these, the wear-resistant liner 30 sprayed with the wear-resistant material, and the water-cooled jacket 31 disposed outside the wear-resistant liner 30 to cool the wear-resistant liner 30. It consists of and.

  Further, as shown in FIG. 6, on the side surface of the burner cone 23, the state inside the concentrate burner 10 is confirmed, or deposits such as the tip of the concentrate burner 10 and the auxiliary fuel burner 25 are removed. An inspection hole 26 is provided. The inspection hole 26 is a through hole that penetrates the inside and outside of the burner cone 23. The inspection hole 26 is formed, for example, in a rectangular shape in cross section, and is opened so as to penetrate the wear-resistant liner 30 and the water cooling jacket 31. Furthermore, the inspection hole 26 is formed so as to be inclined upward as it goes from the inner side (the wear-resistant liner 30 side) of the concentrate burner 10 to the outer side (the water cooling jacket 31).

  Moreover, as shown in FIG. 6, the inspection hole 26 has a rectangular plate shape only in the outer opening 26b of the inner opening 26a on the inner side of the concentrate burner 10 and the outer opening 26b on the outer side. It is blocked by the lid 27. Specifically, the outer side of the concentrate burner 10 in the inspection hole 26 is constituted by a cylindrical member 28 integrally formed on the side surface of the burner cone 23, and the lid 27 is externally attached to the end surface of the cylindrical member 28. The external opening 26b of the inspection hole 26 is closed by being detachably attached by covering from the side.

  However, since only the opening on the outer side of the concentrate burner 10 is closed by the lid 27, the inspection hole 26 is inside the wear hole 30 from the inner side of the concentrate burner 10 to the inside of the inspection hole 26. The smelting raw material and reaction gas that pass through at a high speed enter, and the smelting raw material and reaction gas swirl inside the inspection hole 26 to become a turbulent flow. As a result, the inspection hole 26 of the wear-resistant liner 30 There is a problem that wear tends to proceed from the bottom. Further, the smelting raw material may enter the gap 32 between the wear-resistant liner 30 and the water-cooled jacket 31 and may ignite inside the concentrate burner 10.

  In addition, the replacement work of the wear resistant liner 30 takes about half a day with the operation stopped. For this reason, delaying the progress of wear of the wear-resistant liner 30 and extending the life can be an effective means for increasing the operation rate of smelting.

  For example, Patent Document 1 describes a lid that closes an in-furnace inspection hole of a self-melting smelting furnace, but similarly has the above-described problem of reducing wear of the wear-resistant liner.

JP 2009-85522 A

  The present invention has been made to solve such a situation. In the inspection hole of the concentrate burner, the occurrence of turbulent flow in the inspection hole is suppressed, and the life of the liner in the concentrate burner is reduced. It is an object of the present invention to provide an insertion cover for a concentrate burner inspection hole that can be extended.

  A concentrate burner inspection hole insertion lid according to the present invention is a concentrate burner inspection hole insertion lid that is inserted into an inspection hole formed in a concentrate burner to close the inspection hole, and has a shape of the inspection hole. A lid portion that closes the inner opening on the inner side of the inspection hole, a main shaft that is attached to the lid portion, and that is attached to the main shaft so as to be separated from the lid portion. And a flange that closes the side opening.

  Furthermore, the front end surface of the lid portion may be formed so as to be flush with the inner peripheral surface of the liner of the concentrate burner.

  Furthermore, the collar portion may be in contact with the external opening of the inspection hole when the tip surface of the lid portion and the inner peripheral surface of the liner of the concentrate burner are flush with each other.

  Furthermore, the lid portion may be arranged so as to fill a gap between the liner and a jacket for cooling the liner when the inner side opening of the inspection hole is closed.

  Furthermore, the tip surface of the lid portion may be subjected to wear resistance processing.

  Furthermore, you may make it further provide the operation handle attached to the edge part on the opposite side to the cover part of a main axis | shaft.

  The concentrate burner inspection hole insertion lid according to the present invention can prevent the flow of the smelting raw material and the reaction gas into the inspection hole in the concentrate burner. Therefore, according to the insertion cover for the concentrate burner inspection hole according to the present invention, it is possible to suppress the occurrence of turbulent flow in the inspection hole, and further, it is possible to reduce the ignition risk in the inspection hole. The life of the liner in the concentrate burner can be extended, and it has extremely great industrial value.

It is the schematic which showed the use condition of the insertion lid of this invention. It is the perspective view which showed the insertion lid of this invention. It is the side view which showed the insertion lid of this invention. It is the top view which showed the insertion lid of this invention. It is the schematic which showed an example of the basic composition of a self-smelting furnace. It is the schematic which showed the conventional lid | cover.

  Hereinafter, an insertion lid for a concentrate burner inspection hole according to the present invention (hereinafter also simply referred to as an insertion lid) will be described with reference to the drawings. In addition, this invention is not limited to the following examples, In the range which does not deviate from the summary of this invention, it can change arbitrarily.

  As shown in FIG.1 and FIG.5, the insertion lid 1 which concerns on this invention is installed in the top part 11a of the self-melting smelting furnace 100 used for nonferrous metal smelting, for example, a copper concentrate, a flux, auxiliary | assistant In the concentrate burner 10 for sending the smelting raw material such as fuel and the reaction gas into the auto-smelting furnace 100, the internal condition of the concentrate burner 10, the internal condition of the reaction tower 11, etc. are confirmed. Inspecting the concentrate burner 10 that is detachably inserted into the inspection hole 26 for removing deposits such as the inside of the concentrate burner 10 and the tip of the auxiliary fuel burner 25 and closing the inspection hole 26 This is a plug-in type lid for the hole 26.

  In addition, about the inspection hole 26 in which the insertion lid 1 which concerns on this invention is inserted, the concentrate burner 10 in which this inspection hole 26 is formed, and the auto-smelting furnace 100 in which this concentrate burner 10 is installed are the said prior art. Except for the inspection hole 26, the concentrate burner 10, the auto-smelting furnace 100, and the lid 27, which are described in the column, have the same configuration, the same reference numerals are given here, and the description is omitted. Only the insertion lid 1 that closes the inspection hole 26 will be described.

  Specifically, as shown in FIGS. 2, 3, and 4, the insertion lid 1 is formed in accordance with the shape of the inspection hole 26 provided in the concentrate burner 10, and the inner side of the inner side of the inspection hole 26. The lid 2 that closes the opening 26 a, the main shaft 3 welded to the lid 2, and is welded to the middle portion of the main shaft 3 so as to be separated from the lid 2. There are provided a flange portion 4 for closing the side opening 26b, and an operation handle 5 serving as a handle welded to an end portion of the main shaft 3 opposite to the lid portion 2.

  According to the shape and size of the inspection hole 26, the lid 2 is formed, for example, in a hollow box shape that is substantially the same shape as the internal opening 26a of the inspection hole 26 as shown in FIG. The weight is reduced to the extent that the operator can open and close the inspection hole 26 with one hand. Further, as shown in FIG. 1, the lid portion 2 has a distal end surface of the lid portion 2 when the insertion lid 1 is inserted into the inspection hole 26 to close the inner side opening 26 a of the inspection hole 26. The front end surface 2a of the lid portion 2 is formed in the same curved shape as the inner peripheral surface 30a of the wear resistant liner 30 so that 2a and the inner peripheral surface 30a of the wear resistant liner 30 are flush with each other. Furthermore, the tip end surface 2 a of the lid 2 is sprayed with an abrasion resistant material and has the same durability as the abrasion resistant liner 30. Further, the lid portion 2 exists between the wear-resistant liner 30 and the water cooling jacket 31 when the insertion lid 1 is inserted into the inspection hole 26 to close the inner side opening 26 a of the inspection hole 26. It has a thickness that fills the gap 32. Furthermore, the lid portion 2 receives heat from the self-melting smelting furnace 100 and prevents the air inside the lid portion 2 from expanding, so that the lid portion 2 is provided on the outer side of the lid portion 2 (the heel portion 4 side). An air vent hole (not shown) is formed on the surface.

  As shown in FIG. 2, the main shaft 3 is composed of a rod member such as a cylinder or a prism, and has a distal end portion welded to the lid portion 2 and an operation handle 5 welded to the base end portion. Further, as shown in FIG. 1, the main shaft 3 has such a length that the base end portion is exposed to the outside from the inspection hole 26 when the lid portion 2 closes the inner side opening 26 a of the inspection hole 26. Have

  As shown in FIG. 2, the flange 4 is formed in a rectangular plate shape larger than the external opening 26 b of the inspection hole 26, and is welded to the middle portion of the main shaft 3. Specifically, as shown in FIG. 1, the flange portion 4 is integrated with the side surface of the burner cone 23 when the front end surface 2 a of the lid portion 2 and the inner peripheral surface 30 a of the wear resistant liner 30 are flush with each other. It is welded to the middle part of the main shaft 3 so as to be in contact with the end face of the formed cylindrical member 28 and positioned in the middle part of the main shaft 3 to position the insertion depth of the lid part 2. In addition, the collar part 4 is not limited to being formed in a rectangular plate shape, and may be formed in a circular shape, an elliptical shape, a polygonal shape other than a rectangular shape, or the like.

  When closing the inspection hole 26 of the concentrate burner 10 using the insertion lid 1, hold the operation handle 5 of the insertion lid 1 and cover the insertion lid 1 from the external opening 26 b of the inspection hole 26. The part 2 is inserted into the inspection hole 26, and the insertion lid 1 is inserted into the inspection hole 26 until the flange part 4 comes into contact with the end surface of the tubular member 28 of the burner cone 23. Then, the inner side opening portion 26 a of the inspection hole 26 is closed by the lid portion 2, and the outer side opening portion 26 b of the inspection hole 26 is closed by the flange portion 4, so that the space between the wear-resistant liner 30 and the water cooling jacket 31 is closed. The gap 32 and the inspection hole 26 are blocked by the lid portion 2, and the tip end surface 2 a of the lid portion 2 and the inner peripheral surface 30 a of the wear-resistant liner 30 are flush with each other.

  As described above, the insertion lid 1 is inserted into the inspection hole 26 of the concentrate burner 10, and the eaves part 4 closes the outer side opening 26 b of the inspection hole 26 and matches the shape of the inspection hole 26. The smelting raw material and the reaction gas flow into the inspection hole 26 from the inner side opening 26a of the concentrate burner 10 by the formed lid 2 closing the inner side opening 26a of the inspection hole 26. Therefore, the occurrence of turbulent flow in the inspection hole 26 can be suppressed, the life of the wear-resistant liner 30 can be extended, and it has an extremely great industrial value.

  Further, the insertion lid 1 is formed so that the front end surface 2a of the lid portion 2 is flush with the inner peripheral surface 30a of the wear-resistant liner 30 of the concentrate burner 10, so that the inner side of the concentrate burner 10 is provided. It is possible to prevent the smelting raw material and the reaction gas from flowing into the inspection hole 26 from the opening 26a, and to prevent the flow of the smelting raw material and the reaction gas in the concentrate burner 10 from being prevented. Therefore, the occurrence of turbulent flow in the inspection hole 26 and in the vicinity of the inspection hole 26 in the concentrate burner 10 can be suppressed, and the life of the wear-resistant liner 30 can be further extended.

  Furthermore, when the insertion lid 1 is flush with the front end surface 2a of the lid portion 2 and the inner peripheral surface 30a of the wear-resistant liner 30 of the concentrate burner 10, the flange portion 4 has an opening on the outside of the inspection hole 26. When the lid 4 is used to close the inspection hole 26 of the concentrate burner 10 by using the insertion lid 1, the flange 4 is burner cone. By inserting the insertion lid 1 into the inspection hole 26 until it contacts the end surface of the cylindrical member 28, the tip end surface 2a of the lid portion 2 and the inner peripheral surface 30a of the wear-resistant liner 30 can be flush with each other. It is possible to easily position the insertion depth of the lid portion 2, and the workability can be greatly improved.

  Further, the lid 2 has a thickness that fills the gap 32 between the wear-resistant liner 30 and the water cooling jacket 31 when the inner opening 26 a of the inspection hole 26 is closed. As a result, the gap 32 between the wear-resistant liner 30 and the water cooling jacket 31 can be filled when the insertion lid 1 is inserted into the inspection hole 26 to close the inner side opening 26 a of the inspection hole 26. Further, it is possible to prevent the smelting raw material or the like from entering the gap 32 and ignite inside the concentrate burner 10.

  The insertion lid 1 is not limited to providing the operation handle 5 at the end of the main shaft 3 opposite to the lid portion 2, and may be directly attached to the flange portion 4.

  Moreover, although it is preferable that the insertion part 1 has the thickness which the cover part 2 fills the clearance gap 32 between the abrasion-resistant liner 30 and the water cooling jacket 31, it is not limited to this, The inspection hole 26 The inner opening 26a may be closed, and the lid 2 may have a thickness enough to fill a part of the gap 32. It may be formed to have the same thickness as the wear liner 30 or slightly thinner.

1 Insertion lid, 2 lid part, 2a tip surface, 3 main shaft, 4 collar part, 5 operation handle, 10 concentrate burner, 11 reaction tower, 11a top part, 12 Karami outlet, 13 river outlet, 14 settler, 15 exhaust Flue, 16 Electric smelting furnace, 17 boiler, 18 electrodes, 19 outlet, 21 concentrate chute, 22 gas feed pipe for reaction, 22a lower end, 23 burner cone, 23a upper end, 24 wind speed regulator, 25 for auxiliary fuel Burner, 26 Inspection hole, 26a Internal opening, 26b External opening, 27 Lid, 28 Cylindrical member, 30 Wear-resistant liner, 30a Inner peripheral surface, 31 Water-cooled jacket, 32 Clearance, 100 Auto-smelting furnace

Claims (6)

A plug for a concentrate burner inspection hole that is inserted into an inspection hole formed in the concentrate burner and closes the inspection hole,
A lid portion that is formed in accordance with the shape of the inspection hole and closes the inner side opening on the inner side of the inspection hole;
A main shaft attached to the lid,
An insertion lid for a concentrate burner inspection hole, comprising a flange portion attached to the main shaft at a distance from the lid portion and closing an external opening on the outside of the inspection hole.   2. The concentrate burner inspection hole insertion lid according to claim 1, wherein a front end surface of the lid portion is formed to be flush with an inner peripheral surface of a liner of the concentrate burner.   The said collar part contact | abuts the outer side opening part of the said inspection hole, when the front end surface of the said cover part and the inner peripheral surface of the liner of the said concentrate burner become flush | level. The cover for the concentrate burner inspection hole described in 1.   The lid portion fills a gap between the liner and a jacket arranged on the outside of the liner to cool the liner when the inner side opening of the inspection hole is closed. The plug for a concentrate burner inspection hole according to any one of claims 1 to 3.   5. The concentrate burner inspection hole insertion lid according to claim 1, wherein a tip end surface of the lid portion is subjected to wear resistance processing. 6.   6. The concentrate burner inspection hole insertion lid according to any one of claims 1 to 5, further comprising an operation handle attached to an end portion of the main shaft opposite to the lid portion.

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